李艳霞,刘芳,刘杰,张巨成,刘俊友

• 1:北华航天工业学院材料系
• 2:北京科技大学材料科学与工程学院
• 3:北科德瑞冶金工程技术有限公司

摘要(Abstract)：

设计了一种新型的铁基二元合金—Fe-3%Si合金,并对其进行表面渗碳处理。借助于SEM、XRD、EPMA、硬度测定及摩擦实验等分析手段,研究了合金渗碳层的组织及其性能。结果表明:Fe-3%Si合金渗碳层组织中形成大量SiO2颗粒,基体主要由马氏体和残余奥氏体组成。渗碳初期,Si元素促进了碳在奥氏体中扩散并有利于奥氏体稳定性提高。但氧原子沿奥氏体晶界扩散并与晶界及其附近的Si结合形成网状SiO2,阻碍碳原子进一步扩散.渗碳处理后的Fe-3%Si表面硬度达到66 HRC,干摩擦条件下抗平面滑动摩擦磨损性能优于高铬铸铁。

关键词(KeyWords)： 铁硅合金;渗碳;SiO2颗粒;摩擦;磨损

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李艳霞,刘芳,刘杰,张巨成,刘俊友

DOI: 10.13289/j.issn.1009-6264.2013.04.033

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