7N01 铝合金焊接接头腐蚀行为研究进展  

Research Progress on Corrosion of 7N01 Aluminum AlloyWelded Joint

作　　者：魏萍 吴铭方[1] 刘大双 董智慧 WEI Ping;WU Mingfang;LIU Dashuang;DONG Zhihui(School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212100 [2]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《电焊机》2022年第9期10-17,共8页Electric Welding Machine

基　　金：江苏省研究生培养创新工程研究生科研创新计划项目(KYCX21_3450);江苏省自然科学基金面上项目(BK20201453);江苏省高校自然基金重大项目(19KJA460009)。

摘　　要：7N01铝合金在焊接时经历非均匀加热和冷却的过程,焊接接头的局部微观组织发生复杂变化,析出相产生不平衡的溶解及析出行为,并重新分配于界内及晶界,导致焊接接头各区域成分、组织相差较大,从而表现出不同的腐蚀敏感性。时效工艺、焊后处理、焊接工艺参数等一系列因素都会影响7N01铝合金焊接接头的耐蚀性能,同时,服役环境的复杂性也给7N01铝合金腐蚀行为的研究带来极大的挑战。综述7N01铝合金焊接接头的腐蚀类型、腐蚀研究方法、腐蚀发生区域,分析腐蚀机理及腐蚀影响因素,并探讨提升焊接接头耐腐蚀性能的主要途径。7N01 aluminum alloy is a high-strength Al-Zn-Mg alloy with the advantages of heat-treatable strengthening,strong weldability,good processability and light weight.It has been widely used in high-speed trains,marine ships,aerospace and other fields.Since the 7N01 aluminum alloy welded joint has experienced the process of non-uniform heating and cooling,and the local microstructure of the welded joint has undergone complex changes.The precipitated phase has unbalanced dissolution and precipitation behavior,and is redistributed to the boundary and grain boundary,resulting in different components and structures in different regions of the welded joint,thus showing different corrosion sensitivity.A series of factors,such as aging process,post weld treatment and welding process parameters,will affect the corrosion resistance of 7N01 aluminum alloy welded joints.The complexity of service environment also brings great challenges to the research on corrosion behavior of 7N01 aluminum alloy.The corrosion types,research methods and occurrence areas of 7N01 aluminum alloy welded joints are reviewed.Meanwhile,the mechanism and influencing factors of corrosion resistance are analyzed,and the main ways to improve the corrosion resistance of the joints are proposed.

关 键 词：7N01铝合金 焊接接头 腐蚀 研究进展 

分 类 号：TG457.14[金属学及工艺—焊接]