MUMBAI, India, Aug. 29 -- Intellectual Property India has published a patent application (202517076383 A) filed by Nippon Piston Ring Co. Ltd., Saitama, Japan, on Aug. 11, for 'iron-based sintered alloy valve seat 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 an iron-based sintered alloy valve seat. The present invention is a sintered body of an iron-based sintered alloy having a two-layer structure in which a functional-member-side layer and a support-member-side layer are integrally sintered. In the functional-member-side layer, dispersed in a base phase constituted by a fine carbide precipitated phase are: a high alloy phase, in an amount of 5.0-30.0% by area ratio; Si-Cr-Mo or Si-Cr-Mo-Ni Co-based intermetallic compound particles that have a Vickers hardness of 600-1,200 HV, in an amount of 10.0-40.0%; and solid lubricant particles in an amount of 0-4.0%. In the sintered body of the iron-based sintered alloy, a base part has a composition containing, in terms of mass%, 0.50-2.80% C, not more than 1.80% Si, not more than 2.50% Mn, 3.00-11.00% Cr, 3.00-17.00% Mo, 1.00-8.50% Ni, 5.00-30.00% Co, 0.50-4.00% V, 4.00-10.00% W, and 0-2.00% S. Thus, it is possible to provide a valve seat that has excellent radial crushing strength and excellent wear resistance as compared to conventional valve seats."
The patent application was internationally filed on Jan. 19, 2024, under International application No.PCT/JP2024/001385.
Disclaimer: Curated by HT Syndication.
