Effect of torch position and angle on welding quality and welding process stability in Pulse on Pulse MIG welding–brazing of aluminum alloy to stainless steel

2015 ◽  
Vol 84 (1-4) ◽  
pp. 705-716 ◽  
Author(s):  
Jianxiong Li ◽  
Huan Li ◽  
Huiliang Wei ◽  
Ying Gao
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Welding Process ◽  
Welding Quality ◽  
Mig Welding ◽  
Process Stability

An Investigation of Dissimilar Welding Aluminum Alloys to Stainless Steel by the Tungsten Inert Gas (TIG) Welding Process

2017 ◽  
Vol 904 ◽  
pp. 19-23
Author(s):  
Van Nhat Nguyen ◽  
Quoc Manh Nguyen ◽  
Dang Thi Huong Thao ◽  
Shyh Chour Huang
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Welding Process ◽  
Dissimilar Materials ◽  
Welding Current ◽  
Tig Welding ◽  
Inert Gas ◽  
Dissimilar Welding ◽  
Adjacent Area ◽  
Welding Seam

Welding dissimilar materials has been widely applied in industries. Some of them are considered this as a strategy to develop their future technology products. Aluminum alloy and stainless steel have differences in physical, thermal, mechanical and metallurgic properties. However, selecting a suitable welding process and welding rods can solve this problem. This research aimed to investigate the T-joint welding between A6061 aluminum alloy and SUS304 stainless steel using new welding rods, Aluma-Steel by the Tungsten Inert Gas (TIG) welding process. The mechanical properties, the characteristics of microstructure, and component analysis of the welds have been investigated by the mechanical testing, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). As a result, the fracture occurred at the adjacent area between welding seam and A6061 alloys plate. The thermal cracking appeared at central welding-seam along the base metals if high welding current. A large amount of copper elements found in the welds due to using the new welding rod, Aluma-Steel rod.

Analysis of Filler Metal Composition on Weld Dilution of Austenitic Stainless Steel by TIG and MIG Welding

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
G.T. Gopalakrishna ◽  
B.S. Ajaykumar ◽  
K.R. Vishnu
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Tensile Test ◽  
Base Material ◽  
Welding Process ◽  
Nuclear Industry ◽  
Tig Welding ◽  
Bending Test ◽  
Mig Welding ◽  
Weld Region

Austenitic stainless steels are very important material and extensively used for various applications in fertilizer industry, petrochemical industry, nuclear industry and food industry. Austenitic stainless steel 316L alloyed with small percentage of nitrogen is called 316LN. 316LN is widely used only in nuclear applications and it is also called high temperature steels. This nitrogen alloyed steels 316LN will work at higher temperature environment along with radiation environment without losing its properties. The welding of this 316LN steel poses challenge due to problems like sensitization to inter granular corrosion, stress corrosion cracking and even hot cracking. Selecting the type of welding and filler material is more important for welding the 316LN austenitic stainless steel (SS). In this paper SS 316LN material is being welded with TIG and MIG welding. Three pairs of SS 316LN plates were used for experimental work. Filler electrode ER316L is used for TIG and MIG121 is used for MIG welding. After the welding process, hardness test, tensile test and bending test were performed to check the mechanical properties of the specimen. Microstructure of the specimen is observed at the weld region. The results show that the welded joint is stronger than the base material in TIG welding process compared to MIG welding, combination of TIG and MIG welding. Hardness values are observed to be higher at the weld region than the base material. Tensile test results show that the ultimate tensile strength of welded plate is greater than that of base materials and TIG welding process is better than other two processes. The microstructure images show that there is a continuous and uniform welding and the joint is defect free from cracks.

Welding Process Optimization for Orthotropic Compound Bridge Plates

2014 ◽  
Vol 525 ◽  
pp. 564-567
Author(s):  
Yong Zhi Li ◽  
Fu Yi Yu
Keyword(s):  
Stainless Steel ◽  
Process Optimization ◽  
Composite Plate ◽  
Welding Process ◽  
Railway Bridge ◽  
Welding Quality ◽  
Compound Plate ◽  
Under Construction ◽  
First Time

Compound plates of stainless steel is used to weld under construction in the Southern links railway bridge for the first time in China, but there occurs weld warpage of the convex parts and roughness appears excessive on the overall composite plate and severe deformation in the early phase of construction and the quality of railway bridge is affected seriously. Reasons of the impacting weld quality are analyzed and specific measures are proposed, and the construction program is optimized,too. A good foundation for the compound plate welding is layed and the efficiency and quality of welding can be improved .All of these will be contribute to ensure the overall quality of the welding quality of railway bridge.

scholarly journals DISSIMILAR JOINING A6061 ALUMINUM ALLOY AND SUS304 STAINLESS STEEL BY THE TUNGSTEN INERT GAS WELDING PROCESS

2018 ◽  
Vol 54 (5A) ◽  
pp. 64
Author(s):  
Nguyen Quoc Manh
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Welding Process ◽  
Dissimilar Materials ◽  
Inert Gas ◽  
Adjacent Area ◽  
Welding Seam ◽  
Alloy Plate ◽  
Future Technology ◽  
Sus304 Stainless Steel

Welding dissimilar materials has been widely applied in industries. Some of them are considered this as a strategy to develop their future technology products. Aluminum alloy and stainless steel have differences in physical, thermal, mechanical and metallurgic properties. However, selecting a suitable welding process and welding rods can solve this problem. This research aimed to investigate the T-joint welding between A6061 aluminum alloy and SUS304 stainless steel using new welding rods, Aluma-Steel by the Tungsten Inert Gas (TIG) welding process. The mechanical properties, the characteristics of microstructure, and component analysis of the welds have been investigated by the mechanical testing, microhardness testing, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). As a result, the fracture occurred at the adjacent area between welding seam and A6061 aluminum alloy plate. The average microhardness between welding seam and SUS304 stainless steel is 279.72 HV, welding seam and A6061 aluminum alloy of 274.50 HV. A large amount of copper elements found in the welds due to using the new welding rod, Aluma-Steel rod.

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