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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BC(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。
The microstructure evolution and softening temperature of CuCrZr alloy after ECAP were studied. The results show that the solid solution CuCrZr alloy passes through line BC (after each extrusion, the sample is rotated by 90 ° in the same direction), the microstructure of the CuCrZr alloy is refined to submicron order after being pressed for 10 passes, Shaft, uniform. The alloy softening temperature is about 530 ℃ after 10 times of equal diameter angular extrusion, but the hardness of alloy is as high as 161HV at 550 ℃, which shows that the softening resistance of ECAP alloy does not decrease. Because ECAP promotes the precipitation of the precipitated phase during aging, the precipitated phase is more diffuse and smaller, thereby improving the mechanical properties of the alloy.