Machining, rolling and deforming tungsten
Recrystallization
Recrystallization of deformed tungsten proceeds in the temperature range of 1450 - 1600 C. During hot pressing, glass lubricant is used to reduce contact friction between the ingot and the tool and to maintain the temperature of the ingot.
Pressing
Tungsten is preheated to high temperatures, and pressing is done quickly to reduce deformation resistance and maintain ductility. The first hot deformation is usually performed from a billet diameter of 65 mm to 45 mm (t° 1800- 1900° C) on a press with a force of 12 MN (1200 T). The second pressing to a diameter of 20-25 mm is (t° 1350-1500°C).
Processing optimization
To reduce the press force tungsten billet is heated to higher temperatures, but the structure of the metal is obtained coarse-grained, which significantly worsens further processing. Processing at low temperatures provides a fine-grained structure of the metal, but also requires more effort.
Grade BM GOST 19671-91
| W | Impurities | - |
| min 99.7 | ≤ 0.05 | 0.17= |
Grade BA GOST 19671-91
| Fe | Si | Mo | W | Al | Ca |
| ≤ 0.005 | 0.001 - 0.006 | ≤ 0.03 | min 99.95 | 0.001 - 0.004 | ≤ 0.005 |
Furnizor
We offer to buy rare and refractory metals from specialized warehouses of the supplier Evek GmbH with delivery in any city. Full compliance with modern quality requirements. Supplier Evek GmbH offers to buy tungsten and tungsten alloys, the price is optimal in this segment of metal products. Timely delivery is provided by representative offices in Eastern European cities.
Buy, bargain price
We offer tungsten and tungsten alloys, price - determined by the technological features of production without the inclusion of additional costs. On the site of the company displays information about the latest arrivals of products. In the segment of rare and refractory metals, Evek GmbH is a profitable supplier.
