Since the beginning of the 21st century, with the intensification of the energy crisis, countries have begun to increase their ocean development and research. How to avoid the corrosion of metal materials in the marine environment has become a hot spot in the research of marine engineering related technologies.
In the marine environment, improving the corrosion resistance of metal materials is an effective protective measure. Among many surface treatment technologies, laser surface cladding technology has a good effect in improving the corrosion resistance of metal surfaces.
Laser cladding machine refers to the use of high-energy laser beams to irradiate the metal surface, through rapid melting and cooling, cladding a layer of material with special physical, chemical or mechanical properties on the surface of the substrate to form a new composite material. This composite material can give full play to the advantages of the base material and the cladding material, and make up for the shortcomings of the two. Therefore, laser cladding can greatly improve the corrosion resistance of metal materials in the marine environment and prolong the service life of the machine.
Stainless steel can be applied to pumps, valves, fastening rods, etc. in seawater environment. Its corrosion rate in the marine environment is low. The main corrosion forms of stainless steel are pitting corrosion, crevice corrosion and other local corrosion. When the local corrosion is severe, it develops into ulcer corrosion. Conventional stainless steel cannot be widely used in marine engineering due to its poor resistance to pitting corrosion. Although super stainless steel with Mo, Ni and Cr can improve pitting resistance, it is expensive and has poor mechanical properties. However, laser cladding equipment can obtain high-performance precious metal alloy steel surfaces on low-performance cheap steels.
Copper alloy materials have very good seawater corrosion resistance and anti-wear effects, so they are widely used in marine engineering. However, parts of this material will also need to be repaired due to corrosion and wear to restore the size and function of the original parts. Compared with chrome plating, laser cladding technology will not pollute the environment and can overcome the shortcomings of low repair efficiency. Compared with fusion welding, laser cladding machine overcomes the problems of welding deformation and large heat-affected zone, thereby greatly improving the quality of repair. In addition, when removing waste paint and anodized coatings, laser cladding will not damage the performance of basic metal materials.
In summary, laser cladding technology is a rapid solidification technology, which can produce excellent structure and performance that cannot be obtained in a balanced state. Laser cladding can design the composition of the coating according to the performance requirements, and can prepare a high-alloy steel surface layer with excellent performance on cheap steel. In addition, the bonding strength between laser cladding and the substrate is relatively high, which is unmatched by other surface treatment processes. It is especially suitable for the surface treatment and repair of common wearing parts under the conditions of corrosion and wear in the marine environment.
Laser cladding has outstanding performance in improving the corrosion resistance of materials, and has very good use value in the research and development of ocean engineering. With the continuous deepening and development of laser cladding research, especially the study of cracks caused by large-area cladding, laser cladding will be widely used in marine engineering and provide support for the development of marine engineering.
As a laser cladding machine manufacturer, Jinan Senfeng Laser Technology Co., Ltd. has a professional team to design and develop laser cladding machines. If you want to know more about laser cladding machine, please contact SENFENG LEIMING.
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