Invention Grant
- Patent Title: Electrical steel processing without a post cold-rolling intermediate anneal
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Application No.: US17544141Application Date: 2021-12-07
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Publication No.: US11694828B2Publication Date: 2023-07-04
- Inventor: Theodore E. Hill , Eric E. Gallo
- 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
- Agent Jeffrey R. Gray
- Main IPC: C21D8/02
- IPC: C21D8/02 ; C21D6/00 ; C21D9/46 ; H01F1/147 ; C22C38/06 ; C22C38/04 ; C22C38/00 ; C22C38/60 ; C22C38/02 ; C21D8/12 ; H01F1/16

Abstract:
Embodiments of the present invention comprise; annealing steel sheets (e.g., hot rolled steel sheets or thin cast strip steel); cold rolling the sheets in one or more cold rolling steps (e.g., with annealing steps between multiple cold rolling steps); and performing one or more of tension leveling, a rough rolling, or a coating process on the sheets after cold rolling, without an intermediate annealing step between the final cold rolling step and the tension leveling, the rough rolling, or the coating process, or the customer stamping or final customer annealing. In order to achieve the desired properties for the steel sheet, stamping and final annealing is performed by the customer. The new process provides an electrical steel with the similar, same, or better magnetic properties than an electrical steel manufactured using the traditional processing that utilizes an intermediate annealing step after cold rolling and before the stamping and final annealing.
Public/Granted literature
- US20220090220A1 ELECTRICAL STEEL PROCESSING WITHOUT A POST COLD-ROLLING INTERMEDIATE ANNEAL Public/Granted day:2022-03-24
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