H型钢轧后冷却对热应力的影响  

Effects of Cooling After Rolling on Thermal Stress of H-beam Steel

作　　者：马劲红[1] 姚晓晗 陶彬[1] 李硕[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北唐山063009

出　　处：《热加工工艺》2014年第13期121-123,共3页Hot Working Technology

摘　　要：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。Controlled cooling of H-beam steel after rolling can change the microstmcture, increase strength and improve the comprehensive mechanical properties and service performance. According to the actual production, three dimensional FE model of controlled cooling of H-beam steel was established by adopting the rational thermal boundary condition. The four kinds of cooling schemes were designed. Spray cooling was used. Transient temperature field and stress field were simulated by using the FE software ANSYS/Multiphysics. Through analyzing the relationship between the temperature field and stress field, it was obtained that the main reasons for producing residual thermal stress are the section temperature difference in the cooling process of H-beam steel after rolling.

关 键 词：H型钢 控制冷却 断面温差 热应力 

分 类 号：TG335.4[金属学及工艺—金属压力加工]