CN102127714A - Nano-cluster-strengthened iron-base superalloy - Google Patents
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Abstract
The invention relates to nano-cluster-strengthened iron-base superalloy, which comprises the following components: Fe-(13-15)Cr-(2.5-3.5)W-(0.35-0.6)Ti-(0.2-0.6)Y-(0.05-0.20)O, wherein Y and O are used as alloy elements, O is introduced into the alloy as an alloy element, O element and pure metal Y replace Y2O3 particles added directly to serve as reinforced mass point, gas-atomized alloy powder replaces mechanically-alloyed powder so as to more accurately control oxygen content, and the alloys in different batches have uniform performance and good repeatability. The final product can be effectively controlled to form nano clusters or nano oxides in dispersed distribution; and the produced alloy has high purity and no alloy pollution problem caused by mechanically-alloyed powder; and the oxide is finer and disperses evenly. The production method provided by the invention has simple process, high production efficiency and low cost, can be used for preparing large size material, and is favorable for large-scale production and application.
Description
Technical field
The present invention relates to a kind of nanocluster reinforced iron-base superalloy.Belong to metal material field.
Background technology
Oxide dispersion intensifying (oxide dispersion strengthened, ODS) alloy is the alloy (being called the ODS alloy) that utilizes superfine oxide with high thermal stability and chemical stability that alloy substrate is strengthened, have multiple strengthening mechanisms such as dispersion-strengthened and precipitation strength concurrently, having excellent mechanical behavior under high temperature and antioxidant property, is a class high-performance powder metallurgy superalloy.The preparation oxide-dispersed alloy mainly is to adopt mechanical alloying (MA) method that the superfine oxide uniform particles is distributed to the powdered alloy matrix at present, obtains after fixed shaping and subsequent disposal then.
Recently, when research mechanical alloying oxide-dispersed alloy (MA/ODS), find, minority phenomenon occurred increasing substantially by the over-all properties of the oxide dispersion intensifying ferrous alloy of prepared by mechanical alloy, use temperature is brought up to 850 ℃ from 550 ℃, and the creep-resistant property under 600-850 ℃ of high temperature also is greatly improved.Its analysis of Ultrastructure is found, had the dispersion-strengthened phase that is of a size of tens nanometers in the matrix of this ferrous alloy, have high high-temperature stability, this is the reason that makes that the performance of ferrous alloy increases substantially.Further analyze and find that this strengthening phase is that nanocluster mode with elements such as enrichment Y, Ti and O exists in alloy, high dispersing is in alloy substrate.This on ODS alloy basis, develop with nanocluster as strengthening unitary powder metallurgy iron-base superalloy, have high ductility, the high tenacity of high strength, high antioxygenic property and the precipitation strength superalloy of oxide dispersion intensifying superalloy concurrently, have good heat transfer performance and anti-void swelling performance, being with a wide range of applications in industries such as aircraft engine, internal combustion turbine, nuclear reactor and automobile, glass, is the important structure material of development the 4th generation nuclear reactor.
At present, the research of nanocluster reinforced iron-base superalloy is in the starting stage, and its preparation method mainly is to adopt mechanical alloying (MA) powdered alloy, through prepared such as hot consolidation shaping, follow-up deformation processing and thermal treatments.For example:
Chinese patent CN200810021329.0, oxide dispersion strengthening low activity martensitic steel material and preparation method thereof, disclosing a kind of composition is (massfraction) 8.5-9.5%Cr, 1.3-1.7%W, 0.15-0.25%V, 0.12-0.18%Ta, 0.4.-0.5.Mn, 0.08-0.12%C, 0.1.-0.50%Ti, 0.2-0.5%Y
2O
3Surplus is the oxide dispersion strengthening low activity martensitic steel material preparation method of Fe, adopt the mechanical alloying powder, carry out hot isostatic pressing or prepare base substrate at 1323～1473k/100～200MPa/2～5h, carry out hot extrusion or forging hot rolling etc. then and shape the prepared material requested at 1323～1573k/40～70MPa/2～5h hot pressed sintering.
Chinese patent CN200910083638.5, a kind of method for preparing oxide dispersion strengthened austenitic stainless steel, disclosing a kind of prepared by mechanical alloy composition is (massfraction) 17-19%Cr, 7-9%Ni, 1.5-2.5%W, 0.5-1.0%Ti, 0.3-0.6%Y
2O
3, surplus is the oxide dispersion intensifying powder of stainless steel of Fe, 1200 ℃/80MPa/2h hot pressed sintering prepares the stainless method of oxide dispersion intensifying.
