Core materials and performance parameters of hard alloy molds
Jun 29,2026
Basic Material System
The mainstream is tungsten cobalt WC Co alloy, which is divided into four grades according to grain size: nanocrystalline, ultrafine grain, fine grain, and medium coarse grain. Cobalt content is adjusted according to demand to balance hardness and toughness; Nickel based hard alloy is selected for non-magnetic working conditions to avoid magnetization interference with the workpiece.
Key performance indicators
Ultra high hardness: HRA85~93, far exceeding quenched die steel (HRC60-65), with wear resistance 10~50 times that of ordinary steel molds;
Long service life: The service life of cold heading and stamping conditions is increased by 10-30 times, significantly reducing the frequency of downtime and mold replacement;
Excellent dimensional stability: The thermal expansion coefficient is only one-third of that of steel, and the tolerance remains stable for a long time under high temperature and high-speed processing, with a tolerance of ± 0.01~± 0.02mm;
High temperature thermal hardening: maintaining high hardness at 600 ℃, suitable for hot forging and hot extrusion processes;
Anti sticking mold and corrosion resistance: Forming stainless steel, copper aluminum, and powder materials is not easy to strain the workpiece, and is resistant to acid and alkali slight corrosion;
High compression and bending resistance: With a bending strength of 2500-4000MPa, it can withstand large impacts and high-pressure forming without cracking or deformation.
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