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Method for arranging Mo2FeB2 metal-ceramic coating on conical surface of carbon steel synchronizer ring gear

A technology of cermet coating and synchronizer gear ring, which is applied in the direction of metal material coating process, coating, and components with teeth, etc., can solve the problem that the friction performance is difficult to be guaranteed, the bonding strength of the coating and the substrate is not high, High manufacturing cost and other problems, to achieve excellent wear resistance, improve wear resistance, and the effect of strong coating bonding

Inactive Publication Date: 2011-08-17
GUILIN XINGHUO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, carbon steel synchronizer rings were thermally sprayed with a layer of Mo on the cone surface, but the manufacturing cost of the synchronizer rings manufactured by this method was very high, and the bonding strength between the coating and the substrate was not high, so its friction performance hard to guarantee

Method used

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  • Method for arranging Mo2FeB2 metal-ceramic coating on conical surface of carbon steel synchronizer ring gear
  • Method for arranging Mo2FeB2 metal-ceramic coating on conical surface of carbon steel synchronizer ring gear
  • Method for arranging Mo2FeB2 metal-ceramic coating on conical surface of carbon steel synchronizer ring gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Synchronizer ring base material: carbon steel

[0020] Set Mo on the conical surface of the above substrate 2 FeB 2 The method of cermet coating is as follows:

[0021] (1) Degrease and sandblast the tapered surface of the synchronizer ring base first, then

[0022] (2) Thermal spraying:

[0023] The mass percentage of spray powder composition is: 35% FeB, 40% Mo, 2% Ni, 3% Cr, 20% Fe; the powder particle size is 10 μm; it is made by mixing evenly, and is heated on the cone surface of the substrate by oxygen-acetylene flame method. Spraying; oxygen-acetylene flame spraying process parameters: spraying distance is 100mm, spraying angle is 80°~90°, spray gun moving speed is 15cm / s, each spraying thickness is 0.05-0.10mm, and the total coating thickness is 0.15mm;

[0024] (3) Process parameters of high-frequency induction heating coating: heating temperature: 900°C.

[0025] Mo of this example 2 FeB 2 The microstructure of the cermet coating is as figure 1 shown; ...

Embodiment 2

[0028] The mass percentage of spray powder composition is: 25% FeB, 50% Mo, 3% Ni, 4% Cr, 18% Fe; powder particle size 15μm;

[0029] Plasma spraying process parameters: the spraying distance is 150mm, the spraying angle is 80°~90°, the moving speed of the spray gun is 15cm / s, the thickness of each spraying is 0.05-0.10mm, and the total coating thickness is 0.20mm;

[0030] High-frequency induction heating coating process parameters: Heating temperature: 1000°C.

[0031] All the other are with embodiment 1.

Embodiment 3

[0033] The mass percentage of spray powder composition is: 40% FeB, 35% Mo, 5% Ni, 5% Cr, 15% Fe; powder particle size 20μm;

[0034] Supersonic flame spraying process parameters: the spraying distance is 100mm, the spraying angle is 80°~90°, the moving speed of the spray gun is 15cm / s, the thickness of each spraying is 0.05-0.10mm, and the total thickness of the coating is 0.20mm;

[0035] High-frequency induction heating coating process parameters: Heating temperature: 1100°C.

[0036] All the other are with embodiment 1.

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Abstract

The invention provides a method for arranging a Mo2FeB2 metal-ceramic coating on the conical surface of a carbon steel synchronizer ring gear. The mass percents of the composites of thermal spraying powder are: 25%-40% of FeB, 35%-50% of Mo, 1%-10% of Ni, 1%-10% of Cr and 10%-20% of Fe, with the total percent of all the components being 100%; the granularity of the powder is 5-20 mum; and the technological parameters of thermal spraying are: spraying distance being 80-200mm, spraying angle being 80-90 degrees, movement speed of spray gun being 10-30cm / s, spraying thickness for each time being0.05-0.10mm and the total thickness of the coating being 0.1-1.0mm. After the coating is treated with high frequency induction heating at the temperature of 900-1100 DEG C, metal atoms melted in the coating recrystallize along the matrix surface to generate a metallurgical binding area and form a metallurgical binding interface; and the Mo2FeB2 metal-ceramic coating obtained has hardness being more than 1200HV, bonding strength being more than 200 MPa, and excellent wear-resisting property.

Description

technical field [0001] The invention relates to a cone surface of an automobile synchronizer gear ring, in particular to setting Mo on the cone surface of a carbon steel synchronizer gear ring. 2 FeB 2 Methods of cermet coating. Background technique [0002] Automobile synchronizer is a kind of assembly in automobile transmission. It is widely used in mechanical automobile transmission due to its advantages of reliable gear shifting, simple structure and low manufacturing cost. It is an indispensable and important part of automobile gear shifting. As the main part, the synchronizer ring needs to have good toughness, friction and high temperature resistance. In the past, carbon steel synchronizer rings were thermally sprayed with a layer of Mo on the cone surface, but the manufacturing cost of the synchronizer rings manufactured by this method was very high, and the bonding strength between the coating and the substrate was not high, so its friction performance Difficult t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/18C23C4/12F16H55/02F16H55/06C23C4/129C23C4/134
Inventor 李岩
Owner GUILIN XINGHUO MACHINERY