CN1699613A - High strength abrasion resistant steel and method for producing the same - Google Patents
High strength abrasion resistant steel and method for producing the same Download PDFInfo
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- CN1699613A CN1699613A CN 200510078257 CN200510078257A CN1699613A CN 1699613 A CN1699613 A CN 1699613A CN 200510078257 CN200510078257 CN 200510078257 CN 200510078257 A CN200510078257 A CN 200510078257A CN 1699613 A CN1699613 A CN 1699613A
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Abstract
The present invention relates to a high strength and wear resistant steel and its production process, which is particularly suitable for application in railway intersections. The compositions (wt%) are : C 0.25-0.55, Si 0.6-1.5,Mn 0.8-1.5,Cr 1-1.5,Mo 0.3-0.5, V 0.15-0.25, Ti 0.05-0.15, P<=0.03, S<=0.025. The production flow sheet is as follows: refining by arc furnace - refining by vacuum furnace - ladle refining outside of furnace - casting ingot - primary rolling in billet - forging in form - deforming heat treatment. As compared with the existing technologies, the present steel has the advantages of excellent wear resistance, high strength, high toughness, stable quality and low production cost.
Description
Technical field
The present invention relates to steel alloy, is a kind of high-strength abrasion-proof steel and manufacture method thereof that can be used for railway switch specifically.
Background technology
Along with transportation by railroad to heavy duty and high speed development, the material and the inner quality of railway are had higher requirement.The high mangaenese steel track switch of active service more and more is difficult to satisfy the needs of transportation by railroad heavy duty high speed development, the abominable road frog rail of service condition particularly, not only enough wear resistancies to be arranged, and require that enough strong, toughness are arranged, should have stable inner quality simultaneously.For this reason, all trying hard to develop the high-performance abrasion-proof steel that can satisfy Heavy-Haul Railway rapid transit requirement both at home and abroad, for example application number is 98112095.4 high-performance abrasion-resistant steel for switch tongue of high-speed or quasi high-speed railway, adopt Si-Mn-Cr-Mo-Ni principal series alloying element, the over-all properties of its wear resisting steel increases.But the adding that experiment showed, principal series alloying element Ni is to improving the DeGrain of wear resisting steel performance, and because the Ni alloy material costs an arm and a leg, also can cause the increase of wear resisting steel production cost.In addition,, particularly lack the measure that removes obnoxious flavour hydrogen, cause the hydrogen of formation accumulative possibility being arranged, transportation by railroad is constituted the greatly delayed cracking phenomenon of harm thereby product is existed in product inside because the wear resisting steel manufacturing processed lacks refining procedure.
Summary of the invention
The objective of the invention is at the problems referred to above, provide a kind of intensity height, the high-strength abrasion-proof steel that wear resistance is good and production cost is low.This high-strength abrasion-proof steel is specially adapted to railway switch.
The present invention also aims to provide a kind of and can guarantee effectively that this high-strength abrasion-proof steel has the manufacture method of stable inner quality.
The technical scheme that realizes the object of the invention is: a kind of high-strength abrasion-proof steel, and its Chemical Composition (weight %) is:
C?0.25-0.55 Si?0.6-1.5 Mn?0.8-1.5 Cr?1-1.5 Mo?0.3-0.5
V?0.15-0.25 Ti?0.05-0.15 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
The preferred Chemical Composition of high-strength abrasion-proof steel of the present invention (weight %) is:
(1)C?0.25-0.35 Si?0.6-0.9 Mn?0.8-1.2 Cr?1-1.2 Mo?0.3-0.4
V?0.15-0.2 Ti?0.05-0.09 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
(2)C?0.28-0.4 Si?0.8-1.2 Mn?1.1-1.5 Cr?1.2-1.5 Mo?0.4-0.5
V?0.18-0.25 Ti?0.06-0.1 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
(3)C?0.3-0.48 Si?0.6-0.8 Mn?0.9-1.2 Cr?1.1-1.3 Mo?0.3-0.4
V?0.18-0.24 Ti?0.08-0.12 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
The manufacture method of high-strength abrasion-proof steel of the present invention is to adopt following technical process:
Outer ladle refining → the ingot casting of electric arc furnace smelting → vacuum oven refining → stove → just roll into base → forging molding → thermomechanical treatment.
The carbon content of high-strength abrasion-proof steel of the present invention is controlled between the 0.25-0.55, to guarantee that material has good stretching, reverses, bending property, obtains good obdurability material.The adding of alloying element Si, Mn, Cr, Mo, V, Ti and properly mixed selection can effectively suppress austenitic recrystallize, the residence time before quenching after the prolongation deformation, and crystal grain thinning, the intensity and the plasticity and toughness of raising material.
The acting as of each operation in its high-strength abrasion-proof steel manufacturing process flow:
Electric arc furnace smelting: Chemical Composition is adjusted in control, by slagging process rough purification molten steel.
