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A kind of oxide dispersion strengthened iron-based alloy powder and its characterization method

A dispersion-strengthening, iron-based alloy technology, applied in metal processing equipment, instruments, material analysis using wave/particle radiation, etc., can solve problems such as public reports of unseen research results

Active Publication Date: 2020-04-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no public reports of relevant research results at home and abroad

Method used

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  • A kind of oxide dispersion strengthened iron-based alloy powder and its characterization method
  • A kind of oxide dispersion strengthened iron-based alloy powder and its characterization method
  • A kind of oxide dispersion strengthened iron-based alloy powder and its characterization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Embodiment 1: Fe-14Cr-3W-0.4Ti-1.5Y 2 o 3 (wt.%) Preparation of alloy powder

[0078] Powder preparation:

[0079] First, weigh the gas-atomized Fe-14Cr-3W-0.4Ti (wt.%) iron-based pre-alloyed powder and Y 2 o 3 A total of 150g of powder was put into a ball mill jar. Among them, the iron-based pre-alloyed powder particle size is less than or equal to 150μm, Y 2o 3 Powder particle size is less than or equal to 45μm. According to the ball-to-material ratio of 10:1, the diameter of the grinding balls is 20mm:15mm:10mm:8mm:5mm:3mm=1:1:1:1:1:1, weigh 1500g of grinding balls and put them into the ball milling tank.

[0080] 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.

[0081] 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, and the mechanical ball milling ...

Embodiment 2

[0094] Embodiment 2: Fe-14Cr-3W-0.4Ti-1.0Y 2 o 3 (wt.%) Preparation of alloy powder

[0095] Powder preparation:

[0096] First, according to the mass ratio of 99:1, weigh the gas-atomized Fe-14Cr-3W-0.4Ti (wt.%) iron-based pre-alloyed powder and Y 2 o 3 A total of 150g of powder was 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 75μm. According to the ball-to-material ratio of 10:1, the diameter of the grinding balls is 20mm:15mm:10mm:8mm:5mm:3mm=1:1:1:1:1:1, weigh 1500g of grinding balls and put them into the ball milling tank.

[0097] 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.

[0098] 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 320r...

Embodiment 3

[0121] Using the oxide dispersion strengthened iron-based alloy powder prepared in Example 1, the iron-based alloy with multi-scale and multi-phase dispersion strengthened is prepared through hot extrusion forming, hot rolling and heat treatment in sequence.

[0122] Alloy preparation:

[0123] The first step: put the above-mentioned alloy iron-based powder into a pure iron sheath, vacuumize to less than or equal to 0.1Pa, and seal and weld the trachea. Carry out hot extrusion forming, the hot extrusion parameters are: extrusion temperature 850°C, extrusion speed 15mm / s, extrusion ratio 10:1; then use wire cutting to separate the sheath to obtain ODS iron-based alloy after thermoforming.

[0124] The second step: hot-rolling the hot-extruded ODS iron-based alloy, the hot-rolling parameters are: temperature 850°C, total deformation 80%.

[0125] Step 3: heat-treat the hot-rolled ODS iron-based alloy, and the heat-treatment parameters are as follows: temperature 950° C., heat p...

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Abstract

The invention relates to an oxide dispersion strengthened iron-based alloy powder and a characterization method thereof. The alloy powder contains a matrix and a strengthening phase; the strengthening phase includes at least two kinds of strengthening phase particles with different sizes, wherein the volume of the particles with a particle size less than or equal to 50nm accounts for 85-95% of the total volume of all strengthening particles; the matrix It is Fe‑Cr‑W‑Ti alloy. The characterization method is as follows: the strengthening phase is separated from the powder matrix by electrolysis, and the strengthening phase is analyzed and characterized by an electron microscope.

Description

technical field [0001] The invention relates to an oxide dispersion strengthened iron-based alloy powder and a characterization method thereof, belonging to the field of powder metallurgy materials. Background technique [0002] Oxide dispersion-strengthened alloy powder is the raw material for preparing high-performance oxide dispersion-strengthened alloys. Its microstructure, especially the size, morphology and structure of the strengthening phase, plays a decisive role in the performance of powder formed products. The preparation of oxide dispersion strengthened alloy powder with uniform structure, oxide dispersion distribution, size and structure diversification is the key to prepare high performance oxide dispersion strengthened alloy. [0003] Rieken et al [JRRieken, et al.Journal of nuclear materials 2012,428(1-3):65-75] used reactive gas atomization method to prepare oxide dispersion strong alloy powder, using Ar-O 2 The gas was atomized, and it was found that a Cr-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F1/00C22C38/22C22C38/28G01N23/04G01N23/20091G01N23/2251B22F1/052
CPCG01N23/04G01N23/20091G01N23/2251C22C32/0026C22C38/22C22C38/28B22F9/04B22F2009/043G01N2223/071G01N2223/0563G01N2223/03B22F1/052C22C33/0292C22C33/0207B22F2009/041B22F2998/10B22F2201/10B22F2301/35B22F2302/25
Inventor 刘祖铭李全黄伯云吕学谦彭凯赵凡
Owner CENT SOUTH UNIV
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