以弥散随机形核、各向同性长大为前提 ,利用体视学原理处理晶粒碰撞 ,导出用积分方程和微分 积分方程表述的固态相变动力学方程。在形核率和长大速度均为常数的情况下 ,这两个方程的数值解与n =4的JMAK方程几乎完全吻合。用数值计算方法得到了早期形核地点饱和以及变速长大条件下的动力学曲线。探讨了固态相变动力学的相似性 In order to diffuse random nucleation and isotropy, the principle of stereology was used to deal with the grain collisions and the kinetic equations of solid state transformations, which were expressed by integral equation and differential integral equation, were deduced. In the case of a constant nucleation rate and growth rate, the numerical solutions of these two equations almost completely coincide with the JMAK equation of n = 4. The kinetic curves of saturation at early nucleation sites and the conditions of variable speed and growth are obtained by numerical calculation. The similarities of solid phase transformation kinetics are discussed