Production method of large-specification nickel-base high-temperature alloy forged piece

A technology of nickel-based superalloy and production method, which is applied in the direction of metal processing equipment, etc., can solve the problems of no reference value and impact performance that cannot meet the requirements, and achieve the effects of ensuring uniformity, reducing edge temperature loss, and excellent impact toughness

Active Publication Date: 2020-06-05
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the disk is prepared by this method, its impact performance cannot meet the requirements, so it is still not of reference value

Method used

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  • Production method of large-specification nickel-base high-temperature alloy forged piece
  • Production method of large-specification nickel-base high-temperature alloy forged piece
  • Production method of large-specification nickel-base high-temperature alloy forged piece

Examples

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Effect test

Embodiment 1

[0043] Embodiment 1 The method for producing large-size nickel-based superalloy forgings of the present invention includes the following steps:

[0044] The GH4169 alloy billet is prepared by the conventional fast forging process, and the grain structure of the billet reaches 5 or finer. The grain structure of the intermediate billet is shown in the photo Figure 1-2 .

[0045] The surface of the blank is ground, and then cut to length. The size of the blank is φ200×440mm, and the aspect ratio is 2.2.

[0046] The billet is heated in a heating furnace, see the heating process image 3 , The holding temperature is 1040℃.

[0047] After the billet reaches temperature, it is quickly transferred to the press. After adjusting the billet position, make sure that its upper and lower end faces are parallel; press the disc at a deformation rate of 20mm / s, and control the deformation according to the height. The deformed forging is immediately taken out and air-cooled.

[0048] The surface condit...

Embodiment 2

[0049] Example 2 A method for producing large-size nickel-based high-temperature alloy forgings of the present invention includes the following steps:

[0050] The GH4169 alloy billet is prepared by the radial forging process, and the grain structure of the billet reaches level 5 or finer.

[0051] The surface of the blank is ground, and then cut to length. The size of the blank is φ200×480mm, and the height-to-diameter ratio is 2.4.

[0052] The billet is heated in a heating furnace, see the heating process image 3 , The holding temperature is 1000℃.

[0053] After the blank reaches the temperature, it is quickly transferred to the press. After adjusting the position of the blank, make sure that its upper and lower ends are parallel; press the disc at a deformation rate of 20mm / s, and control the amount of deformation according to the height. The deformed forgings are taken out immediately and air-cooled.

[0054] The surface condition of the forged blanks is poor, and the size speci...

Embodiment 3

[0055] Example 3 A method for producing large-size nickel-based high-temperature alloy forgings of the present invention includes the following steps:

[0056] The GH4169 alloy billet is prepared by the rapid forging process, and the grain structure of the intermediate billet reaches level 5 or finer.

[0057] The surface of the blank is ground, and then cut to length. The size of the blank is φ200×440mm, and the aspect ratio is 2.2.

[0058] The billet is heated in a heating furnace, see the heating process image 3 , The holding temperature is 1000℃.

[0059] After the blank reaches the temperature, it is quickly transferred to the press. After adjusting the position of the blank, make sure that its upper and lower ends are parallel. Press the disc at a deformation rate of 30mm / s, and control the amount of deformation according to the height. The deformed forgings are taken out immediately and air-cooled.

[0060] The surface condition of the forged blanks is poor, and the size spec...

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Abstract

The invention discloses a production method of a large-specification nickel-base high-temperature alloy forged piece. By means of the steps of blank preparation, grinding feeding operation, heating and heat preservation, isothermal forging operation and machining operation, the isothermal forging technology is adopted to control the technological parameters such as the blank height-diameter ratio,the forging temperature and the deformation rate, the mold temperature is controlled within a certain range, the blank temperature drop is effectively reduced, then delta-phase excessive precipitation is avoided, and the grain organization can be effectively refined under the condition of the high deformation. The GH4169 alloy (In718 in foreign countries) forged piece which meets the requirementsof airspace engines and vessel steam turbines is produced, and has the excellent strength, the endurance property and the high toughness.

Description

Technical field [0001] The invention belongs to the forging field of nickel-based alloys, and specifically relates to a method for producing large-size nickel-based high-temperature alloy forgings. Background technique [0002] Superalloy is a key metal structural material necessary for modern aerospace engines, ship gas turbines and other fields. It can withstand greater stress and long-term use in high-temperature environments (generally 600℃~1100℃), oxidation, and gas corrosion conditions. Due to the different operating conditions, the performance requirements of different components are very different. Among them, the service environment of the rotating parts of the engine is the most demanding, and the performance requirements are also the most stringent. [0003] Taking the current high-thrust aerospace engine as an example, the material of the turbine disc is GH4169 alloy. In consideration of design and operating conditions, engine turbine disk forgings are required to have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10B21J5/00
CPCB21J5/00C22F1/10
Inventor 代朋超王资兴张灵敏陈濛潇
Owner 宝武特种冶金有限公司
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