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Method for preparing oxide dispersion strengthened steel through high-flux continuous smelting

A dispersion strengthening and oxide technology, applied in the field of metal materials, can solve the problems of long period of optimization of alloy composition, inability to meet the influence of the control of composition, structure, size and distribution, poor stability between batches, etc., so as to reduce the development time. and cost, high-throughput continuous preparation, and the effect of reducing R&D costs

Active Publication Date: 2020-06-30
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention overcomes many problems brought about by the existing PM-ODS steel preparation process, such as complex process, long process, poor single production capacity, poor stability between batches, etc., and provides a short process, high output, stability and Economical ODS Steel Preparation Process
Although this method currently has the highest single-batch output and the shortest time-consuming ODS steel preparation process in the whole process, each furnace can only melt and cast steel with one component, and the optimization cycle of alloy components is long and costly. The need to study the influence of the alloy composition of the material on the composition, structure, size and distribution of nano-oxides or clusters

Method used

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  • Method for preparing oxide dispersion strengthened steel through high-flux continuous smelting
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  • Method for preparing oxide dispersion strengthened steel through high-flux continuous smelting

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] Put 10mg, 30mg, 60mg and 90mg Fe in 4 crucibles respectively 2 o 3 Powder. Its concrete preparation method comprises the following steps:

[0060] Add 10mg, 30mg, 60mg and 90mg Fe into the numbered crucible 2 o 3 powder, and rest the crucible on the multi-crucible platform of the high-throughput melting equipment. Among them, high-throughput melting equipment is equipment for vacuum induction continuous melting and high-throughput preparation of metal materials, including automatic feeding device, multi-crucible platform, induction melting device, PLC control device and vacuum for realizing vacuum & atmosphere melting environment & atmosphere system.

[0061] Place the prefabricated mother steel bar on the automatic feeding device and start the vacuuming operation. When the vacuum degree reaches 0.01Pa, the feeding device & melting device are powered on.

[0062] After being energized, the automatic feeding device drives the steel rod to deliver to the smelting coi...

Embodiment 1

[0064] Please also see attached figure 1 , a CNS I ODS steel with different microalloy compositions prepared by using the above equipment and method, wherein the percentages of each element of the master alloy to the total mass are: C: 0.08%, Cr: 9.0%, W: ~2.1% , N: 0.05%, Si, 0.1%, Nb: 0.1%, Mo: 0.3% V, 0.5%, B<0.001%, S<0.003%, P<0.005%, Y, 0.3%, Fe balance.

[0065] The percentages of each element in the total mass of the four ODS steels produced are:

[0066]1. C: 0.08%, Cr: 9.0%, W: ~2.1%, N: 0.05%, Si, 0.1%, Nb: 0.1%, Mo: 0.3%, V, 0.5%, B<0.001%, S<0.003 %, P<0.005%, Y, 0.3%, Fe balance.

[0067] 2. C: 0.08%, Cr: 9.0%, Mn: 0.45%, W: ~2.1%, Nb: 0.1%, Mo: 0.3%, N: 0.05%, Si: 0.1%, V: 0.5%, B<0.001 %, S<0.003%, P<0.005%, Y, 0.3%, Fe balance.

[0068] 3. C: 0.08%, Cr: 9.0%, Mn: 0.45%, W: ~2.1%, Nb: 0.1%, Mo: 0.3%, N: 0.05%, Ta, 0.10%, Si, 0.1%, V: 0.5 %, B<0.001%, S<0.003%, P<0.005%, Y, 0.3%, Fe balance.

[0069] 4. C: 0.08%, Cr: 9.0%, Mn: 0.45%, W: ~2.1%, N: 0.05%, Nb...

Embodiment 2

[0076] The prepared CNS I ODS steel, the percentage of the master alloy containing rare earth elements in the total mass: C: 0.08%, Cr: 9.0%, N: 0.05%, Mn: 0.45%, Ta: 0.10%, B<0.001% , S<0.003%, P<0.005%, Y: 0.3%, Fe balance.

[0077] Put 10mg, 30mg, 60mg, 90mg, 120mg, 150mg, 180mg, 210mg, 240mg, 270mg Fe2O3 powder into 12 crucibles respectively. Its specific preparation method comprises the following steps:

[0078] Add 10mg, 30mg, 60mg, 90mg, 120mg, 150mg, 180mg, 210mg, 240mg, 270mg of Fe into the numbered crucible 2 o 3 powder, and rest the crucible on the multi-crucible platform of the high-throughput melting equipment. Among them, high-throughput melting equipment is equipment for vacuum induction continuous melting and high-throughput preparation of metal materials, including automatic feeding device, multi-crucible platform, induction melting device, PLC control device and vacuum for realizing vacuum & atmosphere melting environment & atmosphere system.

[0079] Pla...

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Abstract

The invention belongs to the field of a metal material, and particularly relates to a method for preparing oxide dispersion strengthened steel through high-flux continuous smelting. The method particularly comprises the steps of S1, selecting all raw materials according to components of the oxide dispersion strengthened steel of different oxide particles or clusters needed to be prepared by design: oxides of iron and mother alloy containing rare earth; S2, placing the oxides of the iron with different proportions into multiple smelting containers for standby application; and S3, heating and smelting the mother alloy containing rare earth, dropping in the smelting containers with the oxides of iron, and after cooling, obtaining multiple kinds of oxide dispersion strengthened steel with different contents. According to the method, the advantages of a method of smelting preparing of ODS are fused, ODS steel of different alloy components can be rapidly prepared largely within the extremelyshort time, meanwhile, the ODS steel prepared through the method can meet the subsequent heat machining, heat treatment and property detection no matter size or quality, and the development time andcost of research preparing can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a method for preparing oxide dispersion strengthened steel by high-throughput continuous melting. Background technique [0002] The harsh working environment of advanced nuclear energy systems - high temperature, high helium, high stress, strong corrosive environment and high-energy neutron radiation, etc., puts forward extremely high requirements on the high temperature performance and radiation resistance performance of structural materials. Oxide Dispersion Strengthened (ODS) steel matrix is ​​dispersed with high number density (>1023m-3), nanoscale oxide particles or clusters, which have good high temperature mechanical properties and radiation stability. Therefore, ODS steel has become one of the main candidate materials for structural materials in advanced nuclear energy systems; but as mentioned above, the reason why ODS steel has such excellent high temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C32/00C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32
CPCC22C32/0026C22C33/06C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32
Inventor 燕青芝曹正宇洪志远张晓新
Owner UNIV OF SCI & TECH BEIJING
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