Invention Grant
- Patent Title: Complex metallographic structured high strength steel and method of manufacturing
- Patent Title (中): 复合金相结构高强度钢及其制造方法
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Application No.: US13754721Application Date: 2013-01-30
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Publication No.: US09157138B2Publication Date: 2015-10-13
- Inventor: Weiping Sun
- Applicant: NUCOR CORPORATION
- Applicant Address: US NC Charlotte
- Assignee: Nucor Corporation
- Current Assignee: Nucor Corporation
- Current Assignee Address: US NC Charlotte
- Agency: Moore & Van Allen PLLC
- Main IPC: C22C38/58
- IPC: C22C38/58 ; C21D6/00 ; C21D8/02 ; C21D9/46 ; C22C38/04 ; C22C38/06 ; C23C2/06 ; C23C2/12 ; C23C2/40 ; B32B15/01 ; B32B15/04 ; C22C38/00 ; C22C38/02 ; C22C38/08 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/20 ; C22C38/24 ; C22C38/26 ; C22C38/28 ; C22C38/38 ; C22C38/42 ; C22C38/46 ; C22C38/48 ; C22C38/50
Abstract:
A multi-phase steel sheet having microstructure having in combination ferrite, martensite of between 3% and 65% by volume, and at least one microstructure selected from the group consisting of, bainite and retained austenite, and having fine complex precipitates selected from the group of TiC, NbC, TiN, NbN, (Ti.Nb)C, (Ti.Nb)N, and (Ti.Nb)(C.N) particles having at least 50% smaller than 20 nm in size, and physical properties having tensile strength greater than about 780 megapascals and at least one of the properties of elongation greater than about 10%, yield ratio greater than about 70%, and hole expansion ratio greater than about 50%.
Public/Granted literature
- US20130136950A1 COMPLEX METALLOGRAPHIC STRUCTURED HIGH STRENGTH STEEL AND METHOD OF MANUFACTURING Public/Granted day:2013-05-30
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