CN106222577A - Stainless steel alloy and preparation method thereof, the stainless steel cladding of fuel assembly - Google Patents
Stainless steel alloy and preparation method thereof, the stainless steel cladding of fuel assembly Download PDFInfo
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- CN106222577A CN106222577A CN201610723462.5A CN201610723462A CN106222577A CN 106222577 A CN106222577 A CN 106222577A CN 201610723462 A CN201610723462 A CN 201610723462A CN 106222577 A CN106222577 A CN 106222577A
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/18—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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- 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
- C22C38/18—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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Abstract
The invention discloses the stainless steel cladding of a kind of stainless steel alloy and preparation method thereof, fuel assembly, stainless steel alloy includes the composition of following mass percent: chromium 8%～18%, aluminum 4%～8%, niobium 0.1%～1%, molybdenum 0.1%～4%, titanium 0.1%～2%, silicon 0.01%～2%, zirconium 0.1%～2%, tungsten 0.05%～2%, yttrium 0.005%～1%, surplus is Fe.The present invention, by the synergism of the trace element such as Cr, Nb, Mo, reduces Cr content, it is suppressed that the generation of brittlement phase, improves the machining property of stainless steel alloy, improve the decay resistance of stainless steel alloy, mechanical behavior under high temperature and elongation percentage；By the content of wherein impurity component carbon, nitrogen is limited, improve the effective Cr content in solid solution, and the carbide formed and nitride contribute to crystal grain refinement, improve intensity and the plasticity of the tubing prepared.
Description
Technical field
The present invention relates to reactor nuclear fuel assembly technical field, particularly relate to a kind of rustless steel being applicable to fuel assembly
Alloy and preparation method thereof, the stainless steel cladding of fuel assembly.
Background technology
Reactor nuclear fuel assembly is the critical component of reactor core, including guide pipe, the involucrum of fuel rod, upper end
Plug, lower end plug, assemble the inside and outside band etc. of screen work, and major function is that protection fuel pellet is not corroded by coolant, releases energy
And shielding hot material leaks.In running, nuclear fuel assembly is subjected to the highest external and internal pressure, high temperature, fuel
Swelling, suction hydrogen embrittlement etc. threaten, and bear the strongest water conservancy vibrating machine stress simultaneously, and are resistant to intense neutron flux and strong gamma-rays
Irradiation.Therefore, nuclear fuel assembly need to meet many performance requirements such as metallurgy, heat transfer, machinery, such as:
(1) little neutron absorption cross-section, good irradiation stability；
(2) enough room temperature mechanical intensity, high temperature mechanical strength, can keep overall dimensions stable；
(3), there is not harmful chemical reaction with coolant, fission product and nuclear fuel, it is possible to long in corrosion resistance and good
Phase contains radioactive substance；
(4) there is good thermohydraulics and heat exchange characteristics.
In Fukushima, Japan Nuclear Power Accident in 2011, the zirconium alloy cladding material of fuel element steams with water under the high temperature conditions
Solid/liquid/gas reactions loses due intensity and explodes, and causes radioelement to reveal, causes serious nuclear pollution accident.For combustion
Material element zirconium alloy cladding material problem of crash-proof ability under losing cold working condition, various countries propose the high property of Development of Novel
Energy crash-proof material, it is desirable to the resistance to oxidation speed of new material is lower, reduces and reacts generation hydrogen under hot conditions with steam.Phase
Than in zircaloy, FeCrAl stainless steel material corrosion resistance and good, yield strength are high, good heat conductivity, low cost, are to develop height
The important candidate material of a new generation's cladding materials.The room temperature that can be improved matrix by interpolation Cr element in iron is corrosion-resistant
Performance, adds Al element and can improve the high temperature oxidation resistance of matrix material.But, it is special to there is three below in FeCrAl rustless steel
Property:
(1) 475 DEG C of fragility.Cr content is higher than the inherent character of 15% ferritic stainless steel.
(2) σ phase fragility.For middle and high Cr ferritic stainless steel, it is easily formed σ phase 600～980 DEG C of scope heating, causes
Become fragile and reduce its corrosion resistance.
