Heat treatment method for GH4061 and 3D printing GH4169 material assembly

Abstract

The invention discloses a heat treatment method for a GH4061 and 3D printing GH4169 material assembly. The heat treatment method comprises the following steps: S1, carrying out solid solution heat treatment on a GH4061 alloy; s2, the 3D printing GH4169 material is subjected to annealing and homogenization treatment; and S3, synergistic aging heat treatment is conducted on the GH4061 alloy subjected to solid solution heat treatment and the 3D printing GH4169 material subjected to annealing and homogenizing treatment, the synergistic aging heat treatment comprises first-stage aging treatment and second-stage aging treatment which are sequentially conducted, and air cooling is conducted after each stage of aging treatment. The production efficiency is effectively improved, the production cost is reduced, the production requirement is met, and important economic benefits are achieved.

Description

Technical Field

[0001] This invention relates to a heat treatment method for a combination of GH4061 and 3D printed GH4169 materials, belonging to the field of alloy heat treatment technology. Background Technology

[0002] With the continuous development of my country's aerospace industry, the requirements for aerospace engines are also increasing. To meet the demands of complex operating conditions, components often need to be composed of different materials, such as combining GH4061 with 3D-printed GH4169. Although using dissimilar materials to combine components can meet complex operating conditions, how to improve the comprehensive mechanical properties of dissimilar material assemblies through heat treatment has become a new challenge. Therefore, a synergistic heat treatment regime for dissimilar material assemblies of GH4061 alloy and 3D-printed GH4169 alloy is needed to fill this gap. Summary of the Invention

[0003] The purpose of this invention is to overcome the aforementioned deficiencies and provide a heat treatment method for GH4061 and 3D-printed GH4169 material assemblies, filling the gap in the synergistic heat treatment system for dissimilar material assemblies of GH4061 alloy and 3D-printed GH4169 alloy. This invention effectively improves production efficiency, reduces production costs, meets production needs, and has significant economic benefits.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] A heat treatment method for a GH4061 and 3D printed GH4169 material assembly, comprising:

[0006] S1 is used to perform solution heat treatment on GH4061 alloy;

[0007] S2 performs annealing and homogenization treatment on GH4169 material for 3D printing;

[0008] S3 performs synergistic aging heat treatment on GH4061 alloy after solution heat treatment and 3D printed GH4169 material after annealing and homogenization treatment. The synergistic aging heat treatment includes a first-stage aging treatment and a second-stage aging treatment performed sequentially, followed by air cooling after each stage of aging treatment.

[0009] Furthermore, the method for solution heat treatment of GH4061 alloy in step S1 includes:

[0010] The solution heat treatment temperature is 1000–1100℃, and the holding time is 60–120 min.

[0011] Further, in step S1, the GH4061 alloy is subjected to solution heat treatment followed by air cooling.

[0012] Furthermore, the annealing temperature in step S2 is 580–620°C, and the annealing holding time is 270–330 min.

[0013] Furthermore, the homogenization temperature in step S2 is 950–1000℃, and the homogenization holding time is 60–120 min.

[0014] Furthermore, after annealing and homogenization in step S2, the samples are air-cooled.

[0015] Furthermore, in step S3, the first-stage aging treatment temperature is 690–740℃, and the holding time is 480–600 min.

[0016] Furthermore, in step S3, the secondary aging treatment temperature is 620-660℃, and the holding time is 480-600 min.

[0017] This invention discloses a synergistic heat treatment method for GH4061 alloy and 3D-printed GH4169 alloy. The method includes: firstly, solution heat treatment of GH4061 alloy, followed by annealing and homogenization heat treatment of 3D-printed GH4169 alloy; then, simultaneous aging heat treatment of both alloys in the same furnace to improve their strength and meet application requirements. The solution heat treatment regime for GH4061 is 1010℃ for 1 hour followed by air cooling; the annealing and homogenization heat treatment regime for 3D-printed GH4169 is annealing at 600℃ for 5 hours followed by air cooling, and homogenization at 980℃ for 1 hour followed by air cooling. Finally, the final product is obtained through a synergistic aging heat treatment of the two alloys. This invention can simultaneously improve the mechanical properties of both GH4061 alloy and 3D-printed GH4169 alloy, meeting production needs.

