International Scientific-Technical and Production Journal
November
2012
# 11
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
. Brazing of
titanium alloys by using aluminium-base filler alloys .............................. 2
. Structure and
properties of welded joints on titanium alloys containing silicon
additions ............................................................................................. 6
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
. and
. and
. Combined laser-microplasma cladding
with powders of Ni—Cr—B—Si system alloys ........................................... 16
. Thermodynamic analysis of
slag melts in manufacture of fused welding fluxes ............................... 23
INDUSTRIAL
. and
. Repair welding of
intermediate cases of aircraft engines from high-temperature
magnesium alloy ML10 with application of electrodynamic
treatment ........................................................................................... 28
. and
and
. Procedure for calculation of
dimensions of nozzles in welding using two separate gas jets .............. 33
.
. Braze-welding with weld metal peening
during its solidification ........................................................................ 37
. Comparative analysis of ISO 18841:2005
standard and RF 26389—84 standard on evaluation to hot
crack resistance in welding ................................................................. 41
State Registration Certificate
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© PWI, International Association «Welding», 2012
. and
. Multichannel microprocessor controller for data collection
from thermocouples ............................................................................ 45
. Technological innovations – basis for
increase of competitiveness of the U.S. welding production ................. 48
NEWS
.
and
. Experience of application of HF electric
welding apparatus EK-300M1 in surgery ............................................. 53
Scientific-Technical Conference «Modern Problems of
Metallurgy Technology of Welding and Surfacing of Steels and
Non-Ferrous Metals» .......................................................................... 56
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Стр.1
BRAZING OF TITANIUM ALLOYS
BY USING ALUMINIUM-BASE FILLER ALLOYS
V.F. KHORUNOV, V.V. VORONOV and S.V. MAKSYMOVA
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
Investigations on brazing of titanium alloy samples by using different compositions of aluminium filler
alloys were carried out. Silicon-free aluminium filler alloys were found to be acceptable for producing the
brazed joints on titanium alloys. The 670—690 °C brazing temperature range is optimal for the selected
filler alloys.
Keywords: brazing, titanium alloys, aluminium alloys,
commercial brazing filler alloys, wetting, microstructure,
mechanical properties
Since the 1960s, Al-base filler alloys have been
widely used for brazing of titanium alloys. Pure
aluminium or alloys of the Al—Si, Al—Si—Cu and
Al—Mg systems are mainly applied as brazing
filler alloys [7]. Compositions of some Al-base
filler alloys are given in Table 1.
Key advantages of aluminium filler alloys are
low melting temperature, low specific weight,
good compatibility with titanium alloys base
metal and, in particular, good wetting and flowing
into the gap. Therefore, special consideration
has been given to the aluminium filler alloys
since the time when the Ti-base alloys have found
application in aerospace engineering.
An important drawback of the Al-base filler
alloys is their active reaction with the base metal.
Even a relatively short time of contact of titanium
with molten aluminium may lead to a deep erosion
of the base metal. Silicon is added to the
Al-base filler alloys to reduce reactivity of pure
Table 1. List of standard aluminium-base brazing filler alloys
Grade of filler alloy
Manufacturing
country
AD1
AL2
AVCON 48
AA3003
TiBrazeAl-600
TiBrazeAl-630
TiBrazeAl-640
TiBrazeAl-642
TiBrazeAl-645
TiBrazeAl-655
TiBrazeAl-665
USSR
Same
USA
Same
»
»
»
»
»
»
»
© V.F. KHORUNOV, V.V. VORONOV and S.V. MAKSYMOVA, 2012
2
11/2012
aluminium and decrease the brazing temperature
(hence, decrease the probability of formation of
intermetallics). But in this case silicides may
form at the titanium alloy—filler alloy interface.
However, the main problem is the Al2O3 film on
the aluminium filler alloys, which prevents their
spreading over the base metal.
Despite a large amount of the investigations
conducted in Eastern Europe and particularly in
Ukraine to study brazing of titanium by using
aluminium filler alloys, brazing of titanium with
this type of the filler alloys failed to receive acceptance.
There are publications on development
of new aluminium filler alloys for brazing of titanium
alloys [7], this evidencing the industrial
demand for commercial medium-melting point
filler alloys for brazing of titanium and its alloys.
Wide application of aluminium filler alloys
in this case is hindered by a low strength of the
resulting brazed joints, which is much lower than
that of the joints brazed with titanium filler alloys.
One of the promising areas of using aluminium
filler alloys is brazing of lamellar-ribbed
thin-walled structures and thin-walled honeyComposition
of filler alloy
Al—0.4Si—0.3Fe
Al—13Si
Al—4.8Si—3.8Cu—0.2Fe—0.2Ni
Al—1Mn—0.6Si—0.7Fe
Al—12Si—0.8Fe
Al—1.5Mg—4Cu—2Ni
Al—(4.4—5.2)Mg—(0.7-1)Mn—0.2Cr
Al—5.3Si—0.8Fe—0.3Cu—0.2Ti
Al—(4.3—5.5)Mg—0.25Si—0.4Fe—0.2Ti—0.2Cr
Al—6.3Cu—0.3Mn—0.2Si—0.2Ti—0.2Zr
Al—2.5Mg—0.2Si—0.4Fe—0.2Cr
Tbr, °С
665
560—700
610—680
660—670
590—610
630—660
640—660
650—680
640—660
650—670
660—680
Стр.2