摘要
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。
Due to the characteristics of H-Beam, temperature and microstructure are not uniform after finish rolling, which results in high residual stress. It is essential to carry out controlled cooling. According to heat transfer and thermo-elastic-plastic theory, together with finite element method, the temperature and thermal stress of H-Beam during cooling are numerically simulated, including their distribution, time history and differences during air cooling and spray cooling. It is found that appropriate cooling mode and parameters can improve the situation effectively, acquiring fair uniform temperature field and lower residual stress. It is helpful for practice use.
出处
《冶金设备》
2008年第1期17-20,28,共5页
Metallurgical Equipment
关键词
H型钢
控制冷却
温度
热应力元
H-Beam Controlled cooling Temperature Thermal stress
作者简介
刘巧，女，1983年出生，毕业于北京科技大学机械装备及控制专业，硕士研究生
