电焊机2023，Vol.53Issue(12)：28-32,112,6.DOI:10.7512/j.issn.1001-2303.2023.12.04
SA517 Gr.B埋弧自动焊焊接性能研究
Research on SAW Welding Properties of SA517 Gr.B
摘要
Abstract
Mechanical properties and microstructure of SA517 Gr.B welded joint by Submerged Arc Welding(SAW)were analyzed and investigated.The analysis results show that adopting F76A2-EG-M4 welding consumbles,matching proper welding procedure parameters,combined with process treasures of preheat before welding and heating after welding etc.,the mechanical properties of welded joint exhibite excellent;the lowest microhardness is located in heated affected zone(HAZ),it indicates HAZ appears apparent softening phenomenon under the function of welding thermal cycle,which made harden quenching tendency of welded joint isn't obvious;Impact fracture feature of weld and HAZ is shearing fracture mainly,and fracture morphology has a large number of dimples,shear section ratio is 90%and 80%respectively;the main microstruc-ture of weld is fine acicular fettite,and microstructure of HAZ is dominated by tempered sorbite,a larger number of carbide precipitated in HAZ,which results in the decrease of impact properties.关键词
SA517 Gr.B/焊接接头/SAW/力学性能/组织结构Key words
SA517 Gr.B/welded joint/SAW/mechanical properties/microstructure分类
矿业与冶金引用本文复制引用
李娟,张佩瑶,王刚,刘山,丁严广..SA517 Gr.B埋弧自动焊焊接性能研究[J].电焊机,2023,53(12):28-32,112,6.基金项目
山东核电设备制造有限公司科研项目(KY3-2022-03) （KY3-2022-03）
