The invention discloses a device for eliminating
welding cracks and pores of aluminum-steel
dissimilar metal. The device comprises a casing, a
welding chamber, a far-
infrared heater, a
water storage chamber and a protective seat, wherein the
water storage chamber is arranged at the inner bottom end of the casing; the casing above the
water storage chamber is internally provided with the
welding chamber. According to the device disclosed by the invention, a
copper sheet is arranged between a steel plate and an aluminum
alloy plate; the aluminum
alloy plate and the steel plate are respectively contacted with a material guiding
pipe by using the
copper sheet; on the one hand, the condition that the steel plate and the aluminum
alloy plate are contacted and react to generate a brittle compound in the heating process is avoided by use of the limiting action of the
copper sheet; on the other hand, the copper sheet realizes a heat conduction effect, and conducts the heat produced by a heating
barrel to welding ends of the aluminum alloy plate and the steel plate separately for preheating the steel plate and the aluminum alloy plate, so that the phenomenon that the welding quality is affected as bubbles are produced because of nonuniform heating in the
welding process is reduced; a
weld seam is integrally welded after the copper sheet is heated and melted so as to improve the welding effect.