High-strength high-tenacity steel plate with tensile strength of 800 MPa and production method therefor

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United States of America

PATENT NO 11319607
APP PUB NO 20170349960A1
SERIAL NO

15536743

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Abstract

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Disclosed are a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength and a method for manufacturing the same, the chemical composition of the steel plate in weight percentage being: C: 0.15-0.25%, Si: 1.0-2.0%, Mn: 1.2-2.0%, P≤0.015%, S≤0.005%, Al: 0.5-1.0%, N: ≤0.006%, Nb: 0.02-0.06%, O≤0.003%, and the balance being Fe and other inevitable impurities, and 1.5%≤Si+Al≤2.5%. By adopting an isothermal heat treatment a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength, which has a microstructure mainly including bainite ferrite and residual austenite, is obtained impact energy.

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Patent Owner(s)

Patent OwnerAddress
BAOSHAN IRON & STEEL CO LTD201900 FUJIN ROAD BAOSHAN DISTRICT SHANGHAI 885 SHANGHAI CITY SHANGHAI CITY 201900

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Huanrong Shanghai, CN 11 7
Wang, Wei Shanghai, CN 2815 17926
Yang, Ana Shanghai, CN 13 8

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