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H型钢由于自身的结构特点,轧后存在着严重的温度不均、组织不匀和残余应力,有必要对其实施控制冷却。根据传热学和热弹塑性理论,利用有限元分析法对H型钢轧后冷却过程中温度及应力变化进行了数值模拟分析。分析内容包括空冷和控制冷却过程中的温度和应力分布、时间历程及它们在两种工况下的水平差异。研究结果表明,合理的控制冷却方式及工艺参数可以有效地改善空冷状态下的温度不均、组织不匀和残余应力水平较高等问题,获得较均匀的温度场,降低轧件的残余热应力。工作可为H型钢轧后控制冷却措施的实施及其工艺参数的确定提供理论依据和技术支持。
H-beam due to its structural characteristics, there are serious temperature after rolling uneven, uneven microstructure and residual stress, it is necessary to implement controlled cooling. According to the theory of heat transfer and thermo-elasto-plasticity, the finite element analysis was used to simulate the temperature and stress changes during the post-rolling cooling of H-beams. The analysis includes air cooling and controlling the temperature and stress distribution during the cooling process, the time histories, and their level differences between the two operating conditions. The results show that reasonable control of the cooling mode and process parameters can effectively improve the air temperature uneven temperature unevenness and high residual stress levels and other issues to obtain a more uniform temperature field and reduce the residual thermal stress of the rolling. Work can provide theoretical basis and technical support for the implementation of H-beam controlled cooling measures and the determination of process parameters.