Nano dispersion copper alloy with high air-tightness and low free oxygen content and brief manufacturing process thereof

A brief manufacturing process of a nano dispersion copper alloy, comprising the steps of:

• preparing Cu—Al2O3 alloy powder by an internal oxidation method;
• mixing the Cu—Al2O3 alloy powder with Cu—Ca—La alloy powder;
• sheathing the mixed powder under protection of argon to obtain a sheath;
• performing hot extrusion on the sheath at 900° C. to 920° C. to obtain an extruded sheath;
• performing rotary forging on the extruded sheath to obtain a rotationally forged bar;
• placing the rotationally forged bar in a new sheath;
• vacuumizing the new sheath to be less than or equal to 10−3 Pa;
• sealing the new sheath to obtain a new sealed sheath;
• and
• placing the new sealed sheath in a nitrogen atmosphere with a temperature ranging from 450° C. to 550° C. and a pressure intensity ranging from 40 Mpa to 60 Mpa for 3 hours to 5 hours,
• wherein the nano dispersion copper alloy comprises the following components in percentage by mass:
• 0.05 wt. % to 1.61 wt. % of Al2O3,
• 0.008 wt. % to 0.012 wt. % of Ca,
• 0.008 wt. % to 0.012 wt. % of La, and the balance of Cu.