摘要
通过对 45钢疲劳损伤恢复机理及其规律研究 ,再现疲劳损伤发展过程中的微观组织结构变化。分析了回火温度对疲劳损伤恢复的作用 ,发现选择回火温度具有“阈值性”。当回火温度与阈值相吻合时 ,可改变材料的微观结构组态 ,降低材料的脆性 ,采用盐浴回火可减少热处理恢复金属材料疲劳损伤引起的变形 ,并使
By means of Study on the mechanism to recover fatigue damage in 45 steel by heat treatment, discovered the changes in micro morphology of the materials during developing procedure of fatigue damage. It was analyzed that the effect of the temperature selected in order to recover the fatigue damage in the materials during tempering. It was found that there is a temperature threshold during heat treatment to the materials. When the temperature is the same as the threshold, the microscopic structure of the materials can be changed, and its brittleness will be decreased by tempering. Samples are tempered in salt bath, in order to reduce the distortion. By this kind of tempering, the fatigue life of 45 steel can be prolonged remarkably.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2001年第3期362-364,304,共4页
Journal of Mechanical Strength
基金
辽宁省教委自然科学基金资助项目 (992 4 2 1 62 5)~~
关键词
45钢
碳钢
疲劳损伤
热处理
steel
Carbon steel
Fatigue damage
Heat treatment
Recover
