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High-silicon aluminum alloy cylinder sleeve and preparation method thereof

A high-silicon aluminum alloy and cylinder liner technology, which is applied in the direction of cylinders, cylinder heads, mechanical equipment, etc., can solve the problems of complex process, long process, high cost, etc., and achieve the goal of improving strength and elongation, eliminating stress, and reducing costs Effect

Inactive Publication Date: 2015-04-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the patent needs to be made into a hollow ingot first, and then subjected to semi-solid extrusion processing, it belongs to the semi-solid thixotropic forming process, the process is complicated, the process is long, and the cost is too high

Method used

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  • High-silicon aluminum alloy cylinder sleeve and preparation method thereof
  • High-silicon aluminum alloy cylinder sleeve and preparation method thereof

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Effect test

Embodiment 1

[0030] A high-silicon aluminum alloy cylinder liner, its preparation method specifically comprises the following steps:

[0031] 1) Ingredients: mix pure aluminum, pure magnesium, aluminum magnesium, industrial crystalline silicon, aluminum manganese, aluminum rare earth, Al-Ti-C-RE, phosphor copper or sulfur according to the amount of alloying elements required; And the weight percentage of each element is: Si 25%, Mg 1.2%, Ti 1.5%, Mn 1.0%, P 0.05%, RE 2.5%, Fe 0.3%, C 0.2%, and the balance Al;

[0032] 2) Melting: The alloy ingot composed of pure aluminum with high melting point, industrial crystalline silicon, aluminum manganese, aluminum rare earth and sulfur is covered with a layer of protective flux mixed with NaCl and KCl to prevent oxidation and the amount of protective flux The alloy ingot is 2% of the weight of the alloy ingot; then the alloy ingot is added to the electric furnace for melting, and then the temperature of the melted aluminum liquid is adjusted to 820...

Embodiment 2

[0039] A high-silicon aluminum alloy cylinder liner, its preparation method specifically comprises the following steps:

[0040] 1) Ingredients: mix pure aluminum, pure magnesium, aluminum magnesium, industrial crystalline silicon, aluminum manganese, aluminum rare earth, Al-Ti-C-RE, phosphor copper or sulfur according to the amount of alloying elements required; And the weight percentage of each element is: Si 17%, Mg 0.5%, Ti 0.3%, Mn 1%, P 0.03%, RE 0.3%, Fe 0.3%, C 0.02%, and the balance is Al;

[0041] 2) Melting: Cover the alloy ingot composed of pure aluminum with high melting point, industrial crystalline silicon, aluminum manganese, aluminum rare earth and sulfur with a layer of protective flux mixed with KCl and NaF to prevent oxidation. The amount of protective flux is 3% of the weight of the alloy ingot; then put the alloy ingot into the electric furnace for smelting, then adjust the temperature of the melted aluminum to 800°C, press the low melting point aluminum ...

Embodiment 3

[0048] A high-silicon aluminum alloy cylinder liner, its preparation method specifically comprises the following steps:

[0049] 1) Ingredients: mix pure aluminum, pure magnesium, aluminum magnesium, industrial crystalline silicon, aluminum manganese, aluminum rare earth, Al-Ti-C-RE, phosphor copper or sulfur according to the amount of alloying elements required; And the weight percentage of each element is: Si 35%, Mg 5%, Ti 1.5%, Mn 2%, S 0.3%, RE 2.5%, Fe 0.6%, C 0.3%, and the balance is Al;

[0050] 2) Melting: Cover a layer of NaCl, KCl and NaSiF on the alloy ingot composed of pure aluminum with high melting point, industrial crystalline silicon, aluminum manganese, aluminum rare earth and sulfur 6 The protective flux made by mixing is used to prevent oxidation. The amount of protective flux is 1% of the weight of the alloy ingot; then the alloy ingot is added to the electric furnace for melting, and then the temperature of the molten aluminum after melting is adjusted to...

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Abstract

The invention discloses a high-silicon aluminum alloy cylinder sleeve and a preparation method thereof. The high-silicon aluminum alloy cylinder sleeve disclosed by the invention comprises the following alloy elements in percentage by weight: 17-35% of Si, 0.5-5% of Mg, 0.3-1.5% of Ti, 1-2% of Mn, 0.03-0.3% of P or S, 0.3-2.5% of RE, 0.3-0.6% of Fe, 0.02-0.3% of C, and the balance of Al. The high-silicon aluminum alloy cylinder sleeve disclosed by the invention is prepared by comprising the specific steps of smelting, refining, carrying out internal cooling type semi-solid stirring, extruding, casting, carrying out T6 heat treatment, machining, grinding and the like after compounding the above formulae. According to the invention, the phenomena of being too high in centrifugal casting working allowance and easy to cause oxidization inclusion can be effectively avoided; simultaneously, because of adopting a semi-solid rheocasting process, the secondary heating and re-smelting processes can be avoided; the process complexity is reduced; the cost is reduced; and thus, the high-silicon aluminum alloy cylinder sleeve has great application value.

Description

technical field [0001] The invention specifically relates to a high-silicon aluminum alloy cylinder liner and a preparation method thereof. Background technique [0002] The aluminum alloy engine cylinder wall has poor wear resistance, and the gray cast iron cylinder liner is embedded, which not only easily causes cylinder deformation, but also increases the weight of the engine. Due to its superior friction properties, high-silicon aluminum alloy materials can be used as advanced lightweight wear-resistant materials, and have been widely used in various transportation tools, power machinery, machine tools and special fasteners. How to develop this advanced friction material has always been the goal of material scientists from all over the world. [0003] The cylinder liner made of high-silicon aluminum alloy has excellent tribological performance. Its tribological mechanism is that the soft matrix is ​​embedded with high-hardness silicon particles and high-hardness compoun...

Claims

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Application Information

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IPC IPC(8): C22C21/04C22C1/03C22C1/06B22D18/02F02F1/00
CPCB22D18/02C22C1/026C22C1/03C22C1/06C22C21/04F02F1/004
Inventor 王沁峰王连登朱定一
Owner FUZHOU UNIV
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