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AssigneeJfe Steel Corporation
InventorsChikaumi SAWANISHI, Tomomi KANAZAWA, Nao KAWABE, Katsutoshi TAKASHIMA, Shunsuke YAMAMOTO
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A resistance spot welding method is for joining a plurality of steel sheets together by clamping a sheet assembly, consisting of the plurality of overlapping steel sheets, between a pair of welding electrodes, and applying a current to the sheet assembly while applying pressure thereon. The method includes a holding step of holding the welding electrodes after completion of the application of current. In the holding step, a pressure holding time is controlled within a predetermined time range defined by a particular relational expression using the C content, the Si content, and the Mn content of a steel sheet, the thickness of a decarburized layer per one surface of the steel sheet, and the amount of internal oxidation per one surface of the steel sheet.
A resistance spot welding method for joining a plurality of steel sheets together by clamping a sheet assembly, consisting of the plurality of overlapping steel sheets, between a pair of welding electrodes, and applying a current to the sheet assembly while applying pressure thereon, the method comprising;
Dependencies are inferred from the claim text.