高铝锌基合金挤压铸造的组织和性能的研究

Study on mechanical properties and microstructure of Zinc-based alloy Zn-27% Al in squeeze casting

研究了高铝锌基合金 ( Zn- 2 7% Al)挤压铸造的组织和性能。挤压铸造显著提高合金的塑性和韧性 ,延伸率由重力铸造时的 1 %～ 3%提高到 1 0 %～ 1 8% ,冲击强度由重力铸造时的2 0～ 50 J/cm2提高到 95～ 1 37J/cm2。与重力铸造相比 ,合金的组织显著细化 ,组织中共晶体含量增加 ,ε相 ( Cu Zn4 )的含量减少。

An investigation was conducted to study the property and the structure on squeeze castings of Zn 27%Al alloy Plasticity and ductility were improved significantly by squeeze casting The results showed that elongation of squeeze casting increases 1%~3% to 10%~18% in gravity castings and impact strength increases 20~50J/cm 2 to 95~137J/cm 2 in gravity castings The microstructure is fined remarkably and eutectic phases increase and ε phase(CuZn 4)reduces compared with gravity casting alloy