CeO_(2)添加量对铁基粉末冶金材料表面渗硼层组织与摩擦磨损性能的影响  

Effect of CeO_(2) Addition on Microstructure and Friction and Wear Properties of Boronizing Layer on Surface of Iron-Based Powder Metallurgy Materials

作　　者：于庆萍 张光胜[1,2] 夏莲森[3] 方慧敏 YU Qingping;ZHANG Guangsheng;XIA Liansen;FANG Huimin(School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China;School of Mechanical Engineering,Anhui Technical College of Mechanical and Electrical Engineering,Wuhu 241002,China;School of Aerospace,Harbin Institute of Technology,Harbin 150006,China)

机构地区：[1]安徽工程大学材料科学与工程学院,芜湖241000 [2]安徽机电职业技术学院机械工程学院,芜湖241002 [3]哈尔滨工业大学航天学院,哈尔滨150006

出　　处：《机械工程材料》2023年第4期18-22,32,共6页Materials For Mechanical Engineering

基　　金：2020年安徽省教育厅质量工程重点项目(2020dsgzs14);安徽省高校自然科学研究重点项目(KJ2021A1522,KJ2020A1100)。

摘　　要：在渗硼剂中添加CeO_(2),采用固体粉末渗硼法对Fe-2%Cu-0.4%C铁基粉末冶金材料进行950℃×5 h渗硼处理,研究了CeO_(2)添加量(0,2%,4%,质量分数)对渗硼层显微组织和摩擦磨损性能的影响。结果表明:不同CeO_(2)添加量下的渗硼层均形成单一Fe_(2)B相;随着CeO_(2)添加量的增加,渗硼层的表面粗糙度增大,厚度、硬度及耐磨性能呈先增大后减小趋势;当CeO_(2)添加质量分数为2%时,渗硼层的厚度和硬度均最大,分别约为144μm和58.0 HRC,此时渗硼层的表面完整性相对较好,磨损量最小,约为0.008 g,耐磨性能最佳。Fe-2%Cu-0.4%C iron-based powder metallurgy material was boronized at 950℃ for 5 h by solid powder boronizing method with a boronizing agent containing CeO_(2).The effects of CeO_(2) addition(0,2%,4%,mass fraction)on the microstructure and friction and wear properties of the boronizing layer were studied.The results show that the boronizing layer with different addition amounts of CeO_(2) had a single Fe_(2)B phase.With the increase of CeO_(2) addition,the surface roughness of the boronizing layer increased,and the thickness,hardness and wear resistance increased first and then decreased.When the mass fraction of CeO_(2) was 2%,the thickness and hardness of the boronizing layer were the largest,about 144μm and 58.0 HRC,respectively.At this time,the surface integrity of the boronizing layer was relatively good,the amount of wear was the smallest,about 0.008 g,and the wear resistance was the best.

关 键 词：CeO_(2) 铁基粉末冶金材料 渗硼 摩擦磨损 

分 类 号：TG174.445[金属学及工艺—金属表面处理]