Calculation method for oxidative coupling of elements in steel alloy in continuous annealing process

The invention relates to a method for calculating the oxidative coupling of elements in a steel alloy in a continuous annealing process, which comprises the following steps: presetting annealing process parameters, measuring the content and parameters of each element in the steel alloy, and calculating the oxidative coupling of the elements in the steel alloy according to the appearance, contact angle and maximum nucleation number of oxides on the outer surface of the steel alloy. Calculating the nucleation rate, the critical nucleation radius and the critical nucleation time of the oxide crystal embryo on the surface of the steel alloy; on the basis of internal oxidation thermodynamics and dynamics, diffusion power of oxidizable elements and oxygen elements in the steel alloy is calculated, and the precipitation amount and the distribution condition of oxides in the steel alloy are judged and calculated; and a steel alloy element selective external oxidation kinetic model is established, a time-varying curve