G115钢在780℃的回火过程中，随着C含量由0增加到0.20%，M₂₃C₆相颗粒的平衡摩尔分数逐渐增加到1.82%。MX相颗粒的平衡摩尔分数基本不变维持在0.04~0.06%左右。

During the tempering process of G115 steel at 780℃, as the C content increases from 0 to 0.20%, the equilibrium mole fraction of M23C6 phase particles gradually increases to 1.82%. The equilibrium mole fraction of the MX phase particles remains basically unchanged at about 0.04~0.06%.