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采用石墨型-砂型复合铸造工艺制作纯铜冷却壁,利用MAGMA软件模拟了该工艺下纯铜冷却壁的凝固过程,包括建立模型、网格划分、参数设置、模拟结果分析等。结果表明,冷却壁遵循着从内浇道向冒口端的顺序凝固,冷却壁砂型一侧(上表面)对石墨型一侧(下表面)起到补缩作用,铸件凝固后没有出现显著的铸造缺陷,获得了致密的组织,达到了设计要求。浇注温度在1 150~1 200℃时,预埋铜管与基体冶金结合良好。
The solidification process of pure copper stave was simulated by MAGMA software, including modeling, meshing, parameter setting and simulation results analysis. The solidification process of pure copper stave was simulated by graphite-sand composite casting process. The results show that the cooling wall follows the order of pouring from the runner to the riser, and the sand mold side (upper surface) of the cooling wall plays the role of feeding back to the graphite side (lower surface), and no significant casting occurs after the casting solidifies Defects, access to a dense organization, to meet the design requirements. Pouring temperature at 1 150 ~ 1 200 ℃, the embedded copper and the substrate metallurgical well.