CN106011630A - Automobile suspension spring steel with high fatigue strength and preparation method thereof - Google Patents
Automobile suspension spring steel with high fatigue strength and preparation method thereof Download PDFInfo
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- CN106011630A CN106011630A CN201610530627.7A CN201610530627A CN106011630A CN 106011630 A CN106011630 A CN 106011630A CN 201610530627 A CN201610530627 A CN 201610530627A CN 106011630 A CN106011630 A CN 106011630A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Abstract
The invention discloses automobile suspension spring steel with high fatigue strength and a preparation method thereof. The spring steel is prepared from the following components in percentage by mass: 0.33 to 0.46 percent of C, 0.7 to 1.2 percent of Si, 0.5 to 0.9 percent of Mn, 0.2 to 1.0 percent of Cr, 0.05 to 0.10 percent of Al, 0.02 to 0.04 percent of Co, 0.05 to 0.10 percent of Ta, 0.01 to 0.02 percent of B and the balance of Fe and unavoidable impurities. By reasonable control and regulation of the contents of all alloy elements and the allocation balance, all the elements achieve a synergistic effect; after being treated, the spring steel is higher in pitting resistance performance and corrosion and fatigue strength, and the tensile strength of the spring steel is higher than or equal to 1,890 MPa; the spring steel can be prepared into a spring with high fatigue strength, which has the maximum design shear strength of 1,170 MPa; therefore, weight reduction of an automobile can be realized, and the spring steel has extremely large popularization value.
Description
Technical field
The present invention relates to spring steel technical field, the automobile being specifically related to a kind of high-fatigue strength hangs
Frame spring steel and preparation method thereof.
Background technology
Automotive suspension spring is the flexible member in automotive suspension, make vehicle bridge and vehicle frame or vehicle body it
Catch cropping elasticity contacts, and bears and transmits vertical load, relaxes and suppress caused by uneven road surface
Impact.Bearing spring quality, plays vital work to vehicle stability, safety
With.The technology trends of automotive suspension spring is generally to lightweight, heavily stressed, highly reliable
Degree development, bearing spring design stress requires more than 1000MPa, high up to 1200MPa.
Conventional bearing spring mainly have leaf spring, helical spring, torsion-bar spring, air spring and
Several version such as rubber spring.Wherein, car spiral bearing spring, steel wire diameter 9.0～
16mm, conventional 4 bearing springs, each car averagely needs spring steel steel wire 10kg.In recent years
Coming, the expectation of automotive light weight technology is strong, as the high intensity of car body support helical spring all the more
The expectation changed is the strongest.Additionally, car body support helical spring is harsh owing to be placed in
Under corrosive environment, therefore it is required that it possesses durability.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of Steel for Automobile Suspension System and
Preparation method, intensity height and excellent anti-corrosion performance.
For realizing object above, the present invention is achieved by the following technical programs:
The Steel for Automobile Suspension System of a kind of high-fatigue strength, contains C by mass percentage
0.33-0.46%, Si 0.7-1.2%, Mn 0.5-0.9%, Cr 0.2-1.0%, Al 0.05-0.10%,
Co 0.02-0.04%, Ta 0.05-0.10%, B 0.01-0.02%, surplus is Fe and inevitable
Impurity.
Preferably, described spring steel is by mass percentage possibly together with W 0.05-0.15%, Mo
In 0.05-0.15%, Nb 0.05-0.10%, Zr 0.04-0.08%, Hf0.04-0.08% at least one
Plant element.
Preferably, described spring steel is by mass percentage possibly together with V 0.05-0.15%, Ti
At least one element in 0.05-0.2%.
The preparation method of the Steel for Automobile Suspension System of high-fatigue strength, comprises the following steps:
1) roll: produce spring steel by proportioning, be processed into wire rod, roll into helical spring
Shape；
2) quenching: spring is heated to 900-1000 DEG C of insulation 1h, then spring is immersed in isothermal
In quenching oil, the temperature of isothermal hardening oil is 80-120 DEG C, and the retention time is 8-12min；
3) tempering: the spring temper after oil of quenching is heated to 420-480 DEG C, air after insulation 2h
Cooling；
4) shot-peening: the spring after tempering is heated to 180-240 DEG C, peening.
