CN109576605A - A kind of magnetism-free stainless steel and its production method for ocean engineering - Google Patents
A kind of magnetism-free stainless steel and its production method for ocean engineering Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 47
- 239000010935 stainless steel Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000005242 forging Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 15
- 238000007670 refining Methods 0.000 claims abstract description 15
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 12
- 238000010891 electric arc Methods 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 61
- 239000010959 steel Substances 0.000 claims description 61
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 23
- 238000003723 Smelting Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 238000005262 decarbonization Methods 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 241001062472 Stokellia anisodon Species 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000013535 sea water Substances 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 3
- 239000011572 manganese Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Classifications
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of magnetism-free stainless steels and its production method for ocean engineering, magnetism-free stainless steel includes following weight percentage components: C < 0.03%, Mn 9%-12%, Cr 19%-24%, Ni 5.5%-7.5%, Mo 2.5%-3.5%, N 0.4%-0.6%, Si < 1%, S < 0.01%, P < 0.015%, remaining is Fe；Its production method includes raw material being purified and being cleaned burner hearth and ladle, and raw material are successively smelted being placed in electric arc furnaces, vacuum refining furnace, electroslag refining furnace, are forged using FM forging method, solution heat treatment, cryogenic forging is cold work reinforced.The invention has the advantages that magnetism-free stainless steel has good Seawater durability, good welding performance, magnetic conductivity is low, and production cost is low, can be effectively used in ocean engineering.
Description
Technical field
The invention belongs to stainless steel metallurgical technology fields, and in particular to a kind of magnetism-free stainless steel for ocean engineering and its
Production method.
Background technique
With the development of ocean engineering technology, ocean engineering to the high-performance magnetism-free stainless steel demand of seawater corrosion resistance compared with
Greatly, existing magnetism-free stainless steel manufacturing process is complex, and cost is also higher.Marine Engineering Steel main feature sea water resistance is rotten
Erosion, have following physicochemical properties: Ultra-low carbon, carbon content is less than 0.03%；The equivalent of resistance to spot corrosion meets PER=%Cr+3.3%
The requirement of Mo+16N > 30；Non-metallic inclusion content is lower than 4 grades；Material internal gas content is low, and wherein hydrogen content is less than
1.6ppm, oxygen content are less than≤20ppm.It is nonmetallic that seawater can infiltrate into oxide, sulfide inside magnetism-free stainless steel etc.
Spot corrosion is generated in field trash and gas, and then develops into crevice corrosion, crackle and breakage problem.Therefore, it is necessary to stringent controls
Constituent content inside magnetism-free stainless steel, it is also necessary to which manufacturing process is improved.
Summary of the invention
According to the deficiencies of the prior art described above, It is an object of the present invention to provide a kind of for ocean engineering without magnetic not
Rust steel and its production method, the magnetism-free stainless steel expand austenite phase by substitute nickel with manganese, control carbon content and spot corrosion equivalent, together
When the production technology of magnetism-free stainless steel is improved so that magnetism-free stainless steel can satisfy the performance requirement of ocean engineering.
The object of the invention realization is completed by following technical scheme:
A kind of magnetism-free stainless steel for ocean engineering, which is characterized in that comprising following weight percentage components: C <
0.03%, Mn 9%-12%, Cr 19%-24%, Ni 5.5%-7.5%, Mo 2.5%-3.5%, N 0.4%-0.6%, Si < 1%, S <
0.01%, P < 0.015%, remaining is Fe.
Comprising following weight percentage components: C 0.027%, Mn 11.2%, Cr 22.5%, Ni 7.2%, Mo 3.1%, N
0.51%, Si 0.6%, S 0.008%, P 0.01%, remaining is Fe.
It is a kind of to be related to the production method of any magnetism-free stainless steel for ocean engineering, which is characterized in that including
Following steps:
Step 1, by raw material purified treatment, and burner hearth and ladle are cleaned；
Step 2, the raw material electric arc furnaces, vacuum refining furnace, electroslag refining furnace is sequentially placed into smelt to obtain steel ingot；
Step 3, FM forging method is used to forge to generate forging the steel ingot；
Step 4, solution heat treatment, cryogenic forging and cold work reinforced to generate the magnetism-free stainless steel are carried out to the forging.
The raw material include nickel plate, chromic carbide iron alloy, metal molybdenum filament, steel scrap.
In the smelting process of the electric arc furnaces of the step 2, deoxidier is added, and after the later period heat of oxidation, reduction period
The molten steel in the electric arc furnaces is carried out before phase, tapping to take off Slag treatment；The deoxidier includes the component of following weight percent:
C < 0.45%, Mn 20-21%, Si 8-9%, Al 4-4.5%, Ca 4-5%, remaining be Fe.
