强磁场对铝硅合金变质效果的影响  

Effects of strong magnetic field on modification of Al-Si alloy

作　　者：连峰[1] 李廷举[2] 

机构地区：[1]大连海事大学机电与材料工程学院,辽宁大连116026 [2]大连理工大学材料工程学院,辽宁大连116024

出　　处：《大连海事大学学报》2007年第2期7-11,共5页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(50234020)

摘　　要：为解决Al-Si合金存在的Na变质重熔失效和有效时间短及P变质处理后初晶Si偏聚问题,利用施加强磁场的方法,分别对亚共晶Al-6%Si合金和共晶Al-12.6%Si合金进行Na盐变质处理,对过共晶Al-18%Si合金进行P盐变质处理.结果发现对于亚共晶Al-6%Si合金,施加强磁场的条件下重熔,Na变质没有失效;对于共晶Al-12.6%Si合金,施加强磁场延长了变质有效时间;对于过共晶Al-18%Si合金,施加强磁场使凝固组织中的初晶Si相均匀分布.强磁场有助于改善Al-Si合金的变质效果.Strong magnetic field method was adopted to solve the problems, such as the loss of efficiency after re-melt, the short effective time after Na modification, and the primary Si distributed unevenly after P modification. Al-6%Si hypoeutectic alloy and Al-12.6%Si eutectic alloy were modified with Na-salt, and Al-18 %Si hypereutectic alloy was modified with P-salt in strong magnetic field respectively. The experimental results show that for Al-6 % Si hypoeutectic alloy, the magnetic field can avoid the loss of efficiency, and for Al-12.6%Si eutectic alloy, the strong magnetic field can prolong the effective time of the modification. For Al-18%Si hypereutectic alloy, the primary Si distributes evenly when the strong magnetic field imposed. Experimental results also show that the strong magnetic field can improve the modification.

关 键 词：强磁场 铝硅合金 变质处理 共晶Si 初晶SI 

分 类 号：TG249.9[金属学及工艺—铸造]