CN109898028A - Austenite heat-resistance stainless steel of resistance to high temperature oxidation and preparation method thereof and purposes - Google Patents
Austenite heat-resistance stainless steel of resistance to high temperature oxidation and preparation method thereof and purposes Download PDFInfo
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Abstract
The present invention provides a kind of austenite heat-resistance stainless steels of resistance to high temperature oxidation, by weight percentage include: C 0.04-0.1%, Cr 14-17%, Ni 20-27%, Al 2-4%, Nb 0.2-2.5%, W 0.5-5%, Cu 1.5-4%, Mn 0.5-1%, S < 0.005%, P < 0.02%, the Fe of N < 0.02% and surplus.The present invention also provides the preparation methods of austenite heat-resistance stainless steel, comprising: and (1) slab is heated and kept the temperature, is forged into square billet, it is then air-cooled；(2) oxide skin for removing square billet surface, heats and keeps the temperature, subsequent hot.The austenite heat-resistance stainless steel of resistance to high temperature oxidation of the invention has excellent high temperature tensile properties, durable creeping performance and anti-steam corrosion performance, can satisfy the manufacture requirement of ultra supercritical unit.
Description
Technical field
The invention belongs to field of metallurgy, in particular it relates to a kind of austenite heat-resistance stainless steel of resistance to high temperature oxidation
And preparation method thereof and purposes.
Background technique
The energy resource structure in China based on thermal power generation, realizes that generation mode changes to high parameter, large sized unit for a long time
It is one of the important measures for improving generating efficiency and improving environmental pollution.Elevated steam conditions propose heat proof material performance higher
It more fully requires, comprising: enough creep rupture strengths and creep rupture strength, excellent antifatigue and heat transfer property, higher
Anti-oxidant and corrosion resistance, good tissue long-time stability.Currently, ultra supercritical apparatus of thermo-electric power boiler key position is with material master
It to be austenitic heat-resistance steel, such as: S31042 (HR3C), S30432 (SUPER304H) and TP347HFG, however the high Cr of tradition is difficult to understand
Family name's body heat resisting steel is formed by Cr in steam ambient of the temperature higher than 650 DEG C2O3It is easy with CrO2(OH)2Form volatilization,
Oxidation film stripping is caused, the safety for seriously threatening boiler is on active service.Therefore, in order to cooperate 700 DEG C of ultra supercritical power generation machines of new generation
The development of group, low cost, the high-property heat resistant steel for researching and developing higher service temperature are extremely urgent.
2007, a kind of surface of U.S. Oak Ridge National Laboratory M.P.Brady et al. first discovery formd Al2O3
Novel (the Alumina-Forming of austenitic heat-resistance steel containing aluminium of nanoscale NbC hardening constituent is precipitated in protective layer and matrix
Austenitic Stainless Steel, hereinafter referred to as AFA steel), there is the high temperature more more excellent than tradition heat resisting steel containing Cr
Oxidation resistance and excellent high temperature creep property are expected to become the high temperature resistant suitable for 700 DEG C of grade extra-supercritical units
Material.According to Ni content, it is broadly divided into three classes: 1. low Ni content, 12wt.%；2. middle Ni content, 20-25wt.%；3. high
Ni content, 32wt.%.
Foreign countries have carried out a large amount of research work, such as M.P.Brady to the research and development of the novel austenitic heat-resistance steel containing aluminium
People has developed Fe- (20-25) Ni- (14-15) Cr- (2.5-3.5) Al- (1-3) Nb wt.% (750-800 DEG C of formation
Al2O3Layer) and Fe-12Ni-14Cr-2.5Al-0.6Nb-5Mn-3Cu wt.% type (650 DEG C of formation Al2O3Layer) AFA steel.When
Before, the research about AFA steel is still less, University of Science & Technology, Beijing Lyu Zhaoping team application No. is 201010232851.0 patents
Application discloses one kind and spontaneously forms Al2O3The austenite heat-resistance stainless steel of protective layer.The steel can spontaneously form Al2O3Protection
Layer, and there is excellent mechanical behavior under high temperature.Nippon Zhu Jin Co., Ltd. application No. is 2017800005402.2
Patent application discloses a kind of Austenitic heat-resistant alloy and its manufacturing method.It is obtained by organizational controls even if in high temperature ring
Also with the austenitic alloy of high creep strength under border, solves after their original designs are mutually strengthened using laves phase with γ ' and deposit
The situation that creep strength and toughness reduce after long-time timeliness.Jiangsu Wujin Stainless Steel Co., Ltd. application No. is
201310667633.3 patent application discloses a kind of Novel austenitic heat-resistance steel, provides one kind and has at a temperature of 700 DEG C
There is good anti-steam oxidation ability, (isothermal method was lasting up to 100,000 hours for high-temperature and durable rupture time at load stress 100MPa
Curvilinear regression extrapolation) austenitic heat-resistance steel.
