Preparation Process And Microstructure And Properties Of Ultra-high Manganese Steel Wear-resistant Lining

Ball mill as an important equipment in the production of mineral processing, its work efficiency directly affect the economic benefits. The liner as a ball mill abrasive wear in the important spare parts which directly affect the operation of the ball mill.Therefore,the wear resistance of the liner plays a decisive role in the production efficiency. But the liner is easy to wear in the ball mill, the amount of replacement and consumption of the largest spare parts, the cost of wearing parts, the cost of more than 60%.Increasing the service life of the ball mill liner becomes an important means of reducing costs, producing energy consumption and improving economic efficiency. In this paper, we first use the addition of alloying elements to explore the effect of alloying elements on the properties of high manganese steel, Secondly, the effect of temperature on the properties of high manganese steel was investigated. Finally, the effects of tempering temperature and holding time on the mechanical properties of high manganese steel were investigated by different tempering temperature and holding time. The results are as follows:(1) After the composition is changed,which the number of grains in the same area is more than that of the original. And the fine grain strengthening results in a certain increase in hardness and tensile properties. Therefore, the amount of friction and wear decreases.(2) Without the tempering treatment, 105?water toughness after the comprehensive performance than the 1080? water toughness of the comprehensive performance is poor; After 350?, 400?and 450?for 6 h, the results show that the comprehensive performance matching at 1050?and 1080?after 6?tempering treatment is very good, but at 1080?The tensile strength was significantly higher.(3) After the water was treated, the number of grains in the same area increased and the number of precipitates decreased with the increase of tempering temperature.Precipitated white precipitates containing Si and O at 450?,which 1050?water toughness at 400?tempering when the grain is relatively more uniform;1080?water toughness at 450?tempering when the largest number of grains.(4) After the water treatment at 1080?, the number of grains after tempering at 300?and 350?in the same area was more than 400?.But the grain size distribution after 350? tempering treatment is more uniform, and the number of precipitates increases with the increase of tempering temperature.(5) 1080?water toughness treatment, in the tempering treatment when the insulation 4h, with the tempering temperature increases, the precipitation of carbide elements and elements of the proportion of different. Water corrosion treatment is not the tempering of the main Cr element of the carbide, in the 300?tempering treatment is mainly V, Cr carbide elements, at 350?for the Ti, Cr elements of the carbide, and Ti The proportion of relatively large,at 400?,mainly V,Cr elements of the carbide.After the water treatment at 1080 ?, the mechanical properties can be found in the tempering treatment at 350 ?, but there is no better than the heat preservation at 400 ? for 6h. Good overall performance. In the industrial test, the test results are better than the optimization, and the performance has reached the performance requirements of the mine.