(3) high-temperature brittleness.During more than the 950 DEG C heating of high Cr ferritic stainless steel, steel is often made to become fragile also in cooling procedure
It is deteriorated along with corrosion resistance, affects stainless welding performance and hot-working character.
For service condition and the stainless characteristic of FeCrAl of cladding materials, need a kind of new ferrite stainless of invention badly
Steel material, improve material mechanical process capacity, improve rustless steel under arms under the conditions of comprehensive mechanical property and corrosion resistance
Energy.
Summary of the invention
The technical problem to be solved in the present invention is, it is provided that a kind of generation suppressing brittlement phase, improves machining property,
Improve decay resistance and the stainless steel alloy of mechanical behavior under high temperature and use the rustless steel of fuel assembly of this stainless steel alloy
Involucrum.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of stainless steel alloy, including following matter
Amount percentage ratio composition: chromium 8%～18%, aluminum 4%～8%, niobium 0.1%～1%, molybdenum 0.1%～4%, titanium 0.1%～2%,
Silicon 0.01%～2%, zirconium 0.1%～2%, tungsten 0.05%～2%, yttrium 0.005%～1%, surplus is Fe.
Preferably, described stainless steel alloy also includes impurity；In described impurity, mass percent ＜ 0.03% of carbon, nitrogen
Mass percent ＜ 0.03%.
Preferably, the mass percent summation of described titanium and niobium is 0.2%～1.1%.
Preferably, described stainless steel alloy includes the composition of following mass percent: chromium 10%～15%, aluminum 4%～
6%, niobium 0.1%～1%, molybdenum 0.1%～2%, titanium 0.1%～1%, silicon 0.01%～1%, zirconium 0.1%～1%, tungsten
0.05%～1%, yttrium 0.005%～0.5%, surplus is Fe.
The present invention also provides for the preparation method of the stainless steel alloy described in more than one any one, comprises the following steps:
Each component materials is carried out melting by the mass percent according to each composition, prepares melting liquid；
Casting, prepares stainless steel alloy.
Preferably, the temperature of described casting is 1550 DEG C～1650 DEG C.
The present invention also provides for the preparation method of another kind of stainless steel alloy described in any of the above item, comprises the following steps:
Previously prepared Al-Y intermediate alloy, wherein the mass percent of yttrium is 20%；
Other each component materials is carried out melting by mass percentage, prepares melting liquid；
Described Al-Y intermediate alloy is added in described melting liquid, casting, prepare stainless steel alloy.
Preferably, the temperature of described casting is 1550 DEG C～1650 DEG C.
The present invention also provides for the stainless steel cladding of a kind of fuel assembly, uses the stainless steel alloy system described in any of the above item
Become.
Preferably, a diameter of 9mm of described stainless steel cladding, wall thickness is 0.3mm～0.5mm.
Beneficial effects of the present invention: by the synergism of the trace element such as Cr, Nb, Mo, reduces Cr content, it is suppressed that crisp
The generation of property phase, improves the machining property of stainless steel alloy, improves the decay resistance of stainless steel alloy, high temperature power
Learn performance and elongation percentage；By limiting the content of wherein impurity component carbon, nitrogen, the effective Cr that improve in solid solution contains
Amount, and the carbide formed and nitride contribute to crystal grain refinement, improve intensity and the plasticity of the tubing prepared.
The stainless steel cladding prepared by this stainless steel alloy, improves the fuel assembly resistance to thing under dehydration cooling condition
Therefore ability.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the prepared stainless steel alloy of embodiment 2 strain stress relation figure at different temperatures in the present invention；
Fig. 2 is temperature and the graph of relation of yield strength of the stainless steel alloy that embodiment 2 prepares in the present invention；
Fig. 3 is the corrosive nature test figure of the stainless steel alloy that embodiments of the invention 1-3 prepares.
