Member having composite coating and process for producing the same
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United States of America Patent
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Oct 10, 2000
Grant Date -
N/A
app pub date -
Sep 3, 1997
filing date -
Mar 8, 1995
priority date (Note) -
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Abstract
A composite steel sheet including a steel base member; an undercoat having opposed surfaces and a thickness of 10-750 .mu.m obtained by spraying one or more spraying materials selected from metals, non-oxide ceramics, oxide ceramics and cermets onto the steel base member. The undercoat has an oxide layer of not less then 0.5 .mu.m in thickness on one of the opposed surfaces positioned away from said steel base member. A fired topcoat is formed on the oxide layer of the undercoat from a vitreous coating having a linear expansion coefficient of 4-11.times.10.sup.-6 /.degree.C.
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