孙忠武,李富霖,刘瑞良,吴新宇

• 1:中国航发哈尔滨东安发动机有限公司
• 2:哈尔滨工程大学材料科学与化学工程学院超轻材料与表面技术教育部重点实验室

摘要(Abstract)：

在不同氮氢比下，对AISI 9310齿轮钢进行440℃渗氮处理12 h。利用X射线衍射仪、光学显微镜和扫描电镜等对渗氮层的组织结构进行表征，利用维氏硬度仪、球-盘式摩擦磨损试验机、电化学工作站等对渗氮层硬度、耐磨性和耐蚀性能进行测试和评价。结果表明：渗氮层主要由ε-Fe_(2-3)N、γ-Fe_4N以及含N的过饱和α-Fe相(α_N)组成；随着氮氢比的减小，ε-Fe_(2-3)N相逐渐减少；在不同氮氢比下渗氮试样的表面硬度均在1000 HV0.05左右，有效硬化层厚度均在100μm以上，其中氮氢比为1∶1和1∶3时，有效硬化厚度约为150μm,而氮氢比为1∶5时，有效硬化层厚度可达175μm;经过渗氮处理后，齿轮钢的耐磨性和耐蚀性均得到了显著提升，其中耐磨性最佳的渗氮试样的氮氢比为1∶3,其主要磨损机理是磨粒磨损，其次是氮氢比为1∶5时的渗氮试样，其主要磨损机理是磨粒磨损和黏着磨损；耐腐蚀性能最佳的渗氮试样为氮氢比为1∶1,其次为氮氢比为1∶5。表明可以采用渗氮替代常规渗碳对AISI 9310齿轮钢进行表面改性，并有效提升其综合性能。

关键词(KeyWords)： AISI 9310齿轮钢;等离子体渗氮;氮氢比;组织结构;性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52371060);; 黑龙江省自然科学基金(LH2023E060)

作者(Author): 孙忠武,李富霖,刘瑞良,吴新宇

DOI: 10.13289/j.issn.1009-6264.2024-0309

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