In the smelting process of the vacuum refining furnace of the step 2, the C content in molten steel is reduced using decarbonization process
To 0.03% hereinafter, hydrogen content is reduced to 1.6ppm or less using degasification technique and oxygen content is reduced to 20ppm or less.
In the step 2, molten steel is poured to preheating temperature after vacuum refining furnace smelting and is greater than 80 DEG C of die cavity
To generate billet, it is placed in after the billet of polishing in the electroslag refining furnace and carries out electroslag remelting to obtain the steel ingot.
The step 3 heats the steel ingot the following steps are included: the steel ingot of polishing, using FM forging method to the steel
Ingot is forged, and 1170 DEG C -1190 DEG C of initial forging temperature, final forging temperature is 890 DEG C -910 DEG C, and forging ratio is air-cooled after forging greater than 3
It handles and removes surface defect.
During heating the steel ingot, the steel ingot is lower than 250 DEG C into furnace temperature, and in-furnace temperature is 20 DEG C -560 DEG C
When, it is heated up per hour less than 50 DEG C；When in-furnace temperature is 560-850 DEG C, heat up 60 DEG C -100 DEG C per hour；In-furnace temperature is
It at 850 DEG C -1200 DEG C, heats up 100 DEG C -130 DEG C per hour, when stopping heating up and keeping the temperature default when in-furnace temperature is 1200 DEG C
Long, steel ingot bottom in furnace is padded and is turned over by middle part.
Solid solubility temperature is 1040 DEG C -1060 DEG C in solution heat treatment, and the temperature of cryogenic forging is 620-700 DEG C and controls institute
The enhanced deformation amount for stating magnetism-free stainless steel is 12%-14%.
The invention has the advantages that magnetism-free stainless steel has good Seawater durability, good welding performance, magnetic conductivity
Low, production cost is low, can be effectively used in ocean engineering.
Specific embodiment
Feature of the invention and other correlated characteristics are described in further detail by the following examples, in order to go together
The understanding of industry technical staff:
Embodiment one: the present embodiment be specifically related to a kind of magnetism-free stainless steel and its manufacturing method for ocean engineering, by with
Manganese expands austenite phase for nickel, controls carbon content and spot corrosion equivalent, while improving to the production technology of magnetism-free stainless steel, makes
Obtaining magnetism-free stainless steel can satisfy the demand of ocean engineering.
The ingredient that the magnetism-free stainless steel for ocean engineering in the present embodiment is formed comprising following weight percent: less than
The N of Mo, 0.4%-0.6% of Ni, 2.5%-3.5% of Cr, 5.5%-7.5% of Mn, 19%-24% of 0.03% C, 9%-12%, it is less than
1% Si, the S less than 0.01%, the P less than 0.015%, remaining is Fe.The spot corrosion equivalent of above-mentioned magnetism-free stainless steel expires PER
=%Cr+3.3%Mo+16N >=30.Substitute nickel with manganese expands austenite phase, and Mn content is increased to 10.0%, nickel content is reduced
To 6%, substitute nickel with manganese reduces production cost.By intensified element in above-mentioned magnetism-free stainless steel: Mn, Mo, N capping；It will modeling
Property, toughness element: Si, Cr, Ni take the middle upper limit；The content of S, P are reduced, S is lower than 0.015% lower than 0.010%, P, strict control
Harmful element, wherein control Pb+Sn+AsSb+Bi≤0.05%.
The production method of magnetism-free stainless steel in the present embodiment, comprising the following steps: step 1 by raw material purified treatment,
And clean burner hearth and ladle；Step 2 successively smelts raw material being placed in electric arc furnaces, vacuum refining furnace, electroslag refining furnace
To obtain steel ingot；Step 3 uses FM forging method to forge to obtain forging steel ingot；Step 4 carries out solution heat treatment to forging
Reason, cryogenic forging and cold work reinforced to generate magnetism-free stainless steel.
In the present embodiment, raw material are nickel plate, chromic carbide iron alloy, metal molybdenum filament, steel scrap.Above-mentioned steel scrap is no mud
It is husky, without iron rust, the steel scrap without greasy, pollution-free block.Reduce what impurity in smelting process took out by the screening to raw material
Difficulty improves the performance for smelting obtained magnetism-free stainless steel.
In step 1, successively cleans raw material using dilute sulfuric acid and clear water in raw material purified treatment and dry.Dilute sulphur
The concentration of acid is 5-7%, iron rust on raw material, silt particle, greasy is cleaned by dilute sulfuric acid, then will be residual on raw material by clear water
The laggard furnace melting of moisture removal is gone in the sour juice removal stayed, drying.There is remaining molten steel to adhere on the surface of burner hearth and ladle, remaining steel
There are various elements, such as Co, W, Pb, Sn, As, Bi in water, to prevent the influence of trace harmful elements need to be to burner hearth and ladle
It is cleaned.Using the melting 2-3 furnace in burner hearth and ladle and non-magnetic rustproof steel chemical composition in burner hearth and ladle cleaning
Close steel grade is taken away the remaining molten steel on hearth wall, steel ladle by molten steel after melting.It is above-mentioned with magnetism-free stainless steel chemistry at
The nearly steel grade of split-phase includes but is not limited to 304L and 316L.
