大长径比零件高压气淬温度场数值模拟

针对大长径比零件淬火均匀性和变形控制这一难点问题,采用数值模拟方法研究高压气淬技术对大长径比零件温度场的影响规律。结果表明,气体的淬火压力越大、流速越快、换热能力越强,工件冷却速度越快。采用上下交替吹风的静态交变流型不会对工件的冷速产生明显影响,但有利于改善温度场均匀性,且上下交替吹风时间间隔越短,工件的温度场越均匀。

Numerical simulation of temperature field of parts with large aspect ratio during high pressure gas quenching process

Aiming at the problem of quenching uniformity and deformation control of large aspect ratio parts, it was studied by numerical simulation that how it works on the temperature field of large aspect ratio parts during high pressure gas quenching process. The results show that the higher the quenching pressure, the faster the flow rate and the stronger the heat transfer capacity, the faster the cooling speed of the workpiece. The static alternating flow pattern with up-down alternating blowing has no obvious effect on cooling rate of the workpiece, but it is beneficial to improve the temperature uniformity. The shorter the interval between up-down alternating blowing, the more uniform the temperature field of the workpiece.