WO2003057932A1 - Alliage resistant a la chaleur et a l'oxydation a haute temperature et procede de production dudit alliage - Google Patents

Alliage resistant a la chaleur et a l'oxydation a haute temperature et procede de production dudit alliage Download PDF

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Publication number
WO2003057932A1
WO2003057932A1 PCT/EP2003/000106 EP0300106W WO03057932A1 WO 2003057932 A1 WO2003057932 A1 WO 2003057932A1 EP 0300106 W EP0300106 W EP 0300106W WO 03057932 A1 WO03057932 A1 WO 03057932A1
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WO
WIPO (PCT)
Prior art keywords
alloy
alloy according
mass
resistant
component
Prior art date
Application number
PCT/EP2003/000106
Other languages
German (de)
English (en)
Inventor
Rolf-Dieter Grosskopf
Peter Fischer
Ralf Hojda
Angelika Kolb-Telieps
Original Assignee
Thyssenkrupp Vdm Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thyssenkrupp Vdm Gmbh filed Critical Thyssenkrupp Vdm Gmbh
Priority to AU2003206701A priority Critical patent/AU2003206701A1/en
Publication of WO2003057932A1 publication Critical patent/WO2003057932A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/86—Chromium
    • B01J23/866—Nickel and chromium
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding

Definitions

  • the invention relates to a heat-resistant and high-temperature oxidation-resistant alloy with essential components of Ni, Cr, Al, Fe.
  • Metallic foils that are thinner than 40 ⁇ m are used for special applications in automotive exhaust gas catalysts.
  • the austenitic nickel base materials which are heat-resistant, but strongly oxidize at temperatures> 1000 ° C, which can occur in the catalytic converter in extreme cases. They usually build up chromium oxide layers.
  • this problem can be solved for alloys with a high nickel content by adding reactive elements to a certain extent, e.g. is described in DE-A 44 1 1 228.
  • Such materials often contain higher levels of carbon and nitrogen, which makes them unsuitable for film rolling due to their strong solidification. In the example given, it is 0.001-0.15 mass% carbon and 0.25-1.2 mass% nitrogen. They also usually contain more than 50% by mass of nickel, which makes them expensive. In DE-A 44 1 1 228 it is about 65% by mass of nickel.
  • EP-A 0 801 140 an attempt is made to use an alloy with 30-35% Ni, 14-18% Cr, 0.5-1.5% Nb + Ta, 2-3% Ti, 0.8-1.5 % AI, 0.2 - 0.5% Mn and contents of Ni, Ca and Mg can be processed via the block casting - hot forming - cold forming process.
  • the oxidation tests described in the application were carried out at only 850 ° C., a temperature which is sufficient for use in the diesel engine, but is well below the maximum temperature of the exhaust line in the gasoline engine. This is especially true because for reasons of speed Starting behavior of the catalyst is placed as close as possible to the engine.
  • the invention is therefore based on the object of developing an inexpensive, homogeneous material with a high-temperature oxidation resistance comparable to that of iron-chromium-aluminum alloys, but at 1000 ° C. by at least 50% higher heat resistance, which, according to conventional casting technology, is followed by hot and Cold forming can be produced.
  • composition (in% by mass)
  • a preferred alloy is characterized by the following composition (in% by mass)
  • Another alternative alloy is characterized by the following composition (in mass%)
  • Another preferred alloy is characterized by the following composition (in% by mass)
  • the sum of Cr + AI is advantageously ⁇ 28% and the sum of Y + Hf + Zr ⁇ 0.15%.
  • a method for producing an alloy according to the invention is characterized in that the alloy is produced after its melting via ingot or continuous casting and hot and cold rolling with intermediate annealing (s) required as required.
  • the alloy produced in this way is advantageously solution-annealed in the temperature range from 1000 ° C. to 1200 ° C. before it is finally used.
  • the nickel content should preferably be below 40% by mass in order to hinder the formation of intermetallic phases of the Ni-Al type.
  • susceptibility to cracking can be reduced by specifying an upper limit of 0.1 5% by mass for manganese.
  • the chromium content must be above 15% by mass so that covering layers can form at the beginning of oxidation, which prevent the penetration of nitrogen and thus the formation of nitride.
  • Aluminum contents of at least 4% by mass are also essential in order to allow the protective influence of the aluminum oxide to take effect. For reasons of manufacturability, the total content of aluminum and chromium should not exceed 28% by mass. To the one you want
  • compositions are given in Table 1.
  • the exemplary alloys were melted as laboratory batches (LB), cast into blocks and hot rolled on 4.5 mm or 5 mm.
  • hot forming was quite possible.
  • edge cracks or surface breaks led to edge cracks or surface breaks.
  • yttrium which Counteracting oxidation damage at high temperatures must be done within narrow limits, since even high yttrium contents affect the forming. In particular, this also applies to the sum of the reactive elements yttrium, hafnium and zircon.
  • the yield strength of the alloys according to the invention was determined to be 50 MPa on average at 1000 ° C., which means an increase of about 60% and in particular for conventional Fe-Cr-Al alloys the use as a metallic catalyst carrier in automobiles is promising.
  • Figure 2 shows the specific change in mass of Examples LB 895 and 151007 after aging in air at 1,100 ° C.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Silencers (AREA)
  • Catalysts (AREA)

