Back-up Rolls
A global supplier of cast and forged steel Back-up Rolls
No matter where you are located, we can supply you with a comprehensive range of forged and cast monobloc steel Back-up Rolls.
Our long experience, coupled with state-of-the-art manufacturing equipment and processes, makes our Back-up Rolls a consistent top performer, and FUSHUN considered a truly global supplier.
We focus on producing back up rolls made from both cast and forged steel to meet all of the various applications and demands in the market place. Our Back-up Rolls are manufactured at our facilities in the China.
Our Back-up Rolls can be supplied in various grades to meet different hardness and wear resistance requirements.
Manufacturing
Forged rolls are manufactured at our plants in the China. We also provide customers with re-hardening and re-cutting service and support.
With FUSHUN extensive knowledge and experience of manufacturing forged work rolls, we can assist clients in selecting the grades and parameters that will assure optimal performance in their mill operations.
Process
Product design → Smelting (EF + ESR) → Forging → (Normalizing) → Spheroidizing and hydrogen annealing → Rough turning of the roll surface (cut test block) → Inspection (UT, macroscopic, microscopic, dimensions, appearance) → Storage and material requisition → Rough machining → Ultrasonic testing → Quenching and tempering treatment → Hardness inspection → Semi-finish machining → Roll neck surface and thrust end surface quenching and tempering → Roll neck hardness inspection → Semi-finish machining → Ultrasonic testing → Roll body surface quenching (+ cold treatment + low-temperature tempering) → Roll body hardness inspection → Finish machining → Inspection → Storage → Rust prevention and packaging → Transportation
Advantages
- ESR steel ingots have high purity.
- Heat treatment is good, and hardness is uniform.
- Machining dimensions are precise.
- No burn issues caused by grinding.
Main Roll Grades
The following table gives a general overview of our main grades in this product segment. Further information about each grade is available in our Product Data Sheets.
| Steel Grade | C | Si | Mn | Cr | Ni | Mo | V |
| 60CrMnMo | 0.55-0.65 | 0.25-0.40 | 0.70-1.00 | 0.80-1.20 | / | 0.20-0.30 | / |
| 60CrMoV | 0.55-0.65 | 0.17-0.37 | 0.50-0.85 | 0.90-1.20 | / | 0.30-0.40 | 0.15-0.35 |
| 75CrMo | 0.70-0.80 | 0.20-0.60 | 0.20-0.70 | 1.40-1.70 | / | 0.20-0.30 | / |
| 70Cr3NiMo | 0.60-0.80 | 0.40-0.70 | 0.50-0.90 | 2.00-3.00 | 0.40-0.60 | 0.25-0.60 | / |
| 9Cr2 | 0.85-0.95 | 0.25-0.45 | 0.20-0.45 | 1.70-2.10 | / | / | / |
| 9Cr2Mo | 0.85-0.95 | 0.25-0.45 | 0.20-0.35 | 1.70-2.10 | / | 0.20-0.40 | / |
| 9CrV | 0.85-0.95 | 0.25-0.45 | 0.20-0.45 | 1.40-1.70 | / | / | 0.10-0.25 |
| 55Cr | 0.50-0.60 | 0.20-0.40 | 0.35-0.65 | 1.00-1.30 | / | / | / |
| 42CrMo | 0.38-0.45 | 0.20-0.40 | 0.50-0.80 | 0.90-1.20 | / | 0.15-0.25 | / |
| 35CrMo | 0.32-0.40 | 0.20-0.40 | 0.40-0.70 | 0.80-1.10 | / | 0.15-0.25 | / |
*P, S, ≤0.025 ； Cu ≤0.25
