Aging Transformation Kinetic Equation of CuNiCoBe Alloy

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.