摘要
介绍了盲孔法测量铸件残余应力的基本原理和主要步骤。比较了缸体热处理前后、抛丸前后测得的残余应力数据。结果表明:(1)经过热处理后,铸件的最大主应力消除率平均达到41%,最大主应力总平均峰值消除率为49.8%;(2)抛丸后压应力提高,有利于平衡铸件的拉应力,减少裂纹倾向,提高铸件的抗疲劳性能和力学性能。
The basic principle of measuring residual stress with blind bore method and the main measuring steps were introduced.The residual stress test data of the cylinder block before and after heat treatment,as well as before and after shot blasting were compared.The result showed:(a) after the casting having been heat-treated,the average eliminating rate of its maximum principal stress reached 41%,the general average eliminating rate of peak value of maximum principal stress was of 49.8%;(b) after shot blasting,the compressive stress increased that is beneficial to counterbalance the tensile stress of the casting,reduce cracking tendency and increase the anti-fatigue properties and mechanical properties of the casting.
出处
《现代铸铁》
CAS
2009年第5期82-85,共4页
Modern Cast Iron
关键词
160缸体
残余应力
盲孔法
160 cylinder block
residual stress
blind bore method
作者简介
李璐(1974.11-),男,汉族,山东人,毕业于佳木斯大学铸造专业,现为山东大学材料学院在职工程硕士,工程师,主要从事铸造工艺、质量和设备管理工作.
