CN1187467C - Two-phase stainless steel - Google Patents
Two-phase stainless steel Download PDFInfo
- Publication number
- CN1187467C CN1187467C CNB021451729A CN02145172A CN1187467C CN 1187467 C CN1187467 C CN 1187467C CN B021451729 A CNB021451729 A CN B021451729A CN 02145172 A CN02145172 A CN 02145172A CN 1187467 C CN1187467 C CN 1187467C
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- China
- Prior art keywords
- stainless steel
- phase stainless
- corrosion
- duplex stainless
- chromium
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- 229910001220 stainless steel Inorganic materials 0.000 title abstract description 15
- 239000010935 stainless steel Substances 0.000 title abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 6
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 11
- 239000002253 acid Substances 0.000 abstract description 4
- -1 chlorine ions Chemical class 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 10
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000011651 chromium Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 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 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910000604 Ferrochrome Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 108010038629 Molybdoferredoxin Proteins 0.000 description 1
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000023753 dehiscence Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to a two-phase stainless steel comprising the following components, in weight percentages, 0.01 to 0.12% of C, 4.0 to 8.0 % of Mn, 12.0 to 25.0% of Cr, 0.20 to 1.5% of Al, 0.5 to 3.0% of Ni, 0.4 to 3.0% of Mo, at most 1.0% of Cu, 0.2 to 2.5% of Si, 0.05 to 0.3% of N, 0.02 to 0.05% of Re, at most 0.03% of S, at most 0.035% of P and balance of Fe. The two-phase stainless steel resists alkali and acid corrosion and has the advantages of strong stress corrosion cracking resistance, crevice corrosion resistance and air bubble corrosion resistance capability especially under the condition of resisting chlorine ions and in oxidized acid media, high intensity, high toughness, favorable cold and hot processing performance and low cost.
Description
Technology neck city
The present invention relates to a kind of stainless steel.
Background technology
In decades, domestic and international most popular stainless steel is a nickel chromium stainless steel, and wherein the consumption maximum is austenilic Ni-Cr stainless steel.Since finding and use duplex stainless steel the thirties in 20th century,, begun to obtain the attention of scientific and technological circle and industry member and accelerated development in the eighties with its good anti-pitting and stress corrosion crack performance.So far become and one of ferrite, Austenitic stainless steel three major types stainless steel arranged side by side.China's duplex stainless steel that begun one's study since the seventies in 20th century, existing so far and external corresponding several trades mark are for road has been opened up in the development and the application of China's duplex stainless steel.But these duplex stainless steels all are nickel chromium stainless steels.Because the ground ore reserve of nickel and chromium element are relative less, produce the cost costliness.For this reason, scientific and technical personnel for nickel, have made some iron, manganese, aluminium alloy and iron-manganese-aluminium-chromium austenite stainless steel with aluminium for chromium with manganese according to the similarity of manganese and nickel, aluminium and chromium pantogen minor structure and physicals.But these iron-manganese-aluminium-chromium austenite stainless steel all have acid resistance poor, the shortcoming of the thick and column crystal prosperity of crystal grain, and influenced their use properties and range of application.
Summary of the invention
The purpose of this invention is to provide a kind of excellent performance is the duplex stainless steel of main added elements with manganese, chromium, aluminium.
Duplex stainless steel provided by the invention, its chemical ingredients and each component content (weight %) are as follows: 0～0.12%C, 4.0～8.0%Mn, 12.0～25.0%Cr, 0.20～1.5%Al, 0.5～3.0%Ni, 0.4～3.0%Mo, 0～1.0%Cu, 0.2～2.5%Si, 0.05～0.3%N, 0.02～0.05%Re ,≤0.03%S ,≤0.035%P, surplus Fe.
Each composition preferred content (weight %) is:
0～0.06%C, 5.0～8.0%Mn, 16.0～22.0%Cr, 0.2～1.2%Al, 1.0～3.0%Ni, 0.4～2.0%Mo, 0～1.0%Cu, 0.8～1.0%Si, 0.05～0.2%N, 0.02～0.04%Re ,≤0.03%S ,≤0.035%P, surplus Fe.
Duplex stainless steel of the present invention has the following advantages:
1, has stronger acid-alkali-corrosive-resisting performance.Especially at highly basic (as NaOH), chlor-alkali (NH
4Cl), oxidizing acid is (as HNO
3), stress corrosion dehiscence resistant, anti-general corrosion, intergranular corrosion resistance and anti-spot corrosion, cavitation corrosion in seawater in the solution such as Sodium Thiocyanate 99 and phosphoric acid salt have obvious superiority;
2, intensity height, good toughness, anti-corrosion wear are excellent.Yield strength б s doubles above greater than 450Mpa than austenitic stainless steel OCr18Ni9 commonly used (304), 00Cr17Ni12Mo2Ti (316L).Simultaneously, also higher than 00Cr18-Mo type and 00Cr22-Mo type nickel chromium triangle duplex stainless steel.Breakdown point (б b) is greater than 800MPa, and is for 1.5 times of chromium-nickel austenitic stainless steel 304 commonly used, 316L, also high more than 20% than 00Cr18-Mo type and 00Cr22-Mo type nickel chromium triangle duplex stainless steel.Impelling strength (a
k) 〉=120J is all higher more than 20% than above-mentioned nickel chromium stainless steel.Unit elongation (δ
5) 〉=25% is suitable with 00Cr22-Mo type nickel chromium triangle duplex stainless steel.Good comprehensive mechanical property and solidity to corrosion make duplex stainless steel of the present invention more much higher than the anti-corrosion wear ability of nickel chromium triangle duplex stainless steel.In using, petrochemical complex, salt chemical engineering and phosphorous chemical industry field more show its superiority.
