Title:
MECHANICAL STRUCTURAL MEMBER AND PRODUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2023/218975
Kind Code:
A1
Abstract:
Provided is a high-precision mechanical structural member that has excellent quality and resists deformation. A mechanical structural member according to the present invention has grooves (32) and teeth (33) that have been formed by plastic processing and includes a hardened layer (31a) that is formed at the surface of the mechanical structural member by high-frequency quenching and has a uniform martensitic single-phase structure, a core region (31b) that has a sorbitic structure, and a boundary layer (31c) that is formed between the core region (31b) and the hardened layer (31a) and has a mixture of a sorbitic structure and a martensitic structure. The Rockwell hardness of the core region is 13–28 (HRC), the variation in the Rockwell hardness being within 6 (HRC).
Inventors:
SAITO TAKESHI (JP)
Application Number:
PCT/JP2023/016552
Publication Date:
November 16, 2023
Filing Date:
April 26, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
C21D9/32; B21H3/04; B23P15/14; B23P23/04; C21D1/10; C21D9/00
Foreign References:
| JP2003119518A | 2003-04-23 | |||
| JP2015042897A | 2015-03-05 | |||
| JP2003119518A | 2003-04-23 | |||
| JP2013092212A | 2013-05-16 | |||
| JP2022077203A | 2022-05-23 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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