论文部分内容阅读
利用半导体激光器在45~#钢表面制备Fe-36Ni因瓦合金熔覆层,采用光学显微镜(OM)、X射线衍射(XRD)及能谱(EDS)对熔覆层的显微微组织进行分析。利用显微硬度计和磨损试验机以及多功能材料表面性能测试仪测试熔覆层的显微硬度和摩擦磨损性能。结果表明,Fe-36Ni因瓦合金熔覆涂层表面光滑平整,熔覆涂层物相为Fe_(0.64)Ni_(0.36)和γ-(Fe.Ni)相,保证了因瓦效应的产生。随着激光功率的增加,熔覆层组织先细小后变得粗大;随着激光功率的增加,熔覆层的显微硬度和耐磨性表现为先升高后降低,当激光功率为1 400 W时,熔覆层硬度达到最大值395.1HV0.2,为基体的1.6倍;熔覆层耐磨失重为0.006 7g,为基体的2.2倍。
The cladding layer of Fe-36Ni Invar alloy was prepared on 45 ~ # steel by using semiconductor laser. The microstructure of the cladding layer was analyzed by optical microscope (OM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) The microhardness and friction and wear properties of the cladding were tested with a microhardness tester and a wear tester as well as a multi-functional surface property tester. The results show that the surface of the Fe-36Ni Invar alloy coating is smooth and the Fe_ (0.64) Ni_ (0.36) and γ- (Fe.Ni) phases are the cladding phases, which ensure the Invar effect. With the increase of the laser power, the microstructure of the cladding becomes fine first and then becomes coarse. With the increase of the laser power, the microhardness and wear resistance of the cladding increase at first and then decrease. When the laser power is 1 400 W, the hardness of the cladding reaches the maximum of 395.1HV0.2, which is 1.6 times of the matrix. The wear resistance of the cladding is 0.006 7g, which is 2.2 times of the matrix.