B对过共晶Al-Si合金初晶Si的细化作用  

Modification of the primary silicon in hypereutectic Al-Si alloy by boron

作　　者：庞金辉[1] 崔庆玲 王明星[1] 刘志勇[1] 刘忠侠[1] 宋天福[1] 

机构地区：[1]郑州大学物理工程学院,教育部材料物理重点实验室

出　　处：《特种铸造及有色合金》2008年第S1期140-142,共3页Special Casting & Nonferrous Alloys

摘　　要：研究了B对过共晶Al-20Si合金中初晶Si的细化作用。结果表明,B对过共晶Al-Si合金初晶Si有较好的变质效果。初晶Si的尺寸先随B含量的增加而减小,当B的添加量为0.065%时达到最佳的细化效果,之后初晶硅的尺寸开始随B含量的增加而增大。The modification of the primary silicon in hypereutectic Al-20wt.% Si alloy by boron has been investigated. The results show that boron addition can obviously modify the primary silicon in hypereutectic Al-20wt.% Si alloy. The size of the primary silicon decrease with the increase of boron addition content from 0 to 0.065 wt.%,and the minimum size of the primary silicon can be obtained at the boron addition content of 0.065 wt.%. But, the size of primary silicon increases if the boron addition content is co...

关 键 词：过共晶AL-SI合金 AL-B中间合金 初晶SI 变质 

分 类 号：TG146.21[一般工业技术—材料科学与工程]