42CrMo钢阀体内孔表面裂纹缺陷分析  

Analysis of Surface Crack Defects in 42CrMo Steel Body

作　　者：孙远伟 尹衍成 SUN Yuanwei;YIN Yancheng(The Round Research Institute of Qingdao Special Steel Company,Qingdao 266400,China)

机构地区：[1]青岛特殊钢铁有限公司,山东青岛266400

出　　处：《山东冶金》2020年第5期7-8,11,共3页Shandong Metallurgy

摘　　要：通过宏观及微观分析手段对42CrMo钢阀体内孔表面裂纹开裂原因进行分析。结果表明:铸造缺陷、非金属夹杂物含量较多、调质处理温度过高、保温时间较长,以致形成粗大珠光体和大量的魏氏组织是造成锻件开裂的主要原因,应力过大导致了锻件的开裂。By means of macroscopic and microscopic analysis,the cause of crack cracking on the inner hole surface of 42CrMo steel body was analyzed.The results show that:cast defects,more non-metallic inclusions,too high tempering temperature,longer insulation time,resulting in the formation of large pearlite and the large amount of weissner's structure is the main cause of forging cracking.Too much stress caused the forging to crack.

关 键 词：42CrMo 裂纹 非金属夹杂 魏氏组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]