Development and Application of Medium Chromium Alloy Wear-resistant Steel

Medium chromium alloy wear-resistant steel is a kind of superior wear-resistant alloy steel which specially adapts to medium, heavy and other severe wear conditions under large particle impact and high temperature. It is composed of carbide, which is featured by strong hardness, excellent abrasion resistance, good impact toughness and strong plasticity, etc. Meanwhile, alloy elements such as chromium, molybdenum and copper can make up some of the shortcomings of carbon steel and enhance its wear resistance and hardness.
    
Structure of Medium Chromium Alloy Wear-resistant Steel
    
Medium chromium alloy wear-resistant steel is generally composed of medium carbon austenite matrix, chromium carbide, molybdenum, nickel and other alloy elements precipitation, and then quenching and tempering heat treatment. The martensite and residual austenite are the main matrix of this material, as shown in figure 1. The hard chromium carbides, also known as secondary carbides, are distributed in the martensite matrix and form a good composite. The hardness of the matrix is generally 350–500 HV, and the content of chromium is 13–25%.
    
The excellent performance of medium chromium alloy wear-resistant steel makes it widely used in many industrial fields such as mining, machinery, etc. First of all, compared with other medium and low alloy steel, it has the advantages of wear resistance, impact toughness and fatigue resistance. In addition, medium chromium alloy wear-resistant steel has good heat resistance, oxidation resistance and corrosion resistance. Moreover, due to its excellent wear resistance, medium chromium alloy wear-resistant steel is widely used in conveyor systems, hoisting machines, steel mines and other wear-borne parts.
    
Application of Medium Chromium Alloy Wear-resistant Steel
    
The main application of medium chromium alloy wear-resistant steel is in the manufacturing of wear-resistant parts, as shown in figure 2. Medium chromium alloy wear-resistant steel can be machined into various shapes or components, such as sheet, sheet, pipe, bar and other shapes. Moreover, these parts can be machined according to different requirements and equipped with different shapes, configurations and sizes. In addition, medium chromium alloy wear-resistant steel has good welding properties, and it can be easily welded and formed.
    
In summary, medium chromium alloy wear-resistant steel has excellent wear resistance and impact toughness, and it is widely used in the manufacturing of wear-resistant parts. It can be machined into various shapes and made into components. Moreover, it has good welding properties and can be welded easily. Medium chromium alloy wear-resistant steel is an important material in the field of wear resistance.

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