METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530x23-28 mm SIZE FROM THE STEEL GRADE "08Х18Н10-Ш" Russian patent published in 2017 - IPC B21B19/06 

Abstract RU 2615918 C1

FIELD: metallurgy.

SUBSTANCE: method comprises the casting of hollow ingots by electroslag remelting with 740×in.480×2600±50 mm, boring and refacing in billet ingots with size of 720×in.520×3200±50 mm, heating the billet ingots in reheat furnaces to the temperature of 1260-1270°C, delivery of them into ingot trolley, blowing with compressed air or inert gas, supply inside of billet ingots from two ends of lubricant with mass 2000-2500 g in the form of mixture of graphite with sodium chloride in a ratio of 50/50, transportation of hollow billet ingots to the upstream side of the Pilger mill, rolling at Pilger mill into stock with size 550×30×10300-10700 mm, cutting of process wastes: bare ends and pilger heads by hot cutting saw, straightening on a six-roll straightening machine to the curvature of not more than 6.0 mm on the tube stock length, austenitizing, tube stock cutting into two pipes of equal length, mechanical treatment-boring and turning of hot-rolled pipe stock with size 550×30×5150-5350 mm into commercial pipes with size 530×8-12×5150-5350 mm.

EFFECT: reduction of metal consumption in pipes production.

2 cl, 1 tbl

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RU 2 615 918 C1

Authors

Safyanov Anatolij Vasilevich

Dates

2017-04-11Published

2016-03-22Filed