High-toughness casting aluminum alloy and preparation method thereof

A technology for casting aluminum alloys and aluminum-silicon intermediate alloys, which is applied in the field of metal materials, can solve the problems of long production cycle, high requirements, and many processes, and achieve the effects of low production cost, large impact load, and good toughness

Inactive Publication Date: 2010-12-15
宁波旭润铝业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the deformed aluminum alloy has ideal high strength and toughness properties, its processing process requires high equipment and tooling molds, and there are many processes, so the production cycle is long and the cost is high.

Method used

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  • High-toughness casting aluminum alloy and preparation method thereof
  • High-toughness casting aluminum alloy and preparation method thereof
  • High-toughness casting aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare 1500g of the high-toughness cast aluminum alloy material of the present invention, the composition of the alloy material is Mg 11%, Ti0.3%, RE 0.2%, Si 0.15%, and the rest are aluminum and unavoidable trace impurities, wherein a single trace impurity The content of elements is <0.10%, and the total amount of trace impurities is <0.50%.

[0026] The preparation method is as follows:

[0027] (1) Raw material preparation aluminum block (aluminum ≥ 99.7%), magnesium block (magnesium ≥ 99.95%), K 2 TiF 6 (content ≥ 99%), aluminum-rare earth master alloy (aluminum 90% Al, rare earth 10%), aluminum-silicon master alloy (aluminum 88% Al, silicon 12%).

[0028] With reference to "Casting Handbook" (volume 3, casting non-ferrous alloys, 2nd edition, Machinery Industry Press, 2001, P187-188) and experience to determine the amount of burning loss of aluminum alloy elements of the present invention: aluminum: 1.0%, magnesium 5% ;Other materials have little change during ...

Embodiment 2

[0051] Prepare 1500g alloy material, the composition is Mg 10%, Ti 0.4%, RE 0.3%, Si 0.30%, the rest is aluminum and unavoidable trace impurities, wherein the individual impurities are <0.05%, and the total amount is <0.20%.

[0052] The preparation method is as follows:

[0053] (1) batching calculation method is the same as example 1.

[0054] (2) Using a resistance crucible furnace for melting, first sprinkle dehydrated carnallite-based flux in the graphite crucible, and then add pure aluminum and aluminum silicon preheated to 225 ° C; after melting, use the total amount of furnace charge 4 % covering agent protection; when the furnace temperature rises to 670°C, add pure magnesium block preheated to about 200°C and stir until it is completely melted; add aluminum rare earth master alloy preheated to about 200°C at 730°C, and stir quickly until mixed Evenly, alloy liquid is obtained.

[0055] (3) When the furnace temperature drops to 730°C, the drying refining agent (the ...

Embodiment 3

[0059] Prepare 1500g alloy material, the composition is Mg 9.5%, Ti 0.1%, RE 0.1%, Si 0.20%, the rest is aluminum and unavoidable trace impurities, wherein the individual impurities are <0.05%, and the total amount is <0.20%.

[0060] The preparation method is as follows:

[0061] (1) Batching calculation method is the same as Example 1. .

[0062] (2) Use a resistance crucible furnace to smelt, first sprinkle a dehydrated carnallite-based flux (moisture content ≤ 0.5%) into the graphite crucible, and then add preheated pure aluminum and aluminum-silicon in the middle; after clearing Use a covering agent covering 3% of the total charge for protection; add preheated pure magnesium block when the furnace temperature rises to 680°C, and stir while melting until it is completely melted; add preheated aluminum rare earth master alloy at 740°C, and stir quickly until mixed Uniform;

[0063] (3) When the furnace temperature drops to 730°C, the dried refining agent (the refining ag...

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Abstract

The invention discloses a high-toughness casting aluminum alloy containing the following components in percentage by weight: 9.5-11.0 percent of Mg, 0.1-0.4 percent of Ti, 0.1-0.3 percent of RE, 0.15-0.30 percent of Si and the balance of Al and unavoidable trace impurities, wherein the content of single elements in the trace impurities is less than 0.10 percent, and the total content of the trace impurities is less than 0.50 percent. The invention also discloses a preparation method of the high-toughness casting aluminum alloy. The high-toughness casting aluminum alloy has the advantages of high tensile strength, high elongation, low price of raw materials, short production flow, easy control on the process flow and the like, and complicated smelting equipment and subsequent thermal treatment hot standby are not needed; on the premise of satisfying the mechanical properties of the members, the overall production cost is lower.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a high-strength cast aluminum alloy and a preparation method thereof. Background technique [0002] As a traditional metal material, cast aluminum alloy is widely used in aviation, aerospace, automobile, machinery and other industries due to its low density and high specific strength. With the development of modern industry and new casting technologies, there is an increasing demand for cast aluminum alloys, especially those with special properties, such as high strength, excellent wear resistance and corrosion resistance. After decades of development, high-strength cast aluminum alloys have formed a complete series, with stable performance and increasingly perfect production methods. They have become an indispensable alloy system in the field of materials and have been widely used in the automotive, aerospace and aviation industries. Applications. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
Inventor 李继强马小利董选普樊自田陈俊龙李贤义刘文
Owner 宁波旭润铝业有限公司
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