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Method for preparing nano spherical oxide dispersion strengthening phase

A technology of nano-oxide and dispersion strengthening, which is applied in the field of powder metallurgy materials, can solve the problems that have not been reported, and achieve the effect of improving the nano-sized effect, increasing the elongation rate, and promoting the effect of uniform dispersion

Active Publication Date: 2021-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, how to prepare spherical, especially nano-spherical oxide-reinforced phases has not been reported

Method used

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  • Method for preparing nano spherical oxide dispersion strengthening phase
  • Method for preparing nano spherical oxide dispersion strengthening phase
  • Method for preparing nano spherical oxide dispersion strengthening phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: Fe-14Cr-3W-0.4Ti-1.5Y 2 o 3 (wt.%) Alloy

[0055] making process:

[0056] Step 1: According to the mass ratio of 1:4, weigh Y 2 o 3 60 g of powder and 240 g of gas-atomized Fe-14Cr-3W-0.4Ti (wt.%) iron-based pre-alloyed powder are 300 g in total, and put into a ball mill jar. Among them, the iron-based pre-alloyed powder particle size is less than or equal to 150μm, Y 2 o 3 Powder particle size is less than or equal to 10μm. According to the mass ratio of ball to material 10:1, the diameter of the grinding ball is 20mm:15mm:10mm:8mm:5mm:3mm=1:1:1:1:1:1, weigh 3000g of the grinding ball and put it into the ball milling tank.

[0057] Step 2: Seal the ball mill tank, vacuumize it, the vacuum degree is less than or equal to 0.1Pa, and fill it with high-purity argon.

[0058] Step 3: Put the ball mill jar into the vertical planetary ball mill for mechanical ball milling; set the parameters of the mechanical ball mill, the rotation speed is 300r / min, a...

Embodiment 2

[0063] Embodiment 2: Fe-14Cr-3W-0.4Ti-1.0Y 2 o 3 (wt.%) Alloy

[0064] making process:

[0065] Step 1: According to the mass ratio of 1:3, weigh Y 2 o 3 75g of powder and 225g of gas-atomized Fe-14Cr-3W-0.4Ti (wt.%) iron-based pre-alloy powder are 300g in total, and put into a ball mill jar. Among them, the iron-based pre-alloyed powder particle size is less than or equal to 150μm, Y 2 o 3 Powder particle size is less than or equal to 10μm. According to the ball-to-material ratio of 12:1, the diameter of the grinding balls is 20mm:15mm:10mm:8mm:5mm:3mm=1:1:1:1:1:1, weigh 3600g of grinding balls and put them into the ball milling tank.

[0066] Step 2: Seal the ball mill tank, vacuumize it, the vacuum degree is less than or equal to 0.1Pa, and fill it with high-purity argon.

[0067] Step 3: Put the ball mill jar into the vertical planetary ball mill for mechanical ball milling; set the parameters of the mechanical ball mill, the rotation speed is 280r / min, and the mec...

Embodiment 3

[0072] Embodiment 3: Fe-14Cr-3W-0.4Ti-2.0Y 2 o 3 (wt.%) Alloy

[0073] making process:

[0074] Step 1: According to the mass ratio of 1:5, weigh Y 2 o 3 100 g of powder and 500 g of partially gas-atomized Fe-14Cr-3W-0.4Ti (wt.%) iron-based pre-alloyed powder are 600 g in total and put into a ball mill jar. Among them, the iron-based pre-alloyed powder particle size is less than or equal to 150μm, Y 2 o 3 Powder particle size is less than or equal to 10μm. According to the ball-to-material ratio of 15:1, the diameter of the grinding balls is 20mm:15mm:10mm:8mm:5mm:3mm=1:1:1:1:1:1, weigh 9000g of grinding balls and put them into the ball milling tank.

[0075] Step 2: Seal the ball mill tank, vacuumize it, the vacuum degree is less than or equal to 0.1Pa, and fill it with high-purity argon.

[0076] Step 3: Put the ball mill tank into the vertical planetary ball mill for mechanical ball milling; set the parameters of the mechanical ball mill, the rotation speed is 260r / ...

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Abstract

The invention relates to a method for preparing a nano spherical oxide dispersion strengthening phase, and provides a method for preparing the nano spherical oxide dispersion strengthening phase by adopting micron oxide for the first time. Firstly, nano oxide / matrix alloy composite powder with a completely amorphous structure is prepared by taking the micron oxide as a raw material and adopting astaged mechanical ball milling method. According to the preparation method, ball milling is carried out at the first stage, so that the oxide is subjected to crushing and structural transformation, nanocrystallization and complete amorphization are realized, and composite powder in which the nano oxide with a complete amorphous structure is uniformly distributed in matrix alloy powder is prepared;and in the second stage, the composite powder obtained in the first stage and the remaining matrix alloy powder are subjected to ball milling and evenly mixed. Then, the prepared powder is sequentially subjected to hot forming, hot rolling and heat treatment, and the nano spherical oxide dispersion strengthened alloy is obtained. According to the method, the dispersion strengthening effect of anoxide phase can be obviously improved, and the room-temperature and high-temperature mechanical properties of the alloy are obviously improved. The method is simple, the production efficiency is high,the prepared alloy is excellent in performance, and the strength and plasticity of the alloy are obviously superior to those of the same type of alloy.

Description

technical field [0001] The invention relates to a method for preparing a nano-spherical oxide dispersion strengthening phase, which belongs to the field of powder metallurgy materials. Background technique [0002] Oxide dispersion strengthened (ODS) alloys have excellent mechanical properties, oxidation resistance and high temperature corrosion resistance, and have broad application prospects. [0003] At present, ODS alloys are mainly prepared by introducing oxides into the alloy matrix by mechanical alloying (MA), internal oxidation and other methods to prepare ODS alloys. Usually, Y 2 o 3 The oxide powder is mixed with the raw material powder, dispersed into the powder by mechanical ball milling, and then powder-formed to obtain an oxide dispersion alloy [T Okuda, et al, J Mater Sci Lett14 (1995) 1600; Y Kimura, et al , ISIJ International 39(1999)176]; or after long-term mechanical alloying, Y 2 o 3 Decompose into Y and O atoms, solid dissolve in the Fe matrix, form...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F3/20B22F3/17B22F3/15C22C33/02
CPCB22F9/04B22F3/20B22F3/17B22F3/15C22C33/0235B22F2009/043
Inventor 刘祖铭卢思哲李全魏冰周旭农必重任亚科艾永康曹镔
Owner CENT SOUTH UNIV
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