P20预硬塑料模具断裂原因分析  

Crack Failure Analysis of P20 Pre-hardened Plastic Die

作　　者：任丽宏[1] 宗铎[1] 侯彩云[1] 张晨东[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《热加工工艺》2010年第13期187-189,共3页Hot Working Technology

摘　　要：采用热处理工艺,化学成分分析、力学性能、金相检验及综合分析等方法对P20模具断裂原因进行分析。结果表明:模具材料中硫化物夹杂含量较高且尺寸偏大,同时存在锻造时模具中产生的带状组织,二者共同作用导致模具断裂。The crack failure of P20 die was analyzed by heat treatment process, chemical composition checking, mechanical properties, metallography inspection. The results show that there are large contents of sulphides inclusions with higher size in the die material. The lamellar structure also exists in the die. The combination of them leads to the crack of the die.

关 键 词：P20 硫化物夹杂 带状组织 断裂 

分 类 号：TG111.91[金属学及工艺—物理冶金]