Plasma properties of helium gas tungsten arc with metal vapour

Autor:	Manabu Tanaka, Kazuhiro Nakata, Shinichi Tashiro, T. Iwao, Keiichi Suzuki, K. Yamazaki, Fusaki Koshiishi
Rok vydání:	2007
Předmět:	Electric arc Plasma arc welding Heat-affected zone Materials science Gas tungsten arc welding Shielding gas Metallurgy Analytical chemistry General Materials Science Condensed Matter Physics Energy source Submerged arc welding Gas metal arc welding
Zdroj:	Science and Technology of Welding and Joining. 12:202-207
ISSN:	1743-2936 1362-1718
Popis:	The energy source characteristics of gas tungsten arc (GTA) strongly depend on the physical property of arc plasma. In welding processes, it has been experimentally confirmed that metal vapour evaporated from a high temperature weld pool drastically changes the property of arc plasma and decreases its temperature. However, the effect of metal vapour on the characteristics of heat flux into a base metal is still not clear owing to the difficulty in experimental studies of arc plasma. In the present paper, the energy source property of helium GTA mixed with metal vapour was numerically analysed. It was found that the intense radiation generated from dense metal vapour decreases heat flux into a base metal and contracts the current density distribution especially near the arc axis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a6e0c9a1cc4ebaa698f57b4a7ff44bcc https://doi.org/10.1179/174329307x164391 Zobrazit plný text záznamu Plný text ve formátu PDF