Laser cladding technology for repairing carbide picks

Carbide picks are an important part of the mining tools in the coal mining industry. They are also one of the vulnerable parts of coal mining and tunnel excavation machinery. Their performance directly affects the production capacity, power consumption, working stability, and performance of the shearer. There are many types of carbide picks for the service life of other related parts. The general structure is to embed a carbide tip on a quenched and tempered low-alloy structural steel cutter body. Today, we will share with you how to use laser cladding technology to repair cemented carbide picks.

Carbide picks are subjected to high periodic compressive stress, shear stress, and impact load during operation. The main failure modes are the cutter head falling off, chipping, and wear of the cutter head and cutter body. Due to the good mechanical properties of the pick cutter body Damage directly affects the service life of the pick, so the material of the pick body and effective heat treatment method should be reasonably selected, the tungsten carbide is one of the most popular materials.

Carbide Picks are wearing parts of mining machinery. Through long-term analysis and research on picks, the reliability of shearer picks has been evaluated from several aspects such as the selection of new picks, pick layout, and pick structure improvement. A simple analysis can improve the shearer's reliability and increase the shearer's effective working time. The reliability of the shearer pick is related to various factors such as the pick itself, factors of the shearer, and conditions of the coal seam.

The working environment of coal mine machinery is complex and harsh. Dust particles, harmful gases, moisture, and cinders cause wear and corrosion to mechanical equipment, shortening the service life of equipment, such as picks, transport troughs of scraper conveyors, hydraulic support columns, gears, and shafts. Parts, etc. Laser cladding technology can be used to strengthen or repair parts that are prone to failure, improve wear resistance and corrosion resistance, and extend the service life of equipment.

Ultra-high-speed laser cladding is the most competitive process that can replace electroplating technology. It is mainly used to improve the wear resistance, corrosion resistance, high-temperature resistance, and oxidation resistance of the surface of parts, thereby achieving surface modification or repair. The goal is to meet the requirements for specific properties of the material surface.

Ultra-high-speed laser cladding technology essentially changes the melting position of the powder, so that the powder melts when it meets the laser above the workpiece and is then evenly coated on the surface of the workpiece. The cladding rate can be as high as 20-200m/min. Due to the small heat input, this technology can be used for surface cladding of heat-sensitive materials, thin-walled and small-sized components. It can also be used for new material combinations, such as aluminum-based materials, Preparation of coatings on titanium-based materials or cast iron materials. Since the surface quality of the coating is significantly higher than that of ordinary laser cladding, it only needs simple grinding or polishing before application. Therefore, material waste and subsequent processing volume are greatly reduced. Ultra-high-speed laser melting has lower cost, efficiency, and thermal impact on parts. Fudu has irreplaceable application advantages.

The use of ultra-high-speed laser cladding technology can perfectly solve the problems of shearer cemented carbide pick bits, such as chipping and wear of the cutter bits and cutter bodies, improve the service life of the picks, and reduce usage costs. Zhuzhou Better Tungsten carbide has a variety of surface strengthening technologies. It has rich experience in laser cladding, flame cladding, vacuum cladding, etc., providing customers with solutions to solve various difficulties. For the cemented carbide picks, which are vulnerable parts in coal mining, it is most suitable to use laser cladding technology to repair them.