EP0709478B1 - Alliage à base de siliciures, contenant du chrome et du molybdène - Google Patents

Alliage à base de siliciures, contenant du chrome et du molybdène Download PDF

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Publication number
EP0709478B1
EP0709478B1 EP94116323A EP94116323A EP0709478B1 EP 0709478 B1 EP0709478 B1 EP 0709478B1 EP 94116323 A EP94116323 A EP 94116323A EP 94116323 A EP94116323 A EP 94116323A EP 0709478 B1 EP0709478 B1 EP 0709478B1
Authority
EP
European Patent Office
Prior art keywords
alloy
molybdenum
chromium
silicides
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
Application number
EP94116323A
Other languages
German (de)
English (en)
Other versions
EP0709478A1 (fr
Inventor
Mohamed Dr. Nazmy
Corrado Noseda
Markus Staubli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB AG Germany
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Priority to DE59408967T priority Critical patent/DE59408967D1/de
Priority to EP94116323A priority patent/EP0709478B1/fr
Priority to US08/530,091 priority patent/US5718867A/en
Priority to JP7249839A priority patent/JPH08170143A/ja
Priority to CN95118431A priority patent/CN1044009C/zh
Publication of EP0709478A1 publication Critical patent/EP0709478A1/fr
Application granted granted Critical
Publication of EP0709478B1 publication Critical patent/EP0709478B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/06—Alloys based on chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/18—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on silicides

