WO2005035812A1 - 銀含有の高延性クロム合金 - Google Patents
銀含有の高延性クロム合金 Download PDFInfo
- Publication number
- WO2005035812A1 WO2005035812A1 PCT/JP2004/015099 JP2004015099W WO2005035812A1 WO 2005035812 A1 WO2005035812 A1 WO 2005035812A1 JP 2004015099 W JP2004015099 W JP 2004015099W WO 2005035812 A1 WO2005035812 A1 WO 2005035812A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chromium
- alloy
- chromium alloy
- silver
- atomic
- Prior art date
Links
- 229910000599 Cr alloy Inorganic materials 0.000 title claims abstract description 40
- 239000000788 chromium alloy Substances 0.000 title claims abstract description 40
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 32
- 239000004332 silver Substances 0.000 title claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 43
- 239000000956 alloy Substances 0.000 claims abstract description 43
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 239000011651 chromium Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052702 rhenium Inorganic materials 0.000 claims description 5
- 238000005242 forging Methods 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 238000004663 powder metallurgy Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 11
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- 238000002844 melting Methods 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 27
- 238000007792 addition Methods 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 229910001316 Ag alloy Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000004455 differential thermal analysis Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910000995 CMSX-10 Inorganic materials 0.000 description 1
- 229910001011 CMSX-4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- RZVXOCDCIIFGGH-UHFFFAOYSA-N chromium gold Chemical compound [Cr].[Au] RZVXOCDCIIFGGH-UHFFFAOYSA-N 0.000 description 1
- GHZFPSVXDWJLSD-UHFFFAOYSA-N chromium silver Chemical compound [Cr].[Ag] GHZFPSVXDWJLSD-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
Definitions
- the invention of this application is useful for jet engines for aircraft, moving and stationary blades of industrial gas turbines, heat-resistant wheels of engine turbochargers for passenger cars, etc., and has excellent strength and oxidation resistance at high temperatures and room temperature. It relates to a new high-ductility chromium alloy with good ductility. Background art
- the nickel-base heat-resistant alloy used for the material of the rotor blades of this gas turbine exhibits high-temperature strength (creep, fatigue, etc.) due to precipitation strengthening by the a '(gamma prime) phase. Since the melting point is around 350, which is around 150, the service temperature remains at around 110 as described above even if cooling and coating techniques are used. Therefore, there is a demand for a heat-resistant alloy that can be used at higher temperatures instead of the conventional nickel-based heat-resistant alloy (for example, see Non-Patent Documents 116).
- chromium-based alloys have high melting points, have excellent corrosion resistance, oxidation resistance, good thermal conductivity, and have lower density than nickel-based alloys. It is expected as an alternative alloy (see Non-Patent Document 7).
- high ductile brittleness Room temperature embrittlement due to transition temperature and nitrogen absorption cannot overcome low ductility, low toughness and poor workability at room temperature. For this reason, it is not a substitute for Ni-based alloys. It has been found that when rhenium is added to a certain degree or more, ductility is exhibited. However, rhenium is extremely expensive as a rare metal, and the effect of its addition is not always at a practical level.
- Non-Patent Document 1 Aerosp. Sci. Technol. 3 (1999) 513-523
- Non-patent document 2 Journal of the Gas Turbine Society of Japan vol.28, No.4,
- Non-Patent Document 3 Journal of the Japan Institute of Metals Vol. 66, No. 9 (2002),
- Non-Patent Document 4 METALLURGICAL AND MATERIALS TRANSACTIONS A, Vol.
- Non-Patent Document 5 Scripta Materialia, 49 (2003) 1041-1046
- Non-Patent Document 6 Materia (Materia Japan), Vol. 42, No. 9
- Non-Patent Document 7 Industrial Materials, August 2002, 61-64 Therefore, the invention of this application is based on the background described above, and is based on chromium-based alloys as a practical alternative to Ni-based alloys. It is an object of the present invention to provide a new chromium alloy that utilizes the characteristics of the alloy, such as high melting point, excellent corrosion resistance, oxidation resistance, and thermal conductivity, and has good ductility at room temperature. Disclosure of the invention
- the composition contains 0.002 to 5 atomic% of silver, and the balance consists of chromium and unavoidable impurities.