Strengthened however, above-mentioned patent application only relies on Second Phase Precipitation carbide, high-temperature creep resistance and height
Warm antioxygenic property is not satisfactory.
Summary of the invention
Goal of the invention of the invention is in view of the deficiencies in the prior art, to provide a kind of austenite of resistance to high temperature oxidation
Heat-resistance stainless steel and preparation method thereof and purposes.
The present invention realizes object above by following technological means.
A kind of austenite heat-resistance stainless steel of resistance to high temperature oxidation, which is characterized in that by weight percentage include: C0.04-
0.1%, Cr 14-17%, Ni 20-27%, Al 2-4%, Nb 0.2-2.5%, W 0.5-5%, Cu 1.5-4%, Mn
0.5-1%, S < 0.005%, P < 0.02%, the Fe of N < 0.02% and surplus.
According to application demand, Si 0-0.5% and B 0-0.1% can also be added on the basis of above-mentioned formula.
The preparation method of the austenite heat-resistance stainless steel of the resistance to high temperature oxidation, comprising the following steps:
(1) slab is heated and is kept the temperature, be forged into square billet, it is then air-cooled；
(2) oxide skin for removing square billet surface, heats and keeps the temperature, subsequent hot.
In above-mentioned steps (1), heating temperature is 1150-1200 DEG C, and soaking time is (0.5~0.8) × D1Minute, wherein
D1For slab maximum cross-section length.
In above-mentioned steps (2), heating temperature is 1150-1200 DEG C, soaking time (0.5~0.8) × D2Minute, wherein D2
For square billet maximum cross-section length.
In above-mentioned steps (2), the start rolling temperature of hot rolling is 1050-1200 DEG C, 900-980 DEG C of finishing temperature.
Compared with the prior art, technical solution of the present invention has the following beneficial effects:
(1) present invention is by compound addition Nb, Cu and W, to form a variety of hardening constituent MX, richness Cu phase and Dispersed precipitate
Fe2W phase, it is common that complex intensifying steel grade is precipitated.It is resistance to that a variety of alloying element complex intensifyings significantly improve novel austenite of the present invention
Hot steel Second Phase Precipitation behavior, further improve high temperature tensile properties containing austenitic heat-resistance steel, durable creeping performance with
And anti-steam corrosion performance.
(2) Novel austenitic heat-resistance steel of the invention, Cr content are that 15% or so, Ni content is 20-25%, and controls Al
Content to guarantee good steam corrosion ability resistant to high temperatures, while guaranteeing Austria of single stable by regulating and controlling three kinds of key elements
Family name's body tissue makes steel grade have high heat resistance.
(3) present invention also controls the pattern of grain boundary carbide by adding suitable B, purifies crystal boundary, improves crystal boundary and stablizes
Property, so that the durable creeping performance of steel be made to improve.
Detailed description of the invention
Fig. 1 is the SEM photograph after 1 austenite heat-resistance stainless steel timeliness 1000h of the embodiment of the present invention.
Fig. 2 is oxidizing dynamics curve of 1 to 3 austenite heat-resistance stainless steel of the embodiment of the present invention at 700 DEG C.
Specific embodiment
In order to fully understand the purpose of the present invention, feature and effect, by following specific embodiments, the present invention is made detailed
It describes in detail bright.For process of the invention in addition to following the description, remaining is all made of the conventional method or device of this field.Following nouns
Term is unless otherwise stated, all have the normally understood meaning of those skilled in the art.
The present inventor proposes a kind of austenite heat-resistance stainless steel of resistance to high temperature oxidation based on following inventive concept,
Ultra supercritical can not be met well for solving the performances such as current stainless steel high temperature creep-resistant property and high-temperature oxidation resistance
Requirement of the unit to heat-resisting material.
