Welding method and application analysis of pure nickel and austenitic stainless steel Pure nickel In industrial production, the welding of pure nickel and austenitic stainless steel is of great significance. Due to the differences in the physical and chemical properties of pure nickel and austenitic stainless steels, the respective welding characteristics need to be considered when welding, as well as the peculiarities of dissimilar material welding. In this paper, we will analyze the application of manual arc welding, tungsten inert gas arc welding, molten inert gas arc welding, plasma arc welding, laser welding and other welding methods in the welding of pure nickel and austenitic stainless steel, and conclude that tungsten inert gas arc welding is the ideal welding method.
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1. Manual arc welding.
Manual arc welding is a commonly used welding method, which has the advantages of flexible operation and wide range of application. In the welding of pure nickel and austenitic stainless steel, manual arc welding can obtain better welding quality, but the welding speed is slower and the production efficiency is lower. In addition, manual arc welding requires a lot of electrical energy and requires a high level of skill from the welder, so it is costly.
2. Tungsten inert gas arc welding.
Tungsten inert gas arc welding is a high-quality, high-efficiency welding method, which has the advantages of good arc stability and controllability, and a wide range of applicable plate thicknesses. In the welding of pure nickel and austenitic stainless steel, tungsten inert gas arc welding can obtain high-quality welded joints with low distortion to thin plate welding. In addition, tungsten inert gas arc welding can achieve high-quality welding of pure nickel and stainless steel under pure argon protection conditions, so it is widely used in the welding production of pure nickel and austenitic stainless steel.
3. Melting extremely inert gas shielded welding.
MIG/MAG welding has the advantages of fast welding speed and high deposition efficiency, but it is rarely used in the welding of pure nickel and austenitic stainless steel. In production practice, MIGS welding requires a large amount of filler material and requires a high skill of the welder, so the cost is high.
4. Plasma arc welding.
Plasma arc welding has the characteristics of high temperature, high speed, and high energy density, which can achieve high-quality welding with low heat input. In pure nickel and austenitic stainless steel welding, plasma arc welding can obtain high-quality welded joints, but the welding speed is slower and the production efficiency is lower. In addition, plasma arc welding requires the use of specialized equipment and technical support, so the cost is high.
5. Laser welding.
Laser welding has the advantages of high energy density, high precision, high speed, etc., and can achieve high-quality welding with low heat input. In pure nickel and austenitic stainless steel welding, laser welding can obtain high-quality welded joints, but it requires the use of specialized equipment and technical support, so the cost is higher. In addition, laser welding will produce a large heat input during the welding process, which can easily lead to problems such as welding deformation and expansion of the heat-affected zone.
In summary, tungsten inert gas arc welding has a good application prospect in the welding of pure nickel and austenitic stainless steel. This method has the advantages of good arc stability and controllability, wide range of applicable plate thickness, and can prevent large deformation of thin plate after welding. In addition, tungsten inert gas arc welding can achieve high-quality welding of pure nickel and stainless steel and other welded materials under pure argon protection conditions, and the welding equipment is simple, low cost and economical. After comprehensive comparative analysis, it can be concluded that tungsten inert gas shielded welding is the ideal welding method for pure nickel and austenitic stainless steel, which provides a reference for the research and production of welding of pure nickel and austenitic stainless steel.