United States Patent (USP) 5032190, ODS ferrous alloy method for processing sheet material, disclosing a kind of composition is (massfraction) 74%Fe, 20%Cr, 4.5%Al, 0.5%Ti and 0.5%Y
2O
3Mechanical alloying powdered preparation oxide compound reinforced iron-base alloy.
Document [D K Mukhopadhyay, F H Froes, D S Gelles.Development of oxide dispersion strengthened ferritic steels for fusion.J Nucl Mater 258-263 (1998) 1209-1215] reported that a kind of composition of the MA of employing powder hot-pressing preparation is Fe-13.5Cr-2W-0.5Ti-0.25Y
2O
3(massfraction %) oxide compound reinforced iron-base alloy.Document [R L Klueh, J P Shingledecker, R W Swindeman, D T Hoelzer.Oxide dispersion-strengthened steels:A comparison of some commercial and experimental alloys.J Nucl Mater 341 (2005) 103-114] reported that a kind of 12YWT ferrous alloy, its composition are (massfraction %) Fe-12Cr-2.5W-0.4Ti-0.25Y
2O
3, adopting particle diameter is the Y of 20nm
2O
3Carry out mechanical ball milling with pre-alloyed powder and prepare oxide compound reinforced iron-base powdered alloy, become base-extrusion molding to prepare block materials through powder compression again.
Document [M J Alinger, G R Odette, D T Hoelzer.The development and stability of Y-Ti-Onanoclusters in mechanically alloyed Fe-Cr based ferritic alloys.J Nucl Mater329-333 (2004) 382-386] reported that a kind of 14YWT ferrous alloy, its composition are (massfraction %) Fe-14Cr-3W-0.4Ti-0.25Y
2O
3, adopt 0.25%Y
2O
3Carry out mechanical ball milling with pre-alloyed powder and prepare oxide compound reinforced iron-base powdered alloy, being shaped through hot isostatic pressing prepares block materials again.
At first, above-mentioned alloy all adopts mechanical alloying (MA) method with element powder (pure metal powder), master alloyed powder, as the Y of disperse phase
2O
3Particle mix and through long-time high-energy ball milling [Ceng Delin. mmaterial. Beijing: metallurgical industry press, 1997], or adopt Y
2O
3Particle mixes with pre-alloyed powder, long-time high-energy ball milling, synthesis oxide disperse uniform alloy powder.Because MA preparation technology process of lapping inherent limitation, this method has following shortcoming: (1) introduces impurity: in the mechanical alloying process of lapping, because of long-time interaction the between alloy raw material, abrading-ball and the grinding drum introduced solid impurity, contaminated powders, the mechanical property of reduction alloy; (2) Control for Oxygen Content difficulty: oxygen level is subjected to raw material powder oxygen level and MA process control.The MA technology has been introduced and has been formed the required capacity oxygen of disperse oxide by adding oxide compound, and the oxygen of introducing from raw material powder and MA process can become impurity, seriously reduces alloy property.Because MA powder process needs to control raw material powder oxygen level and the oxygenation of MA process simultaneously, this makes MA technology be difficult to control oxygen content in power; (3) process cycle is long: obtain complete alloying and make the finely dispersed powdered alloy of hardening oxidation thing with high thermal stability and chemical stability, need long-time high-energy ball milling, process cycle is long, yields poorly, production efficiency is low, and preparation brings difficulty to large-scale industrial; (4) poor repeatability: the size of oxide compound and dispersity are limited by the original size of mechanical milling process and oxide raw material, and be repeatable poor, causes the alloy mass instability.
Secondly, present hot consolidation manufacturing process mainly is to adopt mechanical alloying powdered alloy hot isostatic pressing, hot pressed sintering or mold pressing-sintering, technologies such as deformation processing.For example:
Chinese patent CN200810021329.0, oxide dispersion strengthening low activity martensitic steel material and preparation method thereof, disclosing a kind of composition is (massfraction) 8.5-9.5%Cr, 1.3-1.7%W, 0.15-0.25%V, 0.12-0.18%Ta, 0.4.-0.5.Mn, 0.08-0.12%C, 0.1.-0.50%Ti, 0.2-0.5%Y
2O
3Surplus is the oxide dispersion strengthening low activity martensitic steel material preparation method of Fe, adopt the mechanical alloying powder, carry out hot isostatic pressing or prepare base substrate at 1323～1473k/100～200MPa/2～5h, carry out hot extrusion or forging, hot rolling etc. then and shape the prepared material requested at 1323～1573k/40～70MPa/2～5h hot pressed sintering.
