C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/74.5
C23C 10/40 (2006.01) C22C 38/12 (2006.01) C23C 10/10 (2006.01) C23C 10/32 (2006.01)
Patent
CA 1039128
ABSTRACT An improved flat rolled substrate for preparing chromized steel is provided which consists essentially of a flat rolled plain low carbon columbium treated steel initially having a total carbon content of at least 0.03% and containing about 0.03-0.15% columbium. The carbon content of the steel substrate is partially stabilized whereby a controlled portion of the carbon is free to diffuse upon heating to an elevated chromizing temperature. The carbon content which is free to diffuse, the columbium content, and the thickness of the substrate are carefully correlated whereby the overall quality of the chromized product prepared therefrom may be controlled and maintained at optimum levels. The invention further provides a novel process for preparing chromized steel which may, if desired, employ the steel substrate of the invention, and the improved chromized steel products prepared thereby.
206816
Na
National Steel Corporation
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