Title:
CASTING HAVING AN ALUMINA BARRIER LAYER ON THE SURFACE, AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JP2018076555
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a casting and a production thereof capable of forming a metal oxide stably at a high area ratio on the surface.SOLUTION: A method according to the invention for forming an alumina barrier layer on the surface on a casting is a method for forming an alumina barrier layer containing an Al oxide on the surface of a casting containing Cr: 15% or more, Ni:18% or more, and Al: 2.0-4.0%. The method comprises: a surface processing step of subjecting said casting to a surface treatment and causing the surface of said casting to have an arithmetic average roughness (Sa) of a three-dimensional surface roughness of 1.5≤Sa≤5.0, and a degree of deviation (Ssk) of |Ssk|≤0.30; and a step of heating said surface-processed casting thereby to form an alumina barrier layer containing an AI oxide on the surface of the casting.SELECTED DRAWING: Figure 2
Inventors:
MATSUBARA MOTOYUKI
HASHIMOTO KUNIHIDE
YAMAGUCHI HIROSHI
TOMITA MASAYUKI
HASHIMOTO KUNIHIDE
YAMAGUCHI HIROSHI
TOMITA MASAYUKI
Application Number:
JP2016219087A
Publication Date:
May 17, 2018
Filing Date:
November 09, 2016
Export Citation:
Assignee:
KUBOTA KK
International Classes:
C23C8/14; B22D29/00; B23K35/30; C22C19/05; C22C38/00; C22C38/40
Domestic Patent References:
| JP2013198917A | 2013-10-03 | |||
| JP2014218728A | 2014-11-20 | |||
| JP2011204723A | 2011-10-13 |
Foreign References:
| WO2010113830A1 | 2010-10-07 |
Attorney, Agent or Firm:
Maruyama International Patent Office