High-temperature oxidation resistant wearproof Co-based alloy wire and preparation method thereof

A high-temperature oxidation-resistant, cobalt-based alloy technology, applied to high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire and its preparation, high-temperature corrosion resistance, oxidation resistance and high-strength brush wire materials, manufacturing high-temperature wear-resistant It can solve the problems that the content of trace harmful elements cannot be effectively controlled, alloy materials are prone to corrosion and wear, and the mechanism of action of alloy elements is not clear, so as to achieve good deoxidation and degassing effects, improve alloy melting process, and improve oxidation and corrosion performance.

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the unclear mechanism of action of alloying elements, the quality of products produced by the original single processing and preparation process is unstable, and the content of trace harmful elements cannot be effectively controlled. Excessive inclusions, coarse grains, and insufficient aging hardness lead to product qualification rate, poor material quality, and reduced reliability, which lead to corrosion and wear of alloy materials during use, which seriously affects the service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire, the composition and mass percentage of the alloy wire are: Cr12%, Ni12%, W10%, Mo2.8%, Al1.2%, Ti2.8%, Ta1 .2%, Nb0.2%, C0.08%, B0.01%, Zr0.04%, Re0.05%, Ce0.02%, Co is the balance, and the size is Φ0.2mm.

[0034] The steps of the method for preparing the above-mentioned high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire are as follows:

[0035] 1) Weigh 28.8kg of Co powder, 6kg of Cr powder, 6kg of Ni powder, 5kg of W powder, 1.4kg of Mo powder, 0.6kg of Al powder, 1.4kg of Ti powder, and 0.6kg of Ta powder into a 50kg vacuum induction furnace for smelting, The melting temperature is 1850-1900°C, refining for 35 minutes; then filling with 10kPa argon, adding trace amounts of 0.1kgNb, 0.04kgC, 0.005kgB, 0.02kgZr, 0.01kgCe, stirring and melting, at 1700-1800°C, refining for 20min for the second time, removing Harmful impurities, reducing gas content and non-m...

Embodiment 2

[0043] A high-temperature oxidation-resistant wear-resistant cobalt-based alloy wire, the composition and mass percentage of the alloy wire are: Cr12%, Ni 15%, W 14%, Mo 4.2%, Al1.6%, Ti3.4%, Ta1.8%, Nb0.5%, C0.08%, B0.01%, Zr0.04%, Re0.05%, Ce0.02%, Co is the balance, and the size is Φ0.15mm.

[0044] The steps of the method for preparing the above-mentioned high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire are as follows:

[0045] 1) Weigh 22.15kg of Co powder, 7.5kg of Cr powder, 7.5kg of Ni powder, 7kg of W powder, 2.1kg of Mo powder, 0.8kg of Al powder, 1.7kg of Ti powder, and 0.9kg of Ta powder into a 50kg vacuum induction furnace. Melting, melting temperature is 1850-1900°C, refining for 35 minutes; then filling 10kPa argon, adding trace amounts of 0.25kgNb, 0.04kgC, 0.005kgB, 0.02kgZr, 0.01kgCe, stirring and melting, at 1700-1850°C, second refining for 20min , remove harmful impurities, reduce gas content and non-metallic inclusions, and ...

Embodiment 3

[0053] A high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire, the composition and mass percentage of the alloy wire are: Cr17%, Ni 14%, W 12%, Mo3.4%, Al1.4%, Ti3.0% , Ta1.6%, Nb0.4%, C0.08%, B0.01%, Zr0.04%, Re0.05%, Ce0.02%, Co is the balance, and the size is Φ0.1mm.

[0054] The steps of the method for preparing the above-mentioned high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire are as follows:

[0055] 1) Weigh 23.5kg of Co powder, 8.5kg of Cr powder, 7kg of Ni powder, 6kg of W powder, 1.7kg of Mo powder, 0.7kg of Al powder, 1.5kg of Ti powder, and 0.8kg of Ta powder into a 50kg vacuum induction furnace for melting , the melting temperature is 1850-1900°C, refining for 30 minutes; then filling with 10kPa argon, adding trace amounts of 0.2kgNb, 0.04kgC, 0.005kgB, 0.02kgZr, 0.01kgCe, stirring and melting, at 1750-1850°C, refining for 20min for the second time, Remove harmful impurities, reduce gas content and non-m...

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Abstract

The invention discloses a high-temperature oxidation resistant wearproof Co-based alloy wire and a preparation method thereof. The high-temperature oxidation resistant wearproof Co-based alloy wire comprises the following ingredients: 13-17% of Cr, 11-15% of Ni, 10-14% of W, 2.4-4.3% of Mo, 1.2-1.6% of Al, 2.8-3.6% of Ti, 0.1-0.5% of Nb, 1.2-1.8% of Ta, 0.03-0.06% of Re, 0.01-0.05% of Ce, 0.02-0.1% of C, 0.005-0.015% of B, 0.02-0.07% of Zr and the balance of Co. The alloy preparation process route is vacuum melting-remelting-forging-hot rolling-drawing-solid solution treatment-aging treatment. Raw materials are compounded according to percentage by mass and then melted and re-melted; after that, forging and rolling are performed to obtain an alloy wire rod; multi-drawing is conducted to prepare an alloy wire of phi 0.06-0.4 mm; and finally, solid solution treatment and aging treatment are performed. Through reasonable ingredient control and adding of alloy elements, the alloy wire has high yield and excellent high-temperature wear resistance, high-temperature corrosion resistance, oxidation resistance and high strength. As a sealing brush wire material, the high-temperature oxidation resistant wearproof Co-based alloy wire has the advantages that the sealing effect can be effectively improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a high-temperature oxidation-resistant and wear-resistant cobalt-based alloy wire and a preparation method thereof, belonging to the technical field of material processing. It is specifically used to manufacture brush filament materials with high temperature wear resistance, high temperature corrosion resistance, oxidation resistance and high strength. 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 ~ 0.3 mm. It is the best alternative structure for the air system grate seal. The most important material part of the type sealing device requires the brush filament to have good wear resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/07C22C30/00C22F1/10
CPCC22C19/07C22C30/00C22F1/10
Inventor 储成林张斌郭超
Owner SOUTHEAST UNIV
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