EP1808504A1 - Fonte de fer avec cobalt et son utilisation dans une turbine à vapeur - Google Patents

Fonte de fer avec cobalt et son utilisation dans une turbine à vapeur Download PDF

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Publication number
EP1808504A1
EP1808504A1 EP06000851A EP06000851A EP1808504A1 EP 1808504 A1 EP1808504 A1 EP 1808504A1 EP 06000851 A EP06000851 A EP 06000851A EP 06000851 A EP06000851 A EP 06000851A EP 1808504 A1 EP1808504 A1 EP 1808504A1
Authority
EP
European Patent Office
Prior art keywords
alloy according
cobalt
silicon
alloy
turbine
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.)
Withdrawn
Application number
EP06000851A
Other languages
German (de)
English (en)
Inventor
Stefan Dr. Janssen
Shilun Dr. Sheng
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP06000851A priority Critical patent/EP1808504A1/fr
Priority to EP07703621.8A priority patent/EP1974068B1/fr
Priority to US12/087,797 priority patent/US20100178192A1/en
Priority to CNA2007800032053A priority patent/CN101400812A/zh
Priority to PCT/EP2007/050057 priority patent/WO2007082788A1/fr
Publication of EP1808504A1 publication Critical patent/EP1808504A1/fr
Withdrawn legal-status Critical Current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
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/04—Cast-iron alloys containing spheroidal graphite

