Invention Grant
- Patent Title: Nitriding apparatus for manufacturing a grain-oriented electrical steel sheet
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Application No.: US17124493Application Date: 2020-12-17
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Publication No.: US11761074B2Publication Date: 2023-09-19
- Inventor: Yukihiro Shingaki , Hirotaka Inoue
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: KENJA IP LAW PC
- Priority: JP 14180300 2014.09.04
- The original application number of the division: US15502259
- Main IPC: F27D7/02
- IPC: F27D7/02 ; C23C8/26 ; C21D9/46 ; C23C8/02 ; C22C38/60 ; H01F1/16 ; C22C38/00 ; C21D8/12 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/12 ; C22C38/16 ; C22C38/28 ; C22C38/34 ; C23F17/00 ; F27B9/04 ; F27D7/06
Abstract:
A nitriding apparatus for manufacturing a grain-oriented electrical steel sheet is provided. The nitriding apparatus includes: a nitriding gas supply pipe for introducing gas including at least ammonia or nitrogen; and a nitriding treatment portion for successively performing high-temperature nitriding and low-temperature nitriding in nitriding treatment. The nitriding treatment portion includes a high-temperature treatment portion for performing the high-temperature nitriding and a low-temperature treatment portion for performing the low-temperature nitriding, and the nitriding gas supply pipe to the high-temperature treatment portion includes a cooling device.
Public/Granted literature
- US20210115549A1 NITRIDING APPARATUS FOR MANUFACTURING A GRAIN-ORIENTED ELECTRICAL STEEL SHEET Public/Granted day:2021-04-22
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