M2高速钢强脉冲离子束表面改性及其耐磨耐蚀性  

Surface modification of M2 high-speed steel by high intense pulsed ion beam

作　　者：李玉海[1] 邢贵和[1] 李生志[1] 娄长胜[1] 袁进伟[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110168

出　　处：《沈阳工业大学学报》2010年第2期141-145,共5页Journal of Shenyang University of Technology

基　　金：科技部国际合作重点项目(2004DFA04800)

摘　　要：为了改善M2高速钢的表面强度和耐磨耐蚀性能,利用强流脉冲离子束(HIPIB)对M2高速钢进行了表面改性处理.通过x-射线衍射(XRD)、扫描电子显微镜(SEM)、超微载荷显微硬度计、盐雾腐蚀和摩擦磨损试验机对HIPIB辐照前后M2高速钢的表面相结构和形貌、显微硬度、耐蚀性和摩擦磨损性能进行检测,结果表明:HIPIB辐照处理使M2高速钢表面层晶间残余奥氏体量增加,在材料表面产生了许多火山口状熔坑.随着脉冲次数的增加,材料表面产生微区光化现象.经辐照处理后的试样表面,显微硬度得到明显提高,在脉冲次数达到15次时,表面层的耐磨性能提高了2倍,耐蚀性得到明显改善.当脉冲次数为10～15次时,材料的综合耐磨耐蚀性较好.In order to improve the surface hardness as well as wear and corrosion resistances of M2 high-speed steel,the surface modification treatment was performed with high intense pulsed ion beam（HIPIB） .The phase structure and morphology,micro-hardness,corrosion resistance as well as friction and wear properties of M2 high-speed steel before and after HIPIB irradiation were detected with x-ray diffraction（XRD） ,scanning electron microscopy（SEM） ,ultra low load micro hardness tester,salt spray tester as well as fiction and wear testing machine.The experimental results show that HIPIB irradiation can increase the amount of intergranular residual austenite in the surface layer of M2 high-speed steel,and a lot of surface craters develop.With increasing the number of pulse,the steel surface becomes smooth.After the irradiation,the micro-hardness of the steel surface gets significantly enhanced.When the number of pulse is 15,the wear resistance increases by 2 times and the corrosion resistance gets considerably improved.When the number of pulse is 10 to 15,the excellent wear and corrosion resistances can be achieved.

关 键 词：强流脉冲离子束 高速钢 表面改性 显微硬度 耐磨性 耐蚀性 摩擦磨损 辐照 

分 类 号：TG402[金属学及工艺—焊接]