Detailed description of the invention
The stainless steel alloy of one embodiment of the invention, it is possible to claim FeCrAl stainless steel alloy, this stainless steel alloy include with
The composition of lower mass percent: chromium (Cr) 8%～18%, aluminum (Al) 4%～8%, niobium (Nb) 0.1%～1%, molybdenum (Mo)
0.1%～4%, titanium (Ti) 0.1%～2%, silicon (Si) 0.01%～2%, zirconium (Zr) 0.1%～2%, tungsten (W) 0.05%～
2%, yttrium (Y) 0.005%～1%, surplus is Fe.
The most also include inevitable impurity.In impurity, mass percent ＜ 0.03% of carbon (C), the quality of nitrogen (N)
Percentage ratio ＜ 0.03%.
Further, the mass percent summation of this stainless steel alloy titanium and niobium is 0.2%～1.1%.
Preferably, this stainless steel alloy includes the composition of following mass percent: chromium 10%～15%, aluminum 4%～6%,
Niobium 0.1%～1%, molybdenum 0.1%～2%, titanium 0.1%～1%, silicon 0.01%～1%, zirconium 0.1%～1%, tungsten 0.05%～
1%, yttrium 0.005%～0.5%, surplus is Fe.
In this stainless steel alloy, add Y element and can purify molten steel, eliminate gas, improve the form of field trash, size, divide
Cloth, plays intercrystalline strengthening effect, improves thermoplasticity and the hot-workability of steel, reduces the generation of micro-crack defect in course of hot rolling；
Energy crystal grain thinning, improves crystal boundary bond strength；The oxide film of densification can be quickly formed on surface, improve the anti-corruption of matrix
Erosion property and heat-resisting quantity.Solid solution or the Dispersed precipitate Y element in matrix can improve matrix strength, and suppression carbonized thing is at crystalline substance
Boundary separates out, and improves mechanical property and the corrosion resistance of matrix.
The interpolation of molybdenum, it is possible to improve the decay resistance of ferritic stainless steel.
Silicon, can cleaning molten steel mainly as reducing agent and deoxidizer.Silicon and chromium, aluminum share and can significantly improve the high temperature of steel and resist
Oxidation susceptibility.Additionally, silicon is ferrite former.
Titanium is stabilizing element, can crystal grain thinning, make the interior tissue more dense uniform of steel, improve stainless mechanical property
Energy and welding performance.
Niobium is stabilizing element, can crystal grain thinning.The addition resistance to spot corrosion of useful ferritic stainless steel of niobium and intercrystalline corrosion
Performance.Niobium and titanium form the compound of inhibiting grain growth with the carbon in matrix, nitrogen element, reduce carbide and the nitridation of chromium
The precipitation of thing, thus improve the intergranular corrosion resistance performance of matrix, improve stainless processability.
Zirconium can improve stainless mechanical behavior under high temperature, improves the decay resistance of alloy.Tungsten improves stainless high temperature
Mechanical property.
To sum up, compared to the FeCrAl stainless steel material of prior art, the stainless steel alloy of the present invention reduces chromium
(Cr) content, adds the content of aluminum, and adds the element such as Mo, Zr improving oxidation-resistance property.Use relatively
The Cr element of lower content can effectively avoid Cr element to cause the generation of high-temperature brittleness phase, improves FeCrAl stainless steel alloy
Rolling performance；Increase Al constituent content and improve the high-temperature oxidation resistance of matrix；By elements such as rational Y, Mo, Si, Ti, Nb
Interpolation can improve the high-temperature corrosion resistance performance of matrix and improve the mechanical behavior under high temperature of matrix, solves corrosion resistant performance and base plastic
The afoul problem of performance.
The preparation method of first embodiment of the stainless steel alloy of the present invention, it may include following steps:
Each component materials is carried out melting by S1, mass percent according to each composition, prepares melting liquid.
Wherein, melting vacuum available induction furnace, non-vacuum induction furnace, resistance furnace, electric arc furnace+external refining etc. any one
Realize.The commercially available acquisition of each component materials.
S2, casting, prepare stainless steel alloy.The temperature of casting is 1550 DEG C～1650 DEG C.
In this first embodiment, each composition adds with simple substance form, sequentially passes through melting, casting, prepares stainless steel alloy.
