Abstract:In order to solve the problem that beryllium copper strip is prone to large deformation, easy edge scraping and unstable mechanical properties during continuous annealing. In this paper, the most advanced vertical continuous annealing furnace was used to anneal the domestic 0.3 mm QBe2 pre-finished strip at 600~760 ℃. The microstructure and mechanical properties of strip under different technological conditions were analyzed. The analysis results showed that reasonable heat treatment could make QBe2 beryllium copper alloy, a typical aging precipitation reinforced alloy, achieve a leap improvement in these properties on the basis of excellent comprehensive properties such as high strength, high hardness, high conductivity and high elasticity. QBe2 beryllium copper strip would be softened in a very short time under the annealing process of 600~760 ℃ . With the increase of heat treatment temperature, the tensile strength and yield strength of QBe2 beryllium copper alloy decreased obviously. The higher the heat treatment temperature, the greater the elongation. When the annealing temperature was 700 ℃, QBe2 beryllium copper strip obtained better plasticity. When the annealing temperature was higher than 700 ℃, the hardness and tensile strength of QBe2 beryllium copper strip increased obviously after aging, and the elongation decreased sharply. After annealing at 760 ℃, QBe2 beryllium copper strip had the same strong plasticity as supersaturated solid solution, which was easy to be cold-rolled and provided a good performance basis for subsequent solution and aging treatment of finished products.