PREPARATION OF ESR INGOTS-BILLETS FROM ALLOYED GRADES OF STEEL AND ALLOYS TO PILGER PIPE ROLLING

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to pipe rolling. Solid or hollow ESR ingots-billets from alloyed steels or alloys are heated to ductility temperature. They are pierced at helical rolling stand. For rolling of produced sleeves, backing rings of carbon steels and conical sections are produced to design sizes. Sleeves and rider rings are heated. Fitted on mandrel are mandrel ring and backing wing with its cylindrical section to mandrel ring, and sleeve. Produced composed sleeve is rolled to re-rolled pipe with complete fed of Pilger head to alloy-free metal.;EFFECT: complete rolling of Pilger heads at ruled out seizure of mandrel in pipe and pipe rejection.;4 cl, 1 dwg