Same level recycle of aluminum alloy body sheet for automobile by a high speed twin roll caster

采用高速双辊连铸机，对由杂质引起的铝合金车身板劣化进行了改进试验。在快速凝固的作用下，杂质变细。因此，可以消除变质。采用高速双辊连铸机时，可将铸件用铝合金浇铸到板材中，板材具有良好的拉深成形性。采用高速双辊连铸机进行快速凝固，可以防止铝合金的杂质变质。采用铝镁合金材料研制了高速双辊连铸机。采用高速双辊连铸机可有效防止杂质对合金力学性能的影响。

Improvement of deterioration of the aluminum alloy body sheet caused by impurity was tried using a high speed twin roll caster. The impurity became fine by the effect of the rapid solidification. Therefore, the deterioration could be eliminated. When the high speed twin roll caster was used, aluminum alloy for the casting could be cast in to the sheet, and this sheet had sound formability of deep drawing. The deterioration by impurity of the aluminum alloy for casting could be prevented by rapid solidification by the high speed twin roll caster. The high speed twin roll caster was adapted on Al-Mg alloy. The high speed twin roll caster was useful for the prevention of the deterioration of mechanical property by the impurity.