- a chromium alloy characterized by: The second is a chromium alloy containing 0.1 to 5 atomic% of silver in the composition, and the third is a chromium alloy containing 0.5 to 3.5 atomic% of silver.
- a chromium alloy characterized by containing 0.05 to 10 atomic%.
- the composition of the alloy contains at least one of Mo, W, Re, Fe, Ru, Co, Rh, Ni, Pt, and Ir.
- the present invention provides a chromium alloy characterized by being contained at 10 atomic% or less.
- any of the above chromium alloys characterized by being manufactured by one or more means of single crystal solidification method, directional solidification method, powder metallurgy, forging and forging, Seventhly, the present invention provides a high-temperature article characterized by mainly comprising any of the above chromium alloys.
- FIG. 1 is a DTA thermograph for a Cr-15Ag alloy.
- Figure 2 shows the relationship between the tensile plastic strain (%) of the Cr-Ag alloy and the amount of Ag added.
- FIG. 3 is a graph showing 0.2% yield strength as a function of the temperature and the amount of Ag added.
- Figure 4 shows the oxidation resistance of the Cr-Ag alloy at 1100 * C in air.
- FIG. 5 is a diagram showing the oxidation resistance of a Cr-Ag alloy at 1300 in the atmosphere.
- the chromium alloy of the present invention maintains relatively low density, high melting point, good thermal conductivity and sufficient ductility at room temperature by adding silver to chromium.
- a chromium-based heat-resistant alloy having In order to improve the ductility at room temperature, silver should be
- the addition amount of silver is in the range of 0.002 to 5 atomic%, preferably 0.1 to 5 atomic%, from the balance between ductility and strength. Further, the content is preferably set to 0.5 to 3.5 atomic%.
- the chromium alloy of the invention of this application has a single-phase structure from room temperature to a high temperature (at 160.degree.), And the strength is developed by solid solution strengthening by adding silver. In addition, the oxidation resistance is significantly better than that of chromium alone at high temperatures (1300).
- silicon and aluminum can be contained as described above.
- the addition of these elements is effective for further improving the oxidation resistance. However, if the addition amount is too large, the ductility is reduced. Therefore, the addition in the above range is considered.
- the addition of Mo, W, Fe, Co, and Rh may be considered to improve the strength, but an excessive amount of addition will lead to a decrease in ductility.
- the addition of Ru, Pt, and Ni can be considered to improve ductility, but if it is excessive, the density increases and the strength decreases.
- the addition of Re and Ir is considered to improve the ductility as well as the strength. However, if it is excessive, the density is increased, which is not preferable.
- the total amount of these elements should be kept below 10 atomic% as described above.
- Each of the chromium-silver alloys (alloyl-6) having the compositions shown in Table 1 below was produced by arc melting.
- Alloys 2 to 6 are the same as those of Alloy 1. Is shown.
- FIG. 1 shows that a chromium alloy (alloy6) containing 5 atomic% of silver was heated from room temperature to 1600 at a rate of ⁇ ⁇ ⁇ ⁇ ⁇ , and then cooled to room temperature.
- FIG. 4 shows a typical differential thermal analysis (DTA) thermograph during a thermal cycle. From the results shown in Fig. 1, it was found that a single phase was formed in the temperature range from room temperature to 1600.
- DTA differential thermal analysis
- Figure 2 shows the tensile plastic strain (%) of a silver-added chromium alloy (alloyl to 6) when a plate specimen of length 12 ⁇ width 5 ⁇ thickness 1 (mm) was statically pulled at room temperature. ) And the amount of silver added (atomic%).
- the chromium alloy containing 2 atomic% of silver shows about 24% elongation at room temperature.