Specific inventive concept is: by regulation alloy element Nb, Cu and W content, making matrix that richness Cu phase and NbC analysis be precipitated
The Fe of phase and Dispersed precipitate out2W Laves phase complex intensifying significantly improves the high-temperature creep resistance of steel, and has excellent
Different high temperature oxidation resistance.For austenitic heat-resistance steel containing Al, Al is as a kind of strong ferritic stabilizer and Cr
Collective effect under can promote the appearance of ferritic phase, reduce the heat resistance of steel grade.For improving the elevated temperature strength of steel grade, especially
It is creep rupture strength is extremely important, however research before focuses principally on carbide precipitate is strengthened, hair of the invention
Bright people makes matrix that nanoscale richness Cu phase and NbC precipitated phase and disperse point be precipitated by regulation alloy element Nb, Cu and W content
The Fe of cloth2W Laves phase complex intensifying can make novel austenitic heat-resistance steel containing aluminium have superior high-temperature creep resistance
Can, and there is good high-temperature oxidation resistance.
In a first aspect, the present invention provides a kind of austenite heat-resistance stainless steels of resistance to high temperature oxidation, by weight percentage
It include: C0.04-0.1%, Cr 14-17%, Ni 20-27%, Al 2-4%, Nb 0.2-2.5%, W 0.5-5%, Cu
1.5-4%, Mn0.5-1%, S < 0.005%, P < 0.02%, the Fe of N < 0.02% and surplus.Optionally, of the invention anti-
The austenite heat-resistance stainless steel of high-temperature oxydation is by weight percentage further include: Si 0-0.5% and B 0-0.1%.
Embodiment as one preferred, the austenite heat-resistance stainless steel of resistance to high temperature oxidation of the invention percentage by weight
It include: C0.045-0.081%, Cr 14.81-16.09%, Ni 22.3-24.81%, Al 2.4-2.83%, Nb than meter
0.44-1.99%, W 1.02-3%, Cu 2.01-3.11%, Si 0.2-0.4%, Mn 0.71-0.82%, B0.005-
0.008%, S < 0.003%, P < 0.02%, the Fe of N < 0.01% and surplus.
In the present invention, synergy can be generated after above-mentioned element is combined according to special ratios, specific as follows:
Chromium: Cr is to improve the antioxidative essential element of heat resisting steel, can form Cr at high temperature2O3Fine and close protective layer.
Cr can also improve the post-curing effect of steel simultaneously, enhance the harden ability of steel.When Cr content is more than 12%, it is not only able to mention
Corrosion resistance, the inoxidizability of Gao Gang, but also the heat resistance of steel can be increased.But Cr is ferrite former, excessive Cr
It will form ferritic phase, reduce the mechanical property of steel.
Nickel: Ni is strong austenite stabilization and the element for expanding austenite phase field, and the addition of Ni can balance AFA steel
The ferrite formers such as middle Cr, Al, to obtain the austenite structure of single stable.In addition, Ni is B2-NiAl phase in AFA steel
Formation element, the present invention control Ni range, to guarantee high intensity and inoxidizability.
Aluminium: the effect of Al mainly makes steel form one layer of fine and close Al to shield at high temperature2O3Oxide layer, especially
It is so that steel is possessed superior anti-steam corrosion ability under water vapor.But Al is strong ferritic stabilizer, high Al
It will form ferritic phase, reduce the mechanical property of steel.
Niobium: Nb is carbide, forms carbide in conjunction with carbon in steel, can improve the heat resistance of steel, contain
Al austenitic heat-resistance steel Properties of High Temperature Creep is mainly by being nanoscale MC (M: mainly Nb) carbide.Nb can also be
The volume fraction of B2-NiAl can be improved in AFA steel, improve the antioxygenic property of AFA steel.
Copper: Cu can form nanoscale richness Cu phase, nanometer of the Dispersed precipitate in austenitic matrix during steel is on active service
Grade richness Cu phase can hinder dislocation motion, improve the high temperature creep property of steel.
Tungsten: W can play the role of solution strengthening, and improve Fe2W Laves phase volume fraction, inhibit Laves phase with
And M23C6Roughening rate, enhance precipitation hardened effect.
Carbon: C is element the most universal in steel, and C is to form M23C6, MX phase key element, be conducive to the heat resistance of steel.