Definitions

  • Alloys based on at least chromium and molybdenum containing silicides stand out at high temperatures due to high oxidation and corrosion resistance from and can in high thermal, oxidizing and / or parts exposed to corrosive effects of thermal Machines are used.
  • these alloys are compared to the commonly used Nickel-based superalloys have a lower density.
  • An oxidation and corrosion resistant alloy on the Basis of a silicide containing at least chromium and molybdenum is described in EP 0 425 972 B1.
  • This alloy has in preferred embodiments have a chromium content of 60 and more Atomic percent and then stands out with good oxidation and Corrosion resistance due to a high mechanical Strength at temperatures up to 1000 ° C. For certain The oxidation resistance is sufficient for practical applications However, this alloy is not yet sufficient.
  • WO-A-93 07302 there is an oxidation-resistant alloy described, which is formed by a molybdenum and / or tungsten Contains refractory metal, silicon and / or aluminum and chromium.
  • This alloy preferably has a composition with a chromium content of 25 to 83 percent by weight, an aluminum and / or Silicon content of 2 to 20 weight percent and one Molybdenum and / or tungsten content of at least 23 Percent by weight.
  • the invention as set out in claim 1 lies the task of an alloy based on a to develop at least chromium and molybdenum-containing silicides, which is excellent at temperatures of more than 1000 ° C Resistance to oxidation and good mechanical properties having.
  • the alloy according to the invention is characterized in that based on comparable known alloys of a silicide containing at least chromium and molybdenum Temperatures around 1250 ° C a significantly improved Has oxidation resistance. Their ductility is also sufficient and mechanical strength at high temperatures Suitability as a construction material in components that are used in oxidizing and / or corrosive atmosphere temperatures of 1000 to 1400 ° C exposed, particularly favorable.
  • the Alloy according to the invention can also be inexpensive be produced by melting and casting.
  • alloys with the composition given in the table below were atomized in percent by atom from the elements present in predetermined stoichiometric ratios.
  • D E F G chrome 60 60 51 50 50 40 53 molybdenum 15 15 14 15 15 30th 13 Silicon 25th 25th 35 30th 30th 30th 34 tungsten - - - 5 5 - - yttrium - 0.05 - - 0.02 0.02 -
  • the melts were cast into castings with a diameter of approx. 40 mm and a height of approx. 50 mm, from which platelets with a surface area of approx. 1 cm 2 and a thickness of approx. 1-2 mm were used to determine the oxidation resistance and test specimens for upsetting - and creep tests made.
  • Alloys A - F made from the castings were heated to 1250 ° C. in air.
  • the mass loss or mass increase caused by oxidation and / or corrosion of each of the platelets was determined thermogravimetrically after 12 hours 40 minutes and sometimes also after 100 hours.
  • the loss of mass or the increase in mass ⁇ W [mg] based on the size of the surface A 0 [cm 2 ] of each of the platelets, is then a measure of the oxidation and corrosion resistance of the alloys A - F and is summarized in the table below.
  • Alloys A, B, C and G served as Comparative alloys. Alloys A and B clearly show compared to the alloys C - F a significantly reduced Resistance to oxidation and corrosion. A special one favorable oxidation resistance shows that with the Embodiment 5 according to the prior art according to WO-A-93 07302 comparable alloy C, whose mass loss or Mass growth between 12h 40min and 100h only slightly changes.
  • Modifications of the have good oxidation resistance Alloy C on which the chromium content is less than 55, preferably less than 53, and greater than 41, preferably greater than 48, Atomic percent, the molybdenum content less than 35, preferably less than 20 and more than 13 atomic percent and the silicon content less than 35 and greater than 25, preferably greater than 30, atomic percent is. Also variations of alloy F, with 35 - 55B atomic percent Chromium, 13-35 atomic percent molybdenum, 25-35 atomic percent silicon, 0.001-0.3 atomic percent Yttrium and / or 0 -10 atomic percent tungsten have one more sufficiently good resistance to oxidation. By alloying of tungsten and / or yttrium to the slightly modified Alloy C (Alloys D and E) became the oxidation resistance somewhat reduced compared to alloy C, but at the same time, it has particularly good mechanical strength reached.
  • Alloy C Alloys D and E
  • test specimens for the creep tests were set at 1300 ° C heated up and at this temperature the true creep rate in Dependence on the true voltage determined. Here showed by adding tungsten and / or yttrium the creep resistance is doubled or even tripled.
  • the ductility of the alloy according to the invention was determined indirectly on the basis of compression tests.
  • the test specimens intended for compression tests were compressed at temperatures of 1100, 1200, 1300 and 1400 ° C and the compression pressure at the 0.2% proof stress was determined at every temperature. This resulted in the compression pressure values summarized in the following table: Temperature [° C] Pressure at the 0.2% proof stress [MPa] alloy C.
  • D E G 1100 795 - - - 1200 507 - - 625 1300 351 374 601 396 1400 204 199 348 214
  • Tungsten and / or yttrium is one 0.2% elongation only at a temperature of 1300 ° C, however, by alloying 2 to 8 atomic percent Tungsten and especially by alloying from 2 to 8 Atomic percent tungsten and 0.001 to 0.3 atomic percent yttrium Alloy C or a preferably modified alloy with 48-53 chromium, 13-20 molybdenum and 30-35 silicon one achieved particularly high strength.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Powder Metallurgy (AREA)
  • Supercharger (AREA)

Claims (4)

  1. Alliage à base d'un siliciure contenant au moins du chrome et du molybdène, qui se compose des constituants suivants en pour cent atomique:
    35 - 55 de chrome
    13 - 35 de molybdène
    25 - 35 de silicium et
    0,001- 0,3 d'yttrium et/ou
    0,001- 10 de tungstène.
  2. Alliage selon la revendication 1, caractérisé en ce qu'il se compose des constituants suivants en pour cent atomique:
    48 - 53 de chrome
    13 - 20 de molybdène
    30 - 35 de silicium et
    0,001- 0,3 d'yttrium et/ou
    0,001- 10 de tungstène.
  3. Alliage selon la revendication 2, caractérisé en ce qu'il présente 2 - 8 pour cent atomique de tungstène.
  4. Alliage selon la revendication 3, caractérisé en ce qu'il présente 0,001 - 0,3 pour cent atomique d'yttrium.
EP94116323A 1994-10-17 1994-10-17 Alliage à base de siliciures, contenant du chrome et du molybdène Expired - Lifetime EP0709478B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59408967T DE59408967D1 (de) 1994-10-17 1994-10-17 Legierung auf der Basis eines zumindest Chrom und Molybdän enthaltenden Silicids
EP94116323A EP0709478B1 (fr) 1994-10-17 1994-10-17 Alliage à base de siliciures, contenant du chrome et du molybdène
US08/530,091 US5718867A (en) 1994-10-17 1995-09-19 Alloy based on a silicide containing at least chromium and molybdenum
JP7249839A JPH08170143A (ja) 1994-10-17 1995-09-27 少なくともクロムとモリブデンを含む珪化物をベースとする合金
CN95118431A CN1044009C (zh) 1994-10-17 1995-10-17 以至少一种铬和钼为基础的包含硅化物的合金

