CN110066957A - Corrosion-resistant super austenitic stainless steel of modified and preparation method thereof - Google Patents
Corrosion-resistant super austenitic stainless steel of modified and preparation method thereof Download PDFInfo
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- CN110066957A CN110066957A CN201910414820.8A CN201910414820A CN110066957A CN 110066957 A CN110066957 A CN 110066957A CN 201910414820 A CN201910414820 A CN 201910414820A CN 110066957 A CN110066957 A CN 110066957A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
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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
- C22C33/06—Making ferrous alloys by melting using master alloys
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- 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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- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
Abstract
The invention discloses corrosion-resistant super austenitic stainless steel of a kind of modified and preparation method thereof, which includes: the carbon of 0.01~0.02 weight %；The silicon of 0.4~0.6 weight %；The manganese of 0~0.2 weight %；The phosphorus of 0~0.02 weight %；The sulphur of 0~0.01 weight %；The chromium of 21~22 weight %；The nickel of 24~25.5 weight %；The molybdenum of 6.0~7.0 weight %；The vanadium of 1~3 weight %；The niobium of 0~3 weight %；The nitrogen of 0.20~0.25 weight %；The rare earth element of 0~0.1 weight %；And the iron of surplus.The corrosion-resistant super austenitic stainless steel of the modified does not add manganese or manganese element content is lower, and nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
Description
Technical field
The invention belongs to nitrogenous corrosion-resistant stainless steel fields, specifically, the present invention relates to the corrosion-resistant super Austria of modified
Family name's body stainless steel and preparation method thereof.
Background technique
N08367 stainless steel (also known as AL-6XN) is a kind of nitrogen reinforcing austenitic stainless steel, due to excellent comprehensive performance
Referred to as super austenitic stainless steel.According to ASTM B690 standard, N08367 stainless steel chemical component is as follows: C≤0.03%,
Mn≤2.0%, Si≤1.0%, P≤0.04%, S≤0.03%, Cr:20.0%~22.0%, Ni:23.5%~25.5%,
Mo:6.0%~7.0%, N:0.18%~0.25%, Cu≤0.75%.The big feature of the one of N08367 stainless steel is added in steel
Nitrogen, nitrogen can expand austenite phase field, replace alloy part elemental nickel.In severe use environment, nitrogen
With CrN, NH4 +、NH3、N(atom)、N2(free) form is enriched in passivation for stainless steel layer surface, improves the anticorrosive of stainless steel
Performance.Meanwhile in the case where significantly not damaging plasticity and toughness, steel is can be improved in solution strengthening effect of the nitrogen in steel
Intensity.Therefore, the corrosion resistance of N08367 stainless steel is much better than 300 series stainless steels and 904L stainless steel, and cost is remote
Lower than corrosion-resistant nickel-base alloy such as N06625, N10276 etc., it is very suitable for the seaside nuclear power station seawater system throughout the year with contact with sea water
The manufacture of the industrial circles components such as system, floating nuclear power plant, marine oil gas field platform.China third-generation nuclear power technology AP1000
N08367 stainless steel material has been all made of with the seawater anticorrosion pipeline of CAP1400 nuclear power station.
Since solubility is extremely low in steel for nitrogen, improving content of the nitrogen in steel is always more scabrous ask
Topic.Lu Yong, Zhang Shiyan etc. point out that chemical component is to influence nitrogen in ferroalloy one of an important factor for content.Li Huabing,
Jiang Zhouhua etc. establishes Calculation of Solubility model of the nitrogen in Fe-Cr-Mn alloy system, it is believed that improves austenite in alloy system
The mass fraction of formation element (such as manganese), can reduce the precipitation of nitrogen, improve the solubility of nitrogen.In Wang Guozheng research discovery nitrogenous steel
Chromium, manganese content and nitrogen content are proportional, and the addition of chromium, manganese element can effectively improve the solubility of nitrogen in steel.N08367 is not
Steel become rusty when ingredient designs, improves solubility of the nitrogen in N08367 stainless steel also by the mode of addition manganese element,
Mn element mass fraction is within 2.0% in N08367 stainless steel.
But manganese element is added in N08367 stainless steel in a manner of improving nitrogen solubility, there are inborn defects.Manganese
The addition of element can promote the generation of nonmetallic inclusionsin steel MnS, influence the intensity and corrosion resistance of steel.Tang Jianqun, Gong
The corrosion failure and strip MnS field trash for building the researchs such as ring discovery steel have direct relation.Chen Xuequn, Chen Debin etc. refer to
Out since steel matrix and MnS intersection passivating film are weak, corrosion preferentially occurs from interface, ultimately causes the failure of components.
The researchs such as Ji Eyu, Chen Hailing find the synergistic effect of MnS and microorganism in stainless steel pipes, accelerate the formation of spot corrosion,
Even generate pipe perforation.In the material that marine environment is on active service, corrode as caused by MnS non-metallic inclusion and marine microorganism
Phenomenon is more obvious.
In addition, also proposed and want to the high-temperature corrosion resistance performance of super austenitic stainless steel in certain specific application areas
It asks.Such as the N08367 pipeline in AP1000 and CAP1400 nuclear power station sea water service system close to workshop end, the maximum of ASME design is used
Temperature is 427 DEG C.N08367 stainless steel is as one of forth generation Supercritical-Pressure Light Water Cooled Reactor (SCWR) in-pile component candidate material, in heap
In theory using temperature be 374 DEG C.Qiao Yanxin, Ren Ai, Liu Feihua etc. have studied N08367 super austenitic stainless steel super
Apparent corrosion has occurred in corrosion behavior in critical, discovery N08367 super austenitic stainless steel in high-temperature supercritical water
Phenomenon.
In recent years, domestic scholars study super austenitic stainless steel, but to N08367 super austenitic stainless steel
Improving and optimizating for ingredient is still less.Chen Haitao, Lang Yu equality are the Mo content reduced in austenitic stainless steel, improve stainless steel
Thermal structure stability energy, reduces the tendency of the compound between precipitating metal in hot-working and welding process, and reduces stainless steel
Cost proposes a kind of high-chromium austenite stainless steel (106636851 A of CN)；But the patent is not for the super Ovshinsky of N08367
Body stainless steel, and chemical component difference is larger.Yang Zhen, face great waves etc. propose a kind of super austenitic stainless steel and its preparation side
Method, but wherein N≤0.1% are free of vanadium, niobium element, and the essential elements such as remaining Cr, Ni, Mn have larger difference.
