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Low-heat-dissipation motorcycle engine manufacturing method

A technology for motorcycles and engines, applied in metal material coating process, fusion spraying, coating and other directions, can solve the problems of simultaneous coating of cylinder heads, easy peeling of ceramic layers, poor thermal shock performance of pure ceramic parts, etc.

Active Publication Date: 2017-08-11
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are several problems in the existing low heat dissipation motorcycle thermal insulation coating: first, the existing low heat dissipation engine focuses on the preparation of pure ceramic parts, and pure ceramic parts have disadvantages such as poor thermal shock performance and high cost, which are difficult to meet Batch production; Second, when some low heat dissipation engines are preparing heat-insulating coatings, due to technical limitations, only the pistons in the engine are coated with heat-insulating coatings, and the cylinder head and cylinder block are not coated at the same time. Therefore, The heat insulation effect of the engine is limited; the third is that when the existing technology is used to coat the piston with a heat insulation coating, the choice of coating material is unreasonable, and the preparation method is not appropriate. For example, when preparing MCrAlX alloy material as a transition layer, the alloy coating is more oxidized. Severe, causing the ceramic layer to peel off easily during service

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, the piston, cylinder head, and cylinder block of the motorcycle engine are ultrasonically cleaned with gasoline and alcohol in sequence. After cleaning, the non-sprayed area is pasted and protected with high-temperature tape, and the sprayed area is sprayed with No. 40 corundum grit at 0.3 MPa. Sand treatment, and use high-pressure air to blow off the residual gravel; then spray the bonding layer on the top surface of the piston, the inner surface of the cylinder head, and the outer surface of the cylinder body. The thickness of the layer is controlled at 50 μm, and the spraying parameters are: aviation kerosene flow rate 700L / min, oxygen flow rate 600L / min, powder feeding rate 25g / min, spraying distance 140mm; the outer surface of the cylindrical cylinder is bonded by atmospheric plasma spraying NiCrAl Layer, the thickness is controlled at 50μm, and the Laval nozzle plasma spray gun is used for spraying. The spraying parameters are: current 500A, argon gas flow r...

Embodiment 2

[0021] First, the piston, cylinder head, and cylinder block of the motorcycle engine are ultrasonically cleaned with gasoline and alcohol in sequence. After cleaning, the non-sprayed area is pasted and protected with high-temperature tape, and the sprayed area is sprayed with No. 40 corundum grit at 0.3 MPa. Sand treatment, and use high-pressure air to blow off the residual gravel; then spray the bonding layer on the top surface of the piston, the inner surface of the cylinder head, and the outer surface of the cylinder body. The thickness of the layer is controlled at 100μm, and the spraying parameters are: aviation kerosene flow rate 900L / min, oxygen flow rate 850L / min, powder feeding rate 40g / min, spraying distance 160mm; the outer surface of the cylindrical cylinder is bonded by atmospheric plasma spraying NiCrAl Layer, the thickness is controlled at 100μm, and the Laval nozzle plasma spray gun is used for spraying. The spraying parameters are: current 550A, argon flow rate...

Embodiment 3

[0023] First, the piston, cylinder head, and cylinder block of the motorcycle engine are ultrasonically cleaned with gasoline and alcohol in sequence. After cleaning, the non-sprayed area is pasted and protected with high-temperature tape, and the sprayed area is sprayed with No. 40 corundum grit at 0.3MPa Sand treatment, and use high-pressure air to blow off the residual gravel; then spray the bonding layer on the top surface of the piston, the inner surface of the cylinder head, and the outer surface of the cylinder body. The thickness of the layer is controlled at 60μm, and the spraying parameters are: aviation kerosene flow rate 800L / min, oxygen flow rate 650L / min, powder feeding rate 30g / min, spraying distance 150mm; the outer surface of the cylindrical cylinder is bonded by atmospheric plasma spraying NiCrAl Layer, the thickness is controlled at 60μm, and the Laval nozzle plasma spray gun is used for spraying. The spraying parameters are: current 525A, argon gas flow rate...

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PUM

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Abstract

The invention relates to a low-heat-dissipation motorcycle engine manufacturing method. The manufacturing method includes the following steps that a piston, an air cylinder cover and an air cylinder body of an engine are subject to ultrasonic cleaning, and a spraying zone is subject to sand blasting through No.40 corundum gravels after washing is finished; a low temperature high velocity flame spraying is adopted for spraying the top surface of the piston and the inner surface of the air cylinder cover to form NiCoCrAlYTa bonding layers, and atmospheric plasma spraying is adopted for spraying the outer surface of the air cylinder body to form a NiCrAl bonding layer; and after the bonding layers are formed through spraying, the top surface of the piston, the inner surface of the air cylinder cover and the outer surface of the air cylinder body are subject to 7YSZ ceramic layer atmosphere plasma spraying. By means of the manufacturing method, through compounding of a ceramic material and a metal material, advantages of the two kinds of materials can be integrated, the defect that in the prior art, a view is given to manufacture pure ceramic engine parts is overcome, and therefore a motorcycle engine which is low in cost, high in heat isolation, resistant to oxidation, resistant to corrosion and long in service life is obtained.

Description

technical field [0001] The invention relates to the technical field of motorcycle engine surface treatment, in particular to a method for preparing a low-radiation motorcycle engine. Background technique [0002] Low heat dissipation engine has always been a research hotspot in the motorcycle engine industry. Low heat dissipation technology is a high-tech in a multidisciplinary field. One of the difficulties lies in the selection of engine preparation technology and materials used. The engine is the heart of the motorcycle, and the development of the motorcycle is closely related to the progress of the engine. As society progresses day by day, motorcycle engines must face the challenges of low carbon emissions and energy saving and fuel reduction, so low heat dissipation engines are the future development trend. At present, the development direction of the engine is mainly towards high power, high speed, low fuel consumption, and low emission. With the gradual improvement o...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/134C23C4/073C23C4/11
Inventor 张小锋周克崧邓春明宋进兵邓畅光刘敏毛杰张吉阜杨焜徐丽萍陈志坤曾威
Owner GUANGDONG INST OF NEW MATERIALS
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