Effects of Welding Heat Input on Microstructure and Electrochemical Behavior of Flux-Cored Arc-Welded Q690 HSLA Steel

Autor:	Kai Wang, Qinghua Lu, Yaoyong Yi, Jianglong Yi, Ben Niu, Zexin Jiang, Jinjun Ma
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Advances in Materials Science and Engineering, Vol 2018 (2018)
Druh dokumentu:	article
ISSN:	1687-8434 1687-8442
DOI:	10.1155/2018/7484025
Popis:	In this work, the weld metal (WM) for the Q690 high-strength low-alloy (HSLA) steel was prepared through flux-cored arc welding (FCAW) at 10 kJ/cm and 20 kJ/cm heat inputs. The effect of welding heat input on the relationship between the microstructural factors and the electrochemical behavior of the FCAW Q690 steel was studied. Due to the fine grain and acicular ferrite affected by the 10 kJ/cm low heat input, the WM presented similar electrochemical behavior to the Q690 base metal, which would minimize the risk of galvanic corrosion. Also, at 20 kJ/cm of high welding heat input, the WM with higher-sized bainite structure was prone to galvanic corrosion risk minimization.
Databáze:	Directory of Open Access Journals
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