PROCESS OF FUSION WELDING OF COPPER ARTICLES, MAINLY PARTS OF CRYSTALLIZER Russian patent published in 1996 - IPC

FIELD: welding. SUBSTANCE: preliminary heating and welding are conducted with the aid of plasma generators 3, 4 and 5 integrated in a group of at least three plasma generators. Each of them is connected to one of phases of three-phase power supply source. Plasma generators 3, 4, 5 and welded parts 1 and 2 of crystallizer have relative movement. In this case plasma generators 3, 4 and 5 move along joint of welded parts and their anode spots are arranged on joint in series. With relative movement weldpool is formed under third plasma generator which later transforms into weld with cooling. Relative movement of plasma generators and welded articles is conducted till anode spot of second plasma generator of each group of plasma generators is matched with start of weld, then movement is stopped and relative movement of plasma generators and welded articles is reversed with closure of circular weld. With this weldpool is formed under second plasma generator. EFFECT: expanded application field, improved efficiency of process. 2 cl, 3 dwg