CN110055380A - A kind of prestressing force isothermal hardening method improving few leaf spring performance - Google Patents
A kind of prestressing force isothermal hardening method improving few leaf spring performance Download PDFInfo
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- CN110055380A CN110055380A CN201910423805.XA CN201910423805A CN110055380A CN 110055380 A CN110055380 A CN 110055380A CN 201910423805 A CN201910423805 A CN 201910423805A CN 110055380 A CN110055380 A CN 110055380A
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- leaf spring
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- 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
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- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/607—Molten salts
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- 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
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Metallurgy (AREA)
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Abstract
The present invention provides a kind of prestressing force isothermal hardening methods for improving few leaf spring performance, it include: that few leaf spring is heated to 860 DEG C~900 DEG C to bring it about complete austenitizing, then prestressing force is applied to few leaf spring and brings it about plastic deformation, then few leaf spring is immediately transferred to quench cooling 1min~3min in 240 DEG C~260 DEG C of quenching salt bath, isothermal 120min~180min in 280 DEG C~320 DEG C of isothermal salt bath is placed into, is finally taken out quickly air-cooled to room temperature.The present invention is by combining the working hardening and phase transformation strengthening that lack leaf spring material, obtain uniformly tiny lower bainite+martensite+retained austenite heterogeneous structure, few leaf spring is set to obtain the good fit of high intensity, high-ductility and high tenacity, to greatly improve the fatigue behaviour of few leaf spring, the production procedure for simplifying few leaf spring simultaneously, has saved energy consumption.
Description
Technical field
The present invention relates to a kind of isothermal hardening methods, and in particular to a kind of prestressing force isothermal hardening for improving few leaf spring performance
Method.
Background technique
Few piece variable-section steel sheet spring (referred to as lacking leaf spring) is a kind of advanced automobile leaf spring technology, it be usually by
The reed composition that 1~4 wide, isometric and section thickness changes along its length, at section each in the longitudinal direction
Stress is equal or approximately equal.Compared with multi-disc uniformsection leaf spring, few piece variable-section steel sheet spring can reduce self weight 30%
~40%, while the friction and wear due to caused by contacting between piece is reduced, improve the regularity and stability of running car.It is few
Leaf spring has been widely used for Light-duty Vehicle, car and medium and heavy vehicle, there is the development trend for gradually replacing cross-section multiple-leaf spring.Few piece
The manufacturing process route of spring includes: band steel blanking → center hole machined → variable cross-section rolling → end grasswort → heat treatment → shot-peening
Reinforcing → surface lacquer → assembly, wherein heat treatment is to guarantee that few leaf spring obtains the critical process of high-intensitive, good plasticity and toughness.Mesh
Preceding few leaf spring heat treatment uses always traditional quenching+average tempering technique, specifically comprises the processes of: 860 DEG C of heating austenitizings
The tempering of → rapid quenching oil hardening → 450 DEG C, obtains secondary troostite tissue after heat treatment, tensile strength reaches 1500MPa, breaks
Elongation, the contraction percentage of area respectively reach 10%, 40% afterwards, ballistic work 28J.
As automobile is to the development trend of high-speed overload, lightweight and high reliability, it is desirable that improve Few Leaf Spring
Design stress, this just needs to further increase the performance of few leaf spring material, therefore improves intensity, the plasticity and toughness etc. of few leaf spring material
It is of great significance to the lightweight for realizing vehicle with high reliability.But by traditional quenching+average tempering technique
The intensity and plasticity and toughness of few leaf spring material can not be improved simultaneously, it is necessary to break through traditional technology to seek other approach.In recent years,
A lot of research work is carried out in terms of the high-strength tenacity for realizing few leaf spring material both at home and abroad, technical research mainly has two o'clock.
On the one hand high-intensitive few leaf spring new material is researched and developed using micro-alloying technology, i.e., by scientifically and rationally designing green wood
The chemical component of material substantially effectively plays the alloys producings such as C, Mn, Cr, V, Nb, Mo, Ni, by solution strengthening, carefully
Crystalline substance strengthens with schedule of reinforcements such as precipitation strengths the intensity and plasticity and toughness for improving new material.But it adds precious metal element, open
The factors such as hair period length can make new material, and increased production cost, this brings certain limitation to the popularization and application of new material,
Therefore high-intensitive few leaf spring new material is developed, it is necessary to take into account its economy while improving material property, finally
It can be received by users.On the other hand, traditional heat treatment process is improved for existing few leaf spring material, obtains geneva
Body+retained austenite heterogeneous structure significantly improves the intensity and plasticity and toughness of few leaf spring material, for example, by using advanced quenching-
(Q-P) technique is distributed, but this technique increases cost while improving material property.
