EP0035369A1 - Ferritische Eisen-Aluminium-Chrom-Legierungen - Google Patents
Ferritische Eisen-Aluminium-Chrom-Legierungen Download PDFInfo
- Publication number
- EP0035369A1 EP0035369A1 EP81300793A EP81300793A EP0035369A1 EP 0035369 A1 EP0035369 A1 EP 0035369A1 EP 81300793 A EP81300793 A EP 81300793A EP 81300793 A EP81300793 A EP 81300793A EP 0035369 A1 EP0035369 A1 EP 0035369A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminium
- chromium
- iron
- alloys
- alloy
- 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.)
- Granted
Links
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
Definitions
- the present invention relates to ferritic alloys of iron, chromium and aluminium containing a significant amount of hafnium.
- Ferritic iron-chromium-aluminium alloys are known and are in use particularly in environment where resistance to oxidation is of importance. We have found that the oxidation resistance of these alloys and particularly their resistance to oxidation in the presence of sulphur and oxygen, as may be encountered in combustion atmospheres, can be greatly enhanced by small additions of hafnium.
- the present invention provides a ferritic alloy of iron, chromium and aluminium containing:-
- the alloys contain 15.5 to 25% chromium and 4.5 to 10% aluminium.
- the alloys contain from 15.5 to 18% chromium.
- the alloys contain from 4.5 to 6% aluminium e.g. about 5%.
- the percentage of nickel is chosen so that it is not so great within the range quoted above as to produce significant amounts of a second phase taking into account the amounts chosen for each of the other ingredients of the alloy.
- the amount of nickel does not exceed 0.5%.
- rare earth metals may be used in addition to hafnium, e.g. yttrium, zirconium in an amount up to 2% or more preferably in an amount up to 1% or the commercially available alloy known as mischmetall in an amount up to 1%.
- hafnium e.g. yttrium, zirconium
- mischmetall in an amount up to 1%
- the principal ingredients of mischmetall, cerium and lanthanum may be used individually if desired.
- the alloys may be manufactured by the processes normally used for making alloys of this general type.
- the alloys may be made by induction melting, either in air or using inert atmosphere or vacuum as appropriate, cast into ingots and subsequently forged or rolled into billet or slab prior to working down to strip, bar, wire or any other commercially saleable form.
- a charge of high purity iron and low carbon ferrochromium is melted down in a basic lined induction furnace, either in air under a basic slag, or under an inert atmosphere or in vacuo, without slag, as is appropriate.
- a basic lined induction furnace either in air under a basic slag, or under an inert atmosphere or in vacuo, without slag, as is appropriate.
- the appropriate additions of aluminium, ferrotitanium and hafnium metal are added, in that order, the metal brought to temperature and cast into an appropriate ingot mould.
- melt was 10 kg. giving a 2b" (60 mm) sq ingot. This was then heated to about 1100°C and forged under a 10 cwt hammer to produce suitable test bar.
- alloys not in accordance with the invention were prepared having the compositions shown below.
- the test was of relatively short duration but involved cycling between ambient and test temperature.
- the test chamber was an alumina tube 2" (50 mm) internal diameter in which the sample was positioned across an open ended alumina boat. Heating was by means of the concentric electric furnace, the temperature being measured by reference to a noble metal thermo-couple, the hot junction of which was immediately above the specimen.
- the test atmosphere was produced by burning natural gas using excess air over that required for combustion, the flow rates being 1.4 cubic foot and 1.14 cubic foot (0.04 and 0.4 cubic metres) per hour respectively for gas and air.
- the combustion product, a mixture of nitrogen, oxygen r carbon dioxide and steam was pre-heated to test temperature before passing through the test chamber; test temperature was established prior to inserting the sample so that heating was rapid.
