CN107142423A - A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys and preparation method thereof - Google Patents
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
The invention discloses a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys and preparation method thereof, the alloy is composed of the following components：Cr, Al, Mo, Nb, Si, Zr, Ta, Mn, La, C, N, O, Fe, impurity, wherein, the total weight percent content of Cr, Al and Si alloying element is 16.05%~20.2%, and the total weight percent content of Mo, Nb, Zr and Ta alloying element is 3.15%~5.65%.Alloy of the present invention by rationally controlling each component between ratio, the interaction between alloying element within this range, the high temperature oxidation resistance of FeCrAl based alloys can not only be ensured, the too high caused alloy hardening and brittle tendency of Cr, Al content can be avoided, while having higher elevated temperature strength and toughness concurrently.
Description
Technical field
The present invention relates to fe-based alloy structure material and specialty alloy materials technical field, and in particular to a kind of crash-proof core
Fuel assembly structure material FeCrAl based alloys and preparation method thereof.
Background technology
Fuel element is the core component of power producer reactor core, and its performance is directly connected to the peace of nuclear reactor operation
Full property and economy.Zircaloy is that current commercial nuclear power light water reactor fuel element uniquely uses cladding materials.But in emergency case
Under (such as Fukushima, Japan nuclear accident, presurized water reactor loss of-coolant accident (LOCA)), zirconium alloy cladding and high temperature coolant water vigorous reaction release big
Calorimetric and explosion gas hydrogen, cause cladding materials mechanical property to deteriorate, produce reactor hydrogen it is quick-fried with a large amount of radioactive products outside
The nuclear catastrophe consequence such as let out.In order to meet high temperature resistance steam oxidation ability, world nuclear big country is to many candidate's crash-proof bags
Shell material has carried out substantial amounts of HIGH TEMPERATURE OXIDATION PERFORMANCE, most represent include Zr-2, Zr-4, SiC, 304SS, 310SS,
The materials such as FeCrAl based alloys.Result of study shows：FeCrAl based alloys have good anti-radiation performance and good anti-height
Warm oxidability.
Commercialization FeCrAl base alloy materials have higher Cr, Al content (Cr mostly mostly at present：15~30%, A：6~
, therefore its high temperature oxidation resistance is more notable 15%).But because containing higher Cr, Al in commercialization FeCrAl base alloy materials
It is serious with brittle degree that content makes it be hardened under reactor operation operating mode heat aging and radiation parameter, is brought to reactor operation
Major safety risks, higher Cr, Al content FeCrAl based alloy room temperature mechanics plasticity it is poor.
The content of the invention
It is an object of the invention to provide a kind of new, with good combination property nuclear fuel assembly cladding materials
FeCrAl based alloys, the present invention is adjusted improvement by the component to existing FeCrAl based alloys so that FeCrAl based alloys
Not only there is good high temperature oxidation resistance, while having high high-temperature mechanics intensity and higher ductility and toughness at room temperature concurrently.
In addition, the present invention also provides the preparation method of above-mentioned FeCrAl based alloys.Prepared by the method for the invention
FeCrAl based alloys also have higher elevated temperature strength and thermal structure stability.
The present invention is achieved through the following technical solutions：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, it is composed of the following components：
Cr, Al, Mo, Nb, Si, Zr, Ta, Mn, La, C, N, O, Fe, impurity, wherein, the gross weight of Cr, Al and Si alloying element
It is 16.05%~20.2% to measure degree, and the total weight percent content of Mo, Nb, Zr and Ta alloying element is 3.15%
~5.65%.
In order to prevent the hardening of FeCrAl based alloys and the aggravation of brittle tendency, alloy is caused in reactor operation and processing system
It is broken during standby, it should ensureing FeCrAl based alloys with strict control on higher high temperature resistance steam oxidation capability foundation discussion simultaneously
Reduce Cr and Al content.In addition, containing appropriate Cr, the FeCrAl based alloys of Al content as reactor crash-proof fuel bag
Shell material is used in addition to meeting above-mentioned performance requirement, should also possess following performance：One is：Alloy has more high-strength at room temperature
Degree and plasticity, basis is provided for thin-walled involucrum tubular object extruding；Two are：The alloy that (is not less than 800 DEG C) at high temperature is with more high-strength
Degree；Three are：Alloy high-temp tissue is more stable, the recrystallization temperature of alloy is improved as far as possible so that alloy has more than 800 DEG C
There is stronger thermal structure stability and postpone alloy grain size and grow up, only stable tissue and the crystal grain of refinement can just be brought
The enough excellent properties of alloy.
