摘要
通过宏观检验、微观检验、显微硬度测定及化学成分分析等方法,对45钢搬手头产生裂纹的原因进行分析。结果表明,搬手头内六方处的裂纹,是尖角效应引起应力集中而产生的应力集中裂纹;垂直于轴线的裂纹是因为淬火快速冷却时,厚壁处未淬透以及截面尺寸突变产生的弧形裂纹。
Through macroscopic methods,microscopic examination,micro hardness measurement and chemical composition analysis,the reason of quenched crack of 45 steel move-on-hand was analyzed.The results show that the crack of the department within the six-party of the move-on-hand is caused by stress concentration on the acute angle effect.Crack perpendicular to the axis is caused on too rapid quench cooling,non-hardenability of the thick-walled department,as well as mutation of cross-section size.This is a typical arc-shaped crack.
出处
《热加工工艺》
CSCD
北大核心
2010年第4期162-163,166,共3页
Hot Working Technology
关键词
搬手头
淬火裂纹
弧形裂纹
尖角效应
应力集中
move-on-hand
hardening crack
arc-shaped crack
acute angle effect
stress concentration
