CN1477225A - Medium carbon and medium-high carbon manganese system self-hardening bainite steel - Google Patents
Medium carbon and medium-high carbon manganese system self-hardening bainite steel Download PDFInfo
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- CN1477225A CN1477225A CNA031500919A CN03150091A CN1477225A CN 1477225 A CN1477225 A CN 1477225A CN A031500919 A CNA031500919 A CN A031500919A CN 03150091 A CN03150091 A CN 03150091A CN 1477225 A CN1477225 A CN 1477225A
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Abstract
The present invention belongs to the field of low alloy steel, and relates to medium carbon and medium-high carbon manganese system air-cooled bainite steel, using C, Mn and Si as main alloy element and the air-cooling can obtain the uniform heterogeneous structure. Its composition includes C 0.35-0.60 wt%, Mn 1.80-3.00 wt%, Si 0.20-2.00 wt%, Cr 0-2.00 wt%, P 0.01-0.035 wt%, S 0.01-0.035 wt% and the rest is Fe. It can be used for making various springs, making high-toughness structure component and various wear-resistant steel balls, precision mould and large rack, etc.
Description
Technical field the invention belongs to the low alloy steel field, relates to a class novel high-strength toughness air-cooled bainitic steels.
Background technology bainitic steel air cooling from hard, simplify production process, improve performance, and significantly reduce cost, thereby cause in the world and greatly pay attention to.At the end of the fifties, it is bainitic steel that people such as Britain professor P.B.Pickering at first invent Mo-B, and its application is restricted; Another kind of is being bainitic steel in the Mn-B of initial stage seventies invention headed by the Chinese Fang Hongsheng professor.Because the cost of material of Mn has only the 1/30-1/25 of Mo, its superiority is remarkable; Mn-B is that bainitic steel air cooling through hardening ability is strong, the bainite transformation temperature is low and obdurability is high, thus obtained excellent popularization and application in recent years, and demonstrate wide application prospect day by day.
Patent publication No. is that the air-cooled bainitic steels patent of CN1042950A has overcome CN8010300A and the insufficient shortcoming of CN8010310A patent hardening capacity by the approach that improves Mn content and add strong hardening capacity element Hf, B, but the adding of Mn too high levels and Hf, B makes the alloying cost increase, also strengthen simultaneously the difficulty that smelting technology is controlled on the one hand; Processing performance is also caused to a certain degree weakening, therefore issue this patent.
Summary of the invention the objective of the invention is for solving the weak point of prior art, a kind of middle carbon and medium high carbon manganese series air-cooled bainitic steels are proposed, pass through C, Mn, the optimizing components of Si element has high toughness again when making steel have high air cooled hardenability and hardenability, and can improve the part performance by attached temper and hard surfacing processing behind air cooling according to composition and tissue characteristic with differing temps, compare with other types organization steel with intensity rank, it is good to have toughness and tenacity, technology is simple, save energy and characteristics such as with low cost, and can further expand Application Areas.
A kind of middle carbon and medium high carbon manganese series air-cooled bainitic steels that the present invention proposes is characterized in that with C, Mn, Si be main alloy element, and air cooling obtains uniform heterogeneous structure, and the weight percent of its composition is:
C:0.35～0.60wt.%; Mn:1.80～3.00wt.%; Si:0.20～2.00wt.%; Cr:0～2.00wt.%; P:0～0.035wt.%; S:0～0.03wt.%; Surplus is Fe.
Middle carbon that the present invention proposes and medium high carbon manganese series air-cooled bainitic steels are applicable to following field respectively according to the difference of composition, microstructure and property:
1. when being used to make all kinds of spring, its preferable composition range is C:0.35～0.55wt.%; Mn:1.90～3.00wt.%; Si:0.90～2.00wt.%; Can obtain carbide-free Bainite/martensite heterogeneous structure under the air cooling condition.
σ after low-temperaturetempering
b〉=1900MPa; σ
0.2〉=1650MPa; σ
0.2/ σ
b〉=0.88, δ
5〉=7%; ψ 〉=35%; a
Ku〉=35J/cm
2σ
R0.1〉=1630MPa, have and be suitable for making various high-performance springs, comprise laminated spring, coil spring and tapered spring, heating for multiple times operation in the conventional spring production process can be merged into only needs a heating process, realize the ultrashort flow process that spring is produced, can alleviate the spring deadweight significantly and reduce cost save energy, and having higher elasticity attenuation resistance energy, is the replacement steel grade of existing spring steel.