Preferably, go out oil surface temperature after described spring isothermal hardening and be 200-240 DEG C.
The method have the benefit that in the present invention by control C content ensure spring strength and
Quenching degree, Si can improve the elastic limit of spring, yield point and tensile strength, and Mn increases spring
Quenching degree, and and ferrum form solid solution, improve the intensity of spring and hardness and wearability,
Cr improves the quenching degree of steel, wearability and corrosion resistance, has higher tempering resistivity,
Be difficult to decarburization when heat treatment, in mild steel, a certain amount of Al contributes to the hardness increasing steel with strong
Degree, Co can improve and improve the high-temperature behavior of steel, improves non-oxidizability and the corrosion resisting property of steel,
Ta can improve quality and the mechanical performance of steel, improves alloy high-temp intensity, the stability of carbide,
B is " vitamin " in steel, can increase hardenability exponentially, increases hardness and the tension stress of steel,
Improve the welding performance etc. of steel.W, Mo, Nb, Zr and Hf can improve the intensity of steel, can
Selecting to add according to required intensity, V, Ti are all carbides, can improve
The hardness of steel, crystal grain thinning, purify crystal boundary, reduces the aging sensitivity of steel, cold brittleness and corruption
Erosion property.After quenching and tempering, spring carried out bead, eliminate spring surface defect and by
The stress that Surface hardened layer produces, improves spring durability.The present invention passes through each alloy of Reasonable Regulation And Control
The content of element and allotment balance, make each element produce synergism, and spring after treatment is used
Steel pitting corrosion resistance, corrosion fatigue characteristic are more preferable, and tensile strength >=1890MPa can be made into maximum and sets
The high-fatigue strength spring of meter shear stress 1170MPa, contributes to the lightweight of automobile, has the biggest
Promotional value.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely retouched
State, it is clear that described embodiment is a part of embodiment of the present invention rather than whole realities
Execute example.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Embodiment 1:
The Steel for Automobile Suspension System of a kind of high-fatigue strength, contains C by mass percentage
0.42%, Si 1.0%, Mn 0.8%, Cr 0.7%, Al 0.08%, Co 0.03%, Ta 0.06%,
B 0.02%, Mo 0.1%, Hf0.05%, Ti 0.1%, surplus is Fe and inevitable impurity.
The preparation method of the Steel for Automobile Suspension System of high-fatigue strength, comprises the following steps:
1) roll: produce spring steel by proportioning, be processed into wire rod, roll into helical spring
Shape；
2) quenching: spring is heated to 900-1000 DEG C of insulation 1h, then spring is immersed in isothermal
In quenching oil, the temperature of isothermal hardening oil is 80-120 DEG C, and the retention time is 8-12min, spring
Surface temperature time fuel-displaced is 200-240 DEG C；
3) tempering: the spring temper after oil of quenching is heated to 420-480 DEG C, air after insulation 2h
Cooling；
4) shot-peening: the spring after tempering is heated to 180-240 DEG C, peening.
Embodiment 2:
The Steel for Automobile Suspension System of a kind of high-fatigue strength, contains C by mass percentage
0.35%, Si 1.2%, Mn 0.5%, Cr 1.0%, Al 0.05%, Co 0.04%, Ta 0.05%,
B 0.02%, W 0.05%, Mo 0.15%, V 0.05%, surplus is Fe and the most miscellaneous
Matter.
The preparation method of the Steel for Automobile Suspension System of high-fatigue strength, comprises the following steps:
1) roll: produce spring steel by proportioning, be processed into wire rod, roll into helical spring
Shape；
2) quenching: spring is heated to 900-1000 DEG C of insulation 1h, then spring is immersed in isothermal
In quenching oil, the temperature of isothermal hardening oil is 80-120 DEG C, and the retention time is 8-12min, spring
Surface temperature time fuel-displaced is 200-240 DEG C；
3) tempering: the spring temper after oil of quenching is heated to 420-480 DEG C, air after insulation 2h
Cooling；
4) shot-peening: the spring after tempering is heated to 180-240 DEG C, peening.
