EFFECT OF WELDING ON MICROSTRUCTURE AND CORROSION PROPERTIES OF SAF 2507 SUPER-DUPLEX STAINLESS-STEEL JOINTS

被引：0
作者：
Qi, Kai [1 ]
Wu, Mingfang [1 ]
Gu, Jiayang [2 ]
Qiao, Yanxin [1 ]
Li, Ruifeng [1 ]
机构：
[1] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, 2 Mengxi Rd, Zhenjiang 212003, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Marine Equipment & Technol Inst, 2 Mengxi Rd, Zhenjiang 212003, Jiangsu, Peoples R China
来源：
MATERIALI IN TEHNOLOGIJE | 2020年 / 54卷 / 06期
基金：
中国国家自然科学基金;
关键词：
super-duplex stainless steel; welding; elastic property; corrosion; electrochemical; ELECTROCHEMICAL-BEHAVIOR; MECHANICAL-PROPERTIES; PASSIVE FILM; NITROGEN; LASER;
D O I：
10.17222/mit.2019.275
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, SAF 2507 super-duplex stainless steel (SDSS) was welded using laser-beam welding (LBW). laser gas-metal hybrid arc welding (LGH) and gas-tungsten arc welding (GTAW). Heat-input calculation results showed that LBW had the lowest heat input, while GTAW had the highest heat input. The correlation of the heat input during the welding with the microstructure, nanoindentation properties and corrosion behaviors of the three types of welded joints of SAF 2507 SDSS was studied. The hardness of the welded joints decreased as the heat input increased. Microstructural analyses showed that these welded joints were composed of the ferrite phase and austenite phase. and that the fraction of the austenite phase increased with the heat input. Electrochemical studies indicated that the heat input had a minor influence on the corrosion behavior of these joints. A slight increase in the passive-current density and acceptor/donor density in the passive film suggested that the heat input slightly increased the corrosion susceptibility by changing the structure and property of the passive film formed on the surface of the welded joints.
引用
收藏
页码：853 / 859
页数：7
相关论文
共 39 条
[1]   A study on mechanical and microstructure characteristics of the STS304L butt joints using hybrid CO2 laser-gas metal arc welding [J].
Bang, Hee Seon ;
Bang, Han Sur ;
Kim, You Chul ;
Oh, Ik Hyun .
MATERIALS & DESIGN, 2011, 32 (04) :2328-2333
[2]   σ-Phase in Lean Duplex Stainless Steel Sheets [J].
Breda, Marco ;
Pellizzari, Massimo ;
Frigo, Marco .
ACTA METALLURGICA SINICA-ENGLISH LETTERS, 2015, 28 (03) :331-337
[3]   Electrochemical Behavior and Surface Characteristics of Pure Titanium during Corrosion in Simulated Desulfurized Flue Gas Condensates [J].
Cui, Zhongyu ;
Wang, Liwei ;
Zhong, Mingyuan ;
Ge, Feng ;
Gao, Han ;
Man, Cheng ;
Liu, Chao ;
Wang, Xin .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2018, 165 (09) :C542-C561
[4]   Sintered duplex stainless steels from premixes of 316L and 434L powders [J].
Datta, P ;
Upadhyaya, GS .
MATERIALS CHEMISTRY AND PHYSICS, 2001, 67 (1-3) :234-242
[5]   Influence of cold work on pitting corrosion behavior of a high nitrogen stainless steel [J].
Fu, Yao ;
Wu, Xinqiang ;
Han, Enhou ;
Ke, Wei ;
Yang, Ke ;
Jiang, Zhouhua .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2008, 155 (08) :C455-C463
[6]   Effects of nitrogen on the passivation of nickel-free high nitrogen and manganese stainless steels in acidic chloride solutions [J].
Fu, Yao ;
Wu, Xinqiang ;
Han, En-Hou ;
Ke, Wei ;
Yang, Ke ;
Jiang, Zhouhua .
ELECTROCHIMICA ACTA, 2009, 54 (16) :4005-4014
[7]   Analysis of the interface and mechanical properties of field-assisted sintered duplex stainless steels [J].
Garcia-Junceda, Andrea ;
Diaz-Rivera, Coral ;
Gomez-Torralba, Victor ;
Rincon, Maria ;
Campos, Monica ;
Manuel Torralba, Jose .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2019, 740 :410-419
[8]   Effects of nitrogen on the passivity of Fe-20Cr alloy [J].
Ha, HeonYoung ;
Jang, HeeJin ;
Kwon, HyukSang ;
Kim, Sungjoon .
CORROSION SCIENCE, 2009, 51 (01) :48-53
[9]   Effects of solution heat-treatment and nitrogen in shielding gas on the resistance to pitting corrosion of hyper duplex stainless steel welds [J].
Kim, Soon-Tae ;
Jang, Seok-Hwan ;
Lee, In-Sung ;
Park, Yong-Soo .
CORROSION SCIENCE, 2011, 53 (05) :1939-1947
[10]   Investigation of Weld Corrosion Effects on the Stress Behavior of a Welded Joint Pipe Using Numerical Simulations [J].
Kim, Yong-Sang ;
Kim, Jung-Gu .
METALS AND MATERIALS INTERNATIONAL, 2019, 25 (04) :918-929
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