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High-strength/toughness and high-stability cast aluminum magnesium alloy material and preparation method thereof

A high-stability, cast aluminum technology, applied in the field of cast aluminum-magnesium alloy materials in the field of metal materials technology, can solve problems such as stress cracking, elongation decrease, stress corrosion of critical components, etc., to achieve enhanced solid solution strengthening, oxidation clamping The effect of reducing the probability of slag and improving the corrosion resistance of alloys

Active Publication Date: 2015-11-18
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high magnesium content of this alloy has exceeded the solid solubility limit of magnesium in the aluminum matrix, which can easily lead to a sharp drop in elongation in the long-term natural aging state, causing stress corrosion and stress cracking in critical components

Method used

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  • High-strength/toughness and high-stability cast aluminum magnesium alloy material and preparation method thereof

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Effect test

Embodiment 1

[0032] A kind of aluminum-magnesium alloy material, its component mass percent is: Mg: 9.3%, Zn: 1.3%, Ca: 0.2%, Ti: 0.4%, Ce: 0.35%, Sr: 0.1%, Fe=0.12%, Ni =0.02%, Cu=0.05%, Si=0.07%, Mn=0.006%, and the balance is Al.

[0033] The preparation method comprises the following steps: (1) According to the composition requirements of Al-Mg-Zn-Ca-Ti-Ce-Sr aluminum-magnesium alloy, weigh 165Kg of pure aluminum ingot, 16.8Kg of pure magnesium ingot, 2.6Kg of pure zinc ingot, aluminum 10 titanium master alloy 9.4Kg, aluminum calcium master alloy 1.9Kg, aluminum strontium master alloy 1.2Kg, magnesium 30 cerium master alloy 2.75Kg. Among them, the aluminum content of pure aluminum ingots is not less than 99.8%, the magnesium content of pure magnesium ingots is not less than 99.95%, the zinc content of pure zinc ingots is not less than 99.99%, and the average content of titanium elements in aluminum-titanium master alloys is not less than 9.5%, the average content of calcium in the alum...

Embodiment 2

[0045] The mass percentages of aluminum-magnesium alloy components are: Mg: 9.8%, Zn: 1.4%, Ca: 0.3%, Ti: 0.28%, Ce: 0.45%, Sr: 0.15%, Fe=0.15%, Ni=0.01%, Cu =0.04%, Si=0.1%, Mn=0.008%, and the balance is Al.

[0046] The preparation method comprises the following steps: (1) According to the composition requirements of Al-Mg-Zn-Ca-Ti-Ce-Sr aluminum-magnesium alloy, weigh 163.6Kg of pure aluminum ingot, 17.7Kg of pure magnesium ingot, 2.8Kg of pure zinc ingot, Aluminum 10 titanium master alloy 6.6Kg, aluminum calcium master alloy 2.85Kg, aluminum strontium master alloy 1.8Kg, magnesium 30 cerium master alloy 3.53Kg. Among them, the aluminum content of pure aluminum ingots is not less than 99.8%, the magnesium content of pure magnesium ingots is not less than 99.95%, the zinc content of pure zinc ingots is not less than 99.99%, and the average content of titanium elements in aluminum-titanium master alloys is not less than 9.5%, the average content of calcium in the aluminum-ca...

Embodiment 3

[0058] The mass percentage of aluminum-magnesium alloy components is: Mg: 9.4%, Zn: 1.5%, Ca: 0.4%, Ti: 0.2%, Ce: 0.5%, Sr: 0.12%, Fe=0.10%, Ni=0.01%, Cu =0.04%, Si=0.08%, Mn=0.01%, and the balance is Al.

[0059]The preparation method comprises the following steps: (1) According to the composition requirements of Al-Mg-Zn-Ca-Ti-Ce-Sr aluminum-magnesium alloy, weigh 164Kg of pure aluminum ingot, 17Kg of pure magnesium ingot, 3Kg of pure zinc ingot, 10Kg of aluminum and titanium Master alloy 4.7Kg, aluminum calcium master alloy 2.8Kg, aluminum strontium master alloy 1.44Kg, magnesium 30 cerium master alloy 2.93Kg. Among them, the aluminum content of pure aluminum ingots is not less than 99.8%, the magnesium content of pure magnesium ingots is not less than 99.95%, the zinc content of pure zinc ingots is not less than 99.99%, and the average content of titanium elements in aluminum-titanium master alloys is not less than 9.5%, the average content of calcium in the aluminum-calc...

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Abstract

The invention provides a high-strength / toughness and high-stability cast aluminum magnesium alloy material. The material comprises the following components in percentage by mass: 9.3-9.8% of Mg, 1.3-1.5% of Zn, 0.2-0.4% of Ca, 0.2-0.4% of Ti, 0.2-0.5% of Ce, 0.1-0.15% of Sr, Fe not more than 0.15%, Ni not more than 0.03%, Cu not more than 0.06%, Si not more than 0.1%, Mn not more than 0.01%, and the balance is Al. The obtained aluminum magnesium alloy material is excellent in room-temperature mechanical property, excellent in natural aging stability and harmless in alloy components.

Description

technical field [0001] The invention relates to a cast aluminum-magnesium alloy material in the technical field of metal materials, in particular to a cast aluminum-magnesium alloy material with high strength, toughness and high aging stability. Background technique [0002] Cast aluminum-magnesium alloy (ZL3XX series), as a structural material for naval equipment with light specific gravity, high specific strength, excellent comprehensive mechanical properties and excellent seawater corrosion resistance, has been widely used in my country's national defense field and civil ship industry. However, with the upgrading of equipment performance and the increasing complexity of the natural environment, the current conventional cast aluminum-magnesium alloy materials can no longer meet the requirements of new naval equipment for the mechanical properties and service stability of key components. [0003] There are three grades of cast aluminum-magnesium alloys in my country. Among...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/06C22F1/047
Inventor 陈强万元元赵高瞻黄志伟王艳彬夏祥生赵祖德
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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