摘要
利用等离子体浸没离子注入与沉积(PIII＆D)技术在AISI52100轴承钢基体表面合成了Ti-C薄膜.测试了合成薄膜后试样表面的化学组成、摩擦磨损性能、纳米硬度、弹性模量和滚动接触疲劳寿命,观察了疲劳破坏后试样断面的光学形貌．XRD结果表明处理后试样表面形成了TiC相．光学显微镜下疲劳裂纹的萌生和扩展形貌揭示出疲劳破坏可能存在表面点蚀和膜层剥离两种形式．在Hertz接触应力为5．1 GPa,90％置信区间条件下的疲劳寿命延长了5．5倍;最大微观硬度和弹性模量分别增加了28．4％和12．1％;相同磨损条件下的摩擦系数从0．95下降到0．15．
Ti-C film is synthesized by plasma immersion ion implantation and deposition （PIII＆D） technique on AISI52100 bearing steel surface. XRD patterns show that the film consists of TiC phase. Rolling contact fatigue （RCF） failure appeared at the parts of pit corrosion and delamination of the film layers, or a combination of these two modes , which are dependent on the substrate bias voltage, implanted pulse width, treatment time and surface roughness. The maximum RCF life of the treated sample is prolonged by 5.5 times at a Hertz stress level of 5.1 GPa and 90% confidence level. Compared with the substrate, the maximum microhardness and elastic modulus measured by nanoindentation method for the treated specimen are increased by 28.4% and 12.1%, respectively, and the friction coefficient decreased from 0.95 to 0.15.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第11期1197-1201,共5页
Acta Metallurgica Sinica
基金
哈尔滨市科技攻关资助项目2005aqcs200~~
关键词
轴承钢
离子注入
TiC薄膜
疲劳寿命
摩擦磨损性能
bearing steel, ion implantation, TiC film, fatigue life, friction and wear property
