Tungsten Contact Disc

  • 25-07-30
  • JINXING METAL
  • Tungsten

Overview

The Tungsten Contact Disc is a circular component made from tungsten (or a tungsten-based alloy) through powder metallurgy, pressing, sintering, and precision machining. It can be used in applications such as electrical contacts, high-temperature furnace components, instrumentation gaskets, and medical X-ray equipment. It is a critical component for ensuring stable operation of equipment in high-current and high-X-ray transmission environments.

Advantages

  • Its high melting point allows it to maintain a stable shape and properties even in extremely high-temperature environments, resisting melting or deformation.
  • It's high hardness and strong wear resistance reduce wear during mechanical operation and extend the life of equipment.
  • In high-temperature environments, its electrical and thermal conductivity is even more stable, ensuring stable current transmission and efficient heat dissipation.
  • At room temperature, tungsten is unreactive with air, water, and most acids, alkalis, and other chemicals, exhibiting excellent corrosion resistance.

Application

1. Electronics and Semiconductor Industry

  • Chip Manufacturing and Packaging: In processes such as ion implantation and sputtering coating of semiconductor chips, Tungsten Contact Discs can be used as electrodes or targets, leveraging their stable conductivity and high-temperature resistance to ensure process precision and stability.

  • Electron Tubes and Vacuum Devices: They can serve as cathodes, gates, and other components within electron tubes, enabling continuous operation in high vacuum and high-temperature environments, maintaining the tube's normal emission and control functions.

  • Sensors and Detectors: They can serve as substrates or protective layers for sensitive elements in some high-precision sensors (such as temperature sensors and radiation detectors), leveraging their chemical stability to reduce environmental interference.

2. High and Low Voltage Electrical Appliances

  • Circuit Breakers and Contactors: In high-voltage circuit breakers, AC contactors, and other devices, Tungsten Contact Discs serve as core switching components. They withstand high-temperature arcing generated during switching, reduce contact erosion, and ensure stable circuit opening and closing.

  • Relays and Switches: As a contact material in precision relays (such as automotive and aviation relays) and high-voltage switches, they extend the life of the equipment, making them particularly suitable for applications subject to frequent operation.

3. Machinery Manufacturing and Mold Industry

  • Wear-resistant components: They are used as wear-resistant gaskets and bearing ball bearings in precision machinery, reducing mechanical wear and extending equipment life. For example, they are used in the transmission mechanisms of high-speed machine tools and precision instruments.

  • Mold inserts: Small discs are embedded in high-wear areas of stamping and die-casting molds as a wear-resistant layer, improving the mold's impact and wear resistance. They are particularly suitable for molds used in processing high-strength metal materials.

4. Medical Field

  • Radiotherapy Equipment: In linear accelerators used for tumor radiotherapy, Tungsten Discs can be used as components of radiation collimators. Their high density allows for precise control of the shape and range of the radiation beam, minimizing radiation exposure to normal tissue.

  • Implantable Medical Devices: They can be used as a base for wear-resistant coatings in some artificial joints and orthopedic implants. Their chemical stability can reduce rejection by human tissue and improve component wear resistance.

5. Aerospace and Defense

  • Aviation electrical components: These are primarily used for contacts in aircraft engine control systems, landing gear hydraulic switches, navigation equipment power supplies, and other components. They operate reliably in high-altitude, low-pressure environments and extreme temperature fluctuations, ensuring flight safety.

Dimension

Grade

W1/W2

Purity

≥99.95%

Diameter

3-50mm

Thickness

0.3-5mm

Melting Point

3410℃

Density

19.2g/cm3

Surface

Alkaline cleaning

Delivery Time

20 days

Standard

ASTM B760, GB

Certification

ISO9001

Process

① Ultrafine tungsten powder with a purity of ≥99.95% is used, and impurity content must be strictly controlled to ensure the final product's electrical conductivity and high-temperature resistance.

② High-precision molds are customized according to the wafer size, and cold isostatic pressing is used to form the wafer.

③ After high-temperature sintering, the density can reach over 95% of the theoretical density, facilitating subsequent processing.

④ Rough machining is used to refine the blank to near-final dimensions, followed by finishing with grinding to control dimensional tolerances and meet high-precision requirements.

⑤ Surface cleaning or coating ensures surface cleanliness and extends service life.

⑥ Comprehensive quality inspections, including visual inspection, performance testing, and appearance testing.

Pictures

Tungsten Contact Disc Tungsten Disc