HT250刹车盘气体渗氮耐磨性研究  

Wear Resistance of the HT250 Brake Disk Treated by Gas Nitriding

作　　者：程相征 谢鲲[1] 赫庆坤[1] 高翔 陈洋洋 曹勇军 陈蕴博[1] 孙金全[1] CHENG Xlangzheng;XIE Kun;HE Qlngkun;GAO Xiang;CHEN Yangyang;CAO Yongjun;CHEN Yunbo;SUN Jinquan(School of Materials Science and Engineering, Shan Dong University of Science and Technology, Shandong Qingdao 266590, China;Qingdao Gaoce Technology Co Ltd, Shandong Qingdao 266111, China;Porite Yangzhou technology ＆ industrial Co Ltd, Jiangsu Yangzhou 225000, China;Foxeonn Technology Group, Shandong Yantai 264000, China;Himile Group Co Ltd, Shandong Weifang 261000, China)

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590 [2]青岛高测科技股份有限公司,山东青岛266111 [3]扬州保来得科技实业有限公司,江苏扬州225000 [4]富士康科技集团,山东烟台264000 [5]豪迈集团,山东潍坊261000

出　　处：《摩擦学学报》2018年第3期256-263,共8页Tribology

摘　　要：为提高HT250刹车盘耐磨、耐腐蚀性,延长服役寿命,对其进行了气体渗氮表面强化处理.分别对基体和氮化试样进行了微观组织和物相分析,研究了销盘干摩擦的摩擦磨损行为,探讨了HT250渗氮试样的磨损机理.结果表明:采用530℃×10 h气体渗氮时,渗氮层深为0.3 mm,其表层硬度HV_(0.1) 1 140;在20、50和100 N载荷下,渗氮试样摩擦系数均高于基体试样,但磨损率分别降低了11.1%、27.5%和38.3%.基体试样以疲劳剥层磨损为主,伴随着磨粒磨损;渗氮试样以剥层磨损为主,渗氮层的残余压应力抑制了裂纹的扩展,提高了其耐磨性.HT250 the brake disk was treated by gas nitriding for improved wear resistance, corrosion resistance and prolong service lifetime. The microstructure and phase of the nitrided and unnitrided samples were analyzed and the wear mechanisms were discussed under dry sliding with a pin-on-plate configuration. The results indicate that the thickness of the nitriding layer treated by gas nitriding at the 530 ℃×10 h was 0.3 mm and the surface hardness was HV0.1 1 140. The friction coefficient of the nitrided sample was higher than that of unnitrided sample under loads of 20,50 and 100 N. However, the wear rates were reduced by 11.1%（20 N）, 27.5%（50 N） and 38.3%（100 N） using unnitrided sample as reference. The wear mechanisms of the unnitrided sample was fatigue peeling wear accompanied by abrasive wear. The wear mechanism of the nitrided sample was peeling wear. The compressive residual stress of nitriding layer inhibited the crack propagation and improved the wear resistance.

关 键 词：HT250 气体渗氮 剥层磨损 摩擦磨损 

分 类 号：TG156.8[金属学及工艺—热处理]