Laser clad coatings consisting of a Ni-based matrix and tungsten carbide (WC) hard phases are used for heavy wear protection of components in many industries. Matrix composition and WC type can be chosen to give these composites resistance to erosive/abrasive wear, as well as to the impacts of particles and corrosion. Maintaining ductility in the matrix is important, so that it can absorb impact energy and minimize cracking, thus avoiding penetration of corrosive media through cracks and subsequent corrosion in the substrate-cladding interface. Claddings were tested for their impact resistance by means of a single impact with a hard, spherical indenter. The depth of impact craters was measured, and the cracking behavior was analyzed. Corrosion resistance of Ni/WC composites, a HVOF WC/CoCr coating and a hard chrome reference coating were tested by electrochemical corrosion in a 3.5 wt.% NaCl solution and by exposure for up to 1000 h in a salt spray test.

由镍基基体和碳化钨（WC）硬相组成的激光熔覆涂层在许多行业中用于部件的重度磨损保护。可以选择基体成分和WC类型，以使这些复合材料具有耐腐蚀性/耐磨损性以及颗粒和腐蚀的影响。保持基体的延展性很重要，因此它可以吸收冲击能量并最大程度地减少裂纹，从而避免腐蚀性介质穿透裂纹以及随后在基材-覆层界面发生腐蚀。用硬质球形压​​头一次冲击测试覆层的抗冲击性。测量冲击坑的深度，并分析开裂行为。Ni / WC复合材料的耐腐蚀性，