Title:
CRANKSHAFT AND MANUFACTURING METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2021/172177
Kind Code:
A1
Abstract:
Provided is a crankshaft that has excellent seizing resistance. This crankshaft includes journal parts 11 and pin parts 12 and has on a surface thereof a compound layer containing iron and nitrogen. In the compound layer, in each of the journal parts 11 and pin parts 12, a void area ratio of the thinner region from between a region up to a depth of 3.0 μｍ from the surface and an overall thickness region of the compound layer is 10.0% or less. The journal parts 11 and the pin parts 12 each have a surface shape in which an arithmetic mean height Pa of a cross-section curve is 0.090 μｍ or less.
Inventors:
ABE TATSUHIKO (JP)
OKAWA SATORU (JP)
YUYA MASATO (JP)
OKAWA SATORU (JP)
YUYA MASATO (JP)
Application Number:
PCT/JP2021/006247
Publication Date:
September 02, 2021
Filing Date:
February 19, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D9/30; C21D1/06; C22C38/00; C22C38/60; C23C8/26; C23C8/80; F16C3/06
Domestic Patent References:
| WO2019098340A1 | 2019-05-23 |
Foreign References:
| JP2001232546A | 2001-08-28 | |||
| JP2009275645A | 2009-11-26 | |||
| JP2003277882A | 2003-10-02 |
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
Download PDF:
Previous Patent: SOLID-STATE IMAGING DEVICE AND ELECTRONIC APPARATUS
Next Patent: ELECTRONIC COMPONENT MOUNTING PACKAGE AND ELECTRONIC DEVICE
Next Patent: ELECTRONIC COMPONENT MOUNTING PACKAGE AND ELECTRONIC DEVICE