CN1051593A - Low chromium medium-Si, Mo ferrite ductile cast iron - Google Patents
Low chromium medium-Si, Mo ferrite ductile cast iron Download PDFInfo
- Publication number
- CN1051593A CN1051593A CN 89107331 CN89107331A CN1051593A CN 1051593 A CN1051593 A CN 1051593A CN 89107331 CN89107331 CN 89107331 CN 89107331 A CN89107331 A CN 89107331A CN 1051593 A CN1051593 A CN 1051593A
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- CN
- China
- Prior art keywords
- cast iron
- alloy
- ductile cast
- ferrite
- low chromium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011651 chromium Substances 0.000 title claims abstract description 17
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 13
- 229910052750 molybdenum Inorganic materials 0.000 title claims abstract description 12
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 11
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 239000011572 manganese Substances 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 abstract description 22
- 229910045601 alloy Inorganic materials 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 10
- BKUKXOMYGPYFJJ-UHFFFAOYSA-N 2-ethylsulfanyl-1h-benzimidazole;hydrobromide Chemical compound Br.C1=CC=C2NC(SCC)=NC2=C1 BKUKXOMYGPYFJJ-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 7
- 238000000465 moulding Methods 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910000753 refractory alloy Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A kind of low chromium medium-Si, Mo ferrite ductile cast iron alloy, its Chemical Composition (calculating by weight percentage) is: C:2.0～3.0%; Si:4.5～6.0; Mo0.8～1.6%; Mn:0.06～0.17%; Cr:0.2～0.4%; P:0.03～0.07%; S:0.004～0.02%; Rc:0.04～0.07%; Mg:0.03～0.05%; All the other are Fe.The metallographic structure under as cast condition of this alloy is: based on ferrite, contain a small amount of carbide, graphite is spherical existence, have high temperature tensile strength and anti-hot and cold fragility and resistance of oxidation preferably, machining property is good, is specially adapted to be used as the high-temperature resistance die material in development and small size production.
Description
The present invention is low, and chromium medium-Si, Mo ferrite ductile cast iron belongs to casting alloy.
At present, in the heat-stable material of industrial use, majority belongs to refractory alloy class material and Heat resisting cast steel class material, and mechanical workout is difficulty relatively, and material price is also relatively more expensive.The high ductile cast iron material of introducing among the american documentation literature US4450019 of a kind of resistance toheat is mainly used in the manufacturing automobile exhaust pipe.But this kind material castability is poor, and red brittleness and tensile strength are not high when working under 950 ℃ high temperature, is not suitable for doing the moulding stock of work under the high temperature.
The low chromium medium-Si, Mo ferrite ductile cast iron moulding stock that the objective of the invention is to solve above-mentioned the deficiencies in the prior art and a kind of high temperature resistant (up to 950 ℃) are provided, machinability is good, and anti-hot and cold fragility is good, and tensile strength is higher, materials cost is cheap, and comprehensive Technological Economy is higher.
The present invention is a kind of low chromium medium-Si, Mo ferrite ductile cast iron alloy, it is characterized in that replacing with chromium the content of manganese partly.Cast iron alloy of the present invention, its Chemical Composition (calculating by weight percentage) is: C:2.0～3.0%; Si:4.5～6.0%; Mo:0.8～1.6%; Mn:0.06～0.17%; P:0.03～0.07%; S:0.004～0.02%; Re:0.04～0.07%; Mg:0.03～0.05%; All the other are Fe.
Molybdenum, manganese, chromium and silicon are that cast iron alloy of the present invention is in order to improve its high-temperature behavior, the main adding elements of anti-hot and cold fragility of raising and tensile strength.Improve the content of molybdenum in the alloy, the high temperature tensile strength and the heat-resistant anti-fatigue performance down of alloy improved, but the material cost of alloy is taken also increase thereupon simultaneously.Therefore, take all factors into consideration the Technological Economy of alloy, the content of molybdenum is advisable to be no more than 1.6% in the alloy.
Manganese plays desulfidation in alloy, reducing the content of manganese in alloy is that the present invention is in order to reduce alloy to the susceptibility of crackle and the main method that improves its anti-hot and cold fragility and improve its machining property.The content of manganese in alloy is the highest should not to surpass 0.17%.
Chromium in the present invention is in order to strengthening cast iron alloy resistance of oxidation at high temperature, and the content of chromium should be less than 0.2%, and still, the too high levels of chromium can cause forming free carbide and reduce processibility and other mechanical propertys of alloy.Therefore, the content of chromium is the highest should not surpass 0.4%.Equally, the present invention improves cast iron alloy resistance of oxidation at high temperature with the method for the content of raising silicon, but the too high levels of silicon can increase fragility, and therefore, the content of silicon is advisable with 4.5～6%.
