СПОСОБ ХОЛОДНОЙ ПРОКАТКИ УГЛЕРОДИСТОЙ ПОЛОСОВОЙ СТАЛИ

摘要

FIELD: manufacture of cold rolled thin-sheet steel in reversing rolling mill. ^ SUBSTANCE: process is designed for producing cold rolled thin-sheet steel strips, mainly with width B = 1.03 - 1.63 m. Process is realized due to successively lowering steel thickness by providing predetermined total reduction epsilon whose value is inversely proportional to thickness value of rolled strip. According to invention for steel containing carbon [C] = 0.17 - 024 mass % and silicon [Si] = 0.17 - 0.7 mass % value epsilon is calculated with use of mathematical relation depending upon thickness of rolled piece. If carbon content is in range [C] = 0.05 - 0.11 mass % and silicon content [Si] = 0.17 mass % or less reduction value is calculated with use of individual mathematical relations for strip thickness h = 0.35 - 3.0 mm and h = 0.8 - 3.00 mm. If carbon content [C] = 0.006 mass % or less for h = 0.35 - 3.0 mm and B = 1.03 - 1.25 m reduction value epsilon1 is normalized by mathematical relation and for the same thickness values h at B = 1.251 - 1.4 m and for h = 0.35 - 0.40 mm at B = 1.401 - 1.630 m reduction value is decreased by 1.2 % absolute in comparison with value epsilon1 ; for h = 0.5 - 3.0 mm and B = 1.401 - 1.630 m reduction value epsilon is decreased by 2.7 % absolute in comparison with value epsilon1. ^ EFFECT: less loss of yield for steel sheets with improved properties at different elongation degrees. ^ 5 ex