High-temperature alloy thin-wall cylindrical part and manufacturing method thereof

Abstract

The invention discloses a high-temperature alloy thin-wall cylindrical part and a manufacturing method thereof. The manufacturing method comprises the steps that a three-dimensional model of the thin-wall cylindrical part is established; grid division is conducted on the three-dimensional model of the thin-walled cylindrical part, and a three-dimensional grid model of the thin-walled cylindrical part is obtained; material parameters and 3D printing process parameters are determined; heat treatment simulation optimization is conducted according to the three-dimensional mesh model and the material parameters of the thin-walled cylindrical part, and final heat treatment process parameters are obtained; 3D printing is conducted according to the three-dimensional mesh model, the material parameters and the 3D printing process parameters of the thin-wall cylindrical part, and a middle thin-wall cylindrical part is obtained; and carrying out heat treatment on the middle thin-wall cylindrical part according to the final heat treatment process parameters to obtain the final thin-wall cylindrical part. According to the method, deformation of the final thin-wall cylindrical part can be reduced by simulating and optimizing the heat treatment process, meanwhile, it is guaranteed that the size of the final thin-wall cylindrical part is not changed, existing equipment does not need to be changed, and the workload of follow-up treatment is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing high-temperature alloy thin-walled cylindrical parts, and in particular to a high-temperature alloy thin-walled cylindrical part and a manufacturing method thereof. Background Art

[0002] In the additive manufacturing process, in order to eliminate the residual stress inside the parts, heat treatment is required after printing to prevent subsequent deformation of the parts. The heat treatment process is an important basic process. Through heating, insulation and different cooling processes, the internal structure of the material changes and the residual stress is released to obtain the required mechanical properties. However, in actual production, metal materials are deformed due to the influence of stress during the heat treatment of parts, and the judgment of the deformation trend mainly relies on experience, which is difficult to effectively control, especially for thin-walled parts. The thickness of such parts is quite different from the cross-sectional size, the relative stiffness is low, the precision requirements are high, the wall thickness is thin, the bending resistance is low, and the deformation problem during the heat treatment process is more serious. In addition, the correction process after deformation is complicated and difficult to operate, which is a bottleneck problem in the part production process. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a high-temperature alloy thin-walled cylindrical part and a manufacturing method thereof.

[0004] The present invention provides a method for manufacturing a high-temperature alloy thin-walled cylindrical part, comprising:

[0005] Establish a three-dimensional model of thin-walled cylindrical parts;

[0006] Meshing the three-dimensional model of the thin-walled cylindrical part to obtain a three-dimensional mesh model of the thin-walled cylindrical part;

[0007] Determine material parameters and 3D printing process parameters;

[0008] Perform heat treatment simulation optimization based on the 3D mesh model and material parameters of the thin-walled cylindrical part to obtain the final heat treatment process parameters;

[0009] Perform 3D printing according to the 3D mesh model, material parameters and 3D printing process parameters of the thin-walled cylindrical part to obtain an intermediate thin-walled cylindrical part;

[0010] The intermediate thin-walled cylindrical part is heat treated according to the final heat treatment process parameters to obtain the final thin-walled cylindrical part.

[0011] Preferably, heat treatment simulation optimization is performed based on the three-dimensional mesh model and material parameters of the thin-walled cylindrical part to obtain the final heat treatment process parameters, specifically including:

[0012] Set the adjustment range of heat treatment process parameters;

[0013] Heat treatment simulation is performed according to the three-dimensional mesh model of the thin-walled cylindrical part, material parameters and the adjustment range of the heat treatment process parameters to obtain intermediate heat treatment simulation results; and the heat treatment process parameters corresponding to the intermediate heat treatment simulation results with the smallest deformation in the intermediate heat treatment simulation results are used as the final heat treatment process parameters.

[0014] Preferably, the heat treatment process parameters include: annealing temperature, cooling rate and holding time.