The metallographic structure of this cast iron alloy is mainly ferrite, contains a spot of carbide, and graphite is spherical existence.
Fig. 1 is the present invention's metallographic structure photo under the as cast condition under 100 power microscopes
One embodiment of the present of invention are high-temperature resistance die materials, and its Chemical Composition and use properties are as follows:
Present embodiment is a high-temperature resistance die, is used to use superplastic forming to spread the part of the processing method manufacturing large titanium alloy sheet metal forming of connection.Mold weight reaches 0.5t, and in the part forming process, mould bore 900～950 ℃ temperature in lasting 12～13 hours, and the inflation pressurization continues 2～3 hours, and pressure is 15～17Pa.Mould uses repeatedly through four times, makes accessory size and still meets the requirements.Moulding stock is low chromium medium-Si, Mo ferrite ductile cast iron alloy, and its composition (weight percent) is: C:2.88%; Si:5.09%; Mo:1.46%; Mn:0.15%; Cr:0.34%; P:0.043%; S:0.007%; Mg is residual: 0.031%; Re is residual: 0.057%; All the other are Fe.
Cast iron alloy material of the present invention has high temperature tensile strength and resistance of oxidation preferably, high anti-hot and cold fragility and good creep-resistant property, and the favorable mechanical processing characteristics is arranged, weldability might as well, consider that from the complex art economic performance cast iron alloy of the present invention is specially adapted to be used as resistant to elevated temperatures moulding stock in development and small serial production can obtain higher technical economic benefit.
Claims (2)
1, a kind of medium-Si, Mo ferrite ductile cast iron is characterized in that replacing manganese partly with chromium.
2, medium-Si, Mo ferrite ductile cast iron according to claim 1 is characterized in that its Chemical Composition (calculating by weight percentage) is: C:2.0～3.0%; Si:4.5～6.0%; Mo:0.8～1.6%; Mn:0.06～0.17%; Cr:0.2～0.4%; P:0.03～0.07%; S:0.004～0.02%; Re:0.04～0.07%; Mg:0.03～0.05%; All the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107331 CN1051593A (en) | 1989-11-07 | 1989-11-07 | Low chromium medium-Si, Mo ferrite ductile cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107331 CN1051593A (en) | 1989-11-07 | 1989-11-07 | Low chromium medium-Si, Mo ferrite ductile cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1051593A true CN1051593A (en) | 1991-05-22 |
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ID=4857162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89107331 Pending CN1051593A (en) | 1989-11-07 | 1989-11-07 | Low chromium medium-Si, Mo ferrite ductile cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051593A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042657C (en) * | 1996-02-02 | 1999-03-24 | 清华大学 | Bainite Ductile Iron Grinding Ball |
| CN1313633C (en) * | 2005-05-17 | 2007-05-02 | 上海大学 | Hard hollow alloy ball iron mould material for vehicle mould and its making method |
| CN100529135C (en) * | 2004-11-22 | 2009-08-19 | 乔治·费希尔汽车股份公司 | Spheroidal cast alloy and method for producing cast parts from said spheroidal cast alloy |
| CN101886209B (en) * | 2009-05-15 | 2012-08-22 | 西峡县西泵特种铸造有限公司 | Medium silicon-molybdenum vermicular iron material |
| CN102888551A (en) * | 2012-10-30 | 2013-01-23 | 齐齐哈尔市精铸良铸造有限责任公司 | High-temperature-resistant antioxidant exhaust manifold nodular cast iron and preparation method thereof |
| CN103509992A (en) * | 2013-10-15 | 2014-01-15 | 沈阳工业大学 | Study and preparation of heat-resistant nodular cast iron |
-
1989
- 1989-11-07 CN CN 89107331 patent/CN1051593A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042657C (en) * | 1996-02-02 | 1999-03-24 | 清华大学 | Bainite Ductile Iron Grinding Ball |
| CN100529135C (en) * | 2004-11-22 | 2009-08-19 | 乔治·费希尔汽车股份公司 | Spheroidal cast alloy and method for producing cast parts from said spheroidal cast alloy |
| CN1313633C (en) * | 2005-05-17 | 2007-05-02 | 上海大学 | Hard hollow alloy ball iron mould material for vehicle mould and its making method |
| CN101886209B (en) * | 2009-05-15 | 2012-08-22 | 西峡县西泵特种铸造有限公司 | Medium silicon-molybdenum vermicular iron material |
| CN102888551A (en) * | 2012-10-30 | 2013-01-23 | 齐齐哈尔市精铸良铸造有限责任公司 | High-temperature-resistant antioxidant exhaust manifold nodular cast iron and preparation method thereof |
| CN103509992A (en) * | 2013-10-15 | 2014-01-15 | 沈阳工业大学 | Study and preparation of heat-resistant nodular cast iron |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |