ESR BLANK-INGOT FOR PIERCING AND ROLLING-OFF AT TWO-ROLL SCREW ROLLING MILL TO REROLLED SLEEVES-BLANKS FOR PRODUCTION OF MACHINED 610×36,53×3200-3550 mm PIPES FROM 08X18H10T-GRADE STEEL FOR NUCLEAR POWER ENGINEERING STRUCTURES

摘要

FIELD: metallurgy.SUBSTANCE: blank-ingot features cylinder shape sized to 610±10-1750±50 with axial bore size of 100±5.0 mm, ends shaped to spherical bulged surfaces and machined spherical bulged surfaces with smoothness not over 80 mcm. Sizes of spherical bulged surfaces are defined by expressions: L=0.11L±15. D=0.91D±5.0, R=0.98R±5.0, L=0.07L±15, D=0.92D±5.0, R=0.81R±5.0, where L=1750±50 is ingot blank length, mm; D=610±10 -is blank-ingot diameter, mm; R=310±5 is blank-ingor radius, mm; Lis blank-ingot spherical bulged surface length at bottom side, mm; Dis blank-ingot bottom end shaped base, mm; Ris radius of blank-ingot bottom end, mm; Lis length of blank-ingot bottom end on shrink end, mm; Dis diameter of blank-ingot bottom end on shrink end, mm; Ris radius of blank-ingot bottom end on shrink end, mm.EFFECT: decreased metal consumption factor.1 dwg, 1 tbl