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Abstract
Cu-15Cr and Cu-15Cr-0.05Ce in situ composites are fabricated by the cast-intermediate heat treatment (IHT)-deformation technology process. The microstructure, mechanical property, conductivity, and the wear resistance were studied by Optical microscope, Scanning electronic microscope, tensile-testing machine and Pin-on-bar reciprocating wear tester, respectively. The results show that the trace addition of Ce elements can refine the primary phase dendrites and deformed Cr fibers, increasing the intensity significantly but slightly improving the conductivity. On this basis, the mechanism of strength and conductivity is discussed. Compared to the Cu-15Cr alloy, the hardness and wear resistance of the Cu-15Cr-Ce alloy are improved due to the addition of Ce to refine the Cr fibers.
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