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. |
1 pulse 5 pulses 10 pulses |
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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
E-mail: pmi.nil26@gmail.com |