FDAC with rapid tooling, excellent high temperature strength and wear resistance. Hardness at the factory has reached HRC40-44. So no heat can be used directly in the production. It can greatly reduce the processing time of the mold. Mainly used in the aluminum, zinc, steel forging die plate mold steel forging plate magnesium alloy die-casting molds and extrusion dies. Often used in high hard plastic mold (such as the top of the institutions Division tube), mold and other chemical components such as engine elements C Mn V Si Cr Mo PS Percent (%) 0.33-0.42 0.55-0.75 0.80-1.20 0.30 to 0.80 4.80-5.50 1.20-1.60 0.03 0.10-0.15 FDAC thermal processing project die steel heating temperature / ℃ open forging temperature / ℃ final forging temperature / ℃ Cooling Ingot billets 1140 ~ 11801120 ~ 11501100 ~ 1150 1050 ~ 1100 900 ~ 850 900 ~ 850 slow cooling (cold or sand pits cold) slow cooling (cold or sand pits cold) heat treatment annealing: heating to 800-850 ℃, the temperatures stay in two hours, allowed to cool gradually in the furnace. Quenching: 550-600 ℃, time heated to 850-900 ℃, and then heated to a.l000-1.040 ℃. b.1.040-1.080 ℃ Hardened in oil (a relatively required toughness tool; b than the required hot hardness tool.) Tempering: slow heat to 550-680 ℃, the temperatures stay in, and then in still air cooling, tempering should be secondary. Hardness: HRC530 ℃ or less.