Study on the preparation process,microstructure and properties of multi-component CuCrSn-X-Y alloy
Multi-component bulk CuCrSnFeP and CuCrSnZrZn alloys were prepared by powder metallurgy tech-nology,and the sintering process,microstructure and properties of the alloys were explored and characterized.The results show that when the sintering temperature is 950 ℃,the sintering density of CuCrSnFeP alloy increas-es with the sintering time,while the sintering density of CuCrSnZrZn alloy fluctuates greatly. When the sintering temperature is 1 000 ℃,the overall sintering density of CuCrSnFeP alloy is slightly higher than 950 ℃,while the sintering density of CuCrSnZrZn alloy is slightly lower than 950 ℃. When the sintering temperature is 1050 ℃,there is a phenomenon of powder detachment on the surface of the billet. Sintering for 2 h at 1 000 ℃ is a better sintering process for CuCrSnFeP alloy,in which the sintering density,hardness and conductivity of Cu-0.65Cr-0.2Sn-0.05Fe-0.05P alloy are 8.79 g/cm3,91HV0.2 and 61％IACS,respectively. And the microstructure is relatively uniform,there are a large number of annealed twin inside,the average grain size is about 21.63 μm,Sn elements have no obvious agglomeration and are diffusely distributed in the matrix,while P elements and a small amount of Fe elements are biased at the edge of the large granular Cr phase and exist in the copper matrix. In ad-dition,there is a certain amount of dislocation entanglement inside the grains.
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