Low density press-hardening steel having enhanced mechanical properties

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United States of America Patent

PATENT NO 11951522
APP PUB NO 20230226585A1
SERIAL NO

18123592

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of forming a shaped steel object is provided. The method includes cutting a blank from an alloy composition including 0.05-0.5 wt. % carbon, 4-12 wt. % manganese, 1-8 wt. % aluminum, 0-0.4 wt. % vanadium, and a remainder balance of iron. The method also includes heating the blank until the blank is austenitized to form a heated blank, transferring the heated blank to a press, forming the heating blank into a predetermined shape to form a stamped object, and decreasing the temperature of the stamped object to a temperature between a martensite start (Ms) temperature of the alloy composition and a martensite final (Mf) temperature of the alloy composition to form a shaped steel object comprising martensite and retained austenite.

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Patent Owner(s)

Patent OwnerAddress
GM GLOBAL TECHNOLOGY OPERATIONS LLCP O BOX 300 MAIL CODE 482-C24-A65 DETROIT MI 48265

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lu, Qi Shanghai, CN 179 7628
Pang, Jiachen Shenyang, CN 7 11
Wang, Jianfeng Nanjing, CN 280 3358

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