[0015] Preferably, the heat treatment process parameters include: the adjustment range of the annealing temperature is 650°C to 1050°C, the adjustment range of the holding time is 1h to 4h, and the adjustment range of the cooling rate is 50-200°C / h.

[0016] Preferably, a heat treatment simulation is performed according to the three-dimensional mesh model of the thin-walled cylindrical part, the material parameters and the adjustment range of the heat treatment process parameters to obtain an intermediate heat treatment simulation result, and the heat treatment process parameters corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result are used as the final heat treatment process parameters, specifically including:

[0017] Under the condition that the holding time and the cooling rate remain unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the annealing temperature, and the annealing temperature corresponding to the intermediate heat treatment simulation result with the smallest deformation among the intermediate heat treatment simulation results is used as the final annealing temperature;

[0018] When the annealing temperature is the final annealing temperature and the cooling rate is unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the holding time, and the holding time corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation results is taken as the final holding time;

[0019] When the annealing temperature is the final annealing temperature and the holding time is the final holding time, heat treatment simulation is performed under air cooling and gas cooling conditions according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part, and the cooling rate corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result is taken as the final cooling rate.

[0020] Preferably, the final heat treatment process parameters include: annealing temperature of 700° C., holding time of 1 h, and cooling rate of 200° C. / h.

[0021] Preferably, the thin-walled cylindrical member has a diameter of 120 mm, a height of 100 mm, and a wall thickness of 1 mm.

[0022] Preferably, the material parameter includes a material type, and the material type is GH4169.

[0023] Preferably, the 3D printing process parameters include: substrate preheating temperature of 100° C., laser power of 180 W, scanning speed of 850 mm / s, laser spot diameter of 60 μm, layer thickness of 30 μm, and scanning spacing of 0.08 mm.

[0024] The present invention also provides a high-temperature alloy thin-walled cylindrical part, which is manufactured using any of the above-mentioned methods for manufacturing a high-temperature alloy thin-walled cylindrical part.

[0025] In the present invention, the proposed high-temperature alloy thin-walled cylindrical part and its manufacturing method obtain the final heat treatment process parameters by heat treatment simulation optimization of the three-dimensional mesh model of the thin-walled cylindrical part, and heat treat the intermediate thin-walled cylindrical part printed by 3D according to the final heat treatment process parameters to obtain the final thin-walled cylindrical part. The present invention can reduce the deformation of the final thin-walled cylindrical part by simulating and optimizing the heat treatment process while ensuring that the size of the final thin-walled cylindrical part remains unchanged, without the need to modify the existing equipment, and effectively reducing the workload of subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic flow chart of a method for manufacturing a high-temperature alloy thin-walled cylindrical component in one embodiment of the present invention.

[0027] Figure 2 FIG. 1 is a relationship diagram between deformation and annealing temperature of an intermediate heat treatment simulation result in an embodiment of the present invention.

[0028] Figure 3 FIG. 1 is a relationship diagram between deformation and holding time of an intermediate heat treatment simulation result in an embodiment of the present invention.

[0029] Figure 4 FIG. 1 is a relationship diagram between the deformation amount and the cooling method of the intermediate heat treatment simulation result in one embodiment of the present invention. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Reference Figure 1 The present invention provides a method for manufacturing a high-temperature alloy thin-walled cylindrical part, comprising:

[0032] Establish a three-dimensional model of thin-walled cylindrical parts;

[0033] Meshing the three-dimensional model of the thin-walled cylindrical part to obtain a three-dimensional mesh model of the thin-walled cylindrical part;

[0034] Determine material parameters and 3D printing process parameters;

[0035] Perform heat treatment simulation optimization based on the three-dimensional mesh model and material parameters of the thin-walled cylindrical part to obtain the final heat treatment process parameters;

[0036] Perform 3D printing according to the 3D mesh model, material parameters and 3D printing process parameters of the thin-walled cylindrical part to obtain an intermediate thin-walled cylindrical part;

[0037] The intermediate thin-walled cylindrical part is heat treated according to the final heat treatment process parameters to obtain the final thin-walled cylindrical part.

