SVM technologies in metallurgy

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Transcript SVM technologies in metallurgy

Reports of Kurapov – Panov Group
Before treatment
(reference sample)
After treatment
with SWM technology
Microstructure of 110Г13Л in cast state
Modern metallurgy knows a number of
technologies, using physical fields and
emissions for influence on metal melts in
order to change physical and mechanical
properties of these metals.
•We have created a generator of nonstationary electromagnetic field for the
treatment of metal melts directly in the
furnace which was called SWM –
generator (structural phase wave
magnetic resonance treatment) with
power consumption up to 50 W working
in frequency band 102 – 3x107 Hz. With
the help of this generator we have
obtained effect of deep and volumetric
influence on the melts of black metals,
improving of their structure and
mechanical properties.
Developers of the technology:
The principle diagram of the generator is shown on Fig. 1. The generator itself is directional antenna device with
adjusting focus of the emission (wave emitter) which is fed by converter – forming modulator unit. Trial model of the
generator was named “Electromagnetic Modulator ORSK-M Type”. The method of melt treatment with generator and
design of the emitter are patented. The size of main working zone of the generator (focal zone) has a diameter of 0.3 m.
Wave treatment is being made during whole time of melting (0.5 – 1 hour). Magnetic field induction in working zone
does not exceed 1 Gs. Strength of electromagnetic field is about 2 kV/m. Equivalent noise level created by the generator
does not exceed 36 dB, including ultrasound band.
As a primary source of feeding the generator standard signals oscillator GSS-40 was used. Electromagnetic shield of the
generator was connected to AC mains.
Fig.1 Diagram of wave treatment of the melt
1 – melting furnace with metal (ladle); 2 – directional emitter (wave channel) of SWM-generator; 3 – emitting element; 4
– forming modulating unit with modifier; 5 – power supply; 6 – wave emission. The focus F of the emitter is oriented into
the volume of the melt. Wave treatment of the melt is being made through the wall of the furnace.
From 2004 to 2009 this plant had been continuously
operating at JSC “Tochlit” (Motovilikha Plants) in steel
It was found, that the character of generator’s influence
on the melts is significantly depending on the material
of the substance placed into the resonance chamber of
modulating unit, i.e. on the modulating substance,
which is virtual or passive modifier of the metal.
Traditional in metallurgy alloying and modifying
chemical elements were used as modulators:
magnesium, manganese, rare-earth elements etc.
Modulator served as a filter, modulating emission
spectrum of the generator. Treatment of ferrous metals
with SWM generator was carried out in two main
I) – low-carbon and middle-carbon steels (with carbon
content ≤ 0.8%) were treated using the modulator with
austenite stabilizing elements: manganese + nickel +
II) – high-carbon steels and cast irons (with carbon
content ≥0.8%) were treated using the modulator with
increasing the dissolvent of carbon in iron: magnesium
+ manganese + rare-earth elements. The signal of
Nuclear Magnetic Resonanse of modifying substance
wad fed into forming modulator unitat that time.
Wave emitter of SWM generator was
mounted outside of metallurgical furnace,
working zone of the generator was oriented
into the volume of the melt.
The treatment of melt had being made
through the wall of the metallurgical furnace.
Treated metal was used for manufacturing ingots with a mass from
2.8 to 60 tons, casts with a mass up to 3.9 tons and also rolled stock.
The ingots then were used for manufacturing smith forgings. With the
use of wave treatment more than 100 industrial melts of volumes from
60 to 400 tons with total mass of about 8500 tons and more than 300
industrial and experimental melts of little volumes (50 – 280 kg) were
made. For studying the properties of metals passed the wave
treatment following samples of parts were chosen: mill rolls for cold
rolling (forged, cast-forged) guiding rolls, mill rolls for hot rolling,
bowls, punching cubes, hot-rolled list metal, cast parts. These parts
were made of 09Г2С, 5ХНМ, 10ХН3МДЛ, 17Г1С, 35Л, 35ХГСЛ, 40ХЛ,
40ХМА, 45, 50ХН, 60XH, 75Х2СГФ, 90ХФ, 9Х2МФ steels and СЧ25 pig
iron. For some steels research melts were counted in tens, for others –
single melts for method’s evaluation purposes.
