Measurement of residual stresses induced by sequential weld buttering and cladding operations involving a 2.25Cr-1Mo substrate material
Measurement of residual stresses induced by sequential weld buttering and cladding operations involving a 2.25Cr-1Mo substrate material
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DOI：
10.1016/j.ijpvp.2017.06.003
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发表时间：
2017-07-01
影响因子：
3
通讯作者：
Francis, J. A.
中科院分区：
文献类型：
--
作者：
Javadi, Y.;Walsh, J. N.;Francis, J. A.
在高压海底系统以及必须将锻造部件焊接到管道的情况下，异种金属焊接是必要的。F22（2.25Cr - 1Mo）钢常用于此类锻造钢部件，由于这种钢未经焊后热处理（PWHT）不能投入使用，部件通常通过施加堆焊层为现场焊接做准备。此外，为了减轻腐蚀会沉积一层堆焊层。多种焊接任务和异种材料的这种组合导致产生大量残余应力的可能性。本研究旨在深入了解焊接操作各个阶段残余应力的演变。使用轮廓法测量残余应力以及增量中心孔钻孔法对实验室规模的焊接模型进行了评估。研究发现，堆焊和熔覆都会引入接近屈服水平的拉伸残余应力，但这些应力在焊后热处理时成功消除。（C）2017作者。由爱思唯尔有限公司出版。
Dissimilar metal welds are necessary in high-pressure subsea systems and in cases where forged components must be welded to pipelines. F22 (2.25Cr-1Mo) steel is often used in such forged steel components and, since this steel cannot enter service without undergoing post-weld heat treatment (PWHT), the components are usually prepared for field welds through the application of a buttering layer. Furthermore, a weld overlay is deposited for the purpose of mitigating corrosion. This combination of multiple welding tasks and dissimilar materials leads to the possibility of developing substantial residual stresses. This study aims to provide insights to the evolution of residual stresses at each stage of the welding operation. The assessment has been undertaken on laboratory-scale weld mock-ups using the contour method for residual stress measurement, and incremental centre hole drilling. It was found that both buttering and cladding introduce near-yield levels of tensile residual stresses, but that these stresses are successfully relieved upon PWHT. (C) 2017 The Authors. Published by Elsevier Ltd.