冷铁工艺对Al-Si-Mg合金二次枝晶间距及致密度的影响  

Effects of Chill on the Secondary Dendrite Arm Spacing and Densification of Al-Si-Mg Alloy

作　　者：米国发[1] 王狂飞[1] 刘翔宇[1] 朱兆军[2] 王宏伟[2] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《铸造》2008年第3期261-265,共5页Foundry

基　　金：河南省杰出人才创新基金(062100070)

摘　　要：基于Al-Si-Mg合金的树脂砂铸造过程,研究了冷铁工艺对Al-Si-Mg合金铸件二次枝晶间距(SDAS)及致密度的影响。分析不同条件下铸件的凝固过程,研究了冷铁厚度、冷铁安放位置的改变对铸件二次枝晶间距的影响,考察了冷铁的热容量对铸件二次枝晶间距的影响;试验得到不同厚度冷铁的有效作用距离,在此基础上并结合试验结果,绘制了铸件模数、铸件长度及应加冷铁厚度之间的综合关系网络图,为指导实际生产提供了科学依据。Based on the resin bonded sand casting process, the effects of chill processes on the secondary dendrite arm spacing （SDAS） and densification of AI-Si-Mg alloy were studied. The solidification procedures under different conditions were analyzed, and the influences of the chill＇s thickness, position and thermal capacity orl the SDAS were discussed. The effective distances of chills with different thickness were obtained, and the functional relations among modulus, length of castings and thickness of chill were gained according to the experimental results, which can be used to guide practical production.

关 键 词：冷铁工艺 二次枝晶间距 致密度 AL-SI-MG合金 

分 类 号：TG27[金属学及工艺—铸造]