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Plasma Spraying Method for Coating Cylinder Liner Faces of Internal Combustion Engine Crankcases

A technology of plasma and spraying method, which is applied in the direction of metal material coating process, coating, mechanical equipment, etc., and can solve problems such as multi-time

Active Publication Date: 2022-03-25
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of the methods known from the prior art is that they require a relatively large amount of time for the coating process

Method used

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  • Plasma Spraying Method for Coating Cylinder Liner Faces of Internal Combustion Engine Crankcases
  • Plasma Spraying Method for Coating Cylinder Liner Faces of Internal Combustion Engine Crankcases
  • Plasma Spraying Method for Coating Cylinder Liner Faces of Internal Combustion Engine Crankcases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] figure 1 A section of a cylinder crankcase of a stroke piston internal combustion engine is shown together with a section of a cylinder liner running surface of an aluminum base body 10 of the cylinder crankcase 14, wherein the aluminum base body 10 is provided with the coating 12 and the surface 16 facing away from the aluminum base body 10 is the cylinder Portion of the working face 18 of the cylinder liner of the crankcase 14 . The partially represented black areas 20 are oxides, which have been formed during the application of the coating 12 by means of the plasma spray method.

[0038] figure 2 The surface 16 of the working face 18 of the cylinder liner is shown. As can be recognized in the figure, individual oxide rows 22a, 22b, 22c, 22d have been formed on the surface 16, which are formed by black dots, which are arranged almost in rows. Here, it is the oxide row structure mentioned at the outset.

[0039] image 3 shows something like figure 1 , wherein t...

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Abstract

The invention relates to a plasma spraying method for coating the working surface of the cylinder liner of the cylinder crankcase of the stroke piston internal combustion engine. The object underlying the present invention is to provide a coating method for use by means of which the formation of oxides or oxide row structures in the layer structure is restricted and thus avoids the occurrence of oxide spalling and in particular due to The resulting microgrooves have a negative impact. According to the plasma spraying method according to the invention for coating the cylinder liner working surface of a cylinder crankcase (14) of a stroke piston internal combustion engine, the coating (12) is applied to the cylinder crankcase (14) at least partially with the following parameter combination ) on the cylinder liner working surface (18): a) rotation speed: 600‑800 rpm, b) spray delivery rate: 80‑180 g / min, and c) feed rate: 24‑75 mm / min second.

Description

technical field [0001] The invention relates to a plasma spraying method for coating a working surface of a cylinder liner of a cylinder crankcase of a stroke piston internal combustion engine. Background technique [0002] WO 2017 / 202852 A1 discloses a coating method for coating curved surfaces, thermal coating and cylinders with thermal coating. In this case, reference is made in particular to the use of powdered coating materials in the case of thermal spraying equipment, in particular plasma spraying equipment or HVOF spraying equipment with burners (Brenner, sometimes referred to as nozzles) at the burner shank Rotation at a predetermined rotational frequency about the shank axis, wherein the coating jet for applying the coating to the curved surface is directed at least partially radially away from the shank axis at the curved surface. In this case, reference is made to the use of increased rotational frequencies of more than 200 revolutions per minute (U / min), in par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/137C23C4/06C23C4/11
CPCC23C4/134C23C4/137C23C4/06C23C4/11C23C4/02C23C4/10C23C4/08C23C4/14B05B7/226B05B13/0636C23C4/16C22C38/40F02F7/0085
Inventor K.克利梅克
Owner VOLKSWAGEN AG