Ca对共晶Al-Si合金磷变质效果的影响  

Influence of Calcium on Phosphorus Modifying Eutectic Al-Si Alloys

作　　者：乔进国[1] 刘相法[1] 刘相俊[1] 边秀房[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061

出　　处：《铸造》2004年第1期38-40,共3页Foundry

摘　　要：利用金相和电子探针微量分析仪(EPMA)等手段研究了共晶Al Si(ZL109)合金熔体中Ca对Al Si合金变质效果的影响。结果表明:合金中的Ca能使P变质失效,甚至出现类似Na变质处理的效果。分析表明:Ca能与合金熔体中的P形成比AlP更稳定的CaxPy化合物,从而抑制了P变质作用的发挥;C2Cl6精炼可使CaxPy化合物分解,重新形成AlP,从而使P变质效果得以恢复。The influence of calcium on phosphorus modification eutectic Al-Si alloys was investigated in this article by optical microscopy and electron probe micro-analyzers (EPMA). It has been shown that calcium can make P modification inefficient, even similarly producing sodium modification efficiency as the result of the formation of Ca_xP_y compounds which is more stable than AlP phases in the melt. The P modification efficiency can recovered after refining treatment by C_2Cl_6 because of the formation of AlP again.

关 键 词：Al—Si合金 变质效果 精炼处理 钙元素 

分 类 号：TG292[金属学及工艺—铸造]