Cu—Cr—Zr合金等温时效动力学研究

Study on Isothermal Aging Kinetics of Cu--Cr--Zr Alloy

本文通过测试Cu—Cr—Zr合金在等温时效过程中电阻率的变化研究了铜合金的等温时效动力学。试验中，在时效温度达到设定温度时，每lOs记录一个电压值，直到试验过程结束为止。通过分析曲线可知，Cu--Cr--Zr合金的时效曲线具有两个拐点，对应着时效析出的两个过程。最后，推导出了合金的时效动力学公式：ρ=ρmin（ρmax-ρmin）exp-（ktn）。通过对动力学公式二阶导数的分析，从数学上证明了合金等温时效两个析出过程的存在性。

In this paper, isothermal aging kinetics were studied by testing the electronic resistivity change of Cu--Cr--Zr alloy in isothermal aging. In the experiment, when the aging temperature achieves the hypothesis temperature, each los re- cords a voltage value, until testing conclusion. The reason why these two process occured is there are different material separa- ted in different period in the Cu--Cr--Zr alloy. And then carried on the experiment of constant speed heating ageing, and makes the electronic resistivity--temperature curve of constant speed heating ageing and the electronic resistivity difference-- time curve of isothermal aging, by these two curve additional remarks the two processes of ageing. Finally, inferred the alloy effectiveness dynamics formula： ρ=ρmin（ρmax-ρmin）exp-（ktn） Through to dynamics formula＇s analysis, has proven the existence of the two separation process on isothermal aging mathematically.