[0038] The present invention performs heat treatment simulation optimization on the three-dimensional mesh model of the thin-walled cylindrical part to obtain the final heat treatment process parameters, and performs heat treatment on the intermediate thin-walled cylindrical part printed by 3D according to the final heat treatment process parameters to obtain the final thin-walled cylindrical part. The present invention can reduce the deformation of the final thin-walled cylindrical part by simulating and optimizing the heat treatment process while ensuring that the size of the final thin-walled cylindrical part remains unchanged, without the need to modify the existing equipment, and effectively reducing the workload of subsequent processing.

[0039] In order to reduce deformation, in this embodiment, heat treatment simulation optimization is performed based on the three-dimensional mesh model and material parameters of the thin-walled cylindrical part to obtain the final heat treatment process parameters, which specifically include:

[0040] Set the adjustment range of heat treatment process parameters;

[0041] Heat treatment simulation is performed according to the three-dimensional mesh model of the thin-walled cylindrical part, material parameters and the adjustment range of the heat treatment process parameters to obtain intermediate heat treatment simulation results; and the heat treatment process parameters corresponding to the intermediate heat treatment simulation results with the smallest deformation in the intermediate heat treatment simulation results are used as the final heat treatment process parameters.

[0042] Since the holding time, cooling rate, annealing temperature and other factors in the heat treatment process may cause heat treatment deformation, appropriate heat treatment parameters are of great significance for improving the printing accuracy of additive manufacturing, improving production level and reducing costs. In this embodiment, the heat treatment process parameters include: heating rate, annealing temperature, cooling rate and holding time.

[0043] Among them, heat treatment simulation is performed according to the three-dimensional mesh model of the thin-walled cylindrical part, the material parameters and the adjustment range of the heat treatment process parameters to obtain the intermediate heat treatment simulation results, and the heat treatment process parameters corresponding to the intermediate heat treatment simulation results with the smallest deformation in the intermediate heat treatment simulation results are used as the final heat treatment process parameters, specifically including:

[0044] Under the condition that the holding time and the cooling rate remain unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the annealing temperature, and the annealing temperature corresponding to the intermediate heat treatment simulation result with the smallest deformation among the intermediate heat treatment simulation results is used as the final annealing temperature;

[0045] When the annealing temperature is the final annealing temperature and the cooling rate is unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the holding time, and the holding time corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation results is taken as the final holding time;

[0046] When the annealing temperature is the final annealing temperature and the holding time is the final holding time, heat treatment simulation is performed under air cooling and gas cooling conditions according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part, and the cooling rate corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result is taken as the final cooling rate.

[0047] The annealing temperature is adjusted in the range of 650°C to 1050°C, the holding time is adjusted in the range of 1h to 4h, and the cooling rate is adjusted in the range of 50 to 200°C / h.

[0048] In this embodiment, the heat treatment simulation results include thermal stress, deformation, and deformation distribution cloud diagram.

[0049] Among them, thermal stress indicates the magnitude of stress generated in different areas; deformation indicates the actual deformation of each point; and the stress-deformation distribution cloud map is generated based on the deformation and thermal stress data. According to the numerical value of the deformation, the degree of deformation in each area can be evaluated. Large deformation areas usually indicate the presence of stress concentration or uneven heat treatment. The stress-deformation distribution cloud map shows the deformation and stress distribution in different areas. Areas with severe deformation are identified based on the deformation distribution cloud map. Therefore, this embodiment can determine the heat treatment parameters that need to be improved through the deformation values ​​shown in the figure: annealing temperature, cooling rate, and holding time to reduce deformation.

[0050] Therefore, the final heat treatment process parameters in this embodiment include: annealing temperature of 700° C., holding time of 1 h, and cooling rate of 200° C. / h.

[0051] In this embodiment, the thin-walled cylindrical member has a diameter of 120 mm, a height of 100 mm, and a wall thickness of 1 mm.