In conclusion with the development of modern industry, the requirement to material property and phase in longevity of being on active service is gradually increased, N08367
Super austenitic stainless steel material cannot fully meet actual demand.Therefore, develop a kind of low manganese or without manganese, nitrogen content compared with
High and with more excellent corrosion resistance modified N08367 super austenitic stainless steel is of great practical significance.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of corrosion-resistant super austenitic stainless steel of modified and preparation method thereof.The modified is corrosion-resistant super
Grade austenitic stainless steel does not add manganese or manganese element content is lower, and nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, intensity
It is higher, excellent combination property.
In one aspect of the invention, the invention proposes a kind of corrosion-resistant super austenitic stainless steel of modified, according to
The embodiment of the present invention, the stainless steel include:
The carbon of 0.01~0.02 weight %；
The silicon of 0.4~0.6 weight %；
The manganese of 0~0.2 weight %；
The phosphorus of 0~0.02 weight %；
The sulphur of 0~0.01 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25.5 weight %；
The molybdenum of 6.0~7.0 weight %；
The vanadium of 1~3 weight %；
The niobium of 0~3 weight %；
The nitrogen of 0.20~0.25 weight %；
The rare earth element of 0~0.1 weight %；And
The iron of surplus.
The corrosion-resistant super austenitic stainless steel of modified according to an embodiment of the present invention, does not add manganese element, and if stainless
Steel contains micro manganese element due to raw material or melting, then controls its content no more than 0.2wt%, be mingled with reducing MnS
The tendency that object is formed reduces influence of the MnS to stainless steel corrosion resistance；By the way that vanadium is added, manganese element can be replaced to improve
Solubility of the nitrogen in stainless steel guarantees sufficiently high nitrogen element content in stainless steel, while vanadium can play the role of refined crystalline strengthening,
The intensity, toughness and high temperature creep property of stainless steel are improved, and nitrogenizes the dispersion-strengthened action of vfanadium compound, can further improve
The corrosion resistance and high temperature creep property of stainless steel；And niobium can same chromium, vanadium interaction, improve nitrogen it is molten in stainless steel
Xie Du, while niobium can form the NbC of high degree of dispersion with micro carbon, play the role of refined crystalline strengthening, improve the intensity of stainless steel,
The elevated temperature strength and high-temperature corrosion-resistance performance for improving stainless steel, improve the high-temperature service performance of stainless steel；Rare earth element is conducive to
Desulfurizing and purifying molten steel reduces the formability of MnS compound, improves the rigidity and corrosion resistance of stainless steel, while can make steel
In the nodularization of strip MnS compound, refinement and the disperse branch that have generated, improve the impact resistance of stainless steel, resistance to room temperature and
High temperature dot corrosive nature, and rare earth element can be interacted with low-melting impurities such as phosphorus, arsenic, antimony, bismuth, lead, copper in stainless steel
Effect, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves the corrosion among crystalline grains of stainless steel.By
This, the corrosion-resistant super austenitic stainless steel of the modified is still ensured that in the case where not adding manganese or the lower situation of manganese element content
Stainless steel nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
In addition, the corrosion-resistant super austenitic stainless steel of modified according to the above embodiment of the present invention can also have it is as follows
Additional technical characteristic:
In some embodiments of the invention, the rare earth element is selected from least one of lanthanum, cerium and yttrium.As a result,
Be conducive to improve rigidity, impact resistance and the corrosion resistance of the corrosion-resistant super austenitic stainless steel of modified.
In some embodiments of the invention, the stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~
The silicon of 0.5 weight %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；0~0.002 weight %
The sulphur；The chromium of 21~22 weight %；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；2~
The vanadium of 3 weight %；The nitrogen of 0.24~0.25 weight %；And the iron of surplus.Corrosion resistance can be obtained as a result,
It can preferable, the corrosion-resistant super austenitic stainless steel of comprehensive performance preferably modified.
In some embodiments of the invention, the stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~
The silicon of 0.5 weight %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；0~0.002 weight %
The sulphur；The chromium of 21~22 weight %；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；2~
The vanadium of 3 weight %；The niobium of 1~3 weight %；The nitrogen of 0.24~0.25 weight %；0~0.1 weight %'s is dilute
Earth elements；And the iron of surplus.Can be obtained as a result, corrosion resistance preferably, comprehensive performance preferably modified it is corrosion-resistant super
Austenitic stainless steel.
In some embodiments of the invention, the stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~
The silicon of 0.5 weight %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；0~0.002 weight %
The sulphur；The chromium of 21~22 weight %；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；2~
The vanadium of 3 weight %；The niobium of 1~3 weight %；The nitrogen of 0.24~0.25 weight %；The lanthanum of 0~0.1 weight %,
Cerium or yttrium；And the iron of surplus.Can be obtained as a result, corrosion resistance preferably, comprehensive performance preferably modified it is corrosion-resistant super
Austenitic stainless steel.
In some embodiments of the invention, the stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~
The silicon of 0.5 weight %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；0~0.002 weight %
The sulphur；The chromium of 21~22 weight %；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；2~
The vanadium of 3 weight %；The niobium of 1~3 weight %；The nitrogen of 0.24~0.25 weight %；The lanthanum of 0~0.1 weight %
With cerium summation；And the iron of surplus.Can be obtained as a result, corrosion resistance preferably, comprehensive performance preferably modified it is corrosion-resistant super
Grade austenitic stainless steel.
In some embodiments of the invention, the stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~
The silicon of 0.5 weight %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；0~0.002 weight %
The sulphur；The chromium of 21~22 weight %；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；2~
The vanadium of 3 weight %；The niobium of 1~3 weight %；The nitrogen of 0.24~0.25 weight %；The lanthanum of 0~0.1 weight %,
Cerium and yttrium summation；And the iron of surplus.Can be obtained as a result, corrosion resistance preferably, comprehensive performance preferably modified it is corrosion-resistant
Super austenitic stainless steel.
