CN1042193A - High-chromium alloy cast-iron and thermal treatment process thereof and application - Google Patents
High-chromium alloy cast-iron and thermal treatment process thereof and application Download PDFInfo
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- CN1042193A CN1042193A CN 89108897 CN89108897A CN1042193A CN 1042193 A CN1042193 A CN 1042193A CN 89108897 CN89108897 CN 89108897 CN 89108897 A CN89108897 A CN 89108897A CN 1042193 A CN1042193 A CN 1042193A
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- iron
- thermal treatment
- chromium alloy
- alloy cast
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- 238000007669 thermal treatment Methods 0.000 title claims abstract description 23
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 21
- 229910000599 Cr alloy Inorganic materials 0.000 title claims abstract description 20
- 239000000788 chromium alloy Substances 0.000 title claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000009785 tube rolling Methods 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000010583 slow cooling Methods 0.000 claims abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 21
- 150000002910 rare earth metals Chemical class 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 238000012999 compression bending Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical class Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to a kind of high-chromium alloy cast-iron and unique thermal treatment process thereof of antiwear heat resisting, and this material is used to make the tube rolling mill top.The composition of invention material is (weight percent): C2.85～3.40, Si0.80～1.50, Mn0.30～0.40, S＜0.02, P＜0.03, Cr25～38, Ni3～8, RE0.08～0.15, and surplus is an iron.Carry out twice thermal treatment, primary temperature is 1100～1300 ℃, the back air cooling of coming out of the stove; Secondary temperature is 1000～1250 ℃, slow cooling.The present invention according to the particular requirement appropriate design of instruments such as tube rolling mill top, guide plate of perforating machine, parts composition and technology, brought into play the good action of rare earth.
Description
The height that the present invention relates to a kind of antiwear heat resisting irons cast alloy iron, and the thermal treatment process of this high-chromium alloy cast-iron, and this material is used to make tube rolling mill with coming directly towards.
High-chromium alloy cast-iron is a kind of good high-abrasive material, and its range of application constantly enlarges, and kind, specification and expense increase.The development of rich chromium cast iron will be selected alloy ingredient according to the service condition and the performance requriements of concrete parts, formulates its production technique, particularly thermal treatment process.
In industries such as metallurgy, some bodies, instrument, liner plate etc. are arranged, not only requiring has high wear resistance, and high thermotolerance will be arranged.In hot rolled seamless steel tube production, very heavy working stress is undertaken in the top of tube rolling mill, and heated metal is surrounded again, and service condition is very abominable.The top is the key instrument that tube rolling quality and tube rolling productivity is all had great effect, requires material that good wear resistance, hardness, intensity and flexible rational Match are at high temperature arranged, and metallographic structure in using, performance do not change.Particularly domestic producers because the layout of tapping machine and tube rolling mill is not too appropriate, cause steel pipe temperature when entering tube rolling mill on the low side, have strengthened the working load of top, and are harsher to the requirement of top material capability.And for example guide plate of perforating machine also is one of main stressed member, very easily wearing and tearing.Pipe high speed rotating under the roll effect advances, rotational pressure, extending pressure and frictional force effect when guide plate is subjected to the pipe distortion, and it is worth 30% of suitable rolling load.Be heated to the pipe more than 1250 ℃ during perforation, rotate on guide plate and advance, produce high temperature friction, the instantaneous temperature of its contact part can be raised to about 500～1000 ℃.In addition, also to bear repeatedly chilling and shock heating.So the guide plate material also must have excellent high-temperature hardness, hot strength, high-temperature oxidation resistance, wear resistance and anti-chilling and shock heating etc.
