Cold press molding preparation method of alloy addition material used for molten steel refining

Abstract

The invention relates to a cold press molding preparation method of an alloy addition material used for molten steel refining. The cold press molding preparation method comprises the following steps: (1) selecting or preparing simple substance raw materials, wherein powder with the particle size of 0-1mm accounts for 10-30wt%, powder with the particle size of 1-3mm accounts for 50-70wt%, and powder with the particle size of 3-6mm accounts for 5-20wt%; (2) stirring, namely, adding raw materials to a transverse horizontal stirring machine, stirring for 3-10min with 60-100revolution / min, and sufficiently and uniformly stirring; (3) carrying out pressure molding, namely, adding uniformly mixed raw materials to a hydraulic molding mould, gradually pressuring to 1500-2000MPa under the condition of normal temperature, relieving pressure and molding to obtain the alloy addition material. By utilizing the cold press molding preparation method, any impurities are not introduced, chemical component is not changed, distribution is uniform, percent of pass is high, process is simplified, energy is saved, and cost is reduced by about 30% as compared with the similar product.

Description

technical field [0001] The invention belongs to the technical field of alloy manufacture, and in particular relates to a method for preparing alloy additives by cold pressing for refining molten steel. Background technique [0002] Alloy additives used in the refining process of molten steel are solid alloy materials made of two or more metals or nonmetals (such as commonly used calcium, magnesium, aluminum, silicon, etc.) through a certain method. , generally obtained by melting and solidifying a homogeneous liquid. Due to the high requirements for precise control of components in the molten steel refining process, extremely high requirements are placed on the uniformity of component dispersion of additives; however, due to different types of alloy raw materials (such as commonly used calcium, magnesium, aluminum, silicon, etc. ) has a large difference in density or specific gravity, and the melting preparation method often has uneven dispersion of raw materials, such as s...

AI Technical Summary

Problems solved by technology

Due to the high requirements for precise control of components in the molten steel refining process, extremely high requirements are placed on the uniformity of component dispersion of additives; however, due to different types of alloy raw materials (such as commonly used calcium, magnesium, aluminum, silicon, etc. ) has a large difference in density or specific gravity, and the melting preparation method often has uneven dispersion of raw materials, such as sinking of heavy components and floating of light components (such as magnesium, etc.), which is extremely difficult to control. , secondary remelting of waste materials, forming and other steps, not only high energy consumption, but also high scrap rate and large loss of alloy raw materials

The above technical problems have not been solved for a long time, which has caused great trouble to the quality control of molten steel refining