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。 Two kinds of high-speed steel powders with different particle sizes were used to study the mechanism of explosion sintering. The obvious “grain effect” was found out. The sintering process first melts at the sharp corners with the largest amount of deformation of the small particles, and makes the liquid flow fiercely move under the effect of the shock wave, accelerating the melting of the particles, and finally bonding the particles to each other to achieve the purpose of sintering.