CN1335417A - High-temperature antiwear alloy steel and its production process - Google Patents
High-temperature antiwear alloy steel and its production process Download PDFInfo
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- CN1335417A CN1335417A CN 00113555 CN00113555A CN1335417A CN 1335417 A CN1335417 A CN 1335417A CN 00113555 CN00113555 CN 00113555 CN 00113555 A CN00113555 A CN 00113555A CN 1335417 A CN1335417 A CN 1335417A
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Abstract
The high temperature antiwear alloy steel is produced with waste steel, high carbon chromium iron, molybdenum iron, titanium iron, Zr, Al, RE element in certain proportion and proper amount of Si-Mn deoxidant and through the technological processes of smelting, diffusion annealing, nodularization annealing, quenching, twice tempering, etc. Owing to the multielement alloying, melt purification, heat treatment reinforcing and structure thinning, the present invention has high heat stability and antiwear property, fine and homogeneously distributed crystal and carbide, and excellent comprehensive performance. The present invention is one ideal material for manufacturing guide and guard wheel and roller.
Description
The present invention relates to a kind of ferrous alloy and production method thereof, particularly a kind of high-temperature antiwear alloy steel and production method thereof.
The employed roll of steel rolling production-line in the iron and steel metallurgical industry, guide and guard wheel and foreplate run in very abominable high temperature and the wear working condition environment, surpass 100 meter per seconds as its roll speed of high-speed rod machine, and the maximum operating temperature of being heated reaches 1000～1100 ℃.Because the wear out failure of roll and guide and guard wheel causes and changes frequently, therefore not only high temperature resistant the but also anti abrasive material of research is one of steel rolling industry problem demanding prompt solution.At present, at home owing to there is not the appearance of new type high temperature high-abrasive material, and often use pure high-temperature alloy steel and simple high-abrasive material.Though the former has the good temperature resistance energy, wear resistance is not enough; Though the latter then has very high room temperature wear resisting property, along with the raising of working temperature, its wear resistance descends rapidly again, thereby causes the premature failure of material.In the world, industrialized country pays much attention to the research and development of ferrous materials, " the super-steel plan " that Japan started in 1997, and exploitation is equivalent to existing ferrous materials two dual intensities and novel ferrous materials of the STX-21 in life-span and ultra-high purity iron exactly; But at present, the research report of relevant high-temperature and wear-proof then seldom, to the research of such material, often adopt the superior alloy steel of high-cleanness, high, ultra micro refinement, by microalloying, thermal treatment and the special process for treating surface of high-abrasive material being improved the over-all properties of heat-resistant and wear-resistant material.Usually the process for treating surface that adopts has spraying, surface heat processing, chemical conversion treatment, vapour deposition, Laser Surface Treatment etc., and is numerous.In a word, still be in the stage in the ascendant aspect research, exploitation and the production of roll, guide and guard wheel material abroad.
Purpose of the present invention is that a kind of not only high temperature resistant but also anti abrasive steel alloy and production method thereof that is particularly suitable for as the material of making roll, guide and guard wheel etc. is provided.
Solution of the present invention is as follows.This high-temperature antiwear alloy steel is to adopt the raw material of following component and weight percentage to make by melting and other technical process production: 77.5～79% steel scrap, 18.3～20.7% high carbon ferro-chrome, 0.67～1.0% molybdenum-iron, 0.33～0.5% vanadium iron, an amount of silicon, the manganese reductor, 0.05～0.1% ferrotianium, 0.02～0.05% zirconium, 0.6～1.2% aluminium and 0.12～0.5% rare earth element, the steel alloy carbon containing 1.45～1.70% that makes like this, contain chromium 11.0～12.5%, contain molybdenum 0.4～0.6%, contain vanadium 0.15～0.30%, titaniferous 0.02～0.05%, contain zirconium 0.02～0.05%, contain aluminium 0.6～1.2%, contain rare earth element 0.05～0.15%.
