High-intensity nickel based wrought superalloy and preparation method thereof

A deformed superalloy, high-strength technology, applied in the field of nickel-based superalloy, can solve the problems of high production cost, complex powder metallurgy process, long process flow, etc., to reduce smelting cost, meet low-cost manufacturing requirements, and short process flow Effect

Active Publication Date: 2018-08-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although powder metallurgy superalloys (such as FGH4097 alloy) are a material selection consideration for the manufacture of high-thrust ratio engine turbine disks in the future, due to the complex powder metallurgy process and long process flow, the high-temperature deformation process compared to the casting + forging deformation process route Alloy turbine discs are expensive to produce (Document 1: Devau

Method used

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  • High-intensity nickel based wrought superalloy and preparation method thereof
  • High-intensity nickel based wrought superalloy and preparation method thereof
  • High-intensity nickel based wrought superalloy and preparation method thereof

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preparation example Construction

[0027] The preparation method of the high-strength nickel-based deformed superalloy comprises the following steps:

[0028] Step A: Prepare the alloy according to the ratio of the above elements, and then melt it in a vacuum induction furnace. During the melting process, control the melting temperature: 1510°C-1570°C; The solution is poured into an alloy electrode;

[0029] Step B: performing electroslag remelting on the alloy electrode obtained in step A, and remelting it into an electroslag ingot;

[0030] Step C: Carrying out vacuum consumable remelting of the electroslag ingot obtained in step B to obtain a consumable ingot;

[0031] Step D: performing high-temperature diffusion homogenization annealing on the consumable ingot obtained in step C in the range of 1170°C to 1190°C to obtain a homogenization annealed ingot;

[0032] Step E: heating the homogenized annealed ingot obtained in step D to 1130°C-1160°C, keeping it warm for 2h-4h, and forging it into the required ...

Embodiment 1

[0039] A method for preparing the high-strength nickel-based deformed superalloy of the present invention, comprising the steps of:

[0040] Step A: According to Cr: 22%; Co: 13%; Mo: 3.8%; W: 5.0%; Al: 2.0%; Ti: 3.5%; Nb: 1.0%; Fe: 1.0%; C: 0.06%; B : 0.02%; Zr: 0.02%; Ce: 0.03%; Mg:0.01%; Temperature: 1553°C; control molten steel refining temperature: 1550°C; tap the steel at the end of smelting, and pour the solution into alloy electrodes;

[0041] Step B: performing electroslag remelting on the alloy electrode obtained in step A, and remelting it into an electroslag ingot;

[0042] Step C: Carrying out vacuum consumable remelting of the electroslag ingot obtained in step B to obtain a consumable ingot;

[0043] Step D: performing high-temperature diffusion homogenization annealing on the consumable ingot obtained in step C at 1170° C. to obtain a homogenization annealed ingot;

[0044] Step E: heating the homogenized annealed ingot obtained in step D to 1130°C, keeping ...

Embodiment 2

[0048] The method for preparing the high-strength nickel-based deformed superalloy of the present invention comprises the following steps:

[0049] Step A: According to Cr: 16%; Co: 15%; Mo: 5.5%; W: 4.5%; Al: 1.5%; Ti: 4.0%; Nb: 0.8%; Fe: 0.8%; C: 0.03%; B : 0.015%; Zr: 0.04%; Ce: 0.002%; Mg: 0.002%; Temperature: 1552°C; Control molten steel refining temperature: 1560°C; Tap the steel at the end of smelting, and pour the solution into alloy electrodes;

[0050] Step B: performing electroslag remelting on the alloy electrode obtained in step A, and remelting it into an electroslag ingot;

[0051] Step C: Carrying out vacuum consumable remelting of the electroslag ingot obtained in step B to obtain a consumable ingot;

[0052] Step D: performing high-temperature diffusion homogenization annealing on the consumable ingot obtained in step C at 1180° C. to obtain a homogenization annealed ingot;

[0053] Step E: heating the homogenized annealed ingot obtained in step D to 1140°...

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Abstract

The invention belongs to the technical field of nickel based wrought superalloy, and particularly relates to a high-intensity nickel based wrought superalloy and a preparation method thereof. The high-intensity nickel based wrought superalloy comprises the following main elements in percentage by mass: 10.0-25.0% of Cr, 10.0-20.0% of Co, 0.1-6.0% of Mo, 0.1-6.0% of W, 0.1-6.0% of Al, 0.1-6.0% of Ti, 0.05-1.5% of Nb, 0.1-2.0% of Fe, 0.001-0.10% of C, 0.001-0.05% of B, 0.01-0.1% of Zr, 0.001-0.10% of Ce, 0.001-0.10% of Mg, 0.01%-0.5% of Hf, and the balance Ni and inevitable impurity elements. The preparation method comprises the steps of preparing a high-purity cast ingot by vacuum induction smelting, electroslag remelting and vacuum self-consumption remelting; performing high-temperature diffusion to uniformly anneal the cast ingot under the temperature ranging from 1170-1190 DEG C; heating the annealed cast ion to reach the temperature of 1130-1160 DEG C, maintaining the temperature for 2-4h; then forging the cast ingot into a bar as required through a quick forging press, and thermally processing a bar sample to obtain the alloy material meeting the design demand.

Description

technical field [0001] The invention belongs to the technical field of nickel-based high-temperature alloys, and relates to a high-strength nickel-based deformed high-temperature alloy and a preparation method thereof. Background technique [0002] Compared with stainless steel and heat-resistant steel, high-temperature alloys are a type of material that has a high degree of alloying by adding various elements and can work for a long time above about 600 °C. According to the matrix, superalloys mainly include nickel-based superalloys, iron-based superalloys and cobalt-based superalloys. According to the forming process, they are generally divided into three categories, including deformed superalloys, casting superalloys and powder metallurgy superalloys. Nickel-based wrought superalloys have become indispensable key materials for aeroengine turbine disks, compressor disks and other rotating parts. GH4169 is a nickel-based deformed superalloy with a service temperature of 65...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C30/00C22C1/02C22B9/18C22B9/20C22F1/10
CPCC22B9/18C22B9/20C22C1/023C22C19/055C22C19/056C22C30/00C22F1/10Y02P10/25
Inventor 贾崇林张丰麟张勇
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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