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

Novel Fe-based spherical shielding alloy powder and preparation method thereof

A technology of alloy powder and base alloy, which is applied in the field of new Fe-based spherical shielding alloy powder and its preparation, can solve the problems such as the need to optimize the microscopic uniformity of alloy elements, the limited effect of γ-ray shielding, and the small relative atomic mass, so as to ensure comprehensive Shielding performance, improving corrosion resistance, improving the effect of balanced electrode potential

Active Publication Date: 2021-12-17
SICHUAN UNIV
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has some disadvantages: in the boron-containing stainless steel powder, the relative atomic mass of Fe, Ni, Cr and other elements is small, and the shielding effect on gamma rays is limited
At the same time, B elements segregate on the grain boundaries of the matrix, and the microscopic uniformity of alloy elements needs to be optimized

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
  • Novel Fe-based spherical shielding alloy powder and preparation method thereof
  • Novel Fe-based spherical shielding alloy powder and preparation method thereof
  • Novel Fe-based spherical shielding alloy powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The present invention provides a preparation method of Fe-based shielding alloy powder with high sphericity, high fluidity and excellent comprehensive shielding performance described in the above technical solution, comprising the following steps:

[0050] Under the protection condition of argon, the alloy raw material is smelted and atomized in the atomization equipment, and the sieved atomized powder is subjected to vacuum heat treatment and ball milling to obtain Fe-based alloy shielding powder. The melting temperature is 1600-1700° C.; the atomization pressure of the alloy is 3.5-5.5 MPa; the intermediate heat temperature of the alloy powder is 900-1200° C., and the heat treatment time is 0.5-3 hours. The rotational speed of the ball mill is 50-300r / min, and the milling time is 0.5-3h. The chemical composition of the alloy powder is consistent with the composition of the Fe-based shielding alloy powder described in the above technical solution.

[0051] In the pres...

Embodiment 1

[0066] An Fe-based shielding alloy powder with high sphericity, high fluidity and good comprehensive shielding performance: 67.2% Fe, 13% Cr, 18.7% W, 1.1% B. The preparation method of the alloy is as follows: add industrial pure iron, ferrotungsten, and ferrochrome into the magnesia crucible according to the ratio of ingredients, add ferroboron into the secondary feeding hopper, charge the material tightly, vacuumize until the vacuum degree is 4Pa, and fill Enter argon gas to 0.1MPa (micro positive pressure), smelt at 1650°C until industrial pure iron, ferrotungsten, and ferrochrome are completely melted to form an alloy liquid, add ferroboron in the secondary feeding hopper, and refine for 3 minutes; wait for the alloy liquid After the temperature reaches 1700°C, it is poured into the tundish, and the alloy melt is atomized and powdered with an argon atomization pressure of 4 MPa, and the powder is collected. Subsequently, the collected powder was heat-treated in a vacuum tu...

Embodiment 2

[0070] An Fe-based shielding alloy powder with high sphericity, high fluidity and good comprehensive shielding performance: 65.2% Fe, 15% Cr, 18.7% W, 1.1% B. The preparation method of the alloy is as follows: add industrial pure iron, ferrotungsten, and ferrochrome into the magnesia crucible according to the ratio of ingredients, add ferroboron into the secondary feeding hopper, charge the material tightly, vacuumize until the vacuum degree is 4Pa, and fill Enter argon gas to 0.1MPa (slightly positive pressure), smelt at 1680°C until industrial pure iron, ferrotungsten, and ferrochrome are completely melted to form alloy liquid, add ferroboron in the secondary feeding hopper, and refine for 3 minutes; wait for the alloy liquid After the temperature reaches 1730°C, it is poured into the tundish, and the alloy melt is atomized and powdered with an argon atomization pressure of 4 MPa, and the powder is collected. Subsequently, the collected powder was heat-treated in a vacuum tu...

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
Fluidityaaaaaaaaaa
D50aaaaaaaaaa
Fluidityaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of nuclear radiation shielding materials, and particularly discloses novel Fe-based spherical shielding alloy powder and a preparation method thereof. The novel Fe-based spherical shielding alloy powder has excellent gamma ray and thermal neutron shielding performance. Components of the Fe-based alloy powder comprise, by weight percent, 13.6-28.9% of W, 0.8-1.7% of B, 0-15.0% of Cr and the balance Fe. Raw materials are weighed according to the components of the alloy powder and the component proportion, smelting and atomization are carried out under argon protection to obtain the alloy powder, then heat treatment and ball milling dispersion are carried out on the alloy powder, and finally the alloy powder which is high in sphericity degree and fluidity, uniform in boride phase distribution and good in comprehensive shielding performance is obtained. The Fe-based shielding alloy powder can be widely applied to the field of filling of special-shaped structures for nuclear radiation shielding and the field of repairing of Fe-based shielding body materials.

Description

technical field [0001] The invention relates to the field of nuclear radiation shielding materials, in particular to a novel Fe-based spherical shielding alloy powder and a preparation method thereof. Background technique [0002] Nuclear energy is a clean energy with stable structure and high energy density, and it is a beneficial supplement to human energy supply. In a nuclear energy system, the reactor is the core part. In a nuclear reactor, various radiation rays produced by nuclear fission (or fusion), such as neutrons of different energy levels, gamma rays, secondary gamma rays and other charged particles and high-energy rays, these rays can directly harm the human body, and can also pass through Pollution of air, soil, water and food, etc., indirectly causing damage to the human body. After a certain dose of radiation enters the human body, it will ionize the tissues of the human body, resulting in cell deformation, tissue damage, and diseases such as organ dysfunct...

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): B22F1/00C22C38/12C22C38/22C22C38/32B22F9/08B22F9/04G21F1/08
CPCC22C38/12C22C38/22C22C38/32B22F9/082B22F9/04G21F1/085B22F2009/043B22F2009/0848Y02E30/30
Inventor 刘颖李军孙伦高陈康为
Owner SICHUAN 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