In another aspect of the invention, the corrosion-resistant super austenitic of above-mentioned modified is prepared not the invention proposes a kind of
The method of rust steel, according to an embodiment of the invention, this method comprises:
(1) it is smelted after mixing ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum, to obtain molten liquid；
(2) molten liquid and rare earth element are subjected to argon-oxygen-decarburizing process refining, to obtain refining liquid；
(3) refining liquid is sent to ladle refining furnace and is refined, to obtain the corrosion-resistant super Austria of the modified
Family name's body stainless steel.
The method according to an embodiment of the present invention for preparing the corrosion-resistant super austenitic stainless steel of above-mentioned modified, is not added
Manganese element, and if stainless steel due to raw material or melting contain micro manganese element, control its content and be not more than
0.2wt% reduces influence of the MnS to stainless steel corrosion resistance to reduce the tendency of MnS field trash formation；By the way that vanadium is added
Element can replace manganese element to improve solubility of the nitrogen in stainless steel, guarantee sufficiently high nitrogen element content in stainless steel, simultaneously
Vanadium can play the role of refined crystalline strengthening, improve the intensity, toughness and high temperature creep property of stainless steel, and nitrogenize the disperse of vfanadium compound
Invigoration effect can further improve the corrosion resistance and high temperature creep property of stainless steel；And niobium can same chromium, vanadium phase interaction
With, solubility of the raising nitrogen in stainless steel, while niobium can form the NbC of high degree of dispersion with micro carbon, and it is strong to play fine grain
Change effect, improves the intensity of stainless steel, improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improve the high temperature of stainless steel
Military service performance；Rare earth element is conducive to desulfurizing and purifying molten steel, reduces the formability of MnS compound, improves the rigidity of stainless steel
And corrosion resistance, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve stainless
The impact resistance of steel, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can in stainless steel phosphorus, arsenic, antimony, bismuth, lead,
Reciprocation occurs for the low-melting impurities such as copper, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improve not
The corrosion among crystalline grains of rust steel.As a result, the corrosion-resistant super austenitic stainless steel of the modified do not add manganese or manganese element content compared with
Low, nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
In addition, the method according to the above embodiment of the present invention for preparing the corrosion-resistant super austenitic stainless steel of above-mentioned modified
It can also have the following additional technical features:
In some embodiments of the invention, in step (2), the temperature of the refining is 1500-1700 degrees Celsius.By
This, is conducive to remove the carbon in molten steel, and inhibit the oxidation of chromium in steel.
In some embodiments of the invention, in step (3), the temperature of the refining is 1500-1650 degrees Celsius.By
This, is conducive to the ingredient for adjusting molten steel, obtains the corrosion-resistant super Ovshinsky of the preferable modified of comprehensive performance and corrosion resistance
Body stainless steel.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the method flow for preparing the corrosion-resistant super austenitic stainless steel of modified of an implementation power according to the present invention
Schematic diagram.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In one aspect of the invention, the invention proposes a kind of corrosion-resistant super austenitic stainless steel of modified, according to
The embodiment of the present invention, the stainless steel include: the carbon of 0.01~0.02 weight %；The silicon of 0.4~0.6 weight %；0~0.2 weight
Measure the manganese of %；The phosphorus of 0~0.02 weight %；The sulphur of 0~0.01 weight %；The chromium of 21~22 weight %；24~25.5 weight %
Nickel；The molybdenum of 6.0~7.0 weight %；The vanadium of 1~3 weight %；The niobium of 0~3 weight %；The nitrogen of 0.20~0.25 weight %；0
The rare earth element of~0.1 weight %；And the iron of surplus.Inventors have found that passing through the control corrosion-resistant super austenitic of modified
The content of manganese element in stainless steel can reduce the tendency of MnS field trash formation, reduce MnS to the shadow of stainless steel corrosion resistance
It rings；By the way that vanadium is added in the corrosion-resistant super austenitic stainless steel of modified, manganese element can be replaced to improve nitrogen in stainless steel
Solubility, while can play the role of refined crystalline strengthening, improves the intensity, toughness and high temperature creep property of stainless steel, and vanadium nitride
The dispersion-strengthened action for closing object, can further improve the corrosion resistance and high temperature creep property of stainless steel；And niobium can same chromium, vanadium unit
Element interaction improves solubility of the nitrogen in stainless steel, while niobium can form the NbC of high degree of dispersion with micro carbon, rise
It is acted on to refined crystalline strengthening, improves the intensity of stainless steel, improve the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improved stainless
The high-temperature service performance of steel；Rare earth element is conducive to desulfurizing and purifying molten steel, reduces the formability of MnS compound, improves stainless
The rigidity and corrosion resistance of steel, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made,
Improve stainless steel impact resistance, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can in stainless steel phosphorus, arsenic,
Reciprocation occurs for the low-melting impurities such as antimony, bismuth, lead, copper, inhibits these elements segregation on crystal boundary, plays the work of purification crystal boundary
With improving the corrosion among crystalline grains of stainless steel.The corrosion-resistant super austenitic stainless steel of the modified does not add manganese or manganese member as a result,
Cellulose content is lower, and nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
According to one embodiment of present invention, rare earth element can be for selected from least one of lanthanum, cerium and yttrium.Inventor
It was found that being conducive to desulfurizing and purifying molten steel by the way that rare earth element is added, reduces the formability of MnS compound, improve stainless steel
Rigidity and corrosion resistance, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve
The impact resistance of stainless steel, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can in stainless steel phosphorus, arsenic, antimony,
Reciprocation occurs for the low-melting impurities such as bismuth, lead, copper, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary,
Improve the corrosion among crystalline grains of stainless steel.
