Resistance spot welding method and manufacturing m
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专利名称：Resistance spot welding method and
manufacturing method of resistance spot
welded joint
发明人：遠藤 玲子,松下 宗生,松田 広志,池田 倫正
申请号：JP2019153415
申请日：20190826
公开号：JP2020040122A
公开日：
20200319
专利内容由知识产权出版社提供
专利附图：
摘要：Problem to be solved: to provide a resistance spot welding method capable of reducing segregation of nugget ends in Medium Mn high strength steel sheets. A main current supplying process for forming a weld portion with a predetermined current value IW (KA) andAfter the main energization processCooling process for cooling a
predetermined cooling time TCP (MS) weldsA temperature rise process in which the welding part is energized for a predetermined energizing time TP (MS) with a
predetermined current value IP (KA) andThe transition process in which the energizing current is continuously decreased from the current value IP (KA) to the predetermined current value IPM (KA) during a predetermined down slope energization time period
TPMA (MS), and \/ or the constant current value IPM (KA) is held by a predetermined current value IPM (KA) to maintain the energization of the welding portion for a predetermined energizing time TPM A segregated relaxation heat treatment step having a process is providedThe total time of energization in the heat treatment after segregation is controlled to a predetermined time.At least one of the steel platesIt is a medium Mn high strength steel plate.Diagram
申请人：ＪＦＥスチール株式会社
地址：東京都千代田区内幸町二丁目２番３号
国籍：JP
代理人：磯村 哲朗,熊坂 晃,坂井 哲也,森 和弘
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