A kind of forging method of superalloy gh4099

A technology of GH4099 and high-temperature alloy, which is applied in the field of high-temperature alloy forging, can solve the problems of uneven heating of steel ingots, reduce hot-working plasticity, deformation cracking, etc., improve the distribution of carbides and grains, improve process performance and serviceability , Improve the effect of forging yield

Active Publication Date: 2022-07-26
宝武特冶航研科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the high-temperature alloy GH4099 steel ingot is relatively thick, it is easy to crack due to uneven heating and deformation of the steel ingot during the forging process. The forged steel ingot is as follows: figure 1 As shown; at the same time, because Si, Al, S, P, B, Al, Ti and other elements in superalloys are easy to segregate between dendrites to form low-melting sulfides, oxides and silicates, reducing hot-working plasticity, Moreover, due to its complex alloying ratio and high alloying, superalloy GH4099 is prone to forging cracks and uneven grain size during the forging process, resulting in a low yield, generally 51%.

Method used

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  • A kind of forging method of superalloy gh4099
  • A kind of forging method of superalloy gh4099

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A batch of GH4099 steel ingots was homogenized for 48 hours at a temperature of 1150 °C, and the forging furnace was heated at the same time. When the temperature in the forging furnace was 480 °C, the steel ingots were placed in the forging furnace for forging heating, and the burning natural gas was guaranteed to be Neutral, then slowly heat up to 900°C for 5h, and keep for 2h; slowly heat again for 3h to 1150°C, and keep for 1.5h; then forge the heated ingot, with a deformation amount of 10% per fire, and then put it into forging After the furnace is kept for a period of time, forging is performed again until the forging of all the ingots in the batch is completed, and the ingots are placed in the preheated hot furnace to be air-cooled to room temperature.

[0036] The yield of this batch of ingots is 60%.

Embodiment 2

[0038] A batch of GH4099 steel ingots was homogenized for 48 hours at a temperature of 1150 °C, and the forging furnace was heated at the same time. When the temperature in the forging furnace was 450 °C, the steel ingots were placed in the forging furnace for forging heating, and the burning natural gas was guaranteed to be Neutral, then slowly heated for 4.6h to 910°C, and kept for 1.5h; then slowly heated again for 2.5h to 1140, and kept for 1.5h; then the heated ingot was forged, the deformation amount per fire was 12%, and then After being placed in the forging furnace for a period of time, forging is carried out again until the forging of all the ingots in the batch is completed, and the ingots are placed in the preheated hot furnace to be air-cooled to room temperature.

[0039] The yield of this batch of ingots is 60.5%. Forged steel ingots such as figure 2 shown.

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Abstract

The invention discloses a forging method of superalloy GH4099, which specifically includes the following steps: before forging, homogenizing the GH4099 steel ingot at a temperature of 1150° C. for 48 hours; preheating the forging furnace, and placing the homogenized steel ingot in the forging process In the furnace, the forging heating is carried out in a neutral atmosphere. At this time, the temperature in the forging furnace is less than or equal to 500 °C, then the temperature is slowly raised to 890~910 °C, and the temperature is kept for more than 1 hour. ; Forge the steel ingot after forging heating, the forging temperature is greater than or equal to 1050℃, and the final forging temperature is greater than or equal to 980℃; then place the steel ingot in the forging furnace at 1140~1160℃ and keep it at 1140~1160℃ for more than 1h, keep the temperature at 1140~1160℃. After the end, repeat the above steps to complete the forging process, each forging deformation is greater than or equal to 10%; finally, the steel ingot obtained after forging is placed in a preheated hot furnace, and the steel ingot is slowly air-cooled to room temperature. During the forging and heating process of the present invention, the steel ingot is heated evenly, the cracking of the forged steel ingot can be effectively avoided, and the finished product rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy forging, and particularly relates to a high-temperature alloy GH4099 forging method. Background technique [0002] GH4099 is a highly alloyed nickel-based aged sheet alloy, used cobalt Elements such as tungsten and molybdenum are used for solid solution strengthening, and elements such as aluminum and titanium are added for aging strengthening, so that the alloy has high thermal forcing, and can be used for a long time below 900 °C, and the maximum working temperature can reach 1000 °C. The alloy is stable in structure and has satisfactory cold and hot forming and welding process properties, and is suitable for manufacturing aerospace fairings and high temperature plate bearing welded structural parts such as aero-engine combustion chambers and afterburners. [0003] The existing forging process parameters of superalloy GH4099 are: forging furnace temperature≤700℃, heating temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/00B21J1/06
CPCB21J5/00B21J1/00B21J1/06
Inventor 曹征宽李荣之王渝陈知伟吴建军
Owner 宝武特冶航研科技有限公司
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