Numerical Simulation and Process Optimization of Semi-continuous Casting 6061 Aluminum Alloy
Author of the article:ZHANG Zhuo , HE Shengping ,WANG Xinzhang , YE Qiang ,YANG Lin , WANG Yishan, JIANG Kaixi , SHAN Chan
Author's Workplace： Liaoning Key Laboratory of Solidification Control and Digital Preparation Technology, School of Materials Science and Engineering, Dalian University of Technology; SDIC Ningxia Qingtongxia New Material Co., Ltd.,;NingBo Institute of Dalian University of Technology
Key Words： 6061 aluminum alloy; semi-continuous casting; numerical simulation; thermal-mechanical coupling
Abstract：
To solve defects such as hot cracks in semi-continuous 6061 aluminum alloy casting products, a thermal-mechanical coupling model of semi-continuous casting of φ254 mm 6061 aluminum alloy round ingot was established by using ProCAST software. The reliable boundary heat transfer conditions were determined according to the actual working conditions. The influences of casting speed, casting temperature and starting time of the dummy head on the temperature field and stress field were analysed. The results show that a better temperature field and stress field distribution can be obtained by appropriately reducing the casting speed and casting temperature. Controlling the casting speed to 80~84 mm/min and the casting temperature to 680~690 ℃ are the optimal production process intervals for semi-continuous casting of φ254 mm 6061 aluminum alloy round ingots.
