Domestic steel mold: W6Mo5Cr4V2
Standard: GB / T 9943-1988
● Features and Scope:
Universal tungsten-molybdenum steel HSS representatives, toughness, wear resistance than W18Cr4V, hardness, red hardness and high temperature hardness considerably. Can be used to manufacture a variety of tools to withstand the impact of a large, generally large and thermoplastic molding cutter knives, but also for the high load of worn parts, cold mold.
● Chemical Composition:
Carbon C: 0.80 ~ 0.90 (tolerance: ± 0.01)
Si Si: 0.20 ~ 0.45 (tolerance: ± 0.05)
Mn Mn: 0.15 ~ 0.40 (tolerance: +0.04)
Sulfur S: ≤0.030
Phosphorus P: ≤0.030
Chromium Cr: 3.80 ~ 4.40 (tolerance: ± 0.05)
Ni: to allow the residual content ≤0.30
Cu: to allow the residual content ≤0.25
Vanadium V: 1.75 ~ 2.20 (tolerance: ± 0.05)
Mo Mo: 4.50 ~ 5.50 (tolerance: Size ≤6, ± 0.05; dimension> 6, ± 0.10)
Tungsten W: 5.50 ~ 6.75 (tolerance: Size ≤10, ± 0.10; sizes> 10, ± 0.20)
Note: According to the agreement, V content can be 1.60 to 2.20
● Mechanical Properties:
Hardness: Delivery hardness :( other processing methods) ≤262HB; (annealing) ≤255HB. Sample heat treatment and quenching hardness: ≥63HRC (box furnace), ≥64HRC (salt bath)
● Heat treatment and microstructure specifications:
Heat treatment specifications: quenching, 730 ~ 840 ℃ preheating, 1210 ~ 1230 ℃ (salt bath) or 1210 ~ 1230 ℃ (box furnace) heating, oil cooler, 540 ~ 560 ℃ tempering two times, each time 2h.
● Delivery status: hot-rolled, forged, cold-drawn steel bars in the annealed condition delivery, hot-rolled, forged steel bars with after annealing + other processing methods (skinned, light pull, grinding or polishing, etc.) processing delivery .