Process for the additive manufacturing of a component and device

Abstract

The present invention relates to a method for the additive production of a component (10), comprising detecting an edge contour (11) of a layer (12) for the component (10) that is additively built up or to be built up from a powder bed (1) on a construction platform (2) and aligning a coating direction (BR) for a newly applied powder layer relative to the detected edge contour (11) such that an edge (11) of the additively built up layer (12) encloses an angle other than 90° with the coating direction (BR).

Description

[0001] The present invention relates to a method for the additive manufacturing of a component and a corresponding device. The method can be a coating process as part of an additive manufacturing process.

[0002] The component is preferably intended for use in a turbomachine, preferably a gas turbine. The component is preferably made of a superalloy, in particular a nickel- or cobalt-based superalloy. The superalloy can be precipitation-hardened or precipitation-hardenable.

[0003] Additive manufacturing processes have proven particularly advantageous for complex, complicated, or delicately designed components, such as labyrinthine structures, cooling structures, and / or lightweight structures. Additive manufacturing is characterized in particular by a particularly short chain of process steps, whereby a component's manufacturing or production step can be carried out directly based on design data, such as a corresponding CAD file. Furthermore, additive manufacturing is particularly advantageous for the development or production of prototypes that cannot be manufactured, or cannot be manufactured efficiently, using conventional subtractive or machining processes or casting technology, for example, for cost reasons.

[0004] An additive method of selective laser melting is known, for example, from EP 2 601 006 B1. Further prior art is known, for example, from US 2016 / 0 067 923 A1, WO 2015 / 009 444 A, WO 2015 / 167 335 A1, DE 10 2014 004 633 A1, US 2004 / 0 170 765 A1, US 2011 / 0 297 081 A1 and US 2016 / 0 098 825 A1.

[0005] In additive manufacturing (in the case of powder bed processes), the powder is applied as a thin layer to a preferably flat build platform before melting or solidifying, for example, using a slider or coater. The coater or squeegee is typically moved linearly across the build platform.

[0006] First, the component must be positioned on the build platform with a coating direction in mind. Simple components with a simple edge geometry or contour are preferably positioned in the center of the build platform and possibly with one edge parallel or perpendicular to the coating direction. Experience has shown that this type of arrangement is unfavorable because the coater would approach or sweep over the specified edge with the full width or extent for all layers. This can lead in particular to uneven layer application and / or increased local tool wear. Since this process or problem is the same for subsequent layers, it can cause error propagation and thus severely impair the layer or component quality.

[0007] One way to avoid these disadvantages is, for example, to arrange the component on the build plate in such a way that a coater encounters an edge or contour of the component at an oblique or slanted angle of, for example, 45°. This can be achieved, for example, by rotating or arranging the component accordingly, or by adapting a corresponding data model to the orientation of the build platform. However, this is often difficult for components to be manufactured, as a simple and / or linear edge geometry or contour of the components is rarely present, and the contour, in particular, changes or varies during the layer-by-layer build.

[0008] It is therefore an object of the present invention to provide means by which the aforementioned disadvantages can be limited or overcome.

[0009] This problem is solved by the subject matter of the independent patent claims. Advantageous embodiments are the subject matter of the dependent patent claims.

[0010] One aspect of the present invention relates to a method for additive manufacturing. The method comprises detecting an edge contour of a layer that has been or is to be additively built up from a powder bed on the build platform. The built-up layer is, in particular, an already melted and solidified layer for the component.

[0011] Detecting the edge contour preferably refers to detecting a position of the edge contour relative to the build platform or vice versa.

[0012] In this context, the term "edge contour" preferably refers to the outer, preferably horizontal, edges of the layer being built or to be built on the build platform and / or the contour of the component on the build platform formed by the edges. The edge contour can represent an outer boundary of the component, in particular of the corresponding built-up layer of the component.

[0013] In one embodiment, the edge contour of the additively built or to be built layer or the position of the edge contour relative to the build platform is recorded or determined using a data model, preferably design data, such as CAD data.

[0014] In one embodiment, the edge contour or its position relative to the build platform is physically recorded by means of a scanning process, for example with a laser scanner, in which the built-up layer is examined with a corresponding scanner.

[0015] In one embodiment, the edge contour is rasterized using a data model or manufacturing data and - as an auxiliary or quality assurance measure - using a scanner.

