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Surface-treated piston for internal combustion engine, and its preparing method

A surface treatment, internal combustion engine technology, applied in pistons, mechanical equipment, engine components, etc., to achieve the effects of high production efficiency, improved mechanical efficiency, and improved wear resistance

Active Publication Date: 2009-01-21
QUFU JINHUANG PISTON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Up to now, the successful application of this technology to the top of the piston has not been reported

Method used

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  • Surface-treated piston for internal combustion engine, and its preparing method
  • Surface-treated piston for internal combustion engine, and its preparing method
  • Surface-treated piston for internal combustion engine, and its preparing method

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Embodiment Construction

[0017] A surface-treated internal combustion engine piston, with a ceramic layer (2) on the top surface of the piston base (5) with a thickness of 0.08-0.15mm, and a MoS layer on the skirt (3) 2 The sprayed layer (4) has a thickness of 0.01-0.03mm.

[0018] The method for manufacturing the above-mentioned surface-treated internal combustion engine piston, including the piston top (1) ceramic layer (2) and the piston skirt (3) MoS 2 A method for producing the sprayed layer (4).

[0019] The ceramic layer (2) on the top of the piston (1) adopts a micro-arc oxidation process: first calculate the surface area of ​​the top of the piston, measure the thickness of the top of the piston and the size of the skirt profile in a constant temperature room, clean the surface of the piston, optimize various process parameters, and prepare a suitable The composition and composition of the oxidation solution, the pH value of the oxidation solution is 9-12, using deionized water, and is equipp...

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Abstract

The invention relates to an internal-combustion engine piston, concretely a surface-treated internal-combustion engine piston and the manufacturing method thereof, where its matrix is cast of aluminum alloy, its working surface comprises top and skirt, and it is characterized in that the top of its matrix is coated with a ceramic layer and the skirt is sprayed with a MoS2 layer. Generally, the ceramic layer is controlled at 0.08-0.15 mm thick; and the MoS2 layer is 0.01-0.03 mm thick. And its manufacturing method comprises: microarc oxidation process for the ceramic layer and manufacturing method of the MoS2 layer, where the manufacturing method of the MoS2 layer comprises the following steps of: piston surface washing- preheating-spraying-primary firing-secondary firing. And it largely improves high-temperature impact resistance, corrosion resistance, wearability and other synthetic properties.

Description

technical field [0001] The present invention relates to a piston of an internal combustion engine, and more particularly relates to the surface treatment of the piston of an internal combustion engine. Background technique [0002] The internal combustion engine piston requires high working temperature, large thermal shock, high speed and frequent friction. It is difficult for ordinary pistons (made of pure cast aluminum or aluminum alloy) to work under harsh working conditions, which has long restricted the improvement of the overall performance of the engine. . For this reason, scientific and technological personnel at home and abroad have implemented various measures: such as: "anodizing treatment", "ceramic treatment by plasma vapor deposition", "spraying polytetrafluoroethylene treatment", etc., eager to solve the above difficulties, but the result is only one-sided However, the above-mentioned difficulties have not been solved as a whole. [0003] Plasma micro-arc ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/10C25D11/04
Inventor 颜君衡张书民孔令东张鲁京宋文启孔德芬魏运财
Owner QUFU JINHUANG PISTON
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