【摘要】 针对高端制造行业对绿色制造耐磨抗蚀涂层的高需求,对比分析了国内外超高速激光熔覆装备发展情况,着重介绍了自主研发的超高速激光熔覆设备.采用自主研发的超高速激光熔覆装备,分别进行了单道和多道熔覆的涂层试验,利用扫描电镜(SEM)、显微维氏硬度计和电化学工作站对涂层的界面质量、微观形貌和组织、力学性能以及耐蚀性能进行了系统的研究,同时与其他类型涂层做了横向对比分析.研究结果表明:超高速激光熔覆技术的加工效率高,可制备涂层种类多,适合工程化推广应用;制备的涂层表面成形好,内部组织结构致密无缺陷,与基体结合强度高,力学性能和耐蚀性能优异,能够满足高端装备关重件表面强化和功能化等众多需求.更多还原

【Abstract】 In view of the high demand of green manufacturing wear-resistant and anti-corrosion coatings in high-end manufacturing industries, the development of super-high efficient laser cladding equipment at home and abroad is compared and analyzed, and the emphasis on self-developed one is introduced. The single-pass and multi-pass coating tests were carried out using the super-high efficient laser cladding equipment. The interfacial quality, microstructure, mechanical properties and corrosion resistance of the coatings were systematically studied by scanning electron microscope(SEM), micro-Vickers hardness tester and electrochemical workstation, and compared with other coatings fabricated by different types of coating technologies. The results show that the super-high efficient laser cladding technology has high processing efficiency, and can manufacture many kinds of coatings. Therefore, this technology is very suitable for industrial applications. The prepared coatings have good surface forming, dense internal microstructure and no defects with high bonding-strength to the substrates. The coatings possess excellent mechanical properties and corrosion resistance, which can meet the requirements of surface reinforcement and functionalization of heavy parts in high-end equipment.更多还原