Abstract

Alliage résistant à la chaleur et à l'oxydation à haute température qui contient (en pourcentage en masse) 30 à 40 % de Ni, 15 à 23 % de Cr, 4 à 8 % de Al, 0,01 à 0,07 % de Y et / ou de Hf et / ou de Zr, < 0,15 % de Mn, le reste étant constitué par Fe et les impuretés liées à la production de l'acier.
PCT/EP2003/000106 2002-01-09 2003-01-08 Alliage resistant a la chaleur et a l'oxydation a haute temperature et procede de production dudit alliage WO2003057932A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003206701A AU2003206701A1 (en) 2002-01-09 2003-01-08 Heat-resistant and high-temperature-oxidation-resistant alloy, in addition to method for the production of said alloy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10200463 2002-01-09
DE10200463.3 2002-01-09

Publications (1)

Publication Number Publication Date
WO2003057932A1 true WO2003057932A1 (fr) 2003-07-17

Family

ID=7711692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/000106 WO2003057932A1 (fr) 2002-01-09 2003-01-08 Alliage resistant a la chaleur et a l'oxydation a haute temperature et procede de production dudit alliage

Country Status (3)

Country Link
AU (1) AU2003206701A1 (fr)
TW (1) TW200301784A (fr)
WO (1) WO2003057932A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648968A1 (de) * 1975-10-29 1977-05-05 Nippon Steel Corp Hitzebestaendiger rostfreier stahl
EP0093661A1 (fr) * 1982-04-29 1983-11-09 Imphy S.A. Alliage de type fer-nickel-chrome-aluminium-terre rare
EP0497992A1 (fr) * 1989-05-16 1992-08-12 Nippon Steel Corporation Feuille mince en acier inoxydable pour substrat de catalyseur pour le traitement des gaz d'échappement d'automobiles et son procédé de fabrication
DE19957646A1 (de) * 1999-11-30 2001-05-31 Krupp Vdm Gmbh Verfahren zur Herstellung einer warmfesten Legierung mit guter Hochtemperaturoxidationsbeständigkeit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648968A1 (de) * 1975-10-29 1977-05-05 Nippon Steel Corp Hitzebestaendiger rostfreier stahl
EP0093661A1 (fr) * 1982-04-29 1983-11-09 Imphy S.A. Alliage de type fer-nickel-chrome-aluminium-terre rare
EP0497992A1 (fr) * 1989-05-16 1992-08-12 Nippon Steel Corporation Feuille mince en acier inoxydable pour substrat de catalyseur pour le traitement des gaz d'échappement d'automobiles et son procédé de fabrication
DE19957646A1 (de) * 1999-11-30 2001-05-31 Krupp Vdm Gmbh Verfahren zur Herstellung einer warmfesten Legierung mit guter Hochtemperaturoxidationsbeständigkeit

Also Published As

Publication number Publication date
AU2003206701A1 (en) 2003-07-24
TW200301784A (en) 2003-07-16

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