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Specifications
2014 polished hot sale pure tungsten barHigh Purity :tungsten 99.95%
Dia. :3~100mm Length :50-1500mm
Application:Industry
1.Physical and chemical properties
1 Forging tungsten rod
1.1 Purity: W≥99.95%;
1.2 Density:≥19.3g/cm3;
1.3 Linearity:≤1%;
2 Sintering tungsten rod
2.1 Purity:W≥99.95%;
2.2 Density:≥18.3g/cm3;
2.3 Linearity:≤3%
2.Measurements and tolerances
Unit:mm
Delivery condition | Diameter | Diameter tolerance(%) | Max length |
Forging or sintering | <20 | ±0.1 | 2000 |
20~30 | ±0.1 | 1200 | |
30~60 | ±0.1 | 1000 | |
60~70 | ±0.2 | 800 | |
70~90 | ±0.2 | 600 | |
>90 | Manufacture according to customers’ requirements | ||
3. Manufacture process and Equipment
Sintering tungsten rod | |||
Item | Process | Equipment | Quality check point |
1 | Tungsten powder |
|
|
2 | Sieving | High frequency vibrating sieve | 1 Purity of tungsten powder |
3 | Mixed powder | V shape mixer | 2 Mixed tungsten powder |
4 | Check |
|
|
5 | Isostatic pressing | Isostatic pressing machine | 1 Measurements, unit net weight |
6 | Check |
| 2 Surface quality |
7 | IF sintering | IF induction sintering furnace | 1 Measurement, unit net weight, density |
8 | Alignment | 200T pressing machine | 2 Linearity ,Surface quality |
9 | Check |
| 3 Quality standard:ASTM |
10 | Package |
| 4 Show certificate of quality |
Forging tungsten rod | |||
Item | Process | Equipment | Quality check point |
1 | Sintering tungsten rod |
| 1 Measurements |
2 | Forge | Forging air-hammer | 2 Density |
3 | Machining | Lathe, grinder | 3 Linearity ,Surface quality |
4 | Check |
| 4 Quality standard:ASTM |
5 | Package |
| 5 Show certificate of quality |
4.Application
Sintering Tungsten rod, as the material, is mainly used in pulling Tungsten wire and Forging Tungsten Rod. As Tungsten possesses the feature of dyslectic point, forging Tungsten rod with high-purity, high-density and excellent high-temperature proof of creep deformation is widely applied for tungsten crucible's supports in the sapphire growth furnace, electrodes, heating elements, connections and support rods in high-temperature furnace.
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