CN-122007445-A - Deformation inhibition method for nickel-based superalloy component in suspension area with different angles

CN122007445ACN 122007445 ACN122007445 ACN 122007445ACN-122007445-A

Abstract

A deformation inhibition method for a nickel-based superalloy component in different angle suspension areas comprises the steps of obtaining a component model, slicing the component model to obtain a plurality of slice models, dividing each slice model into an unsupported suspension area and a solid area, setting laser selective fusion forming parameters of the unsupported suspension area and laser selective fusion forming parameters of the solid area, paving nickel-based alloy powder layer by layer, forming the solid area on each layer of nickel-based alloy powder by a laser selective fusion device, then carrying out discontinuous forming of the unsupported suspension area, and repeating the steps in sequence until the laser selective fusion device completes laser fusion forming of all layers of nickel-based alloy powder, thereby obtaining the nickel-based alloy unsupported component. The method obtains the nearly fully dense nickel-based alloy unsupported component with single-layer buckling deformation not exceeding 80 mu m, lower breadth roughness Sa less than 30 mu m and compactness higher than 99 percent in the forming process.

Inventors

LIN DANYANG
TAN CAIWANG
LUO WENRUI
MA RUI
SONG XIAOGUO
BAI JIE
CHEN QIANG
Du Weizhe
Cong Ziran
SHI ZHIFENG

Assignees

哈尔滨工业大学
北京动力机械研究所

Dates

Publication Date: 20260512
Application Date: 20260228

Claims (10)

1. A method of inhibiting deformation of a nickel-based superalloy different angle suspension region component comprising the steps of: acquiring a component model and slicing the component model to obtain a plurality of slice models; Dividing each slice model into an unsupported overhanging region and a solid region based on a plurality of slice models, wherein the overhanging angle of the unsupported overhanging region of the component model is 20-45 degrees; Setting laser selective melting forming parameters of the unsupported overhanging region and laser selective melting forming parameters of the solid region, wherein the heat input of the unsupported overhanging region is lower than that of the solid region; And paving nickel-base alloy powder layer by layer based on the forming parameters of the unsupported overhanging region and the forming parameters of the solid region, forming the solid region on each layer of nickel-base alloy powder by a laser selective melting device, then performing discontinuous forming of the unsupported overhanging region, and repeating the steps in sequence until the laser selective melting device finishes laser melting forming of all layers of nickel-base alloy powder, thereby obtaining the nickel-base alloy unsupported member.
2. The method of suppressing deformation of a nickel-base superalloy different angle overhang region member according to claim 1, wherein the step of forming the solid region first and then intermittently forming the unsupported overhang region of each layer of the nickel-base alloy powder by a laser selective melting device comprises: Scanning the nickel-based alloy powder corresponding to the solid area of each layer through the laser selective melting device to form the solid area of the layer; And scanning the nickel-based alloy powder corresponding to the unsupported overhanging region of each layer for multiple times by the laser selective melting device to discontinuously form the unsupported overhanging region of the layer, wherein two adjacent scans in the multiple scans are separated by a preset time.
3. The deformation inhibiting method for a nickel-based superalloy different-angle suspension region member according to claim 2, wherein the preset time is in a range of 5ms to 150ms.
4. The deformation inhibiting method for a nickel-base superalloy different-angle suspension region member according to claim 2, wherein scanning directions of adjacent two of the plurality of scans are opposite.
5. The method of claim 1, wherein the nickel-based alloy powder comprises, by mass, 20% -24% of Cr, 13% -15% of W, 1% -3% of Mo, 0.05% -0.2% of C, 0.2% -0.5% of Si, 0.2% -1% of Mn, 2% -4% of Co, 0.01% -0.1% of La, 1% -3% of Fe, less than 1% of Al, less than 0.1% of Ti, less than 0.5% of Cu, less than 0.01% of B, and the balance of Ni and unavoidable impurities.
6. The method of deformation suppression for nickel-base superalloy different angle overhang region components of claim 1, wherein prior to the step of acquiring a component model and slicing the component model, the method further comprises: drying nickel-base alloy powder with the particle size of 15-53 mu m in a vacuum environment-friendly drying oven, and safely storing for later use; designing a component model in three-dimensional software, wherein an overhang angle of an unsupported overhang region of the component model is 20 ° 45°。
7. The method of deformation suppression for nickel-base superalloy different angle overhang region members according to claim 1, wherein the step of dividing each of the slice models into an unsupported overhang region and a solid region based on a plurality of the slice models specifically comprises: Determining, based on a plurality of the slice models, a projected length and an overhang region angle of each of the slice models relative to adjacent slice models; Each of the slice models is divided into the unsupported overhanging region and the solid region based on the projected length and the overhanging region angle.
8. The method of deformation inhibition for nickel-base superalloy different angle suspension region components according to claim 1, wherein the step prior to laying the nickel-base alloy powder layer by layer comprises: and prefabricating the dried nickel-based alloy powder in a powder feeding cabin, placing the cleaned substrate in a lifting table of a forming cabin, closing all cabin doors, introducing argon into the forming cabin until the oxygen content is lower than 100ppm, and preheating the substrate to 90-110 ℃.
9. The method for inhibiting deformation of a nickel-based superalloy different-angle suspension region component according to claim 1, wherein the laser selective melting forming parameters of the unsupported suspension region comprise suspension laser power, suspension scanning speed and suspension scanning interval, the suspension laser power is 160-210W, the suspension scanning speed is 700-1200 mm/s, the suspension scanning interval is 0.07-0.12 mm, the laser scanning strategy of the unsupported suspension region is integral scanning, the laser selective melting forming parameters of the solid region comprise solid laser power, solid scanning speed and solid scanning interval, the solid laser power is 185W-235W, the solid scanning speed is 600-1000 mm/s, the solid scanning interval is 0.07-0.12 mm, the laser scanning strategy of the solid region is cross-shaped scanning, and the thickness of each layer of nickel-based alloy powder is 0.0205-0.02 mm.
10. The method of deformation suppression for nickel-base superalloy different angle overhang region members as recited in claim 1, wherein the step of setting the laser selective melt forming parameters of the unsupported overhang region and the laser selective melt forming parameters of the solid region comprises: inputting a plurality of slice models, laser selective melting forming parameters of the unsupported overhanging region and laser selective melting forming parameters of the solid region into the laser selective melting device to obtain a pre-demonstration nickel-based alloy unsupported member model; And determining that the laser selective melting forming parameters and the slicing model are correct based on the fact that the model of the nickel-based alloy non-support member predicted meets the standard.

