When soldering parts, solder is used, which, when melted, spreads between the two parts of the product, solidifies and connects them. Brazing does not require melting the base metal and allows you to unsolder different parts of the part if necessary. However, it is less reliable than welding. The latter makes it possible to form a stable interatomic bond between parts and is widely used in industry, particularly in mechanical engineering. The advantage of welding is significant metal savings and high reliability of such a connection. A distinction is made between pressure and fusion welding. Fusion welding involves the formation of a weld pool of molten metals and their solidification to form a weld. The following methods of fusion welding are widely used: arc, electron beam, laser, electroslag, and gas. Pressure welding involves increasing the plasticity of the metal in the welding zone; these parts are heated and compressed. The following pressure welding methods are known: contact, diffusion, electrosonic, friction, explosion, etc.
