Preparation method of Al3Ti particle reinforced 2618 aluminium alloy composite

A composite material and particle-reinforced technology, which is applied in the field of preparation of Al3Ti particle-reinforced 2618 aluminum alloy composite materials, can solve the problems that the 2618 alloy cannot meet industrial applications, use restrictions, and high cost.

Active Publication Date: 2015-02-25
山东雪地铝业科技有限公司
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0002] 2618 aluminum alloy (namely wrought aluminum LD7) is an alloy with the best heat resistance among traditional forged aluminum alloys. At a temperature above 120°C, its mechanical properties are higher than those of 7000 series alloys. It is widely used in the manufacture of aero-engines and automobiles. Industrial high-temperature parts, but the 2618 alloy cast by the general casting method cannot meet the needs of industrial applications, so 2618 manufacturers and related units have carried out methods such as micro-alloying, deformation heat treatment and particle-reinforced 2618 alloy-based composite materials to excavate 2618 Alloy Potential Properties
However, because the Al-7.0wt.%Ti alloy powder used is obtained by the fog method, the cost is high, so its use is limited
By introducing dispersed distributed high temperature strengthening phase Al into the alloy 3 The Ti phase can effectively improve the heat resistance of the 2618 alloy, but the Al-Ti master alloy sold on the market or Al 3 The Ti phase is in the form of thick needle flakes or blocks (does not meet the requirements for use), or the cost is expensive

Method used

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  • Preparation method of Al3Ti particle reinforced 2618 aluminium alloy composite
  • Preparation method of Al3Ti particle reinforced 2618 aluminium alloy composite
  • Preparation method of Al3Ti particle reinforced 2618 aluminium alloy composite

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment one: Preparation of 2618 alloy: According to the ratio of each alloy element in Table 1, Cu element is 2.3wt.%; Mg element is 1.6wt.%; Fe element is 1.1wt.%; Ni element is 1.1wt.%; Al element is the balance , you must prepare Al-50 wt.%Cu alloy 4.60g; Al-8 wt.%Fe13.75g; Al-8 wt.%Ni alloy 13.75g and 1.60g pure magnesium and 66.30g pure aluminum.

[0021] first at 720 Next, melt pure aluminum in a pit furnace of model SG2-1.5-10 and hold it for 10 minutes, then wrap Al-8 wt.%Fe, Al-8 wt.%Ni and Al-50 wt.% with aluminum foil Cu is added to the molten aluminum, and 3~5g of homemade 30NaCl-45KCl-25Na is quickly sprinkled on the surface of the alloy 3 AlF 6 (weight ratio, the same below) Covering agent, keep warm for 10 minutes and stir, use a bell jar to press the magnesium block with the surface oxide scale removed into the alloy liquid; after it is completely melted, sprinkle a layer of covering agent (2g ), after standing for 3~5 minutes, remove the cover...

Embodiment 2

[0022] Embodiment two: Preparation of Al with 0.5% Ti content 3 Ti particle reinforced 2618 aluminum alloy composite material: the molten Al-10 wt.%Ti master alloy is uniformly cast on a high-speed turbine with a rotation speed of 500 rpm in a small stream, and the master alloy liquid is rapidly absorbed by the centrifugal force of the turbine Throw it into room temperature water to obtain a rapidly solidified Al-10 wt.%Ti master alloy; the microstructure of the Al-10 wt.%Ti master alloy after high-speed rotating water cooling is as follows image 3 As shown, it can be seen that compared with before water cooling, Al 3 The Ti phase is obviously refined.

[0023] The total weight of the prepared sample (the total weight of Al-10 wt.%Ti master alloy + 2618 alloy) is 100g, take 5g of dried turbine high-speed rotating water-cooled Al-10 wt.%Ti master alloy particles, prepare the rest according to Table 1 For alloying elements, 95g of 2618 alloy must be prepared, specifically 4.6...

Embodiment 3

[0025] Embodiment three: Preparation of Al with 1.0% Ti content 3 Ti particle reinforced 2618 aluminum alloy composite material: the molten Al-10 wt.%Ti master alloy is uniformly cast on a high-speed turbine with a speed of 500 rpm in a small stream, and the master alloy liquid is quickly thrown into room temperature water. A rapidly solidified Al-10 wt.%Ti master alloy was obtained.

[0026] The total weight of the prepared sample (the total weight of Al-10 wt.%Ti master alloy + 2618 alloy) is 100g, take 10g of dried turbine high-speed rotating water-cooled Al-10 wt.%Ti master alloy particles, and prepare the rest according to Table 1 For alloying elements, 90g of 2618 alloy must be prepared, specifically 4.60g of Al-50Cu alloy, 13.75g of Al-8 wt.%Fe, 13.75g of Al-8 wt.%Ni alloy, 1.60g of pure magnesium and 56.30g of pure aluminum.

[0027] Press the Al-10Ti intermediate alloy particles wrapped in aluminum foil into the molten 2618 alloy liquid below the surface of the mol...

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Abstract

The invention relates to the field of Al3Ti particle reinforced 2618 aluminium alloy composite preparation. A preparation method comprises the particular steps that a molten Al-10wt.% intermediate alloy is cast on a high-speed rotating turbine in a small liquid flow manner and quickly flies into water at a room temperature, so that small quickly solidified Al-10wt.%Ti intermediate alloy particles are obtained; then the obtained small Al-10wt.%Ti intermediate alloy particles and 2618 alloy liquid are subjected to solid-liquid mixed casting; and the Al3Ti particle reinforced 2618 aluminium alloy composite which is fine in crystal particle is obtained by controlling the stirring time and the adding amount of the intermediate alloy.

Description

technical field [0001] The present invention relates to Al 3 In the field of Ti particle reinforced 2618 aluminum alloy composite material preparation, specifically, the molten Al-10wt.%Ti master alloy is cast on a high-speed rotating turbine and quickly flew into room temperature water in the form of a small liquid flow, so as to obtain a rapidly solidified Al -10wt.% Ti master alloy small particles, and then carry out solid-liquid mixed casting of the obtained Al-10wt.% Ti master alloy small particles with 2618 alloy liquid, and obtain crystal grains by controlling the stirring time and the amount of master alloy added Tiny Al 3 Ti particle reinforced 2618 aluminum alloy composite. Background technique [0002] 2618 aluminum alloy (namely wrought aluminum LD7) is an alloy with the best heat resistance among traditional forged aluminum alloys. At a temperature above 120°C, its mechanical properties are higher than those of 7000 series alloys. It is widely used in the manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/00
Inventor 王建华伍波王广飞苏旭平涂浩刘亚
Owner 山东雪地铝业科技有限公司
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