The invention discloses a preparation process of a tissue-controllable high-aluminum-content Cu-Al2O3
nano dispersion copper alloy. According to the preparation process, the Cu-Al2O3
nano dispersion copper alloy is prepared by performing ball milling activation and two-stage
internal oxidation on Cu-Al
alloy powder of which the
Al content is 0.5 to 1.0 percent by weight; the tensile strength of the Cu-Al2O3
nano dispersion copper alloy at
room temperature is larger than or equal to 550Mpa, the elongation rate is larger than 20 percent, and the electric
conductivity is larger than 78 percent IACS; when the Cu-Al2O3 nano dispersion
copper alloy is tensioned at a temperature of 700 DEG C, the tensile strength is larger than or equal to 245MPa. The preparation process is reasonable, and is convenient to operate, the formation of Al2O3 particles which are distributed continuously or densely along a
crystal boundary in a high-temperature
internal oxidation process can be effectively avoided;a
prepared material has the advantages of high electric
conductivity and high
room temperature and high-temperature strength and elongation rate, so that the prepared Cu-Al2O3 nano dispersion copperalloy has superior performance, high strength and high electric
conductivity. Thus, urgently needed raw materials are provided for the
assembly of spot-
welding electrodes, electrovacuum devices and high-
voltage direct-current relays on an automatic
welding production line in industries such as
electronics, appliances, electric vacuum, batteries and
new energy automobiles, and the preparation process is suitable for industrial production.