(2) Mold ion nitridation
Ion nitriding is a new chemical heat treatment process for improving the wear resistance, fatigue strength and corrosion resistance of mold parts. The production practice proves that the application is good on die-casting molds.
(3) mold chromizing
The chromizing of the die-casting mold can improve the hardness of the cavity (above HV1300), wear resistance, corrosion resistance, fatigue strength and high temperature oxidation resistance. For molds that are subject to intense wear, the service life can be significantly increased.
When the mold is chromized, it is heated to 950 ° C ~ 1100 ° C, and the temperature is kept for 5 h ~ 10 h to form a layer of firmly chromized layer. The thickness of the chromized layer is generally small and does not affect the size of the mold cavity.