Evaluation of hybrid welding of pipelines and joint integrity

管道复合焊及接头完整性评估

• 批准号: 543942-2019
• 负责人: Gerlich, Adrian
• 金额: $ 3.17万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=688754
• 关键词: Evaluation; hybrid; welding; pipelines; joint

The proposed collaborative project, "Evaluation of hybrid welding of pipelines and joint integrity" involving the University of Waterloo (UW), and TC Energy Corp. (TCE) will promote the adoption of high performance hybrid arc and laser welding processes for energy infrastructure including pipelines, and help to identify material properties that avoid fracture in welds. The knowledge generated will provide welding performance data and specifications that can be used by TCE and their suppliers involved with other large infrastructure. The application of new advanced welding technology relies on evaluating their performance and comparing this to existing benchmarks such as current semi-automatic arc welding. Utilizing these new processes will promote the competitiveness of welding companies within Canada, and strengthen the status of advanced manufacturing. While evaluating joint mechanical properties, the project will also focus on developing more reliable criteria for predicting when fracture occurs at a weld under extreme loading conditions. Although welds are designed to reach a minimum stress and deformation to avoid fracture in the field, newer high strength linepipe steels may undergo softening after welding. This can limit their deformation in service, and can limit the strength of steels that can be used. By preforming tensile testing of joints with a wide range of properties, the mechanical properties that avoid premature fracture will be determined, and thus guide the development of more robust welding procedures and selection of materials in the future.

滑铁卢大学(UW)和TC Energy Corp.(TCE)拟议的合作项目“管道混合焊接和接头完整性评估”将促进包括管道在内的能源基础设施采用高性能的混合弧焊和激光焊接工艺，并帮助确定避免焊缝断裂的材料特性。产生的知识将提供焊接性能数据和规范，可供TCE及其参与其他大型基础设施的供应商使用。新的先进焊接技术的应用依赖于对其性能的评估，并将其与现有的基准(如当前的半自动弧焊)进行比较。使用这些新工艺将提升加拿大焊接公司的竞争力，并加强先进制造的地位。在评估接头机械性能的同时，该项目还将专注于开发更可靠的标准，以预测在极端载荷条件下焊缝何时发生断裂。虽然焊缝被设计成达到最小的应力和变形，以避免现场断裂，但较新的高强度管线钢在焊接后可能会软化。这可以限制它们在使用中的变形，并可以限制可以使用的钢材的强度。通过对具有多种性能的接头进行预拉伸试验，将确定避免过早断裂的力学性能，从而指导未来更坚固的焊接工艺和材料的选择。