Chinese patent CN200910083638.5, a kind of method for preparing oxide dispersion strengthened austenitic stainless steel, disclosing a kind of prepared by mechanical alloy composition is (massfraction) 17-19%Cr, 7-9%Ni, 1.5-2.5%W, 0.5-1.0%Ti, 0.3-0.6%Y
2O
3, surplus is the oxide dispersion intensifying powder of stainless steel of Fe, 1200 ℃/80MPa/2h hot pressed sintering prepares the stainless method of oxide dispersion intensifying.
United States Patent (USP) 5032190, ODS ferrous alloy method for processing sheet material, disclosing a kind of composition is (massfraction) 74%Fe, 20%Cr, 4.5%Al, 0.5%Ti and 0.5%Y
2O
3Mechanical alloying iron(-)base powder hot pressing-hot rolling-cold roll forming prepares the method for sheet material.
Chinese patent CN200610031607.1, method for producing dispersion strengthening copper alloy materials discloses a kind of MA of utilization and has prepared powdered alloy-high temperature sintering base body-hot-pressed preparation oxide dispersion intensifying Cu alloy material technology.
Adopt the alloy of hot isostatic pressing, hot-pressing sintering technique preparation, density is lower, the equipment complexity, and also the scantling of preparation is limited, has limited its Application Areas, makes its excellent properties to be not fully exerted.
The nanocluster that the disperse of nanocluster reinforced iron-base alloy camber distributes is a kind of composite oxides that element such as Ti, Y, the O of enrichment forms, and forms the oxide compound of this nanoscale, needs the distribution of Y/Ti/O very even, and that the MA method is added is Y
2O
3Oxide compound disperses alloy substrate by the MA ball milling with this oxide compound, has only the oxide compound of minority nanoscale to meet and forms the nanocluster condition, forms nanocluster; Simultaneously, high temperature sintering prepares long-time high temperature action in the base substrate process, Y
2O
3Can become the core of Ti, Y, O composite oxides heterogeneous nucleation, the Y in the powder
2O
3+ Ti+O can be with Y
2O
3Assemble, grow up for core, be subjected to Y
2O
3The influence of distributing homogeneity, the formation of nanocluster and the homogeneity of distribution thereof become complicated and are difficult to control.Therefore, the nanocluster that forms in the ferrous alloy of method for preparing, repeatable relatively poor.
At the fixed shaping of atomizing iron(-)base powder, Chinese invention patent CN101265530A, a kind of preparation method of nano cluster dispersion strengthening iron-base alloy discloses a kind of atomizing iron-based pre-alloyed powder that adopts and has carried out that room temperature mold pressing, 1350 ℃/2h sintering prepares the forging base substrate, 900 ℃～1200 ℃ of forging and forming technologies prepare the method for cluster dispersion strengthening iron-base alloy.This method preparation technology is simple, but be difficult to prepare high performance nanocluster reinforced iron-base alloy, main drawback shows: room temperature mold pressing base substrate density is low, porosity is high because of powder metallurgy degree height, difficult distortion cause (1), high temperature sintering makes the powder surface oxidation for a long time simultaneously, these factors hinder the combination at powder interface and reduce bonding strength, thereby reduce the mechanical property of alloy; (2) deflection of sintered body heat forged deformation processing is little, and powder interface oxidation film is not easy to destroy, and residual oxide film forms the primary particle border easily, reduces the intensity of material; (3) the solid solution oxygen in the powder the long-time high temperature sintering of pressing blank (1350 ℃/2h) stage forms steady oxide, loses the condition that forms nanocluster.Particularly the blank sintering hole is difficult to eliminate through the less forging and molding of deflection, and prepared ferrous alloy performance is lower.
At the problems referred to above, this patent has proposed a kind of nanocluster reinforced iron-base alloy of powder extrusion forming preparation method preparation.
Summary of the invention
The object of the present invention is to provide a kind of nanocluster reinforced iron-base superalloy.The alloy density reaches 99%, room temperature strength σ after the thermal treatment
b〉=1200MPa, plasticity δ 〉=8%; 850 ℃ of intensity σ
b〉=100MPa.