In the smelting process of the electric arc furnaces of step 2, deoxidier is added, and before the later period heat of oxidation, reduction period later period, tapping
Molten steel in electric arc furnaces is carried out to take off Slag treatment；The component of deoxidier are as follows: Mn, 8-9%'s of C, 20-21% less than 0.45%
The Ca of Al, 4-5% of Si, 4-4.5%, remaining be Fe.During arc melting will deoxidier be added furnace in, make deoxidier with
Oxide, sulfide form steel slag through combination reaction in molten steel, float on molten steel surface, remove steel slag in three times, remove nonmetallic
Field trash purifies molten steel, makes non-metallic inclusion A+B+C+D≤4 grade in molten steel.
In the smelting process of the vacuum refining furnace of step 2, the carbon content in molten steel is reduced to 0.03% using decarbonization process
Hereinafter, hydrogen content is reduced to 1.6ppm or less using degasification technique and oxygen content is reduced to 20ppm or less.In vacuum fine
Molten steel is poured into the die cavity to preheating temperature greater than 80 DEG C to obtain billet, to merging electroslag weight after billet polishing after furnace smelting
Electroslag remelting is carried out in smelting furnace to obtain the steel ingot to homogenize.
Step 3 removes defect the following steps are included: finishing polishing steel ingot, and surface of steel ingot is polished to white, heating steel ingot,
Steel ingot is forged using FM forging method, 1170 DEG C -1190 DEG C of initial forging temperature, final forging temperature is 890 DEG C -910 DEG C, forging ratio
It is air-cooled after forging to handle and remove surface defect greater than 3.During heating steel ingot, steel ingot is lower than 250 DEG C into furnace temperature,
When in-furnace temperature is 20 DEG C -560 DEG C, heated up per hour less than 50 DEG C；When in-furnace temperature is 560-850 DEG C, 60 are heated up per hour
℃-100℃；It when in-furnace temperature is 850 DEG C -1200 DEG C, heats up 100 DEG C -130 DEG C per hour, in-furnace temperature stops when being 1200 DEG C
It only heats up and keeps the temperature preset duration.It is 1 hour a length of when the heat preservation duration of heat preservation and the dimension relationship of steel ingot, every 2 ".By filling
Code insurance temperature so that internal temperature reaches surface temperature, then carries out subsequent forging operation.In heating process, steel ingot bottom in furnace
Portion is padded and is turned over by middle part, keeps the temperature of steel ingot above and below uniform.
In step 4, to solution heat treatment after forging progress ultrasonic examination confirmation flawless, solution heat treatment is selected enough
Big pool, the solid solubility temperature of solution heat treatment are 1040 DEG C -1060 DEG C, and above-mentioned treatment process uses recirculated water or air blower drum
Wind, meanwhile, the upper and lower left and right swing of forging accelerates cooling.The temperature of cryogenic forging is 620-700 DEG C and controls magnetism-free stainless steel
Enhanced deformation amount be 12%-14%, further increase obdurability.To obtain it anti-for actual measurement under 20 DEG C of room temperature after forging cryogenic forging
Tensile strength Rm is greater than 650Mpa, yield strength RP0.2It is greater than 35% greater than 400Mpa, elongation percentage A.
It in the present embodiment, is surveyed using the magnetism-free stainless steel that aforementioned production method obtains, obtains inspection shown in following table
Survey result:
The present embodiment has the advantages that magnetism-free stainless steel has good Seawater durability, good welding performance, magnetic conductivity
Low, production cost is low, can be effectively used in ocean engineering.
Embodiment two: a kind of magnetism-free stainless steel for ocean engineering involved in the present embodiment uses in embodiment one
The production method of magnetism-free stainless steel obtains.Magnetism-free stainless steel in the present embodiment includes the ingredient of following weight percent composition:
0.027% C, 11.2% Mn, 22.5% Cr, 7.2% Ni, 3.1% Mo, 0.51% N, 0.6% Si, 0.008% S,
0.01% P.The spot corrosion equivalent PER=%Cr+3.3%Mo+16N=22.5+10.23+8.16=of above-mentioned magnetism-free stainless steel
40.89≥30。
Claims (10)
1. a kind of magnetism-free stainless steel for ocean engineering, which is characterized in that comprising following weight percentage components: C <
0.03%, Mn 9%-12%, Cr 19%-24%, Ni 5.5%-7.5%, Mo 2.5%-3.5%, N 0.4%-0.6%, Si < 1%, S <
0.01%, P < 0.015%, remaining is Fe.
