Cu-Zn合金中β′→β转变动力学

Transformation Kinetics of β' to β in Cu-Zn Alloy

用DSC法研究了Cu-Zn合金组织中β′→β转变动力学。结果表明,Cu-Zn合金以10℃/min升温时的β′→β转变起始温度为446.23℃,结束温度为460.42℃,转变时间为114.84s,合金的转变表观激活能为4147.72kJ/mol;当转变体积分数小于50%时,其转变激活能变化不大,然后,随着转变体积分数的增加,其转变激活能逐渐减小。

Transformation kinetics of β＇ to β in Cu-Zn alloy was studied by the methods of DSC. The results show that the beginning and ending temperature of β＇ to β transformation in Cu-Zn alloy is 446.23℃and 460.42℃, respectively, the time of β＇ to β transformation is 114.84 s at heating rate of 10℃/min. The apparent activation energy of β＇ to β transformation is 4 147.72 kJ/mol, its activation energy changes slightly when the volume fraction of β＇ to β transformation is below 50%, and then gradually decreases with β phase content increasing.