PRE-COATED STEEL SHEET COMPRISING AN ADDITIONAL COATING FOR INCREASING THE MECHANICAL STRENGTH OF THE WELD METAL ZONE OF A WELDED STEEL PART PREPARED FROM SAID PRECOATED SHEET

A pre-coated steel sheet wherein at least a region at the periphery (7) of at least one (6a,6b) of the opposite faces (6a,6b) of said pre-coated sheet (1,1′) is coated with an additional coating (8) selected for increasing the vapor pressure between the pre-coating (2) and said additional coating (8...

Full description

Saved in:
Bibliographic Details
Main Authors Adrian Piotr GERLICH, Yunhong (Norman) ZHOU, Shehryar KHAN, Elliot BIRO, Andrew MACWAN, Dulal Chandra SAHA
Format Patent
LanguageEnglish
Published 26.04.2023
Online AccessGet full text

Cover

More Information
Summary:A pre-coated steel sheet wherein at least a region at the periphery (7) of at least one (6a,6b) of the opposite faces (6a,6b) of said pre-coated sheet (1,1′) is coated with an additional coating (8) selected for increasing the vapor pressure between the pre-coating (2) and said additional coating (8) during a laser welding method up to a critical pressure at which the pre-coating (2) is ejected away from the weld (14). Preferably, the vaporization temperature of the additional coating (8) is greater than the vaporization temperature of the pre-coating (2) and the additional coating includes gammagene elements like carbon and/or nickel. A steel part obtained by laser welding, preferably butt laser welding, of at least a first and second pre-coated steel sheet (1,1′) as above indicated is also provided.
Bibliography:Application Number: ZA20220005740