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Manufacturing method for high-strength composite coating piston ring for internal combustion engine

A composite coating, internal combustion engine technology, applied in the directions of piston rings, coatings, mechanical equipment, etc., can solve the problems of insufficient bonding strength between the coating and the substrate, easy to peel off, etc. Wear-resistant effect

Inactive Publication Date: 2016-12-14
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-strength 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%, Nb: 0.2%, W: 0.5%, Ni: 1.0%, Si: 0.5%, B: 0.3% , the balance is Fe, mix the above raw materials for 1 hour, put them into a mold and press them into a billet at 500 MPa, heat-preserve at 400°C for 1 hour, sinter at 1000°C for 1.5 hours under inert gas protection conditions, and grind them 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: 20-50 μm silicon nitride 5, 20-50 μm aluminum oxide 3, 0.3% polyvinyl alcohol solution 30, silane coupling agent KH-560 0.3, nickel powder 2, tungsten powder 1, weigh the above raw materials by weight, first mix silicon nitride, aluminum ox...

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PUM

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Abstract

The invention discloses a manufacturing method for a high-strength composite coating piston ring for an internal combustion engine. The manufacturing method comprises the specific steps that a base body of the piston ring is prepared, a coating material is prepared, and a coating is applied to the surface of the base body through an atmospheric plasma technology, wherein the piston ring base body comprises, by weight percentage, 0.3-0.5% of C, 0.2-0.5% of Nb, 0.5-1% of W, 1.0-1.5% of Ni, 0.5-1% of Si, 0.3-0.5% of B and the balance Fe. The piston ring has high abrasion resistance and high damage resistance, meanwhile bonding strength of the coating and the base body is high, the coating is not likely to peel off, and meanwhile the coating is high in mechanical strength, good in durability 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-strength 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 mainl...

Claims

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Application Information

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IPC IPC(8): C22C38/08C22C38/12C22C38/02C22C33/02B22F5/02C23C4/06C23C4/134F02F5/00
CPCB22F5/02C22C33/0264C22C38/02C22C38/08C22C38/12C22C38/32C23C4/06F02F5/00F05C2201/0448F05D2230/22F05D2230/312
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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