摘要
为评估高炉铜冷却壁工作时的热应力分布,先对铜材料进行高温拉伸试验,获得不同温度下铜的弹性模量,为铜冷却壁热力耦合数值分析提供了基础数据。通过对高炉的整体分析,得到各段铜冷却壁的位移。在此基础上计算自由膨胀时各段联络管的位移,考虑相互连接情况,最终计算得到实际工作时铜冷却壁的温度及应力分布。热膨胀导致铜冷却壁产生的热应力小于材料屈服强度,但挤压造成水管根部平均应力上升会导致疲劳失效。
In order to evaluate the thermal stress distribution of copper staves under working condition, tensile tests under different temperatures were first carried out and the Young＇s modulus in the corresponding temperatures were gained, which povided the basic datas for the thermo-mechanical coupling numerical analysis of blast fuer- nace copper staves. To analysis the whole body of blast furnace, the displacement of every copper stave was gained. Based on the analysis, the displacement of free-expanded water pipes can be caculated, then took linking into con- sideration, finally the temperature and stress distribution under working condition were obtained. The heating expansion created heat stress, it cannot reach the yield strength to cause crack, however, mean stress was elevated .when pipes are linked, which may lead to fatigue failure.
出处
《冶金设备》
2009年第3期45-49,共5页
Metallurgical Equipment
关键词
铜冷却壁
有限元分析
温度场
应力场
Copper stave FEA Temperature distribution Stress distribution
