摘要
对比了分别经可控渗氮、离子注入形成 Ti N及可控渗氮 +离子注入 Ti2 + 后 ,M2高速钢精冲模的使用寿命。结果表明 ,采用可控渗氮 +离子注入 Ti2 +的复合处理工艺 ,可使零件的使用寿命获得明显提高。断口分析、表面硬度测试、金相分析、XRD和 AES分析表明 ,寿命的提高是由于 :( 1 )用 Jonsson经验公式算得的该 Ti N注入层的真实硬度为 HV30 0 0 ,Ti N的超高硬度是寿命提高的根本原因 ;( 2 )该复合工艺可使 M2高速钢表面 Ti N注入层获得较厚较硬的氮化过渡层 ,增强了膜基间的结合力 ,从而提高了零件的抗磨损和抗冲击性能 ;( 3)渗氮层增加了钛离子的注入深度 ,获得了更宽的 Ti N改性层 ,用 JT- PR 所得到的模拟计算结果与此吻合得很好。
The life experiments of W6Mo5Cr4V2 high speed steel dies treated respectivelly by controlled nitriding、 ion implantation with Ti 2+ +N 2+ and a combined technique of controlled nitriding and implantation with Ti 2+ were made The result shows that, compared with other two techniques, the combined technique can improve the life of the dies by a large margin Besides the ultrahigh hardness of TiN coating, the thicker and harder nitriding layer, which transited from TiN coating to substrate of M2 high speed steel, contributes greatly to the life improvement The transition layer not only strengthens the binding force between coating and substrate, but also widens the depth of implanted Ti 2+ ion which leads to a thicker TiN modification layer and consists with the computer simlation result of JT PRⅡ software developed by oursleves
出处
《机械工程材料》
CAS
CSCD
北大核心
2001年第2期14-17,共4页
Materials For Mechanical Engineering
关键词
离子注入
高速钢
计算机模拟
表面复合改性
渗氮
controlled nitriding
ion implantation
nitriding layer
tiN modificating layer
M2 high speed steel
computer simulation
