Lightweight high manganese steel liner for ball mill and preparation method thereof

Abstract

The invention relates to a light-weight high manganese steel liner plate used in ball mills in fields such as mines, cement, electric power and the like and a preparation method thereof. Including steps: (1) The raw material is smelted in an intermediate frequency induction furnace, Al is added when the temperature reaches 1500°C~1650°C, and the steel is tapped at 1530°C~1580°C; (2) Cast into the metal mold cavity at 1400°C~1450°C; (3) Heating rate from normal temperature to 600°C~650°C is 30~40°C / h, keep warm for 6h; then increase the heating rate to 120~140°C / h, until the water quenching temperature is 1080°C~1100°C, keep hold for 4h ;Using water quenching, the water temperature is controlled at 15°C~30°C, and the water temperature at the end of quenching is <50°C. The invention reduces the density by adding an appropriate amount of Al and Mn, and improves the mechanical properties by optimizing the smelting and pouring process; the density of the smelted high manganese steel lining is 6.60~7.10g / cm3, which is higher than that of the existing high manganese steel lining The board density is reduced by 9%~15%, and the wear resistance can be increased by more than 35% compared with ordinary high manganese steel. Compared with the liner produced by the existing method, the present invention has equivalent performance, but obviously reduces the density and production cost of the liner.

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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