吴梦泽,李烈军,彭继华

• 1:华南理工大学机械与汽车工程学院
• 2:华南理工大学材料科学与工程学院

摘要(Abstract)：

采用空心阴极离子源辅助,研究了低温(400℃)低压(2 Pa)下工作气体中氢气含量(氮氢比)对316L不锈钢离子渗氮层的组织形貌和性能影响。采用显微硬度计、球-盘滑动摩擦磨损仪、电化学工作站等仪器研究了渗氮处理对奥氏体不锈钢力学性能和电化学腐蚀性能的影响。结果表明:工作气体中随着氢气含量的增加,渗氮层深度、表面硬度等单调地降低;随着工作气体中氮气含量的增加,渗氮层组成相γN的晶格参数单调增加,晶粒膨胀程度增加,表面滑移带密度随之增加。通过离子源辅助,低温低压离子渗氮可有效地使316L不锈钢渗氮层表面硬度超过1100 HV,且在3.5%NaCl溶液中腐蚀电流密度比316L奥氏体不锈钢基体降低1倍。

关键词(KeyWords)： 离子渗氮;等离子体辅助;316L奥氏体不锈钢;耐磨性;耐腐蚀性

Abstract:

Keywords:

基金项目(Foundation): 广州市科技项目(201807010091);; 广东省科技项目(2015B090923006)

作者(Author): 吴梦泽,李烈军,彭继华

DOI: 10.13289/j.issn.1009-6264.2018-0186

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