C、Co及C+Co双注入对高速钢机械性能影响的研究

A study of wear resistance for C, Co and C+Co implanted HSS

采用ＭＥＶＶＡ源离子注入机对高速工具钢（ＨＳＳ）进行了Ｃ、 Ｃｏ及Ｃ＋Ｃｏ双注入，并做了 硬度、摩擦系数测量和磨损实验。Ｃ离子注入剂量３×１０１７ｃｍ－２，能量６０ｋｅＶ；Ｃｏ离子注入剂量 为２×１０１７、 ４×１０１７、６×１０１７ｃｍ－２，能量１０２ｋｅＶ。结果表明，不同元素、不同剂量的离子注入 均能有效地改善ＨＳＳ的硬度和摩擦磨损特性，从而极大延长ＨＳＳ的工作寿命，且随着注入剂量 的增加，改善的效果有所增强。另外，Ｃｏ离子注入有较好的润滑作用，能提高ＨＳＳ表面的韧 性和弹性，使其具有良好的自修复能力。

The HSS samples were implanted with 3×10`17cm-2 of 60keV C ions and (2-6) 10`17cm-2 of 102keV Co ions respectively, from a MEVVA ion source.The average beam flux was about 26.5 A. cm-2 The surface friction coefficient and hardness were measured, and wearing test was made. It was shown that the surface hardness of C, Co or C+Co implanted HSS increased from 15% to 50%, and the C+Co dual implanted surface of HSS was the hardest.The surface friction coefficient of HSS implanted with Co or C+Co ions decreased from 0.42 to 0.14. The wear resistance of the surface modified by C+Co dual implantation was better than that modified by C or Co single implantation. The surface of HSS implanted with Co ions had better lubricity, elasticity and tenacity. The C+Co dual implantation was one of the best methods to improve the surface wear resistance of HSS.