[0018] Compared with the prior art, the present invention has at least one of the following advantages:

[0019] (1) This invention effectively improves the comprehensive mechanical properties of materials by designing a synergistic heat treatment system for dissimilar material assemblies of GH4061 alloy and 3D printed GH4169 alloy.

[0020] (2) The pass rate of the first heat treatment of the GH4061 alloy and the 3D printed GH4169 alloy of the present invention reaches 100%. Attached Figure Description

[0021] Figure 1 The microstructure of GH4061 after heat treatment in Example 1 is shown in (a) and (b), which are light micrographs of different locations, and electron micrographs of different locations.

[0022] Figure 2The microstructure of GH4169 3D printed under heat treatment in Example 1 is shown in (a) and (b), which are light micrographs of the microstructure at different locations, and (c) and (d), which are electron micrographs of the microstructure at different locations.

[0023] Figure 3 The microstructure of GH4061 after heat treatment in Example 2 is shown in (a) and (b), which are light micrographs of different locations, and electron micrographs of different locations.

[0024] Figure 4 Example 2: 3D printed GH4169 heat-treated microstructure; (a) and (b) are light micrographs of the tissue at different locations, and (c) and (d) are electron micrographs of the tissue at different locations.

[0025] Figure 5 The microstructure of heat-treated GH4061 in Example 3 is shown in (a) and (b) as light micrographs of different locations, and (c) and (d) as electron micrographs of different locations.

[0026] Figure 6 Example 3: 3D printed GH4169 heat-treated microstructure; (a) and (b) are light micrographs of different locations, and (c) and (d) are electron micrographs of different locations.

[0027] Figure 7 Tensile strength of GH4061 alloy in three examples at different tensile temperatures: (a) room temperature; (b) 650°C;

[0028] Figure 8 Non-proportional elongation strengths were specified for three examples of GH4061 alloys at different tensile temperatures: (a) room temperature; (b) 650°C;

[0029] Figure 9 Elongation after fracture of GH4061 alloy in three examples at different tensile temperatures: (a) room temperature; (b) 650°C;

[0030] Figure 10 The reduction of area of ​​GH4061 alloy in three examples at different stretching temperatures: (a) room temperature; (b) 650°C;

[0031] Figure 11 The impact toughness of GH4061 alloy at -196℃ in different embodiments;

[0032] Figure 12 Tensile strength of GH4169 alloy 3D printed in three examples at different stretching temperatures: (a) room temperature; (b) 650°C;

[0033] Figure 13Non-proportional elongation strengths were specified for 3D-printed GH4169 alloys in three examples at different stretching temperatures: (a) room temperature; (b) 650°C.

[0034] Figure 14 Elongation after fracture of GH4169 alloy 3D printed in three examples at different stretching temperatures: (a) room temperature; (b) 650°C;

[0035] Figure 15 The reduction of area of ​​GH4169 alloy in three examples at different stretching temperatures: (a) room temperature; (b) 650°C;

[0036] Figure 16 The room temperature impact toughness of GH4169 alloy 3D printed in different embodiments. Detailed Implementation

[0037] The features and advantages of the present invention will become clearer and more apparent from the following detailed description.

[0038] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0039] Both GH4061 and GH4169 alloys are precipitation-hardening nickel-based superalloys. GH4169 alloy uses the body-centered cubic γ″ phase as the main strengthening phase, while the face-centered cubic γ′ phase plays an auxiliary strengthening role. GH4061 alloy uses the γ′ phase as the main strengthening phase, supplemented by the γ″ phase.

[0040] According to the standard aging regime for 3D printed GH4169, the first-stage aging temperature is 720℃ with a holding time of 8 hours. The purpose is to precipitate the fine-sized γ″ phase at this temperature. The γ″ phase is a metastable phase of the body-centered tetragonal crystal system, which is disk-shaped and is the main strengthening phase of GH4169. The second-stage aging temperature is 620℃ with a holding time of 8 hours. At this temperature, GH4169 can precipitate the fine-sized γ′ phase, resulting in a strengthening effect.

