碳化钨增强镍基合金熔覆层及其耐磨性

研究了在钢表面喷涂或涂敷镍基合金碳化钨涂层、然后用氧乙炔焰或高频加热重熔制得熔覆层的可能性。结果表明，熔覆层能与基体形成牢固的冶金结合，其厚度为１．３～１．７ｍｍ。熔覆层的耐磨性随碳化钨含量的增加而增加。当碳化钨含量为３０％和４０％时，熔覆层比硼化物层的耐磨性分别提高０．３２和６．５９倍。

The Ni Base Alloy Cladding Layers Strengthened by WC and the Wear Resistance

This paper studies a kind of casehardening technology that Ni-WC-base alloy powder is sprayed or coated on steel and then it is clad by O 2-C 2H 2 flame or high frenquency induction current to produce the Ni-base alloy cladding layers strengthened by WC. The results show that the cladding layers, whose depths are from 1 5 to 1 7 mm, have welding joint with steel bed. The wear resistance of the cladding layers is improved along with the increase of WC content. Compared with boride layers, the wear resistance separately increases by 32 % and 659 % when WC content is 30 % and 40 % respectively. The technology is effective for strengthening the surface of metals, especially the parts of farm machinery.