Hot rolling refers to rolling performed at a temperature higher than the recrystallization temperature. The hot rolling process can significantly reduce energy consumption and reduce costs. The metal has high plasticity and low deformation resistance during hot rolling, which greatly reduces the energy consumption of metal deformation, and can improve the processing performance of metals and alloys, that is, the coarse grains in the as-cast state will be broken, and significant crack healing will be achieved, reducing or eliminating casting defects To transform the as-cast structure into a deformed structure and improve the processing performance of the alloy.