[0041] Studies have shown that the precipitation temperature range of the γ″ phase is between 595℃ and 870℃, with the fastest precipitation occurring between 732℃ and 760℃; the precipitation temperature range of the γ′ phase is between 593℃ and 816℃. Therefore, adjusting the aging temperature within these ranges can meet the mechanical property requirements of both GH4061 alloy and 3D-printed GH4169 alloy after aging.

[0042] This invention provides a synergistic heat treatment process for dissimilar material assemblies of GH4061 alloy and 3D-printed GH4169 alloy. By employing this synergistic heat treatment process, the dissimilar material assemblies achieve the desired properties. Compared with previous processes, this effectively improves production efficiency, reduces production costs, meets production requirements, and yields significant economic benefits.

[0043] This invention relates to a synergistic heat treatment method for GH4061 alloy and 3D-printed GH4169 alloy, comprising:

[0044] Before the synergistic aging treatment of the two alloys, the GH4061 alloy was subjected to solution heat treatment, and the 3D-printed GH4169 alloy was subjected to annealing and homogenization treatment. Then, the two alloys were subjected to synergistic aging heat treatment. In particular, the first-stage aging and the second-stage aging were air-cooled, which can ensure the precipitation effect of the strengthening phase of the two alloys at the same time.

[0045] The solution treatment temperature for GH4061 alloy is 1000~1100℃.

[0046] The heat treatment holding time for GH4061 alloy is 60–120 min.

[0047] The GH4061 alloy is cooled by air after solution treatment.

[0048] The annealing temperature for 3D printing GH4169 alloy is 580~620℃.

[0049] The holding time for annealing GH4169 alloy for 3D printing is 270–330 min.

[0050] The 3D printed GH4169 alloy was cooled by air after annealing.

[0051] The homogenization temperature for 3D printing GH4169 alloy is 950–1000℃.

[0052] The holding time for homogenizing GH4169 alloy in 3D printing is 60-120 minutes.

[0053] The GH4169 alloy was homogenized and then cooled by air.

[0054] The synergistic aging heat treatment of GH4061 alloy and 3D printed GH4169 alloy is a secondary aging process.

[0055] The primary aging temperature for GH4061 alloy and 3D printed GH4169 alloy is 690–740℃.

[0056] The first-stage aging holding time for GH4061 alloy and 3D printed GH4169 alloy is 480-600 min.

[0057] Air cooling is installed between the first-stage and second-stage aging processes of GH4061 alloy and 3D-printed GH4169 alloy.

[0058] The secondary aging temperature for GH4061 alloy and 3D printed GH4169 alloy is 620–660℃.

[0059] The secondary aging holding time for GH4061 alloy and 3D printed GH4169 alloy is 480-600 min.

[0060] After the aging process, air cooling is set up.

[0061] Example:

[0062] Example 1

[0063] A heat treatment method for GH4061 alloy and 3D printed GH4169 alloy includes the following steps:

[0064] GH4061 bars with a specification of Φ15×300mm were selected. The composition is shown in Table 1.

[0065] Table 1. Chemical composition of GH4061 bars used in the experiment (remaining component: Ni).

[0066]

[0067] Before heat treatment, the shape, size and surface quality of the GH4061 bar sample should be checked, and dents and cracks are not allowed.

[0068] GH4061 bars were placed in a heat treatment furnace for solution heat treatment. The solution treatment process was to hold at 1010℃ for 60 minutes and then air-cool to room temperature after the heat treatment was completed.

[0069] In this embodiment, the microstructure of the GH4061 material after treatment was observed. Figure 1 As shown in Table 2, the mechanical properties of the GH4061 material after processing in this embodiment have been measured.

[0070] Table 2 Mechanical properties of GH4061 alloy in Example 1

[0071]

[0072] 3D printed GH4169 test pieces with specifications of Φ13×72mm tensile parts and 11×11×59mm impact specimens.

