MUMBAI, India, Aug. 29 -- Intellectual Property India has published a patent application (202517076385 A) filed by Nippon Piston Ring Co. Ltd., Saitama, Japan, on Aug. 11, for 'valve seat formed of iron-based sintered alloy for internal combustion engines and method for producing same.'
Inventor(s) include Ikemi Satoshi; and Sato Katsuaki.
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 valve seat which is formed of an iron-based sintered alloy and has excellent wear resistance and excellent radial crushing strength. The valve seat is a sintered body having a two-layer structure, the sintered body being formed of an iron-based sintered alloy and being obtained by sintering a functional member-side layer and a supporting member-side layer in an integrated manner. The functional member-side layer is a sintered body that is formed of an iron-based sintered alloy which comprises, in a matrix phase that is composed of a fine carbide precipitation phase, 5.0-30.0% by area of a high alloy phase, a structure in which 10.0-40.0% by area of Si-Cr-Mo-Ni system Fe-based intermetallic compound particles having a hardness of 700-1,300 HV and 0-4.0% by area of solid lubricant particles are dispersed, and a matrix part which has a composition that contains, in mass%, 0.50-2.80% of C, 1.80% or less of Si, 2.50% or less of Mn, 2.00-7.00% of Cr, 3.00-25.00% of Mo, 2.00-8.00% of Ni, 0-10.00% of Co, 0.50-4.00% of V, 4.00-10.00% of W and 0-2.00% of Si, with the balance being made up of Fe. Consequently, the present invention can provide a valve seat which has excellent radial crushing strength and excellent wear resistance."
The patent application was internationally filed on Jan. 19, 2024, under International application No.PCT/JP2024/001380.
Disclaimer: Curated by HT Syndication.