Still another embodiment in accordance with the present invention, stainless steel include: the carbon of 0.015~0.02 weight %；0.4~0.5 weight
Measure the silicon of %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；The sulphur of 0~0.002 weight %；21~22 weight %
Chromium；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；The vanadium of 2~3 weight %；The nitrogen of 0.24~0.25 weight %；
And the iron of surplus.Inventors have found that by the content of manganese element in the control corrosion-resistant super austenitic stainless steel of modified, it can
The tendency that MnS field trash is formed is reduced, influence of the MnS to stainless steel corrosion resistance is reduced；By corrosion-resistant super in modified
Vanadium is added in grade austenitic stainless steel, manganese element can be replaced to improve solubility of the nitrogen in stainless steel, while it is strong to play fine grain
Change effect, improves the intensity, toughness and high temperature creep property of stainless steel, and nitrogenize the dispersion-strengthened action of vfanadium compound, can be into
The corrosion resistance and high temperature creep property of one step raising stainless steel.The corrosion-resistant super austenitic stainless steel of the modified is not as a result,
It adds manganese or manganese element content is lower, nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, and comprehensive performance is excellent
It is different.
According to still another embodiment of the invention, stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~0.5 weight
Measure the silicon of %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；The sulphur of 0~0.002 weight %；21~22 weight %
Chromium；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；The vanadium of 2~3 weight %；The niobium of 1~3 weight %；0.24~
The nitrogen of 0.25 weight %；The rare earth element of 0~0.1 weight %；And the iron of surplus.Inventors have found that passing through control modified
The content of manganese element in corrosion-resistant super austenitic stainless steel can reduce the tendency of MnS field trash formation, reduce MnS to stainless
The influence of steel corrosion resistance；By the way that vanadium is added in the corrosion-resistant super austenitic stainless steel of modified, can be mentioned instead of manganese element
Solubility of the high nitrogen in stainless steel, while refined crystalline strengthening can be played the role of, improve the intensity, toughness and high-temerature creep of stainless steel
Performance, and the dispersion-strengthened action of vfanadium compound is nitrogenized, it can further improve the corrosion resistance and high temperature creep property of stainless steel；
By being added niobium in the corrosion-resistant super austenitic stainless steel of modified, niobium can same chromium, vanadium interaction, improve nitrogen not
Solubility in rust steel, while niobium can form the NbC of high degree of dispersion with micro carbon, play the role of refined crystalline strengthening, improve not
The intensity of rust steel, improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improves the high-temperature service performance of stainless steel；And it is dilute
Earth elements are conducive to desulfurizing and purifying molten steel, reduce the formability of MnS compound, improve the rigidity and corrosion resistance of stainless steel
Can, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve the impact resistance of stainless steel
Performance, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can be with the low melting points such as phosphorus, arsenic, antimony, bismuth, lead, copper in stainless steel
Reciprocation occurs for impurity, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves the intergranular of stainless steel
Corrosive nature.The corrosion-resistant super austenitic stainless steel of the modified does not add manganese as a result, or manganese element content is lower, nitrogen content compared with
Height, anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
According to still another embodiment of the invention, stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~0.5 weight
Measure the silicon of %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；The sulphur of 0~0.002 weight %；21~22 weight %
Chromium；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；The vanadium of 2~3 weight %；The niobium of 1~3 weight %；0.24~
The nitrogen of 0.25 weight %；Lanthanum, cerium or the yttrium of 0~0.1 weight %；And the iron of surplus.Inventors have found that passing through control modified
The content of manganese element in corrosion-resistant super austenitic stainless steel can reduce the tendency of MnS field trash formation, reduce MnS to stainless
The influence of steel corrosion resistance；By the way that vanadium is added in the corrosion-resistant super austenitic stainless steel of modified, can be mentioned instead of manganese element
Solubility of the high nitrogen in stainless steel, while refined crystalline strengthening can be played the role of, improve the intensity, toughness and high-temerature creep of stainless steel
Performance, and the dispersion-strengthened action of vfanadium compound is nitrogenized, it can further improve the corrosion resistance and high temperature creep property of stainless steel；
By being added niobium in the corrosion-resistant super austenitic stainless steel of modified, niobium can same chromium, vanadium interaction, improve nitrogen not
Solubility in rust steel, while niobium can form the NbC of high degree of dispersion with micro carbon, play the role of refined crystalline strengthening, improve not
The intensity of rust steel, improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improves the high-temperature service performance of stainless steel；And it is dilute
Earth elements are conducive to desulfurizing and purifying molten steel, reduce the formability of MnS compound, improve the rigidity and corrosion resistance of stainless steel
Can, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve the impact resistance of stainless steel
Performance, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can be with the low melting points such as phosphorus, arsenic, antimony, bismuth, lead, copper in stainless steel
Reciprocation occurs for impurity, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves the intergranular of stainless steel
Corrosive nature.The corrosion-resistant super austenitic stainless steel of the modified does not add manganese as a result, or manganese element content is lower, nitrogen content compared with
Height, anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
According to still another embodiment of the invention, stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~0.5 weight
Measure the silicon of %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；The sulphur of 0~0.002 weight %；21~22 weight %
Chromium；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；The vanadium of 2~3 weight %；The niobium of 1~3 weight %；0.24~
The nitrogen of 0.25 weight %；The lanthanum and cerium summation of 0~0.1 weight %；And the iron of surplus.Inventors have found that being improved by control
The content of manganese element in the corrosion-resistant super austenitic stainless steel of type can reduce the tendency of MnS field trash formation, reduce MnS to not
The influence of rust steel corrosion resistance；By the way that vanadium is added in the corrosion-resistant super austenitic stainless steel of modified, manganese element can be replaced
Solubility of the nitrogen in stainless steel is improved, while refined crystalline strengthening can be played the role of, intensity, toughness and the high temperature for improving stainless steel are compacted
Denaturation energy, and the dispersion-strengthened action of vfanadium compound is nitrogenized, it can further improve the corrosion resistance and high temperature creep of stainless steel
Energy；By being added niobium in the corrosion-resistant super austenitic stainless steel of modified, niobium can same chromium, vanadium interaction, improve nitrogen
Solubility in stainless steel, while niobium can form the NbC of high degree of dispersion with micro carbon, play the role of refined crystalline strengthening, mention
The intensity of high stainless steel improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improves the high-temperature service performance of stainless steel；
And rare earth element is conducive to desulfurizing and purifying molten steel, reduces the formability of MnS compound, improves the rigidity of stainless steel and anticorrosive
