What material is W9Mo3Cr4V?

W9Mo3Cr4V tungsten molybdenum series universal high-speed steel has strong universality, comprehensive performance surpasses W6Mo6Cr4V2, and low cost. It can still maintain a high hardness at a working temperature of around 600 ℃. Especially suitable for steel used in hot deformation molds and high-speed cutting tools.

● Chemical composition:
Carbon C: 0.77-0.87 (allowable deviation: ± 0.01)
Silicon Si: 0.20-0.40 (allowable deviation: ± 0.05)
Manganese Mn: 0.20-0.40 (allowable deviation: 0.04)
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.030
Chromium Cr: 3.80~4.40 (allowable deviation: ± 0.05)
Nickel Ni: allowable residual content ≤ 0.30
Copper Cu: allowable residual content ≤ 0.25
Vanadium V: 1.30-1.70 (allowable deviation: ± 0.05)
Molybdenum Mo: 2.70-3.30 (allowable deviation: size ≤ 6, ± 0.05; size>6, ± 0.10)
Tungsten W: 8.50~9.50 (allowable deviation: size ≤ 10, ± 0.10; size>10, ± 0.20)
● Mechanical properties:
Hardness: Delivery hardness: (other processing methods) ≤ 269HB; (Annealed) ≤ 255HB. Sample heat treatment system and quenching and tempering hardness: ≥ 63HRC (box furnace), ≥ 64HRC (salt bath furnace)
● Heat treatment specifications and metallographic structure:
Heat treatment specifications: quenching, preheating at 820-870 ℃, heating at 1210-1230 ℃ (salt bath furnace) or 1220-1240 ℃ (box furnace), oil cooling, tempering at 540-560 ℃ twice, each time for 2 hours.
● Delivery status: hot-rolled, forged, and cold-drawn steel bars are delivered in an annealed state, while hot-rolled and forged steel bars are delivered after annealing+other processing methods (peeling, light drawing, polishing, etc.).