[0073] Before heat treatment, the shape, size and surface quality of the 3D printed GH4169 test piece should be checked, and no bumps or cracks are allowed.

[0074] The 3D printed GH4169 test piece was placed in a heat treatment furnace for annealing heat treatment. The annealing regime was a holding temperature of 600℃ and a holding time of 300min. After the holding time was completed, it was air-cooled to room temperature.

[0075] The 3D printed GH4169 test piece after annealing heat treatment was placed in a heat treatment furnace for homogenization heat treatment. The homogenization process was: holding temperature 980℃, holding time 60min, and air cooling to room temperature after holding.

[0076] The 3D printed GH4169 test piece after homogenization heat treatment was placed in a heat treatment furnace for aging heat treatment (at this time, it was heat treated in the same furnace as the GH4061 material). The aging regime was two-stage aging. The first stage of aging was a holding temperature of 710℃ and a holding time of 540min. After the holding time, it was air-cooled to room temperature. The second stage of aging was a holding temperature of 620℃ and a holding time of 540min. After the holding time, it was air-cooled to room temperature.

[0077] In this embodiment, the microstructure of the 3D-printed GH4169 material after processing was observed. Figure 2 As shown in Table 3, the mechanical properties of the 3D-printed GH4169 material after processing in this embodiment have been measured.

[0078] Table 3 Mechanical properties of GH4169 alloy in Example 1 (3D printing)

[0079]

[0080] Example 2

[0081] A heat treatment method for GH4061 alloy and 3D printed GH4169 alloy, with the same material composition, specifications, and alloy powder particle size distribution as in Example 1, specifically includes the following steps:

[0082] Before heat treatment, the shape, size and surface quality of the GH4061 bar sample should be checked, and dents and cracks are not allowed.

[0083] GH4061 bars were placed in a heat treatment furnace for solution heat treatment. The solution treatment process was to hold at 1010℃ for 60 minutes and then air-cool to room temperature after the heat treatment was completed.

[0084] In this embodiment, the microstructure of the GH4061 material after treatment was observed. Figure 3 As shown in Table 4, the mechanical properties of the GH4061 material after processing in this embodiment have been measured.

[0085] Table 4 Mechanical properties of GH4061 alloy in Example 2

[0086]

[0087] Before heat treatment, the shape, size and surface quality of the 3D printed GH4169 test piece should be checked, and no bumps or cracks are allowed.

[0088] The 3D printed GH4169 test piece was placed in a heat treatment furnace for annealing heat treatment. The annealing regime was a holding temperature of 600℃ and a holding time of 300min. After the holding time was completed, it was air-cooled to room temperature.

[0089] The 3D printed GH4169 test piece after annealing heat treatment was placed in a heat treatment furnace for homogenization heat treatment. The homogenization process was: holding temperature 980℃, holding time 60min, and air cooling to room temperature after holding.

[0090] The 3D printed GH4169 test piece after homogenization heat treatment was placed in a heat treatment furnace for aging heat treatment (at this time, it was heat treated in the same furnace as the GH4061 material). The aging regime was two-stage aging. The first stage of aging was a holding temperature of 710℃ and a holding time of 540min. After the holding time, it was air-cooled to room temperature. The second stage of aging was a holding temperature of 630℃ and a holding time of 540min. After the holding time, it was air-cooled to room temperature.

[0091] In this embodiment, the microstructure of the 3D-printed GH4169 material after processing was observed. Figure 4 As shown in Table 5, the mechanical properties of the 3D-printed GH4169 material after processing in this embodiment have been measured.

[0092] Table 5 Mechanical properties of GH4169 alloy 3D printed in Example 2

[0093]

[0094] Example 3

[0095] A heat treatment method for GH4061 alloy and 3D printed GH4169 alloy, with the same material composition, specifications, and alloy powder particle size distribution as in Example 1, specifically includes the following steps:

[0096] Before heat treatment, the shape, size and surface quality of the GH4061 bar sample should be checked, and dents and cracks are not allowed.

