冷挤压模具开裂失效分析  

Craking Analysis of High-speed Steel Die

作　　者：卢金斌[1] 张文勇[1] 张太超[1] 张鬲军[1] 张照军[1] 

机构地区：[1]中原工学院材料与化学工程系,河南郑州450007

出　　处：《热加工工艺》2006年第12期70-71,共2页Hot Working Technology

摘　　要：高速钢模具在使用过程中出现早期开裂。采用光镜、化学成分分析和硬度测试等方法,对模具材料进行了检测和分析。结果表明,原材料质量差,且在锻打过程中锻打不充分致碳化物呈带状分布、碳化物粗大且棱角状,使得材料力学性能差。模具在随后使用过程中,由于交变载荷的作用,使碳化物的棱角处应力集中出现裂纹,最终导致模具开裂。Crack of High-speed steel die was discovered on the using. By means of the metallographical examination, chemical analysis and hardness measurement, die cracking was analyzed. The result shows that the quality of original material is poor quality, and defect are occurred during forging of die, these factors cause the stress in the die and the surface stress produced on line incision are combined.

关 键 词：模具 碳化物 脆性开裂 

分 类 号：TG162.4[金属学及工艺—热处理]