Tungsten Wire Specification
As for the manufacturing method of refractory metal powder, in particular to the manufacturing method of the tungsten powder to produce the tungsten filament bulb, its process is:
1. Preparation of mixed solution: ammonium tungstate, potassium silicate, aluminum nitrate, potassium hydroxide and hydrochloric acid solution.
2. Mix the solution according to the ratio.
3. Dry the mixture solution with spray.
4. The spray dried powder is reduced by hydrogen to form the doped tungsten powder.
5. Pressure type
6. Vertical melting
7. Rotary forging
8. Produce tungsten filament lamp by drawing. The thin filament is made of tungsten rod by forging and drawing, which is mainly used in incandescent lamp, halogen tungsten lamp and other electric light source. The tungsten wire used in bulb as light-emitting body, also need to be mixed with a small amount of potassium, silicon and aluminum oxide in the smelting process, which is called doped tungsten wire, also known as the 218 tungsten wire or non-sag tungsten wire. Now the tungsten wire is generally drawn by a variety of wire drawing die. The drawing die is divided into hard alloy drawing die, precision ceramic drawing die, etc. The wire drawing machine is composed of a thick drawing machine, a fine drawing machine and a very fine drawing machine.
Tungsten has the advantages of high melting point, high resistivity, good strength and low vapor pressure. It is the best material for the production of incandescent filament in all pure metals. However, the hardness of tungsten is big and brittle, which is difficult to process. In 1909, Coolidge invented the processing technology of tungsten filament, which played a decisive role in the production and promotion of incandescent bulbs, its basic principle has been used today. The resistance of tungsten wire is related to temperature. The higher the temperature is, the greater the resistance of tungsten wire is.
1. Preparation of mixed solution: ammonium tungstate, potassium silicate, aluminum nitrate, potassium hydroxide and hydrochloric acid solution.
2. Mix the solution according to the ratio.
3. Dry the mixture solution with spray.
4. The spray dried powder is reduced by hydrogen to form the doped tungsten powder.
5. Pressure type
6. Vertical melting
7. Rotary forging
8. Produce tungsten filament lamp by drawing. The thin filament is made of tungsten rod by forging and drawing, which is mainly used in incandescent lamp, halogen tungsten lamp and other electric light source. The tungsten wire used in bulb as light-emitting body, also need to be mixed with a small amount of potassium, silicon and aluminum oxide in the smelting process, which is called doped tungsten wire, also known as the 218 tungsten wire or non-sag tungsten wire. Now the tungsten wire is generally drawn by a variety of wire drawing die. The drawing die is divided into hard alloy drawing die, precision ceramic drawing die, etc. The wire drawing machine is composed of a thick drawing machine, a fine drawing machine and a very fine drawing machine.
Tungsten has the advantages of high melting point, high resistivity, good strength and low vapor pressure. It is the best material for the production of incandescent filament in all pure metals. However, the hardness of tungsten is big and brittle, which is difficult to process. In 1909, Coolidge invented the processing technology of tungsten filament, which played a decisive role in the production and promotion of incandescent bulbs, its basic principle has been used today. The resistance of tungsten wire is related to temperature. The higher the temperature is, the greater the resistance of tungsten wire is.
