EP0225263B1 - Tôle ou bande en acier ferritique inoxydable, en particulier pour systèmes d'échappement - Google Patents
Tôle ou bande en acier ferritique inoxydable, en particulier pour systèmes d'échappement Download PDFInfo
- Publication number
- EP0225263B1 EP0225263B1 EP86420267A EP86420267A EP0225263B1 EP 0225263 B1 EP0225263 B1 EP 0225263B1 EP 86420267 A EP86420267 A EP 86420267A EP 86420267 A EP86420267 A EP 86420267A EP 0225263 B1 EP0225263 B1 EP 0225263B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- sheet
- resistance
- oxidation
- test
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title description 4
- 239000010959 steel Substances 0.000 title description 4
- 238000000137 annealing Methods 0.000 claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 9
- 239000006104 solid solution Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000005482 strain hardening Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 238000004140 cleaning Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 13
- 239000010955 niobium Substances 0.000 description 83
- 238000012360 testing method Methods 0.000 description 65
- 238000007254 oxidation reaction Methods 0.000 description 40
- 230000003647 oxidation Effects 0.000 description 35
- 238000005266 casting Methods 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 239000011651 chromium Substances 0.000 description 13
- 125000004122 cyclic group Chemical group 0.000 description 12
- 208000016261 weight loss Diseases 0.000 description 12
- 230000004580 weight loss Effects 0.000 description 12
- 229910052758 niobium Inorganic materials 0.000 description 11
- 229910052726 zirconium Inorganic materials 0.000 description 9
- 229910052804 chromium Inorganic materials 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000009938 salting Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 101100322245 Caenorhabditis elegans des-2 gene Proteins 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Images
Classifications
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Definitions
- the invention relates to the field of rolled products of stainless ferritic steel, and more particularly that of exhaust systems.
- the Applicant has tried to improve the properties compromises obtained with sheets or strips of shades already known and more particularly with stainless ferritic grades stabilized with Nb and / or Zr, and this especially with regard to the creep resistance and to hot oxidation.
- Ferritic stainless grades are superior to austenitic grades because of their coefficient of thermal expansion.
- Patent application FR-A-2 463194 relates to ferritic steels with 1 to 20% Cr and Ti, Nb with 0.5 to 2% AI, in which a minimum AI content of 0.5% and preferably 0.75% is required to provide resistance to oxidation at elevated temperatures. Above 2%, AI has a detrimental effect on the weldability.
- a ferritic stainless steel contains 0.08 to 0.5% AI and one or more of the elements B (2-50 ppm), Ti (0.005-0.4%), Nb (0.005-0.4%), V (0.005-0.4%) and Zr (0.005-0.4%), and AI results in structural changes at the various stages of sheet metal transformation with an increase in “ridging resistance” (resistance to the phenomenon of stringing or crumpling).
- Zrest consumed by stabilization that is to say by trapping C and N in the form of nitrides and carbides, up to approximately 7 (C + N)%.
- the free Zr is therefore limited to 0.2%, which makes it possible to avoid the drawbacks linked to the formation of eutectic compounds containing Fe 3 Zr in the case where there is more than 0.25% of free Zr, these compounds resulting in a degradation of the mechanical characteristics, in particular of the ductility and of the creep resistance, and a reduction in the corrosion resistance, as indicated essentially by document US-A-4010049.
- the free Zr has no significant direct influence on the resistance to oxidation.
- the free or non-combined Nb is between 0.25 and 0.55%.
- the Nbtotal includes in addition to the free Nb an addition of 7 (C + N) -Zr, to compensate for the lack of stabilization by insufficient Zr, in the case where Zr is between 7 (C + N) - 0.1 and 7 (C + N).
- the total content of AI assayed corresponds essentially to AI in solid solution.
- Zr has more affinity than AI for oxygen and there is little residual oxygen in the metal, so that there can be only very little AI in the form of alumina.
- the affinities of Zr and Nb for nitrogen and the greater affinity of AI for oxygen than for nitrogen means that aluminum nitride AIN does not form.
- the result confirmed qualitatively by micrographic examinations, is that AI is in solid solution with the exception of a content at most equal to 0.003% and corresponding essentially to alumina.
- 0.020 to 0.080% AI a surprising improvement in resistance to hot oxidation is obtained, linked to the role of aluminum in solid solution, whether it is continuous oxidation.
- the AI content is limited to 0.080% so as to avoid, as has been the experience with 17% Cr stainless steels (type AISI 430), dross on the weld beads causing irregular oxidation and cracking conformation, therefore faster corrosion.
- This dross effect is significant at the 0.1% AI level; but if one also wants to avoid or limit the inclusions of alumina linked to the presence of too much aluminum, these inclusions being sites of initiation of stings following the projections of salt water coming from salting or desalination of roads during winter, it is advisable to remain below 0.05% of AI as it is done in the preferential composition indicated below.
