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

Oxide-dispersion-strengthened low-activation steel and preparation method thereof

A low-activation steel and dispersion strengthening technology, applied in the field of radiation-resistant metal materials, can solve the problems of high purity requirements of pure metal powder, difficult control of impurity content, and difficulty in preparing activated steel, so as to improve purity and density, Improving the high temperature mechanical properties and the effect of improving the mechanical properties

Active Publication Date: 2016-01-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF5 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth metals Y and Y 2 o 3 These characteristics of oxide particles make the preparation of oxide dispersion strengthened low activation steel more and more difficult
At present, many research teams in Europe, America, Japan and other countries adopt the method of mechanically alloying various pure metal powders to prepare oxide dispersion strengthened low-activation steels. However, this preparation method requires high purity of pure metal powders, and the impurity content is difficult. control

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-strengthened low-activation steel and preparation method thereof
  • Oxide-dispersion-strengthened low-activation steel and preparation method thereof
  • Oxide-dispersion-strengthened low-activation steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The mechanical alloying method is used to prepare oxide dispersion strengthened low activation steel. The specific process parameters are as follows:

[0048] The chemical composition of the smelting master alloy is: C: 0.093wt.%, Cr: 8.96wt.%, W: 1.51wt.%, V: 0.20wt.%, Ta: 0.14wt.%, Mn: 0.51wt.% , Al 3.5Mpa, overheating degree> At 200°C, the protective atmosphere is 99.99% argon. Add 0.3% of nanometer Y to the master alloy atomized powder 2 O 3 After 50 hours of high-energy ball milling (the mass ratio of ball to material is 10:1, the ball milling medium is Φ6 and Φ10 mixed hard steel balls, and the ball milling atmosphere is 99.99% Ar), the powder is mixed uniformly, and the air is pumped through the powder jacket (10 -1 Pa / 450℃ / 4h) and hot isostatic pressing method sintered and solidified (1200℃ / 150MPa / 4h), and finally after hot rolling (open rolling at 1100℃, rolling 5 passes, the reduction of each pass is 18- 25%) and heat treatment (normalizing 980℃ / 60min / air coolin...

Embodiment 2

[0050] The difference from the preparation method in Example 1 is that 0.48% of nanometer Y is added to the master alloy atomized powder. 2 O 3 After 40 hours of high-energy ball milling (the ball-to-material mass ratio is 10:1, the ball milling medium is Φ6 and Φ10 mixed hard steel balls, the ball milling atmosphere is 99.99% Ar), the powder is mixed uniformly, and the air is pumped through the powder jacket (10 -1 Pa / 500℃ / 4h) and hot isostatic pressing method sintered and solidified (1200℃ / 120MPa / 3.5h), and finally after hot rolling (starting at 1200℃, rolling 6 passes, the reduction of each pass is 18 -25%) and heat treatment (normalizing 980°C / 60min / air cooling + tempering 760°C / 90min / air cooling) to obtain the final oxide dispersion strengthened low activation steel.

Embodiment 3

[0052] The difference from the preparation method of Example 1 is that 0.3% of nanometer Y is added to the atomized powder of the master alloy. 2 O 3 After 70h of high-energy ball milling (ball-to-battery ratio is 10:1, ball milling medium is Φ6 and Φ10 mixed hard steel balls, ball milling atmosphere is 99.99% Ar), the powder is mixed uniformly, and the air is pumped through the powder jacket (10 -1 Pa / 450℃ / 4h) and hot isostatic pressing method sintered and solidified (1100℃ / 140MPa / 3h), and finally undergoes hot rolling (1150℃ open rolling, rolling 5 passes, and the reduction of each pass is 18- 25%) and heat treatment (normalizing 980°C / 60min / air cooling + tempering 760°C / 90min / air cooling) to obtain the final oxide dispersion strengthened low activation steel.

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
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention aims at providing oxide-dispersion-strengthened low-activation steel applicable to fusion reactor and a preparation method thereof. The technical scheme is characterized in that the low-activation steel comprises the following alloy elements in percent by mass, Fe as the matrix, 0.08%<=C<=0.15%, 8.0%<=Cr<=10.0%, 1.1%<=W<=1.55%, 0.1%<=V<=0.3%, 0.03%<=Ta<=0.2%, 0.1<=Mn<=0.6%, 0.05%<=Y2O3<=0.5%, and a little amount of impurities inevitably mixed during manufacture. The easily-activated elements and impurity elements all capable of generating radionuclides after being subjected to neutron irradiation are strictly controlled according to the following content requirements: N<0.010%, Al<0.010%, Ni<0.005%, Mo<0.005%, Nb<0.010%, Cu<0.010%, P<0.005%, and S<0.005%. The oxide-dispersion-strengthened low-activation steel is uniform in microstructure and excellent in mechanical properties.

Description

Technical field [0001] The invention belongs to the field of radiation-resistant metal materials, and specifically relates to an oxide dispersion strengthened low-activated steel used for fusion reactors, which can resist strong neutron radiation and has excellent mechanical properties. Background technique [0002] As the world energy crisis intensifies, clean energy will become an important strategic development resource. Among them, the process of nuclear power generation can achieve zero pollution emissions, and the energy density of nuclear fuel is several million times higher than that of fossil fuels. Therefore, nuclear power will bring huge profits to commercial power stations in the future. In the future, the service environment of structural materials for commercial fusion fission reactors will be harsh and harsh, which puts forward higher performance requirements for nuclear reactor structural materials. Low activation ferritic martensitic steel has low activation per...

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): C22C38/48C22C33/02C21D8/00
Inventor 单以银胡雪黄礼新严伟王开阳
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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