EP0818552B1 - Rostfreie ferritisch-austenitische Gussstahllegierung - Google Patents
Rostfreie ferritisch-austenitische Gussstahllegierung Download PDFInfo
- Publication number
- EP0818552B1 EP0818552B1 EP97111887A EP97111887A EP0818552B1 EP 0818552 B1 EP0818552 B1 EP 0818552B1 EP 97111887 A EP97111887 A EP 97111887A EP 97111887 A EP97111887 A EP 97111887A EP 0818552 B1 EP0818552 B1 EP 0818552B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vanadium
- niobium
- ferritic
- tantalum
- tungsten
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910045601 alloy Inorganic materials 0.000 title claims description 24
- 239000000956 alloy Substances 0.000 title claims description 24
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims 2
- 238000005266 casting Methods 0.000 title 1
- 230000007797 corrosion Effects 0.000 claims description 14
- 238000005260 corrosion Methods 0.000 claims description 14
- 239000010955 niobium Substances 0.000 claims description 13
- 229910052720 vanadium Inorganic materials 0.000 claims description 12
- 229910052758 niobium Inorganic materials 0.000 claims description 11
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052715 tantalum Inorganic materials 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- LJAOOBNHPFKCDR-UHFFFAOYSA-K chromium(3+) trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Cl-].[Cr+3] LJAOOBNHPFKCDR-UHFFFAOYSA-K 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 229910052748 manganese Inorganic materials 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 229910001208 Crucible steel Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 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 2
- 239000010959 steel Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
Images
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
- C22C38/001—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
- C22C38/18—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
Definitions
- the invention relates to the use of objects made of a stainless ferritic-austenitic Chromium-nickel steel alloy with small amounts of coordinated Contain further alloying agents, a structure that is 50 vol .-% Delta ferrite as the basic structure with finely divided austenite as the rest gives the duplex steel alloys have good corrosion resistance and high Strength.
- Duplex alloys of this type are known per se. This is how the European describes Patent Specification 0 220 141 a stainless, high nitrogen-containing duplex wrought alloy with high corrosion resistance and structural stability, the maximum 0.05% carbon, 23 to 27% chromium, 5.5 to 9% nickel, 0.25 to 0.40% nitrogen, at most 0.8% silicon, at most 1.2% manganese, 3.5 to 4.9% Molybdenum, at most 0.5% copper, at most 0.5% tungsten, at most 0.010 % Sulfur, up to 0.5% vanadium and up to 0.18% cerium, balance including smelting contaminants contains iron; their levels Alloy elements within the specified salary limits in certain Are coordinated.
- This alloy requires solution annealing at about 1075 ° C to adjust the structure to a ferrite content of 30 to 55%; it is suitable for solution-annealed, cold-formed and also welded Condition especially for use in a chloride environment.
- European Patent 0 156 778 describes a corrosion-resistant, stainless ferritic-austenitic duplex steel alloy known.
- the invention is based on the problem of corrosion resistance and To further improve the strength of this type of cast steel alloy.
- the invention proposes use according to claim 1.
- the steel to be used according to the invention preferably contains at least 0.1% better still at least 0.2% tungsten, vanadium, niobium and tantalum individually or side by side.
- the tungsten content can also be above 0.5%, for example at 0.55% or also at 0.6%.
- the total content can Tungsten and tantalum are 0.05 to 0.80%.
- Table II below shows the critical pitting temperature limit of test alloys 1 and 2 in the test described above according to ASTM G 48-76.
- the critical temperatures (T k ) determined in this case are considerably higher in comparison with commercially available cast steel alloys; they are compared to the respective PREN values of the individual alloys.
- compositions of the heart mixtures cast or kneaded alloys A to E on which the diagram in FIG. 1 is based are shown in Table III below.
