钢表面激光处理碳纳米管涂层组织与耐磨性研究  

Structure and wear resistant behavior of laser strengthening carbon nanotubes coating on steel surface

作　　者：张华堂[1] 魏秉庆[1] 张继红[1] 梁吉[1] 吴德海[1] 

机构地区：[1]清华大学摩擦学国家重点实验室,清华大学机械工程系

出　　处：《清华大学学报（自然科学版）》1998年第10期20-22,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金

摘　　要：为研究碳纳米管的耐磨性能，将其涂覆于４５钢表面，在氩气保护下采用３ｋＷＣＯ２连续激光器进行处理，然后进行淬火和低温回火，测定处理前后试样的组织结构和硬度，并采用ＭＨＫ－５００环块磨损试验机进行磨损性能测试。试验结果表明：经激光处理后，部分碳纳米管得到保留，部分碳纳米管在４５钢表面与Ｆｅ生成Ｆｅ３Ｃ，并且产生一层含２．５％～３．５％Ｃ的亚共晶合金化层，经进一步淬火后表面硬度可达ＨＲＣ７０，耐磨性也大大改善，分别比４５钢合金化、４５Ｃｒ熔凝和４０Ｃｒ合金化提高４０％、１８％和３１％。In order to study the wear resistant behavior of the carbon nanotubes, a thin buckytubes layer was coated on the surface of steel 45, then treated with the 3kW CO 2 continuous laser machine under the argon protection. Subsequent heat treatments were also employed to modify the surface buckytubes coating. The structure and hardness of specimen before and after the treatments were tested. The MHK 500 ring and block wear test machine was used to analyze their wear resistance. The results show that some buckytubes are remained, some of them form Fe 3C with Fe and a hypereutectic layer of alloys with 2.5%￣ 3.5% C is also obtained. After the subsequent quenching, the hardness of HRC70 can be reached on the surface. The laser processing and the heat treatment together can highly improve the wear resistance.

关 键 词：碳纳米管 激光处理 耐磨性 钢 涂层 组织 

分 类 号：TG174.445[金属学及工艺—金属表面处理] TH117.1[金属学及工艺—金属学]