[0097] GH4061 bars were placed in a heat treatment furnace for solution heat treatment. The solution treatment process was to hold at 1010℃ for 60 minutes and then air-cool to room temperature after the heat treatment was completed.

[0098] In this embodiment, the microstructure of the GH4061 material after treatment was observed. Figure 5 As shown in Table 6, the mechanical properties of the GH4061 material after processing in this embodiment have been measured.

[0099] Table 6 Mechanical properties of GH4061 alloy in Example 3

[0100]

[0101] Before heat treatment, the shape, size and surface quality of the 3D printed GH4169 test piece should be checked, and no bumps or cracks are allowed.

[0102] The 3D printed GH4169 test piece was placed in a heat treatment furnace for annealing heat treatment. The annealing regime was a holding temperature of 600℃ and a holding time of 300min. After the holding time was completed, it was air-cooled to room temperature.

[0103] The 3D printed GH4169 test piece after annealing heat treatment was placed in a heat treatment furnace for homogenization heat treatment. The homogenization process was: holding temperature 980℃, holding time 60min, and air cooling to room temperature after holding.

[0104] The 3D printed GH4169 test piece after homogenization heat treatment was placed in a heat treatment furnace for aging heat treatment (at this time, it was heat treated in the same furnace as the GH4061 material). The aging regime was two-stage aging. The first stage of aging was a holding temperature of 710℃ and a holding time of 480min. After the holding time, it was air-cooled to room temperature. The second stage of aging was a holding temperature of 630℃ and a holding time of 480min. After the holding time, it was air-cooled to room temperature.

[0105] In this embodiment, the microstructure of the 3D-printed GH4169 material after processing was observed. Figure 6 As shown in Table 7, the mechanical properties of the 3D-printed GH4169 material after processing in this embodiment have been measured.

[0106] Table 7 Mechanical properties of GH4169 alloy 3D printed in Example 2

[0107]

[0108] Comparing Examples 1, 2, and 3, the average mechanical properties of each group were plotted. Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The image shows GH4061 alloy, in which... Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16This example uses 3D-printed GH4169 alloy. Comparing the three sets of examples, it can be found that Example 1, compared to Example 2, only has a lower secondary aging temperature, while Example 3, compared to Example 2, only has a shorter holding time for both primary and secondary aging. From the comparison of mechanical properties, it can be seen that Example 1 has better overall comprehensive mechanical properties, Example 2 has superior high-temperature mechanical properties, and Example 3 has better toughness. The above examples illustrate that the mechanical properties required in actual industrial production can be obtained through synergistic heat treatment of different GH4061 and 3D-printed GH4169 alloys.

[0109] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

[0110] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A heat treatment method for a GH4061 and 3D printed GH4169 material assembly, characterized in that, include: S1 is used to perform solution heat treatment on GH4061 alloy; S2 performs annealing and homogenization treatment on GH4169 material for 3D printing; S3 performs synergistic aging heat treatment on GH4061 alloy after solution heat treatment and 3D printed GH4169 material after annealing and homogenization treatment. The synergistic aging heat treatment includes a first-stage aging treatment and a second-stage aging treatment performed sequentially, followed by air cooling after each stage of aging treatment.

2. The heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, Step S1, the method for solution heat treatment of GH4061 alloy, includes: The solution heat treatment temperature is 1000–1100℃, and the holding time is 60–120 min.

3. The heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, Step S1 involves solution heat treatment of the GH4061 alloy followed by air cooling.

4. The heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, The annealing temperature in step S2 is 580–620℃, and the annealing holding time is 270–330 min.

5. The heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, The homogenization temperature in step S2 is 950–1000℃, and the homogenization holding time is 60–120 min.

6. The heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, After annealing and homogenization in step S2, the samples were air-cooled.

7. The heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, In step S3, the first-stage aging treatment temperature is 690–740℃, and the holding time is 480–600 min.

8. A heat treatment method for a GH4061 and 3D printed GH4169 material assembly according to claim 1, characterized in that, In step S3, the secondary aging treatment temperature is 620-660℃, and the holding time is 480-600 min.

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