The redistribution of hydrogen in steel weldments part II. The Fe-H-C-i ferrite/austenite type weldments

A new analytical quasistationary diffusion model of hydrogen and carbon dif fusion in Fe-H-Ci ferrite/austenite type weldments is presented. The new mo del is presented in the form of a system of the analytical relations and it s presented variant presumes the stationary redistribution of substitution elements. Using the thermodynamic, diffusion and phases data, it is possibl e, by means of these relations, to calculate carbon and hydrogen concetrati on curves in the ferrite/austenite steel structure weldments at different t emperature and time of annealing. Limiting conditions for possible applications of the presented quasistation ary model in the above-mentioned welding joints are discussed.