Brazing of CP-Titanium / CP-Titanium and Titanium Alloy / Stainless Steel with Laminated Ti-Based Filler Metal

2007 ◽  
Vol 539-543 ◽  
pp. 4031-4035 ◽  
Author(s):  
Y. Miyazawa ◽  
C.S. Chang ◽  
H. Sato ◽  
Jun Suda ◽  
T. Hiraoka ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Stainless Steel ◽  
Titanium Alloy ◽  
Base Metal ◽  
Filler Metal ◽  
Eutectoid Reaction ◽  
Chemical Compositions ◽  
Low Oxygen ◽  
Continuous Type ◽  
Cp Ti

Joining technology of CP-Titanium and Titanium alloy is very important for manufacturing field. In that case of titanium brazing, chemical compositions of brazing filler metal and brazing atmosphere are very important. In this study, CP-Ti/CP-Ti and Ti alloy/Stainless Steel were brazed with Ti-based laminated brazing filler metal by using continuous type furnace under Ar gas atmosphere containing extremely low oxygen. Laminated filler was fabricated by roll bonding technology. Chemical compositions of laminated filler metal used in this study were Ti-15Cu-15Ni and Ti-20Zr-20Cu-20Ni. Brazing temperature employed in this study was 850, 900, 950, and 1000 C. These brazing temperatures were based on thermal analysis results and alpha-beta transformation temperature of the base metal used in this study. Firstly melting properties of laminated brazing filler metal was investigated with DTA and DSC. Secondary joint characteristics were estimated by micro-structural observation at the joint and mechanical properties measurement. Sound joint was obtained in this study according to outside appearance of the specimen. Ti-20Zr-20Cu-20Ni filler had low melting point as compared with Ti-15Cu-15Ni according to thermal analysis results and fillet form-ability. Ni and Cu were diffused from molten brazing filler to base metal during brazing and Ti-Cu-Ni eutectoid reaction was took placed at the based metal during cooling after brazing.

Overlay Welding on Titanium and 304 Stainless Steel Using ERNiCu-7 Filler Metal by GTAW Process

2017 ◽  
Vol 728 ◽  
pp. 60-65
Author(s):  
Thanaporn Thonondaeng ◽  
Ghit Laungsopapun ◽  
Kittichai Fakpan ◽  
Krittee Eidhed
Keyword(s):  
Stainless Steel ◽  
Base Metal ◽  
Filler Metal ◽  
Welding Current ◽  
304 Stainless Steel ◽  
Depth Of Penetration ◽  
Bead Width ◽  
Gtaw Process ◽  
Overlay Welding ◽  
Cp Ti

Single pass overlay welding of the ERNiCu-7 filler metal on the commercial pure titanium grade 2 and the 304 stainless steel using the gas tungsten arc welding (GTAW) process was studied. The ERNiCu-7 filler metal was overlay welded on the base metals with varying welding currents; it was 30A, 40A and 50A for the CP-Ti base metal and 50A, 60A and 70A for the 304SS base metal. The experimental results showed that the overlay CP-Ti welded-specimen, increasing of welding current increased bead width and decreased depth of penetration of weldment. While for the 304SS welded-specimen, increasing of welding current increased both bead width and depth of penetration. Suitable heat inputs to achieve good geometry of weldment for overlay welding were 348J/mm for CP-Ti welded-specimen and 558J/mm for 304SS welded-specimen.

Corrosion Resistance Evaluation of a Stainless-Steel Brazed Joint in HCl Solution

2021 ◽  
Vol 1016 ◽  
pp. 997-1002
Author(s):  
Hikaru Nagata ◽  
Masa Ono ◽  
Yasuyuki Miyazawa ◽  
Yuji Hayashi ◽  
Yoshio Bizen
Keyword(s):  
Aqueous Solution ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Base Metal ◽  
Corrosion Behavior ◽  
Anodic Polarization ◽  
Filler Metal ◽  
Brazed Joint ◽  
In Situ Observations

To clarify the effect of the acid solution type on corrosion resistance, the corrosion behavior of stainless steel brazed joints in HCl aqueous solution was evaluated through electrochemical measurements. Anodic polarization curves of a ferritic stainless-steel base metal, Ni-based brazing filler metals, and a brazed joint were recorded. In addition, in situ observations were conducted to observe the corrosion behavior of each structure of the brazed joint. Corrosion potentials of the brazing filler metal were lower than that of the base metal. In situ observations of the brazed joint revealed the order of corrosion in aqueous hydrochloric acid. According to the electrochemical measurements, under an actual corrosive environment, the brazing filler metal can function as an anode and selectively corrode. In addition, the anodic polarization curve of the brazed joint showed values between those of the polarization curves of the brazing filler metal and the base metal, indicating that the corrosion resistance could be electrochemically evaluated in HCl aqueous solution.

Effect of Filler Metals on the Microstructures and Mechanical Properties of Dissimilar Low Carbon Steel and 316L Stainless Steel Welded Joints

2015 ◽  
Vol 819 ◽  
pp. 57-62 ◽  
Author(s):  
M.F. Mamat ◽  
E. Hamzah ◽  
Z. Ibrahim ◽  
A.M. Rohah ◽  
A. Bahador
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Base Metal ◽  
Arc Welding ◽  
316L Stainless Steel ◽  
Filler Metal ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Steel Base ◽  
Welding Electrode

In this paper, dissimilar joining of 316L stainless steel to low carbon steel was carried out using gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW). Samples were welded using AWS: ER309L welding electrode for GMAW and AWS: ER316L welding electrode for GTAW process. Determination of mechanical properties and material characterization on the welded joints were carried out using the Instron tensile test machine and an optical microscope respectively. The cross section area of the welded joint consists of three main areas namely the base metal (BM), heat affected zone (HAZ), and weld metal (WM). It was found that, the yield and tensile strengths of welded samples using ER316L filler metal were slightly higher than the welded sample using ER309L welding electrode. All welded samples fractured at low carbon steel base metal indicating that the regions of ER316L stainless steel base metal, ER316L filler metal and heat affected zone (HAZ) have a higher strength than low carbon steel base metal. It was also found that ER316L welding electrode was the best filler to be used for welding two dissimilar metals between carbon and stainless steel.

scholarly journals Kesan Logam Pengisi Terhadap Struktur Terkimpal Al 6061 Yang Teroksida Pada 600°C

2020 ◽  
Vol 78 (1) ◽  
pp. 48-59
Author(s):  
Nur Azida Che Lah ◽  
Muhamad Hellmy Hussin
Keyword(s):  
Surface Morphology ◽  
Base Metal ◽  
Oxidation Process ◽  
Filler Metal ◽  
Chemical Compositions ◽  
Elemental Mapping ◽  
Resistance To Oxidation ◽  
Oxide Phases ◽  
Kinetic Oxidation ◽  
Morphology Characterization

Samples of STK 6061 ER 4043 and STK 6061 ER 5356 were welded respectively using ER 4043 (Al-5%Si) and ER 5356 (Al-5%Mg) filler metal and were oxidized in air environment at 600oC for 40 hours. The focus of the analysis is on the welded metal where the base metal and the filler metal melt together to produce different chemical compositions. The analysis includes kinetic oxidation, material defect testing, surface morphology characterization using SEM-EDX, cross sectioning, elemental mapping and the oxide phases formed on the alloy surface. The results show that welded metal containing Mg tends to accelerate and accelerate the oxidation process, whereas welded metal containing Si may increase the resistance to oxidation.

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