Researches were conducted at various stages of technological cycle:
after pouring (probes and tidal samples), after thermal treatment, at
the final stage of manufacturing. Micro and macro structures and
mechanical properties were investigated, gas and ultra-sound analysis
were conducted. Macrostructure was evaluated visually,
microstructure was examined with optical microscopes, gas and
ultrasound analysis and evaluation of mechanical properties were
carried out with instruments of Central Plant Laboratory.
Melt treatment with the using of SWM
technology. Wave emitter is on the
front plane.
Influence of wave treatment on structure, phase content and
mechanical properties of the steels
Specific signs of SWR treatment are the breakage of structure
(decreasing of austenite grains size in average for 2-3 points)
and the increase of its uniformity, including uniform
distribution of the carbides, which usually leads to the growth
of mechanical properties minimum in 1.5 times and to
decrease of anisotropy. Results of the researches allow us to
declare about the increase of plastic properties of the steels
with retaining the strength properties. For the ferrite-perlite
steels the changes in phase content in increase of perlite
amount were observed. Chemical gradient of the phases was
lowered, phase borders became more “fuzzy”. Dependence
between breakage of microstructure and increase of
mechanical properties was observed (except for 110Г13Л
(Hatfield) steel) was observed, though there were cases when
the increase of mechanical properties after SWM-treatment
was observed without visible changes in metal’s structure.
Microstructure of 110Г13Л (Hatfield Steel)
samples (X100)
a) reference sample, austenite of 0 -1 units
b) after wave treatment; characteristic breakage of
the grains (4-5 units) and more uniform of the
carbides is observed/
35ХГСЛ steel (X100)
a) – reference sample
(ferrite grid, widmanshtet 2 – 3 units, perlite and ferrite grains)
b) – after wave treatment; ferrite and perlite grains
In all, the influence if SWM-treatment leads to the fact that
after thermal treatment cast metal gets mechanical
properties close to those of strained metal of the same
type. The dissipation of mechanical properties from melting
to melting also lessens.
Impact elasticity for 10ХН3МДЛ steel treated with SWMgenerator increased by more than 50% both at +20° С and
at -50° С with keeping the same strength characteristics.
Along with thermal treatment correction it allowed
significant rise of σт and σвр at given values of impact
SWM field treatment allowed to rise mechanical properties of
35ХГСЛ steel up to those of 10ХН3МДЛ steel, whose price is 7
times higher that that of 35ХГСЛ. After SWM field treatment
cast properties of the steels also change. Liquid flow ability of
cast steels increases, what leads to reduction of cast rejects.
Fig. 5 Microstructure of the samples of treated (I) and not
treated (II) 10ХН3МДЛ steel with different magnification:
a – x 517, b – x 1300, c – x 2200, d – x 4200
White open-hearth pig iron, pigs of half-product for metallurgical industry
Reference sample 34-2
cracks, cavities
SWM treatment, sample 38
absence of cracks and cavities
SWM treatment allowed to decrease the percentage of losses (chips)
onder multiple reloads.
List of the enterprises where the researches were carried out
In arrow of years the researches had been carried out at following Russian enterprises.
Metallurgical industry:
JSC “Motovilikha Plants”, Perm
JSC “Tulachermet”, Tula
JSC “Seversky Pipe Plant”, Polevskoy
JSC “Uralmash”, Yekaterinburg and others
Aviation industry:
JSC “Perm motors”, Perm
FSUE “Salut”, Moscow
CRB named after Ilyushin, Moscow
JSC “NovosibNIAT”, Novosibirsk
Research institues
CNIIKM “Prometeus”, St. Petersburg
Physical and Technical institute of UD RSA, Izhevsk
Scientific centre of powder materials, Perm
We have at hands all research and manufactory reports.
Alternative methods.
Metallurgy knows different ways of physical fields’ influence on metal melts for changing their micro and macro structures,
increasing uniformity of metals and their mechanical properties, decreasing the percentage of metallurgical rejects.
Most common method is electromagnetic agitation on induction furnaces and continuous casting plants. While melting in
induction furnace, electromagnetic field is not only the source of thermal energy, but it intensively agitates the metal melt.
This agitation effectively equalizes chemical composition of the melt.
Electromagnetic agitation in induction furnaces has no noticeable influence on micro and macro structures of the metal.
