Impact Factor:2.2
DOI number:10.1007/s11085-022-10144-0
Affiliation of Author(s):南京工程学院
Teaching and Research Group:0
Journal:High Temperature Corrosion of Materials
Place of Publication:英国
Funded by:江苏省自然科学基金，2020年“双创计划”特别人才引进，江苏省先进结构材料与应用技术重点实验室开放项目，南京工程学院人才引进研究基金
Key Words:Weld metal ；Hot corrosion；Interdendritic ；Austenitic alloy；Oxidation
Abstract:The hot corrosion behavior of the austenitic heat-resistant steel weld metal produced by multi-pass gas tungsten arc welding was investigated. A bilayer oxide scale formed on the surface of the weld metal by the selective oxidation of the element Cr and Fe, and the dissolution of the oxide film occurred at elevated temperatures due to the existence of the molten salt. Morphologies and structures of the oxide scale were characterized by electron microscopy and X-ray diffraction techniques, and then the underlying reason for the hot corrosion of the nonequilibrium weld metal was identified. The interdendritic region could act as the shortcut path for the oxygen, which promotes the internal oxide distribution in chains, and a large internal oxidation zone appears under the bilayer oxide scale.
Note:0
Indexed by:研究论文
Discipline:Engineering
Volume:99
Page Number:117-132
ISSN No.:2731-8400
Translation or Not:no
Date of Publication:2023-01-01