Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Oxide dispersion strengthening iron-base alloy powder and characterization method thereof

A technology of dispersion strengthening and iron-based alloys, 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: 2018-11-30
CENT SOUTH UNIV
View PDF8 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oxide dispersion strengthening iron-base alloy powder and characterization method thereof
  • Oxide dispersion strengthening iron-base alloy powder and characterization method thereof
  • Oxide dispersion strengthening iron-base alloy powder and characterization method thereof

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to oxide dispersion strengthening iron-base alloy powder and a characterization method of the oxide dispersion strengthening iron-base alloy powder. The alloy powder comprises abase body and a strengthening phase, the strengthening phase comprises at least two kinds of strengthening phase particles with different sizes, the volume of particles with the diameter smaller thanor equal to 50nm accounts for 85-95% of the total volume of the strengthening particles, and the base body is Fe-Cr-W-Ti alloy. The characterization method of the oxide dispersion strengthening iron-base alloy powder comprises the steps that the strengthening phase is separated from the powder base body through electrolysis, and an electron microscope is adopted for analyzing and characterizing the strengthening phase.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22F9/04B22F1/00C22C38/22C22C38/28G01N23/04G01N23/20091G01N23/2251B22F1/052
CPCG01N23/04G01N23/20091G01N23/2251C22C32/0026C22C38/22C22C38/28B22F9/04B22F2009/043G01N2223/071G01N2223/0563G01N2223/03B22F1/052C22C33/0292C22C33/0207B22F2009/041B22F2998/10B22F2201/10B22F2301/35B22F2302/25G01N1/34G01N1/4044G01N1/4077
Inventor 刘祖铭李全黄伯云吕学谦彭凯赵凡
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com