A kind of nanocluster reinforced iron-base of the present invention superalloy, by mass percentage, form by following component:
Fe--(13～15)Cr--(2.5～3.5)W--(0.35～0.6)Ti--(0.2～0.6)Y--(0.05～0.20)O。
A kind of nanocluster reinforced iron-base of the present invention superalloy, by mass percentage, form by following component:
Fe--(13～13.9)Cr--(2.6～2.9)W--(0.35～0.39)Ti-(0.2～0.4)Y--(0.08～0.15)O。
A kind of nanocluster reinforced iron-base of the present invention superalloy, by mass percentage, form by following component:
Fe--(13～13.5)Cr--(2.5～2.8)W--(0.35～0.38)Ti-(0.3～0.5)Y--(0.10～0.13)O。
The preparation method of a kind of nanocluster reinforced iron-base of the present invention superalloy sketches in following;
Adopt Y and O as alloying element, form nanocluster or nanophase, replace directly adding Y by following process
2O
3As strengthening particle; Adopt gas atomization containing oxygen iron base alloy powder to replace the mechanical alloying powdered alloy, by hot consolidation shaping, deformation processing and thermal treatment, obtain the nanocluster strengthening phase that block materials and disperse distribute, concrete processing step is:
The first step: select the gas atomization iron(-)base powder of averaged oxygen content 0.05%～0.20% (massfraction) for use, described powder median size≤200 μ m, the Steel Capsule of packing into; To being evacuated to 10 in the jacket
-2Behind the Pa, the jacket powdered alloy is heated to 100 ℃～300 ℃ and continue to be evacuated to 10
-2Behind the Pa, more than the degasification 60min, jacket is sealed;
Second step: the jacket of the good seal that the first step is obtained and powdered alloy are at 850 ℃～1250 ℃ insulation 15min～45min, after treating the complete homogeneous heating of jacket powder, push, extrusion ratio is (6～15): 1, and the iron-base superalloy bar of acquisition high-compactness;
The 3rd step: after second bar that obtain of step removed jacket by machining, under 1050 ℃～1200 ℃, carry out vacuum annealing and handle 1h～1.5h, in air, cool off then, obtain the iron-base superalloy that nanocluster is strengthened.
Among the present invention, the close employing welded seal of described jacket: after finishing degasification, in jacket extraction pipe bottom above 40mm～60mm position local fast heating, when be heated to can be by the temperature of hammering seam after hammering tube sealing rapidly, repeat repeatedly to make the complete seam of extraction pipe inwall, remove unnecessary extraction pipe, and extraction pipe is sealed complete seam with welding machine;
Among the present invention, described being squeezed in the extrusion machine carried out; Extrusion mould is preheated to 300～400 ℃, uses Graphite Powder 99 as lubricant.
The present invention has following advantage and positively effect:
The present invention introduces alloy with O as alloying element, replaces directly adding Y with O element and pure metal Y
2O
3Particle is as strengthening particle, replace the mechanical alloying powder with gas atomization oxygen-containing alloy powder, by optimizing alloying constituent, introduce the room of an amount of concentration and control its distribution, prepare and have the nanocluster that disperse distributes or the iron-base superalloy of nano-oxide.
At first, the oxygen element of introducing atomizing replaces directly adding Y as alloying element with O element and pure metal Y
2O
3Particle is by the nanocluster or the nano-oxide of thermal treatment diffusion-precipitation distribution.
The gas atomization powder is by high-speed gas the uniform alloy melt of composition to be cooled fast to room temperature preparation to get, the segregation of having avoided equilibrium freezing to cause, being evenly distributed of powder matrix interalloy element and oxygen, above-mentioned composite oxides will form by homogeneous nucleation, thereby have guaranteed formed composite oxides highly dispersed; In the powder extrusion forming process, form the high density deformation defect by shearing strain, and the high density room that provides of atomization process, can effectively hinder this oxide compound gathering, grow up, can form nanocluster or the nano-oxide that disperse distributes thereby can effectively control final product.
Secondly, adopt the powder jacket hot-pressed-technologies such as deformation processing-thermal treatment, realized powder consolidation and be shaped synchronously that separating out with thermal treatment of oxide compound is synchronous, has reduced ma process and high-temperature sintering process, has shortened technical process.
