Solution of Multiperiod Carburization Diffusion Equation

Using the superposition property of linear partial differential equation finds the solution of piecewise-time-carburization diffusion equation for the carburization process of the objects in oven, and obtains the carbon concentration distribution function with the boundary condition of type 3.The method can describe the physical behavors of the piecewise-time-carburization diffusion equation in each time in terval.