Structure and Properties of Surface Layers of Pieces Cemented when Interacting with the Plasma Channel of Electric Discharges in Pulse

Résumé

In this paper it is presented a cementing method of the superficial layer of the parts surface by applying electric discharge in pulse with electrode tools made of graphite. By metallographic analyses and studying the micro hardness of superficial layers of plastic mold steel parts it has been determined the fact that the electric discharge in pulse under a regime of overexcitement induce thermal and thermo chemical processes, that considerable influence micro hardness of the white layer by increasing its value of 18 times.