Possibilities of improvement of dies casting tools with duplex treatment

A comparative performance test of duplex treated tools was made in die casting of driving wheels for automobiles with 2 cores in one casting plate. One set of cores was improved with Tenifer® process, while the other was improved with duplex treatment (plasma nitriding + deposition of 4.5 μm thick PVD CrN coating). After 2700 injections surface damages on both types of tools were analysed using optical and scanning electron microscopes.