Preparation method for piston rings with high-lubricity composite coatings for internal combustion engines

A composite coating and internal combustion engine technology, which is applied to piston rings, coatings, mechanical equipment, etc., can solve the problems of easy peeling, insufficient bonding strength between the coating and the substrate, etc. Good effect of layer lubricity

Inactive Publication Date: 2016-11-09
安庆市德奥特汽车零部件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problem that the bonding strength between the coating and the substrate is not enough, and it is prone to peeling off, which needs to be improved in practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A preparation method for a high-lubrication composite coating internal combustion engine piston ring, the method comprises the following specific steps:

[0013] (1) Cast piston ring matrix, the weight percentage of each chemical composition of the piston ring matrix is ​​as follows: C 0.3%, Si: 0.5%, Mn: 0.5%, Pb: 0.3%, Cu: 0.3%, Ce: 0.05% , Co: 0.05%, the balance is Fe, mix the above raw materials for 1h, put them into a mold and press them into a billet at 500MPa, heat preservation at 400°C for 1h, then sinter at 1000°C for 1.5h under inert gas protection conditions, and grind after cooling , to obtain the piston ring matrix;

[0014] (2) Prepare the coating material, which is prepared from the following raw materials in parts by weight: 0.3% polyvinyl alcohol solution 30, 20-50 μm silicon nitride 5, 20-50 μm calcium fluoride 3, tungsten powder 2 , titanium powder 1, silane coupling agent KH-560 0.3, nanometer lanthanum oxide 0.5, take the above raw materials by wei...

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PUM

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Abstract

The invention discloses a preparation method for piston rings with high-lubricity composite coatings for internal combustion engines. The preparation method specifically includes the steps of preparing base bodies of the piston rings, preparing materials of the coatings and applying the coatings to the surfaces of the base bodies through the air plasma technology. The base bodies of the piston rings comprise, in mass percentage, 0.3-0.5% of C, 0.5-1% of Si, 0.5-1% of Mn, 0.3-0.5% of Pb, 0.3-0.5% of Cu, 0.05-0.1% of Ce, 0.05-0.1% of Co and the balance Fe. The piston rings have high wear resistance and high damage resistance, the bonding strength of the coatings and the base bodies is high, and the coatings do not peel off easily. In addition, the coatings are good in lubricity, high in sealing property and long in service life.

Description

technical field [0001] The invention relates to a preparation method of a piston ring, in particular to a preparation method of a high-lubrication composite coating internal combustion engine piston ring. Background technique [0002] Piston ring is one of the key components of the internal combustion engine. It is a split ring with certain elasticity. It is divided into gas ring and oil ring. The movement conditions of the piston ring are complex, and are often in harsh working environments, so they need to have good wear resistance, corrosion resistance and mechanical properties. With the development of the engine towards high efficiency, high load, high speed and long life, higher requirements are put forward for the durability and reliability of piston rings. [0003] Most of the current piston ring materials are ductile iron and steel, which have poor wear resistance and damage resistance, so surface treatment is required. The current surface treatment technologies ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/60C22C38/16C22C38/10C22C33/02C23C4/06C23C4/134F02F5/00
CPCC22C33/0264C22C38/005C22C38/02C22C38/04C22C38/10C22C38/16C22C38/60C23C4/06F02F5/00F05D2230/22F05D2230/312F05D2300/171
Inventor 梁立
Owner 安庆市德奥特汽车零部件制造有限公司
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