2A14铝合金构件淬火过程的数值模拟及试验验证

Numerical simulation and experimental verification for quenching process of 2A14 aluminum alloy components

为了预测2A14铝合金大型构件淬火后的残余应力与变形,采用热膨胀试验、高温拉伸试验和材料计算方法,建立了2A14铝合金淬火过程材料模型。基于在线测量2A14铝合金淬火过程的温度变化数据和XRD测量淬火后的残余应力数值,通过反传热法计算了C形环试样淬火过程的表面换热系数,并通过模拟计算了C形环试样淬火过程的温度、应力和开口距离变化。结果表明,淬火后C形环开口距离增加量的仿真计算结果为0.1158 mm,实际测量结果为0.1657 mm。仿真计算结果与实测结果吻合。

In order to predict the residual stress and deformation of 2A14 aluminum alloy after quenching,a material model of the 2A14 aluminum alloy during quenching was established with thermal expansion test,high temperature tensile test and material computation method.Based on the on⁃line measured temperature change during quenching process and the residual stress value after quenching measured by XRD,the surface heat transfer coefficient of the C⁃ring specimen during quenching was calculated by inverse heat transfer method,and the changes of the temperature,stress and opening distance of the C⁃ring during quenching process were simulated and calculated.The simulation results shows that the increase of the opening distance of the C⁃ring after quenching is 0.1158 mm,and the actual measurement is 0.1657 mm,which show that the calculated results are in good agreement with the measured results.