65Si2MnWA钢螺旋压缩弹簧的应力松弛行为与组织演变

doi:10.13251/j.issn.0254-6051.2025.06.014

金属热处理 ›› 2025, Vol. 50 ›› Issue (6): 89-94.DOI: 10.13251/j.issn.0254-6051.2025.06.014

65Si2MnWA钢螺旋压缩弹簧的应力松弛行为与组织演变

郭斯源¹, 罗巍², 徐登伟², 张腾², 宋达¹, 师春生¹

1.天津大学材料科学与工程学院, 天津 300350;
2.西安航天动力研究所, 陕西西安 710100

收稿日期:2024-12-13 修回日期:2025-03-26 出版日期:2025-06-25 发布日期:2025-07-08
通讯作者: 师春生,教授,博士,E-mail:csshi@tju.edu.cn
作者简介:郭斯源(1995—),男,博士研究生,主要研究方向为金属基复合材料及失效分析,E-mail:syguo@tju.edu.cn。

Stress relaxation behavior and microstructure evolution of 65Si2MnWA steel helical compression spring

Guo Siyuan¹, Luo Wei², Xu Dengwei², Zhang Teng², Song Da¹, Shi Chunsheng¹

1. School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China;
2. Xi'an Aerospace Propulsion Institute, Xi'an Shaanxi 710100, China

Received:2024-12-13 Revised:2025-03-26 Online:2025-06-25 Published:2025-07-08

摘要/Abstract

摘要： 对65Si2MnWA钢螺旋压缩弹簧进行不同温度下的应力松弛试验,并利用透射电镜对弹簧在160 ℃下松弛不同时间的微观组织进行表征。结果表明,随着应力松弛试验温度提高,弹簧的应力松弛过程加速,所得松弛方程具有较高的拟合精度,相关系数均在0.900以上。依据Arrhenius关系建立了该弹簧室温贮存条件下的应力松弛方程:ΔF/F₀=0.0019+0.0017lnt,利用该模型预测弹簧贮存10年的负荷损失率为2.1%。该弹簧在160 ℃松弛过程中组织较为稳定,与松弛前组织基本相同,为回火屈氏体,表明具有较好的松弛稳定性。

关键词: 65Si2MnWA钢, 螺旋压缩弹簧, 应力松弛, 微观组织

Abstract: Stress relaxation tests were conducted on 65Si2MnWA steel helical compression spring at different temperatures, and the microstructure of the spring at 160 ℃ for different relaxation time was characterized by means of transmission electron microscope. The results indicate that with the increase of stress relaxation temperature, the stress relaxation process of the spring accelerates, and the obtained relaxation equation has high fitting accuracy, with correlation coefficients over 0.900. According to the Arrhenius relation, the stress relaxation equation of the spring at room temperature storage conditions can be established as ΔF/F₀=0.0019+0.0017lnt. Using the model, the load loss rate of the spring after 10 years of storage is predicted to be 2.1%. The microstructure of the 65Si2MnWA steel spring during relaxation at 160 ℃ is relatively stable, which is basically the same as that before relaxation, and it is tempered troostite structure, indicating good relaxation stability.

Key words: 65Si2MnWA steel, helical compression spring, stress relaxation, microstructure

中图分类号:

TG142.75

郭斯源, 罗巍, 徐登伟, 张腾, 宋达, 师春生. 65Si2MnWA钢螺旋压缩弹簧的应力松弛行为与组织演变[J]. 金属热处理, 2025, 50(6): 89-94.

Guo Siyuan, Luo Wei, Xu Dengwei, Zhang Teng, Song Da, Shi Chunsheng. Stress relaxation behavior and microstructure evolution of 65Si2MnWA steel helical compression spring[J]. Heat Treatment of Metals, 2025, 50(6): 89-94.

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65Si2MnWA钢螺旋压缩弹簧的应力松弛行为与组织演变

Stress relaxation behavior and microstructure evolution of 65Si2MnWA steel helical compression spring

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