METHOD OF PATTER HEATING IN HOT DIE FORGING OF OIL-GAS-HEAT-WATER PIPE STEEL T-JOINTS AND SYSTEM TO THIS END Russian patent published in 2013 - IPC B21C37/29 B21D37/16 B21K1/14 B21K29/00

Abstract RU 2481168 C1

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for heating billet in hot die forging. Plasma flow is directed from top to bottom in hearing gap formed between billet surface and strap. Strap with plasma flow inlet allows forming the zone of plasma flow propagation and outlet for cooled plasma flow. For this, its inside on both side from inlet is provided with heat-insulation tape spacers to comply with billet zone selected for forming. Zone-forming substrate is located opposite aforesaid heating gap. Said substrate and strap make a pattern of billet heating zone.

EFFECT: uniform and controlled heating, higher quality.

9 cl, 4 dwg

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RU 2 481 168 C1

Authors

Markin Boris Vasil'Evich

Dates

2013-05-10—Published

2011-09-26—Filed