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在QAl9-4铜合金上进行了同种金属沉积试验,研究了电火花沉积铜及铜合金的技术特点。结果表明,利用电火花沉积技术可以实现铜合金的大厚度沉积,获得了厚度达1.67 mm的沉积层;沉积层连续均匀,由大量近纳米尺寸的柱状晶组成,与基体呈冶金结合;沉积效率和电极损失率都随沉积功率的提高呈近似线性增大趋势;沉积率随沉积功率的增大呈现先增大,再保持,后降低的趋势;电极材料的物质过渡由电火花放电飞溅、熔化材料离心飞溅、熔融熔化材料摩擦涂覆组成。
The same kind of metal deposition test was carried out on QAl9-4 copper alloy, and the technical characteristics of EDC copper and copper alloy were studied. The results show that the deposition of large thickness copper alloy can be realized by EDM, and the thickness of the deposited copper alloy is 1.67 mm. The deposited layer is continuous and uniform and consists of a large number of near-nanometer size columnar crystals, which are metallurgically bonded with the substrate. The deposition efficiency And the electrode loss rate all increased approximately linearly with the increase of deposition power. The deposition rate increased first, then kept and then decreased with the increase of deposition power. The material transition of the electrode material was caused by spark discharge and melting Material Centrifugal Splash, Melt-Melt Material Friction Coated Composition.