超临界锅炉机组过热器用Super304H钢管道TIG焊接有限元分析
Finite Element Analysis of TIG Welding for Super304H Steel Pipe Based on ANSYS
周兴美1， 陈 南2， 蒋 渝1
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作者单位：（1.四川大学 材料科学与工程学院，四川 成都 610065； 2.伊顿（中国）投资有限公司成都办事处，四川 成都 610016）
中文关键字：Super304H钢管；数值模拟；温度场；残余应力
英文关键字：Super304H steel pipe; numerical simulation; temperature field; residual stress
中文摘要：基于 ANSYS 软件平台，建立了Super304H钢管道TIG焊接的有限元数值分析模型。采用单元生死的热源模式进行加载，获得了焊接温度场分布规律。利用温度-应力间接耦合的方法计算了焊接残余应力场。结果表明：在焊缝及附近区域，管道外表面的环向和轴向残余应力均为压应力，管道内表面为较大的残余拉应力。在焊趾处，管道内表面的环向残余应力最大值约260 MPa，轴向残余最大值约230 MPa。
英文摘要：Based on ANSYS software, FEM analysis model for TIG welding of Super304H steel pipe was established. The method of element birth and death was applied to simulate the model of loading welding heat source. The distribution regulation of temperature field was obtained. With the method of thermal-structure indirect coupling, the residual stress field was calculted. The results show that the residual stress of the outer wall is compression stress and the residual stress of the inner wall is tensile stress near the weld. The maximum hoop residual stress of the inner wall is 260 MPa and the axial residual stress is 230 MPa in the weld toe.