Voestalpine Böhler Welding
Hundreds of products for joint welding in Various arc welding processes are available in a product portfolio that is unique throughout the world. Creating lasting connections is the brand‘s philosophy in welding and between User Industry.
Shielded metal arc welding (SMAW), also known as manual metal arc welding (MMA or MMAW) or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux for welding.
An electric current, in the form of either alternating current or direct current from a welding power supply, is used to form an electric arc between the electrode and the metals to be joined. The base metal and the electrode melts forming weld pool that cools to form a joint. The flux coating of the electrode disintegrates, giving off vapors that serve as a shielding gas and providing a layer of slag, both of which protect the weld area from atmospheric contamination.
Flux-cored arc welding (FCAW or FCA) is a semi-automatic or automatic arc welding process. FCAW requires a continuously-fed consumable tubular electrode containing a flux and a constant-voltage or, less commonly, a constant-current welding power supply. An externally supplied shielding gas is sometimes used, but often the flux itself is relied upon to generate the necessary protection from the atmosphere, producing both gaseous protection and liquid slag protecting the weld. The process is widely used in construction because of its high welding speed and portability.
GMAW stands for gas metal arc welding. This is also commonly referred to as metal inert gas welding, or MIG welding. In GMAW the electrode is a roll of wire which the welder feeds out of a Welding Torch to the work piece. You control the speed of the wire, so you can make long welds without stopping to replace a rod. This type of welding is generally considered to be the easiest to learn. The gun also feeds out an inert gas such as Argon or CO2 to displace oxygen at the weld site. This means you don’t have any slag to chip away, but you do need a tank and regulator to go with a MIG welder.
Submerged-arc welding (SAW) involves the formation of an arc between a continuously fed wire and the workpiece. A blanket of powdered flux creates a protective gas shield and a slag for the weld zone. A shielding gas is not required. The arc is submerged beneath the flux blanket and is not normally visible during welding.
SAW is normally operated in the automatic or semi-automatic mode. The process is normally limited to the flat or horizontal-fillet welding positions.
Fontargen Brazing provides the best brazing and soldering solutions based on proven products with German technology. The expertise of this brand’s application engineers has been formulated over many years of experience from countless application cases.
The very basics of brazing are defined by the joining of metals through the use of heat and a filler metal—one whose melting temperature is above 840°F (450°C) but below the melting point of the metals being joined.
Brazing is probably the most versatile method of metal joining today, for a number of reasons:
Brazed joints are strong: On nonferrous metals and steels, the tensile strength of a properly made joint will often exceed that of the metals joined. On stainless steels, it is possible to develop a joint whose tensile strength is 130,000 pounds per square inch. (896.3 megapascal [MPa]).
Brazed joints are ductile: able to withstand considerable shock and vibration.
Brazed joints are usually easy and rapidly made: Operator skill is readily acquired.
Brazing is ideally suited to the joining of dissimilar metals: You can easily join assemblies that combine ferrous with nonferrous metals, and metals with widely varying melting points. Brazing is essentially a one-operation process. There is seldom any need for grinding, filing or mechanical finishing after the joint is completed.
Brazing is performed at relatively low temperatures: Reducing the possibility of warping, overheating or melting the metals being joined.
Brazing is economical: The cost per-joint compares quite favorably with joints made by other metal joining methods.
Brazing is highly adaptable to automated methods: The flexibility of the brazing process enables you to match your production techniques very closely to your production requirements.
Decades of industry experience and application know-how in the areas of repair of cracked material, anti-wear and cladding, combined with innovative and custom-tailored products, guarantee customers an increase in the productivity and protection of their components.
UTP Maintenance provides products and services through a team of welding engineers who stand at the customer’s side, providing advice and support in all matters related to the welding technology.
Repair welding is a commonly used technique in which the cracked material is removed by arc gouging and the element is welded to re-join the material on either side of the crack.
UTP Maintenance offers a full range of covered electrodes for repair of cracked material unalloyed, fine grained and low-alloyed steels, stainless steels, nickels alloys, cast iron and copper alloys.
Hardfacing is a welding process used to apply a material with increased hardness, ductility, erosion-resistance, and/or corrosion-resistance relative to the base (parent) material. It is also commonly referred to as cladding or hardsurfacing. Due to hardfacing materials improved properties, a part’s service life is prolonged. Hardfacing can be applied to new part to offer a value-added feature, or it may also be applied to repair previously deteriorated parts.
UTP Maintenance offers a full range of covered electrodes for Hardfacing applications.