Parker Jonathan, Siefert John
Electric Power Research Institute, Charlotte, NC 28262, USA.
Materials (Basel). 2019 Jul 13;12(14):2257. doi: 10.3390/ma12142257.
Welding is a vital process required in the fabrication of 'fracture critical' components which operate under creep conditions. However, often the procedures used are based on 'least initial cost'. Thus, it is not surprising that in many high energy applications, welds are the weakest link, i.e., damage is first found at welds. In the worst case, weld cracks reported have had catastrophic consequences. Comprehensive Electric Power Research Institute (EPRI) research has identified and quantified the factors affecting the high temperature performance of advanced steels working under creep conditions. This knowledge has then been used to underpin recommendations for improved fabrication and control of creep strength enhanced ferritic steel components. This review paper reports background from this work. The main body of the review summarizes the evidence used to establish a 'well engineered' practice for the manufacture of welds in tempered martensitic steels. Many of these alternative methods can be applied in repair applications without the need for post-weld heat treatment. This seminal work thus offers major benefits to all stakeholders in the global energy sector.
焊接是制造在蠕变条件下运行的“断裂关键”部件所必需的重要工艺。然而，通常所采用的工艺基于“最低初始成本”。因此，在许多高能量应用中，焊缝是最薄弱的环节，即在焊缝处首先发现损坏，这并不奇怪。在最坏的情况下，所报告的焊缝裂纹会产生灾难性后果。电力研究院（EPRI）的全面研究已经识别并量化了影响在蠕变条件下工作的先进钢高温性能的因素。然后，这些知识被用于为改进蠕变强度增强铁素体钢部件的制造和控制提供建议。这篇综述文章报告了这项工作的背景。综述的主体部分总结了用于确立回火马氏体钢焊缝制造“精心设计”做法的证据。这些替代方法中的许多都可应用于修复应用，而无需进行焊后热处理。因此，这项开创性工作为全球能源领域的所有利益相关者带来了重大益处。
