【摘要】 利用Fluent软件建立模型，模拟研究了2.8 kA和3.3 kA电流条件对真空电弧重熔过程中多物理场耦合行为的影响，并对铸锭枝晶间距进行模拟和实验测定研究.结果表明：随着时间的增加，铸锭逐渐凝固，同时熔池变深；随着电流的增大，电流密度、磁场强度、焦耳热、洛伦兹力、流场和温度场等数值均增大，熔池也变深；一次枝晶间距和二次枝晶间距从铸锭中心到铸锭边缘不断减小，并且电流的增大使同一位置的一次枝晶间距和二次枝晶间距均增大.更多还原

【Abstract】 Fluent software was used to establish a model to simulate the influence of 2.8 kA and 3.3 kA current conditions on the multi-physical field coupling behavior during vacuum arc remelting, and the dendrite spacing of the ingot was simulated and experimentally measured. The results show that as time increases, the ingot gradually solidifies and the molten pool becomes deeper; The primary dendrite spacing and secondary dendrite spacing decrease from the center of the ingots to the edge of the ingots, and the increase of current also increases the primary dendrite spacing and secondary dendrite spacing at the same position.更多还原