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Valve guide pipe coated with ion nitriding layer

A technology of ion nitriding and valve guide, which is applied in the direction of lift valves, engine components, machines/engines, etc. It can solve the problems that the performance of valve guides cannot be fully satisfied, achieve good oil storage effect, increase service life, and high material utilization rate Effect

Inactive Publication Date: 2016-11-16
SUZHOU GENFU MACHINERY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With people's higher and higher requirements for automobile performance, a more powerful engine is needed to ensure it, which also requires high-performance engine accessories to cooperate, so the current valve guide performance cannot be fully satisfied and needs to be improved urgently

Method used

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  • Valve guide pipe coated with ion nitriding layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Described cobalt is 1.3 parts;

[0035] Described nickel is 1.6 parts;

[0036] Described manganese disulfide is 2.2 parts;

[0037] Described sulfur is 0.6 part;

[0038] Described iron is 92 parts;

[0039] The other substances mentioned are 1.3 parts;

[0040] The number of parts mentioned is the number of parts by mass;

[0041] The thickness of the ion nitride layer is 40 microns;

[0042] The hardness of the ion nitrided layer is 645HRC.

Embodiment 2

[0044] Described cobalt is 1.4 parts;

[0045] Described nickel is 1.8 parts;

[0046] Described manganese disulfide is 2.4 parts;

[0047] Described sulfur is 0.5 part;

[0048] Described iron is 91 parts;

[0049] The other substances mentioned are 1.2 parts;

[0050] The number of parts mentioned is the number of parts by mass.

[0051] The thickness of the ion nitride layer is 40 microns.

[0052] The hardness of the ion nitrided layer is 700HRC.

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Abstract

The invention discloses a valve guide pipe coated with an ion nitriding layer. The valve guide pipe comprises an iron-based powder matrix and the ion nitriding layer, wherein the iron-based powder matrix comprises cobalt, nickel, manganese disulfide, phosphorus, sulfur, iron and other matter; and the iron-based powder matrix is coated with the ion nitriding layer. The iron-based powder matrix is prepared through powder metallurgy pressing and sintering, the sintering temperature is low, and the utilization rate of materials is high. The cobalt, the nickel, the manganese disulfide, the phosphorus and the sulfur contained in the iron-based powder matrix achieve the good oil storage effect and good self-lubrication performance. Meanwhile, the ion nitriding layer coating the iron-based powder matrix achieves the abrasion resistance and high temperature resistance, and prolongs the service life. More importantly, the valve guide pipe coated with the ion nitriding layer has the excellent performance and can meet the higher and higher requirements for engines on the market.

Description

technical field [0001] The invention relates to the field of automobile engine spare parts, in particular to a valve guide. Background technique [0002] The valve guide is the guide device for the valve of the automobile engine, which guides the valve and transfers the heat on the valve stem to the cylinder head through the valve guide. The engine valve guide is a separate part, and the valves are divided into intake valves and exhaust valves. The ducts are divided into intake and exhaust valve ducts. The inner and outer cylindrical surfaces of the valve guide are processed and pressed into the valve guide hole of the cylinder head or cylinder block, and then the inner hole is reamed. In order to prevent axial rotation, a snap ring positioning groove is provided, which cooperates with the positioning snap ring It can prevent the guide tube from moving and falling into the cylinder during work. Generally, there is a slight gap between the valve stem and the valve guide, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/08F01L3/04
CPCF01L3/08F01L3/04
Inventor 朱宝华
Owner SUZHOU GENFU MACHINERY SCI & TECH
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