- test cycle was for six hours, after which the specimens were removed from the test chamber and cooled in a closed container so that any oxide scale which became detached was collected. When cold, the specimen was weighed, together with any detached scale and then scrubbed with a stiff bristle brush to remove any loosely adhering oxide prior to re-weighing to get the starting weight for the next cycle. The whole procedure was repeated for a total of seven cycles and the total gain in weight, that is the sum of the individual gains, expressed as milligrams per square centimetre, for the 42 hour period, using the original surface area for the untested specimen, was taken as the scaling index.
- Samples A to C are in accordance with the invention but do not exemplify its most preferred embodiments. It can be seen that the scaling index of A at 1200°C is considerably improved over that of comparative Sample 1 and is still superior to that of comparative Sample 2 despite this latter containing much higher amounts of chromium and aluminium. The scaling index of Samples A to C is quite high however at 1250°C. Examples D to K which contain above 4.5% Al and 15.0% Cr show the still more superior characteristics of steels in accordance with the preferred practice of the invention and it can be seen that low scaling indexes are found even at 1250 0 C.
- titanium appears to confer a much smaller but still significant benefit in increased oxidation resistance to the steel containing hafnium. More significantly, the addition of titanium has a substantial effect in reducung the as-cast grain size of the steel and hence greatly improves its hot- working properties. In particular, it was observed that the cast structure of titanium-containing alloys such as B differed from that of alloys A and 2. It was noted that the addition of titanium appeared to have a marked effect on the crystallisation pattern, modifying the coarse columnar crystals of the normal product and giving a more uniform crystal distribution across the section.
- Suitable fields of application for steels according to the invention are those in which resistance to oxidation at high temperatures is required. Examples of such uses are in the provision of electric furnace winding material or resistance heating wire generally and in the provision of knitted wire catalyst supports e.g. for use in vehicle exhaust systems for reducing emissions. Another field in which such properties are of value is in the construction of furnaces, for instance fluid bed combustion furnaces.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Heat Treatment Of Steel (AREA)
- Manufacture And Refinement Of Metals (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8006739A GB2082631A (en) | 1980-02-28 | 1980-02-28 | Ferritic iron-aluminium-chromium alloys |
GB8006739 | 1980-02-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0035369A1 true EP0035369A1 (de) | 1981-09-09 |
EP0035369B1 EP0035369B1 (de) | 1985-01-30 |
Family
ID=10511743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810300793 Expired EP0035369B1 (de) | 1980-02-28 | 1981-02-26 | Ferritische Eisen-Aluminium-Chrom-Legierungen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0035369B1 (de) |
DE (1) | DE3168563D1 (de) |
GB (1) | GB2082631A (de) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0091526A2 (de) * | 1982-04-12 | 1983-10-19 | Allegheny Ludlum Corporation | Eisen-Chrom-Aluminiumlegierung, Gegenstände hieraus und Herstellungsverfahren dafür |
