Preparation of Ni45 Alloy Coating with Directional Structure and its Wear Resistance

Ni45 alloy coating with the directional structure was prepared by using the induction remelting and forced cooling. The microstructure, phase constitution, microhardness, and wear resistance of the coating were investigated by SEM, XRD, microhardness tester, and tribometer. The results showed that the directional structure is formed in the coating, and compared with the simple remelting coatings, the coating with the directional structure exhibits denser microstructure, wider interface and excellent wear resistance. The wear weight loss of the coating with the directional structure is about 10 times less, 9.3 times less and 10.3 times less than that of the as-sprayed coating at loading 50, 100 and 150 N, respectively. And that is 0.12 times less at 50 N, 1.2 times less at 100 N, and 1.3 times less at 150 N than that of simple remelting coating.