The preparation method of second embodiment of the stainless steel alloy of the present invention, it may include following steps:
S1, previously prepared Al-Y intermediate alloy, wherein the mass percent of yttrium is 20%.
Wherein, first aluminum and yttrium are carried out melting, form Al-Y intermediate alloy.
S2, other each component materials is carried out melting by mass percentage, prepare melting liquid；The temperature of casting is 1550 DEG C
～1650 DEG C.
Other each composition in addition to aluminum and yttrium carries out melting with simple substance form addition.
S3, Al-Y intermediate alloy is added in melting liquid, casting, prepare stainless steel alloy.
It addition, in above-mentioned stainless steel alloy preparation method, in conjunction with the comprehensive dispensing of composition of raw material, according to close, real, suitable
Charging principle be sequentially loaded into furnace chamber carry out melting, slag making, pre-deoxidation, alloying, composition adjustment, casting.
The stainless steel cladding of the fuel assembly of the present invention, uses above-mentioned stainless steel alloy to make.
Further, a diameter of 9mm of stainless steel cladding, wall thickness is 0.3mm～0.5mm.
Time prepared by this stainless steel cladding, by 1200 DEG C of homogenizing annealings of stainless steel alloy ingot casting, through 800～1200 DEG C of forgings
Being processed into bar, then perforation, 800～1050 DEG C of heat bundle, cold bundle, the intermediate annealing of multi-pass, finally carrying out at 700 DEG C should
Power annealing prepares the FeCrAl stainless steel alloy tubing of corresponding composition, cuts acquisition stainless steel cladding according to Len req demand.
Below by way of specific embodiment, the invention will be further described.
Embodiment 1
Using vacuum melting technique, previously prepared Al-Y intermediate alloy, the wherein weight percentage 20% of yttrium, in employing
Between alloy secondary batching mode, through metering, dispensing, melting, cast molding, prepare FeCrAl ferritic stainless steel alloy.Wherein,
The mass percent (wt%) of each composition is as follows: Cr 10%, Al 6%, Nb 0.6%, Mo 3%, Ti 0.3%, Si
0.5%, Zr 0.5%, W 0.5%, Y 0.3%, surplus is Fe.
This stainless steel alloy yield strength at ambient temperature prepared is more than 500MPa more than 450MPa, hot strength,
Fracture elongation is more than 25%；At 300 DEG C, yield strength is more than 250MPa, and hot strength is more than 400MPa.Alloy cast ingot 1200
DEG C homogenizing annealing, is processed into bar through 800～1200 DEG C of forgings, and then perforation, 800～1050 DEG C of heat of multi-pass prick, cold
Bundle, intermediate annealing, finally carry out stress relief annealing at 700 DEG C and prepare the FeCrAl stainless steel alloy tubing of corresponding composition.
Embodiment 2
Using vacuum melting technique, previously prepared Al-Y intermediate alloy, the wherein weight percentage 20% of yttrium, in employing
Between alloy secondary batching mode, through metering, dispensing, melting, cast molding, prepare FeCrAl ferritic stainless steel alloy.
Wherein, the mass percent (wt%) of each composition is as follows: Cr 13%, Al 5%, Nb 0.4%, Mo 1%, Ti
0.2%, Si 0.5%, Zr 0.5%, W 0.5%, Y 0.3%, surplus is Fe.
This stainless steel alloy yield strength at ambient temperature prepared is more than 500MPa more than 450MPa, hot strength,
Fracture elongation is more than 25%；At 300 DEG C, yield strength is more than 250MPa, and hot strength is more than 400MPa.Alloy cast ingot 1200
DEG C homogenizing annealing, is processed into bar through 800～1200 DEG C of forgings, and then perforation, 800～1050 DEG C of heat of multi-pass prick, cold
Bundle, intermediate annealing, finally carry out stress relief annealing at 700 DEG C and prepare the FeCrAl stainless steel alloy tubing of corresponding composition.
