摘要
以Fe-Si二元合金为基体进行表面渗碳处理,研究了Si含量对渗碳层组织、硬度及耐磨性的影响。结果显示基体中的Si原子在渗碳过程中氧化形成SiO2沿奥氏体晶界分布,随Si含量增加,SiO2含量增加并呈连续网状分布。渗碳处理后Fe-Si合金表面硬度在64HRC以上,硅原子对渗碳过程产生阻碍作用,渗碳有效硬化层深度随Si含量增加显著降低。干摩擦条件下Fe-Si合金渗碳层抗平面滑动摩擦磨损性能随Si含量增加逐渐提高,Fe-3%Si合金耐磨性高于高铬铸铁。
Binary Fe-Si alloys with different Si-contents were carburizing treated. The effect of Si-contents on the microstructure, hardness and the wear resistance of the carburized layer were studied. The results show the constituents of SiO2 form along the inter- face of the austenite phase during the carburizing treatment. The fraction of SiO2 increases with the adding of the Si-contents in the matrix and it gradually trends to distribute into the continuous network. After carburizing treatment, the surface hardness of Fe-Si al- loys is beyond 64HRC. The hardening layer depth decreases with the Si-contents adding due to the hindering effect of the Si atoms to the carburization. The wear resistance in the dry sliding condition of Fe-Si alloys improves as the Si-contents increase, the wear resis- tance of Fe-3% Si alloy is better than the high chromium cast iron.
出处
《北华航天工业学院学报》
CAS
2013年第2期10-13,共4页
Journal of North China Institute of Aerospace Engineering
基金
北华航天工业学院科研基金项目(KY-2010-14)