The producing and manufacturing technique of high-temperature antiwear alloy steel of the present invention is: (1) melting: will pack into by steel scrap, high carbon ferro-chrome and the molybdenum-iron of determining the content preparation earlier and carry out melting in the intermediate frequency furnace, at vanadium iron that in stove, add to determine content in preceding 7～10 minutes and an amount of silicon, the manganese reductor of coming out of the stove, add at last then by ferrotianium, zirconium, aluminium and the rare earth element of determining the content preparation; (2) annealing: the alloy steel piece that carries out sand mold cast gained by the workpiece moulding after the melting is annealed at twice, be to spread homogenizing annealing for the first time at 1050～1150 ℃, be incubated 6～8 hours, furnace cooling then, its objective is and eliminate chemical segregation, promptly be to make the inner chemical ingredients of product reach certain homogenizing by diffusion, the austenite bone is eliminated to greatest extent, be annealed into for the second time Spheroidizing Annealing, alloy steel piece is warming up to 850～870 ℃ with stove, is incubated and cools to 720～750 ℃ with the furnace after 2～4 hours, is incubated 6 hours again, be chilled to 500 ℃ with stove and come out of the stove, air cooling is to room temperature; (3) quench: the alloy steel piece of anneal gained is carried out quench treatment after thick machining, quenching temperature is got 980～1020 ℃, and soaking time is decided on batch and workpiece, and miniature workpiece adopts air cooling, and large-scale workpiece can adopt forces cooling; (4) tempering: will carry out temper more than twice through the alloy steel piece after the quench treatment, to eliminate quenching stress, temperature is chosen between 180～250 ℃, avoids the temper brittleness interval, make the product over-all properties after the processing better, hardness is between HRC58～62.
The steel alloy that the present invention produces is on the prototype of wear resisting property excellence, quenching strain is little, hardening capacity is good Cr12MOV die steel, particular requirement at roll, guide and guard wheel etc., adopt multi-element alloyed approach, the an amount of trace alloying elements such as titanium, zirconium, aluminium and rare earth element that add improve its thermostability and wear resisting property.The effect of the contained alloying element of this steel alloy is respectively:
Chromium: chromium improves hardenability and hardening capacity in steel alloy, this steel alloy contains about 12%Cr, and it is about 1.45～1.70% to contain C, proportionately belongs to Ledeburitic steel, has a large amount of M in the steel
7Ca type carbide, its wear resistance is than M
3C and M
6C type carbide amount is many, though wear resisting property is improved beneficial, but because the distribution of carbides ununiformity is big, intensity and toughness can slightly reduce, therefore chrome content should not surpass 1 2.5% in this steel alloy, carbon content is advisable with 1.45～1.70%, and carbon content is on the low side, and then hardness and wear resistance can reduce.
Molybdenum: molybdenum content in steel is 0.4～0.6%, and molybdenum can the refinement carbide, stops crystal to be grown up, and can effectively improve the hardening capacity of steel.
Vanadium: vanadium contains at 0.1～0.2% o'clock in steel, can generate VC, and when thermal treatment, VC dissolves seldom, so vanadium more can stop austenite crystal to be grown up than other element effectively, reduce superheated susceptivity, simultaneously, also can increase its wear resistance, improve red hardness, increase thermostability.
Titanium: adding a little amount of titanium (0.06～0.12%) in steel alloy can crystal grain thinning, improve toughness and reduce cold short tendency, can stop grain growth during heating, titanium is a carbide forming element simultaneously, to improving hardness good action is arranged, general addition is advisable to be not more than 0.05%.
Zirconium: but zirconium adds crystal grain thinning in the steel alloy, and its effect is identical with titanium.
Aluminium: aluminium element mainly is the high-temperature oxidation resistance that improves wear resisting steel in steel alloy, improves the thermostability of steel alloy.Aluminium is the element that generates nitride in steel, can improve the red hardness of steel alloy; Aluminium also is the effective alloying element of antioxidant property that improves steel, normally adds simultaneously in the steel with Cr, forms one deck stable oxide film on the steel surface, and its antioxidant property is better, thereby can improve the thermostability of steel alloy.The addition of aluminium is generally in 0.6～1.0% scope.
