Microalloy smelting process for aluminum-magnesium-silicon aluminum alloy

A technology of micro-alloying and aluminum alloy, which is applied in the field of micro-alloying smelting process of aluminum-magnesium-silicon-based aluminum alloys, can solve the problem that it takes a long time for silicon element to dissolve, diffuse and absorb, and magnesium element needs a long time for dissolution and diffusion. Time, slow dissolution and diffusion of silicon elements, etc., to achieve good alloying effect, reduce insoluble hard points and slag content, and improve the effect of grain refinement

Active Publication Date: 2012-11-07
SHANDONG INNOVATION METAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of the (1) method of adding silicon is: the AlSi20 master alloy needs to be prepared separately, prolonging the technological process, increasing energy consumption and metal burning loss; The flux increases the burning loss of aluminum and silicon, which is easy to cause slag inclusion, and it takes a long time for the dissolution, diffusion and absorption of silicon element; the disadvantage of the (3) silicon addition method is that the dissolution and diffusion speed of silicon element are very fast Slow, the alloying time is longer, and it is easy to cause composition segregation
At present, the disadvantage of adding magnesium by pressing or stirring is that the metal burns a lot, and slag inclusion is easy to occur, and it takes a long time for the dissolution and diffusion of magnesium, which is easy to cause component segregation.

Method used

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  • Microalloy smelting process for aluminum-magnesium-silicon aluminum alloy
  • Microalloy smelting process for aluminum-magnesium-silicon aluminum alloy
  • Microalloy smelting process for aluminum-magnesium-silicon aluminum alloy

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Embodiment 1

[0018] Embodiment 1: The composition of the 6063 aluminum alloy of the present invention includes: Si: 0.38-0.42%, Mg: 0.5-0.55%, Fe≤0.20%, Ti: 0.010-0.015%, and the balance is aluminum. (1) Transfer 11 tons of electrolytic aluminum liquid into the melting furnace, add 3 tons of solid cold material (Al99.70 remelted aluminum ingot), and adjust the temperature of the aluminum liquid to 740°C; (2) Transfer 700Kg of electrolytic aluminum liquid into the intermediate frequency Induction furnace, add 95Kg industrial silicon, turn on the power supply and heat for 20-30 minutes, the intermediate frequency induction furnace will rapidly heat up and rely on its own electromagnetic stirring to promote the dissolution, diffusion and absorption of silicon, ensuring the prepared AlSi12 liquid master alloy (hereinafter referred to as AlSi12 aluminum liquid) composition uniformity; (3) AlSi12 aluminum liquid is refined; the refining temperature is 730-750 ° C, and the refining agent (the grad...

Embodiment 2

[0019] Embodiment 2: The composition of the 6005 aluminum alloy of the present invention includes: Si: 0.75-0.80%, Mg: 0.5-0.55%, Fe≤0.20%, Ti: 0.010-0.015%, and the balance is aluminum. (1) Transfer 11 tons of electrolytic aluminum liquid into the melting furnace, add 3 tons of solid cold material (Al99.70 aluminum ingot), and adjust the temperature of the aluminum liquid to 740°C; (2) Transfer 990Kg of electrolytic aluminum liquid into the intermediate frequency induction furnace , add 135Kg industrial silicon, turn on the power supply and heat for 30-40 minutes, and prepare AlSi12 liquid master alloy (hereinafter referred to as AlSi12 aluminum liquid); The standard YS / T 491-2005 stipulates that the grade is RJ1-1), the dosage is 2Kg / T-Al, and the refining gas is argon with a purity of more than 99.99%; (4) Adjust the temperature of the AlSi12 aluminum liquid to 750°C; (5) Flush the AlSi12 aluminum liquid in the L-shaped launder for magnesium ingots (the addition of magnesiu...

Embodiment 3

[0027] Such as image 3 and Figure 4 As shown, the structure of the chute of the present invention includes a chute body, and the chute body includes a horizontal section chute 8, an inclined section chute 7 and a vertical section chute 6, and the horizontal section chute 8 and the vertical section chute The straight section launder 6 is respectively arranged at both ends of the inclined section launder 7, the other end of the horizontal section launder 8 is connected with the melting furnace 1, and the upper part of the launder body is provided with a heat preservation cover.

[0028] The heat preservation cover is hinged with the launder body, and the heat preservation cover is a segmented structure, including a horizontal upper cover 2, an inclined upper cover 3 and a vertical upper cover 4, and the horizontal upper cover 2, the inclined upper cover 3 and the vertical upper cover 4 are respectively arranged on the upper part of the horizontal section chute 8, the inclined...

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Abstract

The invention discloses a microalloy smelting process for an aluminum-magnesium-silicon aluminum alloy, and belongs to the field of aluminum product processing. Electrolytic aluminum liquid and industrial silicon are prepared into a AlSi12 liquid intermediate alloy in an intermediate frequency furnace, the liquid intermediate alloy is utilized to scour a magnesium ingot in a special runner, and the mixed aluminum liquid is diluted in a smelting furnace to form an aluminum-magnesium-silicon aluminum alloy melt with good alloying effect. The process can replace a silicon addition method for adding industrial silicon, rapid dissolution silicon or an aluminum-silicon intermediate alloy and a magnesium addition method for stirring or pressing the magnesium ingot into the smelting furnace, which are commonly used at present, is favorable for full dissolution, diffusion and absorption of Mg and Si elements, and facilitates formation and uniform distribution of a Mg2Si strengthening phase so as to improve the quality and processability of extrusion ingot products.

Description

technical field [0001] The invention relates to an aluminum alloy smelting process, in particular to a microalloying smelting process for an aluminum-magnesium-silicon-based aluminum alloy. Background technique [0002] Aluminum-magnesium-silicon aluminum alloys are medium-strength aluminum alloys, which not only have excellent thermoplasticity, corrosion resistance and ideal mechanical properties, but also are easy to oxidize and color, so they are widely used in the fields of industrial profiles and architectural profiles. The main alloying elements of aluminum-magnesium-silicon aluminum alloys are magnesium and silicon, and the main strengthening phase is Mg 2 Si phase, and a small amount of excess Si phase and AlFeSi phase. The shape, size and distribution characteristics of these strengthening phases determine the processing performance of the alloy material and the mechanical properties of the final product. With the continuous improvement of people's quality awarene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/06C22C21/08C22C21/02
Inventor 崔立新崔华清孟祥永
Owner SHANDONG INNOVATION METAL TECH
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