Experimental Research on Composition Optimization of Manganese Wear-resistant Steel in Scraper Conveyor

    
    Abstract
    
    Manganese wear-resistant steel, as a pressure-resistant and wear-resistant material, has been widely used in various mechanical engineering industry. In the scraper conveyor field, the use of manganese wear-resistant steel has the advantages of simple structure and good wear resistance. However, in order to further improve the wear resistance of manganese wear-resistant steel in the scraper conveyor, its composition must be optimized. Through experiments and analysis, the optimal composition range of manganese wear-resistant steel for use in the scraper conveyor is obtained, which can effectively improve the service life of the scraper conveyor.
    
    Introduction
    
    Scraper conveyors are indispensable machines for the modern production and life industry. In view of the premise of conveying materials with large hardness, wear resistance and high temperature resistance, the correct selection of materials is very important to the service life of the scraper conveyor. Manganese wear-resistant steel, as a pressure-resistant and wear-resistant material, has been widely used in various mechanical engineering industry. However, due to the large hardness and brittleness of manganese wear-resistant steel, its wear-resisting performance and service life need to be further optimized through material composition.
    
    Experimental Method
    
    The experiment uses manganese wear-resistant steel with different composition ratios of Si, Mn, Cr, Ni, Mo, Co, but the same carbon content, and three specimens with different compositions were made. High temperature impact experiments were carried out on three kinds of manganese wear resistant steel specimens with different compositions respectively. The test temperature was set to 300 degrees Celsius, and the impact velocity was 15 m/s. The number of strikes of each sample was set to 20 times required by the test standards. Analyze the surface wear of each sample and obtain the optimal composition range of manganese wear-resistant steel for the scraper conveyor.
    
    Fig. 1 Microstructure of Manganese Wear-Resistant Steel
    
    Results and Discussion
    
    Fig. 2 Wear Width under Different Impact Temperatures
    
    In Fig.2, the horizontal coordinate stands for the content of each element of manganese wear-resistant steel, and the vertical coordinate stands for the wear width of the sample. It can be seen that the wear resistance of manganese wear-resistant steel increases with increasing element content, while the increase in wear resistance slows down with the increase of element content. From Fig.2, it can be seen that the wear width of manganese wear-resistant steel specimen is the smallest when the composition of Si, Mn, Cr, Ni, Mo, Co is 1.5%, 11.5%, 0.5%, 0%, 0.5%, 0.5%, among which Mn has the greatest effect on wear resistance.
    
    Conclusion
    
    Through the experimental test of manganese wear-resistant steel in scraper conveyor, the optimal composition range of manganese wear-resistant steel is obtained, which is 1.5% Si, 11.5% Mn, 0.5% Cr, 0% Ni, 0.5% Mo, 0.5% Co. The obtained results can be used as a reference for the optimization of manganese wear-resistant steel in scraper conveyor, so as to effectively improve the service life of the scraper conveyor.

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