Resistance welding of refractory metals niobium and tantalum with the steel of grades AISI 201 and AISI 307 at imposing of external pressure
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Keywords:
resistance welding, refractory metals, electron microscopy, transition zoneAbstract
The identified conditions of welding foils of refractory metals Nb and Ta to steel grades AISI 201 and AISI 307 at imposing of external pressure. By means of scanning electron microscopy investigated the transition zone. It is shown that the resistance welding Nb and Ta with a steel plate, there are processes of simultaneous heating and melting of the contact. Create a lasting bond of materials for welding is performed by successive melting and wetting of the surface of the foils of Nb and Ta, thus ensuring a large contact surface and the homogeneity of the weld.
References
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2 B. A. Greenberg, M. A. Ivanov, V. V. Rybin, A. V. Inozemtsev. Structure, Phase Transfor-mations, and Diffusion Inhomogeneities of the interface produced by explosive welding. //The Physics of Metals and Metallography .- Volume 113, №2 (2012), - Р. 176-189.
3 К.А. Кочергин. Контактная сварка.// Л. «Машиностроение», - 1987 г., - С 242-245.
4 Шоршоров М.Х. Клинопрессовая сварка давлением разнородных металлов. //М., Метал-лургия.,- 1982г. – С 126-124.
5 L. I. Yajiang, W. Juan, Z. Bing and F. Tao Мicrostructure in the welding zone of 9Cr-1Mo-V-Nb heat-resisting steel. //Bulletin of Materials Science, Volume 25, - 2002, № 3, - P. 213-217.
6 Changqing Xia and Zhanpeng Jin. Interfacial reaction in the tantalum-steel explosion weld com-posite at 1053 K. //Journal of Central South University of Technology, Volume 4, - 1997, - №1. P. 5-8
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Published
2012-12-21
Issue
Section
Condensed Matter Physics and Materials Science Problems. NanoScience
