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FORGE-Roll Sleeve
ETERNAL
Cr3 forged steel roll sleeves are mainly used in rolling equipment for steel rolling, mining, etc. As key components of work rolls, intermediate rolls or backup rolls, the roll sleeves deliver excellent wear resistance and high toughness .Compared with integral forged steel rollers, they have the advantages of lower cost and more convenient replacement.
Cr3 steel material has become one of the most widely‑used roll materials in the modern steel rolling industry.
Typical grades:
8Cr3Mo，8Cr3MoV，9Cr3MoV，9Cr3Mo，70Cr3Mo，70Cr3NiMo，MC3，etc
Element | Content | Function |
C | 0.4~1.0% | Carbon ensures strength and hardness |
Cr | 2.5~3.5% | Chromium improves hardenability, wear resistance, and corrosion resistance to form M3C type carbides |
Mo | 0.2~0.7% | Molybdenum refines grain size and improves hardenability and thermal stability |
Si | 0.2~0.9% | Silicon improves strength and hardenability |
V | 0.05~0.6% | Vanadium refines grain size, improve hardness and wear resistance |
Mn | 0.2~0.85% | Manganese enhances strength and toughness, and improves thermal processing performance |
Ni | 0.2~0.9% | Nickel improves toughness and impact resistance |
P | ≤0.02% | Phosphorus controls impurities to ensure purity |
S | ≤0.015% | Sulfur controls impurities to ensure purity |
Item | Typical |
Surface Hardness | 92-100 HSD |
Tensile Strength | ≥900 MPa |
Hardening Layer | 20-30 mm |
Roll Neck Hardness | 40-50 HSD |
Organizational Characteristics | Martensite (bainite)+M3C type carbides |
We always focus on customers, pay attention to their needs, provide high-quality products and excellent services to meet their expectations.
ETERNAL chooses premium ESR raw material to reduce hydrogen content and non‑metallic inclusions and enhance steel cleanliness.
ETERNAL applies open‑die forging to refine grains, eliminate segregation, ensure microstructure homogeneity and improve mechanical properties
Post‑forging treatment starts with slow cooling to prevent cracking, followed by spheroidizing annealing to reduce hardness for easier machining.
Quenching and tempering treatment is performed to achieve the final mechanical properties.
Application area | Equipment |
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cold-rolled strip steel | Cr3 forged steel roll sleeve can be used as work roll/backup roll/intermediate roll for single/multi stand cold rolling mills and leveling machines | |
hot-rolled strip steel | Cr3 forged steel roll sleeve can be used as work roll/backup roll for hot rolling mills and furnace coil mills | |
non-ferrous metals | Cr3 forged steel roll sleeve can be used as working roll/leveling roll for aluminum/copper strip rolling mill |
During the installation of the Cr3 roll sleeve, ensure the fitting accuracy between the roll sleeve and roll core to avoid aggravated wear caused by loosening.
Control rolling force and temperature during the rolling process to prevent surface cracks induced by thermal shock.
Regularly inspect the surface hardness and wear condition of the roll sleeve, and perform timely grinding‑repair to extend its service life.
Prevent rolling accidents. Although Cr3 material features good toughness, deep spalling may result in roll sleeve scrapping.
Our goal is to work closely with partners to help customers achieve greater success in multiple fields.
We collaborate with reliable logistics partners to provide efficient logistics and delivery services.
We provide comprehensive after-sales service, providing resolutions of any issues and free maintenance and replacement of parts during the warranty period.
We have a professional technical team that can provide technical consultation and support to customers.
From raw materials to the production process and before leaving the factory, all performance indicators are strictly tested, and the professional QC team controls according to the process.