Impurity content of the present invention meets the standard of current commercial industrial pure iron and ferritic stainless steel.
FeCrAl based alloys formula of the present invention is the improvement to existing FeCrAl based alloys, on the basis of existing components
On add Mo, Nb, Si, Zr, Ta, Mn, La, while to Cr, Al content is controlled, reduce Cr, Al content, to avoid
Alloy hardening and brittle tendency.
Applicant is had found by the experiment that studies for a long period of time：Cr, Al content are simply reduced on the basis of existing alloy, although
Alloy hardening and brittle tendency can be avoided, but the high temperature resistance steam oxidation ability of alloy is reduced, and elevated temperature strength and room temperature
Toughness is bad.By adding after Mo, Nb, Si, Zr, Ta, Mn, La components, even if Cr, Al content are reduced, it can also keep
Good high temperature resistance steam oxidation ability, moreover it is possible to avoid alloy hardening and brittle tendency, while with preferably high
Warm intensity and Toughness, generally, are added after certain component in the alloy, although intensity can increase, corresponding tough
Property have decline, the application passes through adds Mo, Nb, Si, Zr, Ta, Mn, La simultaneously, can have elevated temperature strength concurrently simultaneously and room temperature is tough
Property.
The Mo, Nb, Si, Zr, Ta, Mn, La specific addition are related to the concrete composition of FeCrAl based alloys, this Shen
Please by being 16.05%~20.2% by the total weight percent content of Cr, Al and Si alloying element, it can not only hold preferably
High temperature oxidation resistance, moreover it is possible to corrosion resistance, by the way that the total weight percent of Mo, Nb, Zr and Ta alloying element is contained
Measure as 3.15%~5.65%, so as to the Laves second phase particles of a large amount of disperses are separated out when preparing FeCrAl based alloys,
FeCrAl based alloy matrix grains are refined, the strong plasticity under Alloy At Room Temperature is significantly improved, alloy can also be significantly improved in high temperature
Under in recrystallization temperature and elevated temperature strength so that total structure stability at high temperature is obviously improved.
Alloy of the present invention by rationally controlling each component between ratio, between alloying element within this range
Interaction, the high temperature oxidation resistance of FeCrAl based alloys can not only be ensured, can avoid Cr, Al content are too high from causing
Alloy hardening and brittle tendency, while having higher elevated temperature strength and Toughness concurrently.It can be used as in power producer
The material of the core structure body such as can, screen work.
Further, Cr, the summation of Al content is 3~4 with the ratio of Mo, Nb, Zr and Ta content summation.
Under the ratio, FeCrAl bases have the combination properties such as preferable mechanics, high-temperature oxydation, are subsequent material processing preparation
Establish realisation basis.
Further, weight percentage, it is composed of the following components：
Cr：12.5~14.5%, Al：3.5~5.5%, Mo：2~3%, Nb：1~2%, Si：0.05~0.2%, Zr：
0.1~0.4%, Ta：0.05~0.25%, Mn：0~0.1%, La：0.05~0.1%, C：≤ 0.008%, N：≤
0.005%, O：≤ 0.003%, surplus is Fe and impurity.
Further, weight percentage, it is composed of the following components：
Cr：12.5~13%, Al：4.5~5.5%, Mo：2~3%, Nb：1~2%, Si：0.05~0.2%, Zr：0.1
~0.4%, Ta：0.05~0.25%, Mn：0~0.1%, La：0.05~0.1%, C：≤ 0.008%, N：≤ 0.005%, O：
≤ 0.003%, surplus is Fe and impurity.
Further, weight percentage, it is composed of the following components：
Cr：12.5~14.5%, Al：3.5~5.5%, Mo：2.5%, Nb：1.5%, Si：0.1~0.2%, Zr：0.2
~0.4%, Ta：0.15~0.25%, Mn：0.1%, La：0.05~0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤
0.003%, surplus is Fe and impurity.
