Tungsten rivets are a special type of rivet, usually made of two materials, and are mainly used in high-strength and high-temperature resistant applications. Common tungsten bimetal rivets include tungsten-iron composite rivets and tungsten-copper composite rivets.

1. Structure of tungsten bimetal rivets

(1) Tungsten sheet: As the head or top material of the rivet, it has high hardness, high melting point and wear resistance.

(2) Base material: Usually copper or iron, providing good conductivity and toughness.

The tungsten sheet is fixed to the base (copper or iron) by welding. For tungsten-iron rivets, copper sheet is usually required as an intermediate layer to improve the welding effect and bonding strength.

2. Types of tungsten bimetal rivets

(1) Tungsten-iron composite rivet: The tungsten sheet is combined with the iron base by welding or other means. The iron base enhances the mechanical strength of the overall structure. The hardness of the tungsten sheet makes it excellent in friction and wear environments. The high melting point of tungsten makes it suitable for high temperature environments.

• Tungsten-coppercomposite rivets: The tungsten sheet is combined with the copper base. Tungsten is used as the head or top material, providing high hardness, high melting point and wear resistance. The copper base provides excellent electrical and thermal conductivity. The high electrical and thermal conductivity of copper makes it suitable for electrical and thermal management fields. However, copper has low strength and may not be suitable for high mechanical load scenarios.

3. Classification of tungsten sheets

(1) Cutting sheets: Made from a whole piece of tungsten material through mechanical processing (such as cutting and grinding). It has high dimensional accuracy and surface finish. It is suitable for high-performance, high-precision, and small-batch applications, such as aerospace, military, medical, and scientific research.

(2) Powder sheets: Made by pressing tungsten powder into a shape and then sintering it through a powder metallurgy process. It has low cost, but may have high surface roughness. It is suitable for large-volume, cost-sensitive, and slightly lower performance requirements, such as electronics, chemicals, and general industrial fields.