MACHINE STRUCTURAL MEMBER AND METHOD FOR MANUFACTURING SAME

Title:

MACHINE STRUCTURAL MEMBER AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2023/218974

Kind Code:

A1

Abstract:

Provided is a machine structural member that can suppress deformation and has high accuracy and excellent quality. This machine structural member (triangular screw shaft) (31), in which grooves (32) and teeth (33) are formed by plastic processing and which has a cured layer (31a) on the surfaces of the teeth (33), has a sorbite structure, and the Rockwell hardness in a region (P) excluding the cured layer (31a) is 13-28 (HRC). Furthermore, the variation in Rockwell hardness in the region (P) excluding the cured layer (31a) is within 6 (HRC).

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Inventors:

SAITO TAKESHI (JP)

Application Number:

PCT/JP2023/016551

Publication Date:

November 16, 2023

Filing Date:

April 26, 2023

Export Citation:

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Assignee:

NSK LTD (JP)

International Classes:

C21D9/32; B21H3/04; B23P15/14; B23P23/04; C21D9/00

Foreign References:

JP2003119518A	2003-04-23
JP2015042897A	2015-03-05
JP2003119518A	2003-04-23
JP2013092212A	2013-05-16
JP2022077202A	2022-05-23

Attorney, Agent or Firm:

EIKOH, P.C. (JP)

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