Embodiment 3
Using vacuum melting technique, previously prepared Al-Y intermediate alloy, the wherein weight percentage 20% of yttrium, in employing
Between alloy secondary batching mode, through metering, dispensing, melting, cast molding, prepare FeCrAl ferritic stainless steel alloy material
Material.
Wherein, the mass percent (wt%) of each composition is as follows: Cr 15%, Al 4%, Nb 0.6%, Mo 2%, Ti
0.3%, Si 0.5%, Zr 1%, W 0.25%, Y 0.3%, surplus is Fe.
This stainless steel alloy yield strength at ambient temperature prepared is more than 500MPa more than 450MPa, hot strength,
Fracture elongation is more than 25%；At 300 DEG C, yield strength is more than 250MPa, and hot strength is more than 400MPa.Alloy cast ingot 1200
DEG C homogenizing annealing, is processed into bar through 800～1200 DEG C of forgings, and then perforation, 800～1050 DEG C of heat of multi-pass prick, cold
Bundle, intermediate annealing, finally carry out stress relief annealing at 700 DEG C and prepare the FeCrAl stainless steel alloy tubing of corresponding composition.
The performance that the stainless steel alloy tubing that embodiment 1-3 prepares records and U.S.'s oak forest laboratory in prior art
Like product (comparative example) performance comparison of (Oak Ridge National Laboratory), as shown in table 1.
Table 1.FeCrAl (little crystal grain+10% is cold rolling) embodiment 1-3 and the performance comparison of comparative example
Knowable to table 1 data, the tensile strength of the stainless steel alloy tubing that embodiments of the invention 1-3 prepares is high, hence it is evident that
Like product higher than U.S.'s oak forest laboratory.
Carrying out Mechanics Performance Testing as a example by the FeCrAl stainless steel alloy that embodiment 2 prepares, result is as shown in Figure 1, 2.
In Fig. 1, curve a, b, c, d are respectively performance curve when 25 DEG C, 200 DEG C, 500 DEG C and 800 DEG C.
Can be seen that from Fig. 1,2, the mechanical behavior under high temperature of the FeCrAl stainless steel alloy of the present invention is good, its croop property and
Elevated temperature strength is high.Alloying element owing to adding suppresses the chromium in matrix to form carbon, nitride brittlement phase, therefore in Fig. 1
FeCrAl stainless steel alloy does not cause the phenomenon of the moulding reduction of matrix at about 475 DEG C because of generation brittlement phase, and 800
DEG C time stainless steel alloy creep strength the highest.
In the stainless steel alloy of the present invention, the alloying element owing to adding is solid-solution in matrix or precipitation precipitation is formed new
Compound, these compounds improve the mechanical behavior under high temperature of matrix, as shown in Figure 2.FeCrAl stainless steel alloy is before 600 DEG C
Intensity reduces slowly, and when 800 DEG C, the intensity of matrix is still above 100Mpa.
With reference to ASTM B 811-2013 " nuclear reactor fuel can forging zircaloy seamless pipe " and ASTM G2/G2M-
2006 " Zr, Hf and alloy corrosion tests in 360 DEG C of water and 400 DEG C of steam thereof ", are carried out the most not in autoclave
Test with the novel coating molybdenum alloy material decay resistance of corrosive medium.
As it is shown on figure 3, under the conditions of 360 DEG C/18.6Mpa, pure water, assay shows, utilize the rustless steel of the present invention
The corrosive nature of alloy is better than current in-service zircaloy.As it is shown on figure 3, its middle column body 1,2,3 represents embodiment 1-3 system respectively
The stainless steel alloy tubing obtained, the stainless steel alloy tubing surrosion of 200 days of embodiment 1-3 is few as seen from the figure, is respectively
About the 50% of the low stannum Zr-4 compo pipe that figure middle column body 4 represents.Therefore, the FeCrAl stainless steel alloy tubing ratio of the present invention is low
The corrosion resistance of stannum Zr-4 compo pipe is more preferable.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or are directly or indirectly used in other relevant skills
Art field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (10)
1. a stainless steel alloy, it is characterised in that include the composition of following mass percent: chromium 8%～18%, aluminum 4%～8%,
Niobium 0.1%～1%, molybdenum 0.1%～4%, titanium 0.1%～2%, silicon 0.01%～2%, zirconium 0.1%～2%, tungsten 0.05%～2%, yttrium
0.005%～1%, surplus is Fe.
