Preparation method of nickel-base deformation high-temperature alloy wheel disc forged piece used at high temperature

A deformed superalloy and high-temperature technology, which is applied in the field of preparation of nickel-based deformed superalloy disc forgings, can solve problems such as metallurgical defects, easy cracking in forging, uneven structure, etc., and achieve good mechanical properties and satisfactory service stability.

Active Publication Date: 2020-06-05
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a method for preparing a nickel-based deformed superalloy wheel disc forging used at high temperature, which solves the problem that there is currently no high-performance wheel forging material that can be used for a long time at 850°C. Optimize and improve the key process links in the smelting and forging process to solve the problems of metallurgical defects, easy cracking and uneven structure in smelting of high-alloyed nickel-based superalloys containing 55-65% γ′ phase, and can produce 100-1200mm in diameter Nickel-based wrought superalloy disc forgings with excellent 850°C tensile strength, yield strength and long-lasting life

Method used

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  • Preparation method of nickel-base deformation high-temperature alloy wheel disc forged piece used at high temperature
  • Preparation method of nickel-base deformation high-temperature alloy wheel disc forged piece used at high temperature
  • Preparation method of nickel-base deformation high-temperature alloy wheel disc forged piece used at high temperature

Examples

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Effect test

Embodiment 1

[0046] Example 1. A preparation method for a nickel-based deformed superalloy disc forging that can be used at 850°C for a long time

[0047] In this example, a nickel-based deformed superalloy disc forging (with a diameter of 200 mm) that can be used at 850°C for a long time is prepared. The alloy composition is shown in the part of Example 1 in Table 1.

[0048] The preparation process of alloy wheel disc forging, such as image 3 shown, including the following steps:

[0049] Step 1. The smelting adopts a dual process (ie, vacuum induction melting and vacuum consumable remelting). The diameter of the primary alloy ingot obtained by vacuum induction smelting is 250mm, and the diameter of the alloy ingot obtained by vacuum consumable remelting is 305mm. Vacuum induction smelting includes the following steps: weighing raw materials according to the alloy element ratio, and performing vacuum induction smelting. The vacuum induction melting process includes several steps such ...

Embodiment 2

[0054] Example 2. A preparation method for a nickel-based deformed superalloy disc forging with a diameter of 550mm that can be used at 850°C for a long time

[0055] In this example, a nickel-based deformed superalloy disc forging with a diameter of 550mm is prepared for long-term use at 850°C. The alloy composition is shown in Example 2 of Table 1.

[0056] The preparation process of alloy wheel disc forging, such as image 3 shown, including the following steps:

[0057] Step 1. The smelting adopts a double process, vacuum induction melting + vacuum consumable remelting, the diameter of the alloy ingot for vacuum induction melting is 370mm, and the diameter of the vacuum consumable remelting alloy ingot is 460mm. Vacuum induction smelting includes the following steps: weighing raw materials according to the alloy element ratio, and performing vacuum induction smelting. The vacuum induction melting process includes several steps such as evacuation, smelting period, refinin...

Embodiment 3

[0062] Example 3. A nickel-based deformed superalloy wheel disk forging with a diameter of 900mm that can be used at 850°C for a long time

[0063] In this example, a nickel-based deformed superalloy diameter disc forging that can be used at 850°C for a long time is prepared. The alloy composition is shown in Table 1, Example 3.

[0064] The preparation process of alloy wheel disc forging, such as image 3 shown, including the following steps:

[0065] Step 1. The smelting adopts a triple process, vacuum induction melting + electroslag remelting + vacuum self-consumption remelting, the diameter of the vacuum induction melting alloy ingot is 355mm, the diameter of the electroslag remelting alloy ingot is 423mm, and the vacuum self-consumption remelting alloy ingot The diameter is 508mm. Vacuum induction smelting includes the following steps: weighing raw materials according to the alloy element ratio, and performing vacuum induction smelting. The vacuum induction melting pro...

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Abstract

The invention provides a preparation method of a nickel-base deformation high-temperature alloy wheel disc forged piece used at a high temperature. The alloy comprises a high content of solution strengthening elements W, Mo and elements Al, Ti, Nb forming a gamma' phase being a strengthening phase, wherein the content of the gamma' phase reaches 55% to 65%. For solving a series of technical problems brought about by the high gamma' phase to the smelting and forging of the alloy, by optimizing the heat history of the preparation process of the wheel disc forged piece and controlling the precipitation and dissolution of the gamma' phase, a high temperature stress relief annealing and low temperature stress relief annealing process of a steel ingot and a high temperature homogenizing annealing process of bars are put forward, and the problems that the smelting of the nickel-base deformation high-temperature alloy wheel disc forged piece used at a high temperature of 850 DEG C and having the diameter of 100-1200mm easily causes metallurgical defects, and the forged piece easily cracks and has the uneven structure, are solved.

Description

[0001] The invention belongs to the field of alloy preparation, and in particular relates to a method for preparing a nickel-based deformed high-temperature alloy disc forging used at high temperature. Background technique [0002] The service temperature of high-pressure compressor discs such as aero-engines and gas turbines and hot-end rotating discs such as turbine discs has gradually increased, with a maximum of more than 850 °C. Therefore, the alloy materials required for the preparation of wheel disc forgings must have excellent strength and plasticity at room temperature to 850°C, high-temperature durable creep properties, and long-term microstructure and property stability, as well as good casting and forging process performance. At present, none of the nickel-based deformed superalloy disc materials used in domestic aero-engines can meet the long-term service requirements above 850 °C. [0003] The most effective way to increase the service temperature of nickel-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C30/00C22C1/02C22C1/06C22F1/10C22B9/18C22B9/20
CPCC22C19/056C22C19/057C22C30/00C22C1/023C22C1/06C22F1/10C22B9/18C22B9/20B22D7/005
Inventor 黄烁张北江张文云秦鹤勇段然赵光普胥国华陈石富田强
Owner BEIJING CISRI GAONA TECH
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