Further, weight percentage, it is composed of the following components：
Cr：13%, Al：4.5%, Mo：2.5%, Nb：1.5%, Si：0.15%, Zr：0.3%, Ta：0.2%, Mn：
0.1%, La：0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤ 0.003%, surplus is Fe and impurity.
A kind of preparation method of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, it is characterised in that including with
Lower step：
1), the formula of FeCrAl based alloys is mixed in proportion, melting prepares ingot casting；
2), above-mentioned ingot casting carries out high temperature homogenizing annealing temperature, and annealing temperature is more than or equal to 1130 DEG C, and soaking time is more than
Equal to 3h；
3) surface scale of ingot casting after homogenizing annealing, is removed, high temperature forging is carried out after surface cleaning is handled, forging of beginning
Temperature：More than or equal to 1070 DEG C, final forging temperature：More than or equal to 830 DEG C, forging ratio is more than or equal to 1.9；
4) surface scale of sheet material after forging, is removed, the sheet material after surface cleaning is handled is heat-treated, be heat-treated
Process is：1~3h is handled at 750~800 DEG C；The hot rolling of laggard andante material is heat-treated, hot-rolled temperature is less than or equal to 840 DEG C, material
Expect that deflection is more than or equal to 53%；
5) sheet material after hot rolling, is subjected to heat aging processing, specific aging temp is：700 DEG C~800 DEG C, aging time
For：20h~100h；
6) hot rolled plate after, heat aging is handled carries out cold rolling, intermediate anneal temperature in cold-rolled process and most retreats
Fiery temperature is less than or equal to 735 DEG C, and cold rolling reduction is more than or equal to 42%.
In preparation method of the present invention, following two conditions are met, one is：Alloy hot-rolled temperature is not higher than 840 DEG C,
Deflection is not less than after 53%, and hot rolling that material needs can be cold rolling after 700 DEG C~800 DEG C timeliness 20h~100h；Two are：
Intermediate anneal temperature and final annealing temperature in alloy cold-rolled process are not higher than 735 DEG C and deflection is not less than 42%.
The interaction between alloying element in FeCrAl based alloys of the present invention, with reference to zerolling, long-time
The processing technology such as timeliness and heat treatment, generates extraordinary effect：Alloy of the present invention is through zerolling, long-time timeliness and warm
The phases of Laves second of small and dispersed distribution are obtained after handling process processing, significantly improving the mechanical property of alloy, (room temperature is strong
Toughness and elevated temperature strength) and alloy structure heat endurance.
The present invention compared with prior art, has the following advantages and advantages：
1st, the ratio between alloy of the present invention is by rationally controlling each component, alloying element within this range it
Between interaction, the high temperature oxidation resistance of FeCrAl based alloys can not only be ensured, can avoid Cr, Al content are too high from leading
The alloy hardening and brittle tendency caused, while having higher elevated temperature strength and toughness concurrently.
2nd, the processing technology such as alloy combination zerolling of the present invention, long-time timeliness and heat treatment, is obtained tiny
The phases of Laves second of Dispersed precipitate, significantly improve the mechanical property (room temperature obdurability and elevated temperature strength) and alloy group of alloy
The heat endurance knitted.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, to present invention work
Further to describe in detail, exemplary embodiment and its explanation of the invention is only used for explaining the present invention, is not intended as to this
The restriction of invention.
Embodiment 1：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：12.5, Al：3.5%, Mo：2%, Nb：1%, Si：0.05%, Zr：0.1%, Ta：0.05%, Mn：0%,
La：0.05%, C：0.008%, N：0.005%, O：0.003%, surplus be Fe and impurity, wherein, Cr, Al and Si alloying element
Total weight percent content be 16.05%, the total weight percent content of Mo, Nb, Zr and Ta alloying element is 3.15%, institute
Cr is stated, the summation of Al content is 5.08 with the ratio of Mo, Nb, Zr and Ta content summation.
