压力容器2024，Vol.41Issue(12)：16-22,7.DOI:10.3969/j.issn.1001-4837.2024.12.003
双金属冶金复合换热管与挠性管板焊接工艺研究
Study on welding technology of bimetal metallurgical composite heat exchange tube and radial tubesheet
摘要
Abstract
To investigate the tube to tubesheet welding technology of bimetal metallurgical composite heat exchange tube that material was SA-213M.T11+SA-213M.TP347H and radial tubesheet that material was 14Cr1Mo,through penetration testing,X-ray testing,macro testing,weld size measurement,microstructure observation,hardness and pull-out load measurement,the welding sequence of the heat exchange tube seal welding+a small amount of wire filling in the first layer+filling+cover was determined.The welding joint was beautiful in shape and stable in quality.The results show that lower region of the joint weld is composed of ferrite+bainite with columnar dendrites and equiaxed crystal,while the upper region of the joint weld is composed of austenite with columnar dendrites crystal.The hardness of the upper part of the joint weld is about 20 HV10 lower than that of the lower part.The research work provides a reference for the selection of welding technology of relational product welding.关键词
双金属复合换热管/挠性管板/焊接工艺Key words
bimetal composite heat exchange tube/radial tubesheet/welding technology分类
机械制造引用本文复制引用
高成龙,李宪爽,赵卫君,刘海,徐兵,徐祥久..双金属冶金复合换热管与挠性管板焊接工艺研究[J].压力容器,2024,41(12):16-22,7.基金项目
国家重点研发计划项目(2023YFB4102304) （2023YFB4102304）