Performance, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve the resistance to punching of stainless steel
Hit performance, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can be with the eutectics such as phosphorus, arsenic, antimony, bismuth, lead, copper in stainless steel
Reciprocation occurs for point impurity, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves the crystalline substance of stainless steel
Between corrosive nature.The corrosion-resistant super austenitic stainless steel of the modified does not add manganese as a result, or manganese element content is lower, nitrogen content
Higher, anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
According to still another embodiment of the invention, stainless steel includes: the carbon of 0.015~0.02 weight %；0.4~0.5 weight
Measure the silicon of %；The manganese of 0~0.1 weight %；The phosphorus of 0~0.015 weight %；The sulphur of 0~0.002 weight %；21~22 weight %
Chromium；The nickel of 24~25 weight %；The molybdenum of 6.0~6.5 weight %；The vanadium of 2~3 weight %；The niobium of 1~3 weight %；0.24~
The nitrogen of 0.25 weight %；Lanthanum, cerium and the yttrium summation of 0~0.1 weight %；And the iron of surplus.Inventors have found that being changed by control
Into the content of manganese element in the corrosion-resistant super austenitic stainless steel of type, the tendency of MnS field trash formation can be reduced, reduces MnS pairs
The influence of stainless steel corrosion resistance；By the way that vanadium is added in the corrosion-resistant super austenitic stainless steel of modified, manganese member can be replaced
Element improves solubility of the nitrogen in stainless steel, while can play the role of refined crystalline strengthening, improves the intensity, toughness and high temperature of stainless steel
Croop property, and the dispersion-strengthened action of vfanadium compound is nitrogenized, it can further improve the corrosion resistance and high-temerature creep of stainless steel
Performance；By being added niobium in the corrosion-resistant super austenitic stainless steel of modified, niobium can same chromium, vanadium interaction, improve
Solubility of the nitrogen in stainless steel, while niobium can form the NbC of high degree of dispersion with micro carbon, play the role of refined crystalline strengthening,
The intensity for improving stainless steel, improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improves the high-temperature service of stainless steel
Energy；And rare earth element is conducive to desulfurizing and purifying molten steel, reduces the formability of MnS compound, improves the rigidity of stainless steel and resists
Corrosive nature, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve stainless steel
Impact resistance, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can be with phosphorus, arsenic, antimony, bismuth, lead, the copper etc. in stainless steel
Reciprocation occurs for low-melting impurities, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves stainless steel
Corrosion among crystalline grains.The corrosion-resistant super austenitic stainless steel of the modified does not add manganese as a result, or manganese element content is lower, nitrogen
Content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
The corrosion-resistant super austenitic stainless steel of modified according to an embodiment of the present invention, does not add manganese element, and if stainless
Steel contains micro manganese element due to raw material or melting, then controls its content no more than 0.2wt%, be mingled with reducing MnS
The tendency that object is formed reduces influence of the MnS to stainless steel corrosion resistance；By the way that vanadium is added, manganese element can be replaced to improve
Solubility of the nitrogen in stainless steel guarantees sufficiently high nitrogen element content in stainless steel, while vanadium can play the role of refined crystalline strengthening,
The intensity, toughness and high temperature creep property of stainless steel are improved, and nitrogenizes the dispersion-strengthened action of vfanadium compound, can further improve
The corrosion resistance and high temperature creep property of stainless steel；And niobium can same chromium, vanadium interaction, improve nitrogen it is molten in stainless steel
Xie Du, while niobium can form the NbC of high degree of dispersion with micro carbon, play the role of refined crystalline strengthening, improve the intensity of stainless steel,
The elevated temperature strength and high-temperature corrosion-resistance performance for improving stainless steel, improve the high-temperature service performance of stainless steel；Rare earth element is conducive to
Desulfurizing and purifying molten steel reduces the formability of MnS compound, improves the rigidity and corrosion resistance of stainless steel, while can make steel
In the nodularization of strip MnS compound, refinement and the disperse branch that have generated, improve the impact resistance of stainless steel, resistance to room temperature and
High temperature dot corrosive nature, and rare earth element can be interacted with low-melting impurities such as phosphorus, arsenic, antimony, bismuth, lead, copper in stainless steel
Effect, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves the corrosion among crystalline grains of stainless steel.By
This, the corrosion-resistant super austenitic stainless steel of the modified does not add manganese or manganese element content is lower, and nitrogen content is higher, anti-room temperature and
High temperature corrosion property is good, and intensity is higher, excellent combination property.
According to an embodiment of the invention, the above-mentioned corrosion-resistant super austenitic stainless steel of modified at least has the advantage that
According to one embodiment of present invention, extremely low without manganese or manganese content in stainless steel of the present invention, the corruption as caused by MnS
It is small to lose risk；
Still another embodiment in accordance with the present invention, for stainless steel of the present invention in the case where being free of manganese, nitrogen content is still higher, comprehensive
It is good to close performance；
According to still another embodiment of the invention, the resistance to spot corrosion indices P REN=(%Cr+3.3% of stainless steel of the present invention
Mo+30%N) >=49；
According to still another embodiment of the invention, the resistance to spot corrosion better performances of stainless steel of the present invention, according to ASTM G48A
Method corrodes 72h at a temperature of 80 DEG C, obvious spot corrosion does not occur；It is tested according to ASTM G48E method, critical point corrosion temperature >=
75℃；
According to still another embodiment of the invention, the slit and corrosion resistant performance of stainless steel of the present invention is preferable, according to ASTM
G48B method corrodes 72h at a temperature of 45 DEG C, obvious spot corrosion does not occur；It is tested according to ASTM G48F method, critical spot corrosion temperature
>=40 DEG C of degree；
According to still another embodiment of the invention, the anti intercrystalline corrosion performance of stainless steel of the present invention is preferable, according to ASTM
A262E carries out intergranular corrosion test, does not find obvious intercrystalline corrosion phenomenon；
According to still another embodiment of the invention, the anti-stress corrosion performance of stainless steel of the present invention is preferable, according to ASTM
G36 method using 26%NaCl corrosive liquid, carries out 1000h stress etching experiment at room temperature, does not find that obvious stress is rotten
Lose phenomenon；
According to still another embodiment of the invention, the resistance to high temperature corrosion performance of stainless steel of the present invention is preferable, 500 DEG C/
Corrosion weight loss rate in the supercritical water of 25MPa and 600 DEG C/25MPa is respectively smaller than 6 μ g/ (dm2h) and 18 μ g/ (dm2
H), under the conditions of 600-650 DEG C/25MPa, there is lesser stress corrosion cracking tendency；
According to still another embodiment of the invention, the mechanical property of stainless steel of the present invention is preferable.It is suitably forged and is consolidated passing through
After molten heat treatment (1000 DEG C -1050 DEG C), yield strength RP0.2 >=380MPa of the invention stainless steel, tensile strength Rm >=
730MPa, ballistic work >=120J, hardness HRB≤85.
