Metal composite ceramic cylinder sleeve and ceramic infiltration method thereof

A metal composite and cylinder liner technology, which is applied in the metal material coating process, cylinder, cylinder head, etc., can solve the problems of large gap between the inner wall of the cylinder liner and the piston ring, overheating of the metal surface, damage to the base material, etc., and achieve metal composite The ceramic cylinder liner composite membrane has a firm structure, high precision in the size and shape of the inner circle, and the effect of reducing emission pollution

Inactive Publication Date: 2014-06-25
江苏爱吉斯海珠机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The cylinder liner is the core component of the engine. Its inner surface is directly affected by high-temperature and high-pressure gas, and it always has high-speed sliding friction with the piston ring and piston skirt, and wears quickly, causing the gap between the inner wall of the cylinder liner and the piston ring to become large prematurely. , resulting in reduced engine power, difficulty in starting, increased fuel consumption, and excessive emissions
In order to make the cylinder liner wear-resistant and wear-reducing under the harsh environment of high temperature and high pressure, people carry out infiltration treatment on the inner surface of the cylinder liner. The similar technology at home and abroad uses flame spraying method or high-temperature plasma spraying method to spray ceramic powder on the metal surface. The disadvantage is that the thermal expansion coefficients of ceramics and metals are too different, and the coating is prone to peeling off. In addition, the high-temperature ceramic powder will cause local overheating of the metal surface during spraying and damage the base material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The inner surface of the cylinder liner is attached with composite thin-film ceramics, and a new type of material is formed on the metal surface through mutual diffusion between the thin-film ceramics and the base material of the cylinder liner. A network and a particle structure are formed in the ceramic film-metal composite film, the two structures coexist, and the microcrystalline particles are distributed in the network. The base material of the cylinder liner is ordinary boron cast iron; the ceramic thin film is BN-SiN, and its molecular structure is hexagonal crystal structure, which has self-lubricating property. The friction coefficient of the inner surface of the cylinder liner after potting is 0.128, and the hardness of the inner surface of the cylinder liner is HV310. The ceramic film layer is 3 microns, and the infiltration depth is 35 microns. The metal and ceramic elements diffuse bidirectionally, and the composite film structure is firm and ...

Embodiment 2

[0034] Embodiment 2: The inner surface of the cylinder liner is attached with composite thin film ceramics, and a new type of material is formed on the metal surface through mutual diffusion between the thin film ceramics and the base material of the cylinder liner. A network and a particle structure are formed in the ceramic film-metal composite film, the two structures coexist, and the microcrystalline particles are distributed in the network. The base material of the cylinder liner is ordinary boron cast iron; the ceramic thin film is BN-SiN, and its molecular structure is hexagonal crystal structure, which has self-lubricating property. The friction coefficient of the inner surface of the cylinder liner after infiltration is 0.124, and the hardness of the inner surface of the cylinder liner is HV315. The ceramic film layer is 6 microns, and the infiltration depth is 55 microns. The metal and ceramic elements diffuse bidirectionally, and the composite film structure is firm...

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Abstract

The invention discloses a metal composite ceramic cylinder sleeve. Composite film ceramic is attached to the inner surface of the cylinder sleeve, and new material is formed on the metal surface through interdiffusion between the film ceramic and a cylinder sleeve base body material. A ceramic film is BN-SiN, the molecular structure of the ceramic film is of a hexagonal crystal structure and has self-lubrication performance, after ceramic infiltration, the friction coefficient of the inner surface of the cylinder sleeve is reduced to one sixth, and the hardness is improved by 41%. The thickness of the ceramic film layer is 3 micrometers -6 micrometers, and the infiltration depth is 35 micrometers-55 micrometers; and the ceramic composite film grows in the environment at the low temperature of 255 DEG C-265 DEG C. The composite film structure of the metal composite ceramic cylinder sleeve is firm and can not fall off, the inner surface of the cylinder sleeve is resistant to abrasion and high temperature and small in friction coefficient, so that engine power is improved, oil consumption is reduced, and emission pollution is reduced.

Description

technical field [0001] The invention relates to a metal-composite ceramic cylinder liner and its infiltration method, in particular to obtaining a metal-ceramic composite layer on the inner surface of the engine cylinder liner by using low-temperature plasma chemical vapor deposition technology and its implementation method. Background technique [0002] The cylinder liner is the core component of the engine. Its inner surface is directly affected by high-temperature and high-pressure gas, and it always has high-speed sliding friction with the piston ring and piston skirt, and wears quickly, causing the gap between the inner wall of the cylinder liner and the piston ring to become large prematurely. , resulting in reduced engine power, difficulty in starting, increased fuel consumption, and excessive emissions. In order to make the cylinder liner wear-resistant and wear-reducing under the harsh environment of high temperature and high pressure, people carry out infiltration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/00C23C16/34C23C16/44C23C16/513
Inventor 王明泉高金刚张加中刘久万戚娟娟
Owner 江苏爱吉斯海珠机械有限公司
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