FIELD: metallurgy.
SUBSTANCE: proposed method is realised in heating chamber shaped to a segment following the article heated part surface and confined by housing, gas feed and smoke bleed manifolds and article heated surface. Article surface fragment is heated in heating chamber by surface combustion of diffusion gas tongues displacing along heating surface and by system of air jets flowing thereat perpendicularly. Formed combustion products are evacuated via collection manifold by smoke sucker and removed from working zone.
EFFECT: efficient heating before welding, high-precision local out-of-furnace heat treatment after welding.
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