CN109266900A - A kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant and preparation method thereof - Google Patents
A kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant and preparation method thereof Download PDFInfo
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- CN109266900A CN109266900A CN201811498242.2A CN201811498242A CN109266900A CN 109266900 A CN109266900 A CN 109266900A CN 201811498242 A CN201811498242 A CN 201811498242A CN 109266900 A CN109266900 A CN 109266900A
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- 239000000956 alloy Substances 0.000 title claims abstract description 196
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 194
- 230000007797 corrosion Effects 0.000 title claims abstract description 47
- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 229910000581 Yellow brass Inorganic materials 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910052802 copper Inorganic materials 0.000 claims abstract description 73
- 239000010949 copper Substances 0.000 claims abstract description 73
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 65
- 239000010951 brass Substances 0.000 claims abstract description 62
- 238000005266 casting Methods 0.000 claims abstract description 32
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000010703 silicon Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000002844 melting Methods 0.000 claims abstract description 18
- 230000008018 melting Effects 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 17
- 239000011701 zinc Substances 0.000 claims abstract description 17
- 238000009749 continuous casting Methods 0.000 claims abstract description 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 4
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims description 25
- 229910052714 tellurium Inorganic materials 0.000 claims description 23
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 23
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 22
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 11
- WUUZKBJEUBFVMV-UHFFFAOYSA-N copper molybdenum Chemical compound [Cu].[Mo] WUUZKBJEUBFVMV-UHFFFAOYSA-N 0.000 claims description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 8
- 239000010931 gold Substances 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 8
- 239000011733 molybdenum Substances 0.000 claims description 8
- 238000001192 hot extrusion Methods 0.000 claims description 7
- 238000010583 slow cooling Methods 0.000 claims description 7
- 229910052684 Cerium Inorganic materials 0.000 claims description 5
- 229910052779 Neodymium Inorganic materials 0.000 claims description 5
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 5
- 229910052746 lanthanum Inorganic materials 0.000 claims description 5
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 5
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 5
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 8
- 230000036541 health Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000009716 squeeze casting Methods 0.000 abstract 1
- 239000006104 solid solution Substances 0.000 description 17
- 238000005520 cutting process Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 229910010271 silicon carbide Inorganic materials 0.000 description 8
- 229910002535 CuZn Inorganic materials 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 229910000881 Cu alloy Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 230000016507 interphase Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 241000186216 Corynebacterium Species 0.000 description 2
- 230000003026 anti-oxygenic effect Effects 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000001721 carbon Chemical class 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 229910001015 Alpha brass Inorganic materials 0.000 description 1
- 229910018030 Cu2Te Inorganic materials 0.000 description 1
- 229910000928 Yellow copper Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention belongs to brass alloys technical fields, specifically disclose a kind of Anti-dezincificationyellow yellow brass alloy and preparation method thereof of lead-free corrosion resistant, the Anti-dezincificationyellow yellow brass alloy includes the element of following weight fraction: copper 55%-60%, zinc 35%-40%, aluminium 0.5%-1.5%, rare earth element 0.1%-0.2%, silicon 1.5%-2.0%, carbon 1.0%-1.5%, impurity≤0.1%, it passes sequentially through raw material preparation, melting and continuous casting even squeeze or continuous casting and rolling preparation gained, with good corrosion resistance and casting and machining property, meet reduction environment, human health damage and the demand for improving service life of equipment.
Description
Technical field
The invention belongs to brass alloys technical field, in particular to the Anti-dezincificationyellow yellow brass alloy of a kind of lead-free corrosion resistant and its
Preparation method.
Background technique
The main ingredient of brass is copper and zinc, and the ratio of the two is typically about 7: 3 or 6: 4, and Dezincification corrosion is that brass closes
A kind of selective corrosion of gold.When copper-zinc alloy in such as seawater, fresh water aqueous solution (when applying), part of the surface zinc is etched,
Preferential dissolution alloy surface；And copper contained by alloy remains on base material, leaves the copper sponge of a red multiple hole, this
Kind phenomenon is Dezincification corrosion phenomenon.
In general, being not susceptible to dezincification, but with the increasing of Zn content when weight percent of the Zn content less than 15%
Adding, brass is then easy to happen dezincification phenomenon, especially after the weight percent of zinc is greater than 30%, the Dezincification corrosion phenomenon meeting of brass
It becomes apparent.