Embodiment 2：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：14.5%, Al：5.5%, Mo：3%, Nb：2.0%, Si：0.2%, Zr：0.4%, Ta：0.25%, Mn：
0.1%, La：0.1%, C：0.008%, N：0.005%, O：0.003%, surplus be Fe and impurity, wherein, Cr, Al and Si close
The total weight percent content of gold element is 20.2%, and the total weight percent content of Mo, Nb, Zr and Ta alloying element is
5.65%, the Cr, the summation of Al content are 3.5 with the ratio of Mo, Nb, Zr and Ta content summation.
Embodiment 3：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：13%, Al：4.5%, Mo：3%, Nb：2%, Si：0.2%, Zr：0.4%, Ta：0.1%, Mn：0.1%,
La：0.1%, C：0.008%, N：0.005%, O：0.003%, surplus be Fe and impurity, wherein, Cr, Al and Si alloying element
Total weight percent content be 17.7%, the total weight percent content of Mo, Nb, Zr and Ta alloying element is 5.5%, described
Cr, the summation of Al content is 3.2 with the ratio of Mo, Nb, Zr and Ta content summation.
Embodiment 4：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：14.5%, Al：5.5%, Mo：2%, Nb：1.0%, Si：0.1%, Zr：0.1%, Ta：0.1%, Mn：
0.1%, La：0.1%, C：0.008%, N：0.005%, O：0.003%, surplus be Fe and impurity, wherein, Cr, Al and Si close
The total weight percent content of gold element is 20.1%, and the total weight percent content of Mo, Nb, Zr and Ta alloying element is
3.2%, the Cr, the summation of Al content are 6.25 with the ratio of Mo, Nb, Zr and Ta content summation.
Embodiment 5：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：13%, Al：5%, Mo：2.5%, Nb：1.5%, Si：0.15%, Zr：0.3%, Ta：0.2%, Mn：
0.1%, La：0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤ 0.003%, surplus be Fe and impurity, wherein, Cr, Al
And the total weight percent content of Si alloying elements is 17.65%, the total weight percent of Mo, Nb, Zr and Ta alloying element contains
Measure as 4.5%, the Cr, the summation of Al content is 3.9 with the ratio of Mo, Nb, Zr and Ta content summation.
The preparation method of embodiment 1 to embodiment 5 is as follows：
Comprise the following steps：
1), the high purity alloys for being more than 99.9% with ingot iron and purity press the formula dispensing of embodiment, use vacuum induction
Smelting furnace melting prepares 20~30 kilograms of ingot castings；
2), above-mentioned ingot casting carries out high temperature homogenizing annealing temperature, and annealing temperature is more than or equal to 1130 DEG C, and soaking time is more than
Equal to 3h；
3) surface scale of ingot casting after homogenizing annealing, is removed, high temperature forging is carried out after surface cleaning is handled, forging of beginning
Temperature：More than or equal to 1070 DEG C, final forging temperature：More than or equal to 830 DEG C, forging ratio is more than or equal to 1.9；
4) surface scale of sheet material after forging, is removed, the sheet material after surface cleaning is handled is heat-treated, be heat-treated
Process is：1~3h is handled at 750~800 DEG C；The hot rolling of laggard andante material is heat-treated, hot-rolled temperature is less than or equal to 840 DEG C, material
Expect that deflection is more than or equal to 53%；
5) sheet material after hot rolling, is subjected to heat aging processing, specific aging temp is：700 DEG C~800 DEG C, aging time
For：20h~100h；
6) hot rolled plate after, heat aging is handled carries out cold rolling, intermediate anneal temperature in cold-rolled process and most retreats
Fiery temperature is less than or equal to 735 DEG C, and cold rolling reduction is more than or equal to 42%.
Comparative example 1#：
A kind of FeCrAl based alloys, weight percentage is composed of the following components：
Cr：14.5%, Al：5.5%, C：0.008%, N：0.005%, O：0.003%, surplus is Fe and impurity.
Comparative example 1# and the difference of embodiment 2 are, without Mo：3%, Nb：2.0%, Si：0.2%, Zr：0.4%, Ta：
0.25%, Mn：0.1%, La：0.1%.
Comparative example 2#：
A kind of FeCrAl based alloys, weight percentage is composed of the following components：
Cr：14.5%, Al：5.5%, Mo：3%, Nb：2.0%, C：0.008%, N：0.005%, O：0.003%, surplus
For Fe and impurity.
