| Popis: |
High-purity titanium alloys are used to produce the most critical elements of aircraft structures. Refractory metals such as titanium, tungsten, molybdenum, niobium, zirconium are smelted in electron-beam furnaces. The melting point of these metals is much higher than the melting point of copper, this is the material, from which made melting tool. Therefore, a necessary condition for the smelting process is the forced cooling of the tool. Melting watercooled tool is an essential structural component of vacuum-arc, plasma-arc and electron-beam furnaces, which are used to produce high-purity metals with high melting points. A characteristic feature of the design of the melting tool is limited resource. The paper is devoted to the calculation of the stress-strain state and the resource of a melting instrument under thermomechanical loading. |
