METHOD OF CREEP ANNEALING OF TITANIUM SHEET ROLL STOCK AND RELATED DEVICE Russian patent published in 2009 - IPC B21D1/00 C22F1/18 

FIELD: metallurgy.

SUBSTANCE: invention relate to metal treatment by pressure and intended for sheet roll stock correction by creep annealing. Mainly the invention can be applied to large-size sheets and slabs made from titanium alloys. A batch consisting of one or several sheet items is mounted onto steel heated stove and vacuum is created in operating environment while, concurrently, outer surface of the batch is evenly loaded. Then it is heated to the temperature of annealing, exposed and forcibly cooled to no more than 15°C when heat field is uneven on the lower surface of batch and creeping velocity is 10^-5-10^-8 c^-1. The device includes frame, housing, heaters and free-running filler, elastic film, vacuuming and cooling system, ceramic stove with heat-resistant steel flat plate being installed on the stove. The thickness of flat plate is within 90 to 200 mm. In addition, heaters are mounted in grooves stretching along the whole length of ceramic stove. The grooves are also divided into stand-alone adjustable zones.

EFFECT: improved accuracy of large-size sheet items correction, items strength and extended lifetime.

5 cl, 2 dwg, 1 ex