Cemented carbide is a mixture produced by metal carbide powder and
cobalt. Tungsten carbide, titanium carbide, tantalum carbide and
vanadium carbide are usually use to improve the carbide properties,
thus cemented carbide has high hardness and high wear resistance.
Alloy is a kind of high-efficiency tool material. It is made up of
the mixture of high-melting-point and high-hardness metal carbide
powder and binder and then pressed into workpiece of various shapes
by powder metallurgy method, therefore, to ensure that the cemented
carbide has certain hardness, strength and toughness.
Carbide insert pin, also known as tungsten steel insert pin and
hard alloy punching pin, is made up of hard alloy rods, with high
precision, high hardness and good bending strength, suitable for
hardware and electrical processing industry, generally used for
punching on stamping dies to separate or plastically deform the
material to obtain the required parts. Due to its advantages of
high hardness, long service life, corrosion resistance and no rust,
it is widely used in industrial machinery manufacturing and
As a precision mold, the consistency for the carbide insert pin is
a key factor, which will directly affect the life of the mold and
the dimensional accuracy of the product. It is not only the rough
processing of carbide rods but also the fine-size processing of
hard alloy punches. It is essential to strictly control the
dimensional tolerance requirements and the consistency of mass
From raw material production to finished product processing, the
hard alloy insert pins of our company are complete and perfect. The
whole project is based on the cemented carbide production process.
The ingredients are mixed thoroughly → pulverized → dried → sieved,
then added to the forming agent → re-dried → sifted to obtain the
mixture → pressing the mixed granulation → forming → low-pressure
sintering → sintered blank → inspection (non-destructive ultrasonic
testing) → blank dimensional accuracy inspection → EDM (or wire
cutting) → rough grinding → fine grinding → polishing → inspection
→ marking → packaging. Mass production of carbide insert pin
requires product consistency, which directly affects production
efficiency. Carbide punching pins produced by our company, whether
it is custom-made or mass-produced, always controls each processing
procedure to ensure the consistency of the carbide insert pins.
The carbide insert pins of our company use high-quality grade alloy
materials. The physical parameters are as follows:
1. CO content: 10% ~ 12%
2. Density (g/cm³): 14.0 ~ 14.5
3. Hardness: 89 ~ 92.0 HRA
4. Grain size: 0.6 ~ 1.2 um
5. Bending strength: 4000MPa
6. Modulus of elasticity (GPa): 490.
7. Thermal expansion coefficient 10-6/0C: 5.4.
8. The dimensions and specifications of the carbide insert pins are
customized according to the drawings, and the precision
requirements can be ±0.001.
Our company is specializing in producing and manufacturing hard
alloy insert pins for precision mold customers. It is used with
electronic ceramic injection molds. The precision requirements are
very high, and the perfect consistency of products is the primary
standard of this set of products. The tungsten carbide punching pin
equipped in electronic ceramic precision mold is used in large
number, and each insert pin is required to maintain good
consistency. This requires that the finishing process must strictly
control each processing procedure. Our company can produce the hard
alloy insert pins according to the requirements of the precision
mold manufacturer. The consistency of the products can be
guaranteed, and the tolerance requirements are +0.002. The finish
of the punch needles is required to be 0.2, which meets the highest
requirements of applications in electronic ceramic injection molds.