低碳马氏体不锈钢显微组织和碳化物演变对刀具使用性能的影响  

Influence of microstructure and carbide evolution of low-carbon martensitic stainless steel on tool performance

作　　者：李国庆 卢广义 提唱 林思围 刘文乐 王学林 尚成嘉 关文杰 郭福建 Li Guoqing;Lu Guangyi;Ti Chang;Lin Siwei;Liu Wenle;Wang Xuelin;Shang Chengjia;Guan Wenjie;Guo Fujian(Yangjiang Branch,Guangdong Laboratory for Materials Science and Technology(Yangjiang Advanced Alloys Laboratory),Yangjiang 529500,Guangdong,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China;Binovo Manufacturing Co.,Ltd.,Yangjiang 529500,Guangdong,China;School of Material Science and Engineering,Guangdong Ocean University,Yangjiang 529500,Guangdong,China)

机构地区：[1]阳江合金材料试验室,广东阳江529500 [2]北京科技大学,新金属材料国家重点实验室,北京100083 [3]广东百创源科技股份有限公司,广东阳江529500 [4]广东海洋大学材料科学与工程学院,广东阳江529500

出　　处：《钢铁钒钛》2023年第6期167-171,共5页Iron Steel Vanadium Titanium

基　　金：阳江市科技项目(阳江市企业科技特派员项目RCZX2021015);广东省重点研发项目(高端刀剪用钢铁材料集成计算工程及其在新材料新技术研发中的应用2021 B0707050002)。

摘　　要：为研究碳化物的分布、种类与刀具锋利度之间的关系,分别对30Cr13材料刀具的淬火态和回火态进行了锋利度测试和显微组织表征。结果分析表明,经过300℃、30 min回火处理后的刀具,其初始锋利度下降了34.6%,累计切割厚度下降了26.4%。但回火态的刀具单次切割下损失的锋利度值更小,有更好的耐用性。其原因是回火后M23C6型碳化物大量析出,通过弥散强化增强了耐磨性,而淬火马氏体中的碳减少,硬度下降,刀具锋利度降低。In the current study,the sharpness test and microstructure characterization for the 30Cr13cutter under the regime of quenching and tempering processes was performed to investigate the relationship between distribution and type of carbides and sharpness of cutting tools.After the tempering process(300℃,30 min),the initial sharpness and cumulative thickness cuts of the cutter decrease by34.6%and 26.4%,respectively.However,the tool under the state of tempering have a less loss of sharpness in single cutting and a better durability,and the following reasons should be considered for these results:(i)the increase of the M23C6 carbide precipitates after tempering enhances wear resistance of tools through dispersion strengthening and(ii)the reduction of carbon in the quenched martensite leads to lower hardness and sharpness of the cutter.

关 键 词：低碳马氏体不锈钢 30Cr13 刀具锋利度 碳化物 热处理 耐磨性 

分 类 号：TF76[冶金工程—钢铁冶金] TG711[金属学及工艺—刀具与模具]