过共晶高硅铝合金的包覆轧制工艺初步研究  

Cladding-rolling for Hypereutectic High Si Aluminum Alloy

作　　者：杨伏良[1] 甘卫平[1] 陈招科[1] 

机构地区：[1]中南大学

出　　处：《特种铸造及有色合金》2005年第2期73-74,共2页Special Casting & Nonferrous Alloys

基　　金：国防科学技术工业委员会资助项目 (MKPT- 0 3 - 1 51 )

摘　　要：对熔铸法制备的Si的质量分数大于 2 6%的高硅铝合金锭坯的后续包覆轧制工艺进行了初步研究。采用包覆轧制 ,对经变质处理后的高硅铝合金进行热轧 ,采用多道次小变形量的方式 ,热轧变形量可大于 60 %而不开裂。冷轧后各试样的轧制总变形量可大于 90 % ,并借助金相显微镜对该材料各种状态的组织进行了对比分析。结果表明 ,包覆轧制可有效阻止脆性材料裂纹的扩展 。Cladding-rolling for high Si aluminum alloy ingot with a Si mass fraction of higher than 26% prepared by smelting-casting technology was conducted.Distortion rate of un-cracked modified high-Si aluminum by hot-rolling with multi-times and minor distortion can be more than 60% while the total distortion can be more than 90% by cold-rolling.The microstructures of the alloy under hot-rolling and cold-rolling conditions were analyzed and compared by the OM.It was found that cladding-rolling can efectively prevent crack propagation so that the forming problem in brittle material can be solved.

关 键 词：电子封装 变质处理 包覆轧制 显微组织 过共晶 

分 类 号：TG333[金属学及工艺—金属压力加工]