Title:
PLATED MEMBER AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2024/053640
Kind Code:
A1
Abstract:
A plated member, the outer surface of which has a plating film thereon which contains at least chromium, carbon and oxygen and has chromium which uses a trivalent chromium bath as a main component thereof, wherein: the plating film contains chromium in the amount of 60 at% or more, and carbon in the amount of 1-30 at%; the indentation hardness of the outer surface is at least 11.1 GPa; and the degree of crystallization calculated on the basis of formula (1) and the peak integrated intensity ratio of a measured value obtained by X-ray diffraction measurement is at least 5%. Formula (1): degree of crystallization (peak integrated intensity ratio)={(crystalline)/(crystalline+amorphous)}×100%. Herein, the indentation hardness expresses the value of an instrumented indentation hardness measurement via a nano-indentation method (ISO14577), and the integrated intensity ratio in formula (1) expresses a value obtained in X-ray diffraction (XRD) analysis with 2θ being 30-60°, the crystalline half-value width being <3 and the amorphous half-value width being ≥3.
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Inventors:
OMATA YASUHISA (JP)
HOSHINO AKIHITO (JP)
NAKANO HIROSHI (JP)
HOSHINO AKIHITO (JP)
NAKANO HIROSHI (JP)
Application Number:
PCT/JP2023/032351
Publication Date:
March 14, 2024
Filing Date:
September 05, 2023
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
C25D7/00; C25D3/06; F16J7/00
Domestic Patent References:
| WO2022044451A1 | 2022-03-03 | |||
| WO2012133613A1 | 2012-10-04 |
Foreign References:
| JP2020158872A | 2020-10-01 | |||
| US20080166531A1 | 2008-07-10 | |||
| US20170159198A1 | 2017-06-08 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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