Type of wear-resistant steel use method of wear-re

2022-07-22
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Wear resistant steel is a kind of building material. Its main performance is wear resistance and long service life, so it is very popular in the industry. Wear resistant steel is mainly divided into high manganese steel, medium and low alloy wear-resistant steel, chromium molybdenum silicon manganese steel, gas corrosion resistant steel, wear-resistant steel and special wear-resistant steel

wear resistant steel is widely used in mechanical manufacturing, mainly in the selection of mechanical component materials, steel balls of ball mills, lining plates, bucket teeth and buckets of excavators, grinding walls, tooth plates and hammers of various crushers, crawler plates of tractors and tanks, strike plates of fan mills, railway frogs, middle groove plates, groove sides and ring chains for coal mine scraper conveyors, shovels and shovel teeth for bulldozers, Lining plates for large electric wheel bodies, cone bits for perforating oil and open-pit iron mines, etc. The following editor will introduce the types of wear-resistant steel and the use methods of wear-resistant steel

types of wear-resistant steel

1. High manganese steel

the as cast structure of high manganese steel is usually composed of austenite, carbide and pearlite, and sometimes contains a small amount of phosphorus eutectic. When the amount of carbide is large, it often appears as a network on the grain boundary. Therefore, as cast high manganese steel is brittle and cannot be used, so it needs solution treatment. The commonly used heat treatment method is solution treatment, that is, the steel is heated to 1050 ~ 1100 ℃, and the as cast structure is eliminated by heat preservation to obtain single-phase austenite structure, and then water quenched to keep this structure at room temperature. After heat treatment, the strength, plasticity and toughness of the steel are greatly improved

2. Medium and low alloy wear-resistant steel

this kind of steel has high hardness (Brinell hardness can reach hb500) and weldability. This kind of steel is usually rolled into steel plates or sections, and then welded into components. Low alloy steel used under working conditions with wear as the main failure mode. It is mainly divided into low-alloy welding wear-resistant steel, low-alloy wear-resistant steel for construction machinery parts and low-alloy wear-resistant steel for agricultural machinery

3. Chromium molybdenum silicon manganese steel

silicon manganese alloy is an alloy composed of manganese, silicon, iron and a small amount of carbon and other elements. It is a ferroalloy with wide applications and large output. Silicon manganese alloy is not only a common Compound Deoxidizer in steelmaking, but also a reductant in the production of low-carbon ferromanganese and metallic manganese by electro silicothermic method. Silicon manganese alloy can be smelted continuously in large, medium and small submerged arc furnaces

4. Special wear-resistant steel

steel used under specific working conditions, such as impact wear, corrosion wear, high temperature erosion wear, etc

usage of wear-resistant steel

1. Cutting: plasma cutting, carbon arc and grinding wheel saw can be used to cut a large area of clad steel plate into the required shape. The best method is to cut with air or inert gas plasma arc. The recommended method is to cut from the alloy surface. Carbon arc cutting shall start from one side of the substrate. If the saw blade is used, only linear cutting can be carried out, and silicon carbide saw blade is required

2. Bending: the wear-resistant steel plate can be cold formed and bent into the required shape, or arc or circle, as required. Concave forming, alloy cracks will be tightly closed due to internal stress; Convex forming, the crack will become larger and crack, which is a normal site. If the crack is too large, repair it with corresponding welding rod. Crimp into tubes according to the recommended minimum bending radius

3. Tapping: plasma cutting can be used for large holes, and EDM machine is recommended for small holes. Countersunk holes for assembling bolts can be cut by plasma or carbon arc

4. Welding: the base metal of large-area composite steel plate is a steel plate with good weldability. When two steel plates need to be spliced, the back base metal can be welded together first, and then the front surfacing layer can be filled with corresponding surfacing electrodes. Wear resistant steel plates can also be welded to other steel structures

5. Plug welding: plasma or carbon arc gouging can be used to make holes on wear-resistant steel plates and connect with other steel structures by plug welding

6. Bolt fixation: bolts can be welded to the base metal of steel plate by flash welding or melt welding, and then connected with other workpieces, or holes can be made on wear-resistant steel plate, and connected with other workpieces by bolts

7. Surface processing: the wear-resistant steel plate indicates that there is no need to process. If it needs to be processed, it can only be ground, and other conventional methods are not applicable. Wear resistant steel plates are not suitable for occasions requiring high surface accuracy

wear resistant steel application

wear resistant steel is widely used in mining machinery, coal mining and transportation, engineering machinery, agricultural machinery, building materials, electric machinery, railway transportation and other departments. For example, steel balls, liners of ball mills, bucket teeth and buckets of excavators, rolling mortar walls, toothed plates and hammers of various crushers, crawler plates of tractors and tanks, strike plates of fan mills, railway frogs, middle groove plates, groove sides and ring chains for scraper conveyors in coal mines, shovels and teeth for bulldozers, liners for large electric wheel carts, roller bits for perforating oil and open-pit iron mines, etc, The above list is also mainly limited to the application of wear-resistant steel subject to abrasive wear. In all kinds of machinery, all workpieces with relative motion will produce various types of wear, and there will be requirements to improve the wear resistance of workpiece materials or to use wear-resistant steel. There are countless examples in this regard. Grinding media (balls, rods and liners) used in ore and cement mills are steel wearing parts with large consumption. In the United States, most grinding balls are forged or cast from carbon steel and alloy steel, accounting for 97% of the total consumption of grinding balls. In Canada, steel balls account for 81% of the consumption of grinding balls. According to statistics at the end of the 1980s, China consumes about 800000 ~ 1million tons of grinding balls every year, and the annual consumption of mill liners in China is nearly 200000 tons, most of which are steel products. The middle trough of scraper conveyors used in coal mines in China consumes 60000 to 80000 tons of steel plates every year

editor's summary: This is the introduction of the types of wear-resistant steel and the use methods of wear-resistant steel. I hope it will be helpful to you. If you want to know more about it, you can pay attention to the information

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