- AI 0.020 to 0.045 and more preferably 0.025 to 0.040.
- the sheet or strip according to the invention is in the annealed and optionally erected state, this annealed state typically corresponding to a treatment at 1000 ⁇ 10 ° C for 0.5 to 5 min.
- the invention also relates to the method of manufacturing a sheet or strip of ferritic stainless steel, in which, as is known, the hot rolled strip is annealed with a thickness of between 2.5 and 5 mm between 800 and 1000 ° C. under slightly oxidizing conditions, then it is shot and pickled, then it is cold rolled to the delivery thickness typically between 0.6 and 3 mm, with or without annealing and intermediate pickling, and it is annealed at the end of the parade, then it is subjected to a finishing pass or so-called "skin-pass" hardening producing an elongation of less than 1%, with possibly a final stripping.
- the hot rolled strip is annealed with a thickness of between 2.5 and 5 mm between 800 and 1000 ° C. under slightly oxidizing conditions, then it is shot and pickled, then it is cold rolled to the delivery thickness typically between 0.6 and 3 mm, with or without annealing and intermediate pickling, and it is annealed at the end of the parade, then
- This process differs from the prior art in that the sheet or strip has the composition of the invention and in that the annealing, making it possible to obtain good hot creep results, is carried out between 980 and 1020 ° C. , and preferably between 990 and 1010 ° C for 0.5 to 5 min, or at a temperature and for a time giving an equivalent metallurgical state.
- This final annealing is typically carried out following a rolling producing an elongation of at least 100% from the previous annealing.
- Rectangular test specimens of 310 x 25 mm were cut from the sheets, and bent at 90 ° to 25 mm from one end. Then they were laid flat each on 2 supports of internal distance 254 mm and external distance 264 mm and they were subjected to continuous SAGTEST tests of creep under their own weight during 100 h at 850 ° C.
- the sheets according to the invention with an uncombined Nb content of between 0.25 and 0.55%, and preferably with the intervals specified above, are thus indicated by their level of resistance to hot creep.
- creep tests in tension at 800 ° C confirmed the SAGTEST tests.
- the welds of the sheets according to the invention all exhibit very good ductility, unlike sheets with Nb + AI, and this even in the case of casting No. 445 where the Zr content is slightly less than 7 (C + N) .
- the samples used come from 3 flows of 25 kg transformed according to the process indicated in connection with the test series N ° 1, the cold rolling being stopped at the thickness 1.5 mm and being followed by annealing under vacuum. from 1 h at 830 ° C.
- the analyzes of the 3 castings, at 0.4% Nb and with increasing AI content, are shown in Table 7.
- the samples are 20 x 30 mm plates cut out with a punch. in the annealed 1.5 mm sheets, then electrolytically polished in an aceto-perchloric bath (88-12) at room temperature for 5 min, then weighed in mg.
- Each oxidation test relates to 3 test pieces of the same type, with an additional test piece for metallographic examinations.
- the hot air oxidation tests have a unit duration of 50 h, the air renewal is ensured by "chimney effect" by means of a ⁇ 6 mm hole made in the lower part of the oven.
- the oxides formed are removed by electrolytic pickling in a neutral medium, and it is the weight loss of the samples per unit area (in g / m 2 ) which makes it possible to assess "a contrario" the resistance to hot oxidation.
- the results on the 3 test pieces of each test are well grouped in the case of continuous oxidation, and we have therefore given in this case only one result, average of the 3 individual results.
- the AI contents are plotted on the graph in FIG. 4.
- test pieces prepared as described above are subjected to cycles each comprising: rapid heating, holding for 10 min at the test temperature, then air cooling and maintaining at room temperature or close to total duration 10 min.
- the duration of a test is 100 h during which 300 cycles are carried out giving an overall maintenance at the test temperature of 50 h.
- test pieces from casting with Nb + Al No 101 and casting according to the invention N os 201 and 202, the analyzes of which appear in table 7.
- the tests relate to both full-sheet test pieces and test pieces containing welds, the latter being carried out as indicated with regard to the series of tests No. 2, and the right side of these welds then occupying% of the width of the test pieces.
- the sheets of the invention are therefore distinguished from sheets of Nb without Zr in that their welds without filler metal have better resistance to alternating or cyclic oxidation in this temperature range (850 to 950 ° C) important for exhaust manifolds.
- the strips or sheets of the invention are used for any application in which an economic compromise of ductility (sheet metal and welds), heat resistance (creep, continuous or cyclic air oxidation) and resistance to corrosion.