The present invention has following advantage:
(1) O is introduced alloy as alloying element, replace directly adding Y with O element and pure metal Y
2O
3Particle is as strengthening particle, replace the mechanical alloying powder with the gas atomization powdered alloy, can effectively control final product and can form nanocluster or the nano-oxide that disperse distributes, prepared alloy purity height does not have the alloy pollution problem that mechanical alloying powder brings;
(2) the solid solution oxygen distribution in the gas atomization powder is even, and the oxide compound that helps separating out is more tiny, disperse is even;
(3) adopt the gas atomization powder to replace the mechanical alloying powder, accurately controlling oxygen content more, the performance of different batches alloy is even, favorable repeatability;
(4) preparation technology is simple, the production efficiency height, and cost is low, can prepare the large size material, helps scale preparation and application.
In sum, the invention provides a kind of nanocluster or nano-oxide phase reinforced iron-base superalloy, adopt powder extruding-deformation processing-thermal treatment process preparation, the alloy density of preparation reaches 99%, room temperature strength σ after the thermal treatment
b〉=1200MPa, plasticity δ 〉=8%; 850 ℃ of intensity σ
b〉=100MPa.
Description of drawings:
Among Fig. 1: 1,2,3 nano-oxides for formation.
Embodiment
The present invention proposes a kind of nanocluster reinforced iron-base superalloy, composition is Fe--(13～15) Cr--(2.5～3.5) W--(0.35～0.6) Ti-(0.2～0.6) Y--(0.05～0.20) O (massfraction %), O is introduced alloy as alloying element, replace directly adding Y with O element and pure metal Y
2O
3Particle is as strengthening particle, replace the mechanical alloying powder with the gas atomization powdered alloy, by hot-pressed preparation nanophase reinforced iron-base superalloy, can effectively control final product and can form nanocluster or the nano-oxide that disperse distributes, the specific embodiment of the present invention is described further below in conjunction with example and accompanying drawing:
Embodiment 1: a kind of composition is the nanophase reinforced iron-base superalloy of Fe-13.8Cr-3.1W-0.42Ti-0.27Y-0.08O (massfraction %)
Selecting particle diameter for use is that≤200 μ m, averaged oxygen content are gas atomization Fe-13.8Cr-3.1W-0.42Ti-0.27Y-0.08O (massfraction %) powdered alloy of 0.08% (massfraction), pack into behind the Steel Capsule, with the vacuum unit jacket that installs powder is carried out vacuum stripping, vacuum tightness reaches 10
-2Pa also continues to bleed more than the 30min, then the jacket powder is heated to 150 ℃ and continue to vacuumize and reach 10
-2Behind the Pa, more than the degasification 60min, in the extraction pipe bottom of jacket above 40mm～60mm position local fast heating, when be heated to can be by the temperature of the complete seam of hammering after hammering rapidly, repeat repeatedly to make the complete seam of extraction pipe inwall, remove unnecessary extraction pipe, and dead with welding machine in the weldering of extraction pipe sealing part.
The jacket powder of good seal makes the complete homogeneous heating of jacket powder at 1100 ℃ of heating 20min, pushes then, obtains the bar of high-compactness, and extrusion ratio is 6: 1, and extrusion mould is heated to 300 ℃～400 ℃, uses Graphite Powder 99 as lubricant.Remove the jacket of extruded bars periphery by machining, obtain iron-base superalloy, density of material is 7.75 * 10
3Kg/m
3, relative density reaches more than 99%.Through follow-up distortion and thermal treatment, obtain the iron-base superalloy that nanocluster is strengthened, its room temperature strength σ
b〉=1200MPa, plasticity δ 〉=8%, intensity σ in the time of 850 ℃
b〉=1OOMPa.
Embodiment 2: a kind of composition is the nanophase reinforced iron-base superalloy of Fe-13.9Cr-2.6W-0.38Ti-0.32Y-0.11O (massfraction %)
Selecting particle diameter for use is that≤200 μ m, averaged oxygen content are gas atomization Fe-13.9Cr-2.6W-0.38Ti-0.32Y-0.11O (massfraction %) iron(-)base powder of 0.11% (massfraction), then soldering and sealing, the heat tracing of finishing the jacket powder according to the method and the step of example 1, smear Graphite Powder 99, the extrusion ratio that adopted then 9: 1 is pushed.After removing jacket, the density of material of acquisition is 7.77 * 10
3Kg/m
3, relative density reaches more than 99%.Through follow-up distortion and thermal treatment, obtain the iron-base superalloy that nanocluster is strengthened.
