PRODUCTION OF 530×25-60 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF '10Х9МФБ-Ш'-GRADE STEEL

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to metallurgy, particularly, to pipe rolling. Hollow ESR ingots are bored and turned to hollow blanks sized to 660xvn.380x2100±50 mm, heated to ductility temperature and broached-rolled at cross-rolling mill to sleeves sized to 670xvn.515x3170-3330 mm. At TPU 8-16'' with Pilger mills, sleeves are rolled to commercial pipes sized to 550x31x7100-7500 - 550x45x5400-5700 mm.;EFFECT: higher mechanical properties and precision of pipe sizes.;2 cl, 1 tbl