Application and Efficiency Improvement of Laser Surface Strengthening Technology in Iron and Steel Industry
With the increasing maturity of metallurgical technology, cost reduction and efficiency improvement remain the core pursuit of iron and steel enterprises. As a key means in the field of remanufacturing, laser surface strengthening technology, through processes such as cladding, quenching, and alloying, can not only repair waste components to extend their service life but also improve the performance of new products, effectively reducing equipment downtime. It has become an important technical support for improving quality and efficiency in the iron and steel industry.
Laser Cladding Protection for Key Hot Rolling Components
Side guide plates and furnace bottom rolls are vulnerable core components in hot rolling production lines. Traditional side guide plates have a service life of less than 24 hours in harsh sections, which easily cause problems such as steel adhesion and nodulation; furnace bottom rolls operate in high-temperature and corrosive environments for a long time, and the surface of the roll rings is prone to oxidation and nodulation, leading to surface defects of slabs. After using laser cladding technology to form a high-temperature resistant and oxidation-resistant alloy layer on their surfaces, the service life of side guide plates is significantly extended, and furnace bottom rolls can effectively avoid steel adhesion and nodulation, greatly reducing production costs and quality losses.
Laser Repair and Strengthening of Rolling Mill Structural Parts
The rolling mill housing is a key load-bearing component of hot rolling equipment, and the gaps caused by surface corrosion will directly affect the accuracy of plate shape control. Through laser cladding technology to restore the original shape of the housing frame, there is no deformation, and the wear resistance of the sliding plate mounting surface is enhanced; after laser quenching is applied to the rolling mill housing liner, the surface hardness is significantly improved, and in practical applications, it can achieve 3 months of damage-free operation, greatly extending the maintenance cycle.
Laser Remanufacturing of Transmission System Components
The flat head sleeve of the main transmission system of the finishing mill is prone to failure due to frequent start-ups and stops, with traditional components having short service life and many faults. After remanufacturing the flat head sleeve of the rolling mill main transmission using laser cladding technology, its wear amount is greatly reduced, and the service life is significantly improved. For long shaft components in the transmission system (such as sprocket shafts), laser quenching treatment can achieve surface hardening without deformation, significantly extending their service life.
Laser Alloying Upgrade of Rolls
Rolls are core tools for metal plastic deformation, and they are prone to surface spalling, cracks, and other failures under long-term harsh working conditions. Through laser alloying treatment, a high-performance alloy layer can be formed on the roll surface, endowing it with excellent high-temperature resistance and corrosion resistance. Practical applications show that the steel passing capacity of the treated bar rolls is significantly improved, with no deformation throughout the process, effectively reducing the roll change frequency and production costs.
Technical Advantages and Industry Application Value
Laser surface remanufacturing technology, relying on core advantages such as excellent comprehensive performance, high material utilization rate, and strong process flexibility, has expanded its application scenarios to various iron and steel equipment components such as rolling mill transmission shafts, gear shafts, crane wheels, and scissors. This technology can not only accurately restore the dimensional accuracy of damaged components but also make their performance exceed the level of new products through performance upgrading. It has become a key technical support for iron and steel enterprises to achieve cost reduction, efficiency improvement, and promote green production, and has currently formed a large-scale application pattern in the industry with wide recognition.