Summary of the invention
In view of the above technical problems, the present invention is directed to the traditional handicrafts by improving few leaf spring, propose a kind of few piece of raising
The prestressing force isothermal hardening method of spring performance makes few leaf spring obtain the good fit of high intensity, high-ductility and high tenacity, thus greatly
Width improves the fatigue behaviour of few leaf spring, while simplifying the production procedure of few leaf spring, saves energy consumption.
The technical solution adopted by the present invention are as follows:
A kind of prestressing force isothermal hardening method for improving few leaf spring performance of the embodiment of the present invention, comprising the following steps:
S101, few leaf spring is heated to 860 DEG C~900 DEG C, brings it about complete austenitizing, obtain A sample；
S102, plastic deformation is brought it about to A sample application prestressing force, obtains B sample；
S103, B sample is immediately transferred to quench cooling 1min~3min in 240 DEG C~260 DEG C of quenching salt bath, is obtained
Obtain C sample；
S104, C sample is put into isothermal 120min~180min in 280 DEG C~320 DEG C of isothermal salt bath, obtains D sample
Product；
S105, D sample is taken out to air-cooled to room temperature few leaf spring after obtaining isothermal hardening.
Optionally, salt bath is quenched by 50% KNO in the quenching salt bath3, 48% NaNO2With 2% H2O group
At.
Optionally, the isothermal salt bath in the isothermal salt bath by 50% KNO3, 48% NaNO2With 2% H2O group
At.
The prestressing force isothermal hardening method provided in an embodiment of the present invention for improving few leaf spring performance, at least has following excellent
Point:
(1) after it will lack leaf spring heating austenitizing, applying prestressing force makes material that a degree of plastic deformation occur, then
Austenite recrystallizes, and refines austenite grain significantly, and the tissue after leading to quenching cooling phase-change is also refined.
(2) few quenching and isothermal processes of the leaf spring through salt bath, it is difficult to understand to obtain uniformly tiny lower bainite+martensite+remnants
The heterogeneous structure of family name's body makes few leaf spring obtain the good fit of high intensity, high-ductility and high tenacity.
(3) working hardening of few leaf spring and phase transformation strengthening are combined, that is, takes arc forming to combine with heat treatment, simplifies
The production procedure of few leaf spring, saves energy consumption, to bring significant economic benefit.
(4) few leaf spring carries out quenching cooling and isothermal processes using the salt bath of special composition, abandons traditional oil hardening
Processing, therefore oil smoke is not generated during heat treatment, and, surface small with part carry-over loss is easy cleaning, significantly improves life
Produce the working environment at scene.
Detailed description of the invention
Fig. 1 is the process signal of the prestressing force isothermal hardening method provided in an embodiment of the present invention for improving few leaf spring performance
Figure；
Fig. 2 is the microscopic structure using few leaf spring of traditional handicraft processing；
Fig. 3 is the microscopic structure using few leaf spring of the method for the present invention processing；
Fig. 4 is the fatigue S-N diagram, S-N curve using few leaf spring of traditional handicraft processing；
Fig. 5 is the fatigue S-N diagram, S-N curve using few leaf spring of the method for the present invention processing.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
As shown in Figure 1, the prestressing force isothermal hardening method provided in an embodiment of the present invention for improving few leaf spring performance, including with
Lower step:
S101, few leaf spring is heated to 860 DEG C~900 DEG C, brings it about complete austenitizing, obtain A sample；
S102, plastic deformation is brought it about to A sample application prestressing force, obtains B sample；
S103, B sample is immediately transferred to quench cooling 1min~3min in 240 DEG C~260 DEG C of quenching salt bath, is obtained
Obtain C sample；
S104, C sample is put into isothermal 120min~180min in 280 DEG C~320 DEG C of isothermal salt bath, obtains D sample
Product；
S105, D sample is taken out to air-cooled to room temperature few leaf spring after obtaining isothermal hardening.
Wherein, in step s101, few leaf spring is heated in controlled atmosphere generator.
