Title:
金属の表面改質方法および金属製品
Document Type and Number:
Japanese Patent JP6637231
Kind Code:
B2
Abstract:
Provide a metal surface reforming method enabling metallic products with superior characteristics such as surface hardness, heat resistance, corrosion resistance, high temperature oxidation, high temperature corrosion, and environmental corrosion and the like. Halogenation treatment of heating and retaining a base material in an atmosphere containing a halogen based gas is performed on a base material of iron based metal or nickel based metal, then nitride processing of heating and retaining the halogenated base material described above in an atmosphere containing a nitrogen source gas is performed, then chromizing treatment is performed by placing the nitrided base material in a powder containing metal chromium powder to form a surface reformed layer on the base material described above. These metallic products obtained have high hardness, superior heat resistance and corrosion resistance, and exhibit superior performance in high temperature oxidation, high temperature corrosion, erosion, and cavitation and the like environments. Further, the metallic products described above exhibit superior performance in acid or alkali environments, neutral environments, and corrosive environments such as chlorides like salt water.
Inventors:
Nao Fujikawa
Atsushi Miyamoto
Morihiro Fujita
Atsushi Miyamoto
Morihiro Fujita
Application Number:
JP2014206236A
Publication Date:
January 29, 2020
Filing Date:
October 07, 2014
Export Citation:
Assignee:
Air Water nv Co., Ltd.
International Classes:
C23C10/40; C21D1/06; C23C8/02; C23C8/24; C23C8/26; C23C10/38; C23C28/00
Domestic Patent References:
| JP2004167505A | ||||
| JP1177354A | ||||
| JP63274753A | ||||
| JP2013185220A | ||||
| JP57134551A | ||||
| JP2008150706A | ||||
| JP5558366A | ||||
| JP3501979A |
Foreign References:
| KR1020000031821A |
Attorney, Agent or Firm:
Naoyuki Morimoto