Application of Laser Cladding in Steel Metallurgy

Industry demand:

The service environment of steel metallurgical equipment components in the production line is under high temperature, bearing high variable load, suffering alternating cold and heat, corrosion, wear and fatigue conditions. During operation, some cast iron parts are prone to corrosion and wear, and need to be replaced and maintained regularly. Especially in the production and processing of high-end automotive steel plates, the surface quality of parts such as rollers and transfer rollers is extremely demanding. For such parts with large usage and high maintenance frequency, how to further effectively increase the service life and reduce the maintenance cost is of vital importance to the development of the industry. At present, the surface protection layer of steel metallurgical equipment components is mostly prepared by methods such as electroplating, thermal spraying, and arc surfacing. The application of laser cladding technology can  increase the service life of part coatings, reduce maintenance links, and have greater flexibility in the regulation of coating thickness and coating performance.


Laser solution:

Ultra-high-speed laser cladding

It can be used for efficient cladding of wear-resistant and high-temperature-resistant coatings on the surface of shaft parts of different sizes, such as rollers, process rollers, and transfer rollers. The heat input is small and the thermal impact on the matrix material is very limited. When repeated repairs and reprocessing are carried out, it will not cause resistance due to the excessively large and hard heat-affected zone of the matrix; another major advantage is the hardness of the layer is evenly distributed, and the steel plate will not be scratched due to local over-hardness.


High-efficient laser cladding repair

High-efficient laser cladding can be used for the surface coatings of super-large and super-heavy shaft parts, as well as the repair and remanufacturing of partially damaged parts. Such as blast furnace tuyere nozzles, large circular saws, universal joint sleeves, flat head sleeves, cross heads, reducer gear boxes, etc.


Application of specific parts:


Ultra-high-speed laser cladding of cold-rolled looper

As a major key component of the rolling mill, the surface quality of the cold rolling looper roll has a great impact on the quality and production efficiency of the steel rolling process. During the rolling process, the cold-rolled looper undergoes the dual effects of cycle and thermal cycle, and the surface will produce failure defects such as oxidation, cracks, abrasion, and even roll breakage. Using ultra-high-speed laser cladding technology, the alloy, ceramics, and composite cladding powder are processed by laser beam and melted together with the surface metal of the cold-rolled looper, and solidified into a cladding layer with excellent performance. Its surface hardness can reach HRC65. The above provides a guarantee for the cladding layer to obtain excellent wear resistance, corrosion resistance, fatigue resistance and high temperature resistance, and achieve the purpose of saving valuable materials. Therefore, the ultra-high-speed laser cladding technology is suitable for the surface repair of rollers such as local wear, impact, erosion, and oxidation corrosion.


High-efficient laser cladding for guide roller

The guide roller is an important spare part that consumes a large amount in the hot-rolled bar production line, which affects the technical and economic indicators such as the operating rate of the rolling mill. Many guide rollers have insufficient heat resistance, steel adhesion, wear resistance, and poor thermal fatigue performance during operation, which affects the service life and the quality of the rolled material. Laser cladding technology has the advantages of low dilution rate, small heat-affected zone, and easy automation of the process. It can be used to improve the wear resistance, corrosion resistance, fatigue resistance and crack resistance of the guide wheel. Generally, the cladding thickness is only 1-3mm, and the hardness can reach above HRC65. The cladding guide roller can be put into production again, the service life is prolonged, and the production cost is greatly saved.


If you are repairing the steel metallurgical equipment components and have encountered some issues caused by the traditional method, you should try laser cladding to see how effective it can be when it comes to surface enhancement. If you ever has any doubts, you can talk to our experts and even require repaired samples.


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