International Scientific-Technical and Production Journal
January
2012
# 1
English translation of the monthly «Avtomaticheskaya Svarka» (Automatic Welding) journal published in Russian since 1948
Editor-in-Chief B.E.Paton
Yu.S.Borisov V.F.Khorunov
A.Ya.Ishchenko I.V.Krivtsun
B.V.Khitrovskaya L.M.Lobanov
V.I.Kyrian A.A.Mazur
S.I.Kuchuk-Yatsenko
Yu.N.Lankin I.K.Pokhodnya
V.N.Lipodaev V.D.Poznyakov
V.I.Makhnenko K.A.Yushchenko
O.K.Nazarenko A.T.Zelnichenko
I.A.Ryabtsev
CONTENTS
SCIENTIFIC AND TECHNICAL
. and
. and
. Efficiency of electrodynamic
treatment of aluminium alloy AMg6 and its welded joints ................ 2
. Risk of failure in thinning of
main pipeline wall at the area of circumferential welds in
the presence of bending moments along the pipeline axis .............. 6
. and
N.P.Alyoshin (Russia)
U.Diltey (Germany)
Guan Qiao (China)
D. von Hofe (Germany)
V.I.Lysak (Russia)
N.I.Nikiforov (Russia)
B.E.Paton (Ukraine)
Ya.Pilarczyk (Poland)
G.A.Turichin (Russia)
Zhang Yanmin (China)
A.S.Zubchenko (Russia)
V.N.Lipodaev, V.I.Lokteva
A.T.Zelnichenko (exec. director)
A.A.Fomin, O.S.Kurochko,
I.N.Kutianova, T.K.Vasilenko
N.A.Dmitrieva
D.I.Sereda, T.Yu.Snegiryova
. Investigations
on laser beam welding of high-manganese austenitic and
austenitic-ferritic stainless steels .................................................. 10
.
and
. Increasing wear resistance of titanium
by argon arc overlaying ................................................................ 15
. and
.
Combined diffusion process of joining bimetal elements of
heat exchange system ................................................................. 18
.
and
. Influence of vibration of parts on
structure and properties of metal in surfacing ............................... 23
. and
INDUSTRIAL
. Tendencies in development of control
of metal transfer processes in shielding gases (Review) ................ 29
. and
. Cladding flux-cored strips
State Registration Certificate
KV 4790 of 09.01.2001
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© PWI, International Association «Welding», 2011
(Review) ...................................................................................... 34
. and
. Computer system for
calculation of norms of consumption of welding
consumables for manufacture and repair of steel pipelines ........... 39
. and
. and
. Influence of
surfactants on phase formation during production of
Al—Cu—Fe system powders for thermal coatings by the
method of mechanochemical synthesis ........................................ 48
Thesis for a scientific degree ........................................................ 51
.
Thermal spraying of pseudo-alloy coatings (Review) ..................... 41
BRIEF INFORMATION
. Manufacture of
stainless steel—aluminum transition pieces by vacuum
pressure welding method ............................................................. 26
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Стр.1
EFFICIENCY OF ELECTRODYNAMIC TREATMENT
OF ALUMINIUM ALLOY AMg6 AND ITS WELDED JOINTS
L.M. LOBANOV1, N.A. PASHCHIN1, A.V. CHERKASHIN1, O.L. MIKHODUJ1 and I.P. KONDRATENKO2
1E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
2Institute of Electrodynamics, NASU, Kiev, Ukraine
The evaluation of parameters of pulsed current and dynamic pressure at electrodynamic treatment was performed, based
on the developed experimental procedure. The influence of charge voltage and capacitance of capacitors on relative
effectiveness of electrodynamic treatment was studied. It was established that maximum values of pulsed current and
its increment rate are directly dependent on applied charge voltage, while the rate of dynamic pressure increment is the
power function of a pulsed current.
Keywords: welded joints, aluminium alloy, electrodynamic
treatment, primary stresses, decrease of resistance to deformation,
relative efficiency of treatment, pulsed current, dynamic
pressure, charge voltage, capacitance of capacitors,, welding
stresses
The electrodynamic treatment (EDT) based on the combined
pulsed effect of electric current and dynamic load
on current-conducting materials is a challenging method
to control the stressed state of metal structures [1].
Up to now the investigations of mechanisms of the
EDT effect on stressed state of aluminium alloys [2],
structural steels [3, 4], and also welded joints of these
materials were carried out. The peculiarities of
changes of micro and macrostructures [5], plastic deformation
[6] and residual shape changing [7] of metals
and alloys under influence of a pulsed current,
initiated at EDT, were studied. The results of investigations,
presented in the works [1—7], were obtained
using the developed experimental procedure based on
tension of flat specimens of «blade» type, their treatment
by current pulses with in-process control of dropping
the tension force, which was taken as an evaluative
characteristic of EDT.
However, no attention was paid to the study of
effect of such parameters of EDT as values of pulsed
electric current and dynamic force on efficiency of
this process.
The aim of this work is investigation of efficiency
of eletrodynamic effect during treatment of aluminium
alloy AMg6 and its welded joints depending on electric
and dynamic parameters of EDT.
To form the pulse of electric current, the pilot-industrial
installation was used presented in the work
[4]. The supply of a pulsed current to the surface of
metal was performed using copper electrode in the
way that the specimen being treated is connected to
the discharge circuit of the capacitor storage. Here,
in the process of passing the discharge current the
electric pulsed processes in the current-conducting material
being treated are initiated, connected with the
mechanism of electric plasticity [1]. Besides, a special
design of electrode device transfers impact effect into
the material being treated.
The working tool includes a current-conducting
Figure 1. Schematic diagram of working tool for EDT: C – battery
of capacitors; Com – commutator (for designations see the text)
2
striker 1 with a hemispheric edge (Figure 1). The
design peculiarities of the tool allow changing the
length of electrode stickout 1 by adjusting gears 6, 8
and screw 7 relatively to the surface of welded joint
2 which is the receiver of the electrodynamic effect.
The working tool includes also an inductance coil 11,
connected to the discharge circuit of the capacitor
storage and defining the duration of a current pulse.
The coil is arranged in the working tool above the
disc 4 of non-ferromagnetic material.
The interaction of magnetic field of inductance
coil and field of induced currents, caused by passing
the current pulse along the winding, leads to the appearance
of electrodynamic force trying to push out
the disc from the coil, here the current-carrying electrode,
rigidly connected to a disc, transfers the electrodynamic
effect to the surface of material being
treated. The superposition of electric plastic and dy©
L.M. LOBANOV, N.A. PASHCHIN, A.V. CHERKASHIN, O.L. MIKHODUJ and I.P. KONDRATENKO, 2012
1/2012
Стр.2