水冷铜质蛇形通道制备半固态A380铝合金浆料  

Preparation of Semi-Solid A380 Aluminum Alloy Slurry by a Water Cooling Serpentine Channel

作　　者：刘志勇[1] 毛卫民[1] 王伟番 郑志凯[1] 

机构地区：[1]北京科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2015年第2期130-133,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB606300);国家自然科学基金资助项目(50774007)

摘　　要：采用水冷铜质蛇形通道制备了半固态A380铝合金浆料，研究了浇注温度、弯道数量、冷却水流量对半固态A380铝合金浆料组织的影响。结果表明，随着浇注温度的降低，初生a—A1晶粒尺寸减小、形状因子提高；浇注温度在610～630℃时，可以获得理想的半固态浆料组织。随着水冷铜质蛇形通道弯道数量增加，半固态浆料组织中初生a—A1晶粒更加细小、均匀、圆整。水冷铜质蛇形通道冷却水流量为500L／h时，可以获得初生a—A1晶粒细小、圆整的半固态浆料组织。The semi-solid slurry of A380 aluminum alloy was prepared by a water cooling copper serpen- tine pouring channel, and influences of pouring temperature, the number of curves and the flow of cool- ing water on the microstructure of semi-solid A380 aluminum alloy slurry were investigated. The results demonstrate that grain size of the primary a-A1 is decreased and its shape factor is increased with the de- crease of pouring temperature. Satisfied semi-solid slurry was prepared with pouring at 610 ℃ to 630 ℃. With the increase of number of curves, the primary a-A1 grain size in the semi-solid slurry can be re- fined with more homogeneous distribution and spheroidization. When the flow of cooling water reaches 500 L/h, the microstructure of semi-solid slurry become finer and more spherical.

关 键 词：A380铝合金 蛇形通道 半固态浆料 初生Α-AL 

分 类 号：TG249.9[金属学及工艺—铸造]