M330 Mold Steel Features:
High-chromium stainless steel with acid resistance, extremely wear-resistant molds after hardening, excellent cutting and polishing performance.
M330 Mold Steel Composition %
C carbon 0.41
CR铬14.30
Mn锰0.45
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Mo钼0.60
V钒0.20
Si硅0.70
M330 Mold Steel Usage:
It is suitable for all acidic plastic molds, such as P.V.C products, and transparent plastic molds, such as optical products.
M330 mold steel heat treatment process
Forging: Start forging at 1050°C and return to 850°C to cool slowly.
Annealing: 800-850°C after heat preservation furnace cooling 600°C air cooling, hardness up to 225HB.
Stress relief: Heat the furnace with 650°C shielding gas for 1-2 hours.
Quenching: 1000-1050°C heat preservation after quenching oil or air cooling, and instant tempering at 50-70°C. (Hardness up to 55-57HRC)
Tempering: Immediately after quenching, it is put into the furnace for tempering at 200-250 °C, and the tempering time is 2-2.5 hours less.
M330 Die Steel Factory Condition: Soft Return to 225HB (High)