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AlCaSi composite deoxidizer

The technology of compound deoxidizer and deoxidizer is applied in the field of steel smelting and manufacturing, which can solve the problems of affecting the mechanical properties of steel and shortening the service life of steel, and achieve the effects of fast reaction speed, cost saving and time shortening.

Inactive Publication Date: 2020-04-17
吉林常春高氮合金研发中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an AlCaSi composite deoxidizer to solve the technical problems that the existing Al-based composite deoxidizer is easy to shorten the service life of steel and affect the mechanical properties of steel

Method used

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Embodiment 1

[0018] An AlCaSi composite deoxidizer, the deoxidizer includes the following raw materials in mass fraction: 15-25% of aluminum powder, 8-12% of CaO, 2-5% of boron carbide, 5-8% of boron phosphide , 20-25% silicon dioxide, and the balance being ferrous sulfide; the CaO is granular, and aluminum powder is wrapped inside each granular CaO.

Embodiment 2

[0020] A preparation method of AlCaSi composite deoxidizer, specifically comprising the following steps:

[0021] Step S1, mix 120g CaO and 100g water evenly, and stir into a paste;

[0022] Step S2, add 180g of aluminum powder into part (about half) of the pasty CaO, stir and mix evenly to form a spherical particle structure, then dry the spherical particles, and then put them in the remaining pasty CaO to make the CaO Wrapped on spherical particles;

[0023] Step S3, 40g process boron carbide, 70g boron phosphide, 200g silicon dioxide, and 490g ferrous sulfide into granules, and mix them with the granules prepared in step S2.

Embodiment 3

[0025] A preparation method of AlCaSi composite deoxidizer, specifically comprising the following steps:

[0026] Step S1, mix 80g CaO and 60g water evenly, and stir into a paste;

[0027] Step S2, add 150g of aluminum powder into part (about half) of the pasty CaO, stir and mix evenly to form a spherical particle structure, then dry the spherical particles, and then put them in the remaining pasty CaO to make the CaO Wrapped on spherical particles;

[0028] In step S3, 50g of boron carbide, 80g of boron phosphide, 250g of silicon dioxide, and 390g of ferrous sulfide are processed into granules, which are then mixed with the granules prepared in step S2.

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PUM

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Abstract

The invention relates to an AlCaSi composite deoxidizer. The deoxidizer comprises the raw materials in percentage by mass: 15-25% of aluminum powder, 8-12% of CaO, 2-5% of boron carbide, 5-8% of boronphosphide, 20-25% of silicon dioxide and the balance of ferrous sulfide; and the CaO is granular, and the aluminum powder is wrapped inside each CaO granule. The deoxidizer has a good deoxidizing effect, slag changing is quick, the addition amount of the aluminum powder can be greatly reduced due to the addition of boride, and the situation that deoxidation product aluminum oxide is too much so as to affect the mechanical properties of steel is avoided.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting and manufacturing, and relates to a deoxidizer for smelting, in particular to a [0002] AlCaSi composite deoxidizer. Background technique [0003] The harmfulness of oxygen in steel is mainly manifested in the following three aspects. (1) Inclusions: When molten steel solidifies, the excess oxygen combines with other elements in the steel to form non-metallic inclusions, which destroys the continuity of the steel matrix and reduces the strength limit, impact toughness, elongation, etc. of the steel. Various mechanical properties, magnetic properties, welding properties, etc. (2) Bubble formation: The oxygen content in molten steel is too high, and it will react with carbon in the steel again during the casting process to generate CO gas, which will cause defects such as pores, looseness, and even rise in the steel ingot (billet). It will cause the steel ingot (billet) to be scrapped. ...

Claims

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Application Information

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IPC IPC(8): C21C7/06
CPCC21C7/06
Inventor 陈咨伟
Owner 吉林常春高氮合金研发中心有限公司
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