金属組織
RMA–CREO処理を適用したCu–Cr–Zr合金の二段時効特性
キーワード:
Cu‒Cr‒Zr alloy,
aging characteristics,
remarkable torsional distortion,
precipitation behavior
2023 年 62 巻 1 号 p. 79-84
詳細
2023 年 62 巻 1 号 p. 79-84
It was investigated that the two–step aging properties of Cu–Cr–Zr alloy applied to continuous remarkable torsional distortion processing (RMA–CREO processing) at 1273 K and by 5, 10, 15 and 20 rpm in rotation rate. After the secondary artificial aging was conducted at 773 K following with preliminary artificial aging at 623 K for 14.4 ks, the peak Vickers hardness was 125 HV for the comparative specimen which solution–heat–treated specimen (ST), and 121, 124, 124, and 126 HV by 5, 10, 15 and 20 rpm, respectively. The electrical conductivity at the peak Vickers hardness was higher for each CREO specimens than for the ST specimen. Furthermore, the secondary aging time to reach the peak Vickers hardness for each CREO specimens was halved compared to the ST specimen.