3, the component prescription of uniqueness of the present invention makes it at room temperature have ferrite with suitable processing and respectively accounts for 35～65% ratio mutually with austenite, and crystal grain is tiny, the nonmetallic impurity rareness, and the tissue that crystal boundary purifies has guaranteed above-mentioned high-performance.
4, the stainless starting material of melting the present invention adopt ordinary scrap steel, industrial electrolysis manganese, and the aluminium scrap cable, humble carbon ferrochrome, the source is sufficient, and is cheap, and cost reduces by 20～50% than 18～8 nickel chromium stainless steels and 00Cr22-Mo type duplex stainless steel.
Embodiment
Embodiment:
Duplex stainless steel of the present invention is starting material with steel scrap (08F), industrial electrolysis manganese, nitrided ferro-chromium, molybdenum-iron, aluminium scrap cable and useless nickel chromium stainless steel.Its composition (weight %) is≤0.04%C, 5.0～8.0%Mn, 20.0～22.0%Cr, 0.6～1.2%Al, 1.5%Ni, 0.8～1.5%Mo, 0.8～1.0%Cu, 0.8～1.0%Si, 0.05～0.1%N, 0.02%Re ,≤0.03%S ,≤0.035%p, all the other are Fe.By this composition with starting material batching baking dehumidifying back ingot casting after the melting in medium-frequency induction furnace or electric arc furnace.Quality product requires can carry out AOD refining or esr when high.Solid solubility temperature is 980 ℃-1080 ℃, in good time insulation back air cooling or water-cooled.Duplex stainless steel of the present invention can be cast or rolling becoming a useful person as required, or forges into base in 1150 ℃ of-850 ℃ of temperature ranges.Then through being machined into part.
Ferrite austenite duplex stainless steel of the present invention can be widely used in fields such as oil, chemical industry, shipbuilding, building, vehicle, papermaking, printing and dyeing, pharmacy, food, people's livelihood apparatus.
Claims (2)
1, a kind of duplex stainless steel is characterized in that its chemical ingredients and each component content (weight %) are as follows:
0～0.12％C、4.0～8.0％Mn、12.0～25.0％Cr、0.20～1.5％Al、0.5～3.0％Ni、
0.4～3.0％Mo、0～1.0％Cu、0.2～2.5％Si、0.05～0.3％N、0.02～0.05％Re、
≤ 0.03%S ,≤0.035%P, surplus Fe.
2, by the described duplex stainless steel of claim 1, it is characterized in that each component content (weight %) is:
0～0.06％C、5.0～8.0％Mn、16.0～22.0％Cr、0.2～1.2％Al、1.0～3.0％Ni、
0.4～2.0％Mo、0～1.0％Cu、0.8～1.0％Si、0.05～0.2％N、0.02～0.04％Re、
≤ 0.03%S ,≤0.035%P, surplus Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021451729A CN1187467C (en) | 2002-11-08 | 2002-11-08 | Two-phase stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021451729A CN1187467C (en) | 2002-11-08 | 2002-11-08 | Two-phase stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1412337A CN1412337A (en) | 2003-04-23 |
| CN1187467C true CN1187467C (en) | 2005-02-02 |
Family
ID=4750795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021451729A Expired - Fee Related CN1187467C (en) | 2002-11-08 | 2002-11-08 | Two-phase stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1187467C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432262C (en) * | 2006-07-21 | 2008-11-12 | 上海大学 | Rare earth-containing high-nitrogen ultralow-nickel super-duplex stainless steel alloy materials and method for preparing same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457951C (en) * | 2006-09-21 | 2009-02-04 | 上海大学 | High-nitrogen nickel-free bidirectional stainless steel alloy material and manufacture method thereof |
| CN101215674B (en) * | 2008-01-08 | 2010-11-03 | 上海大学 | Economical diphase stainless steel alloy material and preparation method thereof |
| CN101812647B (en) * | 2009-02-25 | 2012-10-10 | 宝山钢铁股份有限公司 | Diphase stainless steel and manufacturing method thereof |
| CN101942611B (en) * | 2010-03-22 | 2012-07-25 | 临沭县华盛化工有限公司 | Alloy pump for conveying chlorine-containing mixed acid liquid |
| CN102660663B (en) * | 2012-05-29 | 2013-12-11 | 天津市东瑞钢铁铸造有限公司 | Method for smelting super third-generation double-phase stainless steel by using intermediate frequency furnace |
| IN2014DN10355A (en) * | 2012-06-22 | 2015-08-07 | Nippon Steel & Sumitomo Metal Corp | |
| CN103060717A (en) * | 2013-01-12 | 2013-04-24 | 上海大学 | Chromium-saved duplex stainless steel with phase-change plasticization effect and preparation method of chromium-saved duplex stainless steel with phase-change plasticization effect |
-
2002
- 2002-11-08 CN CNB021451729A patent/CN1187467C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432262C (en) * | 2006-07-21 | 2008-11-12 | 上海大学 | Rare earth-containing high-nitrogen ultralow-nickel super-duplex stainless steel alloy materials and method for preparing same |
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| Publication number | Publication date |
|---|---|
| CN1412337A (en) | 2003-04-23 |
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