[0016] The method further comprises aligning a coating direction for a new powder layer to be applied relative to the detected edge contour or vice versa, such that an edge of the additively built-up or to-be-built layer encloses an angle, preferably finite or different from zero, and different from 90° with the coating direction.

[0017] In one embodiment, the alignment is performed such that the edge of the additively built-up or to-be-built layer forms an angle between 10° and 80° with the coating direction. This embodiment is particularly useful for utilizing the advantages of the invention. In particular, the aforementioned angle is preferably greater than 20° relative to the coating direction BR.

[0018] Preferably, the angle mentioned is between 10° and 80°, particularly preferably between 20° and 70°, in particular between 30° and 60°, for example 45°.

[0019] If the said edge is not linear or straight, preferably according to the invention several spaced-apart points or all points on the edge or their tangents enclose an angle different from 90° with the coating direction.

[0020] The coating direction is preferably a direction along a surface normal of a coating surface or perpendicular to the coating surface (see below). The coating surface is preferably the surface that is in direct contact with the powder and / or powder bed for the coating process or for distributing the newly applied layer on a production surface, and the surface that pushes the powder forward during a coating process.

[0021] The newly applied powder layer is intended to build up or solidify a further layer for the component.

[0022] Advantageously, the described method ensures that - as described above - edges of layers already additively built up are not passed over by a coater along their full extent and thus coating defects can be avoided.

[0023] Furthermore, powder bed-based processes can be carried out much more robustly and the quality of the manufactured components can be significantly improved.

[0024] In particular, dimensional and shape deviations of the component (e.g., from a model or ideal) can be reduced through improved coating quality. This, in turn, allows for cost and resource savings, as the scrap rate of faulty components can also be reduced.

[0025] In one embodiment, the coating direction is aligned relative to the detected edge contour by rotating the build platform, preferably together with any component structure arranged thereon.

[0026] In one embodiment, the coating direction is aligned relative to the detected edge contour by rotating a coating device and / or the coating direction, for example by a predetermined angle of a few degrees.

[0027] In one embodiment, the coating direction is aligned relative to the edge contour by rotating the build platform and - as described - by rotating the coating direction.

[0028] In one embodiment, the coating direction is aligned relative to the edge contour by changing the component design. This is done, for example, by correcting the design data, such as CAD and / or CAM data.

[0029] Alignment is carried out layer by layer or is repeated after each layer is built up.

[0030] In one embodiment, the alignment is carried out on the basis of a calculation supported by CAD and / or CAM data or data derived therefrom for the additive manufacturing of the component.

[0031] In one embodiment, after each layer built up or solidified for the component, it is checked after or by the detection whether the corresponding edge encloses an angle other than 90° with the coating direction, wherein the coating direction is realigned if negative.

[0032] In one embodiment, the method is a coating method for additive manufacturing.

[0033] In other words, the method steps of detecting and / or aligning can be carried out anew for each powder layer according to the invention.

[0034] A further aspect of the present invention relates to a device for the powder-bed-based additive manufacturing of a component, as described above, wherein the device is configured to coat a manufacturing surface for the layered additive build-up uniformly along a coating direction with a new powder layer (layer by layer), wherein a coating direction forms an angle other than 90° with the coating direction. Accordingly, the described device is preferably also configured to solve the above-mentioned disadvantages or problems with the coating according to the invention.

[0035] The powder is preferably a powdered base material for the component.

[0036] In one embodiment, the coating surface (see above) is curved, for example, at the outer edges of the production surface in the direction of the coating direction. This embodiment preferably allows the aforementioned problems to be solved according to the invention, specifically without complex or complicated process steps. In particular, the curved design of the device, in particular of the part of the device comprising the coating surface, ensures that an edge contour or edge of an already solidified component layer forms an angle other than 90° with the coating direction.

[0037] In one embodiment, the coating surface has at least two flat partial surfaces angled to one another, of which at least one advantageously forms an angle other than 90° with the coating direction. This embodiment is provided as an alternative to the curved configuration of the coating surface described above and also enables the advantages of the invention.

[0038] In one embodiment, the device comprises a round build platform. The round shape of the build platform is particularly related to a top view of the build platform. In contrast to the two previously mentioned embodiments, this embodiment of the device allows the inventive object to be achieved by rotating the build platform or the coating direction (see above).