Rare earth element: rare earth element has the intensive deoxidizing capacity, avidity to oxygen is also very big, very strong desulfuration ability is arranged simultaneously, can also improve the shape of non-metallic inclusion, make it nodularization, the rare earth metal of adding minute quantity such as cerium (Ce), lanthanum (La) equal in the high temperature steel, can significantly improve its antioxidant property.These effects of rare earth element can make the steel alloy melt be purified, and improve the toughness and the mechanical property of steel, reduce brittle transition temperature.The addition of rare earth element is generally less than 0.2%.
In a word, the present invention can significantly improve the thermostability and the wear resisting property of steel alloy by polynary a small amount of alloying, cleaning molten, heat treatment reinforcement and structure refinement, and makes grain refining, grain fineness number reach 9.5～10.5 grades, and carbide is tiny and be evenly distributed.High-temperature antiwear alloy steel of the present invention has excellent comprehensive performances, and its hardness is 62.5HRC, tensile strength sigma
bBe 1962MPa, impelling strength ak is 2.419J/cm
2, in the time of 1000 ℃, the heat etching weight loss rate is 0.245g/m
2.h, frictional wear weightlessness is 30mg under 75N load, shows that this steel alloy when having excellent wear-resisting property and resistance to elevated temperatures, has good intensity and toughness concurrently, so its can yet be regarded as ideal material of high-temperature wearable guide and guard wheel and roll etc.
Embodiment: 234.5kg steel scrap, 60kg high carbon ferro-chrome and 3kg molybdenum-iron packed into carry out melting in the intermediate frequency furnace, at preceding 8 minutes adding 1.5kg vanadium iron and an amount of manganese reductors in stove of coming out of the stove, add 0.3kg ferrotianium, 0.3kg zirconium, 3kg aluminium, 0.75kg cerium and lanthanum at last then; To anneal at twice by the guide and guard wheel alloy steel part of guide and guard wheel workpiece moulding carrying out sand mold cast gained after the melting, be to spread homo genizing annelaing for the first time at 1100 ℃, be incubated 7 hours, furnace cooling is a Spheroidizing Annealing for the second time then, and guide and guard wheel alloy steel part is warming up to 860 ℃ with stove, be incubated and cool to 730 ℃ with the furnace after 3 hours, be incubated 6 hours again, be chilled to 500 ℃ with stove and come out of the stove, air cooling is to room temperature; The guide and guard wheel alloy steel part of clean anneal gained carries out quench treatment after roughing, quenching temperature is got 1000 ℃, and soaking time is 0.5～1 hour, and air cooling is to room temperature; Guide and guard wheel alloy steel part after quench treatment is carried out the double tempering processing, and temperature is elected 220 ℃ as; At last, by precision work guide and guard wheels is machined to and meets the drawing requirement.
Claims (3)
1, a kind of high-temperature antiwear alloy steel, it is characterized in that, it is to adopt the raw material of following component and weight percentage to make by melting and other technical process production: 77.5～79% steel scrap, 18.3～207% high carbon ferro-chrome, 0.67～1.0% molybdenum-iron, 0.33～0.5% vanadium iron, an amount of silicon, the manganese reductor, 0.05～0.1% ferrotianium, 0.02～0.05% zirconium, 0.6～1.2% aluminium and 0.12～0.5% rare earth element, the steel alloy carbon containing 1.45～1.70% that makes like this, contain chromium 11.0～12.5%, contain molybdenum 0.4～0.6%, contain vanadium 0.15～0.30%, titaniferous 0.02～0.05%, contain zirconium 0.02～0.05%, contain aluminium 0.6～1.2%, contain rare earth element 0.05～0.15%
2, a kind of production method of high-temperature antiwear alloy steel according to claim 1 is characterized in that:
(1) melting: will pack into by steel scrap, high carbon ferro-chrome and the molybdenum-iron of determining the content preparation earlier and carry out melting in the intermediate frequency furnace, at vanadium iron that in stove, add to determine content in preceding 7～10 minutes and an amount of silicon, the manganese reductor of coming out of the stove, add at last then by ferrotianium, zirconium, aluminium and the rare earth element of determining the content preparation;
(2) annealing: the alloy steel piece that carries out sand mold cast gained by the workpiece moulding after the melting is annealed at twice, be to spread homogenizing annealing for the first time at 1050～1150 ℃, be incubated 6～8 hours, furnace cooling is annealed into Spheroidizing Annealing for the second time then, and alloy steel piece is warming up to 850～870 ℃ with stove, be incubated and cool to 720～750 ℃ with the furnace after 2～4 hours, be incubated 6 hours again, be chilled to 500 ℃ with stove and come out of the stove, air cooling is to room temperature;
(3) quench: the alloy steel piece of anneal gained is carried out quench treatment after thick machining, quenching temperature is got 980～1020 ℃, and soaking time is decided on batch and workpiece, and miniature workpiece adopts air cooling, and large-scale workpiece can adopt forces cooling;
(4) tempering: will carry out temper more than twice through the alloy steel piece after the quench treatment, temperature is chosen between 180～250 ℃.
