Preparation method of nano A12O3 granule

Abstract

A preparation method of a nano A12O3 granule includes the following steps: (1) adding Fe-Al alloy wires, and (2) solidifying alloy. According to the preparation method, purity and combined strength of produced metal are high, a crystal structure is compact, and the technical process is stable and easy to control. The preparation method has the advantages that a nano A12O3 dispersed phase can be directly formed in the solidified alloy, and the fact that strength of the alloy is improved on the condition that plasticity and toughness of the alloy remain basically unchanged is benefited. The purity and the combined strength of the produced metal are high, the crystal structure is compact, and the technical process is stable and easy to control.

Description

technical field [0001] The invention relates to the field of iron and steel materials, in particular to a preparation method for forming nanometer Al2O3 particles in molten steel. Background technique [0002] The traditional method for removing the oxide layer on the surface of nickel-chromium alloys is generally to use strong acidic chemicals such as hydrofluoric acid, sulfuric acid, hydrochloric acid, nitric acid, etc. Put the wire into it for corrosion for a period of time, then lift it up and rinse it with clean water to dry. This method of removing the oxide layer on the surface of the alloy by pickling has the characteristics of a small one-time investment, but at the same time it is difficult to accurately grasp the erosion thickness when cleaning the wire, the loss of the wire is large, the cleaning speed is slow, the efficiency is low, and the removal uniformity is poor. The acid mist floats on the human body and has the disadvantages of neutralizing and processin...

AI Technical Summary

Problems solved by technology

This method of removing the oxide layer on the surface of the alloy by pickling has the characteristics of a small one-time investment, but at the same time it is difficult to accurately grasp the erosion thickness when cleaning the wire, the loss of the wire is large, the cleaning speed is slow, the efficiency is low, and the removal uniformity is poor. The acid mist floating has the disadvantages of harming the human body and the need to neutralize and deal with more pickling waste liquid

In addition, if the acid waste liquid is not treated and poured directly into the sewer, it will cause difficult-to-remove pollution to the surrounding environment.

Therefore, the pickling method to remove the oxide layer on the surface of nickel-chromium wire belongs to the backward non-environmental protection traditional process, which needs to be improved.