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经冷轧变形和中间退火制备了Cu-15Cr形变原位纤维增强复合薄板材料。用SEM、拉伸试验机和电阻率测试仪研究了变形量及退火温度对Cr纤维形貌、合金强度及导电性能的影响。结果表明:随合金变形量的增加,Cr纤维逐渐变薄、变宽,纤维间距逐渐减小,材料的抗拉强度和导电率都逐渐增大。退火温度升高,材料抗拉强度随之降低,导电率先升高后降低,退火温度为550℃时,导电率峰值为84.4%IACS;退火温度升高,Cr纤维依次发生球化,球化加剧、纤维断裂。最终变形量时,材料达到较好的综合性能匹配,退火前抗拉强度和导电率为694 MPa和78%IACS;500℃退火后抗拉强度和导电率为570 MPa和83%IACS。
Cu-15Cr deformed in situ fiber-reinforced composite sheet material was prepared by cold-rolling deformation and intermediate annealing. The effects of deformation and annealing temperature on the morphology, alloy strength and electrical conductivity of Cr fiber were investigated by SEM, tensile tester and electrical resistivity tester. The results show that with the increase of alloy deformation, the Cr fibers become thinner and wider, the fiber spacing decreases gradually, and the tensile strength and electrical conductivity of the materials increase gradually. When the annealing temperature increases, the tensile strength of the material decreases, the conductivity increases first and then decreases, and the conductivity reaches 84.4% IACS at the annealing temperature of 550 ℃. The annealing temperature increases, the spheroidization and the spheroidization of Cr fibers occur in turn , Fiber breakage. At the final deformation, the material achieves better overall performance matching with a pre-anneal tensile and electrical conductivity of 694 MPa and 78% IACS; tensile strength and electrical conductivity of 570 MPa and 83% IACS after 500 ° C anneal.