Electrode nozzle of electric arc spraying coater in supersonic speed and manufacturing method

A technology of supersonic arc and contact tip, which is applied in the direction of arc spraying, spraying device, spraying device, etc., and can solve problems affecting coating quality and production efficiency, contact resistance increase, arc breaking, etc.

Inactive Publication Date: 2005-01-12
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

If the inner hole of the contact tip is severely worn, the spatial position of the metal wire will change, resulting in misalignment of the two metal wires and inaccurate focus at the ends of the two metal wires; at the same time, the

Method used

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  • Electrode nozzle of electric arc spraying coater in supersonic speed and manufacturing method

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Embodiment

0.3

[0036] Mix the powders of 80-250 mesh cermet components fully and evenly, press the mold according to the size required by the cermet part of the contact tip, and then sinter in a vacuum furnace or a gas shielded furnace. The sintering temperature is 1300-1480°C. The sintering time is 1 to 2 hours; put the sintered cermet into another forming mold, melt the above-mentioned copper alloy components in an intermediate frequency furnace with nitrogen protection and stir evenly, and then pour into the mold where the cermet has been placed In the process, the mold pouring temperature is controlled between 1200-1300°C, and the mold is released after cooling, and the cermet part and the copper alloy part are firmly sintered together. The hardness of cermet reaches HRA88-93, the conductivity of copper alloy is 85-90% IACS (the conductivity of red copper is 89-94% IACS), and the hardness is HRB75-82 (the hardness of red copper is HRB45-52).

[0037] The service life of ...

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Abstract

An electric conducting tip for the supersonic arc-spraying machine is composed of the cylindrical front half made of cermat prepared from tungsten carbide, titanium carbide, tatalum carbide, niobium carbide and chromium (or cobalt or nickel) of carbide for high antiwear performance, and the cylindrical back half made of Cu alloy prepared from Cu, Cr, Zr, Mg and Ce or Y alloy.

Description

Technical field [0001] The invention relates to a conductive tip of a supersonic arc spraying machine and a manufacturing method thereof. Background technique [0002] When the metal arc spraying machine is working, the two metal wires of the contact tip generate an arc. Due to the high temperature of the arc, the metal wire is melted, atomized under the impact of high-pressure gas and forms high-speed moving particles that are sprayed onto the surface of the workpiece to form a coating. layer. [0003] When the contact tip is used for arc spraying, it is used as a conductor to transmit current to the metal wire, so it must have good electrical conductivity, and at the same time ensure good contact with the metal wire. The surface contact resistance between the contact tip and the metal wire is required to be small, otherwise it may be Causes heat generation and ablation of parts. [0004] The sliding friction between the contact tip and the metal wire causes the rapid wea...

Claims

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Application Information

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IPC IPC(8): B05B1/24B05B5/06B05B7/14B05B7/22B22D19/00B22D19/16B22F7/00C22C9/00C22C29/08
Inventor 刘少光张升才李志章王燕飞
Owner ZHEJIANG UNIV
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