What Is A Tungsten Carbide Punching Ball?

What Is A Hard Alloy Punching Ball?

Tungsten carbide puching balls also calls extrusion balls, are high-hardness spherical tool parts made of tungsten-cobalt hard alloy (WC-Co), mainly used in the extrusion, reaming, straightening and forming processes of metal tubes and bars.

It is usually installed in extrusion dies, guide sleeves or hole structures, achieving precise forming through its high hardness and smooth spherical surface.

Main uses

1. Extrusion forming

The hole diameter control of tubes or bars made of metals such as copper, aluminum, stainless steel and titanium alloy is carried out on the extruder. 

2. Reaming/shrinking of holes

By rolling the hard alloy sphere in the hole, the hole diameter size is gradually increased or fine-tuned to ensure the roundness and smoothness of the inner wall of the product.

3. Straightening and guiding

The extruded hole ball assists the material flow direction with high-precision roundness, making the product forming more stable Wear-resistant parts of molds

As a super wear-resistant component inside the mold county, it extends the overall service life of the mold.

Materials and Properties

Typical materials: WC-Co series cemented carbides such as YG6, YG8, and YG10X

*Has extremely high hardness (HRA 89-92)

*High wear resistance

*High compressive strength (up to over 3000 MPa)

*Good thermal fatigue resistance

Application field

*Extrusion of copper, aluminum and non-ferrous metal tubes

*Manufacturing of stainless steel capillary tubes and automotive oil pipes

*Aerospace precision pipe fittings

*Forming of hydraulic components and medical device pipe fittings

*Hole processing and precise adjustment of wire rods and bars

Summary of advantages

Long service life: High hardness and wear resistance

Stable precision: Ensure consistency of aperture

Strong adaptability: It can be used for extrusion of various materials

Low cost: Small components but significantly extend the mold's lifespan