The invention discloses a method for regulating an
intermetallic compound for a dissimilar material overlap joint through
laser-arc double-sided
welding, relates to a method for overlapping and
welding dissimilar materials, and aims to solve the technical problems that the produced
intermetallic compound has hardly controlled thickness and a joint has poor
mechanical property in the process of overlapping and
welding the dissimilar materials. The method comprises the following steps of: prearranging
brazing filler metals between overlap joints of the dissimilar materials, respectively arranging
laser beams and arcs on two sides of the overlap joints and symmetrically heating and welding simultaneously, wherein the
laser beams on the side of low-
melting point materials are subjected to
deep penetration welding, and the arcs on the side of high-
melting point materials are brazed with the
brazing filler metals. In the method, the
laser beams are arranged on the side of the low-
melting point materials to be subjected to
deep penetration welding so as to be subjected to
fusion welding with the
brazing filler metals, and the arcs are arranged on the side of the high-melting point materials to be subjected to heat conduction welding so as to be brazed with the brazing filler metals; and the optimized interlayer reaction thickness is realized and excellent joint performance is achieved by controlling
energy matching under the coaction of the laser and the arcs. The method is applied to the field of dissimilar material welding.