«Steel Work»
We are experts in welding
Bimetal Plates Produced by
Steel Work LLC
with High-impulse Cladding
Method
2014
High-impulse Method for Bimetal Production
Steel Work LLC is a constantly growing company that does not stop searching for new
solutions in various fields of science and technology. In 2013 the company together with
the specialists of Paton Welding Institute introduced a new stage of development – highimpulse method (explosion welding) for production of bimetals. Welding parameters for
such compositions as “carbon steel + stainless steel”, “steel + copper”, “steel + brass”,
“steel + titanium”, and “steel + aluminum” have been developed. Based on these
achievements, we have fulfilled first contracts on tube sheets cladding.
High-impulse method for production of bimetals is the process that does not need outer
heat source. Strong bond between dissimilar metals is formed due to mechanical energy of
colliding plates. That is why the method can be considered as “cold” method of welding.
Heat affected zone, when optimal welding parameters are applied, is very small as well as
time of high temperature influence. It means that, theoretically, it is possible to get the
bond between almost all dissimilar metals and alloys.
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2
High-impulse Method for Bimetal Production
High-impulse method of bimetal production (explosion welding) is a unique
process that allows to get the continuous bond between two or more surfaces of metals at
the area of tens square meters.
Using this method, it is possible to join virtually all metals and alloys that are applied in
industry. Typically, the bond strength is more than strength of weaker metal or alloy in a
composition.
The method is used for cladding of flat plates as well as of cylindrical surfaces.
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Explosion Welding Process
1
2
4
Parallel scheme of explosion welding
process:
1. Flyer plate.
2. Interface.
3. Base plate/.
4. Explosive charge.
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When explosive charge is initiated, detonation wave travels with a velocity D. Separate
sections of flyer plate consistently acquire a velocity of several hundreds meters per a
second due to the influence of high pressure expanding explosion products. A flyer plate
bends to a certain angle forming oblique impact to a base plate. An additional cleaning of
surfaces, their activation, and forming of joint at the velocity Vк with straight or wavy
interface occurs as a result of such oblique impact.
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Benefits of High-impulse Cladding Method
1. The joint is formed almost instantly. It occurs due to the formation of metallic bonds as a
result of plastic deformation of welded metal surfaces. Short duration of the welding
prevents diffusion process. This allows to weld metal combinations, which form
undesirable metallographic phases such as brittle intermetallic compounds when
conventional welding processes are applied. High-impulse method of cladding can be
used over large areas that are limited only by the size of sheets to be jointed.
2. Optimal welding process does not change the structure and properties of the original
sheet metal except for narrow contact zone. Typically, after the explosion welding
bimetal sheets are subjected to heat treatment for stress relief to improve the plastic
properties and allow further operations such as flattening, bending, and forming.
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Benefits of High-impulse Cladding Method
3. When optimal parameters are applied, mechanical properties of bimetal, in particular
tensile strength and shear strength, is higher than they are for weakest component of the
composite. Properties of explosively clad bimetals satisfy the requirements of GOST
10885, ASTM A263, A264, A265, EN 13445-2.
4. Several studies of mechanical properties (static strength, impact and cyclic loading,
thermal cyclic loading) as well as corrosion resistance of clad sheets proved that
explosively clad bimetal can be allowed to use in critical applications in the energy,
chemical, petrochemical, and other industries of modern engineering.
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Explosively Clad Samples
Cladding layer
Base layer
The bimetal plate (or pipe) obtained by high-impulse method is the composition, in
which mechanical strength is provided by base layer of cheap alloys, whereas cladding
layer of stainless steel, titanium, brass, zirconium, and other alloys provide corrosion or
thermal wear resistance.
The thickness of the base plate can range from 1 mm to several hundreds mm. The
thickness of cladding may be up to 30 mm. Plate size is limited to the standard one, but it
can be increased by welding.
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The Sphere of Application for High-impulse
Cladding Method
Prospects and the applications of high-impulse cladding method are wide and
determined by the ability to make solid phase reliable joints. This allows to use the method
for:
- petrochemical and energy machine-building branches for manufacturing of vessels,
reactors, columns, heat exchangers, electrolytic baths, high current conductors that
operate under the simultaneous influence of temperature, pressure and corrosion
environment;
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The Sphere of Application for High-impulse
Cladding Method
-
pulp and paper industries for manufacturing of digesters, waste tanks, heat exchangers,
mixers, etc.;
-
light and food industries for manufacturing of equipment for milk plants, fermentation
tanks, dryers;
-
military industry for improving durability of tank and artillery barrels, making armor parts,
etc.;
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The Sphere of Application for High-impulse
Cladding Method
-
aviation and aerospace industries for manufacturing of transition pieces between dissimilar
metal elements;
-
shipbuilding for manufacturing of hull transition pieces such as “aluminum + steel”.
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Thank you for your attention!
Steel Work LLC is a steadily growing company.
There are no problems for us!
We are working for your business has become even more
successful!
If you are interested in our products, we will gladly and promptly provide you with
additional information and invite you to visit our company . If you already have a concrete
offer, we would be grateful if you send us a completed questionnaire, which can be found on
our website.
© Steel Work LLC 2014. All rights reserved.
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Steel Work LLC
Mira avenue 50/32,
Krivoy Rog,
Dnepropetrovsk region,
50069 Ukraine,
www.steel-work.net
Contacts:
- sales department
tel/fax: +38(056)470-19-29;
Executive CEO
Igor Bardatskiy
mob. tel. +38(098)9838888,
i.bardatskiy@steel-work.net.
Manager of regional development
Denis Grishan
mob. tel. +38(067)5434161,
d.gryshan@steel-work.net.