FIELD: pipe rolling production.
SUBSTANCE: invention relates to pipe rolling production, namely to a method for producing seamless cold-deformed pipes of 426×14-19 mm size of steel grade 08H18N10T-SH. Method includes casting of hollow ingots with electroslag remelting of 670×in.430×3200±50 mm, boring and turning them into hollow ingots-billets of the size 650×in. 450×3200±50 mm, heating of ingot-billets in a methodical furnace to a temperature of 1250–1260 °C, rolling them on a pilgrim mill into a 490×38×8400-8700 mm, austenization, cutting of pipes into two pipes of equal length, machining – boring and turning into billets-billets with dimensions: 474×19×4200-4350 and 474×22×4200-4350 mm, rolling of mechanically processed billets at the cold reducer along the routes: 474×19×4200-4350-426×14×5950-6200, 474×19×4200-4350-426×15×5500-5750 and 474×19×4200-4350-426×16×5200-5400 mm; 474×22×4200-4350-426×17×5650-5850, 474×22×4200-4350-426×18×5300-5500 and 474×22×4200-4350-426×19×5100-5250 mm and heat treating of cold-rolled pipes.
EFFECT: cost of expensive metal is reduced as well as roughness of the outer and inner surfaces.
3 cl, 1 tbl
