Research on Microstructure and Properties of Welded Joint of 2205 Steel with FCAW

2011 ◽  
Vol 391-392 ◽  
pp. 763-767
Author(s):  
Li Yang ◽  
Na Zhang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Welded Joint ◽  
High Strength ◽  
Two Phase ◽  
Flux Cored Arc Welding ◽  
Mechanical Properties And Corrosion

On the basis of the analysis of composition, microstructure, properties and weldability of 2205 duplex stainless steel, the flux cored arc welding (FCAW) process is made. Then the microstructure, mechanical properties and corrosion resistance of welded joint were analyzed. The results shows using FCAW process, in order to obtain high strength, perfect impact toughness and overall and partial resistance to stress corrosion in welded joint, the Ni content of duplex stainless steel welding material should be 2% to 4% higher than that of base metal, multi-layer and multi-channel welding is adopted with the strict control of energy input less than or equal to 0.926KJ/mm, layer temperature is less than 120 °C, thus the appropriate proportion of two-phase structure in the welded joint can be got. Using a reasonable welding procedure, the microstructure in weld beam is austenite (A) + ferrite (F), and in heat affected zone is ferrite (F) + austenite (A) + a small amount of third phase, the content of austenite in weld beam and heat affected zone is higher than that of the base metal. Tensile strength of the welded joint is up to 854.5MPa and the fracture occurs in the base metal and the heat affected zone. The welded joint has high strength, good plasticity, toughness and corrosion resistance.

Investigation of mechanical and corrosion behavior of laser hybrid weld joint of 2205 duplex stainless steel

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chuanbo Zheng ◽  
Cheng Zhang ◽  
Xiao Yong Wang ◽  
Jie Gu
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Base Metal ◽  
Corrosion Behavior ◽  
Welded Joints ◽  
Two Phase ◽  
Content Type ◽  
2205 Duplex Stainless Steel ◽  
Laser Hybrid

Purpose Duplex stainless steel is composed of equal amounts of austenite and ferrite, which has excellent corrosion resistance and strength. However, after the metal was welded, the ratio of austenite and ferrite in the joint is unbalanced, and secondary phase precipitates are produced, which is also an important cause of pitting corrosion in the joint. Design/methodology/approach This paper aims to study the mechanical and corrosion behavior of welded joints, by adjusting the welding parameters of laser hybrid welding, dual heat sources are used to weld 2205 duplex stainless steel. The two-phase content of different parts of the welded joint is measured to study the influence of the ratio of the two-phase on the mechanical and corrosion properties of the joint. Findings The ratio of austenite and ferrite in different welded joints has an obvious difference, and from top to bottom, the austenite content decreased gradually, and the ferrite content increased gradually. The harmful phases are precipitated in the middle and lower part of the joint. The strength of welded joints is slightly lower than that of base metal. At the same time, the fracture analysis shows that some ferrite phases are affected by the precipitate in the grain and produce quasi-cleavage fracture. The corrosion results show that the corrosion resistance of the welded joints is lower than that of the base metal, and the concentration of chloride ions affects the corrosion resistance. Originality/value In this paper, the authors use the influence of different welding processes on the two-phase ratio of the joint to further study the influence of the microstructure on the corrosion resistance and mechanical properties of the weld.

scholarly journals Effect of Binary Oxide Flux on Weld Shape, Mechanical Properties and Corrosion Resistance of 2205 Duplex Stainless Steel Welds

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ibrahim Albaijan ◽  
Abdeljlil Chihaoui Hedhibi ◽  
Kamel Touileb ◽  
Rachid Djoudjou ◽  
Abousoufiane Ouis ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
High Strength ◽  
Weld Bead ◽  
Inert Gas ◽  
Weld Shape ◽  
Steel Welds ◽  
Mechanical Properties And Corrosion ◽  
Oxide Flux