Existing reported in literature, composition of alloy structure and environmental factor will affect Dezincification corrosion phenomenon, from the point of view of composition of alloy,
Single-phase alpha brass of the zinc content greater than 20% leaves porous copper after dezincification, and the Dezincification corrosion of alpha+beta two-phase brass is first from β
Mutually start, after β phase is completely transformed into loose copper, then expands to α phase；The higher ε phase of zinc content or γ phase brass, due to de-
ε → γ → β → α phase transition, variation of the transformation degree according to external conditions such as dezincification time, medium and externally-applied potentials can occur for zinc
And change (referring to Wang Jihui et al., 1999, investigation of materials journal, the 13rd phase, the 1-8 pages).
Since dezincification of brass phenomenon can seriously destroy the structure of brass alloys, drop the surface layer mechanical strength of brass ware
It is low, brass tube perforation is even resulted in, material premature failure is often made, substantially shortens the service life of brass ware, and causes to answer
With problem.Therefore, international generally to receive such as institutes such as AS 2345, ISO 6509 for the anti-dezincification ability of brass ware
Calibration is quasi-, i.e. the depth of brass product surface dezincification layer must not exceed 100 μm.
Currently, the problem of existing Dezincification corrosion resistant brass is primarily present in the market is high for lead tolerance, wherein using the most
Extensive forging DR brass CuZn35Pb2All containing the Pb of 1.5wt%-2.2wt% in Al, so that the processing of brass material is special
Property.
However, with the raising of environmental consciousness, the problem of influence of the heavy metal for human health and environmental pollution by
It is gradually taken seriously, therefore, the use for limiting lead-containing alloy is current trend.The states such as Japan, the U.S. revise relevant laws and regulations successively,
Strongly push reduce environment in use object leaded rate, cover for household electrical appliances, automobile, water periphery product lead-containing alloy material
Material, special requirement can not be from product dissolution lead to drinking water, and lead contamination must be avoided in procedure for processing.Therefore, industry
Still Persisting exploitation brass material finds alternative leaded anti-dezincification brass, but still takes into account casting and machining property and resist
The alloy formula of Dezincification corrosion.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide a kind of the anti-de- of lead-free corrosion resistant
Zinc yellow copper alloy, the present invention replace lead element that free-cutting brass material is made, have good corrosion resistance with silicon, carbon
And casting and machining property, meet reduce environment, human health damage and improve service life of equipment demand.
Second object of the present invention is to provide a kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, make
Obtaining its brass alloys obtained has good corrosion resistance and casting and machining property.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that
A kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, the element comprising following weight fraction: copper 55%-60%, zinc 35%-
40%, aluminium 0.5%-1.5%, rare earth element 0.1%-0.2%, silicon 1.5%-2.0%, carbon 1.0%-1.5%, impurity≤
0.1%.
By using above-mentioned technical proposal, in brass alloys, copper and zinc can form CuZn solid solution, and CuZn solid solution
By face-centred cubic structure, body-centered cubic structure first structure cell in the form of exist.The CuZn solid solution of face-centred cubic structure is at normal temperature
With excellent processing performance, the CuZn solid solution of body-centered cubic structure is hard and crisp at normal temperature but has at high temperature excellent
Aluminium element is added on this basis and is capable of forming the AlCuZn solid solution with super cell's structure for processing performance.
Wherein, super cell's structure of AlCuZn is made of two kinds of forms, and one is in face-centred cubic structure CuZn solid solution
On the basis of aluminium atom zinc atom replaced with displacement format, form the super crystal solid solution of AlCuZn of similar face-centred cubic structure, this
Solid solution hardness is lower, and has good plastic deformation ability；Another kind is the CuZn solid solution in body-centered cubic structure
On the basis of aluminium atom be internally embedded Cu, Zn, Al atom in first structure cell while replace zinc atom with displacement format, form similar body
AlCuZn super cell's solid solution of heart cubic structure, super cell's solid solution are inheriting the solid solution of body-centered cubic structure CuZn member structure cell
In the hard and crisp performance basis of body, since Cu, Zn, Al atom are distributed with diagonal way, machining stress point is greatly improved
Cloth direction, the stress being formed with beneficial to machining concentrate performance, significantly improve the machinability of product.
