耐热钢焊接温度场的有限元模拟
Finite Element Simulation of Welding Temperature Field of Heat-resistant Steel
王 庆， 姜运建， 代 真
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作者单位：河北省电力研究院， 河北 石家庄 050021
中文关键字：P92管道； 焊接温度场； 有限元模拟； Ⅳ型裂纹
英文关键字：P92 pipe; welding temperature field; finite element simulation; type Ⅳcracking
中文摘要：基于大型有限元软件ABAQUS，对耐热钢焊接接头的温度场进行了数值模拟。计算中考虑材料物理性能随温度的变化，并运用单元激活技术模拟多道焊焊接过程。结果表明，所建立的模型可以较准确的模拟耐热钢焊接温度场。针对Cr-Mo耐热钢易于在热影响区产生Ⅳ型裂纹的现象，对热影响区的温度场进行了分析，并运用试验数据对热影响区的模拟结果进行了验证。
英文摘要：Temperature field of welded joint of heat-resistant steel was simulated by ABAQUS code. The change of material property depending on temperature was considered in computation. The element birth technique was adopted to simulate multi-pass weld. The results indicate that the method can accurately simulate temperature field of welded joint of heat-resistant steel. Aimed at type IV failure taking place in HAZ of Cr-Mo heat-resistant steel, the temperature field of HAZ is discussed and the experimental datas are used to verify the simulating results of HAZ.