2. preferable composition range C:0.35～0.55wt.% when being used to make the structural part of high tenacity; Mn:1.90～3.00wt.%; Si:0.20～0.90wt.%;
Can improve the comprehensive use properties of steel by high tempering and quenching technology for surfaces.Behind high tempering, has good combination of strength and toughness, σ
b〉=850MPa; σ
0.2〉=750MPa; δ
5〉=18%; ψ 〉=45%; a
Ku〉=110J/cm
2, can substitute the close quenched and tempered steel of performance and be used to make various high-strength structure spares, as semiaxis, bent axle, camshaft; And can carry out hard surfacing and handle.Compared with similar products, exempt specially and quenching, high comprehensive performance, save energy, cost reduces significantly.
3. this steel grade can use at forging rolling thermoforming state, also can use at the casting state, and its preferable composition range is C:0.45～0.60wt.%; Mn:1.90～3.00wt.%; Si:0.90～2.00wt.%; This steel grade has high bainite air cooled hardenability and hardenability, can obtain the bainite/martensite heterogeneous structure behind the air cooling, and hardness can reach more than the HRc54, non-notch a
k〉=17J/cm
2, can exempt quenching process, be applicable to parts such as making various abrasion-proof steel balls, precision die and large-scale tooth bar, have advantages such as hardness height, long service life, technology be with low cost, on engineering is used, distinct economic arranged.
The present invention also can select to add one or more of V, Nb, B, Mo, Ni element according to the requirement of concrete Application Areas.
Embodiment
The multinomial embodiment of carbon and medium high carbon manganese series air-cooled bainitic steels is as follows in of the present invention:
| Numbering | Chemical ingredients (wt.%) | |||||||
| ?C | ?Mn | ?Si | ?Cr | ?P | ?S | ?Ti | Other | |
| ?No.1 | ?0.34 | ?2.09 | ?1.50 | ?0.40 | ?0.01 | ?0.01 | 0.10V， 0.05Nb | |
| ?No.2 | ?0.35 | ?2.19 | ?1.47 | ?0.89 | ?0.03 | ?0.02 | ?0.011 | 0.003B |
| ?No.3 | ?0.37 | ?2.06 | ?1.58 | ?0.52 | ?0.03 | ?0.02 | 0.26Mo 0.52Ni | |
| ?No.4 | ?0.39 | ?2.35 | ?1.60 | ?0.02 | ?0.02 | 0.22Mo | ||
| ?No.5 | ?0.42 | ?2.25 | ?1.44 | ?0.56 | ?0.01 | ?0.01 | ||
| ?No.6 | ?0.45 | ?2.26 | ?1.58 | ?0.03 | ?0.02 | 0.26Mo | ||
| ?No.7 | ?0.47 | ?2.10 | ?1.61 | ?0.02 | ?0.02 | ?0.02 | ?0.023 | 0.002B |
| ?No.8 | ?0.48 | ?2.16 | ?1.71 | ?0.87 | ?0.01 | ?0.02 | ||
| ?No.9 | ?0.52 | ?2.34 | ?1.65 | ?0.82 | ?0.01 | ?0.02 | ||
| ?No.10 | ?0.55 | ?2.15 | ?1.52 | ?0.47 | ?0.03 | ?0.03 | ?0.013 | 0.39Ni 0.002B |
| ?No.11 | ?0.35 | ?2.37 | ?0.62 | ?0.76 | ?0.02 | ?0.02 | ||
| ?No.12 | ?0.36 | ?2.28 | ?0.65 | ?0.01 | ?0.01 | |||
| ?No.13 | ?0.38 | ?2.34 | ?0.58 | ?0.93 | ?0.02 | ?0.01 | ?0.03 | 0.001B |
| ?No.14 | ?0.45 | ?2.39 | ?0.47 | ?0.90 | ?0.02 | ?0.01 | ||
| ?No.15 | ?0.46 | ?2.43 | ?0.50 | ?0.89 | ?0.03 | ?0.02 | 0.25Mo | |
| ?No.16 | ?0.47 | ?2.20 | ?0.64 | ?0.03 | ?0.02 | ?0.021 | 0.002B | |
| ?No.17 | ?0.53 | ?2.30 | ?1.50 | ?0.50 | ?0.02 | ?0.02 | ?0.03 | |
| ?No.18 | ?0.48 | ?2.20 | ?1.60 | ?0.01 | ?0.03 | ?0.30Re | ||
| ?No.19 | ?0.52 | ?2.30 | ?1.40 | ?0.45 | ?0.02 | ?0.01 | ||
| ?No.20 | ?0.55 | ?2.20 | ?1.70 | ?0.40 | ?0.03 | ?0.03 | ?0.04 | ?0.30Re |
