固液铸造技术在高铬铝合金中的应用研究  

Solid-Liquid Mixed Casting Technology and Its Application in Al-Cr Alloy

作　　者：李建跃[1] 刘劲松[1] 陈振华[2] 何建军[2] 

机构地区：[1]长沙航空职业技术学院,湖南长沙410124 [2]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《铸造》2008年第2期173-175,共3页Foundry

摘　　要：采用一种全新的材料制备工艺——固液混合铸造技术制备了Al-Cr合金坯料。采用该技术获得的Al-Cr合金坯料的金相显微组织均匀,晶粒细小,呈等轴状或近等轴状,热挤后合金的力学性能为:σb=119.4MPa,σ0.2=89.3MPa,δ=1%,优于传统铸造和半固态铸造合金,使难以应用的高铬铝合金有了应用可能。A preparation technology-solid-liquid mixed casting, was adopted to produce Al-Cr alloy, which can＇t be prepared by the conventional casting methods. The optimum mechanical properties after hot extrusion were σb=119.4 MPa, σ0.2=89.3, MPa and δ=1%, which are better than those of conventional casting and semi-solid casting. Thus, the high chromium aluminum alloy, which is difficult to be used, had the possibilities of application.

关 键 词：固液混合铸造 铝铬合金 显微组织 

分 类 号：TG27[金属学及工艺—铸造]