Method for preparing (TiB2+TiC) dispersion-strengthened copper-based composite material by mechanical alloying

The invention discloses a method for preparing a (TiB2+TiC) dispersion-strengthened copper-based composite material by mechanical alloying. The method uses Cu powder, Ti powder and B4C powder with the particle size of less than 100 meshes and the purity of over 99 percent as raw materials and comprises the following steps: mixing the Ti powder and the B4C powder in a molar ratio 3 to 1 and performing high-energy ball milling on the mixed powder at room temperature for 2 to 20 hours; then adding a certain proportion of Cu powder into the mixed powder after the ball milling to ensure that the mass ratio of the Ti+B4C powder to the Cu powder is 1:99-20:80; performing high-energy ball milling on the new mixed powder added with the Cu powder at room temperature for 2 to 10 hours; performing cold-press molding on the mixed powder after the ball milling; and finally sintering pressed blanks in an argon protective atmosphere resistance furnace at the temperature of between 800 and 1,000 DEG C for 1 to 3 hours to obtain the TiB2+TiC dispersion-strengthened copper-based composite material with the average particle size of between 5 and 10 mu m. Through the simple high-energy ball-milling mechanical-alloying method adopted by the invention, the (TiB2+TiC) dispersion-strengthened copper-based composite material is prepared by synthesizing the pure Cu powder, Ti powder and B4C powder; and the method has the advantages of simple process, low production cost, high product yield, high product quality and the like.