摘要
通过对固溶态Cu Ni Si Cr合金时效中电阻变化规律的分析 ,研究了合金时效早期析出行为 ,根据导电率与新相的转变体积分数之间的线性关系 ,得出了在一定温度下合金时效的Avrami相变动力学经验方程和导电率与时效时间的一元方程。在 5 0 0℃时效时合金的相变动力学方程为 :f=1-exp(- 0 0 0 4 0t0 70 0 3) ,在此基础上绘制了“S”曲线及等温转变“C”曲线的开始线。
The precipitation behaviors at early stage of aging in solution treated Cu-Ni-Si-Cr copper alloy have been studied in terms of the analyses of the electric resistance variations. On the basis of the linearity relationship between the electric conductivity and the volume fraction of precipitations, both the empirical equation of Avrami phase transformation kinetics and the simple equation between electric conductivity and aging time are obtained for Cu-Ni-Si-Cr copper alloy aged at certain temperatrue. The phase transformation kinetics equation is given as: f=1-exp(-0.0040t 0.7003 ) on aging at the temperature of 500℃, through which, the transformation kinetics “S' curve and the initial points of the isothermal transformation “C' curve are drawn.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2003年第4期22-26,共5页
Transactions of Materials and Heat Treatment
基金
河南省重大科技攻关项目 (0 1 2 2 0 2 1 30 0 )
