The Influence Of Material On Key Performance Indicators Of Drawing Dies

1.Wear resistance and service life ‌ 

Hard alloy die: Made by sintering tungsten carbide and cobalt, its wear resistance is significantly better than that of steel dies. The service life can be further extended through surface coating ‌.

PCD die: Made by sintering diamond micro-powder at high temperature and high pressure, it has uniform wear and a service life that can reach 50 to 500 times that of hard alloy dies‌. 

Natural diamond dies: It has the longest theoretical lifespan, but due to its anisotropy, it is prone to uneven wear. In practical use, it may not be as good as PCD die ‌.

2.Machining accuracy 

Dimensional accuracy: The tolerance of natural diamond molds can be controlled within ±0.001mm, followed by PCD molds, and that of hard alloy molds is approximately ±0.01mm‌.

Surface finish: Diamond dies have the lowest coefficient of friction (0.1-0.2), and can achieve a surface quality of Ra<0.1μm, which is far superior to that of hard alloy dies ‌.

3.Thermal stability 

PCD die: cobalt-based with a temperature resistance of 650℃and silicon-based with a temperature resistance of 1000℃, suitable for high-speed drawing ‌. 

Hard alloy die: It has a high thermal conductivity and can effectively dissipate the heat generated during drawing ‌. 

Ceramic die: temperature resistance up to 1200℃, suitable for extreme working conditions ‌.