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Process of producing one-side alloyed galvanized steel strip

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posted on 2016-06-07, 00:00 authored by James A. Kargol, James B. Cundiff, Larry H. Lindberg, Peter A. Klobuchar, William C. Sievert
A process of consistently producing in an economical manner a galvanized steel strip having on one side a thin uniform surface coating of zinc-iron intermetallic compounds containing at least 6 percent iron and being free of metallic zinc and having on the other side a formable metallic zinc surface coating which is formed by continuously immersing the steel strip in a hot-dip zinc coating bath in which the temperature of the steel strip and the coating bath are controlled within a limited range to avoid forming an exclusively thick zinc iron intermetallic layer during hot-dip coating which interferes with good formability of the metallic zinc surface coating and controlling the thickness and uniformity of the zinc coating which is transformed into the coating formed of zinc-iron intermetallic compounds within a range of 10 to 30 g/m.sup.2 while maintaining the variation in coating weight within a range of from 3 to 6 g/m.sup.2 and heating the strip rapidly to a peak temperature of between about 482.degree. C. and 524.degree. C. within a period of 3 to 5 seconds and allowing the strip to cool below the melting point of the zinc coating.

History

Patent Number

US 4171392 B2

Other Application

05/958,800

Inventor

James B. Cundiff James A. Kargol Peter A. Klobuchar Larry H. Lindberg William C. Sievert

Inventor from Local Institution

James A. Kargol

Assignee

Inland Steel Company (Chicago, IL)

Date Modified

2016-06-07

Language

  • English

Claims

5

Publisher

United States Patent and Trademark Office

Cooperative Patent Classification Codes

C23C 2/006 (20130101)

Contributor

James A. Kargol|

International Patent Classification Codes

C23C 2/00 (20060101); C23C 001/02 ()

US Patent Classification Codes

148/533; 427/321; 427/349; 427/433; 428/659;

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