2023 Volume 62 Issue 1 Pages 124-127
In recent years, due to the expansion of use of heat exchanger and electric vehicle and the growing awareness of environmental issues, there is a need to reduce the cost of copper–based material. Therefore, high–strength copper alloys for thinner thicknesses were developed. In this study, we focused on the difference in aging temperature and Ni/P concentration ratio of Cu-Ni-P alloy, and investigated the influence of the aging properties of Cu-Ni-P alloy. when the concentration ratio of Ni/P was 2, the maximum hardness was about 149 HV, and the conductivity at that time was about 55%IACS, which is the highest hardness value. And the concentration ratio was from 2 to 1 or 3, the hardness decreased and the time to reach the maximum hardness became longer. From the results of thermal analysis by DSC, it was deduced that the amount of Ni2P and/or Ni12P5 increased when the concentration ratio of Ni/P was 2.
