FIELD: process engineering.
SUBSTANCE: invention relates to welding. Proposed system (34) comprises heating inductor (36) arranged nearby welding torch or plasma cutter unit (16). Power supply induction source (38) of heating system (34) is configured to generate AC. Step-down transformer (42) is connected with said source (38). Inductor (36) is connected with step-down transformer (42) to receive AC and to induce eddy currents in part (32) to be welded for its heating ahead of moving welding arc or plasma cutter to homology temperature making at least 0.5. Said homology temperature is the relationship between material actual temperature and material fusion point, both being expressed in absolute units of temperature.
EFFECT: higher welding rate, increased penetration and higher mechanical properties and quality.
18 cl, 6 dwg
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