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Experimental analysis of dissimilar metal weld joint: Ferritic to austenitic stainless steel

机译:异种金属焊接接头的实验分析:铁素体至奥氏体不锈钢

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摘要

The dissimilar metal weld (DMW) joint between SA508Gr.3Cl.1 ferritic steel and SS304LN using Inconel 82/182 consumables was required in the nuclear power plants. The joint integrity assessment of these welds requires mechanical and metallurgical properties evaluation in weldment regions. The joint was subjected to 100% radiography test and bend test and transverse tensile test. Welding and testing were carried out as per the requirements of ASME Sec-IX and acceptance criteria as per ASME Sec-Ⅲ. The transverse tensile test results indicated the failure from the weld metal although it satisfies the minimum strength requirement of the ASME requirements; therefore, the DMW joint was analyzed in detail. Straight bead deposition technique, fine slag inclusion, less reliable radiograph technique, plastic instability stress, yield strength ratio and metallurgical deteriorations have been contributed to failure of the DMW joint from the weld region. In the present work, the factors contributing to the fracture from weld metal have been discussed and analyzed.
机译:核电厂需要SA508Gr.3Cl.1铁素体钢和SS304LN之间使用Inconel 82/182易损件进行异种金属焊接(DMW)接头。这些焊缝的接头完整性评估要求在焊件区域进行机械和冶金性能评估。对接头进行100%射线照相测试,弯曲测试和横向拉伸测试。焊接和测试按照ASME Sec-IX的要求和验收标准按照ASMESec-Ⅲ进行。横向拉伸试验结果表明,尽管焊缝金属满足ASME要求的最低强度要求,但仍会导致焊缝失效。因此,对DMW接头进行了详细分析。直焊道沉积技术,夹杂细渣,射线照相技术不可靠,塑性不稳定应力,屈服强度比和冶金学劣化已导致DMW接头从焊接区域的失效。在目前的工作中,已经讨论和分析了造成焊接金属断裂的因素。

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