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建立了有限元-有限体积耦合的热处理流场、温度场、组织场、应力场数值模型,并采用真空高压气淬工艺对该模型进行了验证。模拟结果与实测不同位置的冷却曲线和显微组织吻合较好。本研究扩展了热处理模拟的求解域,克服了传统淬火模拟需预先获得淬火介质换热系数的局限。模拟可获得工件热处理后的显微组织分布和残余应力分布,进而为热处理工艺的制定提供参考。
The finite element-finite volume coupling heat flow field, temperature field, field and stress field numerical model were established. The model was verified by vacuum high-pressure gas quenching process. The simulation results agree well with the measured cooling curves and microstructures at different locations. This study extends the domain of heat treatment simulation to overcome the limitations of the traditional quenching simulation in advance to obtain the quenching medium heat transfer coefficient. Simulation can be obtained after the workpiece heat treatment of the distribution of microstructures and residual stress distribution, and then provide a reference for the development of heat treatment process.