| ?No.21 | ?0.57 | ?2.00 | ?1.00 | ?0.03 | ?0.02 | ?0.02 | ||
| ?No.22 | ?0.58 | ?2.34 | ?1.18 | ?0.50 | ?0.02 | ?0.02 | ?0.35Re |
The Application Areas that every embodiment is fit to is as follows:
Be suitable for making having of all kinds of springs: No.1-No.10
Be suitable for making the having of structural part of high tenacity: No.11-No.16
Be adapted at casting or forging rolling thermoforming state uses has: No.17-No.22
Claims (5)
1. carbon and medium high carbon manganese series air-cooled bainitic steels in one kind is characterized in that with C, Mn, Si be main alloy element, and air cooling obtains uniform heterogeneous structure, and the weight percent of its composition is:
C：0.30～0.60wt.％；Mn：1.80～3.00wt.％；Si：0.20～2.00wt.％；Cr：0～2.00wt.％；
P:0～0.035wt.%; S:0～0.035t.%; Surplus is Fe.
2. by described middle carbon of claim 1 and medium high carbon manganese series air-cooled bainitic steels, it is characterized in that its main alloy element composition is
C：0.30～0.55wt.％；Mn：1.90～3.00wt.％；Si：0.90～2.00wt.％；
3. by described middle carbon of claim 1 and medium high carbon manganese series air-cooled bainitic steels, it is characterized in that its main alloy element composition is
C：0.35～0.55wt.％；Mn：1.90～3.00wt.％；Si：0.20～0.90wt.％；
4. by described middle carbon of claim 1 and medium high carbon manganese series air-cooled bainitic steels, it is characterized in that its main alloy element composition is
C：0.45～0.60wt.％；Mn：1.90～3.00wt.％；Si：0.90～2.00wt.％；
By claim 1 described in carbon and medium high carbon manganese series air-cooled bainitic steels, it is characterized in that also adding one or more of column element down:
V：0.00～0.12wt.％；Nb：0.00～0.10wt.％；Ti：0.00～0.12wt.％；
B：0.00～0.004wt.％；Mo：0.00～0.30wt.％；Ni：0.00～0.60wt.％；
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031500919A CN1477225A (en) | 2003-08-01 | 2003-08-01 | Medium carbon and medium-high carbon manganese system self-hardening bainite steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031500919A CN1477225A (en) | 2003-08-01 | 2003-08-01 | Medium carbon and medium-high carbon manganese system self-hardening bainite steel |
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|---|---|
| CN1477225A true CN1477225A (en) | 2004-02-25 |
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|---|---|---|---|
| CNA031500919A Pending CN1477225A (en) | 2003-08-01 | 2003-08-01 | Medium carbon and medium-high carbon manganese system self-hardening bainite steel |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342053C (en) * | 2005-05-27 | 2007-10-10 | 东风汽车悬架弹簧有限公司 | High toughness high hardenability spring steel material |
| CN100473737C (en) * | 2007-04-24 | 2009-04-01 | 昆明理工大学 | Wear-resistant bainite cast steel liner plate and manufacture process thereof |
| CN101892426A (en) * | 2010-06-21 | 2010-11-24 | 余忠友 | Medium and high-carbon Bainite steel and preparation method thereof |
| CN102925819A (en) * | 2011-08-08 | 2013-02-13 | 王军祥 | High-toughness wear-resistant multiphase steel pick and manufacturing process |
| CN103695778A (en) * | 2013-12-24 | 2014-04-02 | 攀枝花攀煤矿山机械制造有限公司 | Preparation technology for chain wheel of heavy scraper conveyor |
