Zn alloy plated steel sheet having excellent phosphatability and spot weldability and method for manufacturing same
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United States of America
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Jan 28, 2020
Grant Date -
Apr 4, 2019
app pub date -
Dec 24, 2015
filing date -
Dec 24, 2015
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Abstract
A Zn alloy plated steel sheet having excellent phosphatability and spot weldability and a method for manufacturing the same are provided. In the Zn alloy plated steel sheet including a base steel sheet and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.5-2.8%, Mg: 0.5-2.8%, and a remainder of Zn and inevitable impurities, and a cross-sectional structure of the Zn alloy plating layer includes, by area percentage, more than 50% of a Zn single phase structure and less than 50% of a Zn—Al—Mg-based intermetallic compound. A surface structure of the Zn alloy plating layer includes, by area percentage, 40% or less of a Zn single phase structure and 60% or more of a Zn—Al—Mg-based intermetallic compound.
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