PH13-8Mo钢的离子渗氮工艺  

Ion nitriding process of PH13-8Mo steel

作　　者：张毅 孟璇 朱志强 赵志鹏 仝威 武瑞刚 王锦 Zhang Yi;Meng Xuan;Zhu Zhiqiang;Zhao Zhipeng;Tong Wei;Wu Ruigang;Wang Jin(Shanxi Aerospace Qinghua Equipment Co.,Ltd.,Changzhi Shanxi 046012,China;Military Representative Office of PLA Equipment Department in Ghangzhi Area,Changzhi Shanxi 046012,China)

机构地区：[1]山西航天清华装备有限责任公司,山西长治046012 [2]火箭军装备部驻长治地区军事代表室,山西长治046012

出　　处：《金属热处理》2020年第12期119-122,共4页Heat Treatment of Metals

摘　　要：对PH13-8Mo钢离子渗氮工艺参数进行了研究,其中包括渗氮温度、渗氮时间及渗氮件表面粗糙度。结果表明:随渗氮温度的升高、渗氮时间的延长、零件表面粗糙度的降低,PH13-8Mo钢渗氮层厚度增加;渗氮零件表面粗糙度对渗氮层脆性等级影响较大,渗氮零件表面粗糙度为6.3μm时,其脆性等级达到Ⅲ级;渗氮时间、渗氮温度及零件表面粗糙度对渗氮层硬度影响甚微。渗氮温度540℃,渗氮时间22 h,零件表面粗糙度0.8μm时,PH13-8Mo钢可获得良好的渗氮层,渗氮层厚度可达197.5μm,渗氮层硬度可达1083 HV0.2,脆性等级为Ⅱ级。Plasma nitriding process parameters of PH13-8 Mo steel were studied,including nitriding temperature,nitriding time and surface roughness of parts.The results show that with the increase of nitriding temperature,nitriding time and the decrease of surface roughness,the nitrided layer thickness of the PH13-8 Mo steel increases.The surface roughness of parts has great influence on the brittleness grade of nitrided layer,when the surface roughness of parts is 6.3μm,the brittleness grade reaches grade III.Nitriding time,nitriding temperature and surface roughness have little effect on the hardness of nitrided layer.When the nitriding temperature is 540℃,the nitriding time is 22 h,and the surface roughness of parts is 0.8μm,the nitrided layer thickness can reach 197.5μm,the nitrided layer hardness can reach 1083 HV0.2,and the brittleness grade is grade II.

关 键 词：PH13-8Mo钢 渗氮工艺 粗糙度 渗氮层厚度 渗氮层硬度 脆性等级 

分 类 号：TG156.82[金属学及工艺—热处理]