CN104674133A - Weather-resistant spring flat steel - Google Patents
Weather-resistant spring flat steel Download PDFInfo
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- CN104674133A CN104674133A CN201510096873.1A CN201510096873A CN104674133A CN 104674133 A CN104674133 A CN 104674133A CN 201510096873 A CN201510096873 A CN 201510096873A CN 104674133 A CN104674133 A CN 104674133A
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Abstract
The invention discloses weather-resistant spring flat steel which is characterized by comprising chemical components in percentage by weight as follows: 0.30-0.40% of Si, 0.85-0.95% of Mn, 0.54-0.62% of C, 0.85-0.95% of Cr, 0.001-0.004% of B, smaller than or equal to 0.025% of P, smaller than or equal to 0.020% of S, smaller than or equal to 0.25% of Ni, smaller than or equal to 0.25% of Cu, smaller than or equal to 0.0070% of N and the balance of Fe. A heat treatment system for production of the steel is as follows: the quenching temperature ranges from 830 DEG C to 860 DEG C, the quenching medium is oil, and the tempering temperature ranges from 470 DEG C to 530 DEG C.
Description
Technical field
The present invention relates to a kind of weather-proof spring flat steel.
Background technology
The making material of automotive plate spring (leaf spring) is flat for playing.Along with China's heavy-duty car industrial expansion, there is higher requirement to the demand of automobile sheetsteel spring.Current automobile sheetsteel spring and to play the flat main trade mark be 60Si2Mn, 50CrVA, 50CrV4, SUP9 etc., does not have weather resistance.In order to prevent the corrosion of air, must mopping by the leaf spring of the flat making of the bullet of these trades mark or plate spring assembly, to prevent from getting rusty.
Summary of the invention
The object of the present invention is to provide a kind of weather-proof spring flat steel, there is good weather resistance, can use in air, rain, water, not produce obvious corrosion.
The object of the present invention is achieved like this, a kind of weather-proof spring flat steel, its chemical composition is N≤0.0070% in (weight percent): Si 0.30 ~ 0.40%, Mn 0.85 ~ 0.95%, C 0.54 ~ 0.62%, Cr 0.85 ~ 0.95%, B 0.001 ~ 0.004%, P≤0.025%, S≤0.020%, Ni≤0.25%, Cu≤0.25%, steel, and surplus is Fe; The heat treating regime of producing this steel grade is as follows: quenching temperature/DEG C 830 ~ 860, quenchant: oil, tempering temperature/DEG C 470 ~ 530.
B element in spring flat steel chemical composition of the present invention is the principal element making this steel grade obtain weather resistance.As long as the B of trace, the effect of Cr in steel just can be made to increase more than ten doubly, thus obtain certain resistance to corrosion.B is a kind of cheap chemical element, does not almost affect the production cost of steel.
Steel grade mechanical property of the present invention provides as follows table 1.This steel grade trade mark is fixed tentatively as BGNTB-1.
Steel grade As rolled of the present invention is ensure good shearing and machining property, requires the As rolled hardness≤321HBW of spring flat steel.Stay-warm case slow cooling must be added a cover during Steel Rolling; Answer quick collection to be the steel stack of cross section 400mm × 500mm after lower cold bed, pile up neat, cooling in heap; Forbid, to finished product water-spraying control, to forbid intersection to be put.
Respectively rolling 16 × 90,18 × 90,20 × 89,22 × 89,25 × 90(mm) spring flat steel of five kinds of specifications, mechanical property actual achievement is in table 2.
Weather resistance is tested:
Get 2, the flat sample of BGNTB-1 bullet.A slice is hot-rolled state, and another sheet surface have passed through pickling.Weather resistance test: sample is placed in an atmosphere, weekly with wetting rag wipe surfaces once, in the test period of 1 year half, the flat specimen surface of BGNTB-1 bullet, without obvious yellow rusty stain, indicates good weather resistance.
The advantage of steel grade spring flat steel of the present invention
:1, intensity is high.Intensity is higher than the intensity of 60Si2Mn, 50CrVA, SUP9.2, hardening capacity is good.Owing to being added with B in steel, the through hardening excellent property of steel.3, good weatherability.With leaf spring and the assembly of the flat making of BGNTB-1 bullet, due to weather-proof, so without mopping.Significantly reduce the cost of manufacture of leaf spring.4, with the leaf spring of the flat making of BGNTB-1 bullet, there is certain resistance to corrosion, reduce the corrosion of leaf spring, the work-ing life of leaf spring and assembly can be improved.Steel grade of the present invention has good mechanical property, and application prospect is good.
Embodiment:
A kind of weather-proof spring flat steel, its chemical composition is N≤0.0070% in (weight percent): Si 0.30 ~ 0.40%, Mn 0.85 ~ 0.95%, C 0.54 ~ 0.62%, Cr 0.85 ~ 0.95%, B 0.001 ~ 0.004%, P≤0.025%, S≤0.020%, Ni≤0.25%, Cu≤0.25%, steel, and surplus is Fe; The heat treating regime of producing this steel grade is as follows: quenching temperature/DEG C 830 ~ 860, quenchant: oil, tempering temperature/DEG C 470 ~ 530.
