High temperature deformation behavior of NM360 wear-resistant steel

    
    NM360 wear-resistant steel is a high performance, low alloy wear-resistant steel with a carbon content of 0.30 to 0.40%. This steel has excellent wear resistance and a good balance of toughness and ductility. It is widely used in a variety of applications because of its excellent wearability, good tensile strength, and low costs. The material has a low hardening rate, which allows it to be used in fabrication applications that require a high degree of toughness and ductility.
    
    High temperature deformation behavior is the key to understanding the mechanical properties of a material. In general, the higher the temperature, the lower the yield stress of the material and the more plastic deformation occurs. The response of NM360 wear-resistant steel to high temperature deformation is strongly dependent on its microstructure. Due to its low hardening rate, the amount of dynamic strain aging and grain growth are very small in comparison to other steels, resulting in a relatively low yield stress at high temperatures. This property allows NM360 wear-resistant steel to withstand high loads at moderate temperatures without significant strain hardening.
    
    At elevated temperatures, the material undergoes a shift in response to deformation that is characterized by strain softening. This occurs because the mobility of dislocations at elevated temperatures increases, resulting in a decrease in the yield strength and an increase in plastic deformation. However, if the temperature is beyond the strain softening point, the material will start to harden and there will be a decrease in plastic deformation.
    
    Figure 1 shows the effect of temperature on the deformation behavior of NM360 wear-resistant steel. As the temperature increases, the yield strength decreases due to changes in the microstructure. This results in a decrease in yield strain and an increase in plastic deformation. The strain hardening rate increases slightly above the strain softening point, and then decreases again as the temperature reaches high values.
    
    As temperatures increase, the creep resistance of most materials decreases significantly. Figure 2 shows the creep behavior of NM360 wear-resistant steel at different temperatures. As seen in the graph, the creep strength decreases significantly with increasing temperature. The material also experiences accelerated creep at temperatures above 600°C.
    
    High temperature deformation of NM360 wear-resistant steel is strongly dependent on its microstructure. Due to its low hardening rate, the material has low yield stress at moderate temperatures and it experiences strain softening rather than strain hardening when subjected to high temperatures. The material has good creep resistance up to 500°C, but its strength is greatly reduced above 600°C. These properties make NM360 wear-resistant steel well-suited for applications that involve elevated temperatures and/or high wear environment.

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