Comparative example 2# and the difference of embodiment 2 are, without Si：0.2%, Zr：0.4%, Ta：0.25%, Mn：0.1%,
La：0.1%.
Comparative example 3#：
A kind of FeCrAl based alloys, weight percentage is composed of the following components：
Cr：14.5%, Al：5.5%, Si：0.2%, Zr：0.4%, Ta：0.25%, Mn：0.1%, La：0.1%, C：
0.008%, N：0.005%, O：0.003%, surplus is Fe and impurity.
Comparative example 3# and the difference of embodiment 2 are, without Mo：3%, Nb：2.0%.
Comparative example 4#：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：18%, Al：8%, Mo：3%, Nb：2.0%, Si：0.2%, Zr：0.4%, Ta：0.25%, Mn：0.1%,
La：0.1%, C：0.008%, N：0.005%, O：0.003%, surplus is Fe and impurity.
Comparative example 4# and the difference of embodiment 2 be, Cr：18%, Al：8%, i.e. Cr, Al content are higher than embodiment 2.
Comparative example 5#：
A kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, weight percentage, by following components
Composition：
Cr：8%, Al：2.5%, Mo：3%, Nb：2.0%, Si：0.2%, Zr：0.4%, Ta：0.25%, Mn：0.1%,
La：0.1%, C：0.008%, N：0.005%, O：0.003%, surplus is Fe and impurity.
Comparative example 5# and the difference of embodiment 2 be, Cr：8%, Al：2.5%, i.e. Cr, Al content are less than embodiment 2.
By embodiment 1 to embodiment 5, comparative example 1# to 5# carries out high temperature oxidation resistance test, elevated temperature strength test, room
Warm toughness test, test result is as shown in table 1, table 2：
The embodiment 1 of table 1 is to embodiment 5, comparative example 1# to 5# formula
Table 2 applies example 1 to embodiment 5, comparative example 1# to 5# Contrast on effect
From the experimental data of table 2：
Embodiment 1 to embodiment 5 is respectively provided with good high temperature oxidation resistance and heat endurance, while having preferable height concurrently
Warm intensity and Toughness.
Wherein, the effect of embodiment 2,4,5 is better than embodiment 1,3.
Contrasted from embodiment 1 to embodiment 5 and comparative example 1#-3#：Simple reduction Cr, Al content, not only anti-height
Warm oxidation susceptibility is reduced, and elevated temperature strength is also reduced.
Contrasted from embodiment 1 to embodiment 5 and comparative example 4#：When the content of trace element is constant, increase Cr, Al
Content, toughness can be caused to reduce.
Contrasted from embodiment 1 to embodiment 5 and comparative example 5#：When the content of trace element is constant, Cr, Al are reduced
Content, high temperature oxidation resistance can be caused to reduce.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (7)
1. a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys, it is characterised in that composed of the following components：
Cr, Al, Mo, Nb, Si, Zr, Ta, Mn, La, C, N, O, Fe, impurity, wherein, the gross weight hundred of Cr, Al and Si alloying element
Point be 16.05%~20.2% than content, the total weight percent content of Mo, Nb, Zr and Ta alloying element for 3.15%~
5.65%.
2. a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys according to claim 1, it is characterised in that
The Cr, the summation of Al content is 3~4 with the ratio of Mo, Nb, Zr and Ta content summation.
3. a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys according to claim 1 or 2, its feature exists
In weight percentage is composed of the following components：
Cr：12.5~14.5%, Al：3.5~5.5%, Mo：2~3%, Nb：1~2%, Si：0.05~0.2%, Zr：0.1~
0.4%, Ta：0.05~0.25%, Mn：0~0.1%, La：0.05~0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤
0.003%, surplus is Fe and impurity.
4. a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys according to claim 3, it is characterised in that
Weight percentage, it is composed of the following components：
Cr：12.5~13%, Al：4.5~5.5%, Mo：2~3%, Nb：1~2%, Si：0.05~0.2%, Zr：0.1~
0.4%, Ta：0.05~0.25%, Mn：0~0.1%, La：0.05~0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤
0.003%, surplus is Fe and impurity.