[0039] In one embodiment, the device is a coating device or coater, in particular a powder pusher, a doctor blade, or a powder roller for the additive construction of complex, high-temperature-resistant components. Accordingly, the device is preferably also designed to be high-temperature-resistant, preferably resistant or heat-resistant for temperatures above 1000°C, preferably 1200°C.

[0040] Embodiments, features and / or advantages that relate to the method in the present case may also relate to the device or vice versa.

[0041] Further details of the invention are described below with reference to the figures. Fig. 1 shows a schematic sectional or side view of a coating device. Fig. 2 shows a schematic plan view of the device. Fig. 3 shows a schematic side view of a component on a build platform. Fig. 4 shows a schematic plan view of the component from Fig. 3. Fig. 5 shows a schematic side view of a component on a build platform. Fig. 6 shows a schematic plan view of the component from Fig. 5. Fig. 7 shows a schematic side view of a component. Fig. 8 shows a schematic plan view of the component from Fig. 7. Fig. 9 shows a schematic side view of another component on a build platform. Fig. 10 shows a schematic plan view of the component from Fig. 9. Fig. 11 shows a schematic side view of another component on a build platform. Fig. 12 shows a schematic plan view of the component from Fig. 11. Fig. 13 shows a schematic side view of another component. Fig. 14 shows a schematic plan view of the component 13. Fig. 15 shows a schematic sectional or side view of a device according to the invention. Fig. 16 shows a schematic plan view of the device from Fig. 15. Fig. 17 a schematic flow diagram indicating process steps of a process according to the invention. Fig. 18 indicates two different embodiments of a coater according to the invention. Fig. 19 shows a further embodiment of a device according to the invention.

[0042] In the exemplary embodiments and figures, identical or similarly functioning elements may be provided with the same reference numerals. The illustrated elements and their relative sizes are generally not to be considered to scale; rather, individual elements may be exaggeratedly thick or oversized for clarity and / or clarity.

[0043] The Fig. 1 to 14 describe in particular known aspects and relationships in additive manufacturing, in particular the corresponding coating processes as well as devices and methods of the prior art.

[0044] In particular, Fig. 1 a device 30 in a schematic sectional or side view. The device 30 comprises a build platform 2. The build platform 2 is preferably arranged in a powder bed or powder 1. For the construction of a component by a corresponding powder bed process, a production surface HF of the build platform and / or an already built layer (not explicitly in Fig. 1) is coated with powder. For this purpose, a coater 32 is provided, which can be guided on a suspension 31 or moved accordingly by the suspension. The coater 32 can, for example, be machine-controlled. For a new powder application, the coater is preferably guided along a movement or coating direction BUR (see below), in this case from left to right, over the production surface HF, and a new powder layer is applied. The new powder layer can then be exposed, melted, and solidified, for example by means of a laser or an electron beam, according to the desired geometry.

[0045] Fig. 2 shows the device from Fig. 1 in a schematic plan view. The arrow defining the coating direction BUR and the coating direction BR is intended in this case to be used in particular for the Fig. 1 as well as for the Fig. 2 be valid.

[0046] In Fig. 2, it can be seen that the coater 32 extends along the production surface HF (see Y-axis). The coater 32 can have a roller, a blade, a doctor blade, a brush, or another suitable configuration.

[0047] Fig. Figure 3 shows a component 10 arranged on a conventional build platform 2, for example. According to the powder-bed-based process, the build platform 2 is typically lowered layer by layer during the additive construction of the component 10. This is preferably done via a lowering device 20.

[0048] The component further comprises an edge or edge contour 11.

[0049] Fig. 4 shows a schematic top view of the component or the corresponding construction platform from Fig. 3. It can be seen in particular that the component is arranged or aligned relative to the construction platform 2 such that the edges 11 are oriented parallel to the edges of the construction platform 2. If, according to this arrangement, a coater 32 (cf. Fig. 2), for example, move horizontally according to the coating direction BUR over the production area HF, whereby the production area HF can also be defined by an already built-up layer, in order to apply a new powder layer, the coater would at some point move with its full width (compare coating area BF in Fig. 2) hit an edge 11 of the component 10 (compare the dashed line, which indicates the coating surface or the coating device). This can lead to irregular coating results or coating defects to a considerable extent, as this process is repeated layer by layer during the construction of the component, and thus coating defects can propagate or accumulate. To solve this problem, for example, the component 10 can be placed on the construction platform 2 according to the illustrations of the Fig. 5 and Fig. 6 are arranged or aligned. In Fig. 6, for example, shows that a contour or edges 11 of the component 10 are not oriented parallel to the side edges of the build platform and, accordingly, not parallel to a coating direction BUR. Therefore, a coater (again compare dashed line in Fig. 6) initially only hit a corner 13 or vertical edge of the component 10, whereby the coating defects described hardly occur.

