In the oilfield operation environment, a large number of used plunger rods will be produced every year, in line with the purpose of repairing the old and utilizing the old to achieve cost reduction and efficiency for the enterprise, the used plunger rods can be remanufactured and surface strengthened by using high-speed laser cladding technology as the core technology. The following is an introduction to the application of high-speed laser cladding technology in the remanufacturing of plunger rods.
The traditional surface treatment process for plunger rods includes electroplating, spray welding and so on. Electroplating has been gradually eliminated due to the problems of environmental pollution and poor plating performance; spray welding Ni60 technology can be suitable for surface strengthening layer performance, but due to the large heat input, not only on the mechanical properties of the substrate has a significant impact, but also the deformation is serious, the effective thickness of the fused layer after machining is poor, easy to deform the connection of the plunger rod leading to the scrapping of the workpiece. Therefore, the flame spraying technology is not suitable for the remanufacturing of the plunger rod, and the surface strengthening of the plunger rod using this technology is not suitable for the remanufacturing of blanks.
Different from the traditional laser cladding, high-speed laser cladding can melt or semi-melt the powder on top of the molten pool by changing the process of the laser and the powder, and then send the molten or semi-molten liquid into the molten pool to form a metallurgically bonded surface coating, which improves both the cladding efficiency and surface quality. Compared with spray welding and traditional laser cladding, it has the advantages of high efficiency, small heat input, small dilution rate, thin layer cladding, smooth surface and small subsequent processing.
High-speed laser cladding technology as the core of the entire piston rod remanufacturing production process is green, environmentally friendly, pollution-free. Through the use of environmentally friendly high-speed laser cladding technology for surface strengthening, the plunger rod service life is significantly improved, extending the replacement cycle, reducing equipment operation and maintenance costs; in addition, high-speed laser cladding technology as the core of the remanufacturing of used plunger rods, not only to improve the service life of the product, reduce production and operating costs, but also to realize the open source of income and expenditure, and the obvious social, environmental and economic benefits.
The application of high-speed laser cladding technology in the remanufacturing of plunger rod：
- High-speed laser cladding technology for remanufacturing or surface strengthening of the plunger rod has the following characteristics:
- Low heat input, small deformation, high efficiency, uniform thickness of the cladding layer, and small damage to the life of the substrate;
- High-speed laser cladding can be used to remanufacture surface-strengthened plunger rods after use, which saves the raw material procurement cost of the rods and part of the machining work;
- High-speed laser cladding metal-based composite powder hardness of the cladding layer is greater than HRC55, the cladding layer's wear and corrosion resistance and erosion resistance is not less than the spray welding of Ni60, the thickness of the cladding layer is uniform, the cladding layer thickness difference in machining within 5 microns, the service life of the piston rod has been greatly improved.
The entire plunger rod remanufacturing production process centered on high-speed laser cladding technology is green, environmentally friendly and pollution-free. Ruifeng photoelectric laser focus on sixteen years of research and development technology and production, with many years of experience in laser equipment research and development, product technology is mature, product performance safety and stability. The company follows the "technological innovation, product innovation, service innovation" business philosophy, to provide customers with the best quality products and services.
The above is the application of high-speed laser cladding technology in the remanufacturing of piston rods, due to the surface quality of the coating is significantly higher than the ordinary laser cladding, only a simple grinding or polishing can be applied, so the waste of materials, the amount of subsequent processing is greatly reduced, in terms of cost, efficiency, and the thermal impact of the parts of the ultra-high-speed laser cladding has irreplaceable application advantages.
