Bushing, preparation method and device of bushing

Abstract

The invention provides a bushing, which is made of austenitic manganese steel as a base material into a cylindrical body, and a nano-modifying agent is uniformly dispersed in the base material, and the nano-material includes silicon nitride, titanium nitride, nitrogen At least one of aluminum oxide, silicon carbide, titanium carbide, boron carbide, zirconium carbide, silicon boride, zirconium boride and rare earth oxides, the content of the nano-modifier accounts for 0.01%-0.30% of the total weight of the bushing. The invention also provides a bushing preparation method and a bushing preparation device. By injecting nanomaterials into the liquid high manganese steel twice, the crystal grains are refined, and the metallographic structure of the high manganese steel and the mechanical properties of the bushing are greatly improved. By adding nano-materials, the grains of the metal structure are extremely refined, the molten steel is pure, the mechanical performance index is improved, and the wear resistance is better, so as to achieve the purpose of optimization modification.

Description

technical field [0001] The invention relates to the field of manufacture of wear-resistant parts, in particular to the field of wear-resistant bushings. Background technique [0002] Bushing is a commonly used wear-resistant mechanical part, which needs to withstand strong wear and impact during work, and has a limited service life. In order to effectively improve the working life of the bushing, the appropriate material and processing method should be selected according to its working conditions. The use of austenitic manganese steel can take advantage of the impact during work and give full play to the impact hardening effect of austenitic manganese steel. However, the cooling process of liquid austenitic manganese steel belongs to the intermediate solidification mode, which is between layer-by-layer solidification and mushy solidification, so that the austenite grain size can only reach 0-2 grades, and the coarse grains cause high manganese steel. The mechanical propert...

AI Technical Summary

Problems solved by technology

However, the cooling process of liquid austenitic manganese steel belongs to the intermediate solidification mode, which is between layer-by-layer solidification and mushy solidification, so that the austenite grain size can only reach 0-2 grades, and the coarse grains cause high manganese steel. The mechanical properties are not high enough

Moreover, due to the complex composition of high manganese steel raw materials and high impurity content, defects such as pores and inclusions are easily formed during the smelting process, thus affecting the performance of high manganese steel.

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