Rare earth element is effective alterant.Studies have shown that, rare earth can also can make carbide more be tending towards the upright bulk of arc by refinement primary austenite dendrite, help the raising of toughness and resistance to compression bending strength, the rare earth that is added has certain solubleness in matrix, cause lattice distortion after being dissolved in austenite, and hardness is increased, add rare earth in the high-chromium alloy cast-iron, also can improve the alloy high-temp mechanical property, increase resistance of oxidation, and grain coarsening when stoping high temperature.China's rare earth resources is abundant, should note bringing into play the effect of rare earth in high-chromium alloy cast-iron.Commercial name is called West Germany's high-chromium alloy cast-iron of Panfanax, and its composition is (weight percent): C2.6～3.1, Si0.8～1.2, and Mn0.7～1.0, Cr27.0～30.0, Ni2.0～2.3 wherein do not add rare earth element.Deutsches Wirtschafts Patent document DL140362 has reported the cast alloy iron (weight percent) of following composition: C3～3.5, and Si0.6～1.5, Mn0.8～1.5, Cr23～27, Ni3～3.5, Ti0.6～1 does not wherein add rare earth element yet.
The hardness of high-chromium alloy cast-iron is relevant with chromium content with carbon.Increase carbon content and help to improve hardness, because enough carbon amounts are arranged, just can make has enough carbide reinforced phases in the alloy.Chromium does not still improve the effective elements of cast alloy iron antioxidant property, and is again the strong carbide forming element, increases with chrome content, and chromium carbide becomes M
7C
3And M
23C
6Type, thereby can improve resistance to abrasion, thermostability under the heavy burden." the rare-earth and high chromium high-temperature refractory steel, " of Chinese patent literature CN86106715A report though contain rare earth element and Cr30～36, Ni7～10(weight percent etc., carbon content only is 0.6～1.0.The rich chromium cast iron of Chinese patent literature CN87104467 report contains rare earth element, carbon containing 1.5～2.5%, but chrome content only is 5～15%.Above-mentioned material does not all meet the requirement of parts such as making tube rolling mill top, guide plate of perforating machine, instrument.
Tube rolling mill top, guide plate of perforating machine material C r32NiS, Cr15Ni2 commonly used at present do not contain rare earth metal, and they are shorter following work-ing life in the harsh especially situation of working conditions.
The objective of the invention is to overcome the shortcoming of prior art, be instruments such as tube rolling mill top, parts provide a kind of suitable its concrete service condition needs, high-wearing feature and stable on heating is arranged, be added with the high-chromium alloy cast-iron of rare earth element, increasing the service life, and provide its thermal treatment process and purposes.
The component of high-chromium alloy cast-iron of the present invention is (weight percent): C2.85～3.40, Si0.80～1.50, Mn0.30～0.40, S＜0.02, P＜0.03, Cr25～38, Ni3～8, RE0.08～0.15, and surplus is Fe.
The effect of carbon, chromium and rare earth has been previously described.Nickel can improve hardening capacity, and forms stable austenite structure under as cast condition, also limits the pearlitic structure that wears no resistance and produces, and nickel at high temperature also plays stable austenite simultaneously, can improve sosoloid intensity, can improve the toughness and the thermal fatigue of steel again.Suitable manganese amount and thermal treatment can improve resistance to abrasion and impelling strength.The silicon solid solution adds a certain amount of silicon and can prevent the intergranular be full of cracks in austenite, improves antioxidant property, increases the hardness and the intensity of sosoloid.
The thermal treatment process of high-chromium alloy cast-iron of the present invention is: carry out twice thermal treatment, thermal treatment temp is 1100 ℃～1300 ℃ for the first time, is incubated and comes out of the stove air cooling to room temperature after 3～8 hours.Heat treated purpose is the carbide of refinement cast structure for the first time.See Fig. 1 through structure after the thermal treatment for the first time.For the second time thermal treatment temp is 1000 ℃～1250 ℃, is incubated after 2～5 hours slow cooling to room temperature.The method of slow cooling is furnace cooling preferably.Heat treated purpose is to make to separate out tiny carbide particle in the austenite substrate for the second time, to improve workpiece thermotolerance, hardness, intensity and toughness at high temperature.See Fig. 2 through the structure after the thermal treatment for the second time, be austenite+M
7C
3+ M
23C
6, macrohardness is HRC50～55.(etchant of metallographic specimen is the iron chloride salt aqueous acid: iron trichloride 5 grams, 50 milliliters of hydrochloric acid, 100 milliliters in water).
