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热喷涂工艺对硬质合金喷涂粉的要求是 :1、每个颗粒已完全形成了硬质合金的显微结构 ,通过喷涂工艺形成的涂层不会有明显变化。 2、要求流动性好即很好的成球性和填充性。3、极窄的粒度分布。本文发现通过冲击破碎体积粉碎和气流分级等整形处理以去掉太多的棱角后的热喷涂用硬质合金粉性能有明显的改善 ,满足了热喷涂工艺的要求。
The requirements of the thermal spraying process for cemented carbide powder are as follows: 1. Each particle has completely formed the microstructure of the cemented carbide. The coating formed by the spraying process will not change obviously. 2, requiring good liquidity that is good ball and filling. 3, very narrow particle size distribution. In this paper, we found that the performance of the thermal spraying cemented carbide powder can be obviously improved by the crushing and crushing volume crushing and air flow grading treatment to remove too many corners, which meets the requirements of the thermal spraying process.