论文部分内容阅读
轧后H型钢控制冷却能够改善钢材的组织状态,提高强度,改善钢材的综合力学性能和使用性能。根据实际生产,采用合理的热边界条件,建立了H型钢控制冷却的三维有限元模型。设计了四种控制冷却方案,采用喷雾冷却方式进行冷却。利用有限元软件ANSYS/Multiphysics对H型钢在冷却时的瞬态温度场和应力场进行了数值模拟。通过分析温度场与应力场之间的关系,得出H型钢轧后冷却过程中的断面温差是产生残余热应力的主要原因。
Post-rolling H-beam controlled cooling can improve the organization of steel, improve strength and improve the overall mechanical properties and performance of steel. According to the actual production, the reasonable three-dimensional thermal boundary conditions are used to establish the three-dimensional finite element model of controlled cooling of H-section steel. Four control cooling schemes are designed and cooled by spray cooling. The finite element software ANSYS / Multiphysics was used to simulate the transient temperature field and stress field of H-beam during cooling. By analyzing the relationship between temperature field and stress field, it is concluded that the temperature difference during the cooling process of H-beam is the main cause of residual thermal stress.