Cu-Te合金的退火工艺

研究了退火工艺对Te含量分别为0.02%、0.07%、0.10%的3种Cu-Te合金的力学与导电性能及组织的影响,测试了不同退火温度和不同退火时间下合金的力学性能和导电性能,使用扫描电镜(SEM)研究了Cu-Te合金在不同退火温度下拉伸断口的形貌变化。结果表明:Cu-Te合金断裂属于韧性断裂,断裂形成的韧窝随着退火温度的上升,尺寸变得越大、越深,形状变得更加圆整;随着退火温度与退火时间的增加,Cu-Te合金的导电率持续增加,抗拉强度在350～390 ℃退火1 h时变化不大,合金处于回复阶段,400 ℃退火1 h后,抗拉强度大幅度下降,合金处于再结晶阶段;Cu-Te合金经过冷变形 (ε=96.5%)后,在400 ℃退火1 h,获得最佳的综合性能。

Annealing process of Cu-Te alloys

The effects of annealing process on the mechanical and electrical conductivity properties and microstructure of Cu-Te alloys with 0.02%, 0.07%, 0.10%Te respectively were investigated. The mechanical properties and electrical conductivity of the alloys were tested under different annealing temperatures and annealing time, and the tensile fracture morphology changes at different temperatures were studied by scanning electron microscopy (SEM). The results show that the fracture of the Cu-Te alloys is of ductile type, and the fracture dimples become larger, deeper and more round with the inerease of annealing temperature. With the increase of annealing temperature and annealing time, the conductivity of the alloys continues to increase, while the tensile strength changes little when annealed at 350-390 ℃ for 1 h, the alloys are in the recovery stage. After annealing at 400 ℃ for 1 h, the tensile strength decreases greatly and the alloys are in the recrystallization stage. After cold deformation of 96.5% and annealing at 400 ℃ for 1 h, the Cu-Te alloys obtain the best overall performance.