【摘要】 采用两种颗粒尺寸相差悬殊的高速钢粉末进行爆炸烧结机制的研究,发现了明显的“颗粒效应”。烧结过程首先在小颗粒变形量最大的尖角处发生熔化,在冲击波作用下使液体流激烈运动,加速了颗粒的熔化,最后使颗粒相互粘结在一起,达到烧结的目的。更多还原

【Abstract】 Mechanism of explosive sintering of two kings of high speed steel powder with remarkable difference in frain size is studied, In the course of sintering "grain effect" is found apparently. That is, for the HPS powder with the same composition,small grain is prior to melting than the large. The melting process takes place in peak pin.Melting bed will gradually build along the grain surface with the increase of shoce energy,there by resulting in intensifying fluid motion.accelerating grain melting.Finally grains bind each other,sinter-ing occurs.更多还原