Views:226 Author:Site Editor Publish Time: 2020-01-14 Origin:Site
Some of the things that can happen when welding stainless steel are charcoal-colored welds, warped metal and all will get you frustrated bright stainless steel contains additional alloying elements such as molybdenum and chromium together with the common element present in carbon stell. This additional elemts may present new challenge when you engage in the process of fusing stainless steel pieces together. When welding stainless steel, there are many factors to consider. One of such factors is the decision of what welding process to adopt.
Here, we will be looking at the welding process of bright steel tube and pipes.
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The metal inert gas welding: the metal inert gas welding also known as gas metal arc welding (GMAW) is specifically used in welding stainless steel. Carbon steel welding and stainless steel are similar in a number of ways. However, the electrical polarity is the same and there is no need to use spinal drive rolls. Here, just lower amounts of oxygen are allowable. They are kept at best 2 percent or less. However, inert gases are prominent as the shielding gas can contain more of helium, argon and carbon dioxide.
Tungsten inert gas: this process often used in the stainless steel welding requires a direct electrode carrying a negative current polarity. In industrial welding, the bright annealing furnace for stainless steel tubes in almost 100% helium or argon shielding gas. To avoid making a weld that will be easily prone to corrosion, the stainless steel filler metal needs to be use. Also, travel speed needs to be kept somewhat fast while the heat input needs to be kept as low as possible.
Flux-cored arc welding: basically, it is not ideal for the stainless steel welding process to makes use of flux. However, the flux-cored process is perfect and provides a better option and a better result especially for the bright annealed stainless steel tubing. Compared to the flux-cored arc stainless steel welding, the gas-shielded flux-cred arc welding provides a better option since it relies more on the flux as a means of shielding the process and the weld metal from atmospheric effects.
Metal-cored arc welding: Metal-cred arc welding provides a better alternative to both the gas shielded flux-cred arc welding and the self-shielded flux cored arc welding. The reason is that the metal cored arc welding unlike the processes does not depend on flux at all. The filler material metal core contains more of powdered metals. This helps to increase deposition. However, metal-cored arc welding can be applied in making high-quality welds on bright stainless steel in the presence of proper shielding gas and wire feeding system.
Laser beam welding (LBW): When it comes to going stainless steel together at tremendous speed and with very low heat input, the laser beam welding is an ideal process. However, when welding with laser care needs to be taken to avoid cracking or porosity. This can be avoided through optimizing the weld parameter and reducing the amount of oxygen.