Affiliation:
1. Ganzhou Nonferrous Metallurgy Research Institute
Abstract
The 0.6 mm tantalum sheet was welded under argon atmosphere by Tungsten Inert Gas Welding (TIG) in order to obtain a welded joint with high-quality and high-reliability. Metalloscope, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were applied to analyze the joint. The results showed that the grain size of the base metal which affected by the welding heat remained the original size or enlarged slightly to 40-70 μm. What’s more, the weld zone was found to be composed of two components with different oxidation degree. And the distribution of these two components was related to the protection atmosphere of the location. The fusion line of the two tantalum sheets was clear which means high welding quality.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference21 articles.
1. Rowe C E D. The use of tantalum in the process industry[J]. Journal of Minerals, Metals and Materials Society, 1997, 49(1): 26-28.
2. Miller A E, Daane A H, Habermann C E, et al. Welding Tantalum for High Temperature Applications[J]. Review of Scientific Instruments, 1963, 34(6): 644-647.
3. Hunkeler F J. Properties of tantalum for applications in the chemical process industry[M]//Refractory Metals and Their Industrial Applications. ASTM International, (1984).
4. Daane A H. Welding Tantalum[J]. Review of Scientific Instruments, 1952, 23(5): 245-246.
5. Grill A. Effect of current pulses on the temperature distribution and microstructure in TIG tantalum welds[J]. Metallurgical Transactions B, 1981, 12(1): 187-192.