新型倾斜板技术制备A2017半固态合金  

Preparation of A2017 Semi-solid Alloy by a New Wave-like Sloping Plate Process

作　　者：谢丰广[1] 管仁国[2] 王付兴[2] 刘相华[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室 [2]东北大学材料与冶金学院

出　　处：《特种铸造及有色合金》2008年第10期766-768,共3页Special Casting & Nonferrous Alloys

基　　金：国家高技术研究发展计划(863计划)资助项目(2007AA03Z111);国家自然科学基金资助项目(50604007)

摘　　要：采用新型的波浪型倾斜板技术,对制备半固态A2017合金进行了研究。熔融的合金在倾斜的波浪型冷却板表面非均匀形核,并在流动与碰撞剪切的条件下生长,逐渐从粗大的等轴晶网络演化为细小的近球形晶。通过试验发现,在浇注温度为720℃、倾角为45°的条件下,选用长度为400～500mm有间隔波浪的室温倾斜板可获得细小均匀的合金组织。坯料在二次加热温度为625℃、保温时间为60min的条件下,球化理想,适合于触变成形。Preparation of A2017 semi-solid alloy was conducted by means of a new wave-like sloping plate method. The molten alloy was heterogeneously nucleated on surface of wave-like sloping plate and was grown in the condition of flow, collision and shearing, resulting in the gradual evolution of coarse net-work equiaxed grain into fine spheroid particle. The microstructure with fine uniform distribution in the semi-solid alloy can be successfully prepared with pouring at 720 ℃ on the interval wave-like sloping plate with length in 400~500 mm and declined angle of 45°. Furthermore, the desirable spheroidized structure suitable for thixo-forming was obtained with re-heating at 625 ℃ for 60 min.

关 键 词：A2017合金 波浪型倾斜板 半固态 组织 

分 类 号：TG292[金属学及工艺—铸造]