Embodiment 3:
The Steel for Automobile Suspension System of a kind of high-fatigue strength, contains C by mass percentage
0.46%, Si 0.7%, Mn 0.9%, Cr 0.2%, Al 0.10%, Co 0.02%, Ta 0.10%,
B 0.01%, Nb 0.07%, Ti 0.05%, surplus is Fe and inevitable impurity.
The preparation method of the Steel for Automobile Suspension System of high-fatigue strength, comprises the following steps:
1) roll: produce spring steel by proportioning, be processed into wire rod, roll into helical spring
Shape；
2) quenching: spring is heated to 900-1000 DEG C of insulation 1h, then spring is immersed in isothermal
In quenching oil, the temperature of isothermal hardening oil is 80-120 DEG C, and the retention time is 8-12min, spring
Surface temperature time fuel-displaced is 200-240 DEG C；
3) tempering: the spring temper after oil of quenching is heated to 420-480 DEG C, air after insulation 2h
Cooling；
4) shot-peening: the spring after tempering is heated to 180-240 DEG C, peening.
Embodiment 4:
A kind of Steel for Automobile Suspension System of high-fatigue strength, contain by mass percentage C 0.4%,
Si 1.1%, Mn 0.7%, Cr 0.5%, Al 0.05%, Co 0.04%, Ta 0.05%, B 0.02%,
Nb 0.10%, Zr 0.05%, V 0.05%, Ti 0.05%, surplus is Fe and the most miscellaneous
Matter.
The preparation method of the Steel for Automobile Suspension System of high-fatigue strength, comprises the following steps:
1) roll: produce spring steel by proportioning, be processed into wire rod, roll into helical spring
Shape；
2) quenching: spring is heated to 900-1000 DEG C of insulation 1h, then spring is immersed in isothermal
In quenching oil, the temperature of isothermal hardening oil is 80-120 DEG C, and the retention time is 8-12min, spring
Surface temperature time fuel-displaced is 200-240 DEG C；
3) tempering: the spring temper after oil of quenching is heated to 420-480 DEG C, air after insulation 2h
Cooling；
4) shot-peening: the spring after tempering is heated to 180-240 DEG C, peening.
To sum up, the embodiment of the present invention has the advantages that by Reasonable Regulation And Control each alloy unit
The content of element and allotment balance, make each element produce synergism, spring steel after treatment
Pitting corrosion resistance, corrosion fatigue characteristic are more preferable, and tensile strength >=1890MPa can be made into design maximum
The high-fatigue strength spring of shear stress 1170MPa, contributes to the lightweight of automobile.
It should be noted that in this article, the relational terms of such as first and second or the like is only
Only it is used for separating an entity or operation with another entity or operating space, and not necessarily
Require or imply and there is the relation of any this reality or suitable between these entities or operation
Sequence.And, term " includes ", " comprising " or its any other variant are intended to nonexcludability
Comprise, so that include the process of a series of key element, method, article or equipment not only
Including those key elements, but also include other key elements being not expressly set out, or also include
The key element intrinsic for this process, method, article or equipment.There is no more restriction
In the case of, statement " including ... " key element limited, it is not excluded that including described wanting
Process, method, article or the equipment of element there is also other identical element.
Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, those of ordinary skill in the art
It is understood that the technical scheme described in foregoing embodiments still can be modified by it,
Or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, not
The essence making appropriate technical solution departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. the Steel for Automobile Suspension System of a high-fatigue strength, it is characterised in that by quality hundred
Proportion by subtraction contains C 0.33-0.46%, Si 0.7-1.2%, Mn 0.5-0.9%, Cr 0.2-1.0%, Al
0.05-0.10%, Co 0.02-0.04%, Ta 0.05-0.10%, B 0.01～0.02%, surplus is Fe
And inevitable impurity.
