MUMBAI, India, June 6 -- Intellectual Property India has published a patent application (202517048046 A) filed by Nippon Steel Corporation, Tokyo, on May 19, for 'crankshaft and method for producing crankshaft.'
Inventor(s) include Kikuchi, Natsumi; and Abe, Tatsuhiko.
The application for the patent was published on June 6, under issue no. 23/2025.
According to the abstract released by the Intellectual Property India: "Provided is a crankshaft excellent in terms of crack resistance and fatigue strength. The crankshaft has a chemical composition comprising, in terms of mass%, 0.35-0.65% C, 0.01-0.60% Si, 1.00-2.00% Mn, 0.01-0.50% Cr, 0.001-0.050% Al, 0.010-0.100% S, 0.010-0.030% N, 0-0.020% Ti, and Fe and impurities as the remainder, the chemical composition satisfying expression (1). The crankshaft has a hardened layer in at least some of the surface. The hardened layer has a structure including 9.0 vol% or more ferrite, the remainder being martensite and/or bainite. The hardened layer has a Vickers hardness of 520 or greater. (1): ([C]-0.05)/[N]-300 [Ti]=30.0 In expression (1), the C content and the N content, in mass%, are substituted respectively for [C] and [N]."
The patent application was internationally filed on Nov. 28, 2023, under International application No.PCT/JP2023/042472.
Disclaimer: Curated by HT Syndication.
