Industrial Technologies / Nanotechnology
STRUCTURING OF SURFACES OF METAL PARTS
Technology and equipment
Description
Structuring of surfaces of metal parts is performed
with the electric current commutated by the pulsed
plasma.
Alloying elements (ions and vapors of metals) are
added to plasma and participate in a micro metallurgical
process occurring on the molten surface of a part.
Heat capacity of metal of the part provides the high
rates of cooling and solidification of the melt.
Cycling of
the melting and solidification process
under conditions of pulsed physical
fields provides
stirring and crystallisation of alloy to form nano- and
microcrystalline structures.
Innovative Aspect and Main Advantages:
The technology is
implemented using ingenious
of
accelerators
alloying
elements
(Fig. 1), which are
based
on
development of the
non-stationary
of
of
gas
the
processes
detonation
combustible
mixtures
in
electric field.
The surface is
the
treated with
electric,
pulsed,
acoustic
magnetic,
and
elastic-
deformation fields,
Fig.1. Automated equipment with
thus enhancing the
accelerator of
elements
heat
“abnormalâ€
applied for structuring of surfaces
transfer
and mass
of metal parts.
processes
and
providing formation of new materials and alloys with a
nano-microstructure in the surface layer of (Fig. 2).
alloying
The structuring process leads to a multiple increase
in hardness and friction, corrosion and erosion resistance
of the surface layer of the part (Fig.3).
Fig. 2. Structured layer on the surface of steel
Areas of Application:
State-of-the-art. Application of
technology
improves physical-operating properties of the surface layer
and, therefore, performance of metallic micro- and macro-
parts working under wear and complex stress conditions, as
well as metal, wood, plastics, vegetable food and soil
processing tools.
the
Future prospects. A layer of high-alloy nano-
microstructured alloy is formed on the surface of parts (See
Fig.3). The layer will provide workability, accuracy and
performance of micro tools and parts of micro machines
formed by engraving using laser or electric discharge
technologies.
a)
b)
v)
(x500) Fig. 3. Structured layer on the surface of:
a) steel 7KhNM; b) steel U8;
v) cast iron; g) titanium VT-1.
g)
Stage of Development:
The technology and equipment are covered by the patents of
Europe, Russia and Ukraine, and are commercially applied
for structuring of the working surface of tools and machine
parts. Performance of the wood and metal processing tools
increased after the treatment by a factor of 3 to 6.
Contact Details:
TYURIN Yuri
E.O.Paton Electric Welding Institute NASU
Tel.: (38 044) 289 09 14
Fax: (38 044) 271 20 34
E-mail: ytyurin@i.com.ua
http://www.i.com.ua/~ytyurin
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