[0050] Fig. 7 shows a schematic side view of another component 10. A schematic plan view of this component is shown in Fig. 8 shown.

[0051] This component 10 has, in particular, a first region B1. The first region B1 can be a base body or base region for the component 10. A second region B2 is also constructed and depicted on the first region B1. The second region B2 can, for example, be a functional region.

[0052] The first region B1 and the second region B2 are both cuboid-shaped. However, the edge contours (see reference numeral 11) of the first region B1 and the second region B2 are arranged so as to be rotated relative to one another according to the individual geometry of the component 10, so that the side edges 11 of the first region B1 and the side edges 11 of the second region B2 are not parallel.

[0053] To give a concrete example, the component 10 can be a turbine blade, wherein the first region B1 denotes a blade root and the second region B2 denotes, for example, the actual blade. In such complex, particularly non-cuboidal components, the edge contour varies along a construction direction (from bottom to top) of the component, so that in order to avoid the disadvantages mentioned here during coating, a compromise must be found for the orientation of the component 10 on the construction platform 2 (see Fig. 13 and Fig. 14 below).

[0054] If component 10 is made of Fig. 7 for example, according to the Fig. 9 and Fig. 10 is arranged on the construction platform 2, for example, a coater 32, which coats the production surface HF from the left along a coating direction BUR (compare Fig. 10), first hit the corner 13 of the first area B1 of the component 10 (compare the dashed line in Fig. 10). At a later stage of the build, namely when the build has already progressed to the second region B2, an edge 11 of the second region would again coincide with the full width of the coater 32.

[0055] If the component is in accordance with Fig. 11 and Fig. 12, the process would be reversed and an edge 11 of the first region B1 of the component 10 would be approached by the coater 32 and cause the corresponding coating defects, although the coating defects would be eliminated for the construction of the second region B2.

[0056] Fig. 13 indicates the arrangement of the described component 10 on the construction platform 2, according to which the described coating defects during additive construction are at least largely prevented. This is particularly the case since neither the edges of the first region nor the edges of the second region are aligned parallel to the coating surface BF or the coating device 32 when the coating device moves over the production surface in the coating direction BUR (compare the dashed line in Fig. 14).

[0057] The Fig. The extension or height of the regions B1, B2 indicated in 13 preferably corresponds to a multiple of a single solidified layer (compare reference numeral 12 in Fig. 13), which is also indicated by a dashed line.

[0058] Such a compromise as in Fig. 14, however, depending on the complexity of the shape, additively manufactured components are often difficult or even impossible, regardless of the technical field in which these components are used, since the orientation of the components relative to the build platform, once a single layer has been solidified on it, can hardly be changed subsequently.

[0059] The Fig. 15 to 18 describe solutions according to the invention which allow the problem of coating defects to be solved, for example, from the outset and independently of the initial orientation of the respective component.

[0060] Fig. Figure 15 shows a device 50 according to the invention in a schematic side or sectional view. The device 50 according to the invention also comprises a construction platform 2. The device 50 further comprises a suspension 61, to which a coater 60 is expediently movably or displaceably coupled. According to the illustration of Fig. 1, the device 50 is preferably designed to apply powder layers or powder layers for additive manufacturing to a manufacturing surface HF by means of the coater 60. This is preferably done, as shown, from left to right according to the coating direction BUR.

[0061] The build platform 2 is preferably round, as in Fig. 16 in the corresponding schematic plan view of the device 50.

[0062] According to the invention, the construction platform 2 and / or the remaining parts of the device, comprising the coating device consisting of suspension 61 and coater 60, are movable about a rotation axis DA. In particular, the construction platform 2 and the remaining components are preferably movable or rotatable independently of one another about the rotation axis DA. These embodiments enable an adjustment of the orientation of the component or individual layers built up for it (not explicitly shown) during additive manufacturing, so that a coating surface BF of the coater 60 is preferably not along its full width (compare Y-axis in Fig. 16) hits edges of a corresponding component and preferably not always at the same point along the edge.

