KF对钠盐变质剂变质效果的影响

在泛用钠盐变质剂（30%NaF+50%Nacl+10%Kcl+10%Na3AlF6）中加入少量的KF代替Na3AlF6,对共晶铝硅合金的变质作用与钠盐变质剂比较,合金抗拉强度提高10%以上,延伸率可提高52%左右,变质效果稳定,且具有长效和重熔作用。

INFLUENCE OF KF ON MODIFCATION OF NA SALT MODIFIER FOR AL-SI ALLOYS

The influence of KF on modification of Na salt modifior for Al-Si alloys is investigated in This paper. Practical experience shows that if additional K F is added to Na Salt modifier (30% NaF+50% Nacl+ 10% Kcl+10% Na_3AlF_6) to replace Na_3AlF_6, The strength and The elonga-tion of Al-Si alloys can be separatcly surpassed 10% and 52%. The modification of this modifier is stable, The effective modifying period can last 4 hours, and has remelting effect to The Al-Si alloys.