Explosion welding

Explosion welding and hardening are a special metal forming processes which use power of explosives to create or enhance metal structures.

Explosion welding is a process where welding is accomplished by accelerating one of the components at extremely high velocity using explosives. Explosion welding can produce a bond between two metals that cannot be welded by conventional means. The process does not melt either metal. Instead it drives the surfaces of both metals to come into intimate contact sufficient to create a weld. Large areas can be bonded easily and the weld itself is clean, due to the fact that the surface material of both metals is violently expelled under the force of collapsing cavity.

OZM Research is capable of developing and manufacturing of explosion-welded bimetallic and multilayer metallic materials. Components are usually produced in close cooperation with the customer. OZM Research also offer development of production technology for selected products based on application of explosion effects as explosive forming, hardening or welding both metallic and ceramic materials

APPLICATION

Semi-products for manufacturing the tube plates for heat exchangers

These semi-products are manufactured in combinations of carbon and low-alloyed steels with corrosion-resistant steels, copper and copper alloys, titanium, aluminum and aluminum alloys, nickel and nickel alloys etc. The cladding may be one-sided or on both sides, usually in the whole area.

Bimetallic or multilayer sheets

Materials for manufacturing the vessels to be used in energetics, chemical and foodstuff engineering are produced in all sorts of combinations. The multilayer materials are produced for special purposes according to customer’s requirement.

Bearing materials

Antifriction alloys (tin or aluminum bronzes) in the form of sheets (strips) are clad on the carbon steel base usually. Resulting products are used in manufacturing the bearing shells, bearing plates, semi-products for elements for hydraulic-system components, etc.

Wear resistant materials           

Hadfield’s austenitic manganese steel, a classical wear-resistant material, is clad with the carbon steel, which makes it possible to weld the resulting material to steel structures using standard procedures.

Workpieces to be rolled down

Blooms or billets clad on one or on both sides destined to hot or cold rolling-down operation are prepared in combinations of carbon steel – corrosion resistant material, titanium, copper and copper alloys or nickel and nickel alloys. This category comprises combinations of various alloys of copper and silver for utilization in electrical engineering.

Structural transition joints

Bimetallic or multilayer construction parts designed for subsequent fusion welding-in between two materials that are not interweldable by a standard procedure. The most usual is combination   carbon steel-aluminum for electrotechnical purposes or e.g. for connecting of steel ship structure with aluminum deck elements, and  the combination corrosion resistant steel – copper – AlMn1 alloy for tube flanges in cryogenics. It is also possible to prepare tubular transition joints.

Semi-products for glass moulds

They are produced in the shape of plates, blocks and disks with one side clad with pure nickel or austenitic high-alloy chromium-nickel steel. The base material is, as a rule, the structural soft carbon steel. It is possible to combine the resistance of functional layer with thermal conductivity of the base, which results in substantial savings of nickel and nickel alloys. These semi-products find their application in manufacturing of moulds for manual pressing of glass stones.

Tube to tube-plate explosive welding and fixing

Explosive welding and fixing of tubes to tube-plates can be accomplished in a wide variety of geometrical and material combinations.

Labyrinth coolers

By the method of explosive cladding of copper or steel plates with milled out labyrinth of arbitrary form, with copper or steel sheet, the plate shaped (or cylinder-shaped) coolers are prepared, designed for continuous or semi-continuous casting of non-ferrous metals or steel.

Lining-up of the socket pipes and sheathing of the rods or the shafts (Jacketing)

Most frequent application is lining-up of the socket pipes with corrosion resistant materials. The shafts can be jacketed e.g. with suitable antifriction material. Bimetal rods of circular cross section can be prepared in various material combinations.

order of the questions about Explosion welding

OZM Explosion processing of materials Explosion welding
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