[0063] Unlike in Fig. 16, the coating device, ie the suspension 61 and the coater 60, can preferably be completely movable down and up again from the construction platform 2 by suitable means, so that a rotation, for example, of the construction platform 2 relative to the coating device takes place when new powdery base material to be applied (compare reference numeral 1 in Fig. 16) is preferably not in contact with a HF production surface. This could otherwise lead to undesired powder movement (swirling movement) and also impair the production quality.

[0064] Based on the Fig. 15, Fig. 16 and Fig. 17, a method according to the invention is presented and described which solves the coating problems addressed here.

[0065] In particular, Fig. 17 a schematic flow diagram. The method step a) describes the detection of the edge contour 11 or edge geometry of a layer 12 additively built up or to be built up from a powder bed 1 for the component 10 on a build platform 2 (cf. Fig. 13 and dashed line in Fig. 16, which indicates the edge contour 11 of a corresponding layer).

[0066] For example, the edge contour or its position relative to the build platform is recorded using a data model, preferably using design data and / or CAD data.

[0067] Alternatively or additionally, the edge contour 11 or its position or course relative to the build platform 2 is physically recorded by means of a scanning process, for example with a laser scanner, in which the built-up layer is examined with a corresponding scanner.

[0068] Method step b) describes the alignment of a coating direction BR for a newly applied powder layer relative to the detected edge contour 11 such that an edge 11 of the additively built-up or to-be-built layer 12 forms an angle different from 90° with the coating direction BR. Accordingly, in Fig. 16, an angle α is shown, which preferably differs from 0 and 90°, in particular, for example, is greater than 20° and indicates a relative rotation between the edge contour 11 of the layer 12 and the coating direction BUR. The coating direction BR can coincide with the described coating direction BUR (compare the Fig. 1 to 16).

[0069] The said alignment can be carried out in such a way that, in particular, the coating direction BR is changed by rotating the coater and / or the coating device relative to the edge contour 11 or the component 10.

[0070] Alternatively or additionally, in order to change an alignment of the component and the coating direction that is unfavorable for the coating result, the construction platform can be rotated relative to the coating direction, preferably with a component structure possibly arranged thereon.

[0071] A corresponding alignment can also be achieved by changing the component design, particularly for a new layer to be applied and subsequently solidified.

[0072] According to the invention, the alignment is preferably carried out layer by layer and on the basis of a calculation supported by CAD and / or CAM data or data derived therefrom for the additive manufacturing of the component.

[0073] Preferably, according to the invention, after each layer 12 has been built up for the component 10, after or by detecting, it is checked whether the edge 11 forms an angle other than 90° (cf. α) with the coating direction BR, and, if negative, the coating direction BR is realigned.

[0074] Under certain circumstances, it may not always be possible or possible for all edge areas or edge points, particularly in the case of round contours, for all points of an edge or their tangents to enclose an angle other than 90° with the coating direction BR.

[0075] However, the problem according to the invention can also be solved if many of the points or the corresponding edge enclose a (finite) angle different from 90° with the coating direction BR to the greatest possible extent.

[0076] In the case of round or oval edge contours, the coating direction BR is preferably changed or "rotated" layer by layer, ie per layer built up, during the additive build-up of the component, in such a way that along the edge contour always different or successively different points on the contour or the edge are arranged "unfavorably", ie that the problems to be solved according to the invention still occur at the latter points or positions on the edge.

[0077] In the Fig. 18 and Fig. 19, alternative solutions to the described methods are presented, which are achieved by the device according to the invention and the Fig. 18 can be solved using the coater shown.

[0078] In the representations of the Fig. 18 and Fig. 19, the coating direction BR deviates from the described coating direction BUR as indicated due to the design of the coater or coating device.

[0079] In the top view of Fig. 18, a coater 60 according to the invention is shown. The coater can be, in particular, a doctor blade, a slider, a brush, or a roller, suitable for coating any production surface for the additive construction of a component. The Fig. The coater 60 shown in Figure 18 has a coating surface BF or defines this (see above). It is further shown that this coater is angled or its coating surface BF is divided into two mutually angled partial surfaces 70. The said coater is particularly designed such that both a coating direction BR 1 and a coating direction BR 2 of the corresponding partial surfaces in a coating direction BUR from left to right, an edge contour of a component (in Fig. 18 to 19 not explicitly shown) at an angle other than 90° and thus offer the advantages according to the invention.

