In steel production, rolls are essential consumable components in the rolling process, whose performance and quality directly impact rolling efficiency and product quality.
With the continuous development of the steel industry, performance requirements for rolls are becoming increasingly demanding. Traditional roll repair and strengthening methods can no longer meet these needs.
As an advanced surface treatment technology, laser cladding can form a high-hardness, wear-resistant coating on the roll surface, significantly enhancing the roller’s wear resistance.
Compared with traditional surface treatment methods such as surfacing and electroplating, laser cladding offers higher hardness and superior wear resistance, effectively resisting wear during steel rolling and extending the roller’s service life.
Laser cladding technology enables precise control over the thickness and shape of the cladding layer, greatly improving the surface flatness and finish of the roller.
This helps enhance the surface quality of rolled steel products and reduces quality issues caused by roller surface defects.
Steel Work Rolls
Repairing worn rolls through laser cladding technology can avoid the need for roll scrapping and replacement, significantly reducing production costs.
Additionally, the laser cladding layer has a long service life, which reduces the frequency of roll maintenance and replacement, further lowering production costs.
Repair and Strengthening of Backup Rolls
Backup rolls are critical components in the steel rolling process. They endure enormous pressure and friction, making them prone to wear and fatigue damage.
Using laser cladding technology to repair and strengthen backup rolls can form a high-strength, highly wear-resistant cladding layer on the surface, thereby extending their service life.
For example, HANI uses laser cladding technology to repair its backup rolls. The service life of the repaired rolls has increased by more than two times, greatly reducing the company’s production costs.
Surface Strengthening of Work Rolls
Work rolls are the rolls that directly contact the rolled material. Their surface quality and performance significantly impact the quality of rolled steel products.
By applying a layer of high-performance alloy material to the work roll surface through laser cladding technology, the hardness, wear resistance, and corrosion resistance of the work roll can be improved, enhancing the surface quality of rolled steel products.
For instance, a rolling mill using laser cladding technology to strengthen its work rolls reduced the surface roughness of rolled steel products by over 50%, significantly improving product quality.
Repair of Special-Shaped Mill Rolls
Special-shaped rolls have complex geometries, making traditional repair methods challenging to ensure quality. Laser cladding technology can accurately clad the required materials onto the surface of special-shaped rolls according to their shape and size, achieving high-quality repairs.
For example, a steel mill using laser cladding technology to repair its special-shaped rolls achieved restored dimensional accuracy and surface quality that met production requirements, saving the company substantial costs and time.
