为获得柱状晶结构的金属材料,本文对晶粒组织采取定向退火来实现。文中采用相场法,使用matlab编程模拟晶粒组织在具有一定宽度和温度均匀的热区形成柱状晶演化,并研究了热区温度、热区宽度和热区移动速率对晶粒组织材料结构形成过程的影响,为获得形成柱状晶的最佳条件进行研究。 In order to obtain the columnar crystal structure of the metal material, this paper on the grain structure by directional annealing to achieve. In this paper, the phase field method is used to simulate the grain structure evolution in a hot zone with a certain width and uniform temperature by matlab programming. The formation of the grain structure is also studied by the hot zone temperature, hot zone width and hot zone moving velocity Process, to obtain the best conditions for the formation of columnar crystals.