MANUFACTURING METHOD OF COLD-ROLLED MARKETABLE PIPES WITH SIZE OF 170±1,5×3±0,25×370 mm WITH INCREASED ACCURACY AS TO WALL FROM STEEL GRADE "16Х12МВСФБР-Ш" FOR FAST NEUTRON REACTORS OF NEW GENERATION Russian patent published in 2015 - IPC B21B21/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to a manufacturing method of cold-rolled marketable pipes with the size of 170±1.5×3±0.25×370 mm with increased accuracy as to the wall from steel grade '16Х12МВСФБР-Ш' for fast neutron reactors of a new generation. ESR ingots are cast as hollow ones with the size of 490×in290×3000±25 mm, turned into hollow cakes with the size of 480×in300×3000±25 mm, heated to the temperature of 1130-1150°C, rolled on pilger mills using backing carbon-bearing rings into semi-finished hot-deformed pipes with the size of 338×25×11800±100 mm, pipes are straightened in a six-roll straightening machine, cut into two pipe workpieces with the size of 338×25×5900±25 mm, bored and turned into pipe workpieces with the size of 325×12×5900±25 mm, rerolled on ХПТ450 and ХПТ250 mills along routes - 325×12×5900±25 - 273×8×10000±40 - 219×5×19400±80 mm, pipes with the size of 219×5×19400±80 mm are cut into three pipe workpieces with the size of 219×5×6465±25 mm and rolled on ХПТ250 mill into marketable pipes with the size of 170×3×13400±50 mm, then, they are cut into three marketable pipes of equal length with the size of 170×3×4465±15 mm, which are cut into marketable pipe workpieces with the size of 170±1.5×3±0.25×370 mm or accepted as equal with the size of 170×1.5×3±0.25×4440 mm.

EFFECT: reducing metal consumption at hollow ESR ingot - semi-finished hot-rolled pipe workpiece processing.

2 cl, 1 tbl