METHOD FOR COATING BY THERMAL SPRAYING WITH AN INCLINED PARTICLE JET
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Abstract
A substrate is coated by cold-gas spraying in which a particle jet is oriented at an inclination to the surface of a substrate thus forming a spraying angle. To increase the possible spraying angle compared to the known art, the surface is applied with a directional patterning, for example trenches and ridges. The orientation of this patterning has an angle of inclination in the direction of the spraying angle. As a result, the adhesion of striking particles is improved and it is possible to achieve larger spraying angles.
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Citations
32 Claims
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1-12. -12. (canceled)
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13. A method for coating a substrate by thermal spraying, comprising:
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producing a structured surface of the substrate by pretreating the substrate, the structured surface having structure elements that are obliquely produced; and depositing particles of a particle jet onto the substrate by directing the particle jet onto the structured surface of the substrate at a spray angle between an axis of the particle jet and a surface normal of the substrate when the substrate is untreated, the structure elements being oriented towards the axis of the particle jet during the thermal spraying and having a spatial extent that is smaller, at least in a spray angle plane in which the spray angle lies, than an average diameter of the particles. - View Dependent Claims (14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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16. The method as claimed in claim 16, wherein the structure elements include trenches with symmetry planes oriented obliquely during production such that the symmetry planes are oriented towards the axis of the particle jet during the thermal spraying.
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