Definitions

  • the invention relates to a cast iron with cobalt according to claim 1 and a component according to claim 30.
  • the known and used cast iron alloys (so-called GJS ductile iron alloys) mainly use silicon and molybdenum to increase creep resistance, scale resistance and creep rupture strength.
  • GJS ductile iron alloys mainly use silicon and molybdenum to increase creep resistance, scale resistance and creep rupture strength.
  • these elements lead to a significant drop in toughness over time.
  • Molybdenum also shows a very large tendency to segregation.
  • the object is achieved by an alloy according to claim 1 and a component according to claim 30.
  • the proportion of silicon, cobalt and molybdenum is ⁇ 7.5 wt%.
  • the proportion of cobalt in the alloy is between 0.5wt% to 1.5wt% cobalt.
  • the alloy can have further elements.
  • the alloy consists of iron, silicon, cobalt and carbon.
  • the alloy consists of iron, silicon, cobalt, carbon and manganese. Further advantages result from an alloy consisting of iron, silicon, cobalt, carbon and optional admixtures of molybdenum, manganese and / or nickel.
  • Figure 2 shows the influence of cobalt on the mechanical properties of the alloy, which are shown in the following table (in wt%).
  • the elongation at break R p02 increases from 271N / mm 2 to 284N / mm 2
  • the tensile strength Rm increases from 403N / mm 2 to 412N / mm 2 .
  • the elongation at break A5 increases from 15.5% to 21.9%.
  • the fracture rate Z increases from 13.8% to 29.5%.
  • Even small amounts of cobalt (0.5wt% to 1.0wt% or 1.0wt% to 1.5wt%) improve the mechanical properties.
  • FIG. 3 shows a steam turbine 300, 303 with a turbine shaft 309 extending along a rotation axis 306.
  • the steam turbine has a high-pressure turbine section 300 and a medium-pressure turbine section 303, each having an inner housing 312 and an outer housing 315 enclosing this.
  • the high-pressure turbine part 300 is designed, for example, in Topfbauart.
  • the medium-pressure turbine part 303 is designed, for example, double-flow. It is also possible for the medium-pressure turbine section 303 to be single-flow.
  • a bearing 318 is arranged between the high-pressure turbine section 300 and the medium-pressure turbine section 303, the turbine shaft 309 having a bearing region 321 in the bearing 318.
  • the turbine shaft 309 is supported on another bearing 324 adjacent to the high pressure turbine sub 300.
  • the high-pressure turbine section 300 has a shaft seal 345.
  • the turbine shaft 309 is sealed from the outer housing 315 of the medium-pressure turbine section 303 by two further shaft seals 345.
  • the turbine shaft 309 in the high-pressure turbine section 300 has the high-pressure impeller blade 357. This high-pressure blading 357, together with the associated blades, not shown, represents a first blading region 360.
  • the medium-pressure turbine part 303 has a central steam inflow region 333. Associated with the steam inflow region 333, the turbine shaft 309 has a radially symmetrical shaft shield 363, a cover plate, on the one hand for dividing the steam flow into the two flows of the medium-pressure turbine section 303 and for preventing direct contact of the hot steam with the turbine shaft 309.
  • the turbine shaft 309 has in the medium-pressure turbine section 303 a second blading area 366 with the medium-pressure blades 354 on. The hot steam flowing through the second blading area 366 flows out of the medium-pressure turbine section 303 from a discharge connection 369 to a downstream low-pressure turbine, not shown.
  • the turbine shaft 309 is composed for example of two partial turbine shafts 309a and 309b, which are fixedly connected to one another in the region of the bearing 318.
  • Each turbine shaft 309a, 309b has a cooling line 372 formed as a central bore 372a along the axis of rotation 306.
  • the cooling line 372 is connected to the steam outlet region 351 via an inflow line 375 having a radial bore 375a.
  • the coolant line 372 is connected to a cavity not shown below the shaft shield.
  • the feed lines 375 are configured as a radial bore 375a, allowing "cold" steam from the high pressure turbine section 300 to flow into the central bore 372a.
  • the vapor passes through the storage area 321 into the medium-pressure turbine section 303 and there to the mantle surface 330 of the turbine shaft 309 in the steam inflow area 333.
  • the steam flowing through the cooling line has a significantly lower temperature as the reheated steam flowing into the Dampfeinström Siemens 333, so that an effective cooling of the first blade rows 342 of the medium-pressure turbine section 303 and the mantle surface 330 is ensured in the region of these blade rows 342.
  • FIG. 4 shows by way of example a gas turbine 100 in a longitudinal partial section.
  • the gas turbine 100 has inside a rotatably mounted about a rotation axis 102 rotor 103 with a shaft 101, which is also referred to as a turbine runner.
  • an intake housing 104 a compressor 105, for example, a toroidal combustion chamber 110, in particular annular combustion chamber, with a plurality of coaxially arranged burners 107, a turbine 108 and the exhaust housing 109th
  • a compressor 105 for example, a toroidal combustion chamber 110, in particular annular combustion chamber, with a plurality of coaxially arranged burners 107, a turbine 108 and the exhaust housing 109th
  • the annular combustion chamber 110 communicates with an annular annular hot gas channel 111, for example.
  • annular annular hot gas channel 111 for example.
  • turbine stages 112 connected in series form the turbine 108.
  • Each turbine stage 112 is formed, for example, from two blade rings. As seen in the direction of flow of a working medium 113, in the hot gas channel 111 of a row of guide vanes 115, a series 125 formed of rotor blades 120 follows.
  • the guide vanes 130 are fastened to an inner housing 138 of a stator 143, whereas the moving blades 120 of a row 125 are attached to the rotor 103 by means of a turbine disk 133, for example.
  • air 105 is sucked in and compressed by the compressor 105 through the intake housing 104.
  • the compressed air provided at the turbine-side end of the compressor 105 is supplied to the burners 107 where it is mixed with a fuel.
  • the mixture is then burned to form the working fluid 113 in the combustion chamber 110.
  • the working medium 113 flows along the hot gas channel 111 past the guide vanes 130 and the rotor blades 120.
  • the working medium 113 expands in a pulse-transmitting manner, so that the rotor blades 120 drive the rotor 103 and drive the machine coupled to it.
  • the components exposed to the hot working medium 113 are subject to thermal during operation of the gas turbine 100 Charges.
  • the guide vanes 130 and rotor blades 120 of the first turbine stage 112, viewed in the flow direction of the working medium 113, are subjected to the greatest thermal stress in addition to the heat shield elements lining the annular combustion chamber 110.
  • substrates of the components may have a directional structure, i. they are monocrystalline (SX structure) or have only longitudinal grains (DS structure).
  • iron-, nickel- or cobalt-based superalloys are used as the material for the components, in particular for the turbine blade 120, 130 and components of the combustion chamber 110.
  • Such superalloys are for example from EP 1 204 776 B1 .
  • EP 1 306 454 .
  • the blades 120, 130 may be anti-corrosion coatings (MCrAlX; M is at least one element of the group iron (Fe), cobalt (Co), nickel (Ni), X is an active element and represents yttrium (Y) and / or silicon , Scandium (Sc) and / or at least one element of the rare earth or hafnium).
  • M is at least one element of the group iron (Fe), cobalt (Co), nickel (Ni)
  • X is an active element and represents yttrium (Y) and / or silicon , Scandium (Sc) and / or at least one element of the rare earth or hafnium).
  • Such alloys are known from the EP 0 486 489 B1 .
  • EP 0 412 397 B1 or EP 1 306 454 A1 which should be part of this disclosure in terms of chemical composition.
  • MCrA1X may still be present a thermal barrier coating, and consists for example of ZrO 2 , Y 2 O 3 -ZrO 2 , that is, it is not, partially or completely stabilized by yttria and / or calcium oxide and / or magnesium oxide.
  • the vane 130 has a guide vane foot (not shown here) facing the inner housing 138 of the turbine 108 and a vane head opposite the vane foot.
  • the vane head faces the rotor 103 and fixed to a mounting ring 140 of the stator 143.

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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)
EP06000851A 2006-01-16 2006-01-16 Fonte de fer avec cobalt et son utilisation dans une turbine à vapeur Withdrawn EP1808504A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP06000851A EP1808504A1 (fr) 2006-01-16 2006-01-16 Fonte de fer avec cobalt et son utilisation dans une turbine à vapeur
EP07703621.8A EP1974068B1 (fr) 2006-01-16 2007-01-03 Fonte contenant du cobalt et élément constitutif
US12/087,797 US20100178192A1 (en) 2006-01-16 2007-01-03 Cast Iron Comprising Cobalt and Component
CNA2007800032