C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/25
C21D 9/52 (2006.01) B23K 35/40 (2006.01) C23C 8/14 (2006.01) C23C 8/18 (2006.01)
Patent
CA 1227727
ABSTRACT A method of treating the outer surface of a steel shape to impart thereto a surface finish consisting essentially of magnetite, wherein said method comprises, in the indicated order, the steps of: (1) removing all foreign materials from the outer surface of the steel shape; (2) immersing the steel shape in an atmosphere that includes oxygen; and (3) heating the steel shape to a temperature of between 300°C and 800°C while immersed in said atmosphere. The steel shape may subsequently be quenched. This method imparts rust resistance to the steel shape, and when used on welding wire used in arc welding, results in a cleaner weld that can be laid down at a faster rate. A preferred product obtained from the method is also described.
468342
Johnsen Hawk
Johnsen Kaare
Johnsen Hawk
Johnsen Kaare
Ridout & Maybee Llp
LandOfFree
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