Tungsten ore in surface welding

• Published in: Steel in translation Vol. 45; no. 8; pp. 546 - 549
• Main Authors: Kozyrev, N. A., Shurupov, V. M., Kushnarenko, N. N., Kozyreva, O. E., Titov, D. A.
• Format: Journal Article
• Language: English
• Published: New York Allerton Press 01.08.2015; Springer Nature B.V
• Subjects: Aluminum base alloys; Carbon; Chemistry and Materials Science; Materials Science; Reduction; Tungsten; Wastes; Wear tests; Welding; Wire; carbon-bearing waste; metallographic study; tungsten oxide; wear; surface welding; reduction; chemical composition; metallurgical waste; powder wire
• DOI: 10.3103/S0967091215080070
• ISSN: 0967-0912

The use of tungsten powder wire produced from metallurgical waste in surface welding under AN 26S flux is studied experimentally; specifically, the powder wire is produced on the basis of the tungstenbearing components (including tungsten ore and concentrates) in dusty wastes from aluminum production that contain carbon and fluorine. The research includes the manufacture of powder wire with different proportions of the tungsten-bearing and carbon-bearing components; selection of the welding conditions; determination of the chemical composition of the weld metal and the slag after welding; metallographic study; and wear tests. The reduction of tungsten directly from tungsten-bearing oxides using carbon-bearing reducing agents is shown to be possible in principle; the degree of tungsten reduction is more than 96%. In this technology, tungsten carbides of size 1–5 µm are present in the welded layer.