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采用铜模铸造制备了直径为20mm的Cu_(99)Zr_(0.5)Al_(0.5)合金棒,研究了其铸态和冷轧态组织以及时效温度和时间对其电导率及力学性能的影响。结果表明,Cu_(99)Zr_(0.5)Al_(0.5)铸态合金由细小的等轴晶粒组成,晶界处存在少量共晶组织,冷轧后晶粒在轧制方向上被压扁、拉长,形成条带状变形组织。在不同时效温度下,合金硬度(HV)随时效时间的延长先增加后减小,而电导率随时效时间的延长先迅速增大后趋于稳定,经过450℃×1h时效后,硬度(HV)达到172,抗拉强度为460MPa,电导率为34.86 MS/m。
The Cu_ (99) Zr_ (0.5) Al_ (0.5) alloy rods with the diameter of 20mm were prepared by copper die casting. The effects of as-cast and cold-rolled microstructure, aging temperature and time on the electrical conductivity and mechanical properties . The results show that the as - cast Cu_ (99) Zr_ (0.5) Al_ (0.5) alloy consists of fine equiaxed grains with a small amount of eutectic structure at the grain boundaries. After cold rolling, the grains are crushed in the rolling direction, Stretched to form a strip of deformed tissue. At different aging temperatures, the hardness of alloy (HV) first increases and then decreases with the aging time, while the conductivity increases rapidly and then stabilizes with the aging time. After 450 ℃ × 1h aging, the hardness (HV ) Of 172, a tensile strength of 460 MPa and a conductivity of 34.86 MS / m.