In areas where perfect welds of the best quality are required, tungsten inert gas welding or TIG is the first choice.Learn more
Many who come into contact with welding technology for the first time start with electrode welding, a versatile and flexible process that uses an electric arc.Learn more
This is how arc welding technology works
Arc welding is one of the fusion welding processes. In this process, an electric arc generated by means of electrodes produces a very intense heat of 3500° C to melt metal at the planned joints between two workpieces. The actual metallurgical joint is formed by the solidification of the molten metal when everything cools down again. Arc welders are powered by a DC or AC source, depending on the process used. Whether the electrodes melt and can be used as an additional material or are designed to be wear-resistant also depends on the welding process used.
MIG - MAG welding
In so-called metal inert gas welding, a distinction is made between two processes, namely metal inert gas welding and metal active gas welding. Therefore, the abbreviation MIG - MAG is derived for this welding technique. MIG - MAG welding is characterized by a high working speed and very low distortion of the materials to be processed, which greatly reduces the need for subsequent rework. Therefore, MIG - MAG welding is considered to be very economical. With this welding technology, thin sheets can also be welded excellently, and the excellent weld seam strength should also be emphasized. MIG - MAG welding equipment can be used to process steel, aluminum and stainless steel. Since the process can be used almost universally, it is considered the most frequently used welding process in industry and trade.
In the so-called TIG welding process, the electric current is supplied via a tungsten electrode. It generates an arc that heats and ultimately liquefies the material to be welded. A shielding gas, which flows from the gas nozzle into the work area, protects the material and the molten pool from unfavorable chemical reactions that could occur on contact with the ambient air. Welds made using the TIG process are considered to be of particularly high quality and stability.
Electrode welding has proven itself for mobile and fast use under adverse conditions. This welding process does not require the use of shielding gas, which is why it can be used outdoors and in adverse weather conditions. Thanks to the use of powerful lithium-ion batteries, mobile electrode welders can also be used without access to mains power. Since almost all weldable materials can be joined using this process, inverter welders in particular are suitable for almost every area of application.
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How do you find the optimum welding process for your material?
|TIG welding||All metals|
|MAG welding||All steels|
|MIG welding||Alloyed steels, nonferrous metals|
|Laser welding||All steels, light metals, glass|
|Electrode welding||All steels|
|Resistance welding||All metals|
|Stud welding (tip ignition)||Carbon steel, stainless steel, brass|
|Stud welding (drawn arc)||Unalloyed steel, stainless steel|
Questions & Answers
What exactly is meant by arc welding?
Arc welding is one of the electrical welding processes that is powered by a DC or AC source. The arc thus generated provides a very high heat that melts metals at the joint to create a permanent bond.
In which areas is arc welding used?
This welding process can almost always be used for steel and stainless steel. In addition, various non-ferrous metals can also be welded with it. Due to the slow process, manual arc welding is a relatively unproductive process. However, its simplicity and versatility make it extremely suitable for flexible use on construction sites or in workshops.
What equipment is needed for manual arc welding?
The required equipment includes a power source suitable for welding, appropriate cables, electrode clamp and stick electrodes. In addition, there is the protective equipment for the user. Effective eye protection is essential because of the UV radiation of the arc. Depending on the conditions of use, further special clothing may be required to protect the user from metal splashes, heat and smoke development.
How is the arc generated?
Either trigger ignition or contact ignition is required to generate the arc. For trigger ignition, a sufficient voltage pulse between the workpieces is required. Contact ignition can be generated by tapping a workpiece with the welding electrode.
What power source is needed for arc welding?
A so-called welding power source is required to generate the high currents used in arc welding. The technically simplest power source for this is a welding transformer that supplies alternating current. Such devices are often referred to as stray field transformers and are characterized by their good short-circuit resistance.
What temperatures are generated during arc welding?
The temperature during arc welding can reach very high values. Depending on the welding technology used, temperatures between around 3,700° C and 13,700° C can occur, corresponding to values of 4,000 to 14,000 Kelvin.
What is DIN EN 1090?
In connection with welding work, there is always talk of DIN EN 1090. This is a European standard that regulates the requirements for manufacturer certification, proof of conformity, CE marking and factory production control for load-bearing steel and aluminum components that are to be placed on the market as construction products. Lasaco will be pleased to advise and support you in complying with DIN EN 1090.