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Wrought superalloy production process

A deformed superalloy, production process technology, applied in the field of metal materials, can solve the problems of complex powder metallurgy process, long process flow, high production cost of deformed superalloy turbine disk, etc., to improve high temperature oxidation resistance, increase expansion path, excellent The effect of machinability

Inactive Publication Date: 2019-02-22
宁国市华成金研科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 compared to the casting + forging deformation process route Alloy turbine discs are expensive to produce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The production process of deformed superalloy includes the following steps:

[0044] Step S1, pretreatment of alloy raw materials: according to the following parts by weight: 2 parts of molybdenum, 40 parts of nickel, 5 parts of aluminum, 0.5 parts of yttrium oxide, 0.2 parts of lanthanum oxide, and 0.1 part of chopped carbon fiber. Premixing;

[0045] Step S2: Prepare the alloy according to the above element ratio, and then smelt it in a vacuum induction furnace. During the smelting process, control the melting temperature: 1530°C; control the molten steel refining temperature: 1500°C; tap the steel at the end of smelting, and pour the solution into an alloy electrode;

[0046] Step S3: Perform electroslag remelting on the alloy electrode obtained in step S2, and remelt it into an electroslag ingot; electroslag remelting uses pre-melted slag, and the mass ratio of the slag system is Al 2 o 3 : TiO 2 : CaO: MgO = 20: 10: 2.8: 5;

[0047] Step S4: Carrying out vacuum...

Embodiment 2

[0053] The production process of deformed superalloy includes the following steps:

[0054] Step S1, pretreatment of alloy raw materials: according to the following parts by weight: 2.5 parts of molybdenum, 45 parts of nickel, 7.5 parts of aluminum, 0.8 parts of yttrium oxide, 0.25 parts of lanthanum oxide, and 0.15 parts of chopped carbon fiber. Premixing;

[0055] Step S2: Prepare the alloy according to the above element ratio, and then smelt it in a vacuum induction furnace. During the smelting process, control the melting temperature: 1550°C; control the molten steel refining temperature: 1540°C; tap the steel at the end of smelting, and pour the solution into an alloy electrode;

[0056] Step S3: Perform electroslag remelting on the alloy electrode obtained in step S2, and remelt it into an electroslag ingot; electroslag remelting uses pre-melted slag, and the mass ratio of the slag system is Al 2 o 3 : TiO 2 : CaO: MgO = 20: 10: 2.8: 5;

[0057] Step S4: Carry out va...

Embodiment 3

[0063] The production process of deformed superalloy includes the following steps:

[0064] Step S1, pretreatment of alloy raw materials: according to the following parts by weight: 3 parts of molybdenum, 50 parts of nickel, 8 parts of aluminum, 1 part of yttrium oxide, 0.3 parts of lanthanum oxide, and 0.2 parts of chopped carbon fiber. Premixing;

[0065] Step S2: Prepare the alloy according to the above element ratio, and then smelt it in a vacuum induction furnace. During the smelting process, control the melting temperature: 1580°C; control the molten steel refining temperature: 1570°C; tap the steel at the end of smelting, and pour the solution into an alloy electrode;

[0066] Step S3: Perform electroslag remelting on the alloy electrode obtained in step S2, and remelt it into an electroslag ingot; electroslag remelting uses pre-melted slag, and the mass ratio of the slag system is Al 2 o 3 : TiO 2 : CaO: MgO = 20: 10: 2.8: 5;

[0067] Step S4: Carry out vacuum cons...

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Abstract

The invention discloses a wrought superalloy production process. The process comprises the following steps: S1, pretreatment of alloy raw materials; S2: melting in a vacuum induction furnace; S3: electroslag remelting; S4: vacuum self-consumption remelting; S5: high temperature diffusion homogenization annealing; S6: extruding of a desired bar on an extruder; S7: sample cutting by wire cutting, and heat treating of the sample; and S8: oxidation treatment. The rought superalloy production process ensures good comprehensive performance of the alloy through the specific reasonable ratio of each alloying element. Compared with existing alloy, the processed wrought superalloy has the advantages of excellent workability, high high-temperature mechanical properties and tissue stability, and excellent oxidation resistance. The process has low total production cost, can meet the low-cost manufacturing requirements of aero-engine turbine disks, has good economic and social benefits, and is suitable for use and popularization.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a production process of a deformed superalloy. 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 in a high-temperature environment 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 650°C. With the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/08C22C49/14C22C47/08C22F1/10C22C101/10
CPCC22C47/08C22C49/08C22C49/14C22F1/10
Inventor 程国华
Owner 宁国市华成金研科技有限公司
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