Description

Deformation inhibition method for nickel-based superalloy component in suspension area with different angles Technical Field The application relates to the technical field of laser additive manufacturing, in particular to a deformation inhibition method for components in suspension areas with different angles of nickel-based superalloy. Background With the progress of industrial technology and iterative upgrading of products in the current society, the structural complexity of the components is increased year by year, the number of customized components is gradually increased, and the current traditional industrial manufacturing and processing capacity cannot meet the production requirements of the components with gradually complicated structures. The laser powder bed melting (LPBF) technology provides brand new possibility for integrated manufacturing of complex geometric structures by virtue of the advantages of high precision and high design freedom, and becomes a key technology for rapid iteration and customized production of precise parts. However, when laser powder beds form overhang structures below 45 °, it is often necessary to add support structures to ensure the quality of the formation. For some components with conformal inner runners or complex inner cavities, a supporting structure cannot be added due to the structural specificity, so that the problem of buckling deformation occurs in the forming process. Disclosure of Invention In view of the foregoing, it is necessary to provide a deformation suppression method for nickel-base superalloy different-angle overhang region members, so as to suppress buckling deformation occurring in the forming process of nickel-base alloy unsupported members, and realize lower-breadth roughness control of the nickel-base alloy unsupported members on the basis of not reducing the forming density of the nickel-base alloy unsupported members and being suitable for current market equipment. The embodiment of the application provides a deformation inhibition method for components of suspension areas with different angles of nickel-based superalloy, which comprises the following steps: acquiring a component model and slicing the component model to obtain a plurality of slice models; Dividing each slice model into an unsupported overhanging region and a solid region based on a plurality of slice models, wherein the overhanging angle of the unsupported overhanging region of the component model is 20-45 degrees; Setting laser selective melting forming parameters of the unsupported overhanging region and laser selective melting forming parameters of the solid region, wherein the heat input of the unsupported overhanging region is lower than that of the solid region; And paving nickel-base alloy powder layer by layer based on the forming parameters of the unsupported overhanging region and the forming parameters of the solid region, forming the solid region on each layer of nickel-base alloy powder by a laser selective melting device, then performing discontinuous forming of the unsupported overhanging region, and repeating the steps in sequence until the laser selective melting device finishes laser melting forming of all layers of nickel-base alloy powder, thereby obtaining the nickel-base alloy unsupported member. In some embodiments, the step of forming the solid region of the nickel-base alloy powder of each layer by a laser selective melting apparatus followed by the step of intermittently forming the unsupported overhanging region comprises: Scanning the nickel-based alloy powder corresponding to the solid area of each layer through the laser selective melting device to form the solid area of the layer; And scanning the nickel-based alloy powder corresponding to the unsupported overhanging region of each layer for multiple times by the laser selective melting device to discontinuously form the unsupported overhanging region of the layer, wherein two adjacent scans in the multiple scans are separated by a preset time. In some embodiments, the preset time is in a range of 5ms to 150ms. In some embodiments, the scan directions of adjacent two of the multiple scans are opposite. In some embodiments, the nickel-based alloy powder comprises, by mass, 20% -24% of Cr, 13% -15% of W, 1% -3% of Mo, 0.05% -0.2% of C, 0.2% -0.5% of Si, 0.2% -1% of Mn, 2% -4% of Co, 0.01-0.1% of La, 1% -3% of Fe, less than 1% of Al, less than 0.1% of Ti, less than 0.5% of Cu, less than 0.01% of B, and the balance of Ni element and unavoidable impurities. In some embodiments, prior to the step of acquiring a component model and slicing the component model, the method further comprises: drying nickel-base alloy powder with the particle size of 15-53 mu m in a vacuum environment-friendly drying oven, and safely storing for later use; designing a component model in three-dimensional software, wherein an overhang angle of an unsupported overhang region of the component model is 20 ° 45°。 In some emb