Nippon Steel. has filed a patent for a non-oriented electrical steel sheet with specific chemical composition and tensile strength of 550 MPa or more. The sheet’s unique properties are measured through Auger electron spectroscopy, ensuring high performance in electrical applications. GlobalData’s report on Nippon Steel gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Nippon Steel, Vehicle camshaft manufacturing was a key innovation area identified from patents. Nippon Steel's grant share as of January 2024 was 24%. Grant share is based on the ratio of number of grants to total number of patents.
The patent application (Publication Number: US20240039347A1) discloses a non-oriented electrical steel sheet with specific chemical composition criteria to achieve a tensile strength of 550 MPa or more. The sheet includes elements such as C, Si, Mn, P, and various trace elements within defined ranges. Additionally, the patent claims a specific ratio between peak-to-peak heights of Fe and P when measuring crystal grain boundaries through Auger electron spectroscopy. The patent also covers methods for producing the steel sheet, including hot rolling, cold rolling, and final annealing processes with specific temperature ranges and cooling rates to ensure desired properties.
Furthermore, the patent extends to the use of the non-oriented electrical steel sheet in an electric motor's stator core, with similar chemical composition requirements and tensile strength specifications. The patent outlines a ratio between peak-to-peak heights of Fe and P for crystal grain boundaries and inside crystals when measuring through Auger electron spectroscopy. The production method for the electric motor involves processing the steel sheet into a stator core shape and annealing the material within specific temperature and cooling rate parameters. Overall, the patent aims to provide a high-strength non-oriented electrical steel sheet and stator core for efficient electric motor applications, emphasizing precise chemical compositions and production processes to achieve desired mechanical properties.
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