2. the Steel for Automobile Suspension System of high-fatigue strength as claimed in claim 1, its feature
Being, described spring steel is by mass percentage possibly together with W 0.05-0.15%, Mo
In 0.05-0.15%, Nb 0.05-0.10%, Zr 0.04-0.08%, Hf0.04-0.08% at least one
Plant element.
3. the Steel for Automobile Suspension System of high-fatigue strength as claimed in claim 2, its feature
Being, described spring steel is by mass percentage possibly together with in V 0.05-0.15, Ti 0.05-0.2%
At least one element.
4. the Steel for Automobile Suspension System of the high-fatigue strength as described in claim 1-3 is arbitrary
Preparation method, it is characterised in that comprise the following steps:
1) roll: produce spring steel by proportioning, be processed into wire rod, roll into helical spring
Shape；
2) quenching: spring is heated to 900-1000 DEG C of insulation 1h, then spring is immersed in isothermal
In quenching oil, the temperature of isothermal hardening oil is 80-120 DEG C, and the retention time is 8-12min；
3) tempering: the spring temper after oil of quenching is heated to 420-480 DEG C, air after insulation 2h
Cooling；
4) shot-peening: the spring after tempering is heated to 180-240 DEG C, peening.
5. the preparation side of the Steel for Automobile Suspension System of high-fatigue strength as claimed in claim 4
Method, it is characterised in that go out oil surface temperature after described spring isothermal hardening and be 200-240 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530627.7A CN106011630A (en) | 2016-07-06 | 2016-07-06 | Automobile suspension spring steel with high fatigue strength and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610530627.7A CN106011630A (en) | 2016-07-06 | 2016-07-06 | Automobile suspension spring steel with high fatigue strength and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106011630A true CN106011630A (en) | 2016-10-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610530627.7A Pending CN106011630A (en) | 2016-07-06 | 2016-07-06 | Automobile suspension spring steel with high fatigue strength and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488821A (en) * | 2017-09-15 | 2017-12-19 | 安徽红桥金属制造有限公司 | A kind of oil seal spring and its production technology with high-yield strength |
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| CN103492600A (en) * | 2011-04-27 | 2014-01-01 | 新日铁住金株式会社 | Steel sheet for hot stamping members and method for producing same |
| JP2014005532A (en) * | 2012-05-31 | 2014-01-16 | Kobe Steel Ltd | High strength spring steel wire with excellent coiling property and hydrogen embrittlement resistance and manufacturing method thereof |
| CN103725984A (en) * | 2013-12-26 | 2014-04-16 | 浙江美力科技股份有限公司 | High-tenacity high-strength spring steel |
-
2016
- 2016-07-06 CN CN201610530627.7A patent/CN106011630A/en active Pending
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|---|---|---|---|---|
| US20030201036A1 (en) * | 2000-12-20 | 2003-10-30 | Masayuki Hashimura | High-strength spring steel and spring steel wire |
| CN101125402A (en) * | 2007-10-10 | 2008-02-20 | 大连弹簧有限公司 | Method for processing heat coiling spring whose spring wire diameter is 90 millimeter |
| WO2011121887A1 (en) * | 2010-03-29 | 2011-10-06 | Ｊｆｅスチール株式会社 | Spring steel and method of manufacture for same |
| CN103492600A (en) * | 2011-04-27 | 2014-01-01 | 新日铁住金株式会社 | Steel sheet for hot stamping members and method for producing same |
| JP2014005532A (en) * | 2012-05-31 | 2014-01-16 | Kobe Steel Ltd | High strength spring steel wire with excellent coiling property and hydrogen embrittlement resistance and manufacturing method thereof |
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| 胡隆伟等: "《紧固件材料手册》", 30 December 2014, 北京：中国宇航出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107488821A (en) * | 2017-09-15 | 2017-12-19 | 安徽红桥金属制造有限公司 | A kind of oil seal spring and its production technology with high-yield strength |
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Application publication date: 20161012 |