Effect of Coating Preparation Process on Properties of Vanadium-titanium Modified Cold Working Die Steel

The vanadium-titanium modified cold working die steels were surface treated by various coating preparation processes.The wear resistance at room temperature of 25 ℃ and high temperature of 300 ℃,and impact property at room temperature of 25 ℃ were tested and analyzed. The results show that when the composite process of flame spraying followed by laser cladding was used,the wear volume of the die steel at room temperature decreased by 23% and 27%,its wear volume at high temperature decreased by 46% and 50%,and the impact absorption energy increased by 29% and 18%,compared with those of the steels separately by coating preparation process of flame spraying and laser cladding,respectively.