Title:
MECHANICAL COMPONENT, ROLLING BEARING, AND BALL SCREW
Document Type and Number:
WIPO Patent Application WO/2024/075486
Kind Code:
A1
Abstract:
This mechanical component is made of steel that is subjected to quenching and tempering, the mechanical component comprising a carbonitrided layer on the surface thereof. The steel contains 0.13-0.58 mass% inclusive of C, 0.15-0.35 mass% inclusive of Si, 0.6-1.1 mass% inclusive of Mn, less than 0.025 mass ppm of P, less than 0.025 mass ppm of S, 1.2 mass% or less of Cr, 0.3 mass% or less of Mo, 0.25 mass% of V, and 0.25 mass% of Ni, the balance being Fe and unavoidable impurities. The average carbon concentration in the steel on the surface is 0.6 mass% or greater. The nitrogen concentration in the steel on the surface is 0.10 mass% or greater.
Inventors:
MIZUTA KOHEI (JP)
FUJIMURA NAOKI (JP)
YAMADA MASAHIRO (JP)
FUJIMURA NAOKI (JP)
YAMADA MASAHIRO (JP)
Application Number:
PCT/JP2023/033507
Publication Date:
April 11, 2024
Filing Date:
September 14, 2023
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/64; C21D1/06; C21D9/36; C21D9/40; C22C38/00; C22C38/46; F16C19/06; F16C33/32; F16C33/62; F16H25/22
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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