[0052] In this embodiment, the material parameter includes a material type, and the material type is GH4169.

[0053] In this embodiment, the 3D printing process parameters include: substrate preheating temperature, laser power, scanning speed, laser spot diameter, layer thickness and scanning spacing.

[0054] In this embodiment, the 3D printing process parameters include: substrate preheating temperature of 100° C., laser power of 180 W, scanning speed of 850 mm / s, laser spot diameter of 60 μm, layer thickness of 30 μm, and scanning spacing of 0.08 mm.

[0055] The present invention also provides a high-temperature alloy thin-walled cylindrical part, which is manufactured using any of the above-mentioned methods for manufacturing a high-temperature alloy thin-walled cylindrical part.

[0056] In this embodiment, a box-type resistance furnace is used for the actual heat treatment in this embodiment.

[0057] The present invention will be described below with reference to specific embodiments.

[0058] Example 1

[0059] like Figure 1 As shown, this embodiment provides a method for manufacturing a high-temperature alloy thin-walled cylindrical part, comprising the following steps:

[0060] S1. Use the 3D modeling software SolidWorks to build a 3D model of a thin-walled cylindrical part;

[0061] S2. Import the 3D model of the thin-walled cylindrical part into Simufact Additive, mesh the 3D model of the thin-walled cylindrical part, and obtain the 3D mesh model of the thin-walled cylindrical part.

[0062] S3. Input the determined material parameters and 3D printing process parameters into SimufactAdditive;

[0063] S4, performing heat treatment simulation optimization according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part to obtain the final heat treatment process parameters;

[0064] S5, performing 3D printing according to the three-dimensional mesh model, material parameters and 3D printing process parameters of the thin-walled cylindrical part to obtain an intermediate thin-walled cylindrical part;

[0065] S6. Heat-treating the intermediate thin-walled cylindrical part according to the final heat treatment process parameters to obtain the final thin-walled cylindrical part.

[0066] Among them, the diameter of the thin-walled cylindrical part is 120mm, the height is 100mm, and the wall thickness is 1mm.

[0067] In this embodiment, the material parameter includes a material type, and the material type is GH4169.

[0068] In this embodiment, the 3D printing process parameters include: substrate preheating temperature of 100° C., laser power of 180 W, scanning speed of 850 mm / s, laser spot diameter of 60 μm, layer thickness of 30 μm, and scanning spacing of 0.08 mm.

[0069] Among them, the heating rate in this embodiment is 10°C / min, the adjustment range of the annealing temperature is 650°C~1050°C, the adjustment range of the holding time is 1h~4h, the adjustment range of the cooling rate is 50~200°C / h, and the cooling method is air cooling.

[0070] In S4, a heat treatment simulation is performed according to the three-dimensional mesh model of the thin-walled cylindrical part, the material parameters, and the adjustment range of the heat treatment process parameters to obtain the intermediate heat treatment simulation results, including:

[0071] When the holding time and cooling rate remain unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the annealing temperature, and the annealing temperature corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result is used as the final annealing temperature, such as Figure 2 As shown;

[0072] When the annealing temperature is the final annealing temperature and the cooling rate is unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the holding time, and the holding time corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result is taken as the final holding time, such as Figure 3 As shown;

[0073] When the annealing temperature is the final annealing temperature and the holding time is the final holding time, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part under air cooling and gas cooling conditions, and the cooling rate corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result is taken as the final cooling rate, such as Figure 4 shown.

