Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1996-09-11
1999-03-16
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
427253, 428610, 428667, C23C 800
Patent
active
058824391
ABSTRACT:
To provide heat-resistant alloy members that maintain the resistance to corrosion at high temperature of the chromized layer formed on Ni- or Co-base heat-resistant alloys and which yet are improved in various mechanical properties. The improved Ni- or Co-base heat-resistant alloy member having a chromized layer that is characterized by having a chromium concentration of 25-80% and a thickness of 10-100 .mu.m. This member is produced by controlling both the vapor pressure of a chromium halide being used in chromization and the temperature therefor in such a way that the chromized layer being formed is adjusted to have a chromium concentration and a thickness within the ranges specified above.
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Metallurgical Transactions A, vol. 15A, Jan. 1984, G.A. Whitlow, et al., "The Effects of a Liquid Sulfate/Chloride Environment on Superally Stress Rupture Properties at 1300 F (704.degree. C)" pp. 23-28.
Takasago Technical Institute, Technical Headquarters, Mitsubishi Heavy Industries, Ltd., vol. 31, No. 4, 1982, Yoshio Harada, "Protective Coatings Against High Temperature Corrosion", pp. 281-292, with English Abstract).
Takasago Technical Institute, Mitsubishi Heavy Industries, Ltd., vol. 31, No. 3, 1982, Masaharu Nakamori, et al., "Protection of High Temperature Corrosion of Superalloys by the Treatment of Co Cr Al Y Ion Plating", pp. 202-207, with English Abstract.
Harada Yoshio
Kawasaki Masamichi
Nagahara Hisamichi
Nakahama Syuhei
Ebara Corporation
Koehler Robert R.
Simmons David A.
Tocalo Co., Ltd.
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