双辊铸轧AZ91D半固态镁合金板带试验研究

Research of Biroller Casting and Rolling AZ91D Semi-solid Magnesium Alloy Strip

在自行设计、安装的双辊连续、水平铸轧机上进行AZ91D镁合金半固态板带铸轧试验研究，分析了镁合金半固态浆料的制备过程，在590℃左右机械搅拌5min，在550-585℃温度区间内进行铸轧。结果表明，半固态连续铸轧技术可以提高板带的塑性加工性能，细化晶粒。在380℃时进行热轧再加工，最大压下率达到46％。

Experimental study on the twin roll semi-solid strip casting and rolling of AZ91D magnesium alloy was carried out using twin roll caster. Semi-solid slurry preparation has been analyzed,and the optimal operating parameters, such as the melting temperature and the casting speed were examined. With mechanical milling at about 590 ℃, it was casting and rolling at 550- 585 13. The result shows that the technology of semi-solid strip casting and rolling can improve plastic processing property and refine grain. In addition,the maximal reduction arrived 46 % when the magnesium alloy has been hot rolled at 380 13.