In step s 102, certain prestressing force is applied to the A sample that step S101 is obtained using special fixture and makes A
Sample is plastically deformed under the prestressing force, to obtain B sample, obtained B sample is arcuation.
In step s 103,240 DEG C~260 DEG C of quenching salt bath can be used to carry out B sample as quenching medium
It is cooling.In an illustrative examples, it is described quenching salt bath in quenching salt bath can by 50% KNO3, 48% NaNO2With
2% H2O composition.
In step S104,280 DEG C~320 DEG C of isothermal salt bath can be used and carry out isothermal processes.Schematically implement one
In example, isothermal salt bath in the isothermal salt bath by 50% KNO3, 48% NaNO2With 2% H2O composition.
In embodiments of the present invention, a degree of plasticity change occurs few leaf spring after austenitizing for material under prestress
Shape, then austenite can recrystallize, and refine austenite grain significantly, and the tissue after leading to quenching cooling phase-change also obtains carefully
Change.Few leaf spring can get uniformly tiny lower bainite+martensite+retained austenite after the quenching of salt bath and isothermal processes
Heterogeneous structure, so that few leaf spring is obtained the good fit of high-intensitive, high-ductility and high tenacity.In addition, the needle that constant temperature process is formed
Shape lower bainite tissue Dislocations density is high, and distribution of carbides is uniform, and the spread is big, improves the intensity of few leaf spring and moulds tough
Property；In isothermal stage, carbon remains into room temperature and just forms residual austenite to generation diffusion and making it stable in austenite is not changed
Body tissue significantly improves the plasticity and toughness of few leaf spring；Quickly it is air-cooled during, have part do not change austenite occur martensite turn
Become, in this way, the martensitic structure of certain content guarantees that few leaf spring has high intensity.In addition, few leaf spring is taken arc by the present invention
Forming is combined with heat treatment, is simplified the production procedure of few leaf spring, has been saved energy consumption, to bring significant economic effect
Benefit.Also, in the present invention, few leaf spring carries out quenching cooling and isothermal processes using the salt bath of special composition, abandons traditional
Oil hardening processing, therefore oil smoke is not generated during heat treatment, and, surface small with part carry-over loss is easy cleaning, significantly
Improve the working environment of production scene.
[embodiment] below by material be 50CrMnVA steel few leaf spring for, to the excellent of isothermal hardening method of the invention
Point is illustrated.
The chemical component of few leaf spring in the present embodiment is as shown in table 1 below:
1 chemical component of table
| Chemical element | C | P | S | Mn | Si | Cr | V |
| Inspection result | 0.51 | 0.016 | 0.012 | 1.00 | 0.23 | 1.11 | 0.13 |
[embodiment 1]
In the present embodiment, traditional handicraft is respectively adopted to few leaf spring and method of the invention is handled, is then being handled
The tensile sample and impact specimen that processing criterion is sampled in few leaf spring afterwards carry out tension test, impact examination under room temperature
Test and hardness test, with measure few leaf spring material in different process treated regulation moulding extension strength, tensile strength, have no progeny
The performances such as elongation, the contraction percentage of area, ballistic work and hardness, specific test result are shown in Table 2.
Traditional handicraft: cooling → 450 DEG C of tempering heat preservation 150min of 860 DEG C of heating austenitizings → rapid quenching oil hardening →
For air-cooled or water cooling to room temperature, the secondary troostite tissue obtained after heat treatment is as shown in Figure 2.
The method of the present invention: 860 DEG C of heating austenitizings → special fixture applies → 240 DEG C of plastic deformation of prestressing force generation and quenches
It is air-cooled to room temperature that isothermal 120min in cooling 1min → 280 DEG C isothermal salt bath → quickly is quenched in fiery salt bath, after heat treatment
It is as shown in Figure 3 to obtain lower bainite+martensite+retained austenite heterogeneous structure.
2 performance test results of table
As shown in Table 2, compared with traditional handicraft, the regulation moulding of the method for the present invention treated few leaf spring material extends strong
Degree improves 17%, and tensile strength improves 16%, and elongation after fracture improves 14%, and the contraction percentage of area improves 17%, punching
It hits function and improves 43%, hardness improves 5HRC.It follows that through the method for the present invention, treated that few leaf spring material has is higher
Intensity, hardness and plasticity and toughness.