Silicon: Si is to Cr2O3Formation have certain facilitation, in AFA steel, Si is to the affinity of O between Cr and Al
Between.Suitable Si can promote Al2O3The formation of film, and can reduce NiAl stripping section between oxide layer and matrix away from
From and improve the antioxygenic property of AFA steel.
Manganese: Mn is weaker austenite former, but can strong stable austenite tissue.The Mn in chromium nickel stainless steel
It is high to the affinity of S, the illeffects of S can be eliminated.The mechanical performance of material, therefore the present invention can be reduced when being excessively added
It is middle to control Mn content below 1%.
Boron: B can purify crystal boundary, crystal boundary stability be improved, so that the durable creeping performance of steel be made to improve.But B is easily
In cyrystal boundary segregation, therefore want the additive amount of strict control B.
Second aspect, the present invention provides a kind of preparation methods of the austenite heat-resistance stainless steel of resistance to high temperature oxidation, including
The step of forging and hot rolling, specifically, comprising:
Forging: slab is heated to 1150-1200 DEG C, soaking time (0.5~0.8) × D by the first step1Minute (wherein, D1
For slab maximum cross-section length, value is, for example, 100mm), it is forged into square billet, is carried out after forging air-cooled.
In this step, slab is from upstream process, for example, the molten steel including following element composition can be passed through smelting
Refining, continuous casting or molding obtain slab: C0.04-0.1%, Cr14-17%, Ni 20-25%, Al 2-4%, Nb 0.2-2.5%,
W 0.5-5%, Cu 1.5-4%, Mn0.5-1%, S < 0.005%, P < 0.02%, the Fe of N < 0.01% and surplus；It is optional
Ground, comprising: Si0-0.5% and B0-0.1%.
Second step, hot rolling: removal square billet surface scale is heated to 1150-1200 DEG C, keeps the temperature (0.5~0.8) × D2Point
Clock (D2For square billet maximum cross-section length, value is, for example, 220mm) start hot rolling afterwards, start rolling temperature is greater than 1050 DEG C and is less than
1200 DEG C, 900 DEG C -980 DEG C of finishing temperature, square billet thickness is rolled to 5-20mm, it is air-cooled.
Tensile strength >=the 510Mpa of austenite heat-resistance stainless steel of the invention at 700 DEG C, yield strength >=210Mpa.This
The grain size of the austenite heat-resistance stainless steel of invention is 3-5 grades.Austenite heat-resistance stainless steel of the invention is at 700 DEG C, heat preservation
1000 small oxidation weight gains at present are 0.02g/m2.Based on the property of austenite heat-resistance stainless steel of the invention, Austria of the invention
Family name's body heat-resistance stainless steel can be used for 650 DEG C or more and surpass suitable for using under 650 DEG C or more of ultra supercritical water vapor
The key position of supercritical unit, such as reheater, superheater.Therefore, the third aspect, the present invention provides austenite heat-resistances not
Rust steel is preparing the purposes in ultra supercritical unit.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient
The selection of product specification.
Embodiment 1:
The element composition (mass fraction) of the austenite heat-resistance stainless steel of the present embodiment is: 0.081%C, 0.29%Si,
0.78%Mn, 0.01%P, 0.002%S, 14.81%Cr, 25.81%Ni, 2.83%Al, 2.64%Cu, 0.44%Nb,
2.47%W, 0.0007%B, 0.002%N and it the rest is Fe.
The preparation method of the austenite heat-resistance stainless steel of the present embodiment is:
(1) forge: by element composition (mass fraction) be 0.081%C, 0.29%Si, 0.78%Mn, 0.01%P,
0.002%S, 14.81%Cr, 25.81%Ni, 2.83%Al, 2.64%Cu, 0.44%Nb, 2.47%W, 0.0007%B,
0.002%N and the slab that the rest is Fe are heated to 1150-1200 DEG C, keep the temperature 60min (slab maximum cross-section length is 100mm),
It is forged into square billet, is carried out after forging air-cooled；
(2) hot rolling: removal square billet surface scale is heated to 1150-1200 DEG C, keeps the temperature (the square billet maximum cross-section 120min
Length is 220mm) start hot rolling afterwards, about 1100 DEG C of start rolling temperature, about 950 DEG C of finishing temperature, square billet thickness is rolled to
18mm, it is air-cooled.
