Preparing method of lightweight high manganese steel material

Abstract

The invention relates to the field of high manganese steel, in particular to a preparing method of a lightweight high manganese steel material and the lightweight high manganese steel material is capable of being used in the wear-resisting fields of mine, building materials, railways and the like which bearing impulse loads, such as a ball mill liner, a crusher hammer head and a railway turnout. According to the lightweight high manganese steel material adopting the preparing method, the moderate amount of Al element is added on the basis of traditional high manganese steel in order to decrease the density, the Al element in the lightweight high manganese steel material is added mainly in an Al-Fe alloy form, and the mechanical properties of castings are improved by optimizing smelting andpouring technologies. The density of the lightweight high manganese steel material adopting the preparing method is 7.10-7.65 g / cm3, and the density is decreased by 1.7-8.5% compared with the densityof traditional high manganese steel. In addition, the steel grade of the lightweight high manganese steel material also has excellent toughness and plasticity, and the wear resistance is increased bymore than 30% compared with the wear resistance of the traditional manganese steel, the density is low, the cost is low, and the abrasion resistance is excellent.

Description

technical field [0001] The invention relates to the field of high manganese steel, in particular to a method for preparing a lightweight high manganese steel material, which can be used in wear-resistant fields such as mines, building materials, and railways that bear impact loads, such as: ball mill liners, crusher hammers and Railway turnout etc. Background technique [0002] As the earliest wear-resistant material, high manganese steel has been researched and used for nearly a hundred years. It is widely used in metallurgy, mining, building materials, railways, electric power, coal and other mechanical equipment that are subjected to impact loads all year round. However, with the complex working conditions of high manganese steel castings and the continuous increase in the operating speed of mechanical equipment, high energy consumption, serious pollution, and severe impact wear in the working process lead to low life and mechanical efficiency, and it is difficult to achi...

AI Technical Summary

Problems solved by technology

However, with the complex working conditions of high manganese steel castings and the continuous increase in the operating speed of mechanical equipment, high energy consumption, serious pollution, and severe impact wear in the working process lead to low life and mechanical efficiency, and it is difficult to achieve energy saving. Economic and environmental purposes

[0003] In recent years, there have been some patents on the research of light high manganese steel materials. Related patent applications such as: patent application publication number CN103643110A, which provides a light high manganese steel liner for ball mills and its preparation method. Although the density of the smelted high manganese steel lining is 9%-15% lower than that of the existing high manganese steel lining, and the wear resistance is increased by more than 35% compared with ordinary high manganese steel, but the smelted high manganese steel lining The microstructure is a ferrite-austenite dual phase microstructure, which will weaken the work hardening ability of the casting due to the ferrite microstructure, resulting in a decrease in the comprehensive wear resistance of the casting

[0004] Another example is the patent application publication number CN105154764A, which provides a light-weight high-manganese steel liner for crushers and a preparation method thereof. Although the density of the high-manganese steel liner smelted in the patent is reduced by 9.0% to 15.0%, Compared with ordinary high-manganese steel, the wear resistance has been improved by more than 40%. However, when used in some small and medium-sized crushers, due to the small impact load, the casting cannot fully exert its work hardening ability, which reduces the service life of the casting and increases the wear resistance of the casting. cost of production

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