The measurement of metal droplet temperature in GMA welding by infrared two-colour pyrometry

Autor:	Kazuhiro Nakata, Fusaki Koshiishi, Shinichi Tashiro, Eri Yamamoto, Kei Yamazaki, Kenji Waki, Manabu Tanaka, Keiichi Suzuki
Rok vydání:	2010
Předmět:	Heat-affected zone Materials science Infrared Mechanical Engineering Metallurgy Metals and Alloys Welding law.invention Gas metal arc welding Calorimeter Physics::Fluid Dynamics Wavelength Mechanics of Materials law Physics::Atomic and Molecular Clusters Arc welding Composite material Pyrometer
Zdroj:	Welding International. 24:81-87
ISSN:	1754-2138 0950-7116
Popis:	The temperature of metal droplets is essential for clarifying the phenomenon of metal droplet transfer and the melting behaviour of wire; also, it governs the emission of fumes. On the other hand, in situ measurement of the temperature of a metal droplet formed at the tip of a wire during welding was difficult. Hence, this temperature was obtained in many experiences of measurements by such a way that several numbers of metal droplets were collected in a calorimeter to measure the amount of heat content of metal droplet and the heat was converted to temperature. With this way, however, the reliability of the measurement is not necessarily high because the heat loss of the metal droplet during the time when detaching from the wire tip and entering into the calorimeter has to be estimated properly. In this research, two-colour pyrometry has been conducted to obtain the temperature of metal droplets, in which metal droplets have been photographed by a high-speed camera during arc welding, two wavelengths (95...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::32f80ad084d99a2b7c508ee55a1a9c15 https://doi.org/10.1080/09507110902842950 Zobrazit plný text záznamu