Metal part additive manufacturing method and device based on reinforced thermodynamic cycle

Abstract

The invention relates to a metal part additive manufacturing method and device based on a strengthened thermodynamic cycle, and the method comprises the steps that a three-dimensional model of a metal part is constructed, continuous slicing is conducted in the height direction of the three-dimensional model according to the preset layer thickness, and a plurality of metal layers of the metal part and two-dimensional sections corresponding to the metal layers are obtained; dividing each two-dimensional section into a plurality of micro-areas, and setting scanning parameters for each micro-area; in the process that the metal layers are manufactured in sequence through the powder bed melting technology to obtain the metal part, scanning is conducted through a heat source according to the corresponding scanning parameters for each micro-area in each two-dimensional cross section, so that melting channels are generated in the micro-areas for multiple times in the manufacturing process; the high temperature residence time of the microcell is increased. According to the embodiment of the invention, the small-area micro-area of the metal part can be scanned for multiple times by setting the heat source scanning parameters, melting channels are generated for multiple times, and the high-temperature retention time of the micro-area is prolonged, so that cracks of the metal part are inhibited.

Claims

1. A method for additive manufacturing of metal components based on enhanced thermal cycle, characterized in that, the method includes: Constructing a three-dimensional model of a metal component, and continuously slicing along the height direction of the three-dimensional model according to a preset layer thickness to obtain a plurality of metal layers of the metal component and two-dimensional cross-sections corresponding to each of the metal layers; Dividing each of the two-dimensional cross-sections into a plurality of micro-regions, and setting scanning parameters for each of the micro-regions; During the process of sequentially manufacturing the metal layers by using powder bed melting technology to obtain the metal component, for each micro-region in each of the two-dimensional cross-sections, scanning is performed by using a heat source according to the corresponding scanning parameters, so that melting channels are generated multiple times in each of the micro-regions during the manufacturing process, and the high-temperature residence time of each of the micro-regions is increased.

2. The method according to claim 1, characterized in that, the scanning parameters include at least one of the following: the number of scanning passes of the heat source, the scanning direction, the scanning pass spacing, the size of the light spot, the power of the heat source, the scanning rate, and the number of repeated scans, and the scanning direction includes one-way scanning and two-way scanning, the number of times of generating the melting channel in each of the micro-regions is the product of the number of scanning passes of the heat source in this micro-region and the number of repeated scans.

3. The method according to claim 2, characterized in that, dividing each of the two-dimensional cross-sections into a plurality of micro-regions includes: Dividing each of the two-dimensional cross-sections into a plurality of the micro-regions according to preset micro-region parameters, and the micro-region parameters include: the area overlap distance between adjacent micro-regions, the region shape of each of the micro-regions, the region area of each of the micro-regions, the starting angle of each of the micro-regions, and the interlayer rotation angle.

4. The method according to claim 3, characterized in that, the method further includes: numbering the plurality of micro-regions in each of the two-dimensional cross-sections according to a preset numbering rule; wherein, scanning each of the micro-regions in each of the two-dimensional cross-sections by using a heat source according to the corresponding scanning parameters includes: scanning each of the micro-regions in each of the two-dimensional cross-sections by using a heat source according to the order corresponding to the numbering and the corresponding scanning parameters; wherein, the preset numbering rule includes any one of the following: numbering from top left to bottom right, numbering from bottom left to top right, numbering from top right to bottom left, numbering from bottom right to top left, random numbering.

5. The method according to claim 3, characterized in that, the metal component includes any one of the following: a divertor component of a fusion reactor, an armor-piercing component, a cylindrical part; the metal powder for manufacturing the metal component includes at least one of the following: pure metal powders of tungsten, molybdenum, tantalum, niobium, vanadium, zirconium, rhenium, hafnium, alloy powders of tungsten, molybdenum, tantalum, niobium, vanadium, zirconium, rhenium, hafnium, When the heat source is a laser beam, the preset layer thickness is 10 μm to 80 μm; the overlap distance of the area is -100 μm to 100 μm; the shape of the area includes at least one of the following: rectangle, square; the area of the area is 0.01 mm 2 to 1.00 mm 2 ; the number of scan lines is 1 to 20; the number of repeated scans is 1 to 20; the scan line spacing is 20 μm to 200 μm; the laser spot size is 25 μm to 200 μm; the scan rate is 100 mm / s to 2000 mm / s; the power of the laser is 250 W to 600 W; the width of the melting line is 80 μm to 400 μm.

