The custom tungsten carbide cold forming die bears the heavy pressing load, and its female die surface bears high-pressure stress so that the die core material is required to have high strength, toughness and wear resistance, tungsten carbide with high cobalt content(Most grades applied to the heading die core contains cobalt more than 12%, some even reach up to 25%) can perfectly meet this requirement, so all better heading die with long service time use tungsten carbide as die core material, and the outer case of the die is made of hot working die steel (the hardness after heat treatment is about HRC 45). The core is inserted the outer case by cold pressing or hot pressing method, so as to make the core and case combine tightly, and the outer case causes certain compressive stress to the inner core, which improves the service conditions of the die and extends the service time of the die.

The custom tungsten carbide cold forming die (also mentioned as cold header dies) for fastener industry can be divided into cutting die, forming die, and trimming die as per the different production process of a fastener product, and forming die includes the first station, second station, third station, up to the fifth station for some complicated items. Divided by detailed fastener products, there are bolt die, screw die, nut die, hexagon nuts with flange die, drill point die etc. The carbide grade for flanged hexagon nuts is special, please check with Betalent carbide sales person. 

In addition to custom tungsten carbide cold forming die upsetting, there is also a warm heading or hot heading process used in fastener manufacturing, especially for large size or complicated deformation fastener blanks, when cold heading may cause heading defects. 

You can customize tungsten carbide cold forming die the size you need, welcome to consult!