穿孔机顶头表面开裂原因分析  

CRACKING ANALYSIS ON THE SURFACE OF PUNCH TOP

作　　者：许宏飞[1] 张永信[1] 李志光 

机构地区：[1]中国兵器工业第五二研究所烟台分所,烟台264003 [2]烟台市工业炉厂,烟台264100

出　　处：《理化检验（物理分册）》2007年第10期525-527,539,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：利用扫描电镜和背散射电子像(BS)等手段对未经使用的3Cr2W8V钢穿孔机顶头表面开裂裂纹进行了显微观察与分析。结果表明,由于材料中存在区域性的共晶碳化物偏聚现象,导致了在锻造过程中顶头表面出现开裂裂纹。The cracking on the surface of the unused 3Cr2W8V steel punch top was observed and analyzed with the back scattered electron image of SEM. Results showed that there was the phenomena of the eutectic carbide segregation in local area of material, so that the surface crack propagate during forging process.

关 键 词：3CR2W8V钢 穿孔机顶头 裂纹 共晶碳化物 

分 类 号：TG333.8[金属学及工艺—金属压力加工]