Metal Inert Gas (MIG) welding or Metal Active Gas (MAG) welding, is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun. A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used. There are four primary methods of metal transfer in GMAW, called globular, short-circuiting, spray, and pulsed-spray.
Tungsten Inert Gas (TIG) welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually an inert gas such as argon), and a filler metal is normally used, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma.
Manual Metal Arc (MMA) welding, is a manual arc welding process that uses a consumable electrode coated in flux to lay the weld. 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. As the weld is laid, 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.
Connections between elements are distinguished: Welded joints - Welded joints are the most perfect permanent link. The strength of welded joints under static and shock loads brought to the strength of parts from a variety of metal. Also spread: Riveted joints and Bolted connections methods.
Metal constructions of different alloy are widely used in different layers of building projects and areas of human activity. In building, machine tools, scale projects. Metal and steel have own properties and many advantages in comparison with other building elements. The basics advantages are: * High durability: metal construction can hold high weights; * Lightness (in case of aluminum); * Corrosion Stability; * Manufacturability; * Quick Installation; * Reliability of metal and constructions (determined by the relatively high uniformity of mechanical properties of steel).
Metal constructions of different alloy are widely used in different layers of building projects and areas of human activity. In building, machine tools, scale projects. Metal and steel have own properties and many advantages in comparison with other building elements. The basics advantages are: * High durability: metal construction can hold high weights; * Lightness (in case of aluminum); * Corrosion Stability; * Manufacturability; * Quick Installation; * Reliability of metal and constructions (determined by the relatively high uniformity of mechanical properties of steel).
Gas cutting is process that use fuel gases and oxygen to cut metals. Gas cutting is no worse than the quality and speed of plasma cutting. Allows to cut much thicker metal sheets. In gas cutting, a cutting torch is used to heat metal to kindling temperature. A stream of oxygen is then trained on the metal, and metal burns in that oxygen and then flows out of the cut as an oxide slag. Basic advantages of gas cutting: * High accuracy positioning; * High speed of cutting; * Low price; * Absolutely normal slice.