Embodiment 2:
The element composition (mass fraction) of the austenite heat-resistance stainless steel of the present embodiment is: 0.08%C, 0.33%Si,
0.78%Mn, 0.01%P, 0.002%S, 14.99%Cr, 25.59%Ni, 2.61%Al, 2.55%Cu, 0.99%Nb,
2.22%W, 0.0007%B, 0.0008%N and it the rest is Fe.
The preparation method of the austenite heat-resistance stainless steel of the present embodiment is:
(1) forge: by element composition (mass fraction) be 0.08%C, 0.33%Si, 0.78%Mn, 0.01%P,
0.002%S, 14.99%Cr, 25.59%Ni, 2.61%Al, 2.55%Cu, 0.99%Nb, 2.22%W, 0.0007%B,
0.0008%N and the slab that the rest is Fe are heated to 1150-1200 DEG C, and (slab maximum cross-section length is heat preservation 60min
100mm), it is forged into square billet, is carried out after forging air-cooled；
(2) hot rolling: removal square billet surface scale is heated to 1150-1200 DEG C, keeps the temperature (the square billet maximum cross-section 120min
Length is 220mm) start hot rolling afterwards, about 1100 DEG C of start rolling temperature, about 950 DEG C of finishing temperature, square billet thickness is rolled to
18mm, it is air-cooled.
Embodiment 3:
The element composition (mass fraction) of the austenite heat-resistance stainless steel of the present embodiment is: 0.073%C, 0.24%Si,
0.80%Mn, 0.01%P, 0.002%S, 14.99%Cr, 25.51%Ni, 2.65%Al, 2.84%Cu, 0.47%Nb,
0.0007%B, 0.001%N and it the rest is Fe.
The preparation method of the austenite heat-resistance stainless steel of the present embodiment is:
(1) forge: by element composition (mass fraction) be 0.073%C, 0.24%Si, 0.80%Mn, 0.01%P,
0.002%S, 14.99%Cr, 25.51%Ni, 2.65%Al, 2.84%Cu, 0.47%Nb, 0.0007%B, 0.001%N and
The slab that the rest is Fe is heated to 1150-1200 DEG C, keeps the temperature 60min (slab maximum cross-section length is 100mm), the side of being forged into
Base carries out air-cooled after forging；
(2) hot rolling: removal square billet surface scale is heated to 1150-1200 DEG C, keeps the temperature (the square billet maximum cross-section 120min
Length is 220mm) start hot rolling afterwards, about 1100 DEG C of start rolling temperature, about 950 DEG C of finishing temperature, square billet thickness is rolled to
18mm, it is air-cooled.
Embodiment 4:
The element composition (mass fraction) of the austenite heat-resistance stainless steel of the present embodiment is: 0.1%C, 0.5%Mn,
0.01%P, 0.002%S, 14%Cr, 27%Ni, 2%Al, 4%Cu, 0.2%Nb, 0.1%B, 0.001%N and it the rest is Fe.
The preparation method of the austenite heat-resistance stainless steel of the present embodiment is same as Example 1, and difference is only that according to element
The pairs of slab of group is adjusted accordingly.
Embodiment 5:
The element composition (mass fraction) of the austenite heat-resistance stainless steel of the present embodiment is: 0.04%C, 0.5%Si, 1%
Mn, 0.01%P, 0.002%S, 17%Cr, 20%Ni, 4%Al, 1.5%Cu, 2.5%Nb, 0.001%N and it the rest is Fe.
The preparation method of the austenite heat-resistance stainless steel of the present embodiment is same as Example 1, and difference is only that according to element
The pairs of slab of group is adjusted accordingly.
The performance of the austenite heat-resistance stainless steel of the various embodiments described above is tested, wherein test method is as follows:
Heat treatment: by the austenite heat-resistance stainless steel of embodiment 1 at 1150 DEG C~1250 DEG C 30 to 180 points of solution treatment
Clock, water cooling obtain single austenite structure, and then in 700 DEG C of progress 1000h ageing treatments, tissue signature is as shown in Figure 1.
As seen from Figure 1, it need to strengthen phase based on MX phase and tiny Fe2W Laves phase, the nanoscale richness Cu being precipitated during military service
Mutually also there is invigoration effect.