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94116323A EP0709478B1 (fr) 1994-10-17 1994-10-17 Alliage à base de siliciures, contenant du chrome et du molybdène

Publications (2)

Publication Number Publication Date
EP0709478A1 EP0709478A1 (fr) 1996-05-01
EP0709478B1 true EP0709478B1 (fr) 1999-12-01

Family

ID=8216390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116323A Expired - Lifetime EP0709478B1 (fr) 1994-10-17 1994-10-17 Alliage à base de siliciures, contenant du chrome et du molybdène

Country Status (5)

Country Link
US (1) US5718867A (fr)
EP (1) EP0709478B1 (fr)
JP (1) JPH08170143A (fr)
CN (1) CN1044009C (fr)
DE (1) DE59408967D1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2160790C2 (ru) * 1998-07-07 2000-12-20 Институт физики твердого тела РАН Композиционный жаропрочный и жаростойкий материал
CN100460111C (zh) * 2007-01-04 2009-02-11 北京科技大学 一种高强度的二硅化钼复合材料及其制备方法
KR20100013859A (ko) 2008-08-01 2010-02-10 삼성디지털이미징 주식회사 디지털 영상 처리기에서 렌즈의 ｍｔｆ 특성을 이용한포커스 조정 장치 및 방법
US9540714B2 (en) 2013-03-15 2017-01-10 Ut-Battelle, Llc High strength alloys for high temperature service in liquid-salt cooled energy systems
US9377245B2 (en) 2013-03-15 2016-06-28 Ut-Battelle, Llc Heat exchanger life extension via in-situ reconditioning
US10017842B2 (en) 2013-08-05 2018-07-10 Ut-Battelle, Llc Creep-resistant, cobalt-containing alloys for high temperature, liquid-salt heat exchanger systems
US9435011B2 (en) 2013-08-08 2016-09-06 Ut-Battelle, Llc Creep-resistant, cobalt-free alloys for high temperature, liquid-salt heat exchanger systems
US9683280B2 (en) 2014-01-10 2017-06-20 Ut-Battelle, Llc Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems
US9683279B2 (en) 2014-05-15 2017-06-20 Ut-Battelle, Llc Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems
US9605565B2 (en) 2014-06-18 2017-03-28 Ut-Battelle, Llc Low-cost Fe—Ni—Cr alloys for high temperature valve applications

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1196974A (fr) * 1956-12-04 1959-11-27 Union Carbide Corp Composition et éléments et revêtements faits de cette composition
US3174853A (en) * 1962-03-15 1965-03-23 Gen Electric Chromium base alloys
CH679312A5 (fr) * 1989-11-03 1992-01-31 Asea Brown Boveri
WO1993007302A1 (fr) * 1991-10-10 1993-04-15 Battelle Memorial Institute Alliages metalliques refractaires resistants a l'oxydation
DE69321862T2 (de) * 1992-04-07 1999-05-12 Hashimoto, Koji, Sendai, Miyagi Temperatur resistente amorphe Legierungen
US5330590A (en) * 1993-05-26 1994-07-19 The United States Of America, As Represented By The Administrator Of The National Aeronautics & Space Administration High temperature creep and oxidation resistant chromium silicide matrix alloy containing molybdenum

Also Published As

Publication number Publication date
DE59408967D1 (de) 2000-01-05
CN1044009C (zh) 1999-07-07
JPH08170143A (ja) 1996-07-02
EP0709478A1 (fr) 1996-05-01
US5718867A (en) 1998-02-17
CN1130688A (zh) 1996-09-11

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