A high-strength high-magnesium aluminum alloy and its casting process

A high-magnesium-aluminum alloy, high-strength technology, applied in the field of high-strength, high-magnesium aluminum alloy and its casting process, can solve problems such as low strength, and achieve the effects of overcoming casting cracks, improving the appearance of castings, and improving surface quality

Active Publication Date: 2022-03-11
康硕(山西)智能制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the preparation of high-magnesium aluminum alloys with a magnesium content of 7-11%, the casting process often used is investment casting, and the yield strength of the high-magnesium aluminum alloys obtained is in the range of 140-210Mpa, and the tensile strength is 250 -280MPa, it can be seen that its strength is much lower than that of high-magnesium aluminum alloys prepared by spin casting

Method used

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  • A high-strength high-magnesium aluminum alloy and its casting process
  • A high-strength high-magnesium aluminum alloy and its casting process

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Effect test

Embodiment 1

[0038] A high-strength high-magnesium aluminum alloy, the raw materials for preparing high-magnesium aluminum alloy include the following raw materials in mass percentage: Mg8.03%, Mn0.58%, Zr0.56%, Sc0.43%, Fe0.09%, Cd0.11%, Ti0.08 %, Cr 0.42%, the balance is Al and other unavoidable impurities.

[0039] The smelting process specifically includes the following steps:

[0040] S1. Prepare raw materials for preparing high-magnesium aluminum alloys according to the above proportions.

[0041] S2. Melting aluminum ingots: Melt aluminum ingots at a temperature of 750°C. After the aluminum ingots are smelted, heat preservation and smelting at a temperature of 750°C for 15 minutes, then add other alloy raw materials (Mg, Mn, Zr, Sc, Fe, Cd, Ti, Cr ), and smelt other alloy raw materials at a temperature of 750°C to obtain the initial smelting alloy liquid.

[0042] S3. After adding 0.07wt% refining agent to the initial smelting alloy liquid, carry out standing treatment at a temper...

Embodiment 2

[0047] A high-strength high-magnesium aluminum alloy, the raw materials for preparing high-magnesium aluminum alloy include the following raw materials in mass percentage: Mg7.96%, Mn 0.5%, Zr 0.1%, Sc 0.3%, Fe 0.01%, Cd 0.02%, Ti 0.03 %, Cr 0.3%, the balance is Al and other unavoidable impurities.

[0048] The smelting process specifically includes the following steps:

[0049] S1. Prepare raw materials for preparing high-magnesium aluminum alloys according to the above proportions.

[0050] S2. Melting aluminum ingots: Melt aluminum ingots at a temperature of 720°C. After the aluminum ingots are smelted, heat preservation and smelting at a temperature of 720°C for 18 minutes, then add other alloy raw materials (Mg, Mn, Zr, Sc, Fe, Cd, Ti, Cr ), and smelt other alloy raw materials at a temperature of 720°C to obtain the initial smelting alloy liquid.

[0051] S3. After adding 0.07wt% refining agent to the initial smelting alloy liquid, carry out standing treatment at a temp...

Embodiment 3

[0056] A high-strength high-magnesium aluminum alloy, the raw materials for preparing high-magnesium aluminum alloy include the following raw materials in mass percentage: Mg11.2%, Mn0.8%, Zr0.9%, Sc0.56%, Fe0.15%, Cd0.16%, Ti0.12 %, Cr 0.52%, the balance is Al and other unavoidable impurities.

[0057] The smelting process specifically includes the following steps:

[0058] S1. Prepare raw materials for preparing high-magnesium aluminum alloys according to the above proportions.

[0059] S2. Melting aluminum ingots: Melt aluminum ingots at a temperature of 780°C. After the aluminum ingots are smelted, heat preservation and smelting at a temperature of 780°C for 20 minutes, then add other alloy raw materials (Mg, Mn, Zr, Sc, Fe, Cd, Ti, Cr ), and smelt other alloy raw materials at a temperature of 780°C to obtain the initial smelting alloy liquid.

[0060] S3. After adding 0.07wt% refining agent to the initial smelting alloy liquid, carry out standing treatment at a temperat...

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Abstract

The application relates to the technical field of magnesium-aluminum alloy and its manufacture, and specifically discloses a high-strength, high-magnesium-aluminum alloy and its casting process. The high-magnesium aluminum alloy casting process includes the following steps: S1. Prepare raw materials for high-magnesium aluminum alloy preparation: prepare high-magnesium aluminum alloy raw materials in mass percentages, including Mg 7.96-11.02%, Mn 0.50-0.80%, Zr 0.1-0.9 %, Sc 0.30~0.56%, Fe 0.01~0.15%, Cd 0.02~0.16%, Ti 0.03~0.12%, Cr 0.3~0.52%, the balance is Al and other unavoidable impurities; S2, add after smelting aluminum ingot Other alloy raw materials and smelting; S3, refining; S4, adding grain refiner and removing slag; S5, casting; S6, annealing. The high-magnesium aluminum alloy of the present application has the advantage of excellent mechanical properties.

Description

technical field [0001] The present application relates to the technical field of magnesium-aluminum alloy and its manufacture, more specifically, it relates to a high-strength high-magnesium-aluminum alloy and its casting process. Background technique [0002] Magnesium-aluminum alloys are widely used in offshore working platforms because of their good acid and alkali corrosion resistance. In addition to the acid-alkali corrosion resistance of magnesium-aluminum alloys, there are also increasingly higher requirements for the strength of magnesium-aluminum alloys. Through research, it is found that the increase of magnesium content can improve the strength of magnesium-aluminum alloy. In addition, microalloying also contributes to the strength of magnesium-aluminum alloy. At present, alloys with a magnesium content in the range of 7-17.4% are called high-magnesium aluminum alloys, and alloys with a magnesium content higher than the corresponding content of the hypoeutectic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/02C22C1/06C22F1/047
CPCC22C21/06C22C1/026C22C1/06C22F1/047
Inventor 冀辉李成坤崔静云赵彬
Owner 康硕(山西)智能制造有限公司
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