- Fig. 2 shows that a chromium alloy with 2 to 3.4 atomic% of silver shows an elongation of 24% or more at room temperature and a silver of 0.5 atomic% or more at room temperature. It is confirmed that the chromium alloy shows an elongation of 13% or more at room temperature. In the case of 0.02 atomic% of silver, a 5% elongation was confirmed. It is said that a practical structural alloy must have a tensile ductility (elongation) of 2% or more at room temperature. However, the chromium alloy containing 0.002 at. It has already reached 2% ductility.
- the silver-containing chromium alloy of the invention of the present application which has an excellent property of having a ductility at room temperature of 10 to 24% in a range of 0.5 to 3.5 atomic%, which is preferable as a silver addition amount, is suitable for practical use.
- CMSX-4, CMSX-10 which are Ni-base heat-resistant alloys as alloys, and TMS-75, a Ni-base alloy TMS-75 that has almost the same or better performance as the CMS X alloy developed by the present inventors.
- the ductility at room temperature is at most 6 to 7%, it can be seen that it has sufficient and remarkable tensile ductility at room temperature.
- Figure 3 shows the relationship between 0.2% yield strength and silver loading in the temperature range from room temperature to 1400. It can be seen that the yield strength increases with solid solution strengthening as the amount of silver added increases, and that the alloy containing 5 atomic% of silver (alloy 6) increases at room temperature by almost 50% compared to chromium alone. At higher temperatures, the effect of solid solution strengthening by the addition of silver decreases, but even at 1400, the value is larger than that of chromium alone.
- the yield strength (0.2% resistance) of 1000 is 5 OMPa or more at 1000, 1200 to 20-30 MPa or more, and 1400 X is 10 MPa or more. This is one of the important features of the silver-containing chromium alloy of the invention.
- the conventional Ni-based heat-resistant alloy cannot be used at 1200 or more, whereas the alloy of the invention of this application can be used sufficiently.
- Figures 4 and 5 show the oxidation resistance of 0.5 atomic% silver-containing chromium alloy (alloy3) and 2 atomic% silver-containing chromium alloy (alloy5) at 1100 in air and 1300 in air.
- FIG. 6 is a diagram showing the test results of the test in comparison with the case of chromium containing no silver. As can be seen in FIGS. 4 and 5, the alloy containing 2 atomic% of silver (alloy5) showed excellent oxidation resistance at 1,300 in the atmosphere.
- Example 2 In the same manner as in Example 1, an alloy having the composition shown in Table 2 was produced by arc melting.
- Alloys 8 to 11 are the same as those in Alloy 7.
- alloy 9 Cr-6Si-2Ag
- alloyll Cr-6Ir-2Ag
- Table 3 shows the measurement results of the mechanical properties (0.2% yield strength, tensile strength and elongation) of the alloys in Table 2 at room temperature. It is confirmed that the alloy of the invention of this application has improved room temperature ductility and markedly improved mechanical properties.
- the chromium alloy of the invention of this application is the first chromium-based alloy having sufficient room-temperature tensile ductility for structural use, and has high strength and resistance to high temperatures. Because of its excellent oxidizing properties, it can be expected to be put to practical use as heat-resistant parts, mainly for blade materials for gas turbines. No special standards are required for raw material purity, production method, etc. It is a revolutionary alternative to nickel-base heat-resistant alloys. Industrial applicability
- the invention of this application can be used as a practical alternative to the conventional Ni-based alloy, taking advantage of the features of chromium-based alloy such as high melting point, excellent corrosion resistance, oxidation resistance, and thermal conductivity. Further, a new chromium alloy having good ductility at room temperature is provided.
- the chromium alloy is also used for various applications such as moving and stationary blades of air jet engines and industrial gas turbines, intake and exhaust valves, rocker arms, connecting rods, and heat-resistant wheels of autopi and Yuichi Pochija for automobile engines. Are provided.
