I&Q&P工艺对高硼铁基耐磨合金组织和性能的影响  

Effect of I&Q&P process on microstructure and properties of high-boron iron-based wear-resistant alloy

作　　者：王凯[1] 吴志方[1] 吴润[2] 李明伟 Wang Kai;Wu Zhifang;Wu Run;Li Mingwei(Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)

机构地区：[1]武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081

出　　处：《金属热处理》2020年第7期1-6,共6页Heat Treatment of Metals

基　　金：国家自然科学基金(51771139)。

摘　　要：借助光学显微镜(OM)、扫描电镜(SEM)、X射线衍射分析仪(XRD)和洛氏硬度计等,研究了I&Q&P工艺对高硼铁基耐磨合金组织和性能的影响。结果表明,高硼铁基合金的铸态组织由铁素体、马氏体、残留奥氏体和共晶硼化物组成,硼化物主要为Fe2B和Fe23(B,C)6。经I&Q&P工艺处理后,合金中残留奥氏体的体积分数从10.0%上升到16.8%,冲击吸收能量从3.76 J增加到6.80 J,硬度值从59.3 HRC下降至54.0 HRC,并生成了新的硼化物Fe3(B,C)。同时,合金的耐磨性也有了明显的提高。Effect of I&Q&P process on the microstructure and properties of high-boron iron-based wear-resistant alloys was studied by means of optical microscope(OM),scanning electron microscope(SEM),X-ray diffraction(XRD)and rockwell hardness tester.The results show that the as-cast microstructure of the high-boron iron-based alloys consists of ferrite,martensite,retained austenite and eutectic boride.The boride is mainly Fe2B and Fe23(B,C)6.After treated by I&Q&P process,the volume fraction of retained austenite in the alloys is increased from 10.0%to 16.8%,the impact absorbed energy of the alloy is increased from 3.76 J to 6.80 J,the hardness value is decreased from 59.3 HRC to 54.0 HRC,and a new boride Fe3(B,C)is generated.At the same time,the wear resistance of the alloy is significantly improved.

关 键 词：高硼铁基耐磨合金 铸态组织 I&Q&P工艺 残留奥氏体 耐磨性 

分 类 号：TG156.1[金属学及工艺—热处理]