C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/4
C22C 1/08 (2006.01) C23C 10/56 (2006.01)
Patent
CA 2152216
In manufacturing a corrosion-resistant metallic porous member having high Cr content by diffusion process in which the material is heat-treated, a plurality of heat cycles are used to achieve uniform Cr content in the thickness direction. Metallic porous body of Ni, Fe, Ni-Cr or Fe-Cr is buried in a powder of Al, Cr and NH4Cl. Inert gas such as Ar and H2 is introduced and the porous body is heat treated at 800-1100°C. In the heat treatment, at least two temperature-increase and temperature-decrease steps are included.
Ihara Tomohiko
Okamoto Satoru
Tsubouchi Toshiyasu
Fetherstonhaugh & Co.
Sumitomo Electric Industries Ltd.
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