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首页> 外文会议>International Conference on Structural Integrity of Welded Structures >Modeling of Heat Transfer in Pipeline Steel Joint Performed by Submerged Double-Arc Welding Procedure
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Modeling of Heat Transfer in Pipeline Steel Joint Performed by Submerged Double-Arc Welding Procedure

机译：浸没双电弧焊接过程中管线钢接头传热建模

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Submerged arc welding is the most applicable and productive procedure when thick sections have to be welded. Nevertheless, the manufacturers of pressure vessels, pipelines, ships and offshore structures keep on looking for new and modern design solutions of equipments and technologies which should lead to increase of welding process productivity. For instance, the longitudinal welds of pipelines are, mostly, performed by submerged arc welding procedure with multiple arcs and/or multi-wires, such as twin, tandem or twin-tandem, in order to increase the process productivity. However, achievement of optimal mechanical properties of the welded joint should remain the most important quality criteria. It is well known that dependence of the mechanical and metallurgical changes on heat transfer plays a major role in obtaining of safe welded structures and preserving of their structural integrity. That is why the investigation of heat transfer induced by the welding process is required. Furthermore, setting of distance between thermal sources and its influence on the overlapping phenomenon of temperature fields should be explored when submerged double-arc welding procedure is applied. Three dimensional finite element model of butt welded joint - used for simulation of heat transfer in pipeline steel joint performed by submerged double-arc welding process - is developed and described in this paper. Numerical results and a comparative analysis related to the temperature distribution, thermal history, and temperature variation in cross section of the welded joint at different time steps are discussed. Finally, important conclusions regarding the influence of distance between thermal sources on thermal effects and temperature fields overlapping are drawn.
机译：浸没电弧焊接是必须焊接厚部分时最适用和生产的程序。尽管如此，压力容器，管道，船舶和海上结构的制造商继续在寻找新的设备和技术设计解决方案，这应该导致焊接过程生产率的增加。例如，管道的纵向焊缝主要是由具有多个弧和/或多线的浸没的电弧焊接过程进行，例如双，串联或双串联，以提高过程生产率。然而，焊接接头的最佳机械性能的实现应仍然是最重要的质量标准。众所周知，机械和冶金改变对传热变化的依赖性在获得安全焊接结构和保持其结构完整性方面起着重要作用。这就是为什么需要由焊接过程引起的传热调查。此外，应探讨当施加浸没的双电弧焊接过程时，应探索热源之间的距离及其对温度场的重叠现象的影响。三维有限元模型对焊接接头 - 用于模拟浸没双电弧焊接过程管道钢接头中的传热 - 在本文中开发和描述。讨论了与不同时间步骤的焊接接头横截面的温度分布，热历史和温度变化相关的数值结果和对比分析。最后，绘制了关于热源对热效应与温度田距离的影响的重要结论。

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