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TECHNOLOGY OF PULSE-PLASMA MODIFICATION OF TOOL SURFACE


The technology of pulse-plasma modification relates to the heat treatment and is used for strengthening of working surfaces of the items made with high class of accuracy and purity from the medium and high-carbon instrumental and constructional steels.

Technological equipment designed for pulse-plasma modification enables to generate pulse-plasma flows of ~ 30mm in a diameter with a temperature of 5 000-1 000 K and with a frequency of 10 Hz in the air at normal atmospheric pressure. This provides an easy use of the technology in terms of production, high performance and efficiency. Microcrystalline surface layer is formed having a high hardness, fatigue strength, wear resistance and corrosion, as a result of pulse-plasma modification of the working surfaces of the tools.

Технология импульсно-плазменной модификации рабочих поверхностей инструмента Технология импульсно-плазменной модификации рабочих поверхностей инструмента Технология импульсно-плазменной модификации рабочих поверхностей инструмента
1 pulse Технология импульсно-плазменной модификации рабочих поверхностей инструмента
5 pulsesТехнология импульсно-плазменной модификации рабочих поверхностей инструмента
10 pulses
Equipment of pulse-plasma modification Process of pulse-plasma modification Structure of modified layer

The structure and properties of the modified layer depend on the type of treated steel and quantity of pulses of plasma treatment. Exposure of ten pulses of plasma can cause the modification of the surface layer to a depth of 100 microns. A strengthened layer is formed with a depth of 0.5 mm and with a microhardness of up to 10 GPa, as a result of a longer pulse-plasma exposure on the surface of high carbon instrumental types of steels.

Technical characteristics of the equipment of pulse-plasma modification:

· AC Powert consumption (50 Hz).... .. 15,2 kWt;

· Supply voltage ……………… ………..…...... 380/220 V;

· Frequency adjustment of pulse generation of plasma .....…..…... 1 – 10 Hz;

· Adjustment of number of plasma pulses …………………... 1 – 999;

· Type of pulse plasma …..…………………………………….…… air-operated;

· Area of pulse-plasma treatment …….. ……………........... 200х200х50 mm;

· Speed of surface modification ...……… ……..………..….… до 100 µm/s.

Pulse-plasma modification technology enables to increase the wear resistance of tool operating surfaces and therefore to increase the service life and durability of its operation. Output rate of pulse-plasma modification process is much higher than the cementation process, and its cost is several times lower due to the reduction of the energy intensity and the material consumption.

Contact number: tel./fax 292-61-87
Sergey Bedenko,
Oleg Kuznechik (8-029-131-35-30)

E-mail: pmi.nil26@gmail.com

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