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High temperature-resistant light aluminum alloy piston for internal combustion engines and preparation method thereof

An aluminum alloy, high temperature resistant technology, applied in the direction of pistons, mechanical equipment, engine components, etc., can solve the problems of poor heat resistance, insufficient thickness of oxide film, deterioration of friction and wear of related moving pairs, etc., to achieve not easy to fall off, anti burning Excellent corrosion resistance and excellent heat insulation effect

Inactive Publication Date: 2020-02-04
GUANGXI YUCHAI MASCH CO LTD
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  • Abstract
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Problems solved by technology

[0006] The object of the present invention is to provide a high-temperature-resistant light-weight aluminum alloy piston for an internal combustion engine, which solves the problems of large motion inertia caused by high density of steel pistons, high pressure bearing on piston pin holes, and deterioration of friction and wear of related kinematic pairs. Influence; At the same time, it also solves the Al 2 o 3 Insufficient oxide film thickness and poor heat resistance

Method used

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  • High temperature-resistant light aluminum alloy piston for internal combustion engines and preparation method thereof

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Embodiment Construction

[0021] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0022] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0023] The principle of the micro-arc oxidation surface treatment process is: the aluminum alloy is placed in the electrolyte, and after the electricity is turned on, a very thin layer of amorphous Al is immediately formed on the surface of the alloy. 2 o 3 Oxide film. When the voltage applied to the aluminum alloy exceeds a certain critical value, this layer of Al 2 o 3 Some weak links in the oxidation are broken down,...

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Abstract

The invention discloses a high temperature-resistant light aluminum alloy piston for internal combustion engines and a preparation method thereof. A groove for forming a part of a combustion chamber is formed in the top of the high temperature-resistant light aluminum alloy piston; and the top surface of the high temperature-resistant light aluminum alloy piston and the groove undergo surface treatment by adoption of a high-voltage micro-arc oxidation surface treatment process so as to form ceramic membranes with thicknesses of 70-160 microns. The high temperature-resistant light aluminum alloy piston is capable of solving the negative influences such as large movement inertia, large piston pin hole bearing pressure, related kinematic pair frictional wear deterioration and the like causedby relatively high steel piston density, and solving the problem that the Al2O3 oxide films generated by the anodized illuminant alloy pistons are insufficient in thickness and weak in heat resistance.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a high-temperature resistant light aluminum alloy piston of an internal combustion engine and a preparation method thereof. Background technique [0002] With the upgrading of engine emission regulations, the temperature and explosion pressure of the combustion chamber of internal combustion engines are getting higher and higher, especially for internal combustion engines fueled by natural gas. Aluminum alloy pistons are the most widely used in previous internal combustion engines. The use of anodic oxidation surface treatment process is one of the ways to improve the heat resistance of the top of the aluminum alloy piston. This process makes the combustion chamber and top surface of the aluminum alloy piston form a layer of amorphous Al. 2 o 3 oxide layer to improve its heat resistance. But the Al produced by this process 2 o 3 Oxide film, the film thickness is relatively sm...

Claims

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Application Information

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IPC IPC(8): C25D11/06C25D11/24C22C21/02F02F3/00
CPCC25D11/06C25D11/026C25D11/246C22C21/02F02F3/0084
Inventor 钟韬黄传刚苏怀林张锦
Owner GUANGXI YUCHAI MASCH CO LTD
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