Scandium in these alloys exhibits obvious grain refining,improved strength and serves to inhibit recrystallization in Al alloys,strengthen welds and eliminate hot cracking from welds.

• 钪对铝合金有明显的晶粒细化作用,提高了铝合金强度,抑制了再结晶,强化了焊缝,消除了焊缝出现的热裂。