With electromagnetic agitation in continuous casting plants changing of the direction of crystallization fronts takes place and
metal takes crystallization with more small micro structure than without agitation; excessively large crystals are not created,
liquation processes are lessening and the metal becomes more uniform both chemically and structurally. All this leads to
increasing the quality of the metal.
The limitations of this method is big consumption of electric energy, as strong electromagnetic field in the conditions of
intensive dissipation demands big powers and relatively big cost of the electromagnetic plant and it’s maintenance. In
addition, electromagnetic agitation in actual manufacturing does not influence on the micro structure of metal.
Another method if influence is ultra sound treatment of metal melt. Ultrasound treatment significantly disintegrates both micro
and macro structures, ensures high uniformity of the metal and eliminates impurities from the melt.
The limitation of this method is intensive erosion of vibrating surfaces working in the melt, which leads to premature wearing
of working tools and of cladding of melting unit. Also there is contamination of the metal with products of erosion. It all leads
to not so wide usage of this method.
One more original method of metal melt treatment was proposed.
Non-conductive ceramic bowl with metal melt is placed into the stator of powerful electro motor, where the metal was taking
influence of rotating magnetic field. Such a treatment gave good results in uniformity of the ingot, disintegration of metal’s
micro and macro structures and improvement of its mechanical properties.
Limitation of this method is impossibility to treat significant volumes of metal as with increase of the volume of the melt the
cost of the stator increases intolerably. Above all the building of reliable multi-ton non-conductive metallurgical bowl is of
great difficulty in present time.
Alternative methods.
Method of electronic-rays melting is well proved and is widely used at this moment. Industrial metal of highest quality for most sensible
parts is produced in electronic-rays furnaces.
Limitations of this method are high cost of the plant and high expense of each melting, as the melting demands creating of deep,
electronic tube-like vacuum. The volume of the melt is extremely small. The most powerful furnaces built in the USSR have the powers
of only 100 kW (Gubakha city, Permsky Krai) and 300 kW (Novosibirsk city).
The method, alternative to electronic-rays melting is also widely used method of electro-slag melting. With electro-slag treatment the
drops of metal, dropping from melting electrode passes through the layer of slag, shunts the current in the plant which results in
chemical binding of contaminants with slag melt in high temperature conditions. In addition, as is marked in [2], during electronic-rays
or electro-slag melting metal takes significant over-heating. It is heated up to the temperatures close or equal to its secondary melting
values what leads to uniform distribution of alloying elements in the melt. It results in improvement of mechanical properties of the
metal and metal produced with electro-slag melting approaches by its properties to that produced with electronic rays melting method.
Unfortunately, the electro-slag method does not influence on disintegration of micro and macro structures and the metal produced
with electro-slag method needs further straining.
Other methods if influencing on metal melts for improving mechanical properties were tested in laboratory conditions. For instance,
there were experiments in inducting high voltage potential to solidifying ingot, in irradiating the melt with high-frequency, very high
frequency, ultra high frequency and X-ray emissions. All these methods got no further development, as the results did not proved to be
workable due to big expenses or danger to personnel’s health.
Method of SWM treatment of the melts has big preferences in comparison with above mentioned methods:
- Power consumption is rather insignificant, as SWM-generator consumes power not more than 200 – 300 W.
- Method of SWM treatment does not need any alteration of existing production facilities and manufacturing cycle and it does not
intervene manufacturing process in any way.
- Method of SWM treatment is able to change the activity of chemical elements in definite limits and thus to control the phase
composition of the metal, what is not possible neither with any of mentioned above methods nor with any other method except for
changing chemical composition of the metal.
- The volume of the melt to be treated is not limited. SWM-generators were tested in melts from 70 gr. to 400 tons.
- SWM-generator is little and relatively simple device, production of which does not require any big financial expenses.
Sometimes the limitations of SWM treatment are spending time for finding regime of the treatment, for choosing modifier matching
with specific type of the metal and for determining the frequency row. With big enough number of experiments it was always possible
to choose the best regime for metal treatment. Sometimes it’s necessary to make a correction in thermal treatment regime for specific
types of the steels as often lowering of critical points Ac1 and Ac3 down to 50 - 55°С was observed for ordinary and low-alloyed types of
the steels.
