摘要
采用金属蒸气真空弧离子源对1Cr18Ni9Ti不锈钢进行Co离子注入,考察了注入处理试样的摩擦磨损性能.结果表明:Co注入处理样品的表面硬度比未注入样品的高1.0～1.5倍,且硬度随离子束流密度的增大而增大;Co注入处理试样的摩擦系数显著降低至约0.20,磨损体积损失降低25%～45%;当束流密度为22μA/cm2、注入剂量为5×1017/cm2时,注入处理样品的摩擦系数为0.19,耐磨寿命最长;在所选定的试验参数范围以内,当临界束流密度处于22μA/cm2时,保留剂量最大,改性表面硬度最高,耐磨性能最佳.
1Cr18Ni9Ti stainless steel was ion implanted with Co using metal vapor vacuum arc ion source (Mevva), at an accelerating voltage of 40 kV, implantation doses of 3×1017/cm2 and 5×1017/cm2 and ion current densities of 13 μA/cm2, 22 μA/cm2 and 32 μA/cm2. The friction and wear behavior of the Co-ion implanted stainless steel in sliding against SAE52100 steel was investigated on a 2002-I vacuum friction and wear tester, in a ball-on-disc contact configuration. The worn surface morphologies of the unimplanted and various implanted stainless steel specimens were observed with a scanning electron microscope. The results showed that the Co-implanted stainless steel specimens had much higher hardness and better wear-resistance than the unimplanted one, while the hardness and the wear-resistance of the implanted specimens were dependent on the ion-implantation parameters. The friction coefficient decreased from 0.74 to 0.20 after Co implantation and the wear volume reduced by 25%-45% as compared to the unimplanted specimen. The Co-ion implantation of the stainless steel also led to differences in the worn surface morphologies of the stainless steel specimens, which accounted for their different friction and wear behaviors to some extent. The stainless steel specimen implanted at a current density of 22 μA/cm2 and an implantation dose of 5×1017/cm2 showed the best friction-reducing and antiwear ability.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2003年第6期480-484,共5页
Tribology
关键词
不锈钢
金属蒸气真空弧(Mevva)
钴
离子注入
摩擦磨损性能
Cobalt
Friction
Hardness
Morphology
Positive ions
Scanning electron microscopy
Stainless steel
Wear of materials
Wear resistance