2. a kind of magnetism-free stainless steel for ocean engineering according to claim 1, which is characterized in that include following weight
The component of percentage: C 0.027%, Mn 11.2%, Cr 22.5%, Ni 7.2%, Mo 3.1%, N 0.51%, Si 0.6%, S
0.008%, P 0.01%, remaining is Fe.
3. a kind of be related to the production method of any magnetism-free stainless steel for ocean engineering in claim 1-2, spy
Sign is, comprising the following steps:
Step 1, by raw material purified treatment, and burner hearth and ladle are cleaned；
Step 2, the raw material electric arc furnaces, vacuum refining furnace, electroslag refining furnace is sequentially placed into smelt to obtain steel ingot；
Step 3, FM forging method is used to forge to generate forging the steel ingot；
Step 4, solution heat treatment, cryogenic forging and cold work reinforced to generate the magnetism-free stainless steel are carried out to the forging.
4. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 3, which is characterized in that institute
Stating raw material includes nickel plate, chromic carbide iron alloy, metal molybdenum filament, steel scrap.
5. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 3, which is characterized in that institute
It states in the smelting process of the electric arc furnaces of step 2, deoxidier is added, and right before the later period heat of oxidation, reduction period later period, tapping
Molten steel in the electric arc furnaces carries out taking off Slag treatment；The deoxidier includes the component of following weight percent: C < 0.45%,
Mn 20-21%, Si 8-9%, Al 4-4.5%, Ca 4-5%, remaining be Fe.
6. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 3, which is characterized in that institute
State in the smelting process of the vacuum refining furnace of step 2, use decarbonization process by the C content in molten steel be reduced to 0.03% with
Under, hydrogen content is reduced to by 1.6ppm or less using degasification technique and oxygen content is reduced to 20ppm or less.
7. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 3, which is characterized in that institute
It states in step 2, pours molten steel to preheating temperature greater than 80 DEG C of die cavity to generate billet after vacuum refining furnace smelting,
It polishes to be placed in after the billet in the electroslag refining furnace and carries out electroslag remelting to obtain the steel ingot.
8. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 3, which is characterized in that institute
Step 3 is stated the following steps are included: the steel ingot of polishing, heats the steel ingot, the steel ingot is forged using FM forging method,
1170 DEG C -1190 DEG C of initial forging temperature, final forging temperature is 890 DEG C -910 DEG C, and forging ratio is greater than 3, air-cooled processing and is removed after forging
Surface defect.
9. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 8, which is characterized in that add
During the heat steel ingot, the steel ingot is lower than 250 DEG C into furnace temperature, when in-furnace temperature is 20 DEG C -560 DEG C, per hour
Heating is less than 50 DEG C；When in-furnace temperature is 560-850 DEG C, heat up 60 DEG C -100 DEG C per hour；In-furnace temperature is 850 DEG C -1200
DEG C when, per hour heat up 100 DEG C -130 DEG C, in-furnace temperature be 1200 DEG C when stop heat up and keep the temperature preset duration, the steel ingot
Bottom is padded in furnace and is turned over by middle part.
10. a kind of production method of magnetism-free stainless steel for ocean engineering according to claim 3, which is characterized in that
Solid solubility temperature is 1040 DEG C -1060 DEG C in solution heat treatment, and the temperature of cryogenic forging is 620-700 DEG C and controls the no magnetic not
The enhanced deformation amount of rust steel is 12%-14%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266283A (en) * | 2013-05-17 | 2013-08-28 | 江苏星火特钢有限公司 | Non-magnetic stainless steel for ore selection equipment |
| CN105441780A (en) * | 2015-11-25 | 2016-03-30 | 上海加宁新技术研究所 | Method for manufacturing large motor 1Mn18Cr18N nonmagnetic guard ring |
| CN107130175A (en) * | 2017-06-23 | 2017-09-05 | 上海材料研究所 | A kind of high-strength corrosion-resisting magnetism-free stainless steel and preparation method thereof |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266283A (en) * | 2013-05-17 | 2013-08-28 | 江苏星火特钢有限公司 | Non-magnetic stainless steel for ore selection equipment |
| CN105441780A (en) * | 2015-11-25 | 2016-03-30 | 上海加宁新技术研究所 | Method for manufacturing large motor 1Mn18Cr18N nonmagnetic guard ring |
| CN107130175A (en) * | 2017-06-23 | 2017-09-05 | 上海材料研究所 | A kind of high-strength corrosion-resisting magnetism-free stainless steel and preparation method thereof |
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Application publication date: 20190405 |