[embodiment 2]
In the present embodiment, traditional handicraft is respectively adopted to few leaf spring and method of the invention is handled, is then being handled
The tensile sample and impact specimen that processing criterion is sampled in few leaf spring afterwards carry out tension test, impact examination under room temperature
Test and hardness test, with measure few leaf spring material in different process treated regulation moulding extension strength, tensile strength, have no progeny
The performances such as elongation, the contraction percentage of area, ballistic work and hardness, specific test result are shown in Table 3.
Traditional handicraft: it is handled by embodiment 1.
The method of the present invention: 880 DEG C of heating austenitizings → special fixture applies → 250 DEG C of plastic deformation of prestressing force generation and quenches
Isothermal 150min in cooling 2min → 300 DEG C isothermal salt bath → quickly air-cooled to room temperature is quenched in fiery salt bath.
3 performance test results of table
As shown in Table 3, compared with traditional handicraft, the regulation moulding of the method for the present invention treated few leaf spring material extends strong
Degree improves 16%, and tensile strength improves 13%, and elongation after fracture improves 19%, and the contraction percentage of area improves 20%, punching
It hits function and improves 54%, hardness improves 4HRC.It follows that through the method for the present invention, treated that few leaf spring material has is higher
Intensity, hardness and plasticity and toughness.
[embodiment 3]
In the present embodiment, traditional handicraft is respectively adopted to few leaf spring and method of the invention is handled, is then being handled
The tensile sample and impact specimen that processing criterion is sampled in few leaf spring afterwards carry out tension test, impact examination under room temperature
Test and hardness test, with measure few leaf spring material in different process treated regulation moulding extension strength, tensile strength, have no progeny
The performances such as elongation, the contraction percentage of area, ballistic work and hardness, specific test result are shown in Table 4.
Traditional handicraft: it is handled by embodiment 1.
The method of the present invention: 900 DEG C of heating austenitizings → special fixture applies → 260 DEG C of plastic deformation of prestressing force generation and quenches
Isothermal 180min in cooling 3min → 320 DEG C isothermal salt bath → quickly air-cooled to room temperature is quenched in fiery salt bath.
4 performance test results of table
As shown in Table 4, compared with traditional handicraft, the regulation moulding of the method for the present invention treated few leaf spring material extends strong
Degree improves 14%, and tensile strength improves 12%, and elongation after fracture improves 14%, and the contraction percentage of area improves 21%, punching
It hits function and improves 57%, hardness improves 3.5HRC.It follows that through the method for the present invention, treated that few leaf spring material has more
High intensity, hardness and plasticity and toughness.
[embodiment 4]
In the present embodiment, traditional handicraft is utilized respectively to few leaf spring and method of the invention is handled, then in few piece
Tensile sample, impact specimen and the rotary bending fatigue sample that processing criterion is sampled on spring carry out stretching examination under room temperature
It tests, impact test and rotary bending fatigue performance test, to measure few leaf spring material in different process treated regulation moulding
The performances such as extension strength, tensile strength, elongation after fracture, the contraction percentage of area, ballistic work and fatigue limit, specific test result are shown in
Table 5, Fig. 4 and Fig. 5.
Traditional handicraft: it is handled by embodiment 1.
The method of the present invention: 860 DEG C of heating austenitizings → special fixture applies → 240 DEG C of plastic deformation of prestressing force generation and quenches
Isothermal 150min in cooling 2min → 300 DEG C isothermal salt bath → quickly air-cooled to room temperature is quenched in fiery salt bath.
5 performance test results of table
As shown in Table 5, compared with traditional handicraft, the regulation moulding of the method for the present invention treated few leaf spring material extends strong
Degree improves 16%, and tensile strength improves 13%, and elongation after fracture improves 19%, and the contraction percentage of area improves 23%, punching
It hits function and improves 50%, fatigue limit improves 15%.It follows that through the method for the present invention, treated that few leaf spring material has
Higher intensity and plasticity and toughness, fatigue limit are significantly improved, and comprehensive mechanical property is substantially better than traditional handicraft.
[embodiment 5]
In the present embodiment, traditional handicraft is utilized respectively to few leaf spring and method of the invention is handled, then surface is sprayed
Ball intensive treatment, and carry out rack fatigue life test to verify the reliability of few leaf spring, specific test result is as shown in table 6.
Traditional handicraft: it is handled by embodiment 1.
The method of the present invention: 900 DEG C of heating austenitizings → special fixture applies → 260 DEG C of plastic deformation of prestressing force generation and quenches
Isothermal 180min in cooling 3min → 320 DEG C isothermal salt bath → quickly air-cooled to room temperature is quenched in fiery salt bath.
