Filament Cleaned High Quality Tungsten Wire Hot selling

Description:

Including high temperature performance, room temperature performance and wire diameter consistency.
High temperature performance. The working temperature of tungsten filaments for incandescent lamps is usually between 2300 and 2800℃. Generally, the greater the power of the bulb, the higher the working temperature of the filament. It can be seen that the working temperature of the filament far exceeds the recrystallization temperature of the tungsten filament. At this time, the filament will sag under the action of its own weight in the wire section between the two hooks. In severe cases, the filament may sag to the glass shell of the bulb. For doped tungsten filaments that are doped with a small amount of potassium, silicon and aluminum oxides during the powder metallurgy process of tungsten, although the silicon and aluminum content in the final finished wire is only a few parts per million, and the potassium content is only a few tens of parts per million, the sag degree of the filament made of this doped tungsten filament can be greatly improved. The reason is that the crystal structure of recrystallization of doped tungsten filaments and undoped tungsten filaments is very different. The recrystallized crystals of undoped tungsten filaments are basically equiaxed crystals, while the recrystallized crystal structure of doped tungsten filaments is coarse grains that overlap each other in the form of long strips. From the high temperature creep theory of metal materials, this recrystallized crystal structure with a thick and long overlap structure can greatly improve its ability to resist sagging at high temperatures. According to a series of transmission electron microscope and Auger spectrometer research and analysis conducted in the 1970s, the formation of the recrystallized crystal structure with a thick and long overlap structure unique to the doped tungsten wire is closely related to the potassium contained in the doped tungsten wire. The trace potassium remaining in the doped tungsten bar forms potassium bubble columns parallel to the wire axis during processing, which hinders the lateral growth of the grains during the recrystallization process, thereby generating a thick and long overlap structure.

Specifications:

Packing & Delivery:

To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.

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FAQ:

Q: What information should I let you know if i want to get a quotation?

A: The required material dimension (Thickness*Width*Length,diameter*length; if possible, please kindly supply us drawings).
The required more information, such as Surface Condition, Tolerance Request, The Quantity, and other mechanical and technical details.

If it is possible, please also provide the application of products, we will recommend the most suitable products with details for confirmation.

Q: How do you gurantee the quality of the products?

A: Each step of production and finished products will be carried out inspection by QC department before storing in the warehouse. NG goods are not allowed in the completed goods warehouse.

Q: Can you guarantee the prompt delivery?

A: Yes, when we get your inquiries, not only we will evaluate the more competitive price, but also we can get the most reasonable delivery time. So the prompt delivery can be guaranteed.

Q: What is the shipping cost?

A: The shipping cost is determined by the destination port, weight, packing size, total CBM of the products, we will try best to get the most reasonable shipping cost from the forwarders or express couriers to help you save more money.

Q:What is the transportation way?
A:If the Gross Weight ≤45kg, it's better by express such as TNT, DHL, FedEx,, etc.
If the Gross Weight between 45kg to 100kg, by express or by air to your nearest airport can be both considered.
If the Gross Weight ≥ 100kg ,you can choose by Air or Sea to the nearest port.