Designed for initial roughing work rolls in modern hot strip mills. The high-chromium matrix provides exceptional hot hardness and excellent resistance to thermal oxidation, preventing scale adhesion and severe roll profile deterioration.
Tailored for working rolls in universal section mills and structural steel lines. Its superior mechanical performance balances high wear resistance with stable core toughness, guaranteeing highly precise and consistent dimension control for complex profiles.
Engineered for vertical edging stands in both strip and bar/wire rod mills. Outstanding resistance to thermal micro-cracking and mechanical abrasion perfectly protects the roll pass flanks under intense lateral friction.
By integrating a specific carbon range with high levels of Chromium and Molybdenum, we optimize the precipitation of wear-resistant carbides without sacrificing core toughness. The metallurgical specifications for the HCrS grade are detailed below:
| Code (代码) | C | Si | Mn | Cr | Ni | Mo | Barrel Hardness (HSD) | Neck Hardness (HSD) |
|---|---|---|---|---|---|---|---|---|
| HCrS | 1.00-1.80 | 0.40-1.00 | 0.50-1.00 | 8.00-15.00 | 0.50-1.50 | 1.50-4.50 | 70-85 | 35-45 |
Why does the DURON HCrS roll excel in demanding roughing applications?
Tough Steel Matrix : Unlike cast iron rolls, the lower carbon content (1.00-1.80%) forms a robust steel matrix. This provides superior resistance to mechanical shocks and crack propagation, making it highly reliable for operations involving heavy reductions and high impact loads.
Optimized Thermal Resistance : The strategic addition of high Molybdenum (up to 4.50%) significantly enhances the material’s high-temperature strength. This structural feature assists the roll surface in resisting thermal fatigue and delays the onset of severe fire crazing.
Wear-Resistant Carbide Network: The 8.00-15.00% Chromium content facilitates the precipitation of hard, disconnected carbides within the matrix. This configuration supports consistent surface retention, helping to sustain uniform profile dimensions across extended roughing campaigns.
Every roll undergoes rigorous Ultrasonic Testing (UT) at the working layer and bonding zone to eliminate internal voids and ensure structural integrity under heavy loads.
Roll necks and barrel profiles are machined using heavy-duty CNC equipment, strictly adhering to your drawing's dimensional and runout tolerances for perfect bearing fitment.
Chemical compositions are analyzed via spectrometer pre-pouring, and multi-point hardness mapping is conducted post-heat treatment to guarantee the specified hardness gradient.
All dispatched rolls are accompanied by a comprehensive inspection certificate, documenting chemical composition, hardness distribution, and UT reports.
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