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为了提高涡轮叶尖端部的耐磨性能,以钴基合金粉末为涂层原材料,利用CO2激光器,在镍基合金表面上熔覆了优质耐磨涂层。采用销盘式摩擦磨损试验机进行了镍基合金及激光熔覆涂层的干摩擦磨损试验。试验结果表明,镍基合金的平均摩擦系数为0.48,钴基合金涂层的平均摩擦系数为0.30,钴基合金涂层的平均磨损量低于镍基合金材料,说明钴基合金涂层具有较高的耐磨性。
In order to improve the wear resistance of tip of turbine blade, Co-based alloy powder is used as coating raw material, CO2 laser is used to coat high quality wear-resistant coating on the surface of Ni-based alloy. Dry friction and wear tests of Ni-based alloy and laser cladding coatings were conducted by using pin-plate friction and wear tester. The experimental results show that the average friction coefficient of nickel-based alloy is 0.48, the average friction coefficient of cobalt-based alloy coating is 0.30, the average wear of cobalt-based alloy coating is lower than that of nickel-based alloy, indicating that cobalt-based alloy coating has more High wear resistance.