Automotive steel and a method for the fabrication of the same

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United States of America Patent

PATENT NO 12054816
APP PUB NO 20210054476A1
SERIAL NO

16959282

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Abstract

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A strong and ductile automotive steel comprising 8-11 wt. % Mn, 0.1-0.35 wt. % C, 1-3 wt. % Al, 0.05-0.5 wt. % V, and a balance of Fe. By tuning the amount of austenite stabilizers, a dual phase microstructure of martensite and austenite with proper phase fraction can be achieved at room temperature. The martensite partitions C into the retained austenite grains. The martensite matrix can ensure the higher strength of automotive steel while the retained austenite grains with varied mechanical stability can improve the ductility of automotive steel, achieving the strength of 1500 MPa and the ductility of 20% simultaneously. The method for fabricating this automotive steel circumvents the high quenching temperature of conventional Q&P steels and therefore reduces the production price and is easy for mass production.

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Patent Owner(s)

Patent OwnerAddress
THE UNIVERSITY OF HONG KONGHONG KONG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
He, Binbin Hong Kong, CN 6 21
Huang, Mingxin Hong Kong, CN 16 3

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