CN102586687A - Spring steel material with high strength and high hardenability - Google Patents
Spring steel material with high strength and high hardenability Download PDFInfo
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- CN102586687A CN102586687A CN2012100038599A CN201210003859A CN102586687A CN 102586687 A CN102586687 A CN 102586687A CN 2012100038599 A CN2012100038599 A CN 2012100038599A CN 201210003859 A CN201210003859 A CN 201210003859A CN 102586687 A CN102586687 A CN 102586687A
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Abstract
The invention provides a spring steel material with high strength and high hardenability. The spring steel material comprises the following components in percentage by weight: 0.50%-0.55% of C, 0.90%-1.20% of Mn, 0.80-1.10% of Si, 0.10%-0.20% of V, 0.90%-1.10% of Cr, 0.010%-0.040% of Nb, less than or equal to 0.03% of P, less than or equal to 0.03% of S and the rest of Fe. Compared with spring steel 52CrMnBA, the spring steel material has higher yield strength; and compared with spring steel 60CrMnBA, the spring steel material has less quenching cracking tendency and low economical price. The spring steel material has high hardenability, high toughness performance and low quenching cracking tendency and is the optimal choice for a high toughness elastic element with a large cross section so that the design stress of the spring steel is increased from 370-430MPa of a domestic common material to 600-700MPa. The spring steel material is particularly suitable for a steel plate spring with the thickness of larger than or equal to 20mm and less than or equal to 42mm.
Description
Technical field
The present invention relates to a kind of spring steel material, the spring steel material of especially a kind of HS and high-hardenability.Be applicable to the material of making large section, heavily stressed spring element, be specially adapted to make thickness>=20 millimeter ,≤42 millimeters plate spring.
Background technology
At present, domestic commonly used being used to made heavy in section heavily stressed, high-intensity spring steel material and mainly contained kinds such as 60CrMnBA, 52CrMnBA, 51CrV4.60CrMnBA has the characteristics of HS, high-hardenability; But the hardening break tendency is big; Present domestic this material of having stopped using basically; Though and 52CrMnBA material toughness and hardening capacity are higher, its ys has satisfied not heavily stressed, the light-weighted design requirements of present product, and these descriptions of materials can only be applied to the product development of stress in 370～430MPa scope.
Summary of the invention
The present invention provides the spring steel material of a kind of HS and high-hardenability, is that a kind of hardening capacity, ys are high than spring steel 52CrMnBA, and the hardening break tendency is little than spring steel 60CrMnBA, and the spring steel material of price economy.
Technical scheme of the present invention is: the spring steel material of a kind of HS and high-hardenability is characterized in that by weight percentage its composition is: 0.50%～0.55% C; 0.90%～1.20% Mn, 0.80%～1.10% Si, 0.10%～0.20% V; 0.90%～1.10% Cr, 0.010%～0.040% Nb ,≤0.03% P; ≤0.03% S, all the other are Fe.
HS of the present invention and high hardenability spring steel material, according to international label principle, should called after 50SiCrMnVA.
In order to realize high-hardenability of the present invention, the low tendentious performance of hardening break; The present invention has carried out rational adjustment with reference to 52CrMnBA and 60CrMnBA to the composition of material; 52CrMnBA compares with spring steel, and the present invention has adopted higher carbon content, to improve its intensity; But; Because the increase of carbon content can weaken the effect of the enhancing hardening capacity of boron in the steel; So the present invention does not use element boron, but the mode of the content through improving manganese improves hardening capacity and reduces the critical cooling velocity of steel, thereby suppressed the hardening break tendency of this material.Element manganese (Mn) is to improve the most effectively alloying element of hardening capacity, and manganese (Mn) can improve matrix strength and elasticity attenuation resistance effectively to the α-solution strengthening effect is arranged mutually.For elastic limit, yield strength and the yield tensile ratio that improves steel significantly, improve the hardening capacity of steel, the content of Si has significantly raising than 52CrMnBA among the present invention.In order effectively to improve the intensity and the hardening capacity of material of the present invention, the content of Cr also increases than 52CrMnBA.Chromium (Cr) is carbide forming element, can significantly improve the hardening capacity of steel, also can reduce the activity of carbon in the steel, thereby has improved the intensity of activation of spring steel carbon diffusion, alleviates decarburizing tendency.When passing through the adjustment of elements such as C, Si, Cr, Mn, the present invention has also added micro-Nb and V, has played the effect of crystal grain thinning.
Beneficial effect: the present invention has high-hardenability, high-strong toughness, low hardening break proneness; It is good replenishing to present GB1222-92 spring steel material; It is the optimal selection of large section high-strong toughness elastic element; Make the spring steel stress be increased to 600～700MPa, be specially adapted to thickness>=20 ㎜, the plate spring of≤42 ㎜ by 370～430MPa of domestic common material.
Embodiment
One, embodiment:
1, the spring steel material of a kind of high-strong toughness of the present invention and high-hardenability is provided with composition according to following proportioning, by weight percentage; Its composition is: 0.50%～0.55% C, 0.90%～1.20% Mn, 0.80%～1.10% Si; 0.10%～0.20% V, 0.90%～1.10% Cr, 0.010%～0.040% Nb; ≤0.03% P ,≤0.03% S, all the other are Fe;
2, take sophisticated conventional explained hereafter of producing plate spring, the hot rolling technology method such as producing the 52CrMnBA Steel Spring Plate can realize production of the present invention.
