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High-strength aluminum alloy bar and preparing method thereof

An aluminum alloy and aluminum-silicon alloy technology, applied in the field of high-strength aluminum alloy bars and their preparation, can solve the problems of low material plasticity, infrequent application, waste of energy, etc., and achieve fine grains, no energy waste, natural placement obvious effect

Inactive Publication Date: 2019-05-07
广东精美特种型材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

2xxx series aluminum alloys belong to aviation aluminum materials, which are not commonly used in conventional industries at present
[0003] Most of the 2xxx series aluminum alloys can only obtain high-strength material properties under the condition of secondary or tertiary heat treatment for a long time, which not only needs to invest in high-end temperature control and aging equipment, but also wastes a lot of energy, and the plasticity of the material is also low. , the purpose of this patent is to develop a high-strength aluminum alloy above 480Mpa without heat treatment under natural storage conditions

Method used

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  • High-strength aluminum alloy bar and preparing method thereof

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Effect test

Embodiment 1

[0029] A high-strength aluminum alloy bar, the aluminum alloy includes the following elements in terms of mass percentage: Mg 0.70-0.90%, Si 0.55-0.65%, Mn 0.70-0.80%, Cu 3.7-4.3%, Fe≤0.50%, Cr ≤0.10%, Zn≤0.10%, Zr0.02~0.06%, Ti 0.02~0.06%, the balance is Al and unavoidable impurity elements, the single content of impurity elements is ≤0.05%, and the total amount of impurity elements is ≤0.15%.

[0030] The solid solubility of Mg in aluminum alloy extruded rods is relatively high, which can improve the strength of aluminum alloy extruded rods through solid solution strengthening. Mg and Si also form Mg 2 The Si strengthening phase enhances the strength of aluminum alloy extruded rods. The higher the Mg content, the higher the strength of the aluminum alloy extruded rod. Combined with the Si element content, the Mg content is 0.7-0.9%.

[0031] In addition to forming Mg with Mg, Si 2 In addition to the Si strengthening phase enhancing the strength of aluminum alloy extruded...

Embodiment 2

[0051] On the basis of Example 1, this Example 2 provides a high-strength aluminum alloy rod and its preparation method. The aluminum alloy includes the following elements by mass percentage: Mg 0.75%, Si 0.60%, Mn 0.77%, Cu 4.0%, Fe0.17%, Ti 0.04%, Zr 0.04%, the balance is Al and unavoidable impurity elements, the individual content of impurity elements is ≤0.05%, and the total amount of impurity elements is ≤0.15%.

[0052] In the steps of the preparation method of the aluminum alloy extruded rod:

[0053] The first step: prepare materials according to the requirements of chemical composition standards, and prepare raw materials such as aluminum ingots, magnesium ingots, aluminum-silicon alloys, aluminum-manganese alloys, aluminum-copper alloys, aluminum-zirconium alloys and aluminum-titanium-boron alloy rods;

[0054] Step 2: Add aluminum ingots to the melting furnace to heat up and melt, measure the temperature at 735°C, then add magnesium ingots, aluminum-silicon alloys, ...

Embodiment 3

[0062] On the basis of Example 1, a high-strength aluminum alloy rod that can be obtained through natural aging and its preparation method, the aluminum alloy includes the following elements in terms of mass percentage: Mg 0.75%, Si 0.56%, Mn 0.79% , Cu4.1%, Fe 0.20%, Ti 0.04%, Zr 0.04%, the balance is Al and unavoidable impurity elements, the individual content of impurity elements is ≤0.05%, and the total amount of impurity elements is ≤0.15%.

[0063] In the steps of the preparation method of the aluminum alloy extruded rod:

[0064] The first step: prepare materials according to the requirements of chemical composition standards, and prepare raw materials such as aluminum ingots, magnesium ingots, aluminum-silicon alloys, aluminum-manganese alloys, aluminum-copper alloys, aluminum-zirconium alloys and aluminum-titanium-boron alloy rods;

[0065] Step 2: Add aluminum ingots to the melting furnace to heat up and melt, measure the temperature at 750°C, then add magnesium ingo...

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Abstract

The invention provides a high-strength aluminum alloy bar and a preparing method thereof. An aluminum alloy comprises the following elements including, by mass percent, 0.70%-0.90% of Mg, 0.55%-0.65%of Si, 0.70%-0.80% of Mn, 3.7%-4.3% of Cu, smaller than or equal to 0.50% of Fe, smaller than or equal to 0.10% of Cr, smaller than or equal to 0.10% of Zn, 0.02%-0.06% of Zr, 0.02%-0.06% of Ti and the balance Al and inevitable impurity elements, wherein the content of the single impurity element is smaller than or equal to 0.05%, and the total amount of the impurity elements is smaller than or equal to 0.15%. By means of the high-strength aluminum alloy bar and the preparing thereof, the content of Cu and Mg is adjusted and the minor Zr elements are added so that grains of the extruded aluminum alloy bar can be fine, and after the aluminum alloy bar is naturally put for 96 H, the good texture performance that the strength is high, and high temperature resistance is achieved are obtained.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy preparation, and in particular relates to a high-strength aluminum alloy rod and a preparation method thereof. Background technique [0002] The 2xxx series aluminum alloy is characterized by high hardness, among which the copper content is the highest, about 3-5%. 2xxx series aluminum alloys belong to aviation aluminum materials, which are not commonly used in conventional industries at present. At present, there are few manufacturers in our country that can obtain high-strength aluminum alloys through natural placement of 2xxx series. The quality can not be compared with foreign countries. At present, it is mainly provided by manufacturers in European countries such as Germany. [0003] Most of the 2xxx series aluminum alloys can only obtain high-strength material properties under the condition of secondary or tertiary heat treatment for a long time, which not only needs to invest in h...

Claims

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Application Information

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IPC IPC(8): C22C21/16C22C21/18C22C1/03C22F1/057
Inventor 罗涛涛蔡月华陈海山周江平刘欢程炳灵朱世安余琳玲
Owner 广东精美特种型材有限公司
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