MUMBAI, India, Aug. 29 -- Intellectual Property India has published a patent application (202517076304 A) filed by Nippon Steel Corporation, Tokyo, on Aug. 11, for 'steel sheet and manufacturing method therefor.'
Inventor(s) include Miyakawa, Taku; and Yokoyama, Takafumi.
The application for the patent was published on Aug. 29, under issue no. 35/2025.
According to the abstract released by the Intellectual Property India: "The present invention provides a steel sheet having improved bendability after plastic working and excellent tensile strength, and also provides a manufacturing method therefor. A steel sheet according to the present invention is characterized by exhibiting a tensile strength of 1180 MPa or more, and having a prescribed chemical composition and steel structure, wherein the surface layer portion of the steel sheet has a deboronized layer where the luminescence intensities B30, B140, and B150 of B, as measured in the depth direction from the steel sheet surface by high-frequency glow discharge optical emission spectrometry, at the depth positions of 30 m, 140 m, and 150 m from the steel sheet surface satisfy B30/B1500.90 and 0.90=B140/B150=1.10, and in the surface layer portion of the steel sheet, the luminescence intensities C30, C140, and C150 of C, as measured in the depth direction from the steel sheet surface by high-frequency glow discharge optical emission spectrometry, at the depth positions of 30 m, 140 m, and 150 m from the steel sheet surface satisfy C30/C150=0.50 and 0.90=C140/C150=1.10."
The patent application was internationally filed on Nov. 07, 2023, under International application No.PCT/JP2023/040057.
Disclaimer: Curated by HT Syndication.