3, high-temperature antiwear alloy steel according to claim 1 is characterized in that, rare earth element is selected cerium, lanthanum for use.
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| CN 00113555 CN1335417A (en) | 2000-07-21 | 2000-07-21 | High-temperature antiwear alloy steel and its production process |
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| CN 00113555 CN1335417A (en) | 2000-07-21 | 2000-07-21 | High-temperature antiwear alloy steel and its production process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747304A (en) * | 2012-06-23 | 2012-10-24 | 昆明嘉和科技股份有限公司 | Corrosion-resistant abrasion-resistant alloy material and preparation method thereof |
| CN106011444A (en) * | 2016-08-03 | 2016-10-12 | 成都三强轧辊股份有限公司 | H-section steel roll collar heat treatment technology |
| CN106282727A (en) * | 2016-08-29 | 2017-01-04 | 桂林新艺制冷设备有限责任公司 | A kind of high-abrasive material |
| CN110257691A (en) * | 2019-07-31 | 2019-09-20 | 沛县祥龙矿山机械配件有限公司 | A kind of production technology for power plant heat resisting steel band |
| CN115418552A (en) * | 2022-08-25 | 2022-12-02 | 齐齐哈尔英格机械有限公司 | Method for preparing nitrocarburizing low-alloy steel machine tool friction plate |
| CN117126996A (en) * | 2023-10-26 | 2023-11-28 | 东方蓝天钛金科技有限公司 | Heat treatment method for GH2132 alloy blind rivet sleeve |
-
2000
- 2000-07-21 CN CN 00113555 patent/CN1335417A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747304A (en) * | 2012-06-23 | 2012-10-24 | 昆明嘉和科技股份有限公司 | Corrosion-resistant abrasion-resistant alloy material and preparation method thereof |
| CN106011444A (en) * | 2016-08-03 | 2016-10-12 | 成都三强轧辊股份有限公司 | H-section steel roll collar heat treatment technology |
| CN106282727A (en) * | 2016-08-29 | 2017-01-04 | 桂林新艺制冷设备有限责任公司 | A kind of high-abrasive material |
| CN110257691A (en) * | 2019-07-31 | 2019-09-20 | 沛县祥龙矿山机械配件有限公司 | A kind of production technology for power plant heat resisting steel band |
| CN115418552A (en) * | 2022-08-25 | 2022-12-02 | 齐齐哈尔英格机械有限公司 | Method for preparing nitrocarburizing low-alloy steel machine tool friction plate |
| CN115418552B (en) * | 2022-08-25 | 2023-09-22 | 齐齐哈尔英格机械有限公司 | Preparation method of nitrocarburizing low alloy steel machine tool friction plate |
| CN117126996A (en) * | 2023-10-26 | 2023-11-28 | 东方蓝天钛金科技有限公司 | Heat treatment method for GH2132 alloy blind rivet sleeve |
| CN117126996B (en) * | 2023-10-26 | 2024-01-02 | 东方蓝天钛金科技有限公司 | Heat treatment method for GH2132 alloy blind rivet sleeve |
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