Method for rapidly dissolving Laves phase in deformed high-temperature alloy ingot by pulse current

A technology of deforming superalloys and pulse currents, applied in the field of deforming superalloys, can solve the problems of complex process, high processing temperature and long processing time of homogenization process

Active Publication Date: 2020-10-23
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this method can dissolve the Laves phase better, the traditional homogenization process has high processing temperature, long processing time and complicated process

Method used

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  • Method for rapidly dissolving Laves phase in deformed high-temperature alloy ingot by pulse current
  • Method for rapidly dissolving Laves phase in deformed high-temperature alloy ingot by pulse current
  • Method for rapidly dissolving Laves phase in deformed high-temperature alloy ingot by pulse current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for rapidly dissolving the Laves phase in a deformed superalloy ingot by pulse current, comprising the following steps: performing pulse current external field treatment on the deformed superalloy ingot, and the specific operation steps are as follows:

[0038] S1. The surface of the GH4169D new nickel-based superalloy ingot is polished with 180 mesh, 600 mesh, 1000 mesh, 1500 mesh and 2000 mesh sandpaper in sequence until there are no visible defects to the naked eye, and then the GH4169D alloy ingot is passed through a pure copper wire and a pure copper fixture Connect to both ends of the pulse power supply;

[0039] S2. Set the pulse frequency to 30000Hz, set the current and voltage parameters so that the current density is 16.35A / mm 2 , continue pulse treatment at room temperature for 30min, then disconnect the power supply and air cool to room temperature. During the whole process, the surface temperature of the superalloy was 900 °C measured by the K-typ...

Embodiment 2

[0041] A method for quickly dissolving the Laves phase in a deformed superalloy ingot by a pulse current, using the GH4169D new nickel-based superalloy ingot with the same microstructure and mechanical properties as in Example 1, and proceeding according to the method in Example 1, the difference is that

[0042] The pulse current external field treatment is performed on the deformed superalloy ingot, and the specific operation steps are as follows:

[0043] S1. Grind the surface of the GH4169D new nickel-based superalloy ingot with 180 mesh, 600 mesh, 1000 mesh, 1500 mesh and 2000 mesh sandpaper in sequence until there are no visible defects to the naked eye, and then pass the GH4169D alloy rectangular ingot through a pure copper wire, pure copper The fixture is connected to both ends of the pulse power supply;

[0044] S2. Set the pulse frequency to 30000Hz, set the current and voltage parameters so that the current density is 18.5A / mm 2 , continue pulse treatment at room ...

Embodiment 3

[0046] A method for rapidly dissolving the Laves phase in a deformed superalloy ingot by a pulse current, selects the GH4169D new nickel-based superalloy ingot with the same microstructure and mechanical properties as in Example 2, and proceeds according to the method in Example 2, with the difference In step S2, the pulse current processing parameters are as follows:

[0047] Set the current and voltage parameters so that the current density is 1A / mm 2 , the pulse processing time is 10h.

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PUM

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Abstract

The invention discloses a method for rapidly dissolving Laves phase in a deformed high-temperature alloy ingot by pulse current. The method comprises the following steps of carrying out pulse currentexternal field treatment on the deformed high-temperature alloy ingot under the following treatment parameters that the pulse frequency is 25000-35000 Hz, the current density is 1A / mm<2> - 100A / mm<2>.The method has the advantages that the Laves phase in the material can be completely dissolved at a relatively low temperature within an extremely short time, the time is short, the temperature is low, the operation is simple, the energy consumption can be greatly reduced, and the requirements of current industrial green development planning are met; and in addition, the plasticity of the alloy can be improved, the alloy is used for deformed high-temperature alloy treatment, subsequent cogging and forging processes are facilitated, and a new method is provided for preparation of a high-temperature alloy turbine disc.

Description

technical field [0001] The invention relates to the technical field of deformed superalloys, more specifically, it relates to a method for rapidly dissolving Laves phase in a deformed superalloy ingot by pulse current. Background technique [0002] Due to its excellent high temperature resistance, creep resistance and oxidation resistance, wrought superalloys have become the key materials for components such as aerospace, ship engines and gas turbine disks. The integrated blisk is a new type of structure for modern aero-engines, and it is also the choice trend of high thrust-to-weight ratio engines. The integration of the blisks increases the diameter of the forging. However, to manufacture large-sized parts, large-sized ingots must be produced to obtain sufficient deformation ratios. Under the existing conditions, smelting large ingots will further aggravate the degree of element segregation, which will promote the formation of Laves with a higher number density between the...

Claims

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Application Information

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IPC IPC(8): C22F3/00C22C19/05
CPCC22F3/00C22C19/056C22C19/058
Inventor 王民庆张新房白荣晟杜金辉
Owner BEIJING CISRI GAONA TECH
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