As optimal way of the present invention, its chemical composition of this steel grade is N 0.0070% in (weight percent): Si 0.35%, Mn 0.90%, C 0.59%, Cr 0.90%, B 0.003%, P 0.025%, S 0.020%, Ni 0.25%, Cu 0.25%, steel, and surplus is Fe; The heat treating regime of producing this steel grade is as follows: quenching temperature/DEG C 850, quenchant: oil, tempering temperature/DEG C 500.
Claims (2)
1. a weather-proof spring flat steel, it is characterized in that: its chemical composition is N≤0.0070% in (weight percent): Si 0.30 ~ 0.40%, Mn 0.85 ~ 0.95%, C 0.54 ~ 0.62%, Cr 0.85 ~ 0.95%, B 0.001 ~ 0.004%, P≤0.025%, S≤0.020%, Ni≤0.25%, Cu≤0.25%, steel, and surplus is Fe; The heat treating regime of producing this steel grade is as follows: quenching temperature/DEG C 830 ~ 860, quenchant: oil, tempering temperature/DEG C 470 ~ 530.
2. spring flat steel according to claim 1, it is characterized in that: its chemical composition is N 0.0070% in (weight percent): Si 0.35%, Mn 0.90%, C 0.59%, Cr 0.90%, B 0.003%, P 0.025%, S 0.020%, Ni 0.25%, Cu 0.25%, steel, and surplus is Fe; The heat treating regime of producing this steel grade is as follows: quenching temperature/DEG C 850, quenchant: oil, tempering temperature/DEG C 500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096873.1A CN104674133A (en) | 2015-03-05 | 2015-03-05 | Weather-resistant spring flat steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096873.1A CN104674133A (en) | 2015-03-05 | 2015-03-05 | Weather-resistant spring flat steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104674133A true CN104674133A (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510096873.1A Pending CN104674133A (en) | 2015-03-05 | 2015-03-05 | Weather-resistant spring flat steel |
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| CN (1) | CN104674133A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568131A (en) * | 2015-12-31 | 2016-05-11 | 安徽红桥金属制造有限公司 | Corrosion resistant spring steel and heat treatment process |
| CN106555115A (en) * | 2016-10-27 | 2017-04-05 | 北京科技大学 | A kind of casting skin spring flat steel rolling mill practice method |
| CN109161803A (en) * | 2018-09-29 | 2019-01-08 | 武汉钢铁有限公司 | A kind of 1550MPa grades of spring flat steel and its production method |
| CN110629119A (en) * | 2019-10-31 | 2019-12-31 | 武汉钢铁有限公司 | Spring flat steel and manufacturing process thereof |
| CN111349852A (en) * | 2018-12-24 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Method for producing 55CrMnBA large-section elastic flat continuous casting billet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993981A (en) * | 2009-08-21 | 2011-03-30 | 宝钢集团新疆八一钢铁有限公司 | Production process of 55CrMnBA spring steel |
| CN103014517A (en) * | 2013-01-11 | 2013-04-03 | 方大特钢科技股份有限公司 | Multicomponent alloy integrated spring flat steel |
-
2015
- 2015-03-05 CN CN201510096873.1A patent/CN104674133A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993981A (en) * | 2009-08-21 | 2011-03-30 | 宝钢集团新疆八一钢铁有限公司 | Production process of 55CrMnBA spring steel |
| CN103014517A (en) * | 2013-01-11 | 2013-04-03 | 方大特钢科技股份有限公司 | Multicomponent alloy integrated spring flat steel |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568131A (en) * | 2015-12-31 | 2016-05-11 | 安徽红桥金属制造有限公司 | Corrosion resistant spring steel and heat treatment process |
| CN106555115A (en) * | 2016-10-27 | 2017-04-05 | 北京科技大学 | A kind of casting skin spring flat steel rolling mill practice method |
| CN106555115B (en) * | 2016-10-27 | 2018-02-02 | 北京科技大学 | A kind of casting skin spring flat steel rolling mill practice method |
| CN109161803A (en) * | 2018-09-29 | 2019-01-08 | 武汉钢铁有限公司 | A kind of 1550MPa grades of spring flat steel and its production method |
| CN111349852A (en) * | 2018-12-24 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Method for producing 55CrMnBA large-section elastic flat continuous casting billet |
| CN110629119A (en) * | 2019-10-31 | 2019-12-31 | 武汉钢铁有限公司 | Spring flat steel and manufacturing process thereof |
| CN110629119B (en) * | 2019-10-31 | 2021-10-01 | 武汉钢铁有限公司 | Spring flat steel and manufacturing process thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180717 Address after: 830022 No. 1 Bayi Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region Applicant after: Xinjiang Bayi Iron & Steel Co., Ltd. Address before: 830022 No. 1 Bayi Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region Applicant before: Baosteel Group Xinjiang Bayi Iron & Steel Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |