【摘要】 采用环状飞片柱面收缩爆炸方法,研究了FT15高速钢粉末在冲击波作用下,因粉末粒度的差异而引起的颗粒效应:在动态冲击载荷的作用下金属细粉比粗粉吸收的能量多,温度高,致使细粉比粗粉表层更易熔化,熔化量也相对增加。同时发现在FT15高速钢混合粉爆炸烧结后粉末中的大颗粒与小颗粒的变形规律不同。更多还原

【Abstract】 In this paper, two different sizes of high-speed-steel powders have been mixed and then consolidated dynamically by means of a cylinderical converging explosive method with a ring-shape flyer. It has been found that the behaviors of large powder particles differ from that of small powder partieles. After the passage of shock-wave the energy absorption on small powder particles is much greater than that on large powder particles, so that the small power particles may melt prior to large powder particles.更多还原