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Brazing and aging integrated treatment process for GH4099 nickel-based high-temperature alloy

A nickel-based superalloy, GH4099 technology, applied in the field of brazing and aging integrated treatment process, can solve the problems of slow cooling, affecting the effect of aging strengthening, low strength of nickel-based superalloy, etc., to improve the strength, enhance the aging strengthening effect, The effect of fewer process steps

Active Publication Date: 2021-08-24
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the brazing temperature is close to the solid solution temperature, the state after brazing is treated as a solid solution state and then subjected to an aging process, so that the strengthening phase is precipitated again, which is an existing technical means to improve the strength, but the vacuum brazing process cools down Slow, affecting the subsequent aging strengthening effect, so that the strength of GH4099 nickel-based superalloy after brazing is still low

Method used

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  • Brazing and aging integrated treatment process for GH4099 nickel-based high-temperature alloy
  • Brazing and aging integrated treatment process for GH4099 nickel-based high-temperature alloy
  • Brazing and aging integrated treatment process for GH4099 nickel-based high-temperature alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The composition of the GH4099 nickel-based superalloy used in this example is as follows: C 0.03wt%, Cr 18.6wt%, Fe 0.8wt%, Co 6.3wt%, W 5.8wt%, Mo 4.0wt%, Al 2.1wt% , Ti 1.2wt%, the balance being Ni.

[0051] as per figure 2 The process curve shown is an integrated treatment of brazing and aging for the GH4099 nickel-based superalloy, including the following steps:

[0052] (1) heating the GH4099 nickel-based superalloy to a solution temperature of 1080° C., performing solution treatment for 20 minutes, and cooling to room temperature by air to obtain the solution-treated GH4099 nickel-based superalloy;

[0053] (2) Place the GH4099 nickel-based superalloy after the solution treatment in a vacuum brazing furnace, heat up to a preheating temperature of 940° C. in 1.5 hours, and preheat and keep it warm for 40 minutes;

[0054] The preheating temperature is raised to the brazing temperature of 1070° C. within 10 minutes, and the preheated GH4099 nickel-based superallo...

Embodiment 2

[0059] The composition of GH4099 nickel-based superalloy is as follows: C 0.03wt%, Cr 18.6wt%, Fe 0.8wt%, Co6.3wt%, W 5.8wt%, Mo 4.0wt%, Al 2.1wt%, Ti 1.2wt%, The balance is Ni.

[0060] as per figure 2 The process curve shown is an integrated treatment of brazing and aging for the GH4099 nickel-based superalloy, including the following steps:

[0061] (1) heating the GH4099 nickel-based superalloy to a solution temperature of 1100° C., performing solution treatment for 30 minutes, and cooling to room temperature by air to obtain the solution-treated GH4099 nickel-based superalloy;

[0062] (2) Place the GH4099 nickel-based superalloy after the solution treatment in a vacuum brazing furnace, heat up to a preheating temperature of 940° C. in 2.5 hours, and preheat and keep it warm for 60 minutes;

[0063] The preheating temperature is raised to the brazing temperature of 1060° C. within 30 minutes, and the preheated GH4099 nickel-based superalloy is brazed with BNi73CrFeSiB ...

Embodiment 3

[0067] The composition of GH4099 nickel-based superalloy is as follows: C 0.03wt%, Cr 18.6wt%, Fe 0.8wt%, Co6.3wt%, W 5.8wt%, Mo 4.0wt%, Al 2.1wt%, Ti 1.2wt%, The balance is Ni.

[0068] as per figure 2 The process curve shown is an integrated treatment of brazing and aging for the GH4099 nickel-based superalloy, including the following steps:

[0069] (1) heating the GH4099 nickel-based superalloy to a solution temperature of 1080° C., performing solution treatment for 20 minutes, and cooling to room temperature by air to obtain the solution-treated GH4099 nickel-based superalloy;

[0070] (2) Place the GH4099 nickel-based superalloy after the solution treatment in a vacuum brazing furnace, heat up to a preheating temperature of 950° C. in 3.5 hours, and preheat and keep it warm for 100 minutes;

[0071] The preheating temperature is raised to the brazing temperature of 1080° C. within 30 minutes, and the preheated GH4099 nickel-based superalloy is brazed for 10 minutes us...

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Abstract

The invention relates to a brazing and aging integrated treatment process for a GH4099 nickel-based high-temperature alloy. A method comprises the steps that solution treatment is carried out on the GH4099 nickel-based high-temperature alloy, and the GH4099 nickel-based high-temperature alloy subjected to solution treatment is obtained; the GH4099 nickel-based high-temperature alloy subjected to solution treatment is heated to brazing temperature to be subjected to brazing treatment, and the GH4099 nickel-based high-temperature alloy which still has the brazing temperature after brazing treatment is completed is obtained; and the GH4099 nickel-based high-temperature alloy at the brazing temperature is cooled to aging temperature, aging treatment is carried out at the aging temperature, and therefore heat treatment of the GH4099 nickel-based high-temperature alloy is completed. According to the scheme, the strength of the brazed GH4099 nickel-based high-temperature alloy can be improved to 1000 MPa or above, the number of process steps is smaller, and the process is more energy-saving and economical.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metals, in particular to a brazing and aging integrated treatment process for GH4099 nickel-based superalloy. Background technique [0002] Superalloys refer to a class of metal materials based on iron, nickel, and cobalt, which can work for a long time at high temperatures above 600°C and under certain stresses; and have high high-temperature strength, good oxidation resistance and corrosion resistance. Good fatigue performance, fracture toughness and other comprehensive properties. Among them, solid solution strengthened superalloys are widely used in high temperature, high thermal stress but low mechanical stress working conditions due to their good long-term high temperature stability, surface stability, good machinability and welding performance. Among such alloys, nickel-based superalloys are widely used in aero-engines and gas turbines. [0003] GH4099 is an aging-strengthened superal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/10
Inventor 丁宇升彭海春宋鹏陈明胡正阳梁岳莹
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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