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采用有限元软件对高温合金Inconel690(IN690)高温高速热挤压工艺进行了数值分析,获得了不同工艺条件下变形材料内部的温度场、应变场、应力场、挤压力的变化规律。结果表明,随着挤压速度增加,变形的不均匀性增大,坯料的温度升高明显;随着变形温度升高,最大等效应力明显减小,其分布也趋于均匀化,使塑性提高。挤压力随着挤压速度的增大呈先减小后增大的趋势,随着挤压温度的增大而减小。数值模拟结果与试验结果的相对误差小于7.3%。IN690合金合理的挤压工艺参数是挤压速度为110～120mm/s,挤压温度为1200℃。
The finite element method was used to analyze the high temperature and high speed hot extrusion process of superalloy Inconel690 (IN690). The variation law of temperature field, strain field, stress field and squeezing force under different process conditions was obtained. The results show that as the extrusion speed increases, the deformation inhomogeneity increases, and the temperature of the billet increases obviously. With the increase of the deformation temperature, the maximum equivalent stress decreases obviously and its distribution tends to be uniform. The plasticity improve. The extrusion pressure decreases first and then increases with the increase of extrusion speed, and decreases with the increase of extrusion temperature. The relative error between numerical simulation and experimental results is less than 7.3%. Reasonable extrusion process parameters IN690 alloy extrusion speed is 110 ~ 120mm / s, extrusion temperature is 1200 ℃.