Company profile
Shaanxi Changlong Jiuzhou Metal Technology Co., Ltd. is located in Baoji City, known as "titanium Valley" in China. Committed to rare metals, refractory metal research and development, production, sales. Products provided in strict accordance with national/international standards, professional technology, stable delivery, efficient service for the purpose.
The company's products are tungsten, molybdenum plate, sheet, circle, ring, rod, rod, wire, tube, boat, crucible, electrode, shaped products. With high melting point, high strength and good electrical and thermal conductivity, small expansion coefficient, good resistance to electrical corrosion. It is widely used in aviation industry, electronics industry, electric light source machinery industry and so on. The products sell well in more than 20 provinces and cities nationwide, and are sold to Japan, Southeast Asia, Germany, France, Taiwan and other more than a dozen countries and regions. Welcome domestic and foreign businessmen to the company to negotiate, let us work together to create a brilliant tomorrow of refractory metal industry.
The company is a high-tech enterprise, passed the ISO9001:2000 quality system certification, has advanced production equipment, strong technical force, perfect quality assurance system, advanced testing means.
Product display
Specializing in the production and processing of tungsten, molybdenum and other refractory metal materials and products
The tungsten nickel copper alloy produced by our company conforms to ASTM-B 777 standard.
Tungsten and molybdenum materials have:
1, high melting point; 2, low saturated vapor pressure; 3. Stable chemical properties
Therefore, it is the preferred material of evaporation source in vacuum coating, and tungsten molybdenum forging crucible is an important part of evaporation source.
Small crucibles made of tungsten and molybdenum are also often used in sintering furnaces of small ceramics and other materials
The forging crucible is formed by turning tungsten and molybdenum rods after forging or hot isostatic pressing. It has the characteristics of small volume and high density, and the wall thickness is usually 3 to 10 mm. Under 80 mm in diameter.
Purity of this crucible: W≥99.95%; Depending on the diameter, the density of tungsten crucible can usually reach 18.5 to 19g/cm3, and the density of molybdenum crucible is about 10.0g/cm3.
| Product | Diameter(mm) | Diameter tolerance(mm) | Height(mm) | Height tolerance(mm) | Roughness(μm) |
|---|---|---|---|---|---|
| Crucible | 10～500 | ±0.05～±0.5 | 10～500 | ±0.2～±0.5 | Ra≤0.8 |
| Tray | 10～500 | ±0.05～±0.1 | 10～500 | ±0.2～±0.5 | Ra≤1.6 |
| Base | 10～500 | ±0.05～±0.1 | 10～500 | ±0.2～±0.5 | Ra≤1.6 |
| Supporting Rod | 10～100 | ±0.05～±0.1 | 10～100 | ±0.2～±0.5 | Ra≤1.6 |
| Heating | Customized | – | Customized | – | – |
| Shield | Customized | – | Customized | – | – |
| Rod Product | Customized | – | Customized | – | – |
Core performance of our tungsten crucibles:
High-temperature resistance
Melting point: 3410℃, can work stably in vacuum or inert gas at temperatures below 2600℃.
Good high-temperature strength, resistant to creep deformation, suitable for extreme environments above 2000℃.
Physical and chemical stability
Low thermal expansion coefficient (resistant to thermal shock), high thermal conductivity (uniform heating);
Strong corrosion resistance, does not react with molten rare earths, silicon and other active substances.
Mechanical properties
High hardness (Mohs hardness 7.5), excellent wear resistance, long service life.
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