Enamel powder, metal component having a surface portion provided with an enamel coating and method for producing such a metal component

A metal component, enamel powder technology, applied in the field of manufacturing the metal component, to achieve the effect of preventing further damage, and withstand thermal and mechanical loads reliably

Active Publication Date: 2016-05-04
NEMAK S A B DE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A particular challenge arises in the practical use of this concept in that, on the one hand, the coating must ensure that it withstands the mechanical and thermal loads that occur during operation and, on the other hand, it must allow the sections of the individual components that adjoin the coated surface sections to Machining without risk of peeling coating

Method used

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  • Enamel powder, metal component having a surface portion provided with an enamel coating and method for producing such a metal component

Examples

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Embodiment Construction

[0066] The cylinder head 1 of a gasoline or diesel engine cast from an aluminum material normally used for this purpose, such as an aluminum-silicon 11 alloy, has a flat contact surface 2, with which the cylinder head is inserted, if necessary, through it during use. A cylinder head gasket, not shown at , is located on the engine block of the respective internal combustion engine, also not shown. The internal combustion engine has sequentially arranged combustion chambers and a vertically moving piston, likewise not shown here.

[0067] In the contact surface 2, the number of cylinders of the internal combustion engine corresponds to the number of dome-shaped recesses 3 formed, which form the upper end cover of the combustion chamber of the internal combustion engine in the upward direction of the piston of the internal combustion engine.

[0068] In each of the recesses 3 is opened an intake opening 5 extending from the long side 4' of the cylinder head 1, through which the c...

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Abstract

According to the invention, an enamel powder for producing a coating that is able to withstand high mechanical and thermal stresses and is simultaneously easily workable is provided as a mixture containing 100 parts of a glass powder, optionally 10-22 parts of coarse glass grains that are larger than the glass powder particles, 0.1-7.5 parts of ceramic fibres, glass fibres or carbon fibres, and as alternatives to one another or in combination with one another, 10-21 parts of a powdered oxide compound of a light metal or 1-5 parts of a powdered heavy metal. A metal component provided with a coating produced from an enamel powder according to the invention reliably withstands application of a hot gas flow. Therefore the coating according to the invention is particularly suitable for coating internal combustion engine components exposed to a flow of exhaust gas. The invention also specifies a method with which such metal components can be provided with an enamel coating.

Description

technical field [0001] The invention relates to an enamel powder, a metal component having a surface section with an enamel coating, and a method for producing the metal component. Background technique [0002] As in Dr.-Ing.Wolfgang Kühn in "Polysurfaces" Issue 2 / 09, pp. 6-9 und Grenzender Emaillierung von Leichtmetallen" (Possibility and Limitations of Enamelling of Light Metals) elaborated in detail, in addition to the steel and copper components known for centuries that can be enamelled, since the middle of the last century, light metals such as aluminum, magnesium, titanium The enamelling of components is also becoming more and more important. From a technical point of view, it is very important to protect the surface of components from corrosion. [0003] As explained further in this text, the enamel coating is a glass layer which is adapted, in particular with regard to the melting temperature and the coefficient of thermal expansion, to the carrier material provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/14C03C8/18C03C8/20
CPCC03C8/14C03C8/18C03C2207/08C03C8/20C23D5/02
Inventor 罗尔夫·戈施沃尔夫冈·屈恩安妮特·布雷特施奈德
Owner NEMAK S A B DE
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