Products Description
A thin tungsten product composed of pure tungsten or tungsten alloy is called a tungsten needle. It can be utilized as an instrument probe and as an electrode material in argon arc welding technique. Its strong conductivity and great temperature resistance are its advantages. Under glow discharge circumstances, carbonyl tungsten vapor is used to make tungsten needles. On room temperature tungsten substrates, needle development takes place in the 1500°K range; however, when the temperature goes beyond or below ~1100°K, the needle morphology and crystallization state change. Tungsten particle products have the morphology of whiskers at higher temperatures and tree branches at lower temperatures.In scientific equipment, tungsten needles are ultra-sharp electrodes composed of a refractory alloy. The electrode is pointed at the base and blunt at the tip. It can be recycled to remove and replace the molten oxidizer tank rod. It is composed of a refractory alloy in an enlarged electrode cylinder perpendicular to the axis of rotation.
There are two main production processes for tungsten needles: one is the metal injection molding process, and the other is the wire drawing forming process.
The basic process of the metal injection molding process is to first knead the solid powder and organic binder evenly, granulate it, and then inject it into the mold cavity with an injection molding machine to solidify and form.
Then the binder in the preform is removed by chemical or thermal decomposition, and finally the final tungsten needle product is obtained by sintering and densification.
The wire drawing forming process is to heat the metal raw material until it becomes plastic, then stretch it to the desired diameter, and finally cool it through shearing.
Product Parameters
Tungsten needle-chemical composition：
|
Trademark |
Tungsten content |
Impurity element content |
|
|
total content(≤) |
Content of each element(≤) |
||
|
WAL1/WAL2 |
≥99.95% |
≤0.05% |
≤0.01% |
|
W1 |
≥99.95% |
≤0.05% |
≤0.01% |
|
W2 |
≥99.92% |
≤0.08% |
≤0.01% |
|
Note: Potassium is not included as an impurity content |
|||
Popular dimensionsTop：
|
Diameter (+-0.005)mm |
Length (0~+0.5) |
Tip angle (°) |
Tip length (mm) |
|
3 |
10~330 |
30,45,60,90 |
3,4,5 |
|
4 |
10~330 |
30,45,60,90 |
3,4,5 |
|
5 |
10~330 |
30,45,60,90 |
3,4,5 |
|
6 |
10~330 |
30,45,60,90 |
3,4,5 |
|
7 |
10~330 |
30,45,60,90 |
3,4,5 |
|
8 |
10~330 |
30,45,60,90 |
3,4,5 |
|
9 |
10~330 |
30,45,60,90 |
3,4,5 |
|
10 |
10~330 |
30,45,60,90 |
3,4,5 |
|
Note: Customized sizes are also available. |
|||
Note: It is acceptable to use custom sizes and forms
Product Categories
Tungsten needles can be divided into round rod-shaped tungsten needles and pointed tungsten needles according to their shapes:
round rod shape
The round rod-shaped tungsten needle has a slender structure and a metallic surface. Used for argon arc welding electrodes. Argon arc welding technology is the fastest growing and most widely used welding technology at home and abroad. In particular, manual tungsten arc welding has become an indispensable method for welding various metal structures.
During welding, an arc is generated between the tungsten electrode and the workpiece, and the filler metal is fed in from one side. Under the action of arc heat, the filler metal and the workpiece melt together to form a weld.
In order to prevent the melting and burning of the electrode, the welding current cannot be too large. Therefore, tungsten arc welding is usually suitable for welding thin plates below 4mm, such as pipe butt joints and connections between pipes and tube sheets.
with pointed tip
Tungsten needles with pointed tips are mainly used as instrument probes. Such as the digital four-probe tester, which is a multi-purpose comprehensive measurement equipment that uses the four-probe measurement principle.
This instrument is designed in accordance with the national standards for physical testing methods of single crystal silicon and with reference to the American A.S.T.M. standard. It is a dedicated instrument for testing the resistivity and sheet resistance (sheet resistance) of semiconductor materials.
It is suitable for testing the resistance properties of semiconductor materials in semiconductor material factories, semiconductor device factories, scientific research units, and universities.
Products Application
The primary applications for tungsten needles include operating single particles, cutting collodion particles, and engraving metal surfaces. These needles frequently bend or break due to their extreme brittleness. Particle cutting requires hand operation to be completed. These tungsten needles are used to blow glass and crystal embryos in addition to cutting particles.
It is also widely used in rare earth, vacuum furnace, glass fiber, industrial ceramics, petrochemical, aviation, aerospace, machinery, electronics, lighting, LED, silicon material production, solar photovoltaic, semiconductor, vacuum coating and other industries, especially mainly used for vacuum heating Chamber, thermal field aspects of sapphire crystal growth.
Packing Delivery
1. Use a non-destructive export wooden container for packaging.
2. Delivery via land (train), sea, and express air freight based on the weight of the package and the needs of the customer.
3. We can supply to any Chinese ports for maritime transportation.
FAQ
FAQ
Q: Where is your factory?
Q: How long is the production time?
Q: How to get a quotation?
Q: Can I ask for anything to be engraved on it? Will there be a fee?
Q: What is the minimum order quantity?
Contact US
Tel :
+86 18700703333 Elsa lin
FAX : 0917-3381186
Email :
Add: No. 28, Gaoya Industrial Park, Gaoxin District, Baoji City, Shaanxi Province
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