Method and an apparatus for arc spraying
AssigneeSulzer Metco AG
InventorsGerard Barbezat, Christian Warnecke
Life of this patent
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Abstract
A method is proposed for arc spraying by means of a spray gun (1). The spray gun includes two electrically conductive spray wires (2) and at least one first supply device (3) for supplying a fluid (4), with an electrical voltage being applied to the spray wires (2), the spray wires (2) being fed by means of a wire guide (5), an arc (6) being ignited by the electrical voltage, the spray wires (2) being converted into a melt (8) in a melting region (7) and the melt (8) being applied by the fluid (4) to the surface (9) of a body (10). In this connection, particles (11) from a storage container (12) are supplied to the melt (8) by the fluid (4).
Claims12
A method of arc spraying by means of a spray gun (1) which includes two electrically conductive spray wires (2) and at least one first supply device (3) for supplying a fluid (4), with an electrical voltage being applied to the spray wires (2), the spray wires (2) being fed by means of a wire guide (5), an arc (6) being ignited by the electrical voltage, the spray wires (2) being converted into a melt (8) in a melting region (7) and the melt (8) being applied by the fluid (4) to the surface (9) of a body (10), characterised in that particles (11) from a storage container (12) are supplied to the melt (8) by the fluid (4).
A method in accordance with any one of the preceding claims, in which the fluid (4) includes a gas, in particular a noble gas such as helium or argon, or nitrogen or oxygen.
A method in accordance with any one of the preceding claims, in which the particles (11) include a ceramic material, in particular Al2O3, Cr2O3, TiO2, ZrO2 and/or a carbide, in particular WC, Cr3C2, TiC, TaC, Fe3C, diamond niobium carbide, vanadium carbide and/or a boride and/or a nitride, in particular cBN or hBN, and/or a metal and/or a metal alloy.
A method in accordance with any one of the preceding claims, in which the size of the particles (11) is selected to be between 1 μm and 200 μm, preferably between 5 μm and 80 μm.
A method in accordance with any one of the preceding claims, in which the wire guide (5) includes a controllable or regulatable wire feed (13).
A method in accordance with any one of the preceding claims, in which the working pressure of the fluid (4) and/or the supplied amount and/or kind of particles (11) and/or the wire feed (13) and/or any desired further process parameter can be set individually by means of a freely programmable control unit (14).
A method in accordance with any one of the preceding claims, in which particles (11) of different materials and/or particles of different size are supplied to the fluid (4) from different storage containers (12) to change the composition of the particle flow.
An apparatus for arc spraying comprising a spray gun (1) which includes a wire guide (5) for feeding two electrically conductive spray wires (2) and at least one first supply device (3) for supplying a fluid (4), with an electrical voltage being able to be applied to said spray wires (2) such that an arc (6) can be ignited and thereby the spray wires (2) can be converted into a melt (8) in a melting region (7), with the melt (8) being able to be applied to the surface (9) of a body (10) by the fluid (4), characterised in that means (15) are provided in order to supply particles (11) from a storage container (12) to the melt (8) by the fluid (4).
Dependencies are inferred from the claim text.