Factory state: soft melting to 225HB (maximum)
Steel characteristics: High chromium stainless steel with acid resistance. After quenching, the mold is extremely wear-resistant and has excellent cutting and polishing properties.
Usage: Suitable for all acidic plastic molds, such as P.V.C products, and for manufacturing technology transparent plastic molds, such as optical products, etc.
Forging: Start forging at 1050℃ and return to furnace for slow cooling at 850℃.
Annealing: 800-850℃ heat preservation and then furnace cooling at 600℃ air cooling, the hardness can reach 225HB.
Stress relief: Use a 650℃ protective gas furnace to heat through and then keep it warm for 1-2 hours.
Quenching: 1000-1050℃, then quenched with oil or air-cooled, and immediately tempered after cooling to 50-70℃. (The hardness can reach 55-57HRC) Tempering: immediately after quenching, enter the furnace for tempering at 200-250°C, and the tempering time is at least 2-2.5 hours. Round (MM) 20.5 25.8 28.8 35.8 40.8 45.8 50.8 55.8 60.8 66.0 71.0 76.0 86.0 91.0 101.5 116.5 131.5 162.0 182.0 202.0 230.0 26 2.5 97X20-25-32-35-40-45-50
1,000X20-25-28.5-32-35-40-45-50-60-70-80-90 C Carbon Cr Chromium Mo Molybdenum Mn Manganese Si Silicon V Vanadium
0.43 13.5 0.6 0.4 0.7 0.2
Item Annealing Quenching Tempering
Cold cutting 800-850℃
Furnace cooling 1000-1050℃
Oil cooling 200-250℃
Put into the furnace
Link to this article：What is M310 steel? What are the applications of M310 steel?
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