摘要
实际生产过程中,补焊过程往往对焊接接头的可靠性产生影响。研究了补焊对7N01-T5/7N01-T4异种铝合金腐蚀性能的影响。结果表明,补焊会导致焊接接头耐蚀性降低,特别是热影响区域。焊接接头腐蚀性能演变主要与补焊过程中Zn元素从基体向晶界处的扩散有关。
Mandatory repair welding for production of structural parts easily causes problems to the reliability of welded joints due to the resultant extra thermal cycle.The evolution of corrosion resistance of repair welded joint of 7 N01 aluminum alloy in T5 and T4 state through metal inert gas(MIG)welding process was investigated.The results reveal that repair welding deteriorates the corrosion resistance of weldment,especially of the heat-affected zone.The main reason for the change in corrosion resistance of repair weldment is related to the transformation of precipitates and the diffusion of Zn from the matrix to grain boundaries caused by the extra thermal cycles.
作者
李帅
刘中英
王星星
毛丰
夏月庆
纠永涛
上官林建
龙伟民
Li Shuai;Liu Zhongying;Wang Xingxing;Mao Feng;Xia Yueqing;Jiu Yongtao;Shangguan Linjian;Long Weimin(School of Mechanical Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,Henan University of Science and Technology,Luoyang 471003,China;State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou Research Institute of Mechanical Engineering,Zhengzhou 450001,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2021年第3期762-768,共7页
Rare Metal Materials and Engineering
基金
Research Foundation for High-Level Talent Scholars in North China University of Water Resources and Electric Power(201811034)
Open Fund of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials(HKDNM2019020)
National Natural Science Foundation of China(51705151)
China Postdoctoral Science Foundation(2019M662011)
Open Fund of State Key Laboratory of Advanced Brazing Filler Metals and Technology(SKLABFMT201901)
Key Technology Needs of Henan Province Unveiled and Solved Project(191110111000)。
关键词
MIG焊
补焊
7N01铝合金
腐蚀行为
热影响区
热循环
MIG welding
repair welding
7N01 aluminum alloy
corrosion behavior
heat-affected zone
thermal cycles
