在氢气保护性气氛下,采用半固态轧制工艺将Al-5.8Zn-1.63Mg-2.22Cu-0.12Zr (wt％)粉末制备出生带材.研究了加热相同温度610℃(i.e.液相分数fs≈53％)时,不同的加热时间对生带材显微组织的影响,重点研究了液相渗透现象.结果表明:液相渗透程度越高,颗粒在接触界面的边界加速消失,颗粒边界发生了较大的变化.当在610℃下加热,保温时间由10 min延长至30 min时,η(MgZn2)相的数量减少,且在晶界处析出了更多的Al2Cu颗粒.Al-5.8Zn-1.63Mg-2.22Cu-0.12Zr (wt％)粉末在610℃下半固态轧制,其最优的保温时间为20～30 min.研究结果表明通过优化半固态轧制工艺可以制备出性能优异的带材.
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