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Steel plate spring material for automobile and heat treatment technology of steel plate spring material

A leaf spring and automobile technology, which is applied in the field of spring steel, can solve the problems that cannot meet the requirements of tempering stability and toughness at the same time, and achieve the effect of improving tempering stability, strength and toughness, and fatigue performance

Inactive Publication Date: 2018-06-15
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems in the prior art that cannot meet the requirements of tempering stability and toughness at the same time, and provide a leaf spring material for automobiles with excellent tempering stability and toughness and its heat treatment process

Method used

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  • Steel plate spring material for automobile and heat treatment technology of steel plate spring material
  • Steel plate spring material for automobile and heat treatment technology of steel plate spring material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A leaf spring material for automobiles, its composition and mass percentage content are: C 0.53%, Si 0.20%, Mn0.83%, Cr 0.96%, Ti 0.015%, Al 0.016%, N 0.0051%, B 0.0016%, P 0.019%, S0.005%, and the rest are Fe and unavoidable impurities.

[0021] The heat treatment process of the above-mentioned leaf spring material for automobiles specifically includes: first quenching the material at 820-920°C, and then tempering the quenched material at 400-510°C.

Embodiment 2

[0023] Step is with embodiment 1, and difference is:

[0024] The composition and mass percentage of the material are: C 0.57%, Si 0.40%, Mn 1.00%, Cr 1.05%, Ti 0.010%, Al 0.010%, N 0.0062%, B 0.0005%, P 0.017%, S 0.007 %, the rest is Fe and unavoidable impurities.

Embodiment 3

[0026] Step is with embodiment 1, and difference is:

[0027] The composition and mass percentage content of the material are: C 0.51, Si 0.17, Mn 1.20, Cr 0.80%, Ti0.025%, Al 0.030%, N 0.0075%, B 0.0027%, P 0.020%, S 0.010%, the rest For Fe and unavoidable impurities.

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Abstract

A steel plate spring material for an automobile comprises components including, by mass percent, 0.47%-0.57% of C, 0.10%-0.40% of Si, 0.70%-1.20% of Mn, 0.80%-1.20% of Cr, 0.010%-0.030% of Ti, 0.010%-0.035% of Al, 0.005%-0.009% of N, 0.0005%-0.004% of B, smaller than or equal to 0.025% of P, smaller than or equal to 0.025% of S and the balance Fe and inevitable impurities. According to the material heat treatment technology, the material is subjected to quenching treatment at the temperature ranging from 820 DEG C to 920 DEG C, and tempering treatment is conducted at the temperature ranging from 400 DEG C to 510 DEG C. The steel plate spring material has excellent tempering stability and toughness, and the requirement of the material heat treatment technology can be lowered.

Description

technical field [0001] The invention belongs to the technical field of spring steel, and specifically relates to a leaf spring material for automobiles and a heat treatment process thereof, which is suitable for the production of leaf springs with a reed thickness not exceeding 37 mm, and can effectively improve the tempering stability, strength and toughness of the material and the steel plate Spring fatigue properties. Background technique [0002] Spring steel is a steel specially used to manufacture springs and elastic elements according to their elasticity in the quenched and tempered state. The elasticity of steel depends on its ability to deform elastically, that is, within a specified range, the ability to deform elastically allows it to withstand a certain load without permanent deformation after the load is removed. [0003] Spring steel should have excellent comprehensive properties, such as mechanical properties (especially elastic limit, strength limit, yield r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C22C38/06C22C38/32C21D1/18C21D9/02
CPCC21D1/18C21D9/02C22C38/02C22C38/04C22C38/06C22C38/28C22C38/32
Inventor 蒋路军瞿海锦高亮庆张宇郭朝阳
Owner DONGFENG COMML VEHICLE CO LTD
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