Invention Grant
- Patent Title: Methods of producing continuously cast hot rolled high strength steel sheet products
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Application No.: US16868286Application Date: 2020-05-06
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Publication No.: US11560606B2Publication Date: 2023-01-24
- Inventor: David Paul Hoydick , Eduardo Augusto Silva , Matthew Michael McCosby
- Applicant: United States Steel Corporation
- Applicant Address: US PA Pittsburgh
- Assignee: United States Steel Corporation
- Current Assignee: United States Steel Corporation
- Current Assignee Address: US PA Pittsburgh
- Agency: Leech Tishman Fuscaldo & Lampl
- Agent Alan G. Towner
- Main IPC: C21D9/46
- IPC: C21D9/46 ; B32B15/01 ; C22C38/04 ; C22C38/02 ; C22C38/06 ; C21D8/02 ; C21D6/00

Abstract:
Methods of producing high strength continuously cast hot rolled steel sheet products are disclosed. The methods include continuously casting a steel slab and then hot rolling with finish rolling on a hot strip mill, quenching on the hot strip mill to form a predominantly matrensitic microstructure, and performing a thermal cycling step including soaking at an intercritical temperature followed by holding at a lower temperature. The resultant hot rolled steel sheet products have a microstructure comprising ferrite and retained austenite. Steels processed in accordance with the present invention exhibit favorable combined ultimate tensile strength and total elongation (UTS·TE) properties, and may fall into the category of Generation 3 advanced high strength steels, desirable in various industries including automobile manufacturers.
Public/Granted literature
- US20200332385A1 METHODS OF PRODUCING CONTINUOUSLY CAST HOT ROLLED HIGH STRENGTH STEEL SHEET PRODUCTS Public/Granted day:2020-10-22
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