快速凝固ＣｕＣｒ和ＣｕＣｒＺｒＭｇ合金经时效处理后显微硬度显著升高，在５００℃时效后，ＣｕＣｒ合金的硬度峰值为２０６ＨＶ，ＣｕＣｒＺｒＭｇ合金的硬度峰值为２５０ＨＶ。用透射电镜对两种合金时效过程中析出相的变化及其对显微硬度的影响进行了分析。ＣｕＣｒ合金达到峰值硬度时析出相为与母相共格的面心立方Ｃｒ，随后逐渐与母相失去共格关系并转变成体心立方的Ｃｒ。ＣｕＣｒＺｒＭｇ合金对应峰值状态的析出相为Ｈｅｕｓｌｅｒ相ＣｒＣｕ２（ＺｒＭｇ），过时效状态下转变成面心立方的Ｃｕ５Ｚｒ和体心立方的Ｃｒ Rapid solidification of Cu-Cr and Cu-Cr-Zr-Mg alloy after aging treatment significantly increased the microhardness, aging at 500 ℃, Cu Cr hardness peak 206HV, Cu Cr-Zr-Mg alloy The hardness peak is 250HV. The changes of precipitated phases and their effects on the microhardness of the two alloys during aging were analyzed by transmission electron microscopy. When the Cu-Cr alloy reaches the peak hardness, the precipitated phase is face-centered cubic Cr which is in agreement with the mother phase, and then gradually loses the coherent relationship with the mother phase and changes into the body-centered cubic Cr. CuCrZrMg alloy corresponding to the peak state precipitation phase Heusler phase CrCu2 (ZrMg), over-aging state transition into face-centered cubic Cu5Zr and body-centered cubic Cr