压铸条件下过共晶铝硅合金P变质的必要性  

P Modification on Hypereutectic Die Casting Al-Si Alloy

作　　者：张士佼[1] 边秀房[1] 孟庆格[2] 

机构地区：[1]山东大学 [2]上海交通大学

出　　处：《特种铸造及有色合金》2005年第11期679-680,共2页Special Casting & Nonferrous Alloys

基　　金：山东省自然科学基金资助项目(Z2004F02)

摘　　要：在铝合金压铸生产过程中,AlP中间合金变质处理和压力铸造工艺都能够使过共晶铝硅合金中的初晶硅晶粒细化。探讨AlP中间合金变质处理,分别在压铸工艺条件下和普通金属型条件下,对过共晶Al15Si合金组织的不同影响。试验表明,压铸条件下未经AlP变质的和经AlP变质的Al15Si合金与金属型条件下未经AlP变质的Al15Si相比,初晶Si尺寸分别减小50%和75%左右;在相同的压铸工艺条件下,AlP变质后Al15Si合金初晶Si尺寸,比未经过AlP变质的Al15Si合金初晶Si尺寸减小40%左右。论证了在AlSi系过共晶铝合金压铸件生产过程中,AlP中间合金进行变质处理的必要性。Both master alloy and die casting technology can refine the grain size of primary Si in hypereutectic Al-Si alloy in die casting. The effects of Al-P master alloy on the microstructures of hypereutectic Al-5Si alloy in die casting and in metal mold casting were approached. It is revealed that compared with microstructure of hypereutectic Al-Si alloy without Al-P master alloy modification in metal mold casting, the grain size of primary Si phase without Al-P master alloy modification is reduced by 50% while with Al-P modification is decreased by 75% in die casting. Compared with that of the alloy without Al-P modification in die casting, the primary Si size with Al-P modification in die casting is decreased by 40%. It is necessary to modify the hypereutectic Al-Si alloy by Al-P modifier in die casting.

关 键 词：AL-P中间合金 变质 压铸 显微组织 

分 类 号：TG249.2[金属学及工艺—铸造]