接头淬火开裂原因分析  

Analysis of Cracking in Joint After Quenching

作　　者：姚永红[1] 

机构地区：[1]陕西工业职业技术学院材料工程系,陕西咸阳712000

出　　处：《热加工工艺》2010年第16期182-183,185,共3页Hot Working Technology

摘　　要：采用宏观、微观检验、硬度测试及能谱分析等手段,对45钢接头调质后产生裂纹的原因进行分析,发现显微组织中存在着严重的带状偏析、非金属夹杂物、奥氏体晶粒大小不均匀以及工件未淬透等缺陷。结果表明,工件未淬透及严重的带状偏析导致45钢接头调质后产生了弧形裂纹。The reasons for crack of 45 steel joint after quenching and tempering was analyzed by macro and micro structure test,hardness test and energy spectral analysis and so on.There are such defects such as the heavy band segregation,non-metallic inclusions,heterogeneous austenite grains and non-hardened.The results show that the arc-shaped cracks are caused by joint non-hardened and the critical non-metallic inclusions in the raw materials.

关 键 词：45钢接头 带状偏析 弧形裂纹 

分 类 号：TG156.7[金属学及工艺—热处理]