- Application to exhaust systems is particularly typical.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
- Soft Magnetic Materials (AREA)
- Heat Treatment Of Steel (AREA)
- Exhaust Silencers (AREA)
- Woven Fabrics (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86420267T ATE42770T1 (de) | 1985-11-05 | 1986-10-29 | Blech oder band aus ferritischem rostfreien stahl, insbesondere fuer auspuffsysteme. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8516781A FR2589482B1 (fr) | 1985-11-05 | 1985-11-05 | Tole ou bande en acier ferritique inoxydable, en particulier pour systemes d'echappement |
FR8516781 | 1985-11-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0225263A1 EP0225263A1 (fr) | 1987-06-10 |
EP0225263B1 true EP0225263B1 (fr) | 1989-05-03 |
Family
ID=9324764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86420267A Expired EP0225263B1 (fr) | 1985-11-05 | 1986-10-29 | Tôle ou bande en acier ferritique inoxydable, en particulier pour systèmes d'échappement |
Country Status (14)
Country | Link |
---|---|
US (1) | US4726853A (no) |
EP (1) | EP0225263B1 (no) |
JP (1) | JPS62112757A (no) |
AT (1) | ATE42770T1 (no) |
AU (1) | AU585083B2 (no) |
BR (1) | BR8605431A (no) |
CA (1) | CA1285791C (no) |
DE (1) | DE3663150D1 (no) |
DK (1) | DK518886A (no) |
ES (1) | ES2008092B3 (no) |
FR (1) | FR2589482B1 (no) |
NO (1) | NO167307C (no) |
PT (1) | PT83679B (no) |
ZA (1) | ZA868359B (no) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706415A1 (de) * | 1987-02-27 | 1988-09-08 | Thyssen Edelstahlwerke Ag | Halbfertigerzeugnis aus ferritischem stahl und seine verwendung |
US4834808A (en) * | 1987-09-08 | 1989-05-30 | Allegheny Ludlum Corporation | Producing a weldable, ferritic stainless steel strip |
DE68919606T2 (de) * | 1988-09-05 | 1995-04-06 | Hitachi Metals Ltd | Hitzebeständige Gussstähle. |
US4942922A (en) * | 1988-10-18 | 1990-07-24 | Crucible Materials Corporation | Welded corrosion-resistant ferritic stainless steel tubing having high resistance to hydrogen embrittlement and a cathodically protected heat exchanger containing the same |
EP0387901B1 (en) * | 1989-03-17 | 1994-11-02 | Kawasaki Steel Corporation | Stainless steel sheet for exterior building constituent and method of making the same |
US5288343A (en) * | 1989-03-17 | 1994-02-22 | Kawasaki Steel Corporation | Stainless steel sheet for exterior building constituent |
DE3911104C1 (no) * | 1989-04-06 | 1990-11-29 | Krupp Stahl Ag, 4630 Bochum, De | |
US5110544A (en) * | 1989-11-29 | 1992-05-05 | Nippon Steel Corporation | Stainless steel exhibiting excellent anticorrosion property for use in engine exhaust systems |
JPH0747799B2 (ja) * | 1989-11-29 | 1995-05-24 | 新日本製鐵株式会社 | 耐食性の優れたエンジン排ガス系材料用ステンレス鋼 |
US5302214A (en) * | 1990-03-24 | 1994-04-12 | Nisshin Steel Co., Ltd. | Heat resisting ferritic stainless steel excellent in low temperature toughness, weldability and heat resistance |
JP2696584B2 (ja) * | 1990-03-24 | 1998-01-14 | 日新製鋼株式会社 | 低温靭性,溶接性および耐熱性に優れたフエライト系耐熱用ステンレス鋼 |
JP2562740B2 (ja) * | 1990-10-15 | 1996-12-11 | 日新製鋼株式会社 | 耐粒界腐食性,造管性および高温強度に優れたフエライト系ステンレス鋼 |
WO1993021356A1 (en) * | 1992-04-09 | 1993-10-28 | Nippon Steel Corporation | Ferritic stainless steel with excellent high-temperature salt injury resistance and high-temperature strength |
JPH06220545A (ja) * | 1993-01-28 | 1994-08-09 | Nippon Steel Corp | 靱性の優れたCr系ステンレス鋼薄帯の製造方法 |
ES2184767T3 (es) * | 1993-04-27 | 2003-04-16 | Nisshin Steel Co Ltd | Acero inoxidable ferritico excelente por su resistencia a la oxidacion a alta temperatura y a la adherencia de la capa de oxido. |
