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Electroslag remelting process of nickel-based superalloy

A nickel-based superalloy, electroslag remelting technology, applied in the field of nickel-based superalloys, can solve the problems of composition segregation, large number of inclusions, etc.

Inactive Publication Date: 2020-01-24
JINGYE STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, the current existing technologies of some nickel-based superalloys also have certain deficiencies, such as a large number of inclusions, composition segregation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An electroslag remelting process for a nickel-based superalloy, the preparation steps of which are as follows:

[0041] (1) Determine the target product: Nickel-based superalloy calculated by mass percentage: Cr 17.5, Co 17.5, Mo7.2, W 5, Ta 3.2, Al 3.8, Ti 2.5, Fe 3, V: 0.55, Mn 0.15, Si 0.1, C 0.01, Zr 0.01, B0.003, Sc 0.05, Hf 0.20, the balance is composed of Ni and unavoidable impurities;

[0042] (2) Vacuum induction furnace smelting: mix ingredients according to the chemical composition ratio of the target product combined with the amount of burning loss, and add them to the vacuum induction melting furnace for smelting; select Ni-Co master alloy, Ni-Cr master alloy, Ni-Mo master alloy, Fe-Mo master alloy, W, Ta, V and / or Nb, Zr, Hf choose a suitable master alloy, Ti, Al, Mn, Si, C, B, rare earth choose a low melting point master alloy or simple substance; put it into a crucible, When the raw material is about to be completely melted, add a covering agent to the ...

Embodiment 2

[0049] An electroslag remelting process for a nickel-based superalloy, the preparation steps of which are as follows:

[0050] (1) Determine the target product: Nickel-based superalloy calculated as mass percentage: Cr 18, Co 16.8, Mo 7.5, W4.5, Ta3.5, Al 3.5, Ti 2.2, Fe 2, V: 0.65, Mn 0.25, Si 0.15, C 0.03, Zr 0.02, B 0.0015, Sc 0.005, Hf 0.10, the balance is composed of Ni and unavoidable impurities;

[0051] (2) Vacuum induction furnace smelting: mix ingredients according to the chemical composition ratio of the target product combined with the amount of burning loss, and add them to the vacuum induction melting furnace for smelting; select Ni-Co master alloy, Ni-Cr master alloy, Ni-Mo master alloy, Fe-Mo master alloy, W, Ta, V and / or Nb, Zr, Hf choose a suitable master alloy, Ti, Al, Mn, Si, C, B, rare earth choose a low melting point master alloy or simple substance; put it into a crucible, When the raw material is about to be completely melted, add a covering agent to t...

Embodiment 3

[0058] An electroslag remelting process for a nickel-based superalloy, the preparation steps of which are as follows:

[0059] (1) Determine the target product: Nickel-based superalloy calculated by mass percentage: Cr 17.5, Co 17, Mo 7.4, W4.75, Ta 3.3, Al 3.7, Ti 2.4, Fe 2.5, V: 0.6, Mn 0.2, Si 0.12, C 0.02, Zr 0.015, B0.002, Sc 0.03, Hf 0.15, the balance is composed of Ni and unavoidable impurities;

[0060](2) Vacuum induction furnace smelting: mix ingredients according to the chemical composition ratio of the target product combined with the amount of burning loss, and add them to the vacuum induction melting furnace for smelting; select Ni-Co master alloy, Ni-Cr master alloy, Ni-Mo master alloy, Fe-Mo master alloy, W, Ta, V and / or Nb, Zr, Hf choose a suitable master alloy, Ti, Al, Mn, Si, C, B, rare earth choose a low melting point master alloy or simple substance; put it into a crucible, When the raw material is about to be completely melted, add a covering agent to th...

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Abstract

The invention discloses an electroslag remelting process of a nickel-based superalloy. The electroslag remelting process is characterized in that the superalloy comprises the components in percentageby mass: 15-20% of Cr, 15-20% of Co, 5-10% of Mo, 2-6% of W, 1-4% of Ta, 1-4% of Al, 2.2-2.5% of Ti, 1-5% of at least two of Fe, V, Nb and rare earth, and the balance Ni and inevitable impurities, wherein Fe, V, Nb and rare earth are selectively added. The electroslag remelting process adopts a specific slag system matched with specific voltage, current and cooling process.

Description

technical field [0001] The invention relates to the field of nickel-based high-temperature alloys, in particular to an electroslag remelting process suitable for manufacturing high-temperature structural parts used in the fields of aviation, aerospace, energy, thermal spraying, coating and the like. Background technique [0002] The different working environments of superalloys put forward higher requirements on material properties. Such as high temperature, some parts have to work for a long time under the condition of more than 800 ℃. Such as high stress, some high-temperature components, due to vibration, air flow erosion, especially the centrifugal effect caused by rotation, will bear greater stress, such as the stress of turbine blades can reach 300-409MPa. Chemical effects such as oxidation and corrosion. [0003] In addition, the current existing technologies of some nickel-based superalloys have certain deficiencies, such as a large number of inclusions and composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18C22C1/03C22C30/00C22C1/06C22F1/00C21D9/00
CPCC21D9/0075C22B9/18C22C1/023C22C1/03C22C1/06C22C19/056C22C30/00C22F1/002C22F1/10Y02P10/25
Inventor 张觉灵杨海西刘博张华
Owner JINGYE STEEL CO LTD
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