60Si2Mn弹簧钢疲劳裂纹扩展规律研究  

Study on Fatigue Crack Propagation of 60Si2Mn Spring Steel

作　　者：黄俊 伍曾[1] 张荣茂 马薇 HUANG Jun;WU Zeng;ZHANG Rongmao;MA Wei(Faculty of Civil Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《铸造技术》2022年第8期690-693,共4页Foundry Technology

基　　金：国家自然科学基金(51868033)。

摘　　要：对于材料的疲劳裂纹扩展速率,国标给出了割线法和递增多项式法两种数据处理方法。本文就国外学者提出的Smith法对比国标推荐的割线法和七点递增多项式法,采用成组数据处理方式,探索了热处理前后60Si2Mn弹簧钢疲劳裂纹扩展速率的变化规律。结果表明,七点递增多项式法可以更好地反应材料的疲劳裂纹扩展速率,热处理后60Si2Mn弹簧钢的疲劳裂纹扩展曲线更加平缓,抗疲劳裂纹扩展性能明显提升。The secant method and increasing polynomial method are used to deal with the fatigue crack growth rate. In this paper, the change law of fatigue crack growth rate of 60Si2Mn spring steel before and after heat treatment was studied by comparing Smith method with secant method and seven-point increasing polynomial method recommended by national standard. The results show that the seven-point increasing polynomial method can better reflect the fatigue crack growth rate of materials. After heat treatment, the fatigue crack growth curve of 60Si2Mn spring steel is more gentle, and the anti-fatigue crack growth performance is obviously improved.

关 键 词：热处理 60SI2MN钢 七点递增多项式法 割线法 Smith法 疲劳裂纹扩展 

分 类 号：TG113.255[金属学及工艺—物理冶金]