During melting high-chromium alloy cast-iron of the present invention, use aluminium deoxidation, a part of rare earth adds in the stove, and another part rare earth adds in the hot metal ladle.Teeming temperature is controlled at 1550 ℃～1650 ℃.
Advantage of the present invention and positively effect are: according to instrument, the high-wearing feature of parts, thermotolerance particular requirements such as tube rolling mill top, guide plate of perforating machine, appropriate design alloying constituent and thermal treatment process, brought into play the good action of rare earth element, can improve the work-ing life of instrument parts greatly, become a kind of having an economic benefit and the novel material of social benefit.
Embodiment 1: the high-chromium alloy cast-iron (weight percent) of the following component of 5 stoves is refined in congruent melting: C2.85～3.1, and Si0.80～1.10, Mn0.30～0.40, S＜0.02, P＜0.03, Cr28～33, Ni4～6, RE0.08～0.12, surplus is Fe.
During smelting operation, by requirement of material chemical ingredients and the actual chemical ingredients of raw material, calculate required various proportion of raw materials, with ferrochrome (lumpiness less than 50 * 100 * 150mm), the nickel plate (lumpiness less than 10 * 50 * 100mm), (lumpiness is less than 50 * 50 * 100mm) for steel scrap, (lumpiness waits raw material to add intermediate frequency furnace in proportion (along with the carrying out of melting process less than 30 * 30 * 30mm) to carbon in batches, add, till adding) in batches.After the raw material fusing finishes, be incubated ten minutes, add ferrosilicon in proportion, use SiO
2Remove slag.After five minutes, a part of rare earth adds in the stove with the aluminum strip deoxidation, and main purpose is a purifying molten iron.After 15 minutes, other a part of rare earth is added the interior molten iron interior with pouring bag of hot metal ladle fully stir well, play effects such as changing carbide volume, form, distribution and crystal grain thinning.
Adopt the cast of many casees stacking, the cast workpiece is the tube rolling mill top.25～35 seconds durations of pouring, can not be interrupted.Because rationally the add-on of control carbon and rare earth has reduced the gas in the molten iron, strengthened molten iron flowability, improved the top yield rate.Pouring the back insulation unpacked more than 10 hours.
From the cast blank of five stove high-chromium alloy cast-irons top, get 64 ball tops of being processed into φ 64.4mm, all the other blanks are according to producing the ball top that needs are processed into φ 63.8mm～φ 65.0mm, and after all heat-treating by thermal treatment process of the present invention, installation is used under actual production conditions.The tracking test result: 64 new matter top tube rolling amounts are 610.65 tons, 9.54 tons of average every top tube rollings, (poling machine and tube rolling mill are the diagonal lines arrangement for 3.18 times of 3 tons of every tube rolling amounts in old material top, steel pipe temperature when entering tube rolling mill is on the low side, be about 650～950 ℃, the top working conditions is most evil bad).The chemical ingredients of old material top is (weight percent): C1.8～2.2, Si0.3～0.5, Ni3～6, Cr30～34, surplus is Fe except that S, P.
Embodiment 2: the high-chromium alloy cast-iron (weight percent) of the following component of 9 stoves is refined in congruent melting: C2.905～3.280, Si0.904～1.330, Mn0.32～0.34, S＜0.02, Cr33.94～35.38, Ni5.803～6.675, RE0.080～0.130, surplus are iron.
Smelting operation, cast is identical with embodiment 1 with thermal treatment.Done 130 balls top, the tube rolling amount is 1183 tons, and 9.1 tons of average every top tube rollings are 3.03 times of old material top.
Claims (5)
1, a kind of high-chromium alloy cast-iron of antiwear heat resisting is characterized in that its composition is (weight percent): C2.85～3.40, Si0.80～1.50, Mn0.30～0.40, S＜0.02, P＜0.03, Cr25～38, Ni3～8, RE0.08～0.15, surplus is an iron.
2, high-chromium alloy cast-iron as claimed in claim 1, the composition that it is characterized in that it is (weight percent): C2.85～3.30, Si0.80～1.33, Mn0.30～0.40, S＜0.02, P＜0.03, Cr28～35.38, Ni4～6.68, RE0.08～0.13, and surplus is an iron.