DE69500714T2 (de) * | 1994-04-21 | 1998-03-26 | Kawasaki Steel Co | Heissgewalzter ferritischer Stahl für eine Kraftfahrzeug-Abgasanlage |
EP0786140B1 (en) * | 1994-10-11 | 2000-06-14 | Crs Holdings, Inc. | Corrosion-resistant magnetic material |
SE504295C2 (sv) * | 1995-04-21 | 1996-12-23 | Avesta Sheffield Ab | Förfarande för kallvalsning-glödgning-kallsträckning av ett varmvalsat rostfritt stålband |
FR2798394B1 (fr) * | 1999-09-09 | 2001-10-26 | Ugine Sa | Acier ferritique a 14% de chrome stabilise au niobium et son utilisation dans le domaine de l'automobile |
ES2230227T3 (es) * | 2000-12-25 | 2005-05-01 | Nisshin Steel Co., Ltd. | Lamina de acero inoxidable ferritico con buena trabajabilidad y metodo para su fabricacion. |
DE60224249T3 (de) | 2001-09-27 | 2012-10-18 | Hitachi Metals, Ltd. | Stahl für Festoxid-Brennstoffzellenseparatoren |
WO2005014873A1 (ja) * | 2003-08-06 | 2005-02-17 | Nisshin Steel Co., Ltd. | ステンレス鋼の加工硬化材 |
KR20060089136A (ko) * | 2005-02-03 | 2006-08-08 | 닛신 세이코 가부시키가이샤 | Cpu 소켓 프레임용 또는 cpu 고정 커버용 고강성스테인레스강판 |
EP1818421A1 (fr) * | 2006-02-08 | 2007-08-15 | UGINE & ALZ FRANCE | Acier inoxydable ferritique dit à 19% de chrome stabilisé au niobium |
SI3670692T1 (sl) | 2018-12-21 | 2022-11-30 | Outokumpu Oyj, | Feritno nerjavno jeklo |
CN116145030B (zh) * | 2022-12-23 | 2023-12-15 | 鞍钢股份有限公司 | 三代核电站关键设备支撑用铁素体不锈钢钢板及制造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4010049A (en) * | 1975-10-06 | 1977-03-01 | Jones & Laughlin Steel Corporation | Columbium-stabilized high chromium ferritic stainless steels containing zirconium |
DE2701329C2 (de) * | 1977-01-14 | 1983-03-24 | Thyssen Edelstahlwerke AG, 4000 Düsseldorf | Korrosionsbeständiger ferritischer Chrom-Molybdän-Nickelstahl |
US4261739A (en) * | 1979-08-06 | 1981-04-14 | Armco Inc. | Ferritic steel alloy with improved high temperature properties |
-
1985
- 1985-11-05 FR FR8516781A patent/FR2589482B1/fr not_active Expired
-
1986
- 1986-10-27 US US06/923,500 patent/US4726853A/en not_active Expired - Fee Related
- 1986-10-29 AT AT86420267T patent/ATE42770T1/de not_active IP Right Cessation
- 1986-10-29 DE DE8686420267T patent/DE3663150D1/de not_active Expired
- 1986-10-29 EP EP86420267A patent/EP0225263B1/fr not_active Expired
- 1986-10-29 ES ES86420267T patent/ES2008092B3/es not_active Expired
- 1986-10-30 DK DK518886A patent/DK518886A/da not_active Application Discontinuation
- 1986-10-30 CA CA000521827A patent/CA1285791C/fr not_active Expired - Lifetime
- 1986-11-03 ZA ZA868359A patent/ZA868359B/xx unknown
- 1986-11-04 NO NO864394A patent/NO167307C/no unknown
- 1986-11-04 PT PT83679A patent/PT83679B/pt not_active IP Right Cessation
- 1986-11-04 AU AU64802/86A patent/AU585083B2/en not_active Ceased
- 1986-11-04 BR BR8605431A patent/BR8605431A/pt unknown
- 1986-11-05 JP JP61263639A patent/JPS62112757A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ES2008092B3 (es) | 1989-07-16 |
NO167307C (no) | 1991-10-23 |
ATE42770T1 (de) | 1989-05-15 |
CA1285791C (fr) | 1991-07-09 |
FR2589482B1 (fr) | 1987-11-27 |
NO864394D0 (no) | 1986-11-04 |
PT83679B (pt) | 1989-06-30 |
FR2589482A1 (fr) | 1987-05-07 |
DE3663150D1 (en) | 1989-06-08 |
ZA868359B (en) | 1987-06-24 |
NO864394L (no) | 1987-05-06 |
EP0225263A1 (fr) | 1987-06-10 |
JPS62112757A (ja) | 1987-05-23 |
DK518886D0 (da) | 1986-10-30 |
PT83679A (fr) | 1986-12-01 |
BR8605431A (pt) | 1987-08-11 |
NO167307B (no) | 1991-07-15 |
US4726853A (en) | 1988-02-23 |
AU6480286A (en) | 1987-05-07 |
AU585083B2 (en) | 1989-06-08 |
DK518886A (da) | 1987-05-06 |
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