| Abstract: | Conclusions A number of refractory alloys based on niobium were developed, and their properties were investigated; the complex of these properties permits the recommendation of these alloys for use in various fields of technology. The alloys are characterized by good technological properties, ensuring the production of various objects: sheets, bars, tubes, and wires, under industrial conditions. The most heat-resistant alloys of the RN brand, possessing substantial short-term and long-term strength, are the alloys of tungsten, molybdenum, and zirconium (RN-6, RN-5). The alloys can be subjected to dispersion hardening.It was found that the alloy RN-6, produced by the method of centrifugal casting, possesses better mechanical properties than the alloys produced by arc and electron beam methods, as a result of its fine-grained structure. The alloying of niobium alloys with titanium, instead of zirconium, causes a smaller increase in the strength, especially at increased temperatures; however, their plasticity increases somewhat. Alloys of the RN type possess high corrosion resistance in lithium at 1000°C, as well as in solutions of hydrochloric and sulfuric acids.Translated from Atomnaya Énergiya, Vol. 23, No. 1, pp. 32–37, July, 1967. |
