Heat expansion in WC-based alloy treated with electro-spark
An investigation of energy discharge treatment to the solid material is important and perspective branch of modern physics of the solid state. It is due to very practical meaning of the problem and the absence of union theoretical base for change of an energetic treatment type and its configuration. Electro-spark doping method is the wide accepted in our country and also out of border for improve material properties. This is the one branch of electric impulse treatment methods to metallic electrodes. There are a set of phenomena such as mechanical, thermodynamic, chemical and so on during an acting of an electro-spark doping facility. Thermic processes have a very significant meaning in the structure transforming, so investigation of heat spreading in the electrode layer is especially important. The paper is devoted to the consideration of thermal model of WC-Co alloy electro-spark doping process. At the start point in the developing of the math model have been chosen a single-directed process of heat transfer in isotropic material layer. Further, the solvation had been expanded for the unlimited space and supplemented by the limit value. The Cauchy parabolic equation solvation for thermal conductivity have been obtained. This paper also deals with equation allows to get value of the thermal field spreading from continuously moving charge source q in a long time. At the conclusion, we have been offered the isothermal surfaces for two cases of electro-spark treatment. The first one is the treatment of WC-based hard alloy with periodic acting doping electrode, and the second is the extreme case of energy treatment with the single long doping pulse.