Two, each item index contrast:
Applicant of the present invention has entrusted producer's hot rolling system this material of certain specification has carried out correlation test, in order to contrast conveniently, select for use under this specification at present comprehensive mechanical performance preferably 52CrMnBA compare.Show through test, for bar, relative 52CrMnBA, the through hardening layer depth can improve 20% on the basis of 52CrMnBA, its intensity index: ys σ s reaches 1570MPa.Tensile strength sigma s reaches 1750MPa, and exceed about 45% its toughness index than 52CrMnBA standard-required: elongation δ reaches about 8%, and relative reduction in area ψ reaches about 24.1%, than 52CrMnBA require lowly, explain that toughness plasticity descends than the 52CrMnBA material to some extent.So the present invention is applicable to the large section, requires the manufacturing of heavily stressed elastic element to use material, is specially adapted to thickness>=20 ㎜, material is used in the plate spring manufacturing of≤42 ㎜.
Three, 50SiCrMnVA and 52CrMnBA are carried out all correlated data such as chemical ingredients, hardening capacity, mechanical performance index, fatigue life test shown in following four tables:
1, chemical ingredients contrast (%):
2, hardening capacity contrast:
| Leave to the water-cooled end distance! ㎜) | 3.0 | 7.0 | 11.0 | 15.0 | 20.0 | 25.0 | 30.0 |
| 50SiCrMnVA(HRC) | 61.2 | 60.9 | 60.1 | 60.2 | 59.9 | 59.0 | 56.3 |
| 52CrMnBA (HRC) | 60.6 | 60.3 | 59.4 | 57.8 | 53.1 | 48.5 | 44.9 |
3, mechanical performance index contrast:
4, fatigue life test:
Using specification respectively is the heavy goods vehicles leaf spring that 20 * 90 materials of the present invention and 52CrMnBA make, and has carried out simultaneous test by the Qcn29035-1991 standard, and the result is following:
Claims (1)
1. the spring steel material of HS and high-hardenability is characterized in that by weight percentage its composition is: 0.50%～0.55% C; 0.90%～1.20% Mn, 0.80%～1.10% Si, 0.10%～0.20% V; 0.90%～1.10% Cr, 0.010%～0.040% Nb ,≤0.03% P; ≤0.03% S, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100038599A CN102586687A (en) | 2012-01-09 | 2012-01-09 | Spring steel material with high strength and high hardenability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100038599A CN102586687A (en) | 2012-01-09 | 2012-01-09 | Spring steel material with high strength and high hardenability |
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| CN102586687A true CN102586687A (en) | 2012-07-18 |
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| CN2012100038599A Pending CN102586687A (en) | 2012-01-09 | 2012-01-09 | Spring steel material with high strength and high hardenability |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106279985A (en) * | 2016-08-15 | 2017-01-04 | 合肥万向钱潮汽车零部件有限公司 | Automobile buffer spring material prescription |
| WO2017017290A1 (en) | 2015-07-28 | 2017-02-02 | Gerdau Investigacion Y Desarrollo Europa, S.A. | Steel for springs of high resistance and hardenability |
| CN107267864A (en) * | 2017-06-16 | 2017-10-20 | 山东雷帕得汽车技术股份有限公司 | A kind of novel high-strength LPD50 spring steel |
| CN110257701A (en) * | 2019-06-20 | 2019-09-20 | 东风商用车有限公司 | A kind of spring steel material and the air suspension of automobile leading arm using material production |
| CN111334708A (en) * | 2020-03-05 | 2020-06-26 | 马鞍山钢铁股份有限公司 | High-strength spring steel with tensile strength of more than or equal to 2250MPa and excellent fatigue performance and production method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693528A (en) * | 2005-05-27 | 2005-11-09 | 东风汽车悬架弹簧有限公司 | High toughness high hardenability spring steel material |
| CN101619418A (en) * | 2008-07-03 | 2010-01-06 | 孙心红 | Big-wire diameter suspension helical spring material and preparation method thereof |
-
2012
- 2012-01-09 CN CN2012100038599A patent/CN102586687A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693528A (en) * | 2005-05-27 | 2005-11-09 | 东风汽车悬架弹簧有限公司 | High toughness high hardenability spring steel material |
| CN101619418A (en) * | 2008-07-03 | 2010-01-06 | 孙心红 | Big-wire diameter suspension helical spring material and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017017290A1 (en) | 2015-07-28 | 2017-02-02 | Gerdau Investigacion Y Desarrollo Europa, S.A. | Steel for springs of high resistance and hardenability |
| CN106279985A (en) * | 2016-08-15 | 2017-01-04 | 合肥万向钱潮汽车零部件有限公司 | Automobile buffer spring material prescription |
| CN107267864A (en) * | 2017-06-16 | 2017-10-20 | 山东雷帕得汽车技术股份有限公司 | A kind of novel high-strength LPD50 spring steel |
| CN110257701A (en) * | 2019-06-20 | 2019-09-20 | 东风商用车有限公司 | A kind of spring steel material and the air suspension of automobile leading arm using material production |
| CN111334708A (en) * | 2020-03-05 | 2020-06-26 | 马鞍山钢铁股份有限公司 | High-strength spring steel with tensile strength of more than or equal to 2250MPa and excellent fatigue performance and production method thereof |
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Application publication date: 20120718 |