Spring steel with good heat resistance and impact resistance and production method thereof

A production method and impact-resistant technology, applied in the field of spring steel production, can solve the problems of poor performance of spring steel, difficult to meet, poor tensile strength, impact resistance and hydrogen embrittlement fracture resistance, etc., to ensure strength, toughness and durability Effect of hydrogen embrittlement fracture performance, improvement of strength and toughness, and good heat resistance

Active Publication Date: 2020-09-22
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the relatively poor performance of existing spring steel not only at room temperature, but also at high temperature and high pressure conditions, its tensile strength, impact resistance and hydrogen embrittlement resistance are poor, so it is difficult to meet its requirements. Insufficient for use under special high temperature and high pressure conditions, providing a spring steel with good heat resistance and shock resistance and its production method

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  • Spring steel with good heat resistance and impact resistance and production method thereof
  • Spring steel with good heat resistance and impact resistance and production method thereof
  • Spring steel with good heat resistance and impact resistance and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0063]The chemical composition of the spring steel of this embodiment is: C: 0.50%, Si: 1.60%, Mn: 0.80%, Cr: 0.80%, Mo: 0.4%, W: 0.70%, V: 0.20%, Nb: 0.02 %, Ti: 0.015%, Ni: 0.20%, Cu: 0.20%, P: 0.015%, S: 0.010%, O: 0.0012%, N: 0.006%, and the rest are Fe and other unavoidable impurities. Wherein, P value = 1.75, Meq value = 0.312.

[0064] Its processing step adopts the technical process of the present invention, and the control parameters of its wire rod rolling related technical process are as follows: figure 1 Shown, and then its normal temperature mechanical properties, high temperature mechanical properties, hydrogen embrittlement resistance were tested, the results are shown in figure 2 , image 3 and Figure 4 .

Embodiment 2

[0066] The chemical composition of the spring steel of this embodiment is: C: 0.60%, Si: 2.00%, Mn: 1.00%, Cr: 1.30%, Mo: 0.50%, W: 1.30%, V: 0.40%, Nb: 0.04 %, Ti: 0.030%, Ni: 0.15%, Cu: 0.15%, P: 0.015%, S: 0.010%, O: 0.0012%, N: 0.006%, and the rest are Fe and other unavoidable impurities. Wherein, P value = 2.6, Meq value = 0.282.

[0067] Its processing step adopts the technical process of the present invention, and the control parameters of its wire rod rolling related technical process are as follows: figure 1 Shown, and then its normal temperature mechanical properties, high temperature mechanical properties, hydrogen embrittlement resistance were tested, the results are shown in figure 2 , image 3 and Figure 4 .

Embodiment 3

[0069] The chemical composition of the spring steel of this embodiment is: C: 0.56%, Si: 2.20%, Mn: 0.90%, Cr: 1.00%, Mo: 0.20%, W: 0.80%, V: 0.30%, Nb: 0.02 %, Ti: 0.020%, Ni: 0.30%, Cu: 0.30%, P: 0.015%, S: 0.009%, O: 0.0011%, N: 0.003%, and the rest are Fe and other unavoidable impurities. Wherein, P value = 4.0, Meq value = 0.343.

[0070] Its processing step adopts the technical process of the present invention, and the control parameters of its wire rod rolling related technical process are as follows: figure 1 Shown, and then its normal temperature mechanical properties, high temperature mechanical properties, hydrogen embrittlement resistance were tested, the results are shown in figure 2 , image 3 and Figure 4 .

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Abstract

The invention discloses spring steel with good heat resistance and impact resistance and a production method thereof, and belongs to the technical field of spring steel production. The spring steel comprises the following chemical components of, in percentage by weight, 0.50 %-0.60 % of C, 1.60 %-2.20 % of Si, 0.80 %-1.00 % of Mn, 0.80 %-1.30 % of Cr, 0.20 %-0.50 % of Mo, 0.70 %-1.30 % of W, 0.20%-0.40 % of V, 0.02 %-0.04 % of Nb, 0.015 %-0.030 % of Ti, 0.15 %-0.30 % of Ni, 0.15 %-0.30 % of Cu, trace-0.015 % of P, trace-0.010 % of S, less than or equal to 0.0012 % of O, less than or equal to0.006 % of N and the balance Fe and other inevitable impurities. The production method of the spring steel comprises the steps of electric arc furnace smelting, LF furnace refining, RH or VD vacuum degassing, round billet continuous casting, square billet rolling, flaw detection, scaling, high-speed wire rod controlled rolling, stelmor cooling wire controlled cooling treatment and heat treatment.According to the technical scheme, the obtained spring steel has good heat resistance, impact resistance and hydrogen embrittlement fracture resistance, and therefore the use requirements of the spring steel at high temperature and high pressure can be effectively met.

Description

technical field [0001] The invention belongs to the technical field of spring steel production, and more specifically relates to a spring steel with good heat and shock resistance and a production method thereof. Background technique [0002] Spring steel has excellent comprehensive mechanical properties and elastic resistance, so it is widely used in key fields of the national economy such as automobiles, aviation and military. In recent years, all walks of life are facing tremendous pressure to save energy and reduce costs. From the perspective of energy saving and economy, the demand for spring weight reduction is increasing. It is imperative to develop new ultra-high-strength spring steel, especially in the face of train speed increase, The development of lightweight aircraft requires springs to increase strength, reduce weight, and increase life. [0003] However, the traditional method is to increase the strength by changing the heat treatment temperature, but the duc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C21D8/06C22C33/04
CPCC22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C33/04C21D8/065
Inventor 汪开忠张晓瑞于同仁姜婷尹德福龚梦强余良其丁雷郭湛孙凯吴建曦牟祖茂郝震宇
Owner MAANSHAN IRON & STEEL CO LTD
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