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Thermal Control Coating

A technology of thermal cladding and variable control, used in coatings, metal material coating processes, fusion spraying, etc.

Inactive Publication Date: 2017-05-31
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this is not optimal, since the power drop at the burner caused solely by the voltage drop is compensated by the increased powder mass flow

Method used

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Embodiment Construction

[0014] Coatings are applied by thermal coating processes such as SPPS (Solution Precursor Plasma Spraying), HVOF (Hypervelocity Oxygen Fuel Spraying), APS (Atmospheric Plasma Spraying), LPPS (Low Pressure Plasma Spraying), VPS (Vacuum Plasma Spraying), etc. In this case, a plasma or a flame is generated in a nozzle through which the material is injected or at the end of the nozzle.

[0015] The material flow behavior is changed by wear on the nozzle or on the coating device and thus also the degree of melting of the material, in particular the powder.

[0016] figure 1 Shown according to the prior art in nozzle 30 and electrode 36 ( Figure 10 ) between the voltage U B An exemplary variation curve of . The voltage U between the nozzle 30 and the electrode B decreases over time t and then goes into saturation. In other nozzle types the voltage U at time t B Continuous declines or other changes are also possible.

[0017] Corresponding to this is the variation of the ave...

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Abstract

Through the combined measurement of particle velocity, particle temperature, particle strength, burner voltage and their adjustment within tolerances, the layer structure, layer thickness and layer weight are maintained despite wear-induced fluctuations during the coating process constant.

Description

technical field [0001] The invention relates to a technology of thermal cladding. Thermal spraying processes are used to produce metallic and ceramic layers in which the material is completely or at least partially melted. Background technique [0002] The material is injected eg into a nozzle of a plasma burner or externally. The nozzles wear out due at least to the high plasma temperature and the influence of the powder material. This leads to wear-related fluctuations in the cladding process, which are mainly caused by the voltage drop across the burner. [0003] To date, these fluctuations have been equalized by readjusting the powder mass flow in order to keep the desired layer weight of the blade within the permissible tolerance range. [0004] However, this is not optimal, since the power drop at the burner caused solely by the voltage drop is compensated by the increased powder mass flow. Contents of the invention [0005] It is therefore an object of the prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/129C23C4/134
CPCC23C4/129C23C4/134
Inventor 马里奥·费尔克尔萨沙·马丁·基耶克约翰内斯·里希特
Owner SIEMENS AG