YL112铝合金流变压铸的组织及力学性能研究

Microstructure and Mechanical Properties of Rheo--Die Casting YLl12 Aluminum Alloy

本文介绍了YL112铝合金半固态流变压铸成形试验，研究了流变压铸YL112铝合金的组织和力学性能。试验结果表明：与液态压铸成形件相比，半固态压铸成形件压铸缺陷较少，力学性能优良，热处理后性能进一步提高。从微观角度解释了两种不同成形方法产生这一性能差异的内在原因。

Microst ruct ure and mechanical properties of rheo -- die casting YL112 aluminum were investigated with die casting semi -- solid billets on DCC280 horizontal die casting machine. The results indicate that： comparing with liquid die castings , the die castings have desirable mechanical properties and little defects, Furthermore , the mechanical properties of the die castings can be improved after heat treatment. Meanwhile the mechanism of why the semi--solid castings are superiors to the liquid die castings is also discussed f tom the microcosmic view.