摘要
采用化学成分分析、金相显微镜、扫描电镜及能谱仪等分析手段分析了45钢销轴经机加工后出现的表面发纹。结果表明:原材料中含有的大颗粒夹杂物是产生发纹的主要原因,夹杂物在轧制过程中沿轧制方向延伸,在随后的机加工过程中暴露出来。通过保护浇铸与防止卷渣等技术可减少此类缺陷的产生。
The caplillary crack on surface of 45 steel pin shaft after machining was analyzed by means of chemical composition analysis,metallographic examination,SEM and energy spectrometer.The results show that the main cause forming the caplillary crack was the inclusion along raw material.The inclusions extend along the rolling direction during rolling and exposed during subsequent machining.The generation of such defects can be reduced by techniques such as protective casting and preventive slag rolling.
作者
钟芳华
李娟
刘年富
钟凡
吴学兴
ZHONG Fang-hua;LI Juan;LIU Nian-fu;ZHONG Fan;WU Xu-xing(Baowu Group Guangdong Shaoguan Iron and Steel Co.,Ltd.,Shaoguan Guangdong512123,China;Guangdong Kunlun Technology Integration Co.,Ltd.,Shaoguan Guangdong512123,China)
出处
《热处理技术与装备》
2019年第2期14-17,共4页
Heat Treatment Technology and Equipment
关键词
45钢
销轴
发纹
夹杂物
45 steel
pin shaft
capillary crack
inclusion
