摘要
将改性元素(如Cr、Mo、N等)的离子通过加速到极高速度,直接注入到轴承材料表面,使其达到改性的目的。本文就两种常用轴承材料(GCr15、Cr4Mo4V)注入不同元素(Cr、Mo、B、N)及其组合,进行了电化学测试、接触腐蚀试验和盐雾试验。在0.5M H_2SO_4溶液中的阳极极化行为表明:注入可以降低钝化电流密度3～4个数量级,维钝电流小1个数量级,钝化区明显扩大,这就说明其抗腐蚀能力会大大提高。从盐雾试验和接触腐蚀试验结果进一步证实这一结论:注入试样比非注入试样在抗蚀性方面提高很大。实验结果还表明:几种离子的组合比单一离子注入的效果好。本文对离子注入提高轴承材料耐蚀性的机理也进行了初步的探讨。
Modification of bearing materials, can be carried out by direct implanting the modified elements (such as Cr, Mo, N etc.) with high speed into the material surf ace. This paper describes the experiments of electrochemical test, contact corrosion test and salt spray test on two kinds of bearing materials GCrls and Cr4Mo4V which are implanted by different elements (Cr, Mo,B, N) and their combinations.The ano-dicpolarization behaviour of the test materials in 0.5M H2SO4 solution shows that the density of passivation current of implanted samples can be decreased by 3 ~ 4 orders of magnitnde and the passivation current decreased by one order of magnitude.The obvious enlargement of the passivation region shows that the capability of corrosion resistance of the materials may be greatly increased. The results of salt spray test and contact corrosion test further approved the same conclusion.The experimental results indicate that the implantation with mixed ions of several elements can achieve better performance of the materials than with single element.The mechanism of improvement of bearing materials corrosion resistance by ion implantation is also discussed primarily.
出处
《微细加工技术》
1991年第4期1-7,共7页
Microfabrication Technology
关键词
离子注入
CrMOV
GCR
耐蚀性
Ion implantation
Electrochemical test
Bearing meterial
Corrosion test.
