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Low calcium-aluminum-manganese-iron alloy and preparation method thereof

A technology of manganese-ferroalloy and calcium-aluminum, which is applied in the field of low-calcium-aluminum-manganese-ferroalloy and its preparation. It can solve the problems of easy pulverization of aluminum-iron alloy and aluminum-manganese alloy, affecting the mechanical properties of steel castings, affecting economic benefits, etc., and achieves low cost. , high hit rate, good effect

Inactive Publication Date: 2013-01-23
包头市北科创业高新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Metal aluminum is a strong deoxidizer. Aluminum has a strong affinity with oxygen. In steelmaking, it can deoxidize and fix nitrogen, refine grains, inhibit the aging of low-carbon steel, and improve the low-temperature toughness of steel. It is widely used as The final deoxidizer, but aluminum has the following disadvantages as a deoxidizer: (1) the specific gravity of aluminum is relatively light. When it is added to molten steel, under the action of air and steel slag, nearly 70% to 90% of aluminum is oxidized. lower; (2)Al 2 o 3 It is the main oxide inclusion, and this hard and brittle inclusion seriously affects the mechanical properties of steel castings; (3) Al 2 o 3 (4) The higher price of aluminum increases the cost of steelmaking and affects economic benefits
[0004] At present, aluminum-iron alloys and aluminum-manganese alloys used as composite deoxidizers are prone to pulverization, especially in high temperature and humid seasons, they will be pulverized within a few days, making it difficult to store

Method used

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  • Low calcium-aluminum-manganese-iron alloy and preparation method thereof
  • Low calcium-aluminum-manganese-iron alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add aluminum ingots and metal calcium into an induction furnace at a ratio of 86%: 14%, heat for 40 minutes, keep the temperature at 840° C., pour them out of the furnace into a mold to cast into blocks, and naturally cool to form a high-alumina-calcium alloy.

[0024] (2) 50% of angle iron: 8% of medium carbon ferromanganese is added to the induction furnace and heated for 35 minutes. The temperature is maintained at 1600 ° C. Add 40% of the prepared high-aluminum calcium alloy for smelting for 20 minutes. Turn off the power and add 2% The aluminum ingots are naturally cooled to 1100°C and poured into a mold to be cast into a block, and naturally cooled to make a low-calcium aluminum-manganese-ferroalloy.

[0025] The chemical composition of the obtained low-calcium Al-Mn-Fe alloy: (all are weight percent):

[0026]

[0027] The balance is Fe.

Embodiment 2

[0029] (1) The ratio of 90% aluminum ingot: 10% calcium metal is added to the induction furnace and heated for 40 minutes, the temperature is maintained at 850° C., the furnace is poured into a mold to cast into a block, and naturally cooled to form a high-alumina-calcium alloy.

[0030] (2) Angle iron 10%: the ratio of medium carbon ferromanganese 9% is added to the induction furnace and heated for 35 minutes, the temperature is maintained at 1580 ° C, and 78% of the obtained high-alumina-calcium alloy is added for smelting for 18 minutes, the power is turned off, and 3% is added The aluminum ingots are naturally cooled to 1060°C, poured into a mold and cast into blocks, and naturally cooled to make a low-calcium aluminum-manganese-ferroalloy.

[0031] The chemical composition of the obtained low-calcium Al-Mn-Fe alloy: (all are weight percent):

[0032]

[0033] The balance is Fe.

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Abstract

The invention discloses a low calcium-aluminum-manganese-iron alloy and a preparation method thereof, and belongs to the technical field of steel-making deoxidizing agents. The alloy comprises the following components in percentage by weight: 30 to 70 percent of Al, 2 to 30 percent of Mn, 1 to 10 percent of Ca, not more than 4 percent of other residual elements, and the balance of Fe, wherein theother residual elements refer to carbon, sulfur, phosphorus elements interfused in the process of alloy melting. The preparation method comprises the following process steps of: material selection and preparation, material loading, melting, slag removal, casting, weighing and finished product warehousing. The low calcium-aluminum-manganese-iron alloy has the following advantages that: a strong deoxidizing effect is realized, the yield of functional elements is high, the foreign impurity particles generated in molten steel are large and are easy to remove; besides, the low calcium-aluminum-manganese-iron alloy is a strong deoxidizing agent, an alloy additive, and can be used as an intermediate alloy.

Description

technical field [0001] The invention belongs to the technical field of steelmaking deoxidizers, and in particular provides a low-calcium-aluminum-manganese-ferroalloy and a preparation method thereof. Background technique [0002] As we all know, the solubility of oxygen in solid iron is very small, and eventually form oxide inclusions, which will reduce the mechanical properties of steel, especially the fatigue strength and impact toughness of steel, which is detrimental to the machinability and welding performance of steel. The various steelmaking composite deoxidizers currently used are basically composite iron alloys containing silicon. Therefore, it can only be used for the final deoxidation of killed steel. The deoxidation of boiling steel still uses aluminum cakes, aluminum rings, etc. made of aluminum as deoxidizers. Metal aluminum is a strong deoxidizer. Aluminum has a strong affinity with oxygen. In steelmaking, it can deoxidize and fix nitrogen, refine grains, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C38/06C22C1/02C22C33/04C21C7/06
CPCY02P10/20
Inventor 陈向明曲俊涛成国光杨晓红张向红
Owner 包头市北科创业高新材料有限责任公司
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