电焊机2017，Vol.47Issue(3)：17-21,31,6.DOI:10.7512/j.issn.1001-2303.2017.03.03
基于埋弧焊的EQ51海工钢接头组织调控研究
Research on microstructure controlling of welded joint with offshore steel EQ51 based on SAW
张楠 1张熹 2许静 1杨建炜1
作者信息
- 1. 首钢技术研究院,北京100043
- 2. 北京市能源用钢工程技术研究中心,北京100043
- 折叠
摘要
Abstract
The welding mechanical properties of high-efficiency welding on offshore steel EQ51 with thickness of 12 mm were investigated for improving the welding structure security in this paper.The microstructure and sub structure in four areas marked HF,CGHAZ,ICGHAZ and SCGHAZ were analyzed by SEM and EBSD.The results show that the higher component of C-Mn in base metal and penetration ratio are the primary causes which make the toughness decreased.Though graded composition design from decreasing C-Mn,decreasing Ni,to increasing Mo,the ideal microstructure is obtained,which makes the M/A precipitates depressed in HAZ.The average impact energy in fusion-line can be raised from 14 J to 62 J,which is sufficient the deadline of 33 J.关键词
焊接/再热粗晶区/临界再热粗晶区/不完全重结晶区/大角度晶界Key words
welding/CGHAZ/ICGHAZ/SCGHAZ/high angle boundary分类
矿业与冶金引用本文复制引用
张楠,张熹,许静,杨建炜..基于埋弧焊的EQ51海工钢接头组织调控研究[J].电焊机,2017,47(3):17-21,31,6.