FR2565603A1 (fr) * | 1984-06-08 | 1985-12-13 | Osaka Prefecture | Alliage prothetique du type fe-cr-al pour traitement medical et son procede de fabrication |
EP0246939A2 (de) * | 1986-04-21 | 1987-11-25 | Kawasaki Steel Corporation | Rostfreier Chrom-Aluminium-Stahl mit hoher Beständigkeit gegen Oxydation und Abblätterung und Folien aus Chrom-Aluminium-Stahl für Katalysatorträger in katalytischen Konvertern |
DE3621569A1 (de) * | 1986-06-27 | 1988-01-21 | Vacuumschmelze Gmbh | Herstellung einer chrom-aluminium-eisen-legierung zur verwendung als traegermaterial fuer katalysatoren |
DE3813685A1 (de) * | 1987-04-24 | 1988-11-03 | Nippon Steel Corp | Gewalzte, rostfreie stahlfolie mit hohem aluminium-gehalt zur verwendung als substrat eines katalysator-traegers |
GB2224288A (en) * | 1988-11-01 | 1990-05-02 | British Steel Plc | Improvements in and relating to hafnium-containing alloy steels |
EP0387670A1 (de) * | 1989-03-16 | 1990-09-19 | Krupp VDM GmbH | Ferritische Stahllegierung |
DE4125212A1 (de) * | 1990-07-31 | 1992-03-19 | Matsushita Electric Works Ltd | Verfahren zum herstellen einer ferritischen legierung mit einer verschleissbestaendigen aluminiumoxid-oberflaechenschicht |
EP0497992A1 (de) * | 1989-05-16 | 1992-08-12 | Nippon Steel Corporation | Rostfreie Stahlfolie für Katalysatorträger in Auspuffentgiftungsanlagen für Kraftfahrzeuge und Verfahren zu ihrer Herstellung |
EP0564665A2 (de) * | 1990-05-14 | 1993-10-13 | Kanthal AB | Spaltöfen |
EP0625585A1 (de) * | 1993-05-20 | 1994-11-23 | Kawasaki Steel Corporation | Eisen-Chrome-Aluminium-Legierungsfolien mit hoher Oxydationsbeständigkeit für Katalysatorträger in katalytischen Konvertern und Verfahren zur Herstellung desselben |
WO2020054384A1 (ja) * | 2018-09-13 | 2020-03-19 | Jfeスチール株式会社 | フェライト系ステンレス鋼板およびその製造方法、ならびに、Al系めっきステンレス鋼板 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102364524B1 (ko) * | 2018-01-30 | 2022-02-17 | 제이에프이 스틸 가부시키가이샤 | Fe-Cr 합금 및 그 제조 방법, 그리고 저항 발열체 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1558670A1 (de) * | 1964-04-06 | 1970-04-23 | Atomic Energy Commission | Korrosions- und rostbestaendige Legierung |
DE1558657B2 (de) * | 1967-05-31 | 1970-06-04 | Suedwestfalen Ag Stahlwerke | Verwendung von nichtrostenden Chromstaehlen als Ausgangsmaterial fuer Fertigerzeugnisse mit hoher Oberflaechenguete |
US3591365A (en) * | 1969-01-16 | 1971-07-06 | Santoku Metal Ind | Heat resisting corrosion resisting iron chromium alloy |
FR2165453A5 (de) * | 1971-12-14 | 1973-08-03 | Deutsche Edelstahlwerke Ag | |
GB1542694A (en) * | 1975-06-23 | 1979-03-21 | United Technologies Corp | Alumina forming coatings containing hafnium for high temperature applications |
GB1554293A (en) * | 1975-09-22 | 1979-10-17 | Yazaki Corp | Solar collector |
-
1980
- 1980-02-28 GB GB8006739A patent/GB2082631A/en not_active Withdrawn
-
1981
- 1981-02-26 DE DE8181300793T patent/DE3168563D1/de not_active Expired
- 1981-02-26 EP EP19810300793 patent/EP0035369B1/de not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1558670A1 (de) * | 1964-04-06 | 1970-04-23 | Atomic Energy Commission | Korrosions- und rostbestaendige Legierung |
DE1558657B2 (de) * | 1967-05-31 | 1970-06-04 | Suedwestfalen Ag Stahlwerke | Verwendung von nichtrostenden Chromstaehlen als Ausgangsmaterial fuer Fertigerzeugnisse mit hoher Oberflaechenguete |
US3591365A (en) * | 1969-01-16 | 1971-07-06 | Santoku Metal Ind | Heat resisting corrosion resisting iron chromium alloy |
FR2165453A5 (de) * | 1971-12-14 | 1973-08-03 | Deutsche Edelstahlwerke Ag | |
