PROBLEMS ARISING FROM THE THEORY OF HEAT-RESISTANCE ALLOYS,

The article considers the solubility and dispersion mechanisms for strengthening refractory metals. The main aim of the article is a consideration of the possibility of creating new heat resistant alloys based on the refractory metals, in particular the big four, columbium, tantalum, molybdenum, and tungsten. A table presents calculated critical temperatures for the above metals. On the basis of the experimental data presented, the following factors must be considered in the application of solution and dispersion effects in the strengthening of alloys 1 Use should be made of the great tendency of the transition metals, including the big four, toward the formation of a wide range of solid solutions. For alloys of this kind, the basic systems are tungsten-tantalum-molybdenum-columbium and tungsten-molybdenum-columbium-vanadium. 2 Using the ability of these metals to combine with light metals and metalloids aluminum, beryllium, boron, carbon, silicon, nitrogen to form limited solid solutions and high melting compounds aluminides, beryllides, borides, carbides, silicides, nitrides, these metals should be used for alloying multicomponent alloys.