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Preparation method for cold press forming of alloy additives for refining molten steel

A technology of cold pressing and adding materials, which is applied in the field of alloy manufacturing, can solve the problems of molten steel refining quality control, large density or specific gravity difference, and large loss of alloy raw materials, etc., to achieve good refining effect of molten steel, precise trace elements, Effect of production cost reduction

Inactive Publication Date: 2016-08-24
GONGYI ZHONGXIN CALCIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A cold press forming preparation method for alloy additives used in molten steel refining, comprising the following steps:

[0017] (1) Material preparation: select elemental raw materials calcium, magnesium, and aluminum according to the following gradation (mass ratio is 3:2:1), the powder with a particle size of 0-1mm accounts for 25wt%, and the powder with a particle size of 1-3mm accounts for 60wt% , 3 ~ 6mm powder accounted for 15wt%; among them, in the 0 ~ 1.0mm powder, the particle size of 0 ~ 0.3mm powder accounted for 80% of its total weight, 0.3 ~ 1.0mm powder accounted for 20%, Among the powders with a particle size of 1.0-3.0mm, the powder with a particle size of 1.0-2.0mm accounts for 70% of the total weight, and the powder with a particle size of 2.0-3.0mm accounts for 30%. Filling with medium particles, the voids of medium particles are just filled with fine particles, such step-by-step filling makes the mixed alloy material form the densest packing stat...

Embodiment 2

[0021] A cold press forming preparation method for alloy additives used in molten steel refining, comprising the following steps:

[0022] (1) Material preparation: Select the required elemental raw materials magnesium and silicon (3:1) according to the following gradation, the powder with a particle size of 0-1mm accounts for 10wt%, the powder with a particle size of 1-3mm accounts for 70wt%, and the powder with a particle size of 3-6mm The material accounts for 20wt %; among them, among the powder materials of 0-1.0mm, the powder materials with a particle size of 0-0.3mm account for 70% of the total weight, the powder materials of 0.3-1.0mm account for 30%, and the powder materials of 1.0-3.0mm In the powder, the powder with a particle size of 1.0-2.0mm accounts for 60% of its total weight, and the powder with a particle size of 2.0-3.0mm accounts for 40%. The gaps are just filled with fine particles, so that the step-by-step filling makes the mixed alloy material form the d...

Embodiment 3

[0026] A cold press forming preparation method for alloy additives used in molten steel refining, comprising the following steps:

[0027] (1) Material preparation: Select the required elemental raw materials aluminum and silicon (4:1) according to the following gradation. The material accounted for 5wt%; Among them, among the powder materials with a particle size of 0-1.0mm, the powder materials with a particle size of 0-0.3mm accounted for 90% of the total weight, the powder materials with a particle size of 0.3-1.0mm accounted for 10%, and the powder materials with a particle size of 1.0-3.0mm In the powder, the powder with a particle size of 1.0-2.0mm accounts for 80% of the total weight, and the powder with a particle size of 2.0-3.0mm accounts for 20%. The gaps are just filled with fine particles, so that the step-by-step filling makes the mixed alloy material form the densest packing state, the void ratio reaches the minimum value, and the packing density reaches the ma...

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PUM

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Abstract

The present invention involves a cold pressure forming method for refining alloy adding alloys, including the following steps: (1) Select or prepare a single -quality raw material with a granularity of 0 to 1mm.~ 3mm powder accounts for 50-70WT%, 3 to 6mm of powder account for 5 to 20WT%; (2) Stir: Add each raw material to a horizontal lying blender, stir with 60 to 100 rpm / min for 3 to 10min, fully sufficientStir well; (3) Pressure molding: Add the mixed raw material to the hydraulic molding mold, and gradually pressure to 1500 ~ 2000MPa within 10 to 15 seconds at the normal temperature conditions.The method of the present invention does not introduce any impurities. The chemical composition is unchanged and distributed uniform, the qualification rate is high, the process is simplified, the energy saving, the cost of similar products is about 30%.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00
Inventor 张明乾李显业张仲伟张建秋
Owner GONGYI ZHONGXIN CALCIUM
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