含不同易切削元素的笔头用易切削不锈钢微观组织的研究  

Research on the Microstructure of Free Cutting Stainless Steel Containing Different Free Cutting Elements for Ball Point Pen

作　　者：宋元元[1] 孔凡亚[1] 李红军[1] 戎利建[1] SONG Yuan-yuan;KONG Fan-ya;LI Hong-jun;RONG Li-jian(CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,Liaoning 110016,China)

机构地区：[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,辽宁沈阳110016

出　　处：《中国制笔》2020年第2期4-7,共4页China Writing Instruments

基　　金：国家重点研发计划“制笔新型环保材料”项目第一课题“新型环保笔头金属材料制造技术研发与产业化”(课题编号:2016YFB0302601)。

摘　　要：采用扫描电镜、电子探针等表征手段分析了含Bi(铋)和Te(碲)以及含Se(硒)的两种新型笔头用易切削铁素体不锈钢的显微组织,研究了易切削元素Bi、Te和Se在钢中的分布、形态及其对显微组织的影响,探讨了这些易切削合金元素代替有毒元素Pb的可能性。结果表明:在易切削铁素体不锈钢中加入Bi、Te或Se易切削元素后,Bi主要以单质形式呈块状分布在基体上或者附着在Mn S旁,而Te一般以MnTe或者Mn(S,Te)夹杂物形式存在;Se则主要形成了Mn(S,Se)夹杂物。形成的MnS型易切削相多以纺锤状或短棒状断断续续地呈链条样分布在铁素体基体上,易切削相的这种分布形态将有利于提高易切削性能。In order to study the effect of the distribution of the free cutting elements on the microstructures and evaluate their potential substitution for the harmful element Pb in the free cutting steels used for the ball point pen,the microstructures of two kinds of free-cutting ferritic stainless steels(with Bi/Te and Se,respectively)were investigated by means of scanning electron microscopy(SEM)and electron probe(EPMA).The results show that Bi is mainly distributed in its elemental form in the matrix or next to MnS,while Te generally exists as MnTe orMn(S,Te)inclusions;and Se is distributed in the form of Mn(S,Se)inclusions.On the other hand,MnS phases are distributed on the ferrite matrix in the spindle-like or short rod-like form,which is benefit for the cutting ability.

关 键 词：易切削钢 MNS Bi TE SE 

分 类 号：TG1[金属学及工艺—金属学]