采用电磁搅拌铸造法制备了Mg-12Mn中间合金,通过正交试验法考查了Mn粉粒度、搅拌功率、搅拌时间及冷却方式等参数对Mg-Mn中间合金中Mn含量及其分布的影响,并将Mg-12Mn中间合金通过配料计算制备成MB1合金.通过化学分析、金相观察、XRD等表征手段分析表明:在本试验条件下,Mg-12Mn中间合金较优制备工艺参数为粉体粒度150～68μm,10kW/4min,铜模空冷.MB1合金中Mn的收得率为86.1%.
The Mg-12Mn master alloy was successfully prepared by electromagnetic stirring method in the present work. The key processing parameters such as the particle size of Mn powder, the power of electromagnetic stirring, the stirring time and the way of cooling were developed for the higher Mn-content and the better distribution of Mn by orthogonal experiment. In addition, Mg-12Mn master alloy was successfully applied to manufacture MB1 by burden calculation. The master alloy was characterized by chemical analysis, OM, XRD. The results show that in the experiment conditions, the Mg-12Mn master alloy with excellent performance can be manufactured by adding Mn powder with the particle size ranged between 150-68μm in stirring at 10kW for 4min,cooling in the mold made of Cu. Mn yielding rate of MB1 is 86.1%.
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