In another aspect of the invention, the corrosion-resistant super austenitic of above-mentioned modified is prepared not the invention proposes a kind of
The method of rust steel, according to an embodiment of the invention, with reference to Fig. 1, this method comprises:
S100: it is smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed
In the step, smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed, to be melted
Melt liquid.Specifically, can be carried out in advance to each raw material pre- before mixing ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum
Processing, such as remove greasy dirt, the iron rust etc. in each raw material.Inventors have found that manganese can be replaced by the way that vanadium is added into molten iron
Element improves solubility of the nitrogen in stainless steel, guarantees sufficiently high nitrogen element content in stainless steel, while vanadium can play fine grain
Invigoration effect, improves the intensity, toughness and high temperature creep property of stainless steel, and nitrogenizes the dispersion-strengthened action of vfanadium compound, can
Further increase the corrosion resistance and high temperature creep property of stainless steel；By the way that niobium element is added, niobium can same chromium, vanadium phase interaction
With, solubility of the raising nitrogen in stainless steel, while niobium can form the NbC of high degree of dispersion with micro carbon, and it is strong to play fine grain
Change effect, improves the intensity of stainless steel, improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improve the high temperature of stainless steel
Military service performance；By the way that nickel element is added, it can promote the austenitizing of stainless steel, improve the intensity and corrosion resistant corrosive nature of stainless steel
Deng；By the way that chromium is added, intensity, corrosion resistance and high temperature resistance of stainless steel etc. can be improved；By the way that molybdenum element is added,
Stainless steel hot epistasis can be improved, improve stainless steel corrosion stability, reduce stainless steel spot corrosion tendency etc.；And in the present invention, it does not add
Manganese element controls its content and is not more than 0.2wt% if stainless steel contains micro manganese element due to raw material or melting,
To reduce the tendency of MnS field trash formation, reduce influence of the MnS to stainless steel corrosion resistance.
S200: molten liquid and rare earth element are subjected to argon-oxygen-decarburizing process refining
In the step, molten liquid and rare earth element are subjected to argon-oxygen-decarburizing process refining, to obtain refining liquid.Specifically,
When refining stainless steel, while under normal atmospheric pressure to oxygen blowing in molten steel, it is blown into inert gas Ar gas, and past after refining
Nitrogen is blown into refining liquid.Inventors have found that being blown into oxygen and argon gas simultaneously into molten steel, it can reach false by reducing CO partial pressure
The effect of vacuum so that carbon content be made to drop to very low level, and inhibits the oxidation of chromium in steel.By the way that rare earth element is added,
Be conducive to desulfurizing and purifying molten steel, reduce the formability of MnS compound, improve the rigidity and corrosion resistance of stainless steel, simultaneously
It can make the strip MnS compound nodularization generated in steel, refinement and disperse branch, improve the impact resistance, resistance to of stainless steel
Room temperature and high temperature dot corrosive nature, and rare earth element can be sent out with low-melting impurities such as phosphorus, arsenic, antimony, bismuth, lead, copper in stainless steel
Raw reciprocation, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improves the intercrystalline corrosion of stainless steel
Energy.Nitrogen is controlled, the flow ratio of nitrogen and argon gas must be rationally controlled when restoring the refining reduction phase, molten steel is carried out
Nitrogen alloying.
According to one embodiment of present invention, the temperature of argon-oxygen-decarburizing process refining can be 1500-1700 degrees Celsius.Invention
People's discovery, argon-oxygen-decarburizing process refining temperature is too low to will cause that slag viscosity is excessive, unfavorable to the smelting and desulfurization of steel；Aod
The excessively high slag viscosity that will cause of method refining temperature is too small, and clinker, which can wash away, to be corroded furnace lining and reduce lining durability, and will cause
Alloying element excess scaling loss.
S300: refining liquid is sent to ladle refining furnace and is refined
In the step, refining liquid is sent to ladle refining furnace and is refined, to obtain the corrosion-resistant super Ovshinsky of modified
Body stainless steel.Inventors have found that refining liquid can realize that desulfurization, temperature are adjusted, while can be right by ladle refining furnace refining
Ingredient in refining liquid is accurately finely tuned, and the degree of purity of molten steel is improved, and realizes slag making.Specifically, refining liquid is in ladle essence
When being refined in refining LF furnace, FeO, MnO, Cr in graphite electrode and slag2O3Effect generates CO gas, increases the reproducibility of furnace gas.Except this
Except, graphite electrode also generates carbon monoxide with the oxygen effect in furnace, and the oxygen in furnace gas is prevented to transmit to metal.In addition,
LF furnace refine when can blowing argon gas molten metal is stirred, be conducive to steel --- the chemical reaction between slag, accelerate steel --- slag
Between substance transmitting, be conducive to the deoxidation of molten steel, the progress of desulphurization reaction.Argon stirring can also remove nonmetal inclusion
Object, accelerate molten steel in temperature and ingredient it is uniform, can accurately adjust complexity chemical composition.
According to one embodiment of present invention, the temperature of ladle refining LF furnace refining can be 1500-1650 degrees Celsius.Hair
Bright people's discovery, LF furnace refining temperature is excessively high, will increase the burden of electric arc furnaces furnace lining, damages electric furnace liner, increases iron loss；And
Too low LF furnace refining temperature to smoothly complete refining and casting it is unfavorable.