Rare earth element is added in brass alloys, rare earth element is active transition elements, solid in AlCuZn super cell
In solution, rare earth element can preferably refine AlCuZn super cell's solid solution, improve the anti-Dezincification corrosion of brass alloys
Can, so that brass alloys have good cutting effect and surface smoothness, reduction twines knife problem.
Element silicon can be dissolved in β phase, and β phase can be promoted to become fragile, and be easy to be broken in cutting process, so as to improve
The processing performance of brass alloys；But when silicone content is higher, and the anti-Dezincification corrosion degradation of brass alloys can be made, therefore
The content of silicon is set as silicon 1.5%-2.0%；
In addition, silicon and carbon are capable of forming SiC, it is the extremely strong compound of covalent bond, high, anti-oxidant, wear-resisting with elevated temperature strength,
The features such as corrosion-resistant.During brass casting, silicon carbide is between solid-liquid two-phase region, since silicon can preferably be solid-solution in copper
In, with this carbon is uniformly distributed in the solid solution of copper and copper alloy, and then brittleness grain can be formed with copper
The interphase of shape distribution facilitates the cutting ability and casting character that improve brass alloys.
With this simultaneously as pair that the granular distribution of interphase can generate brass alloys during being corroded
Vacancy is filled up, to effectively increase the corrosion resistance of brass alloys, while avoiding adding for the heavy metal elements such as lead, antimony
Enter, meeting reduces environment, human health damage and the demand for improving service life of equipment.
Further, the weight ratio of the elemental silicon and elemental carbon is 3:2.
By using above-mentioned technical proposal, the weight ratio of elemental silicon and elemental carbon is 3:2 in the present invention, is enabled to this
Element silicon is excessive.Wherein, the interphase that extra element silicon can promote copper and other metals to be formed is precipitated, and improves metal
The mobility of intermetallic compound can preferably improve the machinability of brass alloys with this, effectively increase brass alloys
Processing forming.
Further, the rare earth element is one of lanthanum, cerium, praseodymium, neodymium or a variety of combinations.
By using above-mentioned technical proposal, in brass alloys, lanthanum, cerium, praseodymium, neodymium can be used as alterant, can make brass
In silicon tiny nodular, corynebacterium are become from coarse gill shape or bone shape, and be evenly distributed, hence it is evident that improve brass conjunction
The intensity and plasticity of gold；In addition, lanthanum, cerium, praseodymium, neodymium are the rare earth element of lightweight, it can reduce the weight of brass alloys, have
Good prospects for commercial application.
Further, the Anti-dezincificationyellow yellow brass alloy further includes the elemental tellurium for having weight fraction for 0.2%-0.5%.
Further, the Anti-dezincificationyellow yellow brass alloy further include have weight fraction be 0.3% elemental tellurium.
By using above-mentioned technical proposal, tellurium can generate one kind in crystal boundary part and same subsurface stratum in high-temperature oxydation
Cu2Te cenotype can effectively prevent oxygen from improving the antioxygenic property of brass alloys in copper-based middle diffusion, effective one；In addition, brass
Rare earth element in alloy can refine the cenotype when tellurium and copper form cenotype, effectively hinder the cenotype at high temperature
It persistently grows up, and then preferably improves the cutting ability of brass alloys.
Further, the Anti-dezincificationyellow yellow brass alloy further includes the molybdenum for having weight fraction for 0.5%-1.0%.
Further, the Anti-dezincificationyellow yellow brass alloy further include have weight fraction be 0.8% molybdenum.
