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    • 3. 发明公开
    • VERFAHREN ZUM LASERSCHWEISSEN EINES ODER MEHRERER WERKSTÜCKE AUS HÄRTBAREM STAHL IM STUMPFSTOSS
    • 方法的一个或多个树桩硬化钢SHOCK的组成部分激光焊接
    • EP3107681A1
    • 2016-12-28
    • EP15703535.3
    • 2015-01-29
    • WISCO Tailored Blanks GmbH
    • BREUER, ArndtBOTH, Christian
    • B23K26/32B23K26/26
    • B23K26/26B23K26/123B23K26/14B23K26/32B23K35/0255B23K35/0261B23K35/3053B23K35/3066B23K35/3073B23K35/3086B23K35/3093B23K2101/006B23K2103/04C22C38/002C22C38/02C22C38/06C22C38/22C22C38/28C22C38/32C22C38/38C22C38/44C22C38/58
    • The invention relates to a method for laser welding one or more workpieces made of press-hardening steel, in particular manganese-boron steel, in a butt joint, wherein the workpiece or the workpieces (1, 2) have a thickness between 0.5 and 1.8 mm and/or a thickness jump (d) between 0.2 and 0.4 mm arises at the butt joint (3) and wherein, during the laser welding, filler wire (10) is fed into the molten pool (8) produced by means of at least one laser beam (6), wherein the molten pool (8) is produced exclusively by the at least one laser beam (6). According to the invention, in order to ensure that the weld can be reliably hardened into a martensitic microstructure during the hot forming (press hardening), the filler wire (10) contains at least one alloying element from the group comprising manganese, chromium, molybdenum, silicon, and/or nickel, which alloying element promotes the formation of austenite in the molten pool (8) produced by means of the laser beam (6), wherein said at least one alloying element is present in the filler wire (10) at a mass fraction that is greater than the mass fraction of the at least one alloying element in the press-hardening steel of the workpiece or the workpieces (1, 2) by at least 0.1 wt%, and wherein the workpiece used or the workpieces (1, 2; 1, 2') used are non-coated or the coating thereof is partially removed.
    • 用于激光焊接的一个或在对接接头制成压硬化钢的多个工件,worin工件或工件的方法,具有的厚度为0.5和1.8毫米之间,和/或在0.2和0.4毫米之间的厚度的跳跃发生在 对接接头,和worin激光焊接用焊丝的进给入熔池,所有仅由至少一个激光束产生开展。 填充焊丝含有选自锰,铬,钼,硅和/或镍,其中合金元素促进奥氏体的在由激光束所产生的熔融浴的形成,worin所述至少一种合金元素的至少一种合金元素 存在于一个质量百分比大至少0.1重量%,比工件或工件和所使用的工件或工件的钢填充焊丝是未涂覆的或涂覆其被部分地去除。