The method according to an embodiment of the present invention for preparing the corrosion-resistant super austenitic stainless steel of above-mentioned modified, is not added
Manganese element, and if stainless steel due to raw material or melting contain micro manganese element, control its content and be not more than
0.2wt% reduces influence of the MnS to stainless steel corrosion resistance to reduce the tendency of MnS field trash formation；By the way that vanadium is added
Element can replace manganese element to improve solubility of the nitrogen in stainless steel, guarantee sufficiently high nitrogen element content in stainless steel, simultaneously
Vanadium can play the role of refined crystalline strengthening, improve the intensity, toughness and high temperature creep property of stainless steel, and nitrogenize the disperse of vfanadium compound
Invigoration effect can further improve the corrosion resistance and high temperature creep property of stainless steel；And niobium can same chromium, vanadium phase interaction
With, solubility of the raising nitrogen in stainless steel, while niobium can form the NbC of high degree of dispersion with micro carbon, and it is strong to play fine grain
Change effect, improves the intensity of stainless steel, improves the elevated temperature strength and high-temperature corrosion-resistance performance of stainless steel, improve the high temperature of stainless steel
Military service performance；Rare earth element is conducive to desulfurizing and purifying molten steel, reduces the formability of MnS compound, improves the rigidity of stainless steel
And corrosion resistance, while the strip MnS compound nodularization generated in steel, refinement and disperse branch can be made, improve stainless
The impact resistance of steel, resistance to room temperature and high temperature dot corrosive nature, and rare earth element can in stainless steel phosphorus, arsenic, antimony, bismuth, lead,
Reciprocation occurs for the low-melting impurities such as copper, inhibits these elements segregation on crystal boundary, plays the role of purifying crystal boundary, improve not
The corrosion among crystalline grains of rust steel.As a result, the corrosion-resistant super austenitic stainless steel of the modified do not add manganese or manganese element content compared with
Low, nitrogen content is higher, and anti-room temperature and high temperature corrosion property are good, and intensity is higher, excellent combination property.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
It is smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；It will melt
Melt liquid and rare-earth yttrium and carry out argon-oxygen-decarburizing process refining under 1550 degrees Celsius, to obtain refining liquid；Refining liquid is sent to ladle
Refining furnace is refined under 1500 degrees Celsius, to obtain the corrosion-resistant super austenitic stainless steel of modified.The modified is resistance to
Corrode the ingredient of super austenitic stainless steel are as follows: carbon 0.015wt%, silicon 0.43wt%, manganese 0.1wt%, phosphorus 0.015wt%, sulphur
0.001wt%, chromium 21.5wt%, nickel 24.5wt%, molybdenum 6.2wt%, vanadium 2.8wt%, niobium 2.5wt%, nitrogen 0.24wt%, rare earth
Yttrium 0.05wt% and balance iron.The test of its properties and result see the table below 1:
The test of 1 embodiment of table, 1 stainless steel properties and result
Embodiment 2
It is smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；It will melt
Melt liquid and Rare Earth Lanthanum and carry out argon-oxygen-decarburizing process refining under 1620 degrees Celsius, to obtain refining liquid；Refining liquid is sent to ladle
Refining furnace is refined under 1520 degrees Celsius, to obtain the corrosion-resistant super austenitic stainless steel of modified.The modified is resistance to
Corrode the ingredient of super austenitic stainless steel are as follows: carbon 0.014wt%, silicon 0.42wt%, manganese 0.15wt%, phosphorus 0.015wt%, sulphur
0.001wt%, chromium 21.2wt%, nickel 24.2wt%, molybdenum 6.0wt%, vanadium 2.5wt%, niobium 2.5wt%, nitrogen 0.22wt%, lanthanum
0.03wt% and balance iron.Its properties is tested and the results are shown in Table 2:
The test of 2 embodiment of table, 2 stainless steel properties and result
Embodiment 3
It is smelted after ferrovanadium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；By molten liquid 1640
Argon-oxygen-decarburizing process refining is carried out under degree Celsius, to obtain refining liquid；Refining liquid is sent to ladle refining furnace at 1540 degrees Celsius
Under refined, to obtain the corrosion-resistant super austenitic stainless steel of modified.The corrosion-resistant super austenitic of the modified is stainless
The ingredient of steel are as follows: carbon 0.012wt%, silicon 0.46wt%, manganese 0.18wt%, phosphorus 0.011wt%, sulphur 0.001wt%, chromium
22wt%, nickel 25.0wt%, molybdenum 6.3wt%, vanadium 2.5wt%, nitrogen 0.20wt% and balance iron.The test of its properties and result
It is shown in Table 3:
The test of 3 embodiment of table, 3 stainless steel properties and result
Embodiment 4
It is smelted after ferrovanadium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；By molten liquid 1650
Argon-oxygen-decarburizing process refining is carried out under degree Celsius, to obtain refining liquid；Refining liquid is sent to ladle refining furnace at 1550 degrees Celsius
Under refined, to obtain the corrosion-resistant super austenitic stainless steel of modified.The corrosion-resistant super austenitic of certain modified is not
Become rusty steel ingredient are as follows: carbon 0.02wt%, silicon 0.4wt%, manganese 0.1wt%, phosphorus 0.015wt%, sulphur 0.001wt%, chromium 21wt%,
Nickel 24wt%, molybdenum 6.0wt%, vanadium 3wt%, nitrogen 0.24wt% and balance iron.Its properties is tested and the results are shown in Table 4:
The test of 4 embodiment of table, 4 stainless steel properties and result
Embodiment 5
It is smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；It will melt
Melt liquid and Rare Earth Lanthanum and carry out argon-oxygen-decarburizing process refining under 1660 degrees Celsius, to obtain refining liquid；Refining liquid is sent to ladle
Refining furnace is refined under 1650 degrees Celsius, to obtain the corrosion-resistant super austenitic stainless steel of modified.The modified is resistance to