GB1542694A (en) * | 1975-06-23 | 1979-03-21 | United Technologies Corp | Alumina forming coatings containing hafnium for high temperature applications |
GB1554293A (en) * | 1975-09-22 | 1979-10-17 | Yazaki Corp | Solar collector |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0091526B1 (de) * | 1982-04-12 | 1987-08-12 | Allegheny Ludlum Corporation | Eisen-Chrom-Aluminiumlegierung, Gegenstände hieraus und Herstellungsverfahren dafür |
EP0091526A2 (de) * | 1982-04-12 | 1983-10-19 | Allegheny Ludlum Corporation | Eisen-Chrom-Aluminiumlegierung, Gegenstände hieraus und Herstellungsverfahren dafür |
FR2565603A1 (fr) * | 1984-06-08 | 1985-12-13 | Osaka Prefecture | Alliage prothetique du type fe-cr-al pour traitement medical et son procede de fabrication |
EP0246939A2 (de) * | 1986-04-21 | 1987-11-25 | Kawasaki Steel Corporation | Rostfreier Chrom-Aluminium-Stahl mit hoher Beständigkeit gegen Oxydation und Abblätterung und Folien aus Chrom-Aluminium-Stahl für Katalysatorträger in katalytischen Konvertern |
EP0246939A3 (en) * | 1986-04-21 | 1988-10-12 | Kawasaki Steel Corporation | Fe-cr-al stainless steel having high oxidation resistance and spalling resistance and fe-cr-al steel foil for catalyst substrate of catalytic converter |
US4904540A (en) * | 1986-04-21 | 1990-02-27 | Kawasaki Steel Corp. | Fe-Cr-Al stainless steel having high oxidation resistance and spalling resistance and Fe-Cr-Al steel for catalyst substrate of catalytic converter |
DE3621569A1 (de) * | 1986-06-27 | 1988-01-21 | Vacuumschmelze Gmbh | Herstellung einer chrom-aluminium-eisen-legierung zur verwendung als traegermaterial fuer katalysatoren |
DE3813685A1 (de) * | 1987-04-24 | 1988-11-03 | Nippon Steel Corp | Gewalzte, rostfreie stahlfolie mit hohem aluminium-gehalt zur verwendung als substrat eines katalysator-traegers |
GB2224288B (en) * | 1988-11-01 | 1992-05-13 | British Steel Plc | Improvements in and relating to hafnium-containing alloy steels |
GB2224288A (en) * | 1988-11-01 | 1990-05-02 | British Steel Plc | Improvements in and relating to hafnium-containing alloy steels |
EP0370645A1 (de) * | 1988-11-01 | 1990-05-30 | Avesta Sheffield Limited | Hafniumhaltige legierte Stähle |
EP0387670A1 (de) * | 1989-03-16 | 1990-09-19 | Krupp VDM GmbH | Ferritische Stahllegierung |
EP0497992A1 (de) * | 1989-05-16 | 1992-08-12 | Nippon Steel Corporation | Rostfreie Stahlfolie für Katalysatorträger in Auspuffentgiftungsanlagen für Kraftfahrzeuge und Verfahren zu ihrer Herstellung |
EP0658633A2 (de) * | 1989-05-16 | 1995-06-21 | Nippon Steel Corporation | Rostfreie Stahlfolie für Katalysatorträger in Auspuffentgiftungsanlagen für Kraftfahrzeuge und Verfahren zu ihrer Herstellung |
EP0658633A3 (de) * | 1989-05-16 | 1995-10-25 | Nippon Steel Corp | Rostfreie Stahlfolie für Katalysatorträger in Auspuffentgiftungsanlagen für Kraftfahrzeuge und Verfahren zu ihrer Herstellung. |
EP0564665A2 (de) * | 1990-05-14 | 1993-10-13 | Kanthal AB | Spaltöfen |
EP0564665A3 (en) * | 1990-05-14 | 1993-12-01 | Kanthal Ab | Cracking furnace |
DE4125212A1 (de) * | 1990-07-31 | 1992-03-19 | Matsushita Electric Works Ltd | Verfahren zum herstellen einer ferritischen legierung mit einer verschleissbestaendigen aluminiumoxid-oberflaechenschicht |
EP0625585A1 (de) * | 1993-05-20 | 1994-11-23 | Kawasaki Steel Corporation | Eisen-Chrome-Aluminium-Legierungsfolien mit hoher Oxydationsbeständigkeit für Katalysatorträger in katalytischen Konvertern und Verfahren zur Herstellung desselben |
