研究了CuCrZr合金等径角挤压(ECAP)后的微观组织演变及软化温度.结果表明,固溶态CuCrZr合金经路线B_c(每挤一道次后试样沿同一方向旋转90°)等径角挤压10道次后组织细化至亚微米级,超细晶晶粒较为等轴、均匀.等径角挤压10道次后合金的软化温度约为530℃,但550℃时,合金的硬度仍高达161HV,这说明ECAP后合金的抗软化能力并没有降低.因为ECAP促进了时效时析出相的析出,使得析出相更为弥散、细小,从而提高了合金的力学性能.
Microstrueture evolution and softening temperature of CuCrZr alloy after equal channel angular pressing (ECAP) were investigated. The results show that the grains of solid-solutioned CuCrZr alloy are refined to sub micrometer level after ECAP for l0 passes with route Bc (the sample is rotated sequentially by 90 °around its axis). The uhra-fine grains are more equiaxed and homogeneous. The softening temperature is about 530℃, however, vickers hardness even remains 161HV at 550℃ for the 10 passes ECAPed sample, which indicates that the softening resisitance of CuCrZr alloy does not decrease after ECAP. It is argued that the precipitation of dispersed and fine precipitates is accelerated by the ECAP and thus mechanical properties of the alloy are improved.
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