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有色金属工程:2019,9(9):-
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PREP工艺参数对AlSi10Mg铝合金粉末性能的影响
刘少伟, 段望春, 董兵斌
(甘肃省机械科学研究院有限责任公司)
Effect of PREP process parameters on properties of AlSi10Mg aluminum alloy powder
liushaowei, duanwangchun, dongbingbin
(Gansu Academy of Mechanical Sciences Co., Ltd.)
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投稿时间:2019-06-22    修订日期:2019-07-02
中文摘要: 利用等离子旋转电极雾化技术制备了AlSi10Mg铝合金粉末,研究了电极棒转速、直径、等离子弧电流及雾化介质对粉末性能的影响。结果表明,粉末粒度随着电极棒转速与直径的增大而减小,粒度呈正态分布,主要集中在74-150 μm之间。随着电流的增大,片状粉末增加,在电流为360 A时片状粉末Si、Mg元素烧蚀严重。增大雾化介质中氦气比例,粉末冷却速度增加,粉末粒度略微细化。通过粉末SEM形貌发现,粉末表面为发达的花瓣状胞状晶组织,后期可以增大氦气比例加快粉末冷却速度,得到表面更加光滑的球形粉末。
中文关键词: PREP  AlSi10Mg  工艺参数  粉末粒度
Abstract:AlSi10Mg aluminum alloy powder was prepared by plasma rotating electrode atomization technique. The effects of electrode rod rotation speed, diameter, plasma arc current and atomization medium on powder properties were studied. The results show that the particle size decreases with the increase of the rotation speed and diameter of the electrode rod, and the particle size is normally distributed, mainly concentrated between 74-150 μm. As the current increases, the flake powder increases, and when the current is 360 A, the flaky powder Si and Mg elements are ablated severely. Increasing the proportion of helium in the atomizing medium increases the cooling rate of the powder and slightly refines the particle size of the powder. It was found by powder SEM morphology that the surface of the powder was a well-developed petal-like cell structure. Later, the proportion of helium gas could be increased to accelerate the cooling rate of the powder, and a spherical powder with a smoother surface was obtained.
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刘少伟,段望春,董兵斌.PREP工艺参数对AlSi10Mg铝合金粉末性能的影响[J].有色金属工程,2019,9(9):.

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