Scale breaking Support Roller:

Application scope: Acid washing, solid solution

Material selection: GCr15, GCr18Mo.

Process requirements: 

1. Quenching and tempering treatment HB280-320.

2. The surface hardness of the roller is HRC60-62, and the depth of the hardened layer is 5-7mm.

3. The supporting force is greater than 40KN, and the linear speed is 160m/min.

4. The difference in size values between each group shall not exceed 0.005mm.

The Descaling Backup Roll is a core component in modern steel pickling lines and descaling units. It does not directly participate in descaling but provides indispensable rigid support for the descaling work rolls, ensuring the entire descaling process is efficient, stable, and uniform. It serves as the foundation for enhancing overall production line performance and final product quality.

Core Features：

Extreme Rigidity and Strength: Manufactured from high-strength alloy steel forgings and subjected to special heat treatment processes, it possesses exceptional mechanical strength and anti-deflection capabilities, enabling it to withstand the immense torque and reactive forces generated during descaling.

Superior Wear and Fatigue Resistance: The roll body surface is typically hardened through hardfacing with wear-resistant alloys or deep quenching, granting it excellent abrasion resistance and contact fatigue resistance, significantly extending its service life under demanding operating conditions.

High Precision and Dynamic Balance: Precision machining and strict dynamic balance correction ensure stable operation at high speeds, effectively reducing vibration and guaranteeing uniform surface treatment of the strip steel.

Optimized Bearing Housing Design: Equipped with heavy-duty, high-rigidity bearing housings and sealing systems, it ensures even load distribution, adequate lubrication, and effective protection against contamination, enabling long-term, maintenance-free stable operation.

Key Advantages：

Improved Descaling Efficiency and Quality: Provides absolutely reliable support, allowing the descaling work rolls to perform at their best, achieving uniform and thorough removal of scale, and laying the groundwork for a high-quality, clean steel surface.

Protection Critical Equipment: Its immense rigidity effectively suppresses bending deformation of the work rolls, protecting these more expensive components and extending the service life of the entire descaling unit's spindle and bearings.

Reduced Total Cost of Ownership: An extended service life and exceptional durability significantly reduce the frequency of spare part replacements and downtime for maintenance. Furthermore, the superior descaling results directly lower acid consumption in subsequent pickling stages.

Increased Production Line Capacity: High reliability allows the descaling unit to operate stably under higher tension and speed, directly increasing the throughput of the entire pickling line.

Primary Application Areas：

Descaling Backup Rolls are widely used in all continuous processing lines that require efficient removal of scale from hot-rolled steel surfaces, primarily including:

Carbon and Stainless Steel Pickling Lines

Metal Strip Finishing and Processing Lines

Steel Tube and Bar/Wire Pre-treatment Lines