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首页> 外文期刊>Powder Metallurgy and Metal Ceramics >HYDRODYNAMIC PARTICLE-SIZE CLASSIFICATION OF ALUMINUM ALLOY POWDERS
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HYDRODYNAMIC PARTICLE-SIZE CLASSIFICATION OF ALUMINUM ALLOY POWDERS

机译：铝合金粉末的水动力颗粒尺寸分类

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摘要

Powder fractionation is an essential part of powder metallurgy processes. However, powder particles smaller than 40 mu m can hardly be classified. Meshes with openings smaller than 40 mu m are not used in conventional sieving because of very low effectiveness since powder is suspended above the sieve as a result of vibration, which makes it difficult for the particles to pass through the mesh. Powders with particles smaller than 40 mu m can be fractionated by hydroclassification. The hydroclassification of aluminum alloy powders and distribution of powder particle sizes are studied, and efficient hydroclassification methods are developed. Water-atomized aluminum powders and alloys have not been produced until recently because of the explosion hazard as hydrogen releases when aluminum interacts with water. A method is proposed for the hydroclassification and, thus, fractionation of powders over a wide range of particle sizes, including those smaller than 40 pan, beginning with 0-10 mu m.
机译：粉末分级是粉末冶金工艺的重要组成部分。但是，小于40μm的粉末颗粒几乎不能分类。具有小于40μm的开口的筛网由于其效率非常低而未在常规筛分中使用，因为粉末由于振动而悬浮在筛子上方，这使得颗粒难以通过筛网。粒度小于40微米的粉末可通过加氢分级分离。研究了铝合金粉末的水力分级和粉末粒度分布，并开发了有效的水力分级方法。直到最近才生产出水雾化的铝粉和合金，因为爆炸危险，因为铝与水相互作用时会释放出氢。提出了一种用于水力分级的方法，因此，可以对各种粒径的粉末进行分级分离，包括从0-10微米开始的小于40锅的粒径。

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