The vacuum oven refining: the molten steel that composition behind the electric arc furnace smelting is qualified is poured in the vacuum oven, and the refining of bleeding fully removes the obnoxious flavour in the molten steel.
The outer ladle refining of stove: the molten steel behind the vacuum suction is poured into after the ladle, carried out ladle again and blow the hydrogen refining, the various detrimental impurity in the steel are fully floated, obtain final purify hot metal.
Ingot casting: the pouring molten steel of final purification is become ingot or continuously cast bloom, for rolling ready.
Just roll into base: steel ingot or continuously cast bloom are rolled into the strip steel billet, ready for forging.
Forging molding: with the bloom blanking, the heats forged moulding.
Thermomechanical treatment: the forging that will forge aftershaping utilizes its waste heat to carry out controlled chilling, tissue that obtains expecting and performance.
The present invention has following advantage compared to existing technology:
1, has good wear resisting property and high strength, high tenacity index.
2, has stable inner quality.
3, production cost is low.
Embodiment
Main raw material(s) is prepared:
The A3 steel scrap does not have serious corrosion,
High carbon ferro-chrome FeCr67C6.0
Mid-carbon fe-mn FeMn80C1.5
Ferrosilicon FeSi75-A
Molybdenum-iron FeMo60-A
Vanadium iron FeV75-A
Ferrotianium FeTi30-A
By the outer ladle refining → ingot casting of electric arc furnace smelting → vacuum oven refining → stove → just roll into base → forging molding → thermomechanical treatment technological process to produce railway switch heart rail.
Embodiment one
Chemical Composition and content are in following ratio proportioning (weight %):
C?0.27、Si?0.8、Mn?1.0、Cr?1.1、Mo?0.35、V?0.17、Ti?0.09、P≤0.03、S≤0.025。
Behind the deformation oil quenching,, obtain the tempered sorbite tissue in 480 tempering.
Mechanical property is as follows:
Intensity σ
b=1410Mpa, hardness HRC=43, impelling strength α
Ku=51J/cm
2, unit elongation δ
5=10%.
Embodiment two
Chemical Composition and content are in following ratio proportioning (weight %):
C?0.36、Si?1.1、Mn?1.2、Cr?1.2、Mo?0.4、V?0.18、Ti?0.08、P≤0.03、S≤0.025。
After the deformation normalizing,, obtain bainite+residual austenite tissue in 380 ℃ of tempering.
Mechanical property is as follows:
Intensity σ
b=1420Mpa, hardness HRC=42, impelling strength α
Ku=65J/cm
2, unit elongation δ
5=9.5%.
Embodiment three
Chemical Composition and content are in following ratio proportioning (weight %):
C?0.45、Si?0.7、Mn?0.8、Cr?1.15、Mo?0.36、V?0.19、Ti?0.10、P≤0.03、S≤0.025。
Behind the deformation oil quenching,, obtain the tempered sorbite tissue in 520 ℃ of tempering.
Mechanical property is as follows:
Intensity σ
b=1620Mpa, hardness HRC=48, impelling strength α
Ku=50J/cm
2, unit elongation δ
5=9%.
Claims (5)
1, a kind of high-strength abrasion-proof steel is characterized in that its Chemical Composition (weight %) is as follows:
C?0.25-0.55 Si?0.6-1.5 Mn?0.8-1.5 Cr?1-1.5 Mo?0.3-0.5
V?0.15-0.25 Ti?0.05-0.15 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
2, high-strength abrasion-proof steel according to claim 1 is characterized in that its Chemical Composition (weight %) is as follows:
C?0.25-0.35 Si?0.6-0.9 Mn?0.8-1.2 Cr?1-1.2 Mo?0.3-0.4
V?0.15-0.2 Ti?0.05-0.09 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
3, high-strength abrasion-proof steel according to claim 1 is characterized in that its Chemical Composition (weight %) is as follows:
C?0.28-0.4 Si?0.8-1.2 Mn?1.1-1.5 Cr?1.2-1.5 Mo?0.4-0.5
V?0.18-0.25 Ti?0.06-0.1 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
4, high-strength abrasion-proof steel according to claim 1 is characterized in that its Chemical Composition (weight %) is as follows:
C?0.3-0.48 Si?0.6-0.8 Mn?0.9-1.2 Cr?1.1-1.3 Mo?0.3-0.4
V?0.18-0.24 Ti?0.08-0.12 P≤0.03 S≤0.025
All the other are Fe and unavoidable impurities.
