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High-performance nickel-based superalloy brush wire material for brush seals

A nickel-based high-temperature alloy and brush-type sealing technology, applied in the sealing field, can solve the problems of deteriorated forming performance, poor high-temperature corrosion resistance, low high-temperature strength, etc., and achieve the effect of fine grains of brush filaments and fine dispersed phase

Active Publication Date: 2019-02-26
江苏鑫信润科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GH4145 is one of the high-temperature alloys used for brush seals. The main problems at present are low high-temperature strength and poor high-temperature corrosion resistance. Therefore, how to improve the high-temperature strength of high-temperature alloys without deteriorating its formability and improve high-temperature corrosion resistance is the key Urgent problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]A high-performance nickel-based high-temperature alloy brush wire material for brush seals. The composition and mass percentage of the brush wire alloy are: Cr 15%, Co 6%, Al 1.2%, Ti 2.2%, Nb 0.9%, C 0.07 %, B 0.005%, Zr 0.03%, Y 0.03%, Ce 0.02%, Mg 0.006%, Ni is the balance, and the size is Φ0.2mm.

[0026] The steps of the preparation method of the above-mentioned high-performance nickel-based superalloy brush wire material for brush seal are as follows:

[0027] 1) Weigh Ni ingot, Cr ingot, Co ingot, Ni80Al20 (the mass fraction of Ni is 80%, the mass fraction of Al is 20%), Ni50Ti50 (the mass fraction of Ni is 50%, Ti The mass fraction is 50%) and the ingot is put into a 50kg vacuum induction furnace for melting, the melting temperature is 1750~1850°C, refining for 35min; then fill with 10kPa argon, add trace amounts of Nb, C, B, Zr, Ce, Mg-Y The master alloy is stirred and melted, at 1550~1650°C, the second refining is for 20 minutes to remove harmful impurities, r...

Embodiment 2

[0035] A high-performance nickel-based high-temperature alloy brush wire material for brush seals. The composition and mass percentage of the alloy brush wire are: Cr 14%, Co 8%, Al 1.5%, Ti 2.4%, Nb 1%, C 0.07 %, B 0.01%, Zr 0.04%, Ce 0.02%, Y0.03%, Mg 0.006%, Ni is the balance, and the size is Φ0.15mm.

[0036] The steps of the preparation method of the above-mentioned high-performance nickel-based superalloy brush wire material for brush seal are as follows:

[0037] 1) Weigh Ni ingot, Cr ingot 9kg, Co ingot 9.675kg, Ni50Ti50 (among them, the mass fraction of Ni is 50%, and the mass fraction of Ti is 50%) and put them into a 50kg vacuum induction furnace for melting. The temperature is 1750~1850°C, refining for 30 minutes; then filling with 12kPa argon, adding traces of Nb, C, B, Zr, Ce, Mg-Y, stirring and melting, at 1550~1650°C, refining for 25 minutes for the second time to remove harmful impurities , reduce gas content and non-metallic inclusions, and cast alloy rods u...

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Abstract

The invention discloses a brush sealing high-performance nickel-base superalloy brush wire material. The brush wire material comprises the following components in percentage by mass: 14-17 percent of Cr, 5-9 percent of Fe, 5-8 percent of Co, 1-1.5 percent of Al, 2-2.5 percent of Ti, 0.7-1.2 percent of Nb, less than or equal to 0.08 percent of C, 0.003-0.01 percent of B, 0.01-0.05 percent of Zr, 0.005-0.008 percent of Mg, 0.01-0.03 percent of Ce, 0.01-0.06 percent of Y, and the balance of Ni and inevitable impurities. The brush wire material adopting the technical scheme has the advantages that the yield is relatively high, the welding performance is relatively high, and the high temperature wear resistance, the high temperature corrosion resistance, the oxidation resistance and the strength are relatively high; the alloy composition ratio is proper, and a corresponding preparation and processing technology and a corresponding complex heat treatment technology are selected; and by addition of an appropriate amount of alloying strengthening elements and improvement on the preparation and processing technology and the heat treatment technology, the alloy performance is greatly strengthened, the structure uniformity is improved, grains are refined, defects are reduced, inclusions are improved, and the alloy yield is increased.

Description

technical field [0001] The invention relates to a high-performance nickel-based high-temperature alloy brush wire material for brush seals, which is specifically used for manufacturing high-formability, high-welding performance, high-temperature wear resistance, high-temperature corrosion resistance, oxidation resistance and high strength. A brush wire material belongs to the technical field of sealing. Background technique [0002] The brush seal is an air sealing device used in key parts of turbomachinery such as engines, steam turbines and steam engines. It is mainly composed of brush rings and corresponding matching runways. Among them, the brush ring is mainly composed of the front plate, the back plate and the dense brush wire clamped between the two with a diameter of about 0.06~0.3mm. It is the best alternative structure for the air system grate seal. The brush wire is the brush The most important material part of the type sealing device requires the brush filament ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22F1/10
CPCC22C19/058C22F1/10
Inventor 周亮
Owner 江苏鑫信润科技股份有限公司
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