钟芳兴,陈雄清,周贤良,华小珍,许武波

• 1:南昌航空大学材料科学与工程学院
• 2:江西新余雄达机械公司

摘要(Abstract)：

采用液相等离子电解渗氮技术,研究了不同甲酰胺浓度对38CrMoAl钢渗氮层组织及性能的影响。利用OM、SEM、XRD观察分析渗氮层的微观组织结构和物相构成,RF-GDOES和Parstat2273电化学工作站分别表征渗氮层的元素分布和耐蚀性,并测试分析了渗层截面的显微硬度。结果表明,随着电解液中甲酰胺浓度的升高,渗氮致密层、白亮层、扩散层厚度呈先增加后降低的趋势,渗氮层最大显微硬度值呈增加的趋势;当甲酰胺浓度升高至70%时渗氮层达到最大,为125μm,白亮层为51μm;渗氮后扩散层硬度值较高,而心部组织硬度较未处理试样提升约2倍;渗氮层表层主要含Fe2N和Fe3N相,扩散层以Fe16N2、FeN相为主,过渡层主要为α-Fe、FeN0.097相;渗氮层的耐蚀性优于未经处理试样。

关键词(KeyWords)： 液相等离子电解渗氮;甲酰胺浓度;组织结构;腐蚀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51262023)

作者(Author): 钟芳兴,陈雄清,周贤良,华小珍,许武波

DOI: 10.13289/j.issn.1009-6264.2015.07.033

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