Embodiment 3: a kind of composition is the nanophase reinforced iron-base superalloy of Fe-14.5Cr-2.9W-0.45Ti-0.40Y-0.15 (massfraction %)
Selecting particle diameter for use is that≤200 μ m, averaged oxygen content are gas atomization Fe-14.5Cr-2.9W-0.45Ti-0.40Y-0.15O (massfraction %) iron(-)base powder of 0.2% (massfraction), then soldering and sealing, the heat tracing of finishing the jacket powder according to the method and the step of example 1, smear Graphite Powder 99, the extrusion ratio that adopted then 14: 1 is pushed.After removing jacket, the density of material of acquisition is 7.78 * 10
3Kg/m
3, relative density reaches more than 99%.Through follow-up distortion and thermal treatment, obtain the iron-base superalloy that nanocluster is strengthened.
Claims (7)
1. nanocluster reinforced iron-base superalloy, by mass percentage, form by following component:
Fe-(13～15)Cr-(2.5～3.5)W-(0.35～0.6)Ti-(0.2～0.6)Y-(0.05～0.20)O。
2. a kind of nanocluster reinforced iron-base superalloy according to claim 1, by mass percentage, form by following component:
Fe-(13～13.9)Cr-(2.6～2.9)W-(0.35～0.39)Ti-(0.2～0.4)Y-(0.08～0.15)O。
3. a kind of nanocluster reinforced iron-base superalloy according to claim 1, by mass percentage, form by following component:
Fe--(13～13.5)Cr--(2.5～2.8)W--(0.35～0.38)Ti--(0.3～0.5)Y--(0.10～0.13)O。
4. a kind of nanocluster reinforced iron-base superalloy according to claim 1, by mass percentage, form by following component:
Fe-13.8Cr-3.1W-0.42Ti-0.27Y-0.08O。
5. a kind of nanocluster reinforced iron-base superalloy according to claim 1, by mass percentage, form by following component:
Fe-13.9Cr-2.6W-0.38Ti-0.32Y-0.11O。
6. a kind of nanocluster reinforced iron-base superalloy according to claim 1, by mass percentage, form by following component:
Fe-14.5Cr-2.9W-0.45Ti-0.40Y-0.15O。
7. according to any described a kind of nanocluster reinforced iron-base superalloy of claim 1-7, it is characterized in that: described nanocluster reinforced iron-base superalloy adopts the gas atomization powder,, deformation processing hot-pressed through jacket and thermal treatment obtain the nanocluster strengthening phase that block materials and disperse distribute.
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| CN105154756A (en) * | 2015-10-16 | 2015-12-16 | 中南大学 | Method for preparing ODS (oxide dispersion strengthened) iron-based alloy through spark plasma sintering (SPS) |
| CN105238986A (en) * | 2014-07-11 | 2016-01-13 | 中国科学院金属研究所 | Method for preparing Cr-Y-O nanocluster oxide dispersion strengthening steel |
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| CN116240442A (en) * | 2023-02-28 | 2023-06-09 | 中南大学 | Low-activation high-strength multicomponent alloy and preparation method thereof |
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| CN105154756A (en) * | 2015-10-16 | 2015-12-16 | 中南大学 | Method for preparing ODS (oxide dispersion strengthened) iron-based alloy through spark plasma sintering (SPS) |
| CN105401047A (en) * | 2016-01-05 | 2016-03-16 | 西南大学 | Preparing method of ODS ferritic stainless steel |
| CN106756616A (en) * | 2016-12-02 | 2017-05-31 | 南京悠谷知识产权服务有限公司 | A kind of high temperature resistant aviation Nanoalloy and preparation method thereof |
| CN109175391A (en) * | 2018-10-24 | 2019-01-11 | 北京航空航天大学 | A kind of method of fabricated in situ nano-oxide particles strengthened dispersion alloy |
| CN109175391B (en) * | 2018-10-24 | 2020-12-15 | 北京航空航天大学 | Method for in-situ synthesis of nano-oxide particle dispersion strengthened alloy |
| CN113444962A (en) * | 2021-06-10 | 2021-09-28 | 湘潭大学 | Method for preparing multi-nano-phase reinforced iron-based alloy |
| CN116240442A (en) * | 2023-02-28 | 2023-06-09 | 中南大学 | Low-activation high-strength multicomponent alloy and preparation method thereof |
| CN116240442B (en) * | 2023-02-28 | 2023-10-27 | 中南大学 | Low-activation high-strength multicomponent alloy and preparation method thereof |
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Application publication date: 20110720 |