Microstructure and properties evolution of HB450 low-alloy ultra-high-strength wear-resistant steel during tempering

With the rapid development of automobiles and other industries, the requirements for wear-resistant steel are also increasing. In order to meet the needs of working environment, high wear resistance and sufficient strength are usually required for wear-resistant steel. HB450 Alloy Steel is an ultra-high strength wear-resistant steel, which has been widely used in automotive, aerospace and other fields due to its excellent mechanical properties.
    
When the HB450 Alloy Steel is used in the working environment, it is necessary to temper the steel in order to obtain the appropriate strength while maintaining the wear resistance of the material. The microstructure and properties of HB450 Alloy Steel during tempering have been studied in many experiments.
    
In the tempering process of the HB450 Alloy Steel, the first thing that happens is the precipitation of pearlite. During tempering at 800°C, the pearlite quickly forms and is easily observed under a microscope. At the same time, the white-banded tempered martensite begins to transform into aspect globular ferrite and acicular ferrite-carbide primary structure. With the continued tempering of HB450 Alloy Steel at 800°C, more ferrite and carbide are precipitated. At the same time, the pearlite gradually becomes coarser and easier to observe under the microscope.
    
Microstructure evolution of HB450 Alloy Steel during Tempering at 800°C
    
Moreover, the tempering of HB450 Alloy Steel at 800°C also helps improve the mechanical properties of the material. The hardness of HB450 Alloy Steel increases steadily during tempering, and the yield strength and tensile strength of the material also increases. When the tempering is over, the material can reach a high strength as well as wear resistance, which gives it excellent performance in the working environment.
    
Properties Evolution of HB450 Alloy Steel during Tempering at 800°C
    
To conclude, the microstructure and properties of HB450 Alloy Steel can be improved to a certain extent through tempering at 800°C. This kind of treatment helps the steel to reach a high strength as well as wear resistance, which makes it suitable for many environment applications.

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