铜镍钴铍合金的时效相变动力学方程  

Aging Transformation Kinetic Equation of CuNiCoBe Alloy

作　　者：陈健[1] 刘雪飘[1] 梁欢[1] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室,镇江212003

出　　处：《机械工程材料》2011年第1期19-21,25,共4页Materials For Mechanical Engineering

摘　　要：研究了铜镍钴铍合金固溶后时效处理工艺对其电导率的影响,通过电导率与析出的第二相体积分数的关系推导了该合金的相变动力学方程。结果表明:该合金固溶后在不同温度时效时随着时间的延长,电导率开始增加较快,经3～4h时效后增速减慢;时效温度越高,时效初期电导率的上升速率越大,最终电导率也越高;时效过程中电导率的增加量与第二相的析出量存在一定的线性关系,推出了该合金在430～510℃内不同温度下时效时的相变动力学方程和电导率方程。The effect of aging process on the electric conductivity of the CuNiCoBe alloy after solution was studied.The transformation kinetic equation of the alloy was derived through the relationship between the electric conductivity and volume friction of the precipitated second phase.The results show that after the soluted alloy aged at different temperatures the electric conductivity increased fast at the beginning with the prolongation of time,and after aging for 3-4 h the speedup got slower.At the beginning of the aging process,the higher the aging temperature,the greater the conductivity ascending rate and the electric conductivity could get a high level at last.There existed a linear relationship between the increment of the electric conductivity in the course of aging treatment and the precipitation amount of the second phase.Transformation kinetic equation and the electric conductivity equation of the alloy at different temperatures between 430 ℃ and 510 ℃ could be concluded.

关 键 词：铜镍钴铍合金 相变 时效处理 相变动力学 电导率 

分 类 号：TG166.2[金属学及工艺—热处理]