As a surface treatment technology, laser cladding strengthening technology has the characteristics of high energy density, fast heating and cooling, and is widely used in the surface strengthening of various materials. In the metallurgical industry, the high-temperature rotary shaft is one of the key components, and its performance directly affects the stability and efficiency of the entire production line. Therefore, laser cladding strengthening of high-temperature rotary shafts is of great significance.
1. Principle and characteristics of laser cladding strengthening
Laser cladding strengthening is the use of high-energy laser beam to quickly melt the material, and quickly cool and solidify in a very short time to form a coating with excellent performance, so as to achieve the purpose of surface strengthening. Compared with traditional surface treatment technology, laser cladding strengthening has the following advantages:
1. The cladding layer and the matrix material are metallurgically combined, and the bonding strength is high
2. Local reinforcement can be realized, and the operation is flexible and convenient
3.The cladding layer has a dense structure and no defects such as porosity and slag inclusion
4. It can achieve large-area rapid cladding and high production efficiency.
Second, the necessity of metallurgical high-temperature rotary shaft laser cladding strengthening
The high-temperature rotary shaft in the metallurgical industry will be subject to severe wear and corrosion during the working process, resulting in reduced performance and shortened life. Traditional surface treatment technologies are difficult to meet the requirements of extreme working conditions such as high temperature and high load. Laser cladding strengthening technology can greatly improve the surface hardness and wear resistance of the rotary shaft, and effectively prolong its service life. It can also improve its corrosion resistance and high-temperature performance to ensure the stability and efficiency of the production line.
3. Metallurgical high-temperature rotary shaft laser cladding strengthening process
1. Surface pretreatment:Clean, degreas, and remove rust on the surface of the rotary shaft to ensure that the surface is clean and free of impurities
2. Selection and preparation of coating materialsAccording to the specific working conditions and use requirements, select the appropriate coating material, and prepare it into a powder with a certain particle size
3. Laser cladding strengthened repair:The powder is evenly coated on the surface of the rotary shaft and rapidly melted, cooled and solidified using a high-energy laser beam
4. Post-treatment of laser cladding repair:The rotary shaft after laser cladding repair is ground and polished to remove surface burrs and residual stress
5. Performance testing and evaluationThe performance test and evaluation of the laser cladding strengthened shaft are carried out to ensure that the expected strengthening effect is achieved.
Fourth, metallurgical high-temperature rotary shaft laser cladding strengthening application examples
The high-temperature shaft of a steel company has serious wear and corrosion problems in the process of use, resulting in reduced production efficiency and increased maintenance costs. In order to solve this problem, the surface treatment of the rotating shaft is carried out using laser cladding strengthening technology. After a series of processes, the surface strengthening of the rotary shaft can be realized. After a period of use and verification, it was found that the performance of the shaft strengthened by laser cladding was significantly improved, the service life was significantly extended, and it could withstand higher temperatures and loads. The application of this technology can save enterprises a lot of maintenance costs and downtime, improve production efficiency and product quality.
V. Conclusions
Laser cladding strengthening technology has significant advantages and application prospects in metallurgical high-temperature shaft surface treatment. By strengthening the surface of the shaft, its hardness and wear resistance can be greatly improved, its service life can be prolonged, and its corrosion resistance and high temperature performance can be improved. The application of this technology will bring huge economic benefits and competitive advantages to enterprises. With the continuous development and improvement of laser cladding technology, it is believed that it will be more widely used in the metallurgical industry.