期刊
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
卷 154, 期 -, 页码 58-74出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpvp.2017.06.003
关键词
Nozzle-to-pipe weld; Offshore welding; Safe-end weld; Subsea installations; Weld modelling; Weld overlay
资金
- BP through BP International Centre for Advanced Materials (BP-ICAM)
- EPSRC through Centre for Doctoral Training in Materials for Demanding Environments [EP/L01680X/1]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据