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首页> 外文会议>International Conference on Global Trends in Joining, Cutting and Surfacing Technology >Development of Welding Procedure For Joining Dissimilar Metal Pipes with Inconel as Filler Material For Nuclear Engineering Applications
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Development of Welding Procedure For Joining Dissimilar Metal Pipes with Inconel as Filler Material For Nuclear Engineering Applications

机译：焊接过程的开发与核电工程应用中的填充材料相连的焊接程序

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Bhabha Atomic Research Centre (BARC) is developing an Advanced Heavy Water Reactor (AHWR) for utilization of Thorium as its fuel. The proposed PHT system for the reactor has dissimilar metal joint of SS 316LN to High Strength Low Alloy Steel (HSLA) SA 508 Gr.3 combinations and development of a welding procedure, meeting the stringent requirements for joining the given dissimilar material combination is essential. Among the various options of selecting weld filler materials, Inconel-82/182 is one of the AWS recommended filler materials for such high temperature applications. To design the dissimilar welds of said combination and evaluate the integrity of weld joints by tensile and fracture property studies, a welding procedure for joining dissimilar metal pipe weld specimens were qualified by CDM. Gas Tungsten Arc Welding (GTAW) technique, using Inconel-82 as filler wire, was adopted for buttering on Low Alloy Steel interface and for root pass. Shielded Metal Arc Welding (SMAW) technique, using Inconel-182 as filler electrode, was adopted for subsequent welding. But the development of such a process has revealed the persistent problems of cracking risk at austenitic to ferritic fusion line. The primary causes of cracking are thermal fatigue or hydrogen embritlement cracking at hard zones along the fusion line. This paper disseminate experiences gathered on developing the welding procedure and techniques employed to overcome the difficulties faced while welding the dissimilar material of SS 316LN to Low Alloy Steel SA508 Gr.3.
机译：Bhabha原子研究中心（BARC）正在开发一种先进的重水反应器（AHWR），以利用钍作为其燃料。用于反应器的所提出的PHT系统具有SS 316LN的不同金属接头，高强度低合金钢（HSLA）SA 508 GR.3组合和开发焊接程序，满足加入给定不同材料组合的严格要求是必不可少的。在选择焊接填充材料的各种选择中，Inconel-82/182是用于这种高温应用的AWS推荐的填充材料之一。为了设计所述组合的不同焊缝，并通过拉伸和裂缝性能研究评估焊接接头的完整性，加入不同金属管焊接样品的焊接过程得到CDM。使用Inconel-82作为填充丝的气体钨弧焊（GTAW）技术用于低合金钢界面和根通过。采用屏蔽金属电弧焊接（SMAW）技术，用于随后焊接使用Inconel-182作为填充电极。但是这种过程的发展揭示了奥氏体对铁素体融合线裂解风险的持续存在问题。裂缝的主要原因是沿融合线的硬区的热疲劳或氢腹部裂缝。本文传播在开发焊接程序和用于克服SS 316LN的不同材料的焊接程序和技术上采用的焊接程序和技术的经验传播。

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