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针对国内某钢厂42CrMo棒材组织难以控制的问题,通过实测42CrMo棒材的等温转变曲线(TTT),结合相变动力学和热力学的知识提出了相关的组织转变数学模型,进而利用有限元分析软件ANSYS以及提出的数学模型,对42CrMo棒材轧后冷却全过程的温度场及组织转变过程进行了计算机模拟,所得温度场及组织转变模拟结果与实测结果吻合较好,较准确地反映了42CrMo棒材在实际生产中的温度场及组织变化,表明此方法对组织控制及冷却工艺制度的制定具有一定的指导作用,可大大减少试验浪费,经济及环保效益显著。
Aiming at the difficult control of the 42CrMo bar in a steel mill in China, the mathematical model of the transformation of the structure was proposed by measuring the isothermal transformation curve (TTT) of the 42CrMo bar and combining the knowledge of phase change kinetics and thermodynamics. Then the finite element analysis software ANSYS and the proposed mathematical model were used to simulate the temperature field and the transformation process of the entire 42CrMo bar after cooling. The simulation results of temperature field and microstructure transition agree well with the measured results, which accurately reflect the 42CrMo rod The change of temperature field and structure in the actual production shows that this method can guide the organization control and cooling process system formulation, which can greatly reduce the waste of test and bring significant economic and environmental benefits.