METHOD OF THIN-SHEET STEEL PRODUCTION FOR FLAT ENAMEL ARTICLES Russian patent published in 2008 - IPC B21B1/28 

FIELD: technological processes; metallurgy.

SUBSTANCE: invention is intended for production of thin-sheet steel 08YuR with thickness of 0.38±0.01 mm for flat enamel articles. Method includes cold rolling, annealing of rolled strips according to preset mode and pinch-pass rolling of annealed steel. Cold rolling is performed in four stages with value of total relative drafting ε_ε=80.5...81.5% and with values of drafting in stages: ε₁=41...42%, ε₂=39...40%, ε₃=38...39% and ε₄=12...13%, accepting value of specific tension between unreeler and I mill T0=35 n/mm², after I...III stages, accordingly, T₁=120 n/mm², T₂=100...80 n/mm², T₃=120...100 n/mm² and between winding reel and the last mill - T=58 n/mm², annealing at the temperature of 620°...630°C with delay at this temperature for 19...21 hours, and annealed steel is tempered with drafting of ε=1.0...1.3%.

EFFECT: preparation of products with required flatness.

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