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Preparation method of coating for repairing surface of diesel engine cylinder cover

A diesel engine and cylinder head technology, which is applied in the field of coating preparation for repairing the surface of the diesel engine cylinder head, can solve the problems of increased manufacturing cost of the cylinder head, complex vibration damping structure of the cylinder head, etc., and achieves low void ratio and excellent thermal fatigue resistance , Excellent thermal fatigue resistance

Inactive Publication Date: 2018-11-23
如皋市欧马机械制造有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

The vibration damping structure of the cylinder head is complicated, and changing the structure of the cylinder head involves chain inner walls, outer walls, threaded holes and connecting holes, etc., which will increase the manufacturing cost of the cylinder head

Method used

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Embodiment Construction

[0009] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0010] The invention provides a method for preparing a coating for repairing the surface of a diesel engine cylinder head, which is formed on the surface of a substrate by mixed powder, which includes nickel-chromium-borosilicate powder, molybdenum powder and cerium oxide powder; the nickel-chromium The mass ratio of borosilicate powder, molybdenum powder and ceria powder is 9:2:5; the particle size of the nickel-chromium borosilicate powder is controlled at 60-130 μm, and the particle size of the molybdenum powder is controlled at 50-120 μm; the mixed powder is Cladding is performed on the surface of the substrate to obtain ...

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PUM

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Abstract

The invention provides a preparation method of a coating for repairing the surface of a diesel engine cylinder cover. The method comprises the step that the surface of a substrate is covered with a powder mixture through fusion, so that the nickel-based composite coating is obtained. The powder mixture comprises nickel-chromium-boron-silicon powder, molybdenum powder and cerium dioxide powder. Thenickel-based composite coating is excellent in thermal fatigue resistance and can be applied to preparation and repair of workpieces conveniently. Furthermore, compared with existing composite coatings, the coating is preferentially prepared through plasma fusion covering; the coating is generally applied to the gray pig iron gray pig iron; nickel-based alloy can be tightly bonded to the substrate, in addition, the void ratio is low, and bonding performance is extremely good; and grinding and polishing can be conducted easily to achieve the quite low surface roughness, and it is especially important that the thermal fatigue resistance is more excellent.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a coating preparation method for repairing the surface of a cylinder head of a diesel engine. Background technique [0002] Diesel engines of different models have the same basic requirements for the cylinder head, namely: wear resistance, corrosion resistance, and sufficient mechanical strength. The wear of the diesel engine during use includes: the mechanical movement of the valve and the adhesion of carbon deposits during the service of the cylinder head can cause the wear of the seat ring and the pipe; The stress concentration in some parts will cause cracks and lead to the scrapping of parts. The cylinder head adopts the combination structure of the body and the exhaust valve body, and the lower end of the fastening bolt of the exhaust valve body is planted on the cylinder head body. When installing the tightening bolts of the exhaust valve body, the shoulder of the cylin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 陈修玲
Owner 如皋市欧马机械制造有限公司
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