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用FEM方法对不均匀温度场三辊楔横轧棒材的轧制过程进行了数值分析,分析了轧后轧件径向截面上温度及等效应变的分布规律,并通过实验研究分析测定了截面上不同位置处的显微组织及力学性能。结果表明:不均匀温度场三辊楔横轧棒材轧后温度场与等效应变在轧件径向截面上成环形分布,且心部温度高变形量小,由心部向外温度逐渐降低变形程度逐渐增大。轧后轧件径向截面上不同位置处组织及性能存在一定的差别。轧件心部为珠光体与先共析铁素体组织,外层边缘为球化渗碳体与铁素体组织。
The numerical simulation of the rolling process of the three-roll cross wedge rolling bar with non-uniform temperature field was carried out by using the FEM method. The distribution of the temperature and the equivalent strain in the radial section of the rolling mill was analyzed and analyzed through experimental analysis Microstructure and Mechanical Properties at Different Positions in Cross Section. The results show that the temperature field and the equivalent strain of the three-roll cross-rolled bar in the inhomogeneous temperature field are distributed in a ring shape in the radial section of the workpiece, and the deformation of the core is high and the temperature is gradually decreased from the outside Degree of deformation gradually increased. There are some differences in the microstructure and properties at different locations on the radial section of the rolled workpiece. Rolling heart Department of pearlite and proeutectoid ferrite organization, the outer edge of the ball of cementite and ferrite organization.