ZINC PLATED STEEL SHEET HAVING EXCELLENT FATIGUE STRENGTH OF ELECTRICAL RESISTANCE SPOT WELDS, AND MANUFACTURING METHOD THEREOF
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United States of America Patent
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Issued Date -
Sep 5, 2024
app pub date -
May 10, 2024
filing date -
Dec 3, 2019
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Abstract
The present disclosure relates to a zinc plated steel sheet having excellent fatigue strength of electrical resistance spot welds and a method for manufacturing the same. According to an aspect of the present disclosure, a zinc plated steel sheet includes a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet, wherein a concentration profile of one or two of oxygen, and silicon and manganese measured in a depth direction from the surface of the base steel sheet has a maximum point in the depth direction from the surface, and an absolute value of a difference between a depth at which the maximum point of the concentration profile of oxygen is formed and a depth at which the maximum point of the concentration profile of one of silicon and manganese is formed is 0.5 μm or less.
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