Lightweight high-manganese steel liner plate for ball mill and manufacturing method of liner plate

Abstract

The invention relates to a lightweight high-manganese steel liner plate for a ball mill for use in the fields such as mine, cement and power, and a manufacturing method of the liner plate. The manufacturing method comprises the steps: (1) smelting the raw materials in a medium-frequency induction furnace, adding Al at a temperature ranging from 1500 DEG C to 1650 DEG C, and tapping the molten steel at a temperature ranging from 1530 to 1580 DEG C; (2) pouring the molten steel into a cavity of a metal mold at a temperature ranging from 1400 DEG C to 1450 DEG C; (3) heating to 600 to 650 DEG C from the normal temperature at a heating rate ranging from 30 DEG C / h to 40 DEG C / h, and preserving heat for 6 hours; next, increasing the heating rate to the range from 120 DEG C / h to 140 DEG C / h until the temperature reaches a water quenching temperature in the range from 1080 DEG C to 1100 DEG C, and preserving heat for 4 hours; and carrying out water quenching, controlling the water temperature in the range from 15 DEG C to 30 DEG C, and controlling the water temperature to be below 50 DEG C when quenching is finished. According to the invention, the density of the lightweight high-manganese steel liner plate is reduced by adding Al and Mn properly, and the mechanical properties of the lightweight high-manganese steel liner plate are improved by optimizing the smelting and casting processes; the density of the obtained high-manganese steel liner plate ranges from 6.60g / cm<3>to 7.10g / cm<3>, and is reduced by 9%-15% in contrast with that of an existing high-manganese steel liner plate; the abrasion resistance of the high-manganese steel liner plate can be improved by more than 35% in contrast with that of a common high-manganese steel liner plate. Compared with the liner plate produced by an existing method, the light high-manganese steel liner plate has comparative properties; however, the density and the production cost of the liner plate are obviously reduced.

Description

technical field [0001] The invention relates to a light-weight high manganese steel liner plate used in ball mills in the fields of mines, cement, electric power and the like and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] With the continuous expansion of the production scale of enterprises and the reduction of ore grades, the production capacity of ball mills is getting larger and larger, and my country is gradually moving towards the direction of large-scale ball mills; however, the world's energy is becoming increasingly scarce, resulting in rising fuel prices, saving energy consumption. become the consensus of all countries in the world. Energy consumption and steel consumption in the process of crushing materials have become the focus of investigation and research in many countries. Traditional liner materials are generally made of high manganese steel, and the annual consumption of high manganese stee...

AI Technical Summary

Problems solved by technology

In recent years, some ultra-high manganese ball mill liners have appeared, such as the patent of publication number CN102433508A, which provides a kind of ultra-high manganese ball mill liner and its preparation method; although its wear resistance is 30% higher than that of ordinary high manganese steel, but When used in a large ball mill, due to the heavy weight of the liner, the energy consumption is increased, resulting in a less obvious overall effect of the increased wear resistance; and patent No. CN1080327 discloses a wear-resistant liner for a low-alloy ball mill and its manufacturing process. The invention is expensive to produce due to the addition of expensive molybdenum and copper

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