[0080] This applies in particular to the one shown in the right view of Fig. 18, which has a curved coating surface BF. Due to this configuration, an edge contour of a component, provided it is a linear or straight edge, is automatically approached or "hit" at a specific angle when the coater, for example, is moved by a suspension or discharge device 61 (see Fig. 15) in the direction of the coating direction BUR (compare Fig. 18) is moved.

[0081] The described coater 60 with the curved coating surface BF describes a particularly preferred embodiment which almost always enables the advantages according to the invention; namely, whenever, for example, an edge contour of a component deviates in shape and orientation from the geometry of the curved coating surface BF.

[0082] Fig. Figure 19 shows a further embodiment of a device 50 according to the invention, which also has a coater 60. The coater 60 has, analogously to the illustrations of Fig. 1 to 16 preferably have a flat and linear coating surface BF. However, in contrast to the previously shown illustrations, a coating direction BR (compare dashed line in Fig. 19 at an angle α to a coating direction BUR. According to this embodiment, a component, for example as shown in the Fig. 3 and Fig. 4, with its edges parallel to the edges of the build platform 2, without the coating defects described above occurring.

[0083] The invention is not limited to the exemplary embodiments by the description thereof, but encompasses any novel feature and any combination of features. This includes, in particular, any combination of features in the patent claims, even if this feature or combination itself is not explicitly stated in the patent claims or exemplary embodiments.

Claims

[1] Method for the additive manufacturing of a component (10) comprising the following steps: - detecting an edge contour (11) of a layer (12) additively built up or to be built up from a powder bed (1) for the component (10) on a construction platform (2), - Aligning a coating direction (BR) for a newly applied powder layer relative to the detected edge contour (11) such that an edge (11) of the additively built-up or to-be-built layer (12) encloses an angle other than 90° with the coating direction (BR), wherein the alignment is carried out layer by layer or is repeated after each built-up layer, and wherein the coating direction (BR) designates a direction along a surface normal of a coating surface (BF) or perpendicular to the coating surface (BF). [2] Method according to claim 1, wherein the edge contour (11) of the additively built or to be built layer (12) or the position of the edge contour (11) relative to the construction platform (2) is recorded using a data model, preferably design data, such as CAD data. [3] Method according to claim 1 or 2, wherein the alignment is carried out such that the edge (11) of the additively built-up or to-be-built layer (12) encloses an angle between 10° and 80° with the coating direction (BR). [4] Method according to one of the preceding claims, wherein the coating direction (BR) is aligned relative to the edge contour (11) by rotating the building platform (2). [5] Method according to one of claims 1 to 3, wherein the coating direction (BR) is aligned relative to the edge contour (11) by rotating the coating direction (BR). [6] Method according to one of the preceding claims, wherein the coating direction (BR) is aligned relative to the edge contour (11) by rotating the building platform (2) and by rotating the coating direction (BR). [7] Method according to one of the preceding claims, wherein the coating direction (BR) is aligned relative to the detected edge contour (11) via a change in the component design. [8] Method according to one of the preceding claims, wherein the alignment is carried out layer by layer and is carried out on the basis of a calculation supported by CAD and / or CAM data for the additive manufacturing of the component. [9] Method according to one of the preceding claims, wherein after each layer (12) built up for the component (10), it is checked after or by the detection whether the edge (11) encloses an angle different from 90° with the coating direction (BR) and, if negative, the coating direction (BR) is realigned. [10] Device (50) for the powder bed-based additive manufacturing of a component (10) according to the method according to one of the preceding claims, which is designed to coat a manufacturing surface (HF) for the layer-by-layer additive construction with a powder layer uniformly along a coating direction (BUR), wherein a coating direction (BR) forms an angle different from 90° with the coating direction (BUR). [11] Device (50) according to claim 10, wherein a coating surface (BF), for example at outer edges of the production surface (HF), is curved in the direction of the coating direction (BUR). [12] Device (50) according to claim 10 or 11, wherein the coating surface (BF) has at least two flat partial surfaces (70) angled to one another. [13] Device (50) according to one of claims 10 to 12, comprising a round building platform (2). [14] Device (50) according to one of claims 10 to 13, which comprises a coating device, in particular a powder slide, for the additive construction of complex high-temperature-resistant components.

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