W18Cr4V钢制滚刀离子氮化脆性剥落研究  

Research on Ion Nitriding Brittle Spalling of W18Cr4V Steel Hob

作　　者：高美兰[1] 白树全[1] 孙杰 

机构地区：[1]包头职业技术学院材料工程系,内蒙古包头014035 [2]北方重工集团公司,内蒙古包头014035

出　　处：《铸造技术》2013年第3期297-298,共2页Foundry Technology

摘　　要：针对W18Cr4V钢制滚刀使用过程中在滚刀棱角处出现厚度约为0.05～0.07 mm的脆性剥落现象,对滚刀热处理工艺、显微组织和硬度进行了分析。结果表明,滚刀的脆性剥落是离子氮化温度过高,保温时间过长,表面清理不干净等原因造成。通过调整离子氮化工艺,将原来的离子氮化温度由600℃降低到570℃,适当缩短保温时间等措施,防止了脆性剥落现象的再次发生。Aimed at the brittle spalling phenomenon of a thickness of about 0.05- 0.07 mm at edges and comers of W l 8Cr4V steel hobs in use, the heat treatment process, microstructure and hardness of the hobs was analyzed. The results show that the brittle spalling of hob results from that ion nitriding temperature is too high, holding time is too long, surface cleaning is not clean and so on. By adjusting the ion nitriding processs, decreasing ion nitriding temperature from original 600 ℃ to 570 ℃, appropriate to shorten the holding time, the brittle spalling phenomenon was prevented from happening again.

关 键 词：W18CR4V 离子氮化 脆性剥落 

分 类 号：TG156.82[金属学及工艺—热处理]