Method for performing Yt-based heavy rare earth modification on high manganese steel

Abstract

A method for carrying out illinium group heavy rare earths modification to timang is disclosed, the invention relates to a process for using the rare earths modification to improve the organization of timang and enhance the mechanics performances, belonging to the technical field of metal material modification, comprising the steps of: firstly, melting the waste steel, adding ferromanganese, after furnace materials are completely melted, adding fluorite and calces to remove clinker, then inserting pure aluminum to remove oxygen, then filling into a ladle comprising the heavy rare earths at the temperature ranging from 1410-1460 DEG C, casting after poise, eventually, performing water toughening to the cast. As the addition of illinium group rare earth, nucleation core is increased and austenite grain growth is prohibited, the austenite grain is thinned and has improved tensile strength and impact toughness. The method of the invention efficiently solves the issue about severe initial abrasion of the timang, thus greatly improving the service life and increasing the ratio of performance to price.

Description

technical field [0001] The invention relates to a process for improving the structure and mechanical properties of high-manganese steel by adopting rare earth modification treatment on high-manganese steel, and belongs to the technical field of metal material modification. Background technique [0002] As a traditional wear-resistant material, high-manganese steel is unmatched by other materials in terms of resisting abrasive wear or chisel wear under the action of strong impact and high pressure. The as-cast structure of high-manganese steel is austenite, carbide and a small amount of pearlite. After water toughening treatment, all or most of the carbide is dissolved in austenite to obtain single-phase austenite or austenite with a small amount of austenite. Carbide structure, so it has good plasticity and toughness. Under the action of a large impact load or contact stress, the surface layer rapidly produces work hardening and forms martensite and ε phase to slip along th...

AI Technical Summary

Problems solved by technology

Due to the low yield strength of high manganese steel, it is easy to deform when it is first used, which will cause greater wear

[0003] In recent years, some studies have been carried out on improving the structure and performance of high manganese steel by using rare earth modification, but they are all focused on the modification of light rare earth. For expensive wire feeding equipment, many manufacturers tend to choose alloying elements as substitutes after comprehensively considering the cost performance, resulting in the fact that rare earth metamorphic high manganese steel has not been well promoted in actual production

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