Wear-resistant steel pipes
are mainly divided into wear-resistant ceramic pipes, cast stone wear-resistant pipes, cast steel wear-resistant pipes and pasted wear-resistant pipes. Wear-resistant steel pipes are widely used in electric power, metallurgy, mining, coal, chemical and other industries as grinding abrasive materials such as sand, stone, coal powder, ash, aluminum liquid and corrosive media.
Wear resistant steel is also called wear-resistant pipe. It is a steel pipe made by welding a steel plate or a steel strip after being crimped. The wear-resistant pipe has simple production process, high production efficiency, many varieties and specifications, and less equipment, but the general strength is lower than that of seamless steel pipe. Since the 1930s, with the rapid development of high-quality strip continuous rolling production and advances in welding and inspection technology, the quality of welds has been continuously improved, and the variety of wear-resistant pipes has been increasing, and has been replaced in more and more fields. Seamless steel pipe. The wear-resistant pipe is divided into a straight welded pipe and a spiral welded pipe in the form of a weld.
1. High wear resistance:
Wear-resistant steel plate wear-resistant layer thickness 3-12mm, wear-resistant layer hardness can reach HRC58-62, wear resistance is 15-20 times higher than ordinary steel plate, low alloy steel plate performance 5-10 times higher, is high chromium cast iron The wear resistance is 2-5 times or more, and the wear resistance is much higher than that of spray welding and thermal spraying.
2. Better impact performance:
The wear-resistant steel plate is a double-layer metal structure. The wear-resistant layer and the substrate are metallurgically bonded. The bonding strength is high, and the energy can be absorbed in the process of impact. The wear-resistant layer does not fall off, and can be applied to vibration and impact. Under the working conditions, this is not as good as casting wear-resistant materials and ceramic materials.
3. Very good temperature resistance:
Wear-resistant steel alloy carbide has strong stability at high temperature. Wear-resistant steel plate can be used at 500 °C. Other special requirements can be customized to meet the requirements of 1200 °C. Ceramic, polyurethane, high Molecular materials and other materials that adhere to the wear-resistant materials cannot meet such high temperature requirements.
4. Very good connection performance:
The wear-resistant steel plate base is an ordinary Q235 steel plate, which ensures that the wear-resistant steel plate has toughness and plasticity, and provides strength against external force. It can be connected with other structures by welding, plug welding, bolting, etc., and the connection is firm and not easy to fall off. , more connections than other materials;
5. Good choice of performance:
Wear-resistant steel plates are selected from different thickness substrates, and alloy wear-resistant layers of different layers and thicknesses are deposited, and steel plates of different thicknesses and different uses can be obtained, and the maximum thickness can reach more than 30 mm;
6. Very good processing performance:
The wear-resistant steel plate can be processed into different specifications according to requirements, and can be processed, cold-bent, welded, bent, etc., which is convenient to use; it can be welded on the spot to make the maintenance and replacement work time-saving and convenient, and greatly reduce the work intensity.
7. Very good sex price ratio:
The price of wear-resistant steel plate is higher than that of ordinary materials, but considering the service life of the product, considering the maintenance cost, spare parts cost and downtime loss, the performance price ratio is much higher than ordinary steel plates and other materials.
Wear-resistant ceramic tube
It is made by high-tech production process--self-growth high-temperature clutch synthesis method. The tube is composed of three layers of corundum ceramic, transition layer, steel pipe (seamless pipe, welded pipe) from the inside to the outside. The ceramic layer is formed into dense corundum porcelain (AL2O3) at a temperature higher than 2200 ° C, and is formed firmly with the steel pipe through the transition layer. Combine. The composite pipe has fully exerted the strength, toughness, impact resistance, good welding performance and high hardness, high wear resistance, corrosion resistance and heat resistance of the steel tube, which overcomes the low hardness, poor wear resistance and poor toughness of the steel tube. specialty. The outer wall is 6-16 mm thick and 3-8 mm behind the inner wall. Pipe diameter range DN20-DN1500.
Cast stone wear tube
The outer layer is a spiral welded pipe, a seamless pipe or a straight welded pipe, and the inner wall is cast stone. Cast stone is a processed silicate crystalline material, using natural rock (basal rock, diabase and other basic rock, and shale) or industrial waste (blast furnace slag, steel slag, copper slag, zinc slag, ferroalloy) The slag, etc. is the main raw material, and the crystals prepared by the processes of compounding, melting, pouring, heat treatment, etc. are arranged in a regular, hard, and fine non-metallic industrial material. Cast stone has good corrosion resistance and wear resistance, and its Mohs hardness is ~8, second only to diamond and corundum. However, its toughness and impact resistance are poor, and cutting is difficult. The outer wall is 6-12 mm thick and the inner wall is 25-35 mm thick. Pipe diameter range DN100-DN600.
Cast steel wear tube
Cast steel (including alloy steel), its manufacturing process is relatively simple. However, due to the limitations of the material itself and the limitations of the process, the surface hardness of the cast steel material (about 60) is much lower than that of the ceramic (80 or more). The wall thickness is 12-40 mm. Pipe diameter range DN20-DN900.
Paste wear tube
The outer layer is a seamless steel pipe or a straight seam welded pipe, and the inner wall is a wear-resistant ceramic lining plate which is made of AL2O3 as the main raw material (actually corundum ceramic), which is made of rare metal oxide as a flux and is calcined by a high temperature of one thousand seven hundred degrees. Corundum ceramics, which are made of a combination of special rubber and high-strength organic/inorganic binders. The outer wall is 6-12 mm thick and the inner wall is 6-16 mm thick. Not subject to pipe diameter restrictions.