METHOD FOR PRODUCING PIPE hex - blanks for compact storage and transportation of spent nuclear fuel from NIZKOPLASTICHNOY boron steel containing 1.3 to 3.5

摘要

1. A method of manufacturing hexagonal pipe blanks for compact storage and transportation of spent nuclear fuel from nizkoplastichnoy boron steel containing 1.3 to 3.5%, comprising a hollow cast ingot electroslag remelting size (480-490) × 2300 × vn.270 -2500 mm bore and refacing to remove shells and traces of flux in the hollow ingot, billet size (470-480) × × 2300-2500 vn.280 mm with a surface roughness R≤40 microns, heating to plasticity temperature, rolling hollow slitkov- blanks for pilger on the mandrel 264/265 mm diameter repartition nye pipe-lash size 290 × 12 mm × 22000-23000, cutting of pipe-lashes on two pipes of equal length or a multiple of the length of the pig workpiece correction for a six-high leveler using rolling heating temperature, subsequent to their cutting of the pipe-fold, machining -rastochku refacing and the size of 284,8 + 2,0 / -3,0 × 6 + 2,0 / -1,0 × 5250-5750 mm, ultrasonic testing, drilling holes for the bolt pulling chain rollforming mill, warm profiling hex tube billet size "turnkey" 257 + 2 / -3 / × 6 + 2 / -1 × 5250-5750 mm, removal of the transition portion shestigra CENI to a circle, cutting the ends and cutting hexagonal pipe blanks to length 4300 + 80 / -30 mm, control of the free cross acceptance of the caliber and hexagonal-tube preforms for compliance TU 14-3-1630-89, characterized in that hollow cast ingots electroslag remelting size 515 ± 5 × 5 × vn.320 ± 2750 ± 50 mm, which grind and the bore in the hollow billet ingot measuring 500 ± 2 × 2 × vn.330 ± 50 2750 ± mm.2. A method according to claim 1, characterized in that the hollow billet ingot was heated to a temperature of 1080-1100 ° C and rolled in pilger mill on mandrel