SU505553A1 - Electrospark alloying method - Google Patents

Description

(54) METHOD OF ELECTRIC DEFINITIONING

one

The invention relates to the field of electrical processing and can be used in mechanical engineering for alloying (strengthening

restoring the size of metal parts.

Known methods of electrospark legee

: fabrication of metal parts in which doping is carried out by ferromagnetic powders held at the surface

Electrode-tool magnetic field of electromagnetic coils. However, this method has a low productivity and low quality of the treated surface.

The purpose of the invention is to intensify the doping process and improve the quality of the treated surface. This is achieved by the fact that in the process of doping ferromagnetic powders and the workpiece are heated, for which the ferrotoroshka is partially immersed in a flow-through electrolyte, through which electric shock is passed. Thanks to such a spark-spark circuit

the first to heat the eropowder to a state of melting (decomposition) is

It does not go from room temperature (15.2O-C), but from a higher temperature, and with each electric discharge more particles of ferro-powder are melted onto the surface of the heated part over a shorter period of time.

In the drawing, n {one of the variants of the scheme of the method of electrospark alloying of metal parts is represented.

Claims (3)

The workpiece 1 is installed with a necessary gap with an in-t electrode, a strument 2, on the surface of which ferromagnetic powders 3 are located. The electromagnetic coil 4 is connected to an IK. source of direct current (conventionally not shown in the drawing). The source of electric spike pulses 5 with a current-limiting: with an impedance of 6 and a storage capacitor 7 is connected to the workpiece 1 and the instructing electrode 2. Bath 8 is filled with a flow-through electrode 9. A constant 1O depletion connected to the current collection plate 11 and the electrode; tool 2, is used to heat the electrolyte 9. When turning on the power of the electromagnetic coil 4 of ferropowder 3 on the surface of the electrode tool 2, it assumes a oriented position along the magnetic field lines. Uraden flow electrolyte 9 due to the circulation system of the bath 8 is adjusted so that the tops of the ferroparticles 3 are three and the orientation is above its surface. The direct current source 10 is switched on and, due to the passage of electric current between the current collection plate 11 and the electrode tool 2, the electrolyte is heated to an operating temperature, for example 50-70 ° C. Then, the rotation (displacement) of the workpiece 1, which is brought into contact with the vertices of the ferropor 3 particles, and the source of electric spark pulses 5 are activated. At that, each time the charge is 1; nano-booster condenser 7 electrolyte heating of ferropowders 3. After charging, the capacitor 7 is charged in the form of spark discharges between the workpiece and the ferropowder and the ferropowder heated to the required temperature is chipped (melted) on the disheveled surface of the part 1. The workpiece is heated by the heat emitted from the surface of the i-i buckwheat electrolyte. Additional heating of ferromagnetic alloying powders and the workpiece significantly increases the speed of treatment, improves the quality of the treated surface and the continuity of the applied coating. Additional heating also contributes to better adhesion of the applied coating / to the metal of the workpiece and lower energy costs of the source of electrical impulses. Invention Formula. Ani Mode; electronic doping of metal parts with ferro-rim peritels held by a magnetic field on the / surface of the electrode-tool placed under the workpiece, so that in order to intensify the process of doping and improve the quality of the workpiece due to the heating of ferropowders, the process gets into the medium of the electrolyte, the level of which is kept constant, when the 4acTtm ferropowder is immersed in it, and an electric current is passed through the electrolyte. .