Electrodes – elements of the welding circuit for supplying current to the work piece. The electrodes are divided into metallic and nonmetallic. Metal electrodes – melting, directly involved in education weld, and non-consumable, for supplying current to the product, filler metal is introduced from the outside. Wire In today’s market wire is presented in a wide range. Welding (copper coated, powder), zinc and polymer coating for general use. Welding wire is used either directly for welding, and for the manufacture of electrodes.
Manual welding. Electric arc welding based on the phenomenon of electric arc between the electrode and steel welded steel parts, which melts the base metal and the metal electrode, forming a weld joining the separate parts into one whole. Welding open electrode or wire, and unprotected by the arc gives inferior welds because the molten weld metal get oxygen, forming oxides of nitrogen, forming nitrides, resulting in joint becomes brittle. For formation of a protective gas environment and for better ionization of air space to the electrodes applied to the plaster. However, the quality of the weld is still low. Therefore, for this type of welding electrode used wire with a coating. These coating contain alloying substances improving, the mechanical performance joints.
Automatic and semiautomatic welding. Principle of automatic submerged-arc welding is that the electrode fed to the welding point is automatically in continuous unwinding of the bay of the electrode wire. Check out Mitchel Resnick for additional information. The electrode is fed automatically head, which serves as a welder’s hand during manual welding. Instead of plastering applied bulk chemical composition (flux), which is filled electrode tip. Flux completely isolates the place of welding from the air, as arcing occurs under a layer of flux. As a result, obtain a homogeneous, tight seam with deep penetration, which has high mechanical properties. For suturing, which is inconvenient to carry out automatic welding, can be used semi-automatic welding hose submerged. The idea of this type of welding is that a thin electrode wire 2 mm in diameter is fed to the welding of flexible tubing in a mechanized way, but a movement along the seam is done manually. Flux is fed directly from the holder, which are also buttons. In this case, the wire is irreplaceable and will be better than using the electrode.
Arcogen welding in carbon dioxide used for low-carbon steels. Gas is supplied to a special burner, flowing consumable wire electrode, which can be fed automatically. Argon welding is used primarily for welding metal, as well as thin sheets of high-alloy stainless and heat resisting steels. Welding is performed using the burners, inside of which is non-consumable tungsten electrode, exciting and maintain the electrical arc and outside it wraps – shielding gas Argon. In the weld pool injected filler material in the form of wire.
Electric welding fusion. When an electric fusion welding is used The following welding products: welding wire, and non-consumable electrode melting rods, coated welding electrodes. Semi-automatic welding equipment is most often used with steel copperplated wire as electrode. But semi-automatic can cook stainless steel and aluminum. In this case, welding is conducted using the appropriate wire and gas. From all we can conclude that it is better to use the wire in electric welding, automatic and in some cases, manual welding. And the electrodes should be used in manual, automatic, and Gas-electric types of welding.