Self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and preparation method thereof

A particle-reinforced aluminum and particle-reinforced technology, which is applied to cylinders, cylinder heads, mechanical equipment, etc., can solve the problem that there are no reports of graded functional materials in centrifugal casting of Al-Ni-Si ternary alloys, and the hardness and wear resistance are not high. , Difficulties in practical application, etc., to achieve the effect of light weight, low production cost, and simple manufacturing process

Inactive Publication Date: 2012-02-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the hardness and wear resistance of the material are not high
[0011] In addition, the process of this two-cast centrifugal casting method is very difficult, and the practical application is very difficult
[0012] In addition, there is no report on centrifugally casting graded functional materials of Al-Ni-Si ternary alloys

Method used

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  • Self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and preparation method thereof
  • Self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and preparation method thereof
  • Self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The reinforcement layer forms the wall thickness of the cylinder liner, and the primary Al on the inner surface of the cylinder liner 3 The total volume percentage of Ni and primary Si reinforcing particles is 15%. In nascent Al 3 In the mixed reinforced particles of Ni and primary Si, the primary Al 3 Ni particles account for 70% by relative volume percentage.

Embodiment 2

[0042] The reinforcement layer forms the wall thickness of the cylinder liner, and the primary Al on the inner surface of the cylinder liner 3 The total volume percentage of Ni and primary Si reinforced particles is 30%, and the primary Al 3 In the mixed reinforced particles of Ni and primary Si, the primary Al 3 Ni particles account for 70% by relative volume percentage. In this embodiment, the percentage content of reinforcing particles makes the heat resistance and wear resistance of the cylinder liner better than that of Embodiment 1.

Embodiment 3

[0044] The reinforcement layer forms the wall thickness of the cylinder liner, and the primary Al on the inner surface of the cylinder liner 3 The total volume percentage of Ni and primary Si reinforced particles is 40%, and the primary Al 3 In the mixed reinforced particles of Ni and primary Si, the primary Al 3 Ni particles account for 70% by relative volume percentage. This embodiment strengthens the primary Al in the particles 3 The volume percentage of Ni particles makes the heat resistance and wear resistance of the cylinder liner better than that of Example 2.

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Abstract

The invention discloses a self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and a preparation method thereof. The self-generated mixed particle-reinforced aluminum alloy cylinder sleeve comprises an aluminum alloy and certain amounts of Ni and Si. The preparation method of the self-generated mixed particle-reinforced aluminum alloy cylinder sleeve comprises the following steps that in alloy solidification, Al3Ni particles first separated out from melt can push a part of Si primary crystal particles to move outward with the Al3Ni particles under the action of a centrifugal force; a cannular blank casting is obtained, wherein the cannular blank casting has an outer segregation layer containing a mass of primary Al3Ni and Si primary crystal mixed particles, an inner segregation layer containing Si primary crystal particles, and a middle base layer; and the inner segregation layer and the middle base layer of the cannular blank casting are removed by turning and the outer segregation layer having a high volume fraction is left so that the self-generated mixed particle-reinforced aluminum alloy cylinder sleeve is obtained. The self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and an aluminum cylinder can be subjected to compression casting assembly molding and then are processed into an all-aluminum internal-combustion engine through machining and assembling. The self-generated mixed particle-reinforced aluminum alloy cylinder sleeve has light weight, high particle volume percentage content and excellent wear resistance and high-temperature resistance, and can improve engine work efficiency.

Description

technical field [0001] The invention relates to an engine cylinder component, in particular to a self-generated mixed particle reinforced aluminum alloy cylinder liner and a manufacturing method thereof. Background technique [0002] The cylinder liner is one of the important parts of the internal combustion engine, and its inner surface is easily worn due to the action of high-temperature and high-pressure gas and contact with the high-speed moving piston. Therefore, the mechanical properties and high-temperature thermal properties of the cylinder liner have an important impact on the working efficiency, service life and working state of the engine. [0003] In recent years, the technical development of aluminum alloy cylinder liners has become an important topic. Among the existing technologies, there are high-silicon aluminum alloy cylinder liner spray metallurgy, aluminum alloy cylinder inner surface coating treatment process and centrifugal casting method to prepare Al-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02B22D13/04F02F1/00
Inventor 刘昌明吕循佳李婧
Owner CHONGQING UNIV
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