5. a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys according to claim 3, it is characterised in that
Weight percentage, it is composed of the following components：
Cr：12.5~14.5%, Al：3.5~5.5%, Mo：2.5%, Nb：1.5%, Si：0.1~0.2%, Zr：0.2~
0.4%, Ta：0.15~0.25%, Mn：0.1%, La：0.05~0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤
0.003%, surplus is Fe and impurity.
6. a kind of crash-proof nuclear fuel assembly structural material FeCrAl based alloys according to claim 3, it is characterised in that
Weight percentage, it is composed of the following components：
Cr：13%, Al：4.5%, Mo：2.5%, Nb：1.5%, Si：0.15%, Zr：0.3%, Ta：0.2%, Mn：0.1%,
La：0.1%, C：≤ 0.008%, N：≤ 0.005%, O：≤ 0.003%, surplus is Fe and impurity.
7. a kind of preparation method of the nuclear fuel assembly cladding materials FeCrAl based alloys as described in any one of claim 1 to 6, its
It is characterised by, comprises the following steps：
1), the formula of FeCrAl based alloys is mixed in proportion, melting prepares ingot casting；
2), above-mentioned ingot casting carries out high temperature homogenizing annealing temperature, and annealing temperature is more than or equal to 1130 DEG C, and soaking time is more than or equal to
3h；
3) surface scale of ingot casting after homogenizing annealing, is removed, high temperature forging is carried out after surface cleaning is handled, begin forging temperature
Degree：More than or equal to 1070 DEG C, final forging temperature：More than or equal to 830 DEG C, forging ratio is more than or equal to 1.9；
4) surface scale of sheet material after forging, is removed, the sheet material after surface cleaning is handled is heat-treated, heat treatment process
For：1~3h is handled at 750~800 DEG C；The hot rolling of laggard andante material is heat-treated, hot-rolled temperature is less than or equal to 840 DEG C, and material becomes
Shape amount is more than or equal to 53%；
5) sheet material after hot rolling, is subjected to heat aging processing, specific aging temp is：700 DEG C~800 DEG C, aging time is：
20h~100h；
6) hot rolled plate after, heat aging is handled carries out cold rolling, intermediate anneal temperature and last annealing temperature in cold-rolled process
Degree is less than or equal to 735 DEG C, and cold rolling reduction is more than or equal to 42%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811116A (en) * | 2019-02-21 | 2019-05-28 | 中国核动力研究设计院 | A kind of preparation method of crash-proof involucrum FeCrAl based alloy nanocrystalline material |
| CN111826590A (en) * | 2020-06-08 | 2020-10-27 | 东莞材料基因高等理工研究院 | Fe23Zr6And Fe2M-Laves phase co-reinforced FeCrAl stainless steel and preparation method thereof |
Citations (1)
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| CN106381448A (en) * | 2016-10-12 | 2017-02-08 | 苏州热工研究院有限公司 | FeCrAl alloy material for nuclear reactor fuel cladding material |
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| CN106381448A (en) * | 2016-10-12 | 2017-02-08 | 苏州热工研究院有限公司 | FeCrAl alloy material for nuclear reactor fuel cladding material |
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| JUN LIM等: "Design of alumina forming FeCrAl steels for lead or lead-bismuth", 《JOURNAL OF NUCLEAR MATERIALS 》 * |
| Y. YAMAMOTO等: "Development and property evaluation of nuclear grade wrought FeCrAl fuel cladding for light water reactors", 《JOURNAL OF NUCLEAR MATERIALS》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811116A (en) * | 2019-02-21 | 2019-05-28 | 中国核动力研究设计院 | A kind of preparation method of crash-proof involucrum FeCrAl based alloy nanocrystalline material |
| CN109811116B (en) * | 2019-02-21 | 2020-06-09 | 中国核动力研究设计院 | Preparation method of accident-resistant FeCrAl-based alloy nanocrystalline material for cladding |
| CN111826590A (en) * | 2020-06-08 | 2020-10-27 | 东莞材料基因高等理工研究院 | Fe23Zr6And Fe2M-Laves phase co-reinforced FeCrAl stainless steel and preparation method thereof |
| CN111826590B (en) * | 2020-06-08 | 2022-07-08 | 东莞材料基因高等理工研究院 | Fe23Zr6And Fe2M-Laves phase co-reinforced FeCrAl stainless steel and preparation method thereof |
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