往复运动真空冶金射流快速凝固制备层状铝合金

Fabricating of Layered Aluminum Alloy by Jet Rapid Solidification based on Reciprocate Motion Baseplate

高真空及惰性气体环境中,2024铝合金冶金熔化后,熔液液柱射流沉积到计算机控制的往复运动机构的铜模具基板上,液流发生横向铺展并快速凝固。往复运动过程反复进行,铝合金凝固层以砌墙方式堆积生长,整个冶金过程在时间上被分散,热耗散可以充分进行,从而可以获得快速凝固的层状铝合金材料。对层状铝合金进行组织观察和力学性能检测。结果表明:真空往复运动冶金射流快速凝固法可以制备具有冶金结合、致密细小、亚稳组织的块体金属材料;层状铝合金为冶金结合,金相组织细小,力学性能高于传统铸造铝合金。

2024 aluminum alloy was metallurgical jet deposition to the computer controlled reciprocating motion device with a Cu mould in the inert gas environment. The molten liquid column of Al alloy was lateral spreading and rapid solidified. Reciprocating motion depositing process repeated,and the new layer of aluminum alloy solidified based on the last solidified later as laying bricks. The whole metallurgical process was dispersed in time and heat dissipation was adequately. By this method rapid solidification layers of aluminum alloy material was achieved. Microstructure of laminar aluminum alloy was observed and mechanical properties were test. Laminar aluminum alloy be with the metallurgical bonding,fine microstructure,and mechanical properties is higher than the traditional casting aluminum alloy.