Title:
METAL COMPONENT AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/106233
Kind Code:
A1
Abstract:
Provided is a metal component having a surface layer that is resistant to heat/corrosion and wear, the surface layer having high durability with respect to repeated thermal stress. The present invention comprises a parent material that is an iron-based metal or a nickel-based metal, and a surface improvement layer formed on the surface of the parent material. The surface improvement layer is configured so as to include a chromium compound layer that is present on the surface side, and a deposition layer that is present between the chromium compound layer and the parent material, the deposition layer being such that the chromium compound is deposited in a parent-material metal constituting the parent material. The thermal expansion coefficients of these layers increases sequentially from the surface toward a deep section such that the thermal expansion coefficient of the chromium compound layer is less than that of the deposition layer, which in turn is less than that of the parent material. Specifically, the difference in thermal expansion coefficient between each of the layers is low. This makes it possible to raise the durability of the surface layer with respect to repeated thermal stress and to maintain the characteristics of heat/corrosion resistance and wear resistance of the surface layer. There are many environments and applications in which the present invention can be used.
Inventors:
FUJIKAWA HISAO (JP)
WATANABE TAKANORI (JP)
WATANABE HIROYUKI (JP)
MIYASHITA HIROKI (JP)
WATANABE TAKANORI (JP)
WATANABE HIROYUKI (JP)
MIYASHITA HIROKI (JP)
Application Number:
PCT/JP2020/005455
Publication Date:
June 03, 2021
Filing Date:
February 13, 2020
Export Citation:
Assignee:
AIR WATER NV INC (JP)
International Classes:
C23C8/24; C23C10/38; C23C28/00
Foreign References:
| JP2008144654A | 2008-06-26 | |||
| JP2010007134A | 2010-01-14 | |||
| JPS57134551A | 1982-08-19 | |||
| JP2017043837A | 2017-03-02 | |||
| JP2000178711A | 2000-06-27 |
Attorney, Agent or Firm:
MORIMOTO Naoyuki (JP)
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