通过数值模拟获得了高频加热-轧制复合过程中的动态温度场.使用的简化模型中热传导方 程的离散采用隐式差分法、区域的离散采用内节点法, 并以Maxwell方程的解确定内热源分布. 考虑到铁磁性物质在温度跨越Curie点时磁导率的突变, 推导了适用于该情况的Maxwell方程一般解. 在此基础上分别模拟了钢-铝,钢-铜和钢-不锈钢这3类板的复合, 给出了工艺参数的优化组合.
The dynamic temperature field during roll-bonding combined with high-frequency alternating current heating has been numerically simulated by a simplified model. In the simplified model, the governing equation of heat conduction is discretized using implicit finite difference method, and the computational domain is discretized using cell centered scheme, and the solution of Maxwell equation is used to determine the distribution of the internal heating sources. Considering the saltation of magnetic permeability of the ferromagnetic material when its temperature is more than the Curie point, the general solution of Maxwell equation is deduced. Based on our new method three kinds of composite strips (steel-Al, steel-Cu, steel-stainless steel) are performed numerically to validate the feasibility of the combination of various technical parameters.
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