- Alloy (%) A B C D e C 0.03 0.03 0.03 - - Si 0.35 0.31 0.20 - - Mn 0.75 0.54 0.80 - - P 0.019 0.031 0,012 - - S 0.005 0.011 0,002 - - Cr 25.5 27.2 27.4 25.0 27 Mo 4.1 3.1 3.1 3.0 3.1 Ni 7.0 8.3 8.0 5.5 8th Cu 0.24 2.71 2.51 1.7 1.0 V - - - - - W - - - - N 0.27 0.23 0.24 0.18 0.22 Nb - - - - - - - Fe rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19628350 | 1996-07-13 | ||
| DE19628350A DE19628350B4 (de) | 1996-07-13 | 1996-07-13 | Verwendung einer rostfreien ferritisch-austenitischen Stahllegierung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0818552A2 EP0818552A2 (de) | 1998-01-14 |
| EP0818552A3 EP0818552A3 (de) | 1998-03-25 |
| EP0818552B1 true EP0818552B1 (de) | 2004-11-24 |
Family
ID=7799785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97111887A Expired - Lifetime EP0818552B1 (de) | 1996-07-13 | 1997-07-12 | Rostfreie ferritisch-austenitische Gussstahllegierung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0818552B1 (es) |
| DE (2) | DE19628350B4 (es) |
| ES (1) | ES2233986T3 (es) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073530A1 (en) | 1999-05-27 | 2000-12-07 | Sandvik Ab; (Publ) | Surface modification of high temperature alloys |
| SE0000678L (sv) | 2000-03-02 | 2001-04-30 | Sandvik Ab | Duplext rostfritt stål |
| US20150354038A1 (en) * | 2013-01-15 | 2015-12-10 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Duplex stainless steel material and duplex stainless steel pipe |
| JP6286435B2 (ja) * | 2013-08-28 | 2018-02-28 | 株式会社日立製作所 | 二相ステンレス鋼並びにこれを用いた二相ステンレス鋼製構造物 |
| JP2017095794A (ja) * | 2015-11-17 | 2017-06-01 | 株式会社神戸製鋼所 | 二相ステンレス鋼材および二相ステンレス鋼管 |
| CN113215478B (zh) * | 2021-05-14 | 2022-03-04 | 东北大学 | 一种提升超级不锈钢抗高温氧化性能的方法 |
| CN114921710A (zh) * | 2022-05-20 | 2022-08-19 | 青田保俐铸造有限公司 | 一种提高不锈钢304铸件耐腐蚀的铸造工艺 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7705578L (sv) * | 1976-05-15 | 1977-11-16 | Nippon Steel Corp | Tvafasigt rostfritt stal |
| DE3310693A1 (de) * | 1983-03-24 | 1984-10-04 | Fried. Krupp Gmbh, 4300 Essen | Korrosionsbestaendiger chromstahl und verfahren zu seiner herstellung |
| SE451465B (sv) * | 1984-03-30 | 1987-10-12 | Sandvik Steel Ab | Ferrit-austenitiskt rostfritt stal mikrolegerat med molybden och koppar och anvendning av stalet |
| SE453838B (sv) * | 1985-09-05 | 1988-03-07 | Santrade Ltd | Hogkvevehaltigt ferrit-austenitiskt rostfritt stal |
| US4715908A (en) * | 1985-11-26 | 1987-12-29 | Esco Corporation | Duplex stainless steel product with improved mechanical properties |
| JPH0717987B2 (ja) * | 1989-03-29 | 1995-03-01 | 住友金属工業株式会社 | 熱間加工性に優れた高耐食二相ステンレス鋼 |
| JP3227734B2 (ja) * | 1991-09-30 | 2001-11-12 | 住友金属工業株式会社 | 高耐食二相ステンレス鋼とその製造方法 |
| JP2500162B2 (ja) * | 1991-11-11 | 1996-05-29 | 住友金属工業株式会社 | 耐食性に優れた高強度二相ステンレス鋼 |
| SE501321C2 (sv) * | 1993-06-21 | 1995-01-16 | Sandvik Ab | Ferrit-austenitiskt rostfritt stål samt användning av stålet |
| JP3236713B2 (ja) * | 1993-10-20 | 2001-12-10 | 川崎製鉄株式会社 | 深絞り成形性に優れたＦｅ−Ｃｒ−Ｎｉ系合金 |
-
1996
- 1996-07-13 DE DE19628350A patent/DE19628350B4/de not_active Expired - Fee Related
-
1997
- 1997-07-12 ES ES97111887T patent/ES2233986T3/es not_active Expired - Lifetime
- 1997-07-12 EP EP97111887A patent/EP0818552B1/de not_active Expired - Lifetime
- 1997-07-12 DE DE59712090T patent/DE59712090D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0818552A3 (de) | 1998-03-25 |
| EP0818552A2 (de) | 1998-01-14 |
| DE19628350B4 (de) | 2004-04-15 |
| ES2233986T3 (es) | 2005-06-16 |
| DE59712090D1 (de) | 2004-12-30 |
| DE19628350A1 (de) | 1998-01-15 |
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