强流脉冲离子束辐照改善W9Cr4V轴承钢的表面性能  

Surface Modification of W9Cr4V Air-bearing Steel Through High Intense Pulsed Ion Beams Irradiation

作　　者：薛彦庆[1] 汪诚[1] 王学德[1] 赖志林[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《中国表面工程》2012年第3期76-80,共5页China Surface Engineering

基　　金：装备预先研究项目(代号略)

摘　　要：为改善W9Cr4V轴承钢表面性能,提高轴承使用寿命,研究强流脉冲离子束(HIPIB主要由C+(70%)、H+(30%组成))技术辐照处理效果。用1、10、20、30不同脉冲次数分别对W9Cr4V试片进行处理。采用倒置金相显微镜、X射线衍射仪、显微硬度仪、pin-on-disc(POD)方法、电化学工作站分别测量辐照前后试样的表面形貌和性能。结果表明,HIPIB辐照处理使W9Cr4V轴承钢试片近表层晶粒细化,产生了奥氏体相和碳化物,并且马氏体择优面发生改变,衍射峰向高角方向偏移并宽化。同时,由于HIPIB辐照处理快速升降温和冲击波的影响,处理后试片表面显微硬度最高提高了19.63%,表面耐磨性提高近2倍,耐腐蚀性显著改善。To improve surface properties of W9Cr4V and increase the bearing life,W9Cr4V sample was treated by high intensity pulsed ion beam（HIPIB）,which consists mainly of C＋（70%） and H＋（30%）.The processing was conducted with the parameters of 150 A/cm2 high beam current density,250 kV acceleration voltage,80 ns pulse duration,and the irradiation times were 1,10,20 and 30,respectively.The changes of performance and morphology can be found on the surface after the process.The sample was analyzed with MAT,XRD,pin-on-disc（POD） methods,and mecrohardness tester.The results show that the grains are refined on the near-surface,resulting in the austensite phase,carbides and martensite,which proves that the surface changes,the direction of the diffraction peaks shifts to the higher angle and broadens.At the same time,influenced by the sharp increasing temperature and shock wave from HIPIB irradiation,the microhardness increases by 19.63%,which is the highest,the wear resistance of surface layer increases nearly two times,and a remarkable improvement of corrosion resistance can be found on the surface.

关 键 词：强流脉冲 表面改性 硬度 耐磨性 

分 类 号：TG178[金属学及工艺—金属表面处理] TG142.45[金属学及工艺—金属学]