H13钢模具零件开裂原因分析  

Analysis of cracking in die component made of H13 steel

作　　者：张彦文[1] 陈雪艳[1] 许竹桃[1] 张友登[1] 陶勇[2] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080 [2]武汉钢铁(集团)公司研究院质检中心,湖北武汉430080

出　　处：《模具工业》2014年第10期62-65,共4页Die & Mould Industry

摘　　要：H13钢模具零件在使用过程中开裂为多块。为弄清开裂原因,通过宏观观察、扫描电镜及能谱分析、金相组织分析等方法对开裂零件进行了深入分析,结果表明:零件表面渗层呈网络状,导致脆性增加,在应力作用下,产生较多表面裂纹并逐渐扩展,最终导致零件开裂失效。为了减轻或消除零件表面网状渗层,可通过严格控制碳氮共渗工艺等途径加以解决。A die component made of H13 steel suddenly cracked to pieces in the working process. In order to find how it fractured, the broken sample was deeply studied by macro-scopic observation, SEM, X-ray energy spectrometer and metallography microscope. The re-sult shows that nitriding layer is reticulate which makes the superficial structure crisp. Un-der the stress, more surface fractures generated and extended and finally led to the crack-ing failure. In order to reduce or eliminate network cementite, carbonnitriding process should be controlled strictly.

关 键 词：H13钢 模具零件 开裂 碳氮共渗 扩散退火 

分 类 号：TG76[金属学及工艺—刀具与模具] TG156.8