It by using above-mentioned technical proposal, is said from biology angle, molybdenum is necessary microelement in human body, therefore to people
Body is harmless；From in metallurgy, molybdenum belongs to one of refractory metal, can form molybdenum-copper with copper, have and improve temperature
Intensity increases toughness and extraordinary resistance to corrosion.In addition, molybdenum can also act synergistically with rare earth element, it is effectively improved Huang
The creep resistance of copper alloy.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that
A kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, comprising the following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy and silicon carbide powder
For raw material；
B, melting
B-1, fine copper and silicon carbide powder are put into heating furnace, are heated to copper melting completely, obtain copper melt；
B-2, crystalline flake graphite is added as coverture toward the copper melt of b-1, then sequentially adds copper zinc intermediate alloy, in copper aluminium
Between alloy, RE oxide powder and sial intermediate alloy, while slow cooling is to 1000 DEG C, to copper zinc intermediate alloy, copper aluminium
After intermediate alloy and sial intermediate alloy all melt, 920-900 DEG C at a temperature of stir 15-20min, it is molten to obtain alloy
Melt body；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, by itself and mold one when ingot casting is cooled to 800-850 DEG C
Hot extrusion is carried out with being put into continuous extruder, the oxide layer of material surface is then removed and is closed to get final anti-dezincification brass
Gold.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that
A kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, comprising the following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy, silicon carbide powder,
It is raw material among tellurium copper intermediate alloy and molybdenum copper；
B, melting
B-1, fine copper, molybdenum copper intermediate alloy and silicon carbide powder are put into heating furnace, are heated to copper melting completely, it is molten obtains copper
Melt body；
B-2, crystalline flake graphite is added as coverture toward the copper melt of b-1, then sequentially adds copper zinc intermediate alloy, in copper aluminium
Between alloy, RE oxide powder, sial intermediate alloy and tellurium copper intermediate alloy, while slow cooling is to 1000 DEG C, to copper zinc
After intermediate alloy, copper-aluminium master alloy and sial intermediate alloy all melt, 920-900 DEG C at a temperature of stir 15-
20min obtains alloy melt；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, by itself and mold one when ingot casting is cooled to 800-850 DEG C
Hot extrusion is carried out with being put into continuous extruder, the oxide layer of material surface is then removed and is closed to get final anti-dezincification brass
Gold.
By using above-mentioned technical proposal, the addition of silicon carbide and aluminium silicon intermediate alloy as element silicon is used in the present invention
Raw material, wherein the carbon atom in silicon carbide and silicon atom structural stability, fusing point are higher than copper and the fusing point of other copper alloys,
Therefore the molecular structure of itself can be remained in brass alloys production process, and then can preferably improve brass conjunction
The corrosion resistance and cutting ability and casting character of gold；And the silicon in sial intermediate alloy can during alloy melting
It is preferably solid-solution in copper, can complement each other with silicon carbide, so that silicon carbide is preferably distributed in copper and other metals；
In addition, silicon carbide has good antioxygenic property, it is carried out in addition heating furnace together with fine copper, can effectively be pressed down
Fine copper processed aoxidizes in melting process, guarantees the good performance of copper；
Wherein, rare earth element uses its corresponding oxide to make raw material in the present invention, relatively with other alloy materials, helps
In the precision for improving its content, the production cost of brass alloys is reduced；Oxygen element in rare earth oxide can then pass through squama
Piece graphite is effectively removed, in order to avoid the oxidation of brass alloys.Therefore, the present invention has the characteristics that easy to operate, while it is made
The brass alloys obtained have good corrosion resistance and casting and machining property.
In conclusion the invention has the following advantages:
1, the present invention replaces lead element that free-cutting brass material is made with Si, C element, has good corrosion resistance and casting
It makes and machining property, meeting reduces environment, human health damage and the demand for improving service life of equipment；
2, rare earth element can preferably refine AlCuZn super cell's solid solution in brass alloys in the present invention, in addition can also incite somebody to action
Silicon is refined into tiny nodular or corynebacterium, effectively increases the intensity and plasticity of brass alloys；
3, the present invention can act synergistically with rare earth element by addition tellurium and molybdenum element, further improve brass
The cutting ability of alloy, while increasing brass alloys creep resistance；
4, the present invention uses the adding raw materials of silicon carbide and sial intermediate alloy as element silicon, can complement each other, effectively
The corrosion resistance and cutting ability and casting character of improvement brass alloys.
Detailed description of the invention
Fig. 1 is the process flow chart of the preparation Anti-dezincificationyellow yellow brass alloy of embodiment 1；
Fig. 2 is the process flow chart of the preparation Anti-dezincificationyellow yellow brass alloy of embodiment 6；
Fig. 3 is the process flow chart of the preparation Anti-dezincificationyellow yellow brass alloy of embodiment 9.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Wherein, raw material in embodiments of the present invention is all made of conventional industrial pure metal or the non-pure metal of industry, yuan
The measurement of plain weight fraction is carried out according to GB/T 5121-2008.