Yield strength and tensile strength test method are as follows: GB/T228.1-2010 " metal material stretching test first part:
Room temperature test method ",
High-temperature oxidation resistance: the austenite heat-resistance stainless steel of the various embodiments described above is at 700 DEG C, in Ar+10%H2Under O atmosphere
Oxidizing dynamics curve it is as shown in Figure 2.
The austenite heat-resistance stainless steel of the various embodiments described above 700 DEG C high temperature tensile strength and high temperature oxidation resistance such as
Shown in table 1:
Table 1
The present invention is hereinbefore disclosed with preferred embodiment, but it should be understood by those skilled in the art that, these
Embodiment is only used for describing the present invention, but should not be understood as limiting the scope of the invention.It should be noted that all implement with these
Example equivalent variation and displacement, should all be set as being covered by scope of the presently claimed invention.Therefore, protection scope of the present invention
It should be subject to range defined in claims.
Claims (10)
1. a kind of austenite heat-resistance stainless steel of resistance to high temperature oxidation, which is characterized in that by weight percentage include: C 0.04-
0.1%, Cr 14-17%, Ni 20-27%, Al 2-4%, Nb 0.2-2.5%, W 0.5-5%, Cu 1.5-4%, Mn
0.5-1%, S < 0.005%, P < 0.02%, the Fe of N < 0.02% and surplus.
2. the austenite heat-resistance stainless steel of resistance to high temperature oxidation according to claim 1, which is characterized in that by weight percentage
Meter further include: Si 0-0.5% and B 0-0.1%.
3. austenite heat-resistance stainless steel according to claim 2, which is characterized in that by weight percentage include: C
0.045-0.081%, Cr 14.81-16.09%, Ni 22.3-24.81%, Al 2.4-2.83%, Nb 0.44-1.99%, W
1.02-3%, Cu 2.01-3.11%, Si 0.2-0.4%, Mn 0.71-0.82%, B 0.005-0.008%, S <
The Fe of 0.003%, P < 0.02%, N < 0.01% and surplus.
4. austenite heat-resistance stainless steel according to claim 1-3, which is characterized in that the austenite heat-resistance is not
Become rusty tensile strength 510Mpa, yield strength 210Mpa of the steel at 700 DEG C.
5. austenite heat-resistance stainless steel according to claim 1-3, which is characterized in that the austenite heat-resistance is not
The grain size of rust steel is 3-5 grades.
6. the preparation method of the described in any item austenite heat-resistance stainless steels of claim 1-5 characterized by comprising
(1) slab is heated and is kept the temperature, be forged into square billet, it is then air-cooled；
(2) oxide skin for removing square billet surface, heats and keeps the temperature, subsequent hot.
7. the preparation method of austenite heat-resistance stainless steel according to claim 6, which is characterized in that, will in step (1)
Slab is heated to 1150-1200 DEG C, soaking time (0.5~0.8) × D1Minute, wherein D1For slab maximum cross-section length.
8. the preparation method of austenite heat-resistance stainless steel according to claim 6, which is characterized in that, will in step (2)
Square billet is heated to 1150-1200 DEG C, soaking time (0.5~0.8) × D2Minute, wherein D2For square billet maximum cross-section length.
9. the preparation method of austenite heat-resistance stainless steel according to claim 6, which is characterized in that in step (2), heat
The start rolling temperature rolled is 1050-1200 DEG C, 900-980 DEG C of finishing temperature.
10. the described in any item austenite heat-resistance stainless steels of claim 1-5 are preparing the purposes in ultra supercritical unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247396A (en) * | 2020-10-26 | 2021-01-22 | 南京工程学院 | Austenite heat-resistant steel welding wire and preparation method and application thereof |
| CN114657475A (en) * | 2022-03-04 | 2022-06-24 | 中国科学院金属研究所 | Liquid lead-bismuth corrosion resistant austenitic stainless steel for high-temperature fastener and preparation method thereof |
| CN115233105A (en) * | 2022-07-28 | 2022-10-25 | 中国核动力研究设计院 | Austenitic stainless steel alloy for supercritical gas cooled reactor fuel cladding and preparation method thereof |
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| CN115233105A (en) * | 2022-07-28 | 2022-10-25 | 中国核动力研究设计院 | Austenitic stainless steel alloy for supercritical gas cooled reactor fuel cladding and preparation method thereof |
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