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Preparing method for superfine high-grade spherical GH4133 alloy powder

An alloy powder and grade technology is applied in the field of preparation of grade spherical GH4133 alloy powder, which can solve the problems of poor powder shape, insufficient performance, and excessive grain size.

Inactive Publication Date: 2017-05-17
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing ultra-fine high-grade spherical GH4133 alloy powder, so as to solve the problem of excessive grain size in the process of preparing GH4133 alloy by powder metallurgy, which leads to insufficient performance and powder Poor shape leads to poor deformability and other problems, as well as problems such as poor morphology and excessive inclusions of alloy powder produced by the currently commonly used powder making method; ensure that the formed GH4133 alloy has uniform composition, fine structure, and excellent performance. Application Requirements for Key Components of Aeroengines

Method used

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  • Preparing method for superfine high-grade spherical GH4133 alloy powder

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Experimental program
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Effect test

Embodiment 1

[0022] A preparation method of ultra-fine high-grade spherical GH4133 alloy powder, comprising the following steps:

[0023] 1) According to the ingredients of GH4133, Cr: 19.9%, Al: 1.12%, Ti: 2.56%, C: 0.044%, Nb: 1.54%, B: 0.012%, Ce: 0.01%, Ni is expected to be the matrix, and vacuum is used Induction smelting and electroslag remelting processes are used to melt GH4133 alloy rods to make electrode rods;

[0024] 2) Finish turning the smelted GH4133 alloy rod into an electrode rod. The diameter of the processed electrode rod is 55mm, the length is 450mm, the roundness deviation is 0.03mm, the straightness deviation is 0.045mm / 450mm, and the roughness is 1.22μm;

[0025] 3) Load the electrode rod into the reaction chamber, and evacuate the reaction chamber to 2×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.13MPa, the oxygen content is 0.002%, and the oxygen content is calculated by mass percentage;

[0026] 4) The power of the pl...

Embodiment 2

[0030] A preparation method of ultra-fine high-grade spherical GH4133 alloy powder, comprising the following steps:

[0031] 1) According to the ingredients of GH4133, Cr: 20.5%, Al: 0.94%, Ti: 2.78%, C: 0.022%, Nb: 1.23, Ni is the matrix, and the GH4133 alloy rod is smelted by vacuum induction melting and electroslag remelting process , made into an electrode rod;

[0032] 2) Finish turning the smelted GH4133 alloy rod into an electrode rod. The diameter of the processed electrode rod is 75mm, the length is 650mm, the roundness deviation is 0.025mm, the straightness deviation is 0.025mm / 650mm, and the roughness is 0.58μm;

[0033] 3) Load the electrode rod into the reaction chamber, and evacuate the reaction chamber to 7×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.14MPa, the oxygen content is 0.003%, and the oxygen content is calculated by mass percentage;

[0034] 4) The power of the plasma gun of PREP powder making equipment i...

Embodiment 3

[0039] A preparation method of ultra-fine high-grade spherical GH4133 alloy powder, comprising the following steps:

[0040] 1) According to the ingredients of GH4133, according to mass percentage, Cr: 21.0%, Al: 1.10%, Ti: 2.75%, C: 0.043%, Nb: 1.52%, B: 0.012%, Ce: 0.012%, expected Ni As the substrate, GH4133 alloy rods are melted by vacuum induction melting and electroslag remelting to make electrode rods;

[0041] 2) Finish turning the smelted GH4133 alloy rod into an electrode rod. The diameter of the processed electrode rod is 65mm, the length is 800mm, the roundness deviation is 0.06mm, the straightness deviation is 0.04mm / 800mm, and the roughness is 1.23μm;

[0042] 3) Load the electrode rod into the reaction chamber, and evacuate the reaction chamber to 3×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.14MPa, the oxygen content is 0.003%, and the oxygen content is calculated by mass percentage;

[0043] 4) The power of the p...

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Abstract

The invention discloses a preparing method for superfine high-grade spherical GH4133 alloy powder. The method includes the steps that firstly, burdening is conducted according to components of a GH4133 alloy, and a GH4133 alloy bar is formed through smelting; secondly, the GH4133 alloy bar is subjected to finish machining to form an electrode bar; thirdly, the electrode bar is loaded into a reaction chamber, vacuum pumping is conducted on the reaction chamber, and the reaction chamber is inflated with inert gas according to a certain proportion; and fourthly, a plasma torque comprises a tungsten cathode and a copper anode, the electrode bar does not serve as the electrode, the end portion of the electrode bar is heated so that the end portion can be evenly melted; atomized liquid drops are thrown out from the end portion of the electrode bar so that the liquid drops can be rapidly cooled in the inert gas environment to form spherical particles and fall into a collector; and fifthly, the prepared GH4133 alloy powder is screened and subjected to electrostatic impurity removing in the inert gas protection environment. The GH4133 alloy powder prepared through the method has the beneficial effects of being superfine, high in purity capable of achieving a high-grade spherical shape and free of hollow powder and satellite powder.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy powder metallurgy preparation, and in particular relates to a preparation method of ultrafine high-grade spherical GH4133 alloy powder. Background technique [0002] GH4133 is a nickel-based deformed superalloy, its composition has distinctive characteristics: high Ti, Al, Nb content, γ′ phase content of more than 60%, ensuring the strength of the alloy, and the alloy has a very low Ti / Al ratio, while adding strong carbide forming elements Hf, Nb, etc., reduces the formation tendency of the original grain boundary, and a large amount of refractory elements such as W and Mo are added. The reasonable chemical composition performance of the alloy ensures the excellent performance of the alloy. GH4133 has good comprehensive performance at 700°C, and is widely used in the manufacture of important components such as aero-engine turbine disks, bearing rings and blades. [0003] In recen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10C22C19/05
CPCB22F9/10C22C19/05
Inventor 闫飞宋嘉明王晨相敏陈以强刘洋韩志宇王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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