The invention discloses a method for manufacturing a
metal composite plate, and belongs to the technical field of
metal composite plate manufacturing technology. The method comprises the following steps that firstly, the rusty layer and the
oxide layer of
multiple layer metal and parent metal are removed, the corners at the two ends and the middle of the metal layer placed on the upper face in the process of heating are respectively drilled, and each position of the corners at the two ends and the middle of the metal layer is provided with a vent hole with the
diameter ranging from 4mm to 8mm; secondly, the
multiple layer metal and the parent metal are stacked, and the periphery of the contact face is welded and sealed; thirdly, the air inside the contact
face space is completely exhausted by injecting
argon through the vent hole in one end, and the vent holes in the two ends are sealed; fourthly, the metal
composite plate is placed inside a
heating furnace to be heated according to the production requirements for the composite layer metal; fifthly, the metal composite plate is rolled on a
rolling mill; sixthly, if the
multiple layer metal needs to be later processed in a heat mode, the composite plate is processed in the heat mode according to the demands. By means of the method, the oxidation of the contact face of the metal composite plate can be reduced, the shearing strength of the contact face of the metal composite plate is improved, vacuumizing is not needed, operation is easy, and cost is low.