Duplex stainless steel (DSSs) is characterized by excellent corrosion resistance with high strength. Twelve single-component fluxes (TiO2, Fe2O3, Cr2O3, ZnO, ZrO2, CaO, Mn2O3, V2O5, MoO3, SrO, MgO, and LaO2) were tested in the initial experiment using activated Tungsten inert gas (ATIG) technic, and then three couples of oxides were selected as binary fluxes (Fe2O3-Cr2O3, ZnO-Mn2O3, and V2O5-Mn2O3) for the rest of the study. The results show that the depth weld of binary oxides (Fe2O3-Cr2O3, ZnO-Mn2O3) was increased by 3.7 times in comparison with tungsten inert gas (TIG) weld bead. The hardness and the tensile strength of welds carried out with Fe2O3-Cr2O3 and ZnO-Mn2O3 binary fluxes were close to those of the parent metal. Weld bead executed with ZnO-Mn2O3 oxides has more capability to withstand sudden loads. Potentiodynamic polarization tests were performed. The metal welded with flux composed of Fe2O3-Cr2O3 has been found the most resistant to corrosion.

UNILOY 326

Alloy Digest ◽  
1970 ◽  
Vol 19 (7) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Distinct Advantage ◽  
Two Phase ◽  
Stress Corrosion Resistance

Abstract UNILOY 326 is a two-phase, ferromagnetic stainless steel characterized by high strength and very good general and stress corrosion resistance. It has distinct advantage for the fastener industry. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-241. Producer or source: Cyclops.

Effect of Thermal Cycle on Microstructure and Corrosion Behavior of Duplex Stainless Steel SAF 2205 Electron Beam Welded Joint

2018 ◽  
Vol 786 ◽  
pp. 119-127
Author(s):  
Sameh M. Khafagy ◽  
Morsy Amin Morsy ◽  
H.M. El Sherbini ◽  
Y.F. Barakat
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Thermal Cycle ◽  
Welded Joint ◽  
Volume Fraction ◽  
Holding Time ◽  
Σ Phase ◽  
Phase Volume Fraction ◽  
Saf 2205

It is known that heat treatment (HT) highly affects the properties of base metal (BM) and fusion zones (FZ) of duplex stainless steel (DSS). In fact, it may give unwanted structure changes. Duplex stainless steels SAF 2205 welded joint was subjected to thermal cycle at temperature of 850◦C at holding times 1, 3, 5 and 7 hours. The influence of heating cycles and concentration of corrosive medium on the corrosion properties and microstructure of 2205 alloy was the objective of this work. It was found that process led to noticeable decrease in the corrosion resistance of BM and FZ specimens; moreover the decrease was large in BM than FZ. It was also found that sigma phase (σ) precipitated in the different zones of the structure. σ phase volume fraction was found to increase with increasing the holding time of HT, and its increase is larger in BM. Corrosion resistance was found to be oppositely related to σ phase formation. Secondary austenite phase (γ2) was also precipitated and its volume fraction in FZ was found to increase with increasing the holding time of HT and decreased in BM.

Effect of Ag Doping in 2205 Duplex Stainless Steel on Corrosion Resistance

2011 ◽  
Vol 110-116 ◽  
pp. 1207-1212 ◽  
Author(s):  
Dong Yih Lin ◽  
Sheng Min Yang ◽  
Yong Chih Chou ◽  
Yi Ya Fang ◽  
Huei Sen Wang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Biomedical Application ◽  
High Strength ◽  
Ferrite Phase ◽  
Test Material ◽  
Food Industries ◽  
2205 Duplex Stainless Steel ◽  
Ag Particles

Anti-bacterial property is a major concern of material use in many areas, such as food industries, hospitals, and kitchenware. It is well known that Ag owns the ability to destroy the cell walls and cell membranes of bacteria to inhibit their breeding. Therefore, Ag implanted on the material surfaces is a popular process in biomedical application. Once the implanted layer is destroyed, the well-effective antibacterial property is also ceased. In order to improve the effectiveness of bacterial characteristics, adding Ag in 2205 duplex stainless steel can maintain the bacterial property for a long period of time than Ag-implanted process. 2205 duplex stainless steel possesses excellent corrosion resistance, high strength, and superior workability, owing to possess both austenite and ferrite phase. Among them, 2205 duplex stainless steel was adopted as the test material, doping various Ag contents in this study. The result reveals that Ag content increased with ferrite phase fraction increasing. It showed Ag is the stabilizer of ferrite. In addition, the solubility of Ag into Fe was extremely low and Ag particles were distributed randomly. However, polarization test was carried out to investigate the ability of corrosion resistance. The test result showed adding Ag in 2205 duplex stainless steel had obvious contribution to decrease its corrosion resistance.

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