WO2020054384A1 (ja) * | 2018-09-13 | 2020-03-19 | Jfeスチール株式会社 | フェライト系ステンレス鋼板およびその製造方法、ならびに、Al系めっきステンレス鋼板 |
JP2020059927A (ja) * | 2018-09-13 | 2020-04-16 | Jfeスチール株式会社 | フェライト系ステンレス鋼板 |
JP6687177B1 (ja) * | 2018-09-13 | 2020-04-22 | Jfeスチール株式会社 | Al系めっきステンレス鋼板、および、フェライト系ステンレス鋼板の製造方法 |
US11767573B2 (en) | 2018-09-13 | 2023-09-26 | Jfe Steel Corporation | Ferritic stainless steel sheet and method of producing same, and al or al alloy coated stainless steel sheet |
Also Published As
Publication number | Publication date |
---|---|
DE3168563D1 (en) | 1985-03-14 |
EP0035369B1 (de) | 1985-01-30 |
GB2082631A (en) | 1982-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0035369B1 (de) | Ferritische Eisen-Aluminium-Chrom-Legierungen | |
US4789412A (en) | Cobalt-base alloy having high strength and high toughness, production process of the same, and gas turbine nozzle | |
GB2070642A (en) | Ferritic iron-aluminium- chromium alloys | |
Kawahara | Effect of additive elements on cold workability in FeCo alloys | |
CA1066922A (en) | Heat-resistant allow for welded structures | |
CH375903A (de) | Nioblegierung | |
EP0549286A1 (de) | Gegen hohe Temperatur beständige Ni-Cr-Legierung | |
EP0269973A2 (de) | Gegen Zementierung beständige Legierung | |
JP3397092B2 (ja) | 熱間加工性に優れるAl含有オーステナイト系ステンレス鋼 | |
WO2003029505A1 (en) | Ferritic stainless steel for use in high temperature applications and method for producing a foil of the steel | |
US5045404A (en) | Heat-resistant stainless steel foil for catalyst-carrier of combustion exhaust gas purifiers | |
CA2088065C (en) | Controlled thermal expansion alloy and article made therefrom | |
JPH0321622B2 (de) | ||
EP0374507A1 (de) | Hochtemperaturlegierung auf Niobbasis | |
US4456481A (en) | Hot workability of age hardenable nickel base alloys | |
JPH06184700A (ja) | 高強度非磁性低熱膨張合金 | |
US3816111A (en) | Chromium-base alloy for making a chill-mold and a process of making same | |
GB2083499A (en) | Austenitic steel | |
JPH0621303B2 (ja) | 低酸素Ti合金の製造方法 | |
JPH03134144A (ja) | ニッケル基合金部材およびその製造方法 | |
JPH04502938A (ja) | 鉄,ニッケル,クロム基材合金 | |
JPS58150119A (ja) | 磁気記録再生ヘツド用高透磁率合金およびその製造法ならびに磁気記録再生ヘツド | |
JPH08311620A (ja) | 熱間加工性及び耐溶融塩腐食性に優れたステンレス鋼 | |
JP2776593B2 (ja) | チタン・アルミニウム金属間化合物の結晶粒微細化方法 | |
JPS62278248A (ja) | 耐酸化性Fe−Cr−Al系合金 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB SE |
|
17P | Request for examination filed |
Effective date: 19820109 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SHEFFIELD FORGEMASTERS LIMITED |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB SE |
|
REF | Corresponds to: |
Ref document number: 3168563 Country of ref document: DE Date of ref document: 19850314 |
|
ET | Fr: translation filed | ||
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
26 | Opposition filed |
Opponent name: THYSSEN EDELSTAHLWERKE AG Effective date: 19851023 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732 |
|
PLBM | Termination of opposition procedure: date of legal effect published |
Free format text: ORIGINAL CODE: 0009276 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: OPPOSITION PROCEDURE CLOSED |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP |
|
27C | Opposition proceedings terminated |
Effective date: 19860801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19880227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19881101 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19881118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19891027 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 81300793.7 Effective date: 19880927 |