Using of wave treatment of the melt with the help of SWM generator allows to
get: guaranteed improvement of metal’s structure which in turn allows to review
the regimes of thermal treatment, significant increase of strength and plasticity
characteristics of metal allowing the use of less alloyed and more cheap types of
steels and pig iron, increase of wear resistance of such products as forming rolls at
least of 20%. Implementation of this process will demand “through” technology:
Liquid steel – SWM treatment – pouring – forging.
Above metallurgy, SWM technology can be used for:
- refining oil products and liquid industrial wastes.
Preliminary experiments were conducted:
- in agricultural field for increasing the crops of agricultural plants
- for water treatment for it’ purification and increasing it’s properties.
In the field of metallurgy, as in other fields deep researches with participance of
specialists of Academic institutes are required.
List of publications and patents
Klyuev A.V., Kurapov S.A., Panov V.F., Strelkov V.V., Kokareva N.A., Boyarshinov A.E. “Structure and
mechanical properties of metal after treating the melt in non-stationary electromagnetic field of wave
emitter”. Adaptive metallurgy and thermal treatment of metals – №7 (649) – 2009 – pages 3 – 9.
Boyarshinov A.E., Klyuev A.V., Kokareva N.A., Kurapov S.A., Panov V.F., Strelkov V.V. “Method of
melted materials treatment”. Patent 2324575, Russia, MPK B22D27/02, Non-commercial partnership
“Non-organic Materials (RU). Application: 2006140015/02, 13.11.2006, Published 20.05.2008. Bulletin
Boyarshinov A.E., Klyuev A.V., Kokareva N.A., Kurapov S.A., Panov V.F., Strelkov V.V. “Electromagnetic
antenna”. Patent 2336612, Russia, Non-commercial partnership “Non-organic Materials (RU).
Application: 2006134358/09, 28.09.2006. Published 20.10.2008. Bulletin №29.
Kurapov S.A., Panov V.F. “Deep field influence on metal melts”. Works of international inter-discipline
symposium “Fractals and applied synergetic” FiPS – 03 (November 17 – 20 2003, Moscow.) – Moscow:
MGOU Publishing 2003. – page146.
Klyuev A.V., Kurapov S.A., Panov V.F., Strelkov V.V., Kokareva N.A., Boyarshinov A.E. “Deep field
influence on metal melts”. Deformation and Fracture of Materials and Nanomaterials – DFMN – 2007.
Book of articles, ed. by O.A. Bannykh et al. – Moscow: Interkontakt Nauka, 2007. Page 144.
Panov V.F., Kurapov S.A. “Deep field influence on metal melts”. Cosmos, time, energy. Book of articles
dedicated to 100th anniversary of D.D. Ivanenko – Moscow, “Belka” – 2004 – pages 289 – 294.
Klyuev A.V., Kurapov S.A., Panov V.F., Strelkov V.V., Kokareva N.A., Boyarshinov A.E. “Improvement of
physical and mechanical properties of ferrous and non-ferrous metals with melt treatment in nonstationary field of wave emitter”. Report thesis. Sixth international aerospace congress. IAC-09.
(August 23 – 27 2009, Moscow, Russia). Page 108.
Name: Panov Vyacheslav Feodorovich
e-mail: [email protected]
Scientific degree: Doctor of Physical and Technical Science in theoretical physics
Education: Perm State University, Mechanical and Mathematical faculty
Scientific rank: Professor
Organization: PGNIU, professor of cathedras: Highest mathematics, Algebra and geometry, Control processes and informational security,
Mathematical analysis, Philosophy.
Post: Teacher
Professional achievements: Corresponding member of Russian Academy of Natural Sciences, Member of presidium of Russoan Gravitation
Name: Kurapov Sergey Arkadyevich
e-mail: [email protected]
Education: Perm State University, Mechanical and Mathematical faculty
Organization: JSC “A-1136”
Post: Leading scientific collaborator, Chief of laboratory
Professional achievements: Specialist in technical physics
Name: Kokareva Nadezhda Antonovna
e-mail: [email protected]
Education: Ural State University, Sverdlovsk
Organization: CJSC “Ural Project”
Post: Director
Professional achievements: Specialist in geology
Name: Boyarshinov Andrey Yevgenyevich
e-mail: [email protected]
Education: Perm Polytechnical Institute, Electrotechnical faculty
Organization: JSC “A-1136”
Post: Director
Professional achievements: Specialist in radio communications