Text 2 Kinds of welding. 1. Read and translate the texts. Gas Welding. Gas welding is a non-pressure process using heat from a gas flame. The flame is applied directly to the metal edges to be joined and simultaneously to a filler metal in the form of wire or rod, called the welding rod, which is melted to the joint. Gas welding has the advantage of using equipment that is portable and does not require an electric power source. The surfaces to be welded and the welding rod are coated with flux, a fusible material that shields the material from air, which would result in a defective weld. Arc Welding Arc-welding is the most important welding process for joining steels. It requires a continuous supply of either direct or alternating electrical current. This current is used to create an electric arc, which generates enough heat to melt metal and create a weld. Arc welding has several advantages over other welding methods. Arc welding is faster because the concentration of heat is high. Also, fluxes are not necessary in certain method of arc welding. The most widely used arc-welding processes are shielded metal arc, gas- tungsten arc, gas- metal arc, and submerged arc. Vocabulary flame пламя edge край simultaneously одновременно filler наполнитель wire проволока rod стержень

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