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Method for manufacturing hypereutectic aluminum-silicon alloy engine cylinder sleeve

An aluminum-silicon alloy and engine cylinder technology, which is applied in the field of aluminum alloy processing, can solve the problems of poor deformation ability of hypereutectic aluminum-silicon alloy, and achieve the effects of good machining performance, changing macro-segregation, and uniform and fine internal structure.

Active Publication Date: 2014-11-05
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method for manufacturing a hypereutectic aluminum-silicon alloy engine cylinder liner. cylinder liner

Method used

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  • Method for manufacturing hypereutectic aluminum-silicon alloy engine cylinder sleeve
  • Method for manufacturing hypereutectic aluminum-silicon alloy engine cylinder sleeve
  • Method for manufacturing hypereutectic aluminum-silicon alloy engine cylinder sleeve

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Effect test

Embodiment 1

[0024] The process steps of producing Al-20Si engine cylinder liner are as follows:

[0025] (1) Prepare aluminum alloy raw materials according to the weight ratio: 20wt% Si, 80wt% Al, smelt the above-mentioned aluminum alloy raw materials to obtain an aluminum alloy melt, and add 0.1wt% P and 0.7wt% of the melt weight to the aluminum alloy melt Cr, to modify the aluminum alloy melt;

[0026] (2) The modified aluminum alloy melt was poured into a crystallizer at 950°C for semi-continuous casting at a casting speed of 120mm / min to obtain a hollow aluminum alloy ingot with an inner hole size of 60mm and an outer diameter of 210mm ;

[0027] (3) The above-mentioned hollow aluminum alloy ingot was heated at 515°C for 2 hours at a high temperature, and then the temperature was raised to 578°C for semi-solid extrusion at a speed of 20mm / s;

[0028] (4) Machining the extruded aluminum alloy ingot to obtain a hypereutectic aluminum-silicon alloy engine cylinder liner product with an...

Embodiment 2

[0033] The process steps of producing A390 engine cylinder liner are as follows:

[0034](1) According to the weight ratio: 16wt% Si, 4wt% Cu, 0.5wt% Mg, 0.2wt% Fe, 0.05wt% Mn, 0.2wt% Zn, the balance is Al to prepare aluminum alloy raw materials, and the above-mentioned aluminum alloy raw materials are smelted Obtaining an aluminum alloy melt, adding 0.05% by weight of Cr to the aluminum alloy melt to modify the quality of the aluminum alloy melt;

[0035] (2) The modified aluminum alloy melt was poured into a crystallizer at 900°C for semi-continuous casting at a casting speed of 150mm / min to obtain a hollow aluminum alloy ingot with an inner hole size of 60mm and an outer diameter of 210mm ;

[0036] (3) The above-mentioned hollow aluminum alloy ingot was heated at 510°C for 4 hours at a high temperature, and then the temperature was raised to 550°C for semi-solid extrusion at a speed of 20mm / s;

[0037] (4) Carry out T5 heat treatment of on-line air-cooling and quenching ...

Embodiment 3

[0043] The process steps of producing Al-20Si-Fe-Ni engine cylinder liner are as follows:

[0044] (1) According to the weight ratio: 20wt% Si, 1wt% Fe, 1wt% Ni, the balance is Al to prepare aluminum alloy raw materials, smelting the above aluminum alloy raw materials to obtain aluminum alloy melt, and adding aluminum alloy melt to the aluminum alloy melt The weight is 0.01wt%P and 0.5wt%Cr, and the aluminum alloy melt is modified;

[0045] (2) The modified aluminum alloy melt was poured into a crystallizer at 950°C for semi-continuous casting at a casting speed of 100mm / min to obtain a hollow aluminum alloy ingot with an inner hole size of 60mm and an outer diameter of 210mm ;

[0046] (3) Heating the above-mentioned hollow aluminum alloy ingot at 600°C for 0.2 hours at high temperature, then controlling the temperature to 580°C, and performing semi-solid extrusion at a speed of 20mm / s;

[0047] (4) Carry out T5 heat treatment of on-line air-cooling and quenching to the alu...

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Abstract

The invention belongs to the technical field of processing of aluminum alloy, in particular to a method for manufacturing a hypereutectic aluminum-silicon alloy engine cylinder sleeve. The method for manufacturing the hypereutectic aluminum-silicon alloy engine cylinder sleeve comprises the following steps of: smelting 13 to 30 weight percent of Si and other main alloy elements, and the balance of aluminum alloy raw materials of which the aluminum content is more than or equal to 70 weight percent to obtain aluminum alloy melt; adding Cr or P and Cr into the melt and performing modification; pouring the aluminum alloy melt which is subjected to modification into a crystallizer and performing semi-continuous casting to obtain a hollow aluminum alloy ingot; heating the hollow aluminum alloy ingot at the high temperature of between 500 and 600 DEG C for 0.2 to 5 hours; then raising temperature and performing semi-solid extrusion; and finally machining to obtain the hypereutectic aluminum-silicon alloy engine cylinder sleeve. According to the hypereutectic aluminum-silicon alloy engine cylinder sleeve obtained by the method, the Si content is 13 to 30 weight percent, the internal texture is uniform and thin, Si particles are dispersively distributed, and the diameter of the Si particles is less than 5 microns; and the engine cylinder sleeve is high in machining property and meets the industrial standard.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a method for manufacturing a hypereutectic aluminum-silicon alloy engine cylinder liner. Background technique [0002] With the rapid development of my country's economic construction, the high consumption of resources and energy has become a hot spot that people pay more and more attention to. Correspondingly, the development and application of low energy consumption technologies and products is also called the development trend of the world today. According to the statistics of China Association of Automobile Manufacturers, my country produced 18.4189 million vehicles in 2011, a year-on-year increase of 0.8%, and sold 18.5051 million vehicles, a year-on-year increase of 2.5%. The development and application of the automobile industry are closely related to the three major issues of energy, environmental protection and safety. Although automobiles, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C22C21/02C22C1/02B22D17/00C22F1/043
Inventor 张海涛崔建忠秦克
Owner NORTHEASTERN UNIV LIAONING