What is the mold steel nitrous seepage?

Chemical thermal treatment of nitrogen infiltration of reactive nitrogen atoms into the surface of the workpiece at a specific temperature. Its purpose is to improve the workpiece surface hardness, wear resistance, fatigue limit, heat, and bite resistance. General die casting mold after quenching and tempering (45~47HRC), the nitride layer depth is 0.15~0.2mm. There is a gas nitrous, ion nitride. H13 steel is used as the hollow mold of extruded aluminum profile, with 1,080℃ oil quenching + 560%: x2h twice tempering, the hardness of 48HRC. After 520℃ x4h of ion nitrogen infiltration, the mold-extruded profiles were increased by 4,500kg from 1,000kg for a trifold increase in life.