6 rack test result of fatigue life of table
As shown in Table 6, compared with traditional handicraft, the Durability Test service life of the method for the present invention treated few leaf spring is mentioned
It is nearly 3 times high.It follows that through the method for the present invention, treated that few leaf spring has higher fatigue behaviour.
Embodiment described above, only a specific embodiment of the invention, to illustrate technical solution of the present invention, rather than
It is limited, scope of protection of the present invention is not limited thereto, although having carried out with reference to the foregoing embodiments to the present invention detailed
Illustrate, those skilled in the art should understand that: anyone skilled in the art the invention discloses
In technical scope, it can still modify to technical solution documented by previous embodiment or variation can be readily occurred in, or
Person's equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make corresponding technical solution
Essence is detached from the spirit and scope of technical solution of the embodiment of the present invention, should be covered by the protection scope of the present invention.Therefore,
The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. a kind of prestressing force isothermal hardening method for improving few leaf spring performance, which comprises the following steps:
S101, few leaf spring is heated to 860 DEG C~900 DEG C, brings it about complete austenitizing, obtain A sample；
S102, plastic deformation is brought it about to A sample application prestressing force, obtains B sample；
S103, B sample is immediately transferred to quench cooling 1min~3min in 240 DEG C~260 DEG C of quenching salt bath, obtains C
Sample；
S104, C sample is put into isothermal 120min~180min in 280 DEG C~320 DEG C of isothermal salt bath, obtains D sample；
S105, D sample is taken out to air-cooled to room temperature few leaf spring after obtaining isothermal hardening.
2. the method according to claim 1, wherein the quenching salt bath in the quenching salt bath is by 50%
KNO3, 48% NaNO2With 2% H2O composition.
3. the method according to claim 1, wherein the isothermal salt bath in the isothermal salt bath is by 50%
KNO3, 48% NaNO2With 2% H2O composition.
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| CN201910423805.XA CN110055380A (en) | 2019-05-21 | 2019-05-21 | A kind of prestressing force isothermal hardening method improving few leaf spring performance |
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| CN201910423805.XA CN110055380A (en) | 2019-05-21 | 2019-05-21 | A kind of prestressing force isothermal hardening method improving few leaf spring performance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964890A (en) * | 2019-12-23 | 2020-04-07 | 贵州大学 | Heat treatment method of high-hardness high-impact-toughness alloy material |
| CN111638148A (en) * | 2020-07-07 | 2020-09-08 | 一汽解放汽车有限公司 | Method for testing S-N curve of similar metal material |
| CN112725590A (en) * | 2020-12-18 | 2021-04-30 | 苏州轴承厂股份有限公司 | Manufacturing method for low deformation of spring steel |
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| JPS63121621A (en) * | 1986-11-11 | 1988-05-25 | Nisshin Steel Co Ltd | Production of bainite steel sheet having excellent spring characteristic |
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| JPS63121621A (en) * | 1986-11-11 | 1988-05-25 | Nisshin Steel Co Ltd | Production of bainite steel sheet having excellent spring characteristic |
| CN101597680A (en) * | 2009-07-09 | 2009-12-09 | 贵州大学 | Train 60Si2CrVA steel spring goods quenching-distribution thermal treatment process |
| CN102676934A (en) * | 2012-06-08 | 2012-09-19 | 冯斌 | Preparation method of 55Si2Mn alloy steel |
| CN104404220A (en) * | 2014-11-06 | 2015-03-11 | 无锡市百顺机械厂 | 60Si2Mn steel spring heat treatment method |
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| 文九巴主编: "《材料科学与工程》", 31 August 2007, 哈尔滨工业大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964890A (en) * | 2019-12-23 | 2020-04-07 | 贵州大学 | Heat treatment method of high-hardness high-impact-toughness alloy material |
| CN111638148A (en) * | 2020-07-07 | 2020-09-08 | 一汽解放汽车有限公司 | Method for testing S-N curve of similar metal material |
| CN111638148B (en) * | 2020-07-07 | 2022-08-12 | 一汽解放汽车有限公司 | Method for testing S-N curve of similar metal material |
| CN112725590A (en) * | 2020-12-18 | 2021-04-30 | 苏州轴承厂股份有限公司 | Manufacturing method for low deformation of spring steel |
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