| CN103695767A (en) * | 2013-12-18 | 2014-04-02 | 宁夏维尔铸造有限责任公司 | Bainite steel |
| CN104120362A (en) * | 2014-06-27 | 2014-10-29 | 苏州市盛百威包装设备有限公司 | High-toughness spring steel and preparation method thereof |
| CN104451408A (en) * | 2014-12-04 | 2015-03-25 | 北京科技大学 | Medium-carbon ultrahigh strength bainite steel and preparation method thereof |
| CN104726781A (en) * | 2015-04-08 | 2015-06-24 | 攀钢集团成都钢钒有限公司 | Abrasion-resistant seamless steel pipe for conveying and production method of abrasion-resistant seamless steel pipe for conveying |
| CN104878319A (en) * | 2015-05-26 | 2015-09-02 | 攀钢集团成都钢钒有限公司 | Seamless steel tube for 580 MPa class steel cylinders |
| CN106756506A (en) * | 2016-12-30 | 2017-05-31 | 天津大强钢铁有限公司 | It is agricultural to scratch ground rotary blade alloy spring Steel material |
| CN108588549A (en) * | 2017-12-28 | 2018-09-28 | 天津威尔朗科技有限公司 | A kind of drag conveyor high abrasion ledge and its manufacturing method |
-
2003
- 2003-08-01 CN CNA031500919A patent/CN1477225A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342053C (en) * | 2005-05-27 | 2007-10-10 | 东风汽车悬架弹簧有限公司 | High toughness high hardenability spring steel material |
| CN100473737C (en) * | 2007-04-24 | 2009-04-01 | 昆明理工大学 | Wear-resistant bainite cast steel liner plate and manufacture process thereof |
| CN101892426A (en) * | 2010-06-21 | 2010-11-24 | 余忠友 | Medium and high-carbon Bainite steel and preparation method thereof |
| CN101892426B (en) * | 2010-06-21 | 2013-05-01 | 江油贝得力金属新材料有限公司 | Medium and high-carbon Bainite steel and preparation method thereof |
| CN102925819A (en) * | 2011-08-08 | 2013-02-13 | 王军祥 | High-toughness wear-resistant multiphase steel pick and manufacturing process |
| CN103695767A (en) * | 2013-12-18 | 2014-04-02 | 宁夏维尔铸造有限责任公司 | Bainite steel |
| CN103695778B (en) * | 2013-12-24 | 2016-01-27 | 攀枝花攀煤矿山机械制造有限公司 | Preparation technology for chain wheel of heavy scraper conveyor |
| CN103695778A (en) * | 2013-12-24 | 2014-04-02 | 攀枝花攀煤矿山机械制造有限公司 | Preparation technology for chain wheel of heavy scraper conveyor |
| CN104120362B (en) * | 2014-06-27 | 2017-02-01 | 慈溪智江机械科技有限公司 | High-toughness spring steel and preparation method thereof |
| CN104120362A (en) * | 2014-06-27 | 2014-10-29 | 苏州市盛百威包装设备有限公司 | High-toughness spring steel and preparation method thereof |
| CN104451408A (en) * | 2014-12-04 | 2015-03-25 | 北京科技大学 | Medium-carbon ultrahigh strength bainite steel and preparation method thereof |
| CN104726781A (en) * | 2015-04-08 | 2015-06-24 | 攀钢集团成都钢钒有限公司 | Abrasion-resistant seamless steel pipe for conveying and production method of abrasion-resistant seamless steel pipe for conveying |
| CN104726781B (en) * | 2015-04-08 | 2017-06-13 | 攀钢集团成都钢钒有限公司 | One kind conveying wear-resisting seamless steel pipe and its production method |
| CN104878319A (en) * | 2015-05-26 | 2015-09-02 | 攀钢集团成都钢钒有限公司 | Seamless steel tube for 580 MPa class steel cylinders |
| CN106756506A (en) * | 2016-12-30 | 2017-05-31 | 天津大强钢铁有限公司 | It is agricultural to scratch ground rotary blade alloy spring Steel material |
| CN108588549A (en) * | 2017-12-28 | 2018-09-28 | 天津威尔朗科技有限公司 | A kind of drag conveyor high abrasion ledge and its manufacturing method |
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