Method for producing dual-phase and zinc-aluminium coated...

C - Chemistry – Metallurgy – 21 – D

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148/40, 117/94

C21D 1/48 (2006.01) C21D 9/52 (2006.01) C23C 2/06 (2006.01)

Patent

CA 1196557

Abstract of the Disclosure The invention relates to a method for producing coated high strength low alloy steel. A strip of steel is cleaned from rolling oil, is heated to the temperature range A1 to A3 in a protective atmosphere, is soaked and subsequently quenched in a zinc-aluminum bath for a short time sufficient to adhere a zinc coating to the steel surface, whereafter the steel strip is rapidly cooled to a temperature below 300°C, to obtain a dual-phase steel structure.

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