Carbon arc welding

This article will address the topic of Carbon arc welding, which has gained great relevance in recent times due to its impact on various areas of daily life. Since its emergence, Carbon arc welding has aroused great interest among experts and the general public, generating debates, research and creating new opportunities in different sectors. Throughout this writing, different aspects related to Carbon arc welding will be analyzed, exploring its origins, evolution and its influence on current society. In addition, different perspectives and approaches will be examined to further understand the importance and scope of Carbon arc welding today.

Carbon arc welding (CAW) is an arc welding process which produces coalescence of metals by heating them with an arc between a non-consumable carbon (graphite) electrode and the work-piece. It was the first arc-welding process developed but is not used for many applications today, having been replaced by twin-carbon-arc welding and other variations. The purpose of arc welding is to form a bond between separate metal pieces. In carbon-arc welding a carbon electrode is used to produce an electric arc between the electrode and the materials being bonded. This arc produces temperatures in excess of 3,000 °C. At this temperature the separate metals form a bond and become welded together.

Development

Main article: Arc welding § History
The patent for the arc welding method named Elektrogefest ("Electric Hephaestus") granted to Nicholas de Bernardos and Stanisław Olszewski in 1887

CAW could not have been created if not for the discovery of the electric arc by Humphry Davy in 1800, later repeated independently by a Russian physicist Vasily Vladimirovich Petrov in 1802. Petrov studied the electric arc and proposed its possible uses, including welding.

The inventors of carbon-arc welding were Nikolay Benardos and Stanisław Olszewski, who developed this method in 1881 and patented it later under the name Elektrogefest ("Electric Hephaestus").[1][2]

Variations

  • Twin carbon arc welding (TCAW) in which the arc is established between two carbon electrodes
  • Gas carbon arc welding (CAW-G) no longer has commercial significance. Other processes that use shielding gases have also replaced carbon-arc welding such as tungsten-arc welding (GTAW, or TIG), plasma-arc welding (PAW), and atomic-hydrogen welding (AHAW). Each of these processes, including carbon-arc welding, use a nonconsumable electrode.[citation needed] A filler metal is generally used to aid the bond in the workpieces.

References

  • Welding handbook Volume 2, eighth edition. Library of Congress number: 90-085465 copyright 1991 by American Welding Society
  1. ^ Nikołaj Benardos, Stanisław Olszewski, "Process of and apparatus for working metals by the direct application of the electric current" patent nr 363 320, Washington, United States Patent Office, 17 May 1887.
  2. ^ "80 lat Przeglądu Spawalnictwa" [80 Years of the Welding Review]. Przegląd Spawalnictwa (in Polish) (10). Warszawa: 3–9. 2008. ISSN 0033-2364.

See also

Wikious
Boobota
Sagapedia