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异种钢接头的早期失效多发生在垂直管接头轴线方向的焊缝界面上，究其本质是由于在熔合线区碳化物相／基体界面上优先产生了蠕变孔洞，而该蠕变孔洞的形成与其所处区域的应力状态密切相关．本文用有限元法分析了钢１０２／Ｉｎｃｏｎｅｌ８２／ＴＰ３４７Ｈ异种钢接头在工况温度６００℃下，坡口角度的不同对焊缝界面热应力的影响，并对不同坡口形式的焊态残余应力作了实测，提出适度大的坡口角以及改良型坡口接头可提高异种钢接头高温使用性能的观点．
The early failure of dissimilar steel joints occurred in the weld joint along the axis of the vertical pipe joint. The essence of the dissimilar steel joints was that creep holes were preferentially formed on the carbide / matrix interface in the fusion zone, and the formation of the creep holes It is closely related to the stress state in the area where it is located. In this paper, the finite element method was used to analyze the influence of different groove angles on the thermal stress at the weld interface of steel 102 / Inconel82 / TP347H dissimilar steel joints at the working temperature of 600 ℃. The weld residual stress in different groove forms The actual measurement, put forward a moderately large bevel angle and improved bevel joints can improve the dissimilar steel joints high temperature performance point of view.