Tungsten and molybdenum alloys
Technical characteristics
The melting point of tungsten is equal to 3380 °C, boiling point is 5900 °C, the evaporation rate is minimal even at a temperature of 2000 °C. under normal conditions it does not react with chemical reagents. Combines high hardness and brittleness, high electrical resistance. As part of the technical tungsten is present 0.03% molybdenum.
Percentage composition GOST 19671−91
| W | Mo | Ca | Fe | Si | Al |
|---|---|---|---|---|---|
| 99.95 | ≤0.03 | ≤0.005 | ≤0.005 | 0.001 — 0.006 | 0.001 — 0.004 |
Molybdenum
In refractoriness, it is left behind only tungsten and rhenium, and Molybdenum are characterized by low expansion coefficient and good electrical conductivity (better than iron). Under normal conditions the metal does not react with chemicals. For strength it is slightly inferior to tungsten, but is much easier to handle.
Physical properties of molybdenum (20°C)
| Feature | The value |
|---|---|
| The Mo density [g/cm3] | 10,22 |
| Melting point | 2620 °C (2890°K) |
| Boiling point | 4639 °C |
| Thermal conductivity [W/(m·K)] | 138 |
| Oxidation | 6, 5, 4, 3, 2 |
| The specific heat of fusion | 28 kJ/mol |
Production
Technological plasticity of tungsten is minimal, so the semi-finished products are produced by powder metallurgy. To obtain a molybdenum alloy with tungsten mixed powders of these metals. The composite material has a complex microstructure. It consists of a mixture of tiny metal particles which form the matrix combines the properties of metals entering into its composition, Semi-finished products made of this material is produced by compression of microparticles of tungsten and molybdenum in a desired shape, sintering the compacted mass in the so-called Fort. After further heating the rod billet, compacted and Raskulinecz to the required parameters.
Application
Electrical engineering, power engineering, and the aerospace industry, metallurgy. The cathodes of vacuum devices, parts of rocket engines. Wire thread used in the manufacture of electronic devices and light sources.
Supplier
Supplier Evek GmbH offers to buy tungsten-molybdenum alloys, the price is optimal in this segment of the rental. Full compliance with the international quality standards. Supplier Evek GmbH offers to buy tungsten and molybdenum alloys with specialized warehouses Evek GmbH with delivery to any city.
To buy, best price
Offer to buy tungsten-molybdenum alloys, price is determined by the technological features of production without the inclusion of additional costs. You can order products in non-standard settings. We have the best ratio price — quality molybdenum alloys. The company Evek GmbH — best supplier. Timely delivery is provided by offices in the cities of Eastern Europe.
