R&D and application of key technologies for high-strength, toughness and elongation wear-resistant steel NM600

    
    Introduction
    
    High-strength, toughness and elongation wear-resistant steel NM600 are widely used in extreme working conditions in large-scale engineering projects, such as bridges, tunnels, ports and high-rise buildings. It is widely used in plate, section steel and steel construction materials. Moreover, it can resist impacts and erosion better than other regular steel, and thus it has become one of the most popular materials in many large-scale projects.
    
    Research and Development
    
    With the increasing requirements of energy conservation and emissions reduction in the transportation industry, it is necessary to develop high-strength, toughness and elongation wear-resistant steel. In order to meet the market requirement of NM600, some key technologies with great application value to the raw materials, such as controlling the chemical composition and adjusting the hot-rolling process, need to be studied and developed.
    
    1. Chemical composition optimization. In order to improve the mechanical performance of steel, it is necessary to optimize the chemical composition of steel. The method of chemical composition optimization of high-strength wear-resistant steel is mainly to optimize alloy elements, such as alloy elements of molybdenum, manganese, chromium, vanadium and etc., which can improve the strength, toughness, hardness and wear-resistance of the steel.
    
    2. Modification and alloying. Alloying technology is another important method to improve the performance of steel. It is well known that alloying can improve the hardness and strength of steel without affecting the plasticity and toughness to a large extent. After modifying the hot-rolling process, the alloy elements can be transferred from the steel liquid to the surface layer of NM600 through the molten slag, so that the surface layer of steel can also possess improved performance.
    
    3. Hot rolling process. The hot rolling process is an important step for the production of steel. The key of hot rolling process is to control the proper austenitizing temperature, rolling temperature and cooling rate, so as to reduce the homogenization time and improve the performance of NM600 steel.
    
    Application
    
    NM600 is widely used in many engineering projects, such as bridges, tunnels, ports and high-rise buildings, where wear-resistant steel is needed. The most common application is to manufacture wear-resisting plates, which can resist flapping, wear, impact and erosion better than other regular steel.
    
    Conclusion
    
    The research and development of high-strength, toughness and elongation wear-resistant steel NM600 has achieved remarkable results. The product has met the requirements of high strength, toughness and elongation, and its application effect has been verified in many large-scale projects. Through optimizing and controlling the chemical composition and the hot-rolling process, the performance of NM600 has been improved to meet the market requirements.

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