【作者】 曹辉； 郝仪； 张文凤； 高波； 涂赣峰； 郝胜智； 董闯；

【Author】 H.Cao~1,Y.Hao~1,W.F.Zhang~1,B.Gao~(1,*),G.F.Tu~1,S.Z.Hao~2,C.Dong~2 1 School of materials and metallurgy,Northeastern University,Shenyang,China,110004 2 Key Laboratory of the Ministry of Education of Materials Modification by Laser,Ion and Electron Beams Dalian University of Technology,Dalian,China,116024

【机构】 东北大学材料与冶金学院； 三束材料改性教育部重点实验室；

【摘要】 本文利用强流脉冲电子束对变形镁合金AZ31进行表面处理。利用光学显微镜、扫描电镜和X射线衍射对表面处理层形貌和组织结构进行了分析,并进行了显微硬度和摩擦磨损性能测试。结果表明,处理样品表面完全重熔,残存了数百兆帕压应力,而且随脉冲次数增加,改性层加深,距表面几百微米范围内都存在显微硬度增加现象,15次脉冲处理后样品相对抗磨性提高5.6倍。更多还原

【Abstract】 High current pulsed electron beam(HCPEB) irradiation of wrought magnesium alloy AZ31 was studied with the aim of enhancing its sliding friction and wear resistance.Microstructure of surface modification layer was analyzed by optical microscope(OM),scanning electron microscope(SEM)and X-ray diffraction(XRD).Mechanical properties like microhardness and wear resistance were investigated in detail.The results show that the surface of HCPEB-treated sample completely remeltes and exists a plenty of stress in the range of several hundred Mpa.At the same time,it is founded,with the increase of pulse number,the thickness of modified layer mcreases and the microhardness wholly enhances within a few hundred micros from sample surface.The sample’s relative wear resistance is improved by a factor of 5.6 after HCPEB treatment for 15 pulses compared with untreated sample.更多还原