9Cr2Mo Forged Steel Cold Roll for stainless steel
Forged steel rolls are treated with dual frequency heating machine
and cold treatment equipment. The whole procedure is
computer-controlled so as to provide rolls with a deep hardened
layer, high and homogeneous hardness, superior wear ability and
sufficient resistance to accident. We produce forged roll for
rolling mills, specialized making kinds of steel forging and
casting mill roll and back up roll.
Forged mill rolls are the important spare parts in the cold rolling
line. As forged mill rolls should bear big rolling force and
instantaneous high temperature for welding line, slag inclusion and
edge crack, forged mill rolls must have good strength, good wear
resistance, heat impact strength, and good fracture toughness.
In order to get best forged raw material, We use electroslag
remelting process to keep forged raw material with pure
composition. With good forging process and heating treatment, We
keep mill rolls with uniform hardness along the body of mill rolls
and minimum hardness drop.
We have a series of advanced machining equipment that meet the
production needs, including centrifugal machine, intermediate
frequency induction furnace, heat treatment furnace, CNC external
grinding machine, CNC grinding machine, vertical gantry milling
machine, turning lathe, and sawing machine.
| Specification | Material | Diameter(mm) | Length(mm) | Weight(Tons) |
| Work Rolls | 9Cr2Mo,9Cr3Mo,MC3,MC5 etc. | Max.φ610mm | Max.6000mm | Max. 8.0T |
| Intermediate Rolls | 9Cr2Mo,9Cr3Mo,MC3,MC5 etc. | Max.φ800mm | Max.6000mm | Max. 8.5T |
| Back-up Rolls | Cr2, Cr3, Cr5,70Cr3Mo etc. | Max.φ1500mm | Max.7000mm | Max. 40T |
| Material | Chemical Composition (%) | |
| C | Si | Mn | Cr | Mo | Ni | V | Cu | P | S |
| 9Cr2Mo | 0.88-0.95 | 0.25-0.45 | 0.20-0.35 | 1.85-2.10 | 0.25-0.40 | ＜0.25 | -- | ＜0.20 | ＜0.015 | ＜0.010 |
| 86CrMoV7 | 0.82-0.90 | 0.15-0.35 | 0.30-0.55 | 1.80-2.40 | 0.20-0.40 | ＜0.25 | 0.05-0.15 | ＜0.20 | ＜0.015 | ＜0.010 |
| 9Cr3Mo | 0.85-0.95 | 0.25-0.45 | 0.20-0.35 | 2.80-3.50 | 0.25-0.40 | ＜0.25 | -- | ＜0.20 | ＜0.015 | ＜0.010 |
| MC3 | 0.82-0.90 | 0.60-0.90 | 0.20-0.45 | 2.80-3.50 | 0.40-0.60 | 0.60-0.80 | 0.05-0.15 | ＜0.20 | ＜0.015 | ＜0.010 |
| MC5 | 0.82-0.90 | 0.30-0.55 | 0.20-0.50 | 4.80-5.40 | 0.40-0.60 | 0.40-0.60 | 0.05-0.15 | ＜0.20 | ＜0.015 | ＜0.010 |
| 70Cr3Mo | 0.60-0.75 | 0.40-0.70 | 0.40-0.70 | 2.50-3.50 | 0.60-0.80 | ≤0.60 | -- | ＜0.20 | ＜0.015 | ＜0.010 |
| 70Cr3NiMo | 0.60-0.75 | 0.40-0.70 | 0.40-0.70 | 2.50-3.50 | 0.60-0.80 | 0.50-1.00 | -- | ＜0.20 | ＜0.015 | ＜0.010 |
| 70Cr3NiMoV | 0.60-0.75 | 0.17-0.37 | 0.20-0.30 | 1.70-2.20 | 0.30-0.50 | 0.30-0.50 | 0.10-0.20 | ＜0.20 | ＜0.015 | ＜0.010 |
Physical Properties
| Designation of rolls | Hardness (HSD) | Depth of hardness (mm) | Hardness deviation (HSD) |
| Work Roll | 70-104 | 10-50 | ±1 |
| Intermediate Roll | 70-85 | 10-50 | ±1 |
| Sendzimir Work roll | 60-66HRC | ≥10 | ±1 |
| Sendzimir Intermediate Roll | 55-60HRC | ≥15 | ±1 |
| Back-up Roll | 60-80 | 10-75 | ±1.5 |
Application
| Designation of rolls | Application | Depth of hardness (mm) |
| 9Cr2Mo | All kinds of rolls | ≥10 |
| 86CrMoV7 | All kinds of rolls | ≥12 |
| 9Cr3Mo | Work rolls & intermediate rolls | ≥15 |
| MC3 | Work rolls & intermediate rolls | ≥20 |
| MC5 | Work rolls & intermediate rolls | ≥25 |
| 70Cr3Mo | Work rolls & back-up rolls | ≥50 |
| 45Cr5NiMoV | Back-up rolls | ≥75 |
