Roll Laser Cladding Repair Processing Technology

In modern industrial production, roll as an important processing equipment, its quality and performance directly affect the quality of products and production efficiency. However, the roll in the use process due to various reasons, such as wear, corrosion, thermal fatigue, often appear surface damage, which will not only reduce the service life of the roll, but also have an adverse effect on product quality. Therefore, the research and application of roll repair processing technology is of great significance.

I. Roll laser cladding repair processing technology principle

Laser cladding repair technology is a new technology that uses high energy density laser beam as heat source to cladding one or more layers of alloy powder with specific properties on the roll surface to achieve surface repair and strengthening. The technology mainly includes the following steps: First, the roll surface is pre-treated, such as cleaning, rust removal, sand blasting, etc., to ensure a good combination between the cladding layer and the substrate; Secondly, the appropriate alloy powder is selected as the cladding material and evenly coated on the roll surface; Then, the cladding material is heated by high energy density laser beam to melt it and form metallurgical bond with the substrate. Finally, the subsequent treatment of the cladding layer, such as grinding, polishing, etc., to improve its surface quality.

II. Roll laser cladding repair processing technology characteristics

1, high efficiency and energy saving: laser cladding repair processing technology has the characteristics of fast heating speed, high energy density, small heat affected zone, etc., can achieve rapid cladding and improve repair efficiency. At the same time, the technology uses non-contact heating, reducing energy consumption and environmental pollution.

2, the cladding layer quality is good: laser cladding repair processing technology can form a dense, uniform, no porosity cladding layer, and the cladding layer and the substrate to form a good metallurgical bond, with high strength and hardness. In addition, the wear resistance, corrosion resistance and thermal fatigue resistance of the roll surface can be improved by selecting suitable cladding materials.

3, wide range of application: laser cladding repair processing technology is suitable for roll repair of various materials, such as steel, iron, copper, aluminum and so on. At the same time, the technology can also repair the roll surface locally or as a whole to meet different production needs.

4, high degree of automation: laser cladding repair processing technology can be combined with computer numerical control technology to achieve automatic operation and intelligent control. By programming the moving trajectory and cladding parameters of the laser beam, the precise cladding repair effect can be achieved.

III. Roll laser cladding repair processing technology application

Roll laser cladding repair technology has been widely used in steel, non-ferrous metals, machinery manufacturing and other fields. In the iron and steel industry, the technology is mainly used for the repair of roll surface wear, corrosion and thermal fatigue. In the non-ferrous metal industry, the technology can be used to repair roll surface oxidation, spalling and other problems; In the field of mechanical manufacturing, the technology can be used to repair and strengthen various tools such as molds and tools. By applying this technology, the service life of the roll can be extended significantly, and the product quality and production efficiency can be improved.

IV. The development prospect of roll laser cladding repair processing technology

With the continuous development of laser technology and the continuous expansion of application fields, the laser cladding repair processing technology of roll will be more widely used in the future. On the one hand, with the improvement of laser power and accuracy, laser cladding repair processing technology will be able to achieve more fine and more efficient repair effects; On the other hand, with the continuous emergence of new materials and new processes, laser cladding repair processing technology will be able to be applied to more types of roll repair and performance improvement. In addition, with the improvement of environmental awareness and the strengthening of energy saving and emission reduction requirements, laser cladding repair processing technology, as a green and efficient repair technology, will get more attention and application.

In a word, as an advanced repair technology, the roll laser cladding processing technology has the characteristics of high efficiency and energy saving, good quality of cladding layer, wide application range and high degree of automation. By applying this technology, the service life of the roll can be extended significantly, and the product quality and production efficiency can be improved. In the future, with the continuous development of laser technology and the continuous expansion of application fields, the technology will play a more important role in the field of roll repair.