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Ultra-fine crystal aluminum alloy used for preparing pipe fitting

An aluminum alloy, ultra-fine grain technology, applied in the field of alloy materials, can solve the problems of reducing hardness, strength and corrosion resistance, and achieve the effect of improving machinability, tensile properties and processing characteristics, and balancing comprehensive performance.

Active Publication Date: 2018-09-28
苏州新金相金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the aluminum alloy materials prepared by the conventional process, while improving the processing characteristics through grain refinement, the hardness, strength and corrosion resistance of the material will be correspondingly reduced, and it is difficult to balance various mechanical properties

Method used

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  • Ultra-fine crystal aluminum alloy used for preparing pipe fitting
  • Ultra-fine crystal aluminum alloy used for preparing pipe fitting

Examples

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Effect test

Embodiment 1

[0039] An ultra-fine-grained aluminum alloy used in the preparation of pipe fittings. The raw material components of the aluminum alloy include 0.3wt% crystal phase modifier and 99.7wt% 7075 aluminum alloy; wherein, the 7075 aluminum alloy contains the following elements in mass percentage: Zn: 5.25%; Mg: 2.78%; Cu: 1.25%; Si: 0.13%; Fe: 0.15%; Cr: 0.09%; Zr: 0.08%, Mn: 0.05%; Ti: 0.02%; unavoidable impurities.

[0040] The preparation method of the ultrafine-grained aluminum alloy provided in this embodiment includes the following steps:

[0041] (1) Add the 7075 aluminum alloy with the above element composition into the melting furnace, heat the aluminum ingot to 720°C, add the aluminum covering agent when the aluminum ingot starts to melt, and put the crystal phase modifier into the melting furnace when the aluminum ingot is completely melted At the bottom of the aluminum melt in the furnace, raise the furnace temperature to 830°C, electromagnetically stir and heat-preserv...

Embodiment 2

[0048] An ultra-fine-grained aluminum alloy used in the preparation of pipe fittings. The raw material components of the aluminum alloy include 0.5wt% crystal phase regulator and 99.5wt% 7075 aluminum alloy; wherein, the 7075 aluminum alloy contains the following elements in mass percentage: Zn: 6.58%; Mg: 2.88%; Cu: 2.14%; Si: 0.17%; Fe: 0.22%; Cr: 0.16%; Zr: 0.15%, Mn: 0.07%; Ti: 0.03%; unavoidable impurities.

[0049] The preparation method of the ultrafine-grained aluminum alloy provided in this embodiment includes the following steps:

[0050] (1) Add the 7075 aluminum alloy with the above element composition into the melting furnace, heat the aluminum ingot to 760°C, add the aluminum covering agent when the aluminum ingot starts to melt, and put the crystal phase modifier into the melting furnace when the aluminum ingot is completely melted At the bottom of the aluminum melt in the furnace, raise the furnace temperature to 860°C, electromagnetically stir and heat-preser...

Embodiment 3

[0057] An ultra-fine-grained aluminum alloy used in the preparation of pipe fittings. The raw material components of the aluminum alloy include 0.4wt% crystal phase regulator and 99.6wt% 7075 aluminum alloy; wherein, the 7075 aluminum alloy contains the following elements by mass percentage: Zn: 6.15%; Mg: 2.82%; Cu: 1.60%; Si: 0.15%; Fe: 0.19%; Cr: 0.13%; Zr: 0.12%, Mn: 0.06%; Ti: 0.03%; unavoidable impurities.

[0058] The preparation method of the ultrafine-grained aluminum alloy provided in this embodiment includes the following steps:

[0059] (1) Add the 7075 aluminum alloy with the above element composition into the melting furnace, heat the aluminum ingot to 740°C, add the aluminum covering agent when the aluminum ingot starts to melt, and put the crystal phase modifier into the melting furnace when the aluminum ingot is completely melted At the bottom of the aluminum melt in the furnace, raise the furnace temperature to 850°C, electromagnetically stir and heat-preser...

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Abstract

The invention relates to the technical field of alloy materials, in particular to an ultra-fine crystal aluminum alloy used for preparing a pipe fitting. Raw material compositions of the aluminum alloy comprise 0.3-0.5 wt% of crystalline phase conditioning agent and 99.5-99.7 wt% of 7075 aluminum alloy, wherein the 7075 aluminum alloy contains the following elements including, by mass, 5.25-6.58%of Zn, 2.78-2.88% of Mg, 1.25-2.14% of Cu, 0.13-0.17% of Si, 0.15-0.22% of Fe, 0.09-0.16% of Cr, 0.08-0.15% of Zr, 0.05-0.07% of Mn, 0.02-0.03% of Ti, and the balance Al and inevitable impurities. Thecrystalline phase conditioning agent is a novel additive, the crystal particle refining effect is much better than that of a normal Al-Ti-B crystal particle refining agent. The aluminum alloy material has the beneficial effects of being high in hardness, good in strength and excellent in corrosion resistant performance, and due to the good refining effect of crystal particles in fine texture, thealuminum alloy has an excellent processing characteristic.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to an ultrafine-grained aluminum alloy used in the preparation of pipe fittings. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. The density of aluminum alloy is low, but its strength is relatively high, which is close to or exceeds that of high-quality steel. The material has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, Thermal conductivity and corrosion resistance. At present, aluminum alloy has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry; the amount used in industry is second only to steel. With the rapid development of industrial economy, the demand for aluminum alloy structural parts is increasing, which also promotes more in-depth research on the properties of aluminum ...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/06C22C1/03C22C1/02C22F1/053
CPCC22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 万明军
Owner 苏州新金相金属材料有限公司
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