Stainless steel tube composition welding process

The composition welding process includes: argon arc welding machine + low temperature plasma welding, high frequency welding + low temperature plasma welding, high frequency heating + three welding machine argon arc welding machine, high frequency heating + low temperature plasma + argon arc welding machine. The composition of electric welding significantly improves the welding speed of electric welding. The electric welding quality of the high-frequency heating welded pipe is similar to that of the basic argon arc welding machine and low-temperature plasma welding. Electric welding is easy to use, and all electric welding system software is easy to maintain automation technology. The composition is convenient to connect with the original high-frequency welding equipment, the project investment is low-cost, and the economic benefits are good. TIG welding has been widely used in manufacturing. High-quality welding can be obtained, commonly used in electric welding of rare metals, stainless steel plates, ultra-high-strength steel plates and other raw materials. However, TIG welding has defects such as melting density (<3mm) and low efficiency of electric welding. For thick steel plates, multiple passes of welding and beveling are necessary. Increasing the amount of welding current can increase the penetration, but the increase in the total width and the volume of the molten pool is much larger than the penetration.

Specific argon tungsten arc welding has caused widespread concern around the world in recent years. This technology is to apply a layer of specific flux on the surface of the electric welding before the electric welding. Under the same electric welding welding standard, compared with the traditional TIG welding, the penetration depth can be greatly increased (up to 300%). For electric welding of 8mm thick steel plates, a large penetration or penetration can be obtained at one time, and for thin plates, it is possible to reduce the welding heat input of electric welding without changing the welding rate of electric welding. At this stage, A-TIG welding can be used for electric welding of stainless steel plates, alloy steels, nickel-based superalloys and titanium metals. Compared with traditional TIG welding, A-TIG welding can further improve productivity, reduce costs and expenses, and reduce electric welding deformation, which has a very critical application market prospect. The first condition for A-TIG welding is the selection of activator components. At this stage, the key specific components are compounds, fluoride and fluoride. Different raw materials have different specific ingredients. As everyone knows, because of the necessity of this technology, the ingredients and secret recipes of surfactants are often patented in PWI and EWI, and they are rarely reported in publications. At this stage, scientific research on A-TIG welding is focused on the principle of activator function and the application technology of activator electric welding.

At this stage, there are three key types of surfactants developed, designed and used in countries all over the world: compounds, fluorides and fluorides. The key to the surface active agent developed and designed by PWI for electric welding of titanium metal is compound and fluoride, but fluoride has high toxicity and side effects, which is unfavorable for application and promotion. At this stage, the key surfactants for overseas electric welding of stainless steel plates and alloy steels are compounds, and the surfactants of electric welding titanium raw materials contain fluorides.

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