慕东,江鸿,邵甄胰

• 1:成都工业学院材料工程学院
• 2:四川省模具技术高校重点实验室
• 3:上海理工大学材料科学与工程学院

摘要(Abstract)：

对Q235钢电镀镍层进行渗硼处理,研究其渗层组织特性及抗高温氧化性能。用扫描电子显微镜(SEM)对镀镍渗硼层横断面进行了显微组织观察,用X射线能谱仪(EDS)分析了渗层不同部位的元素分布。结果表明,渗硼层为Fe2B,Ni4B3和Ni31Si12相,渗层厚度为33~254μm,并随着渗硼温度和渗硼时间的增加而增加。用显微硬度计测试渗层的硬度分布,复合层(硼化物和硅化物层)的硬度值约为1753 HV,硼化物层的硬度值为1645~2003 HV,基体硬度为173 HV。镀镍层与镀镍渗硼层经700℃氧化40 h的高温氧化动力学曲线显示镀镍渗硼层的抗高温氧化性能优于镀镍层,Ni3Si,B2O3和Si O2产物起到提高其抗高温氧化性能的作用。

关键词(KeyWords)： Q235钢;电镀镍;渗硼;硬度;抗高温氧化性

Abstract:

Keywords:

基金项目(Foundation): 四川省教育厅自然科学基金(13ZB0049);; 上海市自然科学基金(A 13 ZR 1427900)

作者(Author): 慕东,江鸿,邵甄胰

DOI: 10.13289/j.issn.1009-6264.2016.05.034

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