摘要
Abstract
Stainless Steel Electron Beam Welding is often considered the optimal upgrade for manual GTAW welding.How-ever,in some welding structures with shear strength requirements,the narrow characteristics of electron beam welds may af-fect their load-bearing performance.Since the welds of nuclear fuel cylinder components need to withstand long-term high temperature and pressure,radiation creep stress,and chemical corrosion in the reactor core,the shear load-bearing perfor-mance of electron beam welds has been questioned by experts.To ensure the reliability of the core product welding struc-ture,the geometric dimensions and load-bearing area of electron beam(EB)welds and manual GTAW welds were first com-pared and analyzed,and it was found that the width of EB welds is only 53.5%of GTAW welds,and the load-bearing area is only 48.8%of GTAW welds.Then,through theoretical calculation and working condition analysis,it was concluded that the maximum load-bearing capacity of the cylinder component weld is 134,765 N,and the theoretical load-bearing capacity of both EB and GTAW welds is much greater than this value.Finally,through physical testing,it was found that the load-bearing performance of EB and GTAW welds is equivalent and both are greater than the load-bearing capacity of the cylin-der component itself.It was ultimately proven that the EB welds can meet the design requirements for product load-bearing performance under normal and accident conditions,providing support for the smooth advancement of research on the local-ization of nuclear fuel.关键词
核燃料/筒体部件/焊接结构/低钴奥氏体不锈钢/焊缝承载性能Key words
nuclear fuel/upper shell/welded structure/low-cobalt austenitic stainless steel/weld load-bearing performance分类
矿业与冶金
