05326648 is referenced by 7 patents and cites 7 patents.

A zinc or zinc-alloy plated steel sheet having an improved weldability and plating properties, as well as a method for making the same is provided. Even when the substrate steel sheet is the one which is difficult to deposit a zinc or zinc-alloy layer by conventional methods, such as an extra low carbon steel sheet, the present invention enable a reliable production of a galvanized steel sheet suffering from no plating failure or insufficient adhesion as well as a reliable production of a galvannealed steel sheet suffering from no plating failure or streaking of the alloyed layer.

The zinc or zinc-alloy plated steel sheet having improved weldability comprises an extra low carbon steel sheet, an iron-carbon plated layer or a carbon-rich layer generated by diffusion of the iron-carbon plated layer on at least one major surface of the extra low carbon steel sheet, and a zinc or zinc-alloy plated layer on the iron-carbon plated layer or the carbon-rich layer.

The zinc or zinc-alloy plated steel sheet having improved weldability and/or plating properties is produced by depositing on the steel sheet an iron-carbon plated layer having a carbon content of from 0.01% by weight to 10% by weight to a coating weight of from 0 01 g/m.sup.2 to 10 g/m.sup.2, optionally annealing the iron-carbon plated steel sheet, and depositing a zinc or zinc-alloy plated layer, preferably by galvanizing or galvannealing, on the annealed steel sheet.

Title
Surface-treated steel sheet having improved weldability and plating properties, and method for producing the same
Application Number
7/658084
Publication Number
5326648
Application Date
February 20, 1991
Publication Date
July 5, 1994
Inventor
Hajime Kimura
Chiba
JP
Kouichi Yasuda
Chiba
JP
Akira Yasuda
Chiba
JP
Nobuyuki Morito
Chiba
JP
Yasuji Uesugi
Chiba
JP
Chiaki Kato
Chiba
JP
Agent
Dvorak and Traub
Assignee
Kawasaki Steel Corporation
JP
IPC
B32B 15/18
B32B 5/14
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