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Aluminum alloy cylinder sleeve for automobile engine and preparation method of aluminum alloy cylinder sleeve

An automobile engine and aluminum alloy technology, which is applied to engine components, machines/engines, cylinders, etc., can solve the problems of inability to meet engine requirements, low performance and service life of aluminum alloy cylinder liners, and achieve an increase in the number of crystal nuclei, The effect of grain refinement and increased thermal conductivity

Active Publication Date: 2016-05-25
SHANDONG HUICHUAN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although engineers and technicians have optimized the composition, content and production process of aluminum alloy cylinder liners, in view of the nature differences between aluminum alloy and cast iron, aluminum alloy is still inferior in strength, hardness, high temperature stability and wear resistance. Due to the lack of cast iron materials, the performance and service life of aluminum alloy cylinder liners are relatively low, which cannot meet the requirements of existing engines.

Method used

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  • Aluminum alloy cylinder sleeve for automobile engine and preparation method of aluminum alloy cylinder sleeve
  • Aluminum alloy cylinder sleeve for automobile engine and preparation method of aluminum alloy cylinder sleeve
  • Aluminum alloy cylinder sleeve for automobile engine and preparation method of aluminum alloy cylinder sleeve

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preparation example Construction

[0045] The present invention also provides a method for preparing an aluminum alloy cylinder liner for an automobile engine described in any one of the above, comprising the following steps:

[0046] 1) Smelting: smelting Al source, Si source, C source, Mg source, Cr source, Cu source, Mn source, RE source, Zn source, Ti source into a melt;

[0047] 2) Die-casting: Die-casting the melt obtained in step 1) to obtain an aluminum alloy cylinder liner blank;

[0048] 3) Machining: the aluminum alloy cylinder liner blank obtained in the step 2) is sequentially subjected to rough turning, rough boring, turning process outer circle, fine boring and fine turning outer circle to obtain a tubular aluminum alloy substrate;

[0049] 4) Chromium electroplating: the inner surface of the aluminum alloy substrate obtained in the step 3) is sequentially cleaned with an organic solvent, degreased, soaked in heavy metal salts, pickled, zinc dipped once, zinc stripped, brightened, zinc dipped twi...

Embodiment 1

[0092] 1) Add a certain quality of pure aluminum ingots into the crucible, heat to 760°C, melt the pure aluminum ingots into a melt, and then add Al-Cr master alloy and Al-Cu master alloy to the melt in turn according to the ratio , Al-Mn master alloy, Al-RE master alloy, Al-Si master alloy, Al-Zn master alloy, Al-Ti master alloy, heat up to 840 ° C, keep warm for 6 hours, stir after the solid alloy is completely melted, turn on the electromagnetic Mixer, stir for 1 hour, and add 0.5% of the composite phosphorus modifier of the melt quality, then cool down to 760°C, add Al-C master alloy and Al-Mg master alloy according to the proportion, turn on the electromagnetic stirrer again, and stir For 1 hour, degas with nitrogen for 20 minutes, take a sample to test the composition of the melt, and control the melt to include the following components in weight percentage: Si: 13%; Cu: 2%; Mg: 0.2%; Cr: 0.1%; C : 0.3%; Mn: 0.1%; Zn: 0.5%; Ti: 0.02%; RE: 0.3%; A certain amount of melt ...

Embodiment 2

[0100]1) Add a certain quality of pure aluminum ingots into the crucible, heat to 770°C, melt the pure aluminum ingots into a melt, and then add Al-Cr master alloy and Al-Cu master alloy to the melt in turn according to the ratio , Al-Mn master alloy, Al-RE master alloy, Al-Si master alloy, Al-Zn master alloy, Al-Ti master alloy, heat up to 840 ° C, keep warm for 6 hours, stir after the solid alloy is completely melted, turn on the electromagnetic Mixer, stir for 1 hour, and add 0.5% of the composite phosphorus modifier of the melt quality, then cool down to 760°C, add Al-C master alloy and Al-Mg master alloy according to the proportion, turn on the electromagnetic stirrer again, and stir For 1 hour, degas with nitrogen for 20 minutes, take a sample to test the composition of the melt, and control the melt to include the following components in weight percentage: Si: 14%; Cu: 1.6%; Mg: 0.36%; Cr: 0.21%; C : 0.23%; Mn: 0.21%; Zn: 0.28%; Ti: 0.08%; RE: 0.19%; A certain amount o...

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Abstract

The invention discloses an aluminum alloy cylinder sleeve for an automobile engine. The aluminum alloy cylinder sleeve comprises a tubular aluminum alloy substrate and a chromium coated layer, wherein the chromium coated layer is arranged on the inner surface of the aluminum alloy substrate; the aluminum alloy substrate is prepared from the following aluminum alloys in percentage by weight: 13-15% of Si, 1-2% of Cu, 0.2-0.5% of Mg, 0.1-0.3% of Mn, 0.1-0.3% of Cr, 0.1-0.3% of C, 0-0.5% of Zn, 0-0.15% of Ti, 0.1-0.3% of RE and the balance of Al. The invention further provides a preparation method of the aluminum alloy cylinder sleeve for the automobile engine. By adopting the aluminum alloy cylinder sleeve, the strength, the hardness, the high temperature stability and the wearing resistance of a cylinder sleeve are improved, the use property of the aluminum alloy cylinder sleeve is improved, the service life of the aluminum alloy cylinder sleeve is prolonged, and requirements of a conventional engine can be met.

Description

technical field [0001] The invention relates to the technical field of the automobile industry, in particular to an aluminum alloy cylinder liner for an automobile engine and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards, the demand for automobiles is increasing, and the requirements for automobile performance are also getting higher and higher, which leads to the rapid development of the domestic automobile industry and the continuous improvement of the localization of auto parts. [0003] The cylinder of an automobile engine includes a cylinder block, a cylinder liner and a piston. At present, the cylinder liner is mostly made of cast iron, and the cylinder block has been made of aluminum alloy under the development trend of lightweight engine technology. Similarly, under the technical development trend of lightweight engines, cylinder liners made of aluminum alloy have also appeared. Although eng...

Claims

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Application Information

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IPC IPC(8): C22C21/02C25D3/08C25D5/44C25D5/50F02F1/00
CPCC22C21/02C25D3/08C25D5/44C25D5/50F02F1/004F02F2200/06F05C2201/903
Inventor 解居麟
Owner SHANDONG HUICHUAN AUTO PARTS
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