Heat treatment method of GH3536 high-temperature alloy for additive manufacturing

A technology of GH3536 and heat treatment method, applied in the field of heat treatment of GH3536 superalloy for additive manufacturing, can solve problems such as unfavorable industrial application, low production efficiency, complicated heat treatment method steps, etc., and achieve good industrial application prospects and high production efficiency. Effect

Pending Publication Date: 2021-06-29
无锡飞而康新材料科技有限公司
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Problems solved by technology

[0004] CN110846600 A discloses a multi-step recovery heat treatment method for additively manufacturing single-crystal nickel-based superalloys. The method includes the following steps: cleaning the surface miscellaneous crystal layer introduced in the additive manufacturing process for additively manufacturing single-crystal nickel-based superalloys, Determine the γ′ phase volume fraction of the additively manufactured single crystal nickel-based superalloy at room temperature, and the γ′ phase volume fraction is the temperature value corresponding to the first percentage of the γ′ phase volume fraction at room temperature as the step-temperature, and at The step 1 temperature is kept for the first time, and the temperature corresponding to the γ′ phase volume fraction decreased by the second percentage is used as the step 2 temperature, and the step 2 temperature is kept for the second time, and the cycle is continued until the temperature rises to γ 'When the phase volume fraction reaches the temperature range corresponding to the third percentage, hold the temperature for the Mth time at the step temperature, M is a natural number, and the additively manufactured single crystal nickel-based superalloy after the step recovery heat treatment is subjected to standard heat treatment to obtain a single crystal Nickel-based superalloy; the heat treatment method has complicated steps and a long time, which is not conducive to industrial application
[0005] CN109014215 A discloses a heat treatment method for additively manufacturing single crystal nickel-based superalloys, the method comprising: carrying out solution heat treatment, aging heat treatment and cooling of the additively manufactured single crystal nickel-based superalloys to be processed in a heat treatment furnace Steps, and slice samples of the treated additively manufactured single-crystal nickel-based superalloy, combine microstructure characterization and crystal orientation analysis, and judge the heat treatment according to the size of the γ′ phase and whether recrystallization occurs in the heat-affected zone and the epitaxial growth zone Method effect; this method needs to carry out two cooling treatments and two aging heat treatments, the time is long, and the production efficiency is low

Method used

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  • Heat treatment method of GH3536 high-temperature alloy for additive manufacturing
  • Heat treatment method of GH3536 high-temperature alloy for additive manufacturing
  • Heat treatment method of GH3536 high-temperature alloy for additive manufacturing

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Effect test

Embodiment 1

[0077] This embodiment provides a heat treatment method for GH3536 superalloy for additive manufacturing, the heat treatment method comprising the following steps:

[0078] (1) Use compressed air to blow the surface and inner cavity of the GH3536 superalloy for additive manufacturing to remove powder, then fix it on the steel plate with bolts, put it in a hot isostatic pressing furnace, and evacuate to an absolute pressure of 10 -3 Pa, argon gas was introduced, and the temperature was raised to 1210°C at a rate of 8°C / min, then the absolute pressure was adjusted to 160MPa, and kept for 2 hours; then the temperature was lowered to 100°C at a rate of 3°C / min;

[0079] (2) Put the GH3536 superalloy for additive manufacturing after cooling in step (1) into a vacuum heat treatment furnace, and evacuate to an absolute pressure of 10 -3 Pa, then raise the temperature to 1050°C at a rate of 8°C / min, hold for 30 minutes, then raise the temperature to 1150°C at a rate of 5°C / min, and h...

Embodiment 2

[0082] This embodiment provides a heat treatment method for GH3536 superalloy for additive manufacturing, the heat treatment method comprising the following steps:

[0083] (1) Use compressed nitrogen to purge the surface and inner cavity of the GH3536 superalloy for additive manufacturing to remove powder, then fix it on the steel plate with bolts, put it into a hot isostatic pressing furnace, and evacuate to an absolute pressure of 10 -4 Pa, pass in argon, and raise the temperature to 1180°C at a rate of 12°C / min, then adjust the absolute pressure to 170MPa, keep the temperature for 3h; then cool down to 90°C at a rate of 2°C / min;

[0084] (2) Put the GH3536 superalloy for additive manufacturing after cooling in step (1) into a vacuum heat treatment furnace, and evacuate to an absolute pressure of 10 -4Pa, then raise the temperature to 1020°C at a rate of 12°C / min, hold for 15 minutes, then raise the temperature to 1220°C at a rate of 8°C / min, and hold for 1 hour; finally c...

Embodiment 3

[0086] This embodiment provides a heat treatment method for GH3536 superalloy for additive manufacturing, the heat treatment method comprising the following steps:

[0087] (1) Use compressed air to blow the surface and inner cavity of the GH3536 superalloy for additive manufacturing to remove powder, then fix it on the steel plate with bolts, put it in a hot isostatic pressing furnace, and evacuate to an absolute pressure of 10 -4 Pa, pass in argon, and raise the temperature to 1170°C at a rate of 10°C / min, then adjust the absolute pressure to 140MPa, keep the temperature for 4h; then cool down to 95°C at a rate of 6°C / min;

[0088] (2) Put the GH3536 superalloy for additive manufacturing after cooling in step (1) into a vacuum heat treatment furnace, and evacuate to an absolute pressure of 10 -4 Pa, then raise the temperature to 900°C at a rate of 10°C / min, hold for 5 minutes, then raise the temperature to 1230°C at a rate of 6°C / min, and hold for 2 hours; finally cool down...

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Abstract

The invention provides a heat treatment method of a GH3536 high-temperature alloy for additive manufacturing. The heat treatment method comprises the following steps of carrying out hot isostatic pressing treatment on the GH3536 high-temperature alloy in a protective atmosphere, and then carrying out primary cooling treatment; and carrying out solution treatment and secondary cooling treatment on the cooled GH3536 high-temperature alloy under the vacuum condition, and then carrying out tertiary cooling treatment. According to the heat treatment method provided by the invention, by controlling the process conditions in the heat treatment process, the performance of the GH3536 high-temperature alloy for additive manufacturing is improved and is close to the level of a forged piece, and the good industrial application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a heat treatment method for a GH3536 superalloy used in additive manufacturing. Background technique [0002] Additive manufacturing, often referred to as 3D printing, is widely used in aerospace, medical and other fields. Because its molding process is formed by layer-by-layer accumulation of powder or wire materials, it has the advantages of high material utilization rate and short product production and development cycle. At the same time, there is almost no restriction on the shape of the product, and it can be directly formed into grids, cavities, etc. Complex structure, so it is often used to manufacture parts with complex shapes and difficult machining. At present, the additive manufacturing technology using high-energy beam as the heat source is the main development direction of rapid prototyping of metal parts. [0003] Nickel-based superallo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/64C22F1/10C22F1/02C21D11/00B22F10/66B22F3/15B22F3/24B33Y40/20B33Y80/00
CPCB22F3/24C22F1/10C22F1/02C21D11/005B22F3/15B33Y40/20B33Y80/00B22F2003/248B22F2201/20B22F2201/02B22F2201/11B22F2998/00
Inventor 高桦刘慧渊计霞陈志茹汪承杰周耀肖静宇沈于蓝余佩鸿
Owner 无锡飞而康新材料科技有限公司
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