The production of ADI
The material ADI gains ist strength from a special form of heat-treatment. This heat-treatment process is shown in the following diagram:
A-B: Heating stage to 840-950° C
B-C: Austenitizing phase – soaking stage for the saturation of carbon by the austenite
C-D: Quick transfer to a salt bath
D-H: Ausferritizing by isothermal soaking between 250 – 400° Celsius after H: Cooling to room temperature.