PROJECTION WELDED JOINT AND PROJECTION WELDING METHOD
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Nov 25, 2022
filing date -
Nov 25, 2022
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Abstract
A welded joint formed by performing projection welding on a high-strength coated steel sheet and a nut, includes a content of solid solution Mn in a first region in a surface layer of the steel sheet on an outermost periphery of a weld is 40% or less of a content of solid solution Mn in a second region in a central region in a thickness direction of the steel sheet on the outermost periphery of the weld, and a content of solid solution Mn in a third region in the surface layer of the steel sheet on an innermost periphery of the weld is 40% or less of a content of solid solution Mn in a fourth region in the central region in the thickness direction of the steel sheet on the innermost periphery of the weld.
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