Nitriding (gas nitriding) hardens the die surface, significantly increasing wear resistance and die life.
Dies made from hot-work tool steel wear under friction from hot aluminium. Nitriding forms a hard diffusion layer on the steel surface, increasing wear and galling resistance — meaning more pressings (tonnes) and less bearing wear.
The nitriding cycle is applied at controlled time and temperature without distorting the working surface. Periodic nitriding is a key part of a die maintenance programme.
It significantly raises surface hardness and wear resistance; pressings per die increase markedly.
Yes, as the bearing wears, periodic nitriding preserves die life and profile quality.
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