Cantor Colburn LLP
Ultra high-strength and high-ductility steel sheet having excellent yield ratio and manufacturing method therefor
Provided is an ultrahigh-strength steel sheet for a vehicle and, more specifically, to an ultrahigh-strength and high-ductility steel sheet having excellent yield ratio and a manufacturing method therefor. Provided is an ultrahigh-strength and high-ductility steel sheet for cold press forming and a manufacturing method therefor, the steel sheet ensuring ultrahigh strength and high ductility since an alloy component of steel and manufacturing conditions are controlled and, simultaneously, having excellent impact characteristics due to a high yield strength ratio (yield ratio). Provided is the steel sheet capable of satisfying formability and impact stability, which are required for a vehicle steel sheet for cold forming, and replacing a conventional steel sheet for hot press forming, thereby reducing manufacturing costs.
POSTECH ACADEMY-INDUSTRY FOUNDATION POSCO
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C21D C21D C23C C21D C23C C22C C22C C22C C21D C22C C21D C23C C21D C22C C21D C21D C22C C22C C21D C21D C22C C22C C22C C23C C21D
inventional inventional inventional additional inventional inventional additional inventional additional inventional inventional inventional inventional additional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional inventional
Sung-Hak Nack-Joon Kyoo-Young Won-Hwi Joo-Hyun Sea-Woong
Lee Kim Lee Lee Ryu Lee