FIELD: metallurgy; methods and devices for heat treatment of circular welded seams of large-sized thick-walled hollow articles.
SUBSTANCE: proposed method includes smooth delivery of heat-transfer agent at maintenance of preset temperature in heating zone not only by control of heat-transfer agent parameters but by control of parameters of heat-transfer agent discharged from heating zone; to this end, heat-transfer agent supply branch pipe is provided with flow swirler and holes for escape of waste heat-transfer agent are provided with dampers for control of flow section of exhaust holes; flow swirler is mounted in plane of welded seam being treated. Proposed method ensures smooth heating of welded seam and near-seam zone at reduced power requirements.
EFFECT: reduction of power requirements.
3 cl, 2 dwg
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