3, the thermal treatment process of high-chromium alloy cast-iron as claimed in claim 1, it is characterized in that: carry out twice thermal treatment, thermal treatment temp is 1100 ℃～1300 ℃ for the first time, be incubated and come out of the stove air cooling to room temperature after 3～8 hours, for the second time thermal treatment temp is 1000～1250 ℃, is incubated after 2～5 hours slow cooling to room temperature.
4, thermal treatment process as claimed in claim 3 is characterized in that: the mode of the slow cooling of thermal treatment for the second time is a furnace cooling.
5, high-chromium alloy cast-iron as claimed in claim 1 or 2 is characterized in that being used to make the tube rolling mill top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89108897 CN1024690C (en) | 1989-11-23 | 1989-11-23 | High-chromium alloy cast iron and heat treatment process and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89108897 CN1024690C (en) | 1989-11-23 | 1989-11-23 | High-chromium alloy cast iron and heat treatment process and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042193A true CN1042193A (en) | 1990-05-16 |
| CN1024690C CN1024690C (en) | 1994-05-25 |
Family
ID=4857785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89108897 Expired - Fee Related CN1024690C (en) | 1989-11-23 | 1989-11-23 | High-chromium alloy cast iron and heat treatment process and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024690C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064413C (en) * | 1996-11-21 | 2001-04-11 | 冶金工业部北京冶金设备研究院 | Multicomponent alloy cast steel with excellent steel bulk resisting property |
| CN1069929C (en) * | 1998-10-27 | 2001-08-22 | 朱同家 | Superhigh-chrome wear-resistant white cast iron and its production process |
| CN100455378C (en) * | 2006-12-21 | 2009-01-28 | 安徽省安工机械制造有限公司 | Method for manufacturing high chromium white wear-resistant cast iron |
| CN101279522B (en) * | 2008-04-25 | 2012-01-04 | 西安交通大学 | Shock resistant compound material and preparation thereof |
| CN101619469B (en) * | 2009-04-22 | 2012-09-05 | 兰州连城陇兴铝业有限责任公司 | Crust-hitting hammer head for aluminum reduction cell and casting technique thereof |
| CN106222580A (en) * | 2016-08-22 | 2016-12-14 | 合肥东方节能科技股份有限公司 | A kind of high finishing mill slitting wheel alloy material and preparation method thereof |
| CN110257697A (en) * | 2019-07-16 | 2019-09-20 | 安徽海螺川崎装备制造有限公司 | A kind of grate-cooler grate plate high abrasion heat resistance casting and its casting technique |
-
1989
- 1989-11-23 CN CN 89108897 patent/CN1024690C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064413C (en) * | 1996-11-21 | 2001-04-11 | 冶金工业部北京冶金设备研究院 | Multicomponent alloy cast steel with excellent steel bulk resisting property |
| CN1069929C (en) * | 1998-10-27 | 2001-08-22 | 朱同家 | Superhigh-chrome wear-resistant white cast iron and its production process |
| CN100455378C (en) * | 2006-12-21 | 2009-01-28 | 安徽省安工机械制造有限公司 | Method for manufacturing high chromium white wear-resistant cast iron |
| CN101279522B (en) * | 2008-04-25 | 2012-01-04 | 西安交通大学 | Shock resistant compound material and preparation thereof |
| CN101619469B (en) * | 2009-04-22 | 2012-09-05 | 兰州连城陇兴铝业有限责任公司 | Crust-hitting hammer head for aluminum reduction cell and casting technique thereof |
| CN106222580A (en) * | 2016-08-22 | 2016-12-14 | 合肥东方节能科技股份有限公司 | A kind of high finishing mill slitting wheel alloy material and preparation method thereof |
| CN110257697A (en) * | 2019-07-16 | 2019-09-20 | 安徽海螺川崎装备制造有限公司 | A kind of grate-cooler grate plate high abrasion heat resistance casting and its casting technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024690C (en) | 1994-05-25 |
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