离子轰击热处理技术对轴承钢摩擦学性能的影响  

Tribological Properties of 52100 Steel Treated by Different Plasma Bombardment Heat Treatment Method

作　　者：刘沅东[1] 王成彪[1] 车延岗[1,2] 袁静静[3] 刘家浚[4] 

机构地区：[1]中国地质大学工程技术学院,北京100083 [2]中国地质科学院勘探技术研究所,廊坊065000 [3]中国矿业大学(北京)材料系,北京100083 [4]清华大学机械工程系,北京100084

出　　处：《机械工程学报》2011年第5期126-133,共8页Journal of Mechanical Engineering

摘　　要：为提高轴承钢的摩擦磨损性能,采用离子轰击热处理技术在GCr15轴承钢的表面生成渗硫层、渗氮层和硫氮复合渗层。在球—盘摩擦磨损试验机上对比研究轴承钢原始表面、渗硫表面,渗氮表面与硫氮复合处理表面在油润滑下的摩擦磨损性能。利用显微硬度计分析不同表面的硬度;利用扫描电镜观察不同处理表面和磨损表面的形貌;利用X射线光电子能谱仪分析磨损表面边界润滑膜化合物的价态并研究元素随深度的变化。研究表明,GCr15轴承钢表面通过渗硫、渗氮、硫氮复合处理后在油润滑条件下摩擦磨损性能都可以得到比较明显的提高。轴承钢基体对渗硫层的支持作用有限,影响硫化层作用的发挥。高硬度的渗氮层在较低载荷下可以起到很好的减摩抗磨作用。硫氮复合处理盘由于在较软的共渗层下面存在高硬度的渗氮层,可以对表面的软质层提供更强的支持,在较苛刻的工况下,硫氮复合盘的摩擦学性能显得更加突出。Sulfurized layer,nitrided layer and nitrided with sulfurized layer are prepared on the 52100 steel surface by different plasma bombardment heat treatment technology in order to improve its tribological properties.A ball-on-disk sliding friction and wear tester is used to investigate the friction and wear properties of the original,sulfurized,nitrided and nitrided with sulfurized surface systemically.Micro-hardness tester is used to measure the hardness of different treated surfaces.Scanning electric microscope（SEM） is employed to analyze the morphologies of the worn surface.X-ray photoelectron spectroscope（XPS） is adopted to identify the valence state of boundary lubrication film and to detect the elements variation along with depth.The results show that plasma heat treatment can improve the tribological properties of 52100 steel under oil lubricated conditions.The 52100 steel substrate can＇t provide enough support to the sulfurized layer,so the lubrication effect of sulfurized layer is limited.The nitrided layer with high hardness has better friction and wear properties under lower load.The nitrided with sulfurized layer exhibits best tribological properties under harsh condition because the nitrided substrate can provide better supporting effect to sulfide layer.

关 键 词：离子渗硫 离子渗氮 硫氮复合处理 摩擦磨损 

分 类 号：TG156.8[金属学及工艺—热处理]