Corrode the ingredient of super austenitic stainless steel are as follows: carbon 0.015wt%, silicon 0.4wt%, manganese 0.1wt%, phosphorus 0.015wt%, sulphur
0.002wt%, chromium 22wt%, nickel 24wt%, molybdenum 6.0wt%, vanadium 3wt%, niobium 3wt%, nitrogen 0.24wt%, lanthanum 0.07wt% and
Balance iron.Its properties is tested and the results are shown in Table 5:
The test of 5 embodiment of table, 5 stainless steel properties and result
Embodiment 6
It is smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；It will melt
Melt liquid and Rare Earth Lanthanum and cerium and carry out argon-oxygen-decarburizing process refining under 1680 degrees Celsius, to obtain refining liquid；By refining liquid send to
Ladle refining furnace is refined under 1600 degrees Celsius, to obtain the corrosion-resistant super austenitic stainless steel of modified.The improvement
The ingredient of the corrosion-resistant super austenitic stainless steel of type are as follows: carbon 0.015wt%, silicon 0.45wt%, manganese 0.1wt%, phosphorus
0.015wt%, sulphur 0.001wt%, chromium 22wt%, nickel 25wt%, molybdenum 6.0wt%, vanadium 2.5wt%, niobium 3wt%, nitrogen
0.25wt%, lanthanum 0.03wt%, cerium 0.05% and balance iron.Its properties is tested and the results are shown in Table 6:
The test of 6 embodiment of table, 6 stainless steel properties and result
Embodiment 7
It is smelted after ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum are mixed, to obtain molten liquid；It will melt
Melt liquid and Rare Earth Lanthanum, cerium and yttrium and carry out argon-oxygen-decarburizing process refining under 1600 degrees Celsius, to obtain refining liquid；Refining liquid is sent
It is refined under 1620 degrees Celsius to ladle refining furnace, to obtain the corrosion-resistant super austenitic stainless steel of modified.This changes
Into the ingredient of the corrosion-resistant super austenitic stainless steel of type are as follows: carbon 0.017wt%, silicon 0.5wt%, manganese 0.01wt%, phosphorus
0.012wt%, sulphur 0.0013wt%, chromium 21.6wt%, nickel 24.5wt%, molybdenum 6.0wt%, vanadium 2.7wt%, niobium 2.9wt%, nitrogen
0.25wt%, lanthanum 0.03wt%, cerium 0.02wt%, yttrium 0.02wt% and balance iron.Its properties is tested and the results are shown in Table 7:
The test of 7 embodiment of table, 7 stainless steel properties and result
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of corrosion-resistant super austenitic stainless steel of modified characterized by comprising
The carbon of 0.01~0.02 weight %；
The silicon of 0.4~0.6 weight %；
The manganese of 0~0.2 weight %；
The phosphorus of 0~0.02 weight %；
The sulphur of 0~0.01 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25.5 weight %；
The molybdenum of 6.0~7.0 weight %；
The vanadium of 1~3 weight %；
The niobium of 0~3 weight %；
The nitrogen of 0.20~0.25 weight %；
The rare earth element of 0~0.1 weight %；And
The iron of surplus.
2. stainless steel according to claim 1, which is characterized in that the rare earth element be in lanthanum, cerium and yttrium extremely
It is one of few.
3. stainless steel according to claim 1 or 2 characterized by comprising
The carbon of 0.015~0.02 weight %；
The silicon of 0.4~0.5 weight %；
The manganese of 0~0.1 weight %；
The phosphorus of 0~0.015 weight %；
The sulphur of 0~0.002 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25 weight %；
The molybdenum of 6.0~6.5 weight %；
The vanadium of 2~3 weight %；
The nitrogen of 0.24~0.25 weight %；And
The iron of surplus.
4. stainless steel according to claim 1 characterized by comprising
The carbon of 0.015~0.02 weight %；
The silicon of 0.4~0.5 weight %；
The manganese of 0~0.1 weight %；
The phosphorus of 0~0.015 weight %；
The sulphur of 0~0.002 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25 weight %；
The molybdenum of 6.0~6.5 weight %；
The vanadium of 2~3 weight %；
The niobium of 1~3 weight %；
The nitrogen of 0.24~0.25 weight %；
The rare earth element of 0~0.1 weight %；And
The iron of surplus.
5. stainless steel according to claim 1 characterized by comprising
The carbon of 0.015~0.02 weight %；
The silicon of 0.4~0.5 weight %；
The manganese of 0~0.1 weight %；
The phosphorus of 0~0.015 weight %；
The sulphur of 0~0.002 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25 weight %；
The molybdenum of 6.0~6.5 weight %；
The vanadium of 2~3 weight %；
The niobium of 1~3 weight %；
The nitrogen of 0.24~0.25 weight %；
Lanthanum, cerium or the yttrium of 0~0.1 weight %；And
The iron of surplus.
6. stainless steel according to claim 1 characterized by comprising
The carbon of 0.015~0.02 weight %；
The silicon of 0.4~0.5 weight %；
The manganese of 0~0.1 weight %；
The phosphorus of 0~0.015 weight %；
The sulphur of 0~0.002 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25 weight %；
The molybdenum of 6.0~6.5 weight %；
The vanadium of 2~3 weight %；
The niobium of 1~3 weight %；
The nitrogen of 0.24~0.25 weight %；
The lanthanum and cerium summation of 0~0.1 weight %；And
The iron of surplus.
7. stainless steel according to claim 1 characterized by comprising
The carbon of 0.015~0.02 weight %；
The silicon of 0.4~0.5 weight %；
The manganese of 0~0.1 weight %；
The phosphorus of 0~0.015 weight %；
The sulphur of 0~0.002 weight %；
The chromium of 21~22 weight %；
The nickel of 24~25 weight %；
The molybdenum of 6.0~6.5 weight %；
The vanadium of 2~3 weight %；
The niobium of 1~3 weight %；
The nitrogen of 0.24~0.25 weight %；
Lanthanum, cerium and the yttrium summation of 0~0.1 weight %；And
The iron of surplus.
8. a kind of method for preparing stainless steel of any of claims 1-7 characterized by comprising
(1) it is smelted after mixing ferrovanadium, ferroniobium, molten iron, nickel, chromium and molybdenum, to obtain molten liquid；
(2) molten liquid and rare earth element are subjected to argon-oxygen-decarburizing process refining, to obtain refining liquid；
(3) refining liquid is sent to ladle refining furnace and is refined, to obtain the corrosion-resistant super austenitic of the modified
Stainless steel.
9. according to the method described in claim 8, it is characterized in that, the temperature of the refining is 1500- in step (2)
1700 degrees Celsius.
10. method according to claim 8 or claim 9, which is characterized in that in step (3), the temperature of the refining is
1500-1650 degrees Celsius.
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