6. The method according to claim 3, characterized in that, the method further includes: During the process of sequentially manufacturing the metal layers by using powder bed melting to obtain the metal component, scanning the contour of each of the two-dimensional cross-sections by using a heat source.

7. An additive manufacturing device for metal components based on enhanced thermal cycle, characterized in that, the device includes: A model construction module, configured to construct a three-dimensional model of a metal component, and perform continuous slicing along the height direction of the three-dimensional model according to a preset layer thickness, to obtain a plurality of metal layers of the metal component and two-dimensional cross-sections corresponding to each of the metal layers; A micro-region division module, configured to divide each of the two-dimensional cross-sections into a plurality of micro-regions, and set scanning parameters for each of the micro-regions; A scanning module, configured to, in the process of sequentially manufacturing the metal layers by using a powder bed melting technique to obtain the metal component, perform scanning on each micro-region in each of the two-dimensional cross-sections by using a heat source according to the corresponding scanning parameters, so that a plurality of melting channels are generated in each of the micro-regions during the manufacturing process, and the high-temperature residence time of the micro-regions is increased.

8. The apparatus according to claim 7, wherein, the scanning parameters include at least one of the following: the number of scanning channels of the heat source, the scanning direction, the scanning channel spacing, the size of the light spot, the power of the heat source, the scanning rate, and the number of repeated scans, and the scanning direction includes one-way scanning and two-way scanning, the number of times of generating the melting channel in each of the micro-regions is the product of the number of scanning channels of the heat source in the micro-region and the number of repeated scans.

9. The apparatus according to claim 8, wherein, the micro-region division module is further configured to: divide each of the two-dimensional cross-sections into a plurality of the micro-regions according to preset micro-region parameters, and the micro-region parameters include: the regional overlap distance between adjacent micro-regions, the regional shape of each of the micro-regions, the regional area of each of the micro-regions, the starting angle of each of the micro-regions, and the interlayer rotation angle.

10. The apparatus according to claim 9, wherein, the apparatus further includes: a micro-region numbering module, configured to number a plurality of micro-regions in each of the two-dimensional cross-sections according to a preset numbering rule; wherein, the scanning module is further configured to: perform scanning on each of the micro-regions in each of the two-dimensional cross-sections by using a heat source according to the order corresponding to the numbering and the corresponding scanning parameters; wherein, the preset numbering rule includes any one of the following: numbering from top left to bottom right, numbering from bottom left to top right, numbering from top right to bottom left, numbering from bottom right to top left, and random numbering.

11. The apparatus according to claim 9, wherein, the metal component includes any one of the following: a divertor component of a fusion reactor, an armor-piercing component, a cylindrical part; the metal powder for manufacturing the metal component includes at least one of the following: pure metal powders of tungsten, molybdenum, tantalum, niobium, vanadium, zirconium, rhenium, hafnium, alloy powders of tungsten, molybdenum, tantalum, niobium, vanadium, zirconium, rhenium, hafnium, When the heat source is a laser beam, the preset layer thickness is 10 μm to 80 μm; the area overlap distance is -100 μm to 100 μm; the area shape includes at least one of the following: rectangle, square; the area is 0.01 mm 2 to 1.00 mm 2 ; the number of scanning passes is 1 to 20; the number of repeated scans is 1 to 20; the scanning pass spacing is 20 μm to 200 μm; the laser spot size is 25 μm to 200 μm; the scanning rate is 100 mm / s to 2000 mm / s; the power of the laser is 250 W to 600 W; the width of the melting pass is 80 μm to 400 μm.

12. The apparatus according to claim 9, wherein, the apparatus further includes: a contour scanning module, configured to, in the process of sequentially manufacturing the metal layers by using a powder bed melting method to obtain the metal component, perform scanning on the contour of each of the two-dimensional cross-sections by using a heat source.

13. An electronic device, wherein, it includes: a processor; a memory for storing instructions executable by the processor; wherein, the processor is configured to call the instructions stored in the memory to execute the method according to any one of claims 1 to 6.

14. A computer-readable storage medium having computer program instructions stored thereon, wherein, when the computer program instructions are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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