倾斜式冷却剪切技术制备Al-3%Mg半固态合金坯料  

Preparing semisolid billet of Al-3%Mg alloy by sloping cooling/shearing process

作　　者：管仁国[1] 康立文[1] 杜海军[1] 温景林[1] 崔建忠[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《中国有色金属学报》2006年第5期811-816,共6页The Chinese Journal of Nonferrous Metals

基　　金：辽宁省自然科学基金资助项目(20041006);国家自然科学基金与宝钢联合资助项目(50274020);教育部留学归国基金资助项目

摘　　要：应用自行设计倾斜式冷却剪切实验装置，对制备Al-3％Mg半固态合金坯料进行研究，分析工艺条件对半固态合金组织的影响，以及半固态合金坯料的二次加热组织及最优二次加热工艺。结果表明，采用倾斜式冷却剪切技术可以制备具有良好组织的Al-3％Mg合金半固态坯料。获得了制备半固态Al-3％Mg合金坯料的最优工艺条件：浇注温度660-680℃；倾角40°～60°。在合理的二次加热工艺条件下，可获得优良的适于进行触变成形的半固态合金组织。二次加热的最优工艺条件为：加热温度620～63℃；保温时间90～120min。By using the self-designed experimental setup of sloping cooling/shearing, preparing semisolid billet of Al-3%Mg alloy was studied. The effects of technological conditions on the microstructures of the semisolid alloy were analyzed, The microstructures of the remelted semisolid billet were observed and the optimal remelting process was investigated. The results show that the semisolid billet of A1-3% Mg alloy with good microstructures can be obtained by the sloping cooling/shearing process. The optimal process conditions for preparing semisolid billet of Al-3%Mg alloy were obtained： pouring temperature is in the range of 660 - 680℃, sloping angle is in the range of 40°- 60°. Under the proper remelting conditions, the excellent semisolid microstructures that are suitable for semisolid forming can he obtained. The optimal conditions of remelting process are： remelting temperature range of 620 - 630 ℃, holding time range of 90 - 120 min.

关 键 词：Al-3%Mg合金 半固态 倾斜式冷却剪切 显微组织 

分 类 号：TG111.4[金属学及工艺—物理冶金] TG244.1[金属学及工艺—金属学]