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采用热拉伸方法在100至300℃温度范围内对CuCrZr合金进行处理,实验结果表明:热拉伸处理工艺能成功地制备具有高硬度和一定导电能力的CuCrZr合金。在不同的处理温度下,随着延伸率的增加,所得材料的显微硬度均有所增加,而导电性均有一定程度的降低。通过TEM观察到大量的含Cr沉淀相,且这些沉淀相与Cu基体之间存在Nishiyama-Wasserman位向关系。热拉伸处理后的CuCrZr合金的高显微硬度和可接受的导电性归因于固溶原子析出、位错增殖、晶粒细化以及沉淀强化的共同作用。
The hot-stretching method was used to treat CuCrZr alloy in the temperature range of 100-300 ℃. The experimental results show that the hot-stretching process can successfully prepare CuCrZr alloy with high hardness and electrical conductivity. At different processing temperatures, with the increase of elongation, the microhardness of the obtained materials increased, while the conductivity decreased to a certain extent. A large number of Cr-containing precipitates were observed by TEM, and there was a Nishiyama-Wasserman orientation between these precipitates and the Cu matrix. The high microhardness and acceptable electrical conductivity of the hot-drawn CuCrZr alloy are due to the combined action of solid solution atom precipitation, dislocation propagation, grain refinement and precipitation strengthening.