Preparation method of hard alloy and carbon steel wear-resistant composite material

The invention discloses a preparation method of a hard alloy and carbon steel wear-resistant composite material, which comprises the following steps: S1, pretreating to-be-welded surfaces of hard alloy and carbon steel to obtain pretreated hard alloy and carbon steel; s2, according to the sequence of the Cr foil, the Ni foil and the AgCu foil-shaped brazing filler metal, the Cr foil, the Ni foil and the AgCu foil-shaped brazing filler metal are overlapped to serve as a middle layer for welding; and S3, assembling according to the contact between the chromium foil surface of the welding middle layer and the welding surface of the pretreated hard alloy and the contact between the AgCu foil-shaped brazing filler metal of the welding middle layer and the carbon steel, and after assembling is completed, carrying out vacuum diffusion welding on a workpiece to obtain the hard alloy and carbon steel wear-resistant composite material after welding is completed. According to the invention, the middle welding layer adop