王晓娟,谢飞,程健,潘建伟

• 1:常州大学材料科学与工程学院
• 2:常州大学江苏省材料表面技术重点实验室
• 3:常州大学怀德学院

摘要(Abstract)：

在粉末渗剂和45钢试样上施加4 A电流的直流电场,于800℃进行直流电场增强渗硼。以X射线衍射、光学显微观察和显微硬度测试等手段,分析位于电场不同位置试样渗硼层的相结构、显微组织、厚度与及显微硬度分布。结果表明:电场渗硼的渗层组织形态基本与常规渗硼的一致,以锯齿状楔入基体,但其相结构、显微硬度分布、厚度等与试样位置有关;朝正极面的渗层一般由Fe B和Fe2B两相组成,渗层较厚且较硬;朝负极面的渗层主要由Fe2B组成,随渗硼时间延长Fe B先增加,后减少至消失;渗硼时间等于及超过2 h,渗层下出现明显的过渡区;渗层厚度与保温时间关系曲线呈抛物线特征。从直流电场对渗剂化学反应、含硼活性基团在气氛中的扩散及硼在试样内扩散的影响等方面进行了分析。

关键词(KeyWords)： 粉末法渗硼;直流电场;相结构;显微硬度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171032)

作者(Author): 王晓娟,谢飞,程健,潘建伟

DOI: 10.13289/j.issn.1009-6264.2015.02.035

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