012AI钢齿轮精锻模失效分析  

Failure Analysis on 012AI Steel Finish Forging Die for Gear

作　　者：李振[1] 欧耀辉 秦建军 胡树兵[1] 赵红军 赵军华 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]三一重工集团,湖南长沙410100 [3]江苏太平洋精锻科技有限公司,江苏姜堰225500

出　　处：《热处理》2012年第3期79-83,共5页Heat Treatment

摘　　要：012AI钢制齿轮精锻模在使用中早期失效。采用宏观检验、金相检验和硬度测试等方法分析了模具的失效原因。结果表明,模具的早期失效主要是由于离子渗氮层较浅,脆性较大,以及存在脉状氮化物等缺陷所致。针对上述原因,提出了相应的改进措施。The metallographic that premature finish forging die for gear, examinations and hardness test failure of the die arises mainly made of 012A1 steel, failed early in service. Macroscopic and were performed to reveal the causes of die failure. The results show from more shallow and britller ion-nitrided case and such defects as vein nitride and so on present in the case. The corresponding measures to improve on the die quality were put forward.

关 键 词：精锻模 渗氮层 热疲劳 失效 

分 类 号：TG115.2[金属学及工艺—物理冶金]