Abstract: The concentration curves of iron and nickel interface in the deep drawing steel strip are measured by electron-probe and simulated by error solution of diffusion equation. The mutual diffusion coefficient is acquired on the assumption that the diffusion coefficient does not relate to concentration. Dissimilar to Boltzman-Matona method for acquiring diffusion coefficient relating to concentration, the least square method is used to obtain concentration curve equation for calculating the mutual diffusion coefficient of iron and nickel interface.

Key words: interface； diffusion coefficient； error solution； Boltzman-Matona；