What is cold welding? A cold arc welding is an energy-efficient method of welding, which produces high-quality welds with lower heat input. Instead of conventional welding, the energy is stored in an inert gas (typically argon, xenon or neon) that is vaporized as it is directed to the weld puddle. The resulting arc is a plasma stream that travels between the weld puddle and the work piece to form a strong joint.
Cold welding or contact gas welding is also known as plasma arc welding (PAW). This process involves direct injection of an inert gas into the joint where you wish to weld; the gas vaporizes rapidly as it comes into contact with the metal and the arc is formed. Unlike in the hot-wired welding processes, no molten or liquid phase is usually present in the final joint. Instead, the weld puddle contains the gaseous argon, neon or plasma that has been injected by the welder. If you are not familiar with how this process works, please read on as this will help you understand what is cold welding.
When welding, gas of argon or xenon are used because these gases have the right density for the task at hand. In PAW, the welder passes the welding product (the filler metal) through the puddle of argon gas. As the product moves from the welder to the work piece, the gas also travels along the welding path. This means that you don’t need to use as much fuel to generate the same amount of weld quality as you would if you used a pure gas. The overall weld quality is comparable to any pure gas.
When using a cold arc, the welder needs to ensure proper welding equipment is available and a shielding gas is applied to prevent the arc from the bare metal from reaching the filler metal. Once the arc is formed, the filler metal is moved up and down to allow the flux to collect at the base of the arc. This process of creating a continuous arc is what makes the process of cold work so effective.
So what is cold welding? How is it different than hot weld? With what equipment does the process take place? Basically, cold work is the conversion of an arc to a hot weld without the presence of an argon or xenon flake. The reason this process is known as “cold” is because it uses energy, meaning gas, instead of steam or water for the conversion. There are three types of cold arc: gas tungsten inert gas (GTFI), conductive metal arc (CMA) and coated metal arc (CMA).
GTFI is considered the lowest quality of all three processes. The product of a GTFI weld is often considered to be inferior to that of CMA and in some cases, it is not feasible to have a job that uses a GTFI weld. This is because the process of converting an GTFI to a CMA product involves melting the metal by the concentrated GTFI gas and then heating the metal by the fusing wire. This causes a product that has little if any conductivity to be formed with a small amount of filler metal.
CMA is considered the best quality of the three. Because of its process of heating only the part being joined and forming a very strong bond between the metal and filler wire, CMA is the most commonly used method. When using CMA, a higher quality product can be achieved with a lower cost of manufacturing. If you are interested in buying a welding machine, it is important that you research the different types of machines that are available. A welding machine is the piece of equipment that allows you to join the various metals with a low-cost investment.
Understanding what is cold welding? Cold fusion is also known as fusion cored arc welding or GACW. If you would like to learn more about this process and what your job outlook is, be sure to speak to a professional that can help you find out what your options are and whether or not you should use CMA or GAF. It is always a good idea to do research on any type of welding machine before you buy one. A professional will be able to give you the information that you need.