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Aluminium alloy manganese additive containing boride

A manganese additive and aluminum alloy technology, which is applied in the field of aluminum alloy manganese additives and additives, can solve the problems of difficulty in controlling the particle size of manganese powder, small and high yield of manganese powder, etc., and achieve less Mn residue and no harmful gas The effect of small amount, good viscosity and surface tension

Inactive Publication Date: 2008-09-03
江西金达通新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The new manganese agent developed in this paper adopts the manganese powder prepared by pure Mn (≥99.5%). The influence of the particle size of the manganese powder on the yield is investigated, and it is found that the manganese powder with a slightly larger particle size has a large yield, slow melting and low yield. The contradiction between the small yield and fast melting of manganese powder with slightly smaller particle size
Therefore, it is a very difficult problem to control the particle size of manganese powder.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Alloy ADC12: Original Mn 0.4wt.%

[0014] Aluminum alloy manganese additive composition (mass percentage): 10% sodium chloride (NaCl), 10% potassium chloride (KCl), 2% sodium fluoroaluminate (NaCl) 3 AlF 6 ), 3% sodium borate (Na 2 B 4 o 7 ), 75% manganese chloride (MnCl 2 ).

[0015] Manganese additive preparation method: Put various raw materials into stainless steel containers respectively, then put the container into an oven, heat up to 200°C with the furnace, keep warm for 2 hours, then take out the materials for use. Each component was accurately weighed according to the formula, ball milled with a ball mill at a speed of 300 rpm for 2 hours, and then dried at 150° C. for 1 hour.

[0016] When in use, when aluminum or aluminum alloy is melted in the smelting furnace and kept warm for a period of time, 0.5% manganese additive is mixed with gas (N 2 or Ar) was sprayed into the melt, and the manganese additive was fully mixed in the entire molten pool. After t...

Embodiment 2

[0018] Alloy ADC12: Original Mn 0.4wt.%

[0019] Aluminum alloy manganese additive composition (mass percentage): 18% sodium chloride (NaCl), 18% potassium chloride (KCl), 8% sodium fluoroaluminate (NaCl) 3 AlF 6 ), 6% sodium borate (Na 2 B 4 o 7 ), 50% manganese chloride (MnCl 2 ).

[0020] Manganese additive preparation method: Put various raw materials into stainless steel containers respectively, then put the container into an oven, heat up to 180°C with the furnace, keep warm for 3 hours, then take out the materials for use. Each component was accurately weighed according to the formula, ball milled for 2 hours with a ball mill at a speed of 300 rpm, and then kept at 200° C. for 2 hours.

[0021] When in use, add 1% manganese additive according to the addition method of Example 1, and keep warm for 10 minutes after adding. The Mn content increased from 0.4% to 0.61%, and the Mn absorption rate was 96%.

Embodiment 3

[0023] Alloy ADC12: Original Mn 0.4wt.%

[0024] Aluminum alloy manganese additive composition (mass percentage): 25% sodium chloride (NaCl), 25% potassium chloride (KCl), 5% sodium fluoroaluminate (NaCl) 3 AlF 6 ), 5% sodium borate (Na 2 B 4 o 7 ), 40% manganese chloride (MnCl 2 ).

[0025] Manganese additive preparation method: Put various raw materials into stainless steel containers respectively, then put the container into an oven, heat up to 150°C with the furnace, keep warm for 3 hours, then take out the materials for use. Each component was accurately weighed according to the formula, ball milled for 1 hour with a ball mill at a speed of 300 rpm, and then kept at 200° C. for 2 hours.

[0026] When in use, add 1.5% manganese additive according to the addition method of Example 1, and keep warm for 5 minutes after adding. The Mn content increased from 0.4% to 0.58%, and the Mn absorption rate was 92%.

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Abstract

The invention discloses a boride-containing aluminum alloy Mn-additive, belonging to the field of metal material technology. The compositions and the mass percentages thereof are as follows: 10%-25% sodium chloride, 10%-25% potassium chloride, 1%-10% sodium fluoaluminate, 1%-10% sodium borate, and 30%-75% manganese chloride. The Mn-additive can quickly react in an aluminum melt to reduce Mn, the actual yield is high, and the reaction is an exothermic reaction which causes no furnace temperature reduction. In addition, the Mn-additive produces primary iron rich phases more quickly and more easily than conventional Mn-additive, at the same time, the addition proportion of Mn is lessened, the Mn residual is reduced. The Mn-additive is convenient for use, low-cost, and is easy to operate.

Description

technical field [0001] The invention relates to an additive in the technical field of metal materials, in particular to a boride-containing aluminum alloy manganese additive. Background technique [0002] With the continuous improvement of global energy and environmental protection requirements, secondary aluminum alloys occupy an increasingly important position in the production of my country's aluminum industry, because the energy required for re-melting scrap aluminum is much lower than the refining process of primary aluminum. However, scrap aluminum comes from a wide range of sources, and sorting is difficult. There are usually many types of impurities, and the content is generally high. This is a major difficulty in the production of recycled aluminum. Reducing the content of impurities to the allowable range is the main direction of current research. Iron is the most common impurity element among them, and it is the most harmful to the performance of the alloy. Since...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/06
Inventor 疏达高建卫葛维燕孙宝德王俊
Owner 江西金达通新材料科技有限公司
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