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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)
- Supercharger (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/575,548 US20070003428A1 (en) | 2003-10-10 | 2004-10-06 | Highly ductile chromium alloy containing silver |
EP04792339A EP1681361A4 (en) | 2003-10-10 | 2004-10-06 | HIGHLY DUCTILE CHROME ALLOY CONTAINING SILVER |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-352506 | 2003-10-10 | ||
JP2003352506A JP4061407B2 (ja) | 2003-10-10 | 2003-10-10 | 耐熱部品用クロム合金 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005035812A1 true WO2005035812A1 (ja) | 2005-04-21 |
Family
ID=34431113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/015099 WO2005035812A1 (ja) | 2003-10-10 | 2004-10-06 | 銀含有の高延性クロム合金 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070003428A1 (ja) |
EP (1) | EP1681361A4 (ja) |
JP (1) | JP4061407B2 (ja) |
WO (1) | WO2005035812A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8425836B1 (en) | 2011-11-16 | 2013-04-23 | Rolls-Royce Plc | Chromium alloy |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01138092A (ja) * | 1987-11-25 | 1989-05-30 | Tosoh Corp | 溶加材 |
US5126106A (en) * | 1990-05-22 | 1992-06-30 | Tosoh Corporation | Chromium-based weld material and rolled article and process for producing the rolled article |
JPH0995751A (ja) * | 1995-10-03 | 1997-04-08 | Res Inst Electric Magnetic Alloys | cr基合金薄膜およびその製造法ならびにストレインゲージ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB943228A (en) * | 1956-10-22 | 1963-12-04 | Commw Of Australia | Improved chromium-tungsten-silicon alloys |
US3239335A (en) * | 1963-10-11 | 1966-03-08 | Carlson Oscar Norman | Ductile binary chromium alloy |
SU580246A1 (ru) * | 1975-10-28 | 1977-11-15 | Институт Металлофизики Академии Наук Украинской Сср | Сплав на основе хрома |
JP2607157B2 (ja) * | 1989-11-17 | 1997-05-07 | 株式会社クボタ | 加熱炉内の被加熱鋼材支持部材用耐熱合金 |
JPH04276068A (ja) * | 1991-03-04 | 1992-10-01 | Daido Steel Co Ltd | スパッタリング用ターゲットの製造方法 |
JPH0849085A (ja) * | 1994-08-08 | 1996-02-20 | Nisshin Steel Co Ltd | 抗菌性ステンレス鋼板及びその製造方法 |
JPH08134665A (ja) * | 1994-11-11 | 1996-05-28 | Nisshin Steel Co Ltd | 抗菌性ステンレス鋼板の製造方法 |
JP2000258095A (ja) * | 1999-03-09 | 2000-09-22 | Kubota Corp | 高温ガス炉の熱交換器用チューブ |
-
2003
- 2003-10-10 JP JP2003352506A patent/JP4061407B2/ja not_active Expired - Lifetime
-
2004
- 2004-10-06 EP EP04792339A patent/EP1681361A4/en not_active Withdrawn
- 2004-10-06 WO PCT/JP2004/015099 patent/WO2005035812A1/ja active Application Filing
- 2004-10-06 US US10/575,548 patent/US20070003428A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01138092A (ja) * | 1987-11-25 | 1989-05-30 | Tosoh Corp | 溶加材 |
US5126106A (en) * | 1990-05-22 | 1992-06-30 | Tosoh Corporation | Chromium-based weld material and rolled article and process for producing the rolled article |
JPH0995751A (ja) * | 1995-10-03 | 1997-04-08 | Res Inst Electric Magnetic Alloys | cr基合金薄膜およびその製造法ならびにストレインゲージ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1681361A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP4061407B2 (ja) | 2008-03-19 |
JP2005113251A (ja) | 2005-04-28 |
US20070003428A1 (en) | 2007-01-04 |
EP1681361A1 (en) | 2006-07-19 |
EP1681361A4 (en) | 2008-04-23 |
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