Stainless steel alloy the most according to claim 1, it is characterised in that described stainless steel alloy also includes impurity；Described
In impurity, mass percent ＜ 0.03% of carbon, mass percent ＜ 0.03% of nitrogen.
Stainless steel alloy the most according to claim 1, it is characterised in that the mass percent summation of described titanium and niobium is
0.2%～1.1%.
4. according to the stainless steel alloy described in any one of claim 1-3, it is characterised in that described stainless steel alloy includes following
The composition of mass percent: chromium 10%～15%, aluminum 4%～6%, niobium 0.1%～1%, molybdenum 0.1%～2%, titanium 0.1%～1%, silicon
0.01%～1%, zirconium 0.1%～1%, tungsten 0.05%～1%, yttrium 0.005%～0.5%, surplus is Fe.
5. the preparation method of the stainless steel alloy described in an any one of claim 1-4, it is characterised in that include following step
Rapid:
Each component materials is carried out melting by the mass percent according to each composition, prepares melting liquid；
Casting, prepares stainless steel alloy.
The preparation method of stainless steel alloy the most according to claim 5, it is characterised in that the temperature of described casting is 1550
DEG C～1650 DEG C.
7. the preparation method of the stainless steel alloy described in an any one of claim 1-4, it is characterised in that include following step
Rapid:
Previously prepared Al-Y intermediate alloy, wherein the mass percent of yttrium is 20%；
Other each component materials is carried out melting by mass percentage, prepares melting liquid；
Described Al-Y intermediate alloy is added in described melting liquid, casting, prepare stainless steel alloy.
The preparation method of stainless steel alloy the most according to claim 7, it is characterised in that the temperature of described casting is 1550
DEG C～1650 DEG C.
9. the stainless steel cladding of a fuel assembly, it is characterised in that use the rustless steel described in any one of claim 1-4 to close
Gold is made.
The stainless steel cladding of fuel assembly the most according to claim 9, it is characterised in that described stainless steel cladding straight
Footpath is 9mm, and wall thickness is 0.3 mm～0.5mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165717A (en) * | 2017-12-05 | 2018-06-15 | 中国科学院金属研究所 | A kind of preparation process of nuclear fuel element FeCrAl tubing |
| CN115896620A (en) * | 2022-11-15 | 2023-04-04 | 中国核动力研究设计院 | Corrosion-resistant FeCrAl cladding and preparation method thereof |
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| CN1918314A (en) * | 2004-02-23 | 2007-02-21 | 山特维克知识产权股份有限公司 | Cr-al-steel for high-temperature applications |
| CN103842537A (en) * | 2011-06-21 | 2014-06-04 | 奥托昆普德国联合金属制造有限公司 | Heat-resistant iron-chromium-aluminium alloy with low chromium vaporization rate and elevated thermal stability |
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2016
- 2016-08-25 CN CN201610723462.5A patent/CN106222577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122841A (en) * | 1994-11-11 | 1996-05-22 | 冶金工业部包头稀土研究院 | Non-brittle Cr-Al-rare earth metal-Fe alloy |
| CN1918314A (en) * | 2004-02-23 | 2007-02-21 | 山特维克知识产权股份有限公司 | Cr-al-steel for high-temperature applications |
| CN103842537A (en) * | 2011-06-21 | 2014-06-04 | 奥托昆普德国联合金属制造有限公司 | Heat-resistant iron-chromium-aluminium alloy with low chromium vaporization rate and elevated thermal stability |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165717A (en) * | 2017-12-05 | 2018-06-15 | 中国科学院金属研究所 | A kind of preparation process of nuclear fuel element FeCrAl tubing |
| CN115896620A (en) * | 2022-11-15 | 2023-04-04 | 中国核动力研究设计院 | Corrosion-resistant FeCrAl cladding and preparation method thereof |
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