[0074] from Figure 2 It can be found that the deformation of the deformation distribution cloud diagram is the smallest at 700℃. Figure 3 It can be found that the deformation of the deformation distribution cloud diagram is the smallest when the insulation time is 1h. Figure 4 It can be found that the deformation distribution cloud diagram under the two cooling methods of air cooling and air cooling is the smallest in the case of air cooling. Therefore, the heat treatment process parameters selected in the actual heat treatment of this embodiment are: annealing temperature 700℃; holding time 1h; cooling method is air cooling, and a box-type resistance furnace is used in the actual heat treatment.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for manufacturing a high-temperature alloy thin-walled cylindrical part, characterized in that: include: Establish a three-dimensional model of thin-walled cylindrical parts; Meshing the three-dimensional model of the thin-walled cylindrical part to obtain a three-dimensional mesh model of the thin-walled cylindrical part; Determine material parameters and 3D printing process parameters; Perform heat treatment simulation optimization based on the 3D mesh model and material parameters of the thin-walled cylindrical part to obtain the final heat treatment process parameters; Perform 3D printing according to the 3D mesh model, material parameters and 3D printing process parameters of the thin-walled cylindrical part to obtain an intermediate thin-walled cylindrical part; The intermediate thin-walled cylindrical part is heat treated according to the final heat treatment process parameters to obtain the final thin-walled cylindrical part.

2. The method for manufacturing a high-temperature alloy thin-walled cylindrical part according to claim 1, characterized in that: According to the three-dimensional mesh model and material parameters of the thin-walled cylindrical parts, the heat treatment simulation optimization is carried out to obtain the final heat treatment process parameters, including: Set the adjustment range of heat treatment process parameters; Heat treatment simulation is performed according to the three-dimensional mesh model of the thin-walled cylindrical part, material parameters and the adjustment range of the heat treatment process parameters to obtain intermediate heat treatment simulation results, and the heat treatment process parameters corresponding to the intermediate heat treatment simulation results with the smallest deformation in the intermediate heat treatment simulation results are used as the final heat treatment process parameters.

3. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 2, characterized in that: Heat treatment process parameters include: annealing temperature, cooling rate and holding time.

4. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 3, characterized in that: The adjustment range of annealing temperature is 650℃~1050℃, the adjustment range of holding time is 1h~4h, and the adjustment range of cooling rate is 50~200℃ / h.

5. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 3, characterized in that: According to the three-dimensional mesh model of the thin-walled cylindrical part, the material parameters and the adjustment range of the heat treatment process parameters, a heat treatment simulation is performed to obtain an intermediate heat treatment simulation result, and the heat treatment process parameters corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result are used as the final heat treatment process parameters, specifically including: Under the condition that the holding time and the cooling rate remain unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the annealing temperature, and the annealing temperature corresponding to the intermediate heat treatment simulation result with the smallest deformation among the intermediate heat treatment simulation results is used as the final annealing temperature; When the annealing temperature is the final annealing temperature and the cooling rate is unchanged, heat treatment simulation is performed according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part within the adjustment range of the holding time, and the holding time corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation results is taken as the final holding time; When the annealing temperature is the final annealing temperature and the holding time is the final holding time, heat treatment simulation is performed under air cooling and gas cooling conditions according to the three-dimensional mesh model and material parameters of the thin-walled cylindrical part, and the cooling rate corresponding to the intermediate heat treatment simulation result with the smallest deformation in the intermediate heat treatment simulation result is taken as the final cooling rate.

6. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 3, characterized in that: The final heat treatment process parameters include: annealing temperature of 700°C, holding time of 1h, and cooling rate of 200°C / h.

7. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 1, characterized in that: The thin-walled cylindrical part has a diameter of 120 mm, a height of 100 mm and a wall thickness of 1 mm.

8. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 1, characterized in that: The material parameters include the material type, and the material type is GH4169.

9. The method for manufacturing a high temperature alloy thin-walled cylindrical part according to claim 1, characterized in that: The 3D printing process parameters include: substrate preheating temperature of 100 °C, laser power of 180 W, scanning speed of 850 mm / s, laser spot diameter of 60 μm, layer thickness of 30 μm, and scanning spacing of 0.08 mm.

10. A high temperature alloy thin-walled cylindrical part, characterized in that: The high-temperature alloy thin-walled cylindrical part is manufactured by the manufacturing method of any one of claims 1 to 9.

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