| In order to imporve the wear-and heat-resistance of high carbon steel, a surface alloyed layer was created on a SK-3 steel with tungsten carbide by irradiation of Co₂ laser. The object of this work was to investigate the effects of powder size and coating thickness of tungsten carbide, and the heat treatment on the mechanical properties of the laser surface alloyed layer, The results showed that tungsten carbide was distributed homogeneously throughout the alloyed layer. The amount of tungsten and the hardness in alloyed layer were dependent upon the powder size and the thickness of coated layer. When alloyed layer was formed by overlapping laser tracks, the microhardness of this region decreased slightly. When the specimem was heat treated, the microhardness tended to increase depending upon the amount of tungsten in the alloyed layer. |
|
