In modern industry, stainless steel fasteners are widely used in various equipment and structures, such as automobiles, aerospace, electronic equipment and so on. However, these fasteners are vulnerable to damage such as corrosion, wear and fracture during use, which will seriously affect the safety of equipment and structures. Therefore, the repair and reuse of these fasteners has become an important issue. This paper introduces a new laser cladding repair technology for stainless steel fasteners and its application prospect in the industrial field.
Technical principle
Laser cladding repair technology is a surface repair method which uses high energy laser beam to melt and solidify the coating material and the base material at the same time. Compared with traditional repair technology, laser cladding repair technology has the advantages of high efficiency, high precision and high bonding strength. The main process includes pretreatment of substrate surface, selection and preparation of coating material, laser cladding repair, post-treatment and so on.
Equipment and materials
The equipment of laser cladding repair technology mainly includes laser, optical system, motion system, cooling system and so on. Among them, the laser is the core part, which determines the energy, wavelength and pulse width of the laser beam. When choosing a laser, it is necessary to comprehensively consider factors such as the nature of the repair material, the repair thickness and the processing efficiency.
For the laser cladding repair of stainless steel fasteners, stainless steel coating containing chromium, nickel and other elements is usually selected as the repair material. These stainless steel coatings have excellent corrosion and wear resistance and can effectively improve the service life of repaired fasteners.
Operation procedure
Substrate surface pretreatment: The surface of stainless steel fasteners is cleaned, oiled, and rusted to ensure that the surface is clean and free of impurities, so as to improve the bonding strength of laser cladding repair.
Selection and preparation of coating materials: Select the appropriate stainless steel coating materials according to the repair requirements, and prepare the coating suitable for laser cladding.
Laser cladding repair: the prepared coating material is placed on the surface of the fastener, and the coating material is irradiated by a laser to melt and solidify rapidly at the same time as the base material. In this process, the energy of the laser beam, scanning speed and other parameters should be controlled to ensure that the geometry, composition and performance of the cladding layer meet the requirements.
Post-treatment: Necessary post-treatment of the fasteners that have completed laser cladding repair, such as heat treatment, grinding, etc., to eliminate internal stress, improve bonding strength and the surface quality of the repair layer.
Effect and advantage
The repair of stainless steel fasteners by laser cladding repair technology can achieve the following effects and advantages:
Improved corrosion resistance: The repaired fastener surface forms a dense, uniform stainless steel coating, which can effectively resist the erosion of various corrosive media, thereby extending the safe service life of the equipment.
Enhanced wear resistance: Stainless steel coating has high hardness and good wear resistance, which can reduce the wear of fasteners and reduce maintenance costs.
Cost saving: Laser cladding repair technology has higher processing efficiency and lower processing costs, which can effectively reduce repair costs and improve the production efficiency of enterprises.
Environmental protection and safety: Laser cladding repair technology is a non-contact processing method, which can reduce material waste and environmental pollution, and meet the requirements of modern industrial sustainable development.
Application prospect
With the development of science and technology, the laser cladding repair technology of stainless steel fasteners will be more and more widely used. For example, in the field of automobile manufacturing, various stainless steel fasteners of vehicles can be efficiently and accurately repaired to improve the safety and service life of vehicles; In the aerospace field, it can be applied to the repair and reuse of stainless steel fasteners for various precision instruments and aerospace components to improve the reliability and safety of equipment. Therefore, the laser cladding repair technology of stainless steel fasteners has broad application prospects and market potential.
