激光功率对激光熔覆Fe-36Ni因瓦合金涂层组织与耐磨性的影响

张坚; 王震; 赵龙志; 刘德佳; 赵明娟

doi:doi:10.14128/j.cnki.al.20173701.027

应用激光, 2017, 37 (1): 27, 网络出版: 2017-06-27

激光功率对激光熔覆Fe-36Ni因瓦合金涂层组织与耐磨性的影响

Effect of Laser Power on Microstructure and Wear Resisture of Laser Cladding Fe-36Ni Invar Alloy Coating

论文大纲

张坚 ^*王震赵龙志刘德佳赵明娟

作者单位

华东交通大学载运工具与装备教育部重点实验室, 江西南昌 330013

激光熔覆因瓦合金激光功率摩擦磨损 laser cladding Invar alloy coating laser power tribology

摘要

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Fe0.64Ni0.36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395.1 HV0.2, 为基体的1.6倍; 熔覆层耐磨失重为0.006 7 g, 为基体的2.2倍。

Abstract

Fe-36Ni Invar alloy cladding layer were fabricated on a 45 steel substrate by the use of a diode laser. The microstructure of the coating was analyzed with optical microscope, x-ray diffraction (XRD) and energy disperse spectroscopy (EDS).The microhardness and frictional wear were examined by hardness tester, tribology machines and multi-functional tester for material surface. The results show thatFe-36NiInvar alloy cladding coating is smooth, uniform and dense. The main phases in cladding zone are Fe0.64Ni0.36 and γ-(Fe.Ni), so the cladding layer has Invar effect. With the increase of laser power, the microstructure of cladding layer is changed from small to large. Microhardness and wear resistance were increased first and then decreased. When the laser power is 1 400 W, the cladding coating is smooth, uniform and dense. The microhardness reached maximum is 395.1 HV0.2, which is 1.6 times of that of the substrate. The wear loss minimum is 0.006 7 g, which is 2.2 times of that of the substrate.

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张坚, 王震, 赵龙志, 刘德佳, 赵明娟. 激光功率对激光熔覆Fe-36Ni因瓦合金涂层组织与耐磨性的影响[J]. 应用激光, 2017, 37(1): 27. Zhang Jian, Wang Zhen, Zhao Longzhi, Liu Dejia, Zhao Mingjuan. Effect of Laser Power on Microstructure and Wear Resisture of Laser Cladding Fe-36Ni Invar Alloy Coating[J]. APPLIED LASER, 2017, 37(1): 27.

激光功率对激光熔覆Fe-36Ni因瓦合金涂层组织与耐磨性的影响

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