宋元元,吴宪吉,孔凡亚,戎利建

• 1:中国科学院金属研究所中国科学院核用材料与安全评价重点实验室

摘要(Abstract)：

采用扫描电镜、电子探针和拉伸实验等研究了国产含Bi笔头用易切削铁素体不锈钢的显微组织及性能,并与含Pb笔头用易切削铁素体不锈钢的显微组织及性能进行了对比分析,探讨以Bi代替有害元素Pb的可能性。结果表明:两种笔头用易切削铁素体不锈钢的基体铁素体晶粒均非常细小,易切削相主要是MnS和Bi或者Pb单质。其中MnS易切削相的分布状态十分相似,多以纺锤状或者短棒状断断续续地呈链条状分布在铁素体基体上;而Bi或者Pb单质则非常细小弥散地分布在基体中。该显微组织结构对切削性能十分有利。拉伸实验结果显示含Bi笔头用易切削铁素体不锈钢的力学性能与含Pb笔头用材料的性能相当。上述组织与性能结果表明Bi有望替代有害元素Pb。

关键词(KeyWords)： 易切削钢;Bi;显微组织;MnS

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2016YFB0302601)

作者(Author): 宋元元,吴宪吉,孔凡亚,戎利建

DOI: 10.13289/j.issn.1009-6264.2019-0513

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