STEEL HOT-ROLLED BLANK FOR SHAPING AND METHOD OF ROLLING Russian patent published in 2009 - IPC C21D1/02 C21D8/02 

Abstract RU 2344181 C2

FIELD: technological processes.

SUBSTANCE: invention concerns metal processing by pressure, particularly strip blank manufacturing for shaping. To improve plasticity properties of semifinished rolled products for steel strip blanks, carbon, manganese and silicon content depends on σt value and blank thickness h according to the following ratios: C'e=(σt-262.5)/130 for h≥6 mm and Ce"=(σt-291)/124 for h<6 mm, where Ce=C+Mn/9+Si/3. A blank is hot-rolled from semifinished rolled product at specified temperature and cooled down at a rate depending on thickness h after rolling and specified flow limit according to the following ratio: V'cool=(σt-297)/0.94, degree/s, for h≥6 mm and V"cool=( σt-306):2.9 degree/s, for h<6 mm.

EFFECT: enhanced plasticity properties in semifinished rolled products for steel strip blanks.

2 cl, 2 ex

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RU 2 344 181 C2

Authors

Antipanov Vadim Grigor'Evich

Kunitsyn Gleb Aleksandrovich

Kornilov Vladimir Leonidovich

Torokhtij Valerij Petrovich

Dates

2009-01-20Published

2006-09-14Filed