5,, it is characterized in that manufacturing process flow is according to the manufacture method of claim 1,2,3 or 4 described high-strength abrasion-proof steels:
Outer ladle refining → the ingot casting of electric arc furnace smelting → vacuum oven refining → stove → just roll into base → forging molding → thermomechanical treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB200510078257XA CN100449027C (en) | 2005-06-09 | 2005-06-09 | High strength abrasion resistant steel and method for producing the same |
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| CNB200510078257XA CN100449027C (en) | 2005-06-09 | 2005-06-09 | High strength abrasion resistant steel and method for producing the same |
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| CN1699613A true CN1699613A (en) | 2005-11-23 |
| CN100449027C CN100449027C (en) | 2009-01-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434538C (en) * | 2006-09-01 | 2008-11-19 | 西安交通大学 | Purifying and alloying method of wear-resistant steel fusant |
| CN101775550B (en) * | 2009-01-14 | 2012-05-30 | 常州朗锐活塞有限公司 | Piston top material of combined piston for big cylinder-diameter diesel engine |
| CN103252449A (en) * | 2013-05-08 | 2013-08-21 | 青岛钰鑫车辆工程有限公司 | Production method of composite material stirring wing |
| CN106566982A (en) * | 2016-10-26 | 2017-04-19 | 刘海华 | Preparing method for air cooling steel throat pipe liner plate |
| CN113774986A (en) * | 2021-08-11 | 2021-12-10 | 宁波吉威熔模铸造有限公司 | Impact-wear-resistant excavator bucket tooth and production process thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032198A (en) * | 1988-10-19 | 1989-04-05 | 乐山冶金机械轧棍厂 | The vanadium and titanium containing low-manganese wear resisting steel |
| CN1025506C (en) * | 1991-06-24 | 1994-07-20 | 河北工学院 | High-toughness antiwear lining plate of big ball mill and making technology thereof |
| AU663023B2 (en) * | 1993-02-26 | 1995-09-21 | Nippon Steel Corporation | Process for manufacturing high-strength bainitic steel rails with excellent rolling-contact fatigue resistance |
| CN1034678C (en) * | 1995-03-28 | 1997-04-23 | 王宇辉 | Low-alloy wear-resisting steel |
| CN1140205A (en) * | 1995-03-28 | 1997-01-15 | 王宇辉 | Medium-carbon medium-alloy wear-resisting steel |
| CN1182142A (en) * | 1996-11-07 | 1998-05-20 | 鞍山钢铁集团公司 | Abrasion-resisting cast steel |
| CN1061385C (en) * | 1998-06-19 | 2001-01-31 | 四川工业学院 | High-performance abrasion-resistant steel for switch tongue of high-speed or quasi high-speed railway |
| CN1128245C (en) * | 2001-10-22 | 2003-11-19 | 刘承刚 | High-strength alloyed cast steel with high resistance to wear and impact and its preparing process |
-
2005
- 2005-06-09 CN CNB200510078257XA patent/CN100449027C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434538C (en) * | 2006-09-01 | 2008-11-19 | 西安交通大学 | Purifying and alloying method of wear-resistant steel fusant |
| CN101775550B (en) * | 2009-01-14 | 2012-05-30 | 常州朗锐活塞有限公司 | Piston top material of combined piston for big cylinder-diameter diesel engine |
| CN103252449A (en) * | 2013-05-08 | 2013-08-21 | 青岛钰鑫车辆工程有限公司 | Production method of composite material stirring wing |
| CN103252449B (en) * | 2013-05-08 | 2015-12-02 | 青岛钰鑫车辆工程有限公司 | Composite stirs wing production method |
| CN106566982A (en) * | 2016-10-26 | 2017-04-19 | 刘海华 | Preparing method for air cooling steel throat pipe liner plate |
| CN113774986A (en) * | 2021-08-11 | 2021-12-10 | 宁波吉威熔模铸造有限公司 | Impact-wear-resistant excavator bucket tooth and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100449027C (en) | 2009-01-07 |
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Owner name: TONGXIANG DESHENG RAILWAY EQUIPMENT CO., LTD. Free format text: FORMER OWNER: GUAN TIE Effective date: 20130822 |
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Free format text: CORRECT: ADDRESS; FROM: 066000 QINHUANGDAO, HEBEI PROVINCE TO: 314500 JIAXING, ZHEJIANG PROVINCE |
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Effective date of registration: 20130822 Address after: 314500, No. 2229, South Road, Indus street, Tongxiang, Zhejiang Patentee after: Tongxiang Desheng railway equipment limited liability company Address before: 066000 East Ring North 4-3-2, Hebei, Qinhuangdao Patentee before: Guan Tie |
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Owner name: ZHEJIANG DESHENG RAILWAY EQUIPMENT CO., LTD. Free format text: FORMER NAME: TONGXIANG DESHENG RAILWAY EQUIPMENT CO., LTD. |
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Address after: 314500 No. 1285 Guangming Road, Zhejiang, Tongxiang Patentee after: ZHEJIANG DESHENG RAILWAY EQUIPMENT CO., LTD. Address before: 314500, No. 2229, South Road, Indus street, Tongxiang, Zhejiang Patentee before: Tongxiang Desheng railway equipment limited liability company |