1, embodiment
1.1, embodiment 1
A kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, referring to Fig. 1, comprising the following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy and silicon carbide powder
For raw material；
Wherein, the weight fraction of the zinc in copper zinc intermediate alloy is 50%, and the weight fraction of the aluminium in copper-aluminium master alloy is
10%, the weight fraction of the silicon in sial intermediate alloy is 25%, and RE oxide powder is lanthanum oxide powder；
B, melting
B-1, fine copper and silicon carbide powder are put into heating furnace, are heated to 1200 DEG C and make copper melting completely, obtains copper melting
Body；
The crystalline flake graphite layer of the copper melt addition 0.5cm thickness of b-2, past b-1 then sequentially adds among copper zinc as coverture
Alloy, copper-aluminium master alloy, RE oxide powder and sial intermediate alloy, while slow cooling is to 1000 DEG C, in copper zinc
Between after alloy, copper-aluminium master alloy and sial intermediate alloy all melt, 920-900 DEG C at a temperature of stir 15-
During which 20min skims, obtain alloy melt；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, (ingot casting is rigid at this time when ingot casting is cooled to 800-850 DEG C
Just solidification), it is put into continuous extruder together with the mold for being preheated to 450-500 DEG C and carries out hot extrusion, is then removed
The oxide layer of material surface is to get final Anti-dezincificationyellow yellow brass alloy, wherein the weight of each element in the Anti-dezincificationyellow yellow brass alloy
Score is as shown in Table 1.
1.2, embodiment 2- embodiment 5
Embodiment 2- embodiment 5 on the basis of the method for embodiment 1, makes adjustment to raw material additive amount, and element wt is made
Score Anti-dezincificationyellow yellow brass alloy as shown in Table 1.
1.3, embodiment 6
A kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, referring to fig. 2, comprising the following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy, silicon carbide powder and
Tellurium copper intermediate alloy is raw material；
Wherein, the weight fraction of the zinc in copper zinc intermediate alloy is 50%, and the weight fraction of the aluminium in copper-aluminium master alloy is
10%, the weight fraction of the silicon in sial intermediate alloy is 25%, and the weight fraction of the tellurium in tellurium copper alloy is 50%；
B, melting
B-1, fine copper and silicon carbide powder are put into heating furnace, are heated to 1200 DEG C and make copper melting completely, obtains copper melting
Body；
The crystalline flake graphite layer of the copper melt addition 0.5cm thickness of b-2, past b-1 then sequentially adds among copper zinc as coverture
Alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy and tellurium copper intermediate alloy, while slow cooling is extremely
1000 DEG C, after copper zinc intermediate alloy, copper-aluminium master alloy, sial intermediate alloy and tellurium copper intermediate alloy all melt,
15-20min is stirred at a temperature of 920-900 DEG C, is during which skimmed, and alloy melt is obtained；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, (ingot casting is rigid at this time when ingot casting is cooled to 800-850 DEG C
Just solidification), it is put into continuous extruder together with the mold for being preheated to 450-500 DEG C and carries out hot extrusion, is then removed
The oxide layer of material surface is to get final Anti-dezincificationyellow yellow brass alloy, wherein the weight of each element in the Anti-dezincificationyellow yellow brass alloy
Score is as shown in Table 1.
1.4, embodiment 7- embodiment 8
Embodiment 7- embodiment 8 on the basis of the method for embodiment 6, makes adjustment to raw material additive amount, and element wt is made
Score Anti-dezincificationyellow yellow brass alloy as shown in Table 1.
1.5, embodiment 9
A kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, referring to Fig. 3, comprising the following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy, silicon carbide powder,
Tellurium copper intermediate alloy and molybdenum copper intermediate alloy are raw material；
Wherein, the weight fraction of the zinc in copper zinc intermediate alloy is 50%, and the weight fraction of the aluminium in copper-aluminium master alloy is
10%, the weight fraction of the silicon in sial intermediate alloy is 25%, and the weight fraction of the tellurium in tellurium copper alloy is 50%, in molybdenum copper
Between the weight fraction of molybdenum in alloy be 20%；
B, melting
B-1, fine copper, molybdenum copper intermediate alloy and silicon carbide powder are put into heating furnace, are heated to 1200 DEG C and copper has been melted
Entirely, copper melt is obtained；
The crystalline flake graphite layer of the copper melt addition 0.5cm thickness of b-2, past b-1 then sequentially adds among copper zinc as coverture
Alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy and tellurium copper intermediate alloy, while slow cooling is extremely
1000 DEG C, after copper zinc intermediate alloy, copper-aluminium master alloy, sial intermediate alloy and after all melting with tellurium copper intermediate alloy,
15-20min is stirred at a temperature of 920-900 DEG C, is during which skimmed, and alloy melt is obtained；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, (ingot casting is rigid at this time when ingot casting is cooled to 800-850 DEG C
Just solidification), it is put into continuous extruder together with the mold for being preheated to 450-500 DEG C and carries out hot extrusion, is then removed
The oxide layer of material surface is to get final Anti-dezincificationyellow yellow brass alloy, wherein the weight of each element in the Anti-dezincificationyellow yellow brass alloy
Score is as shown in Table 1.
1.6, embodiment 10- embodiment 11
Embodiment 10- embodiment 11 on the basis of the method for embodiment 9, makes adjustment to raw material additive amount, and element weight is made
Measure score Anti-dezincificationyellow yellow brass alloy as shown in Table 1.
Table one: the weight fraction of each element of Anti-dezincificationyellow yellow brass alloy made from embodiment 1- embodiment 11, surplus be≤
1% inevitable impurity
2, comparative example
Comparative example 1 is well known ledrite CuZn39PbAl, and comparative example 2 is well known DR brass CuZn35Pb2Al.
3, performance test
The brass alloys of embodiment 1- embodiment 11 and comparative example 1 and comparative example 2 are performed the following performance tests.
3.1, casting character:
Body shrinks sample: to evaluate the concentrating shrinkage cavity of alloy, dispersed shrinkage and loose.The concentrating shrinkage cavity surface of body contraction sample
It is smooth, without visible loose, it is excellent that sample section, which is visible by naked eyes dispersed shrinkage,；Concentrating shrinkage cavity surface is more smooth, bottom naked eyes
It can be seen that loose depth is less than 5mm, it is good that sample section, which is visible by naked eyes dispersed shrinkage,；Concentrating shrinkage cavity is rough, bottom
Visually visible loose depth is greater than 5mm, regardless of section is poor whether there is or not dispersed shrinkage；
Bar-shaped sample: for measuring the linear shrinkage ratio of alloy；
Conveyor screw sample: for measuring the trickling length of alloy melt, to measure the mobility of alloy.
3.2, it mechanical property: is measured according to the test method of GB/T 228-2010.
3.3, hardness: according to GB/T 231.1-2009.
3.4, cutting ability:
Cutting test horizontal machine tool on carry out, the cutting ability of alloy is measured using the shape of clast.By sample
Under equal conditions carry out turnery processing, chip breaking in tiny hour hand shape be it is excellent, chip breaking in tiny short volume bits and fan-shaped bits be it is good,
Chip breaking is that long paper bits are poor.
3.5, anti-Dezincification corrosion performance
Dezincification test is carried out according to AS 2345,10mm × 10mm × 3mm plate is made in sample, in 75 ± 3 DEG C of copper chloride
Constant temperature corrosion for 24 hours, measures the weight fraction of Zn-ef ficiency reduction in solution.
4, test result
Test result is as follows shown in table two.
Table two: the performance test results of embodiment 1- embodiment 11 and comparative example 1 and comparative example 2
Referring to table two, the testing result of embodiment 1- embodiment 4 is compared with comparative example 1 and comparative example 2, it is available,
The present invention has more excellent mobility, mechanical property, hardness and anti-Dezincification corrosion performance, in order to avoid containing big in brass
It measures heavy metal and causes damages to human body and environment.
It is available by the testing result of embodiment 1 to embodiment 4, when the weight ratio of elemental silicon and elemental carbon is 3:2,
Its Anti-dezincificationyellow yellow brass alloy obtained has more excellent casting character, mechanical property, hardness and anti-Dezincification corrosion performance.
Embodiment 1 is compared with the testing result of embodiment 5, it is available, when rare earth element select be lanthanum, cerium,
When one of praseodymium, neodymium or a variety of combinations, Anti-dezincificationyellow yellow brass alloy obtained has more excellent casting character, mechanics
Performance, hardness and anti-Dezincification corrosion performance.
Embodiment 1 is compared with the testing result of embodiment 6 to embodiment 8, it is available, when anti-dezincification brass closes
It is added with tellurium element in gold, casting character, mechanical property, hardness and the anti-Dezincification corrosion of anti-dezincification alloy can be effectively improved
Performance, wherein when tellurium element weight fraction reaches 0.3%, performance is optimal.
Embodiment 1 is compared with the testing result of embodiment 9 to embodiment 11, it is available, when anti-dezincification brass
It is added with molybdenum element in alloy, can further improve casting character, mechanical property, hardness and the anti-dezincification of anti-dezincification alloy
Corrosive nature, wherein when the weight fraction of molybdenum element reaches 0.8%, performance is optimal.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (9)
1. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant, which is characterized in that the element comprising following weight fraction: copper
55%-60%, zinc 35%-40%, aluminium 0.5%-1.5%, rare earth element 0.1%-0.2%, silicon 1.5%-2.0%, carbon
1.0%-1.5%, impurity≤0.1%.
2. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant according to claim 1, which is characterized in that the elemental silicon
Weight ratio with elemental carbon is 3:2.
3. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant according to claim 1, which is characterized in that the rare earth member
Element is one of lanthanum, cerium, praseodymium, neodymium or a variety of combinations.
4. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant according to claim 1, which is characterized in that the anti-dezincification
Brass alloys further include the elemental tellurium for having weight fraction for 0.2%-0.5%.
5. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant according to claim 4, which is characterized in that the anti-dezincification
Brass alloys further include have weight fraction be 0.3% elemental tellurium.
6. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant according to claim 4, which is characterized in that the anti-dezincification
Brass alloys further include the molybdenum for having weight fraction for 0.5%-1.0%.
7. a kind of Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant according to claim 6, which is characterized in that the anti-dezincification
Brass alloys further include have weight fraction be 0.8% molybdenum.
8. a kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant described in any one of claim 1-3,
It is characterized in that, comprising the following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy and silicon carbide powder
For raw material；
B, melting
B-1, fine copper and silicon carbide powder are put into heating furnace, are heated to copper melting completely, obtain copper melt；
B-2, crystalline flake graphite is added as coverture toward the copper melt of b-1, then sequentially adds copper zinc intermediate alloy, in copper aluminium
Between alloy, RE oxide powder and sial intermediate alloy, while slow cooling is to 1000 DEG C, to copper zinc intermediate alloy, copper aluminium
After intermediate alloy and sial intermediate alloy all melt, 920-900 DEG C at a temperature of stir 15-20min, it is molten to obtain alloy
Melt body；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, by itself and mold one when ingot casting is cooled to 800-850 DEG C
Hot extrusion is carried out with being put into continuous extruder, the oxide layer of material surface is then removed and is closed to get final anti-dezincification brass
Gold.
9. a kind of preparation method of the Anti-dezincificationyellow yellow brass alloy of lead-free corrosion resistant as claimed in claim 6, which is characterized in that including
Following steps:
A, raw material preparation
With fine copper, copper zinc intermediate alloy, copper-aluminium master alloy, RE oxide powder, sial intermediate alloy, silicon carbide powder,
It is raw material among tellurium copper intermediate alloy and molybdenum copper；
B, melting
B-1, fine copper, molybdenum copper intermediate alloy and silicon carbide powder are put into heating furnace, are heated to copper melting completely, it is molten obtains copper
Melt body；
B-2, crystalline flake graphite is added as coverture toward the copper melt of b-1, then sequentially adds copper zinc intermediate alloy, in copper aluminium
Between alloy, RE oxide powder, sial intermediate alloy and tellurium copper intermediate alloy, while slow cooling is to 1000 DEG C, to copper zinc
After intermediate alloy, copper-aluminium master alloy and sial intermediate alloy all melt, 920-900 DEG C at a temperature of stir 15-
20min obtains alloy melt；
C, continuous casting even crowded or continuous casting and rolling
It casts the obtained alloy melt of step b-2 to form ingot casting, by itself and mold one when ingot casting is cooled to 800-850 DEG C
Hot extrusion is carried out with being put into continuous extruder, the oxide layer of material surface is then removed and is closed to get final anti-dezincification brass
Gold.
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| CN110527865A (en) * | 2019-09-09 | 2019-12-03 | 四川大学 | A kind of preparation of high-strength high-conductivity copper selenium complex alloy material and deformation method |
| IT202000004480A1 (en) * | 2020-03-03 | 2021-09-03 | A L M A G S P A Azienda Lavorazioni Metallurgiche E Affini Gnutti | PROCESS FOR OBTAINING A BRASS BILLET WITH A REDUCED LEAD CONTENT AND BILLET SO OBTAINED |
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Application publication date: 20190125 |