蛇形通道浇注法制备半固态A380铝合金浆料  

Preparation of Semi-solid A380 Alloy slurry by the Serpentine Channel Pouring

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1期48-51,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：采用石墨质蛇形通道浇注法制备半固态A380铝合金浆料,研究了浇注温度、弯道数量和弯道内径对半固态A380铝合金浆料组织的影响。结果表明,浇注温度在610~650℃范围时可获得理想的半固态A380铝合金浆料,半固态A380铝合金浆料组织随浇注温度的降低,由蔷薇晶组织向近球晶或球晶组织演变。在相同浇注温度条件下,弯道数量的增加或通道内径尺寸的减小都可细化半固态A380铝合金浆料组织中的初生α-Al晶粒,提高形状因子,进而优化其浆料组织。The semi-solid slurry of A380 aluminum alloy was prepared through a serpentine pouring channel,and influences of pouring temperature,the curve numbers and the curve diameters in a serpentine channel on microstructure of the alloy slurry were investigated.The experimental results show that the satisfactory semi-solid A380 aluminum alloy slurry can be obtained with the pouring temperature at 610℃ ~ 650 ℃.The microstructure of the semi-solid A380 alloy slurry can be evolved from rossette to spherical particle.At a given pouring temperature,the particle size of primaryα-Al can be decreased and the shape factor of primaryα-Al is increased with the increases of the curve number or decrease of the diameter of the curve,at the same time,the microstructure of semi-solid A380 alloy slurry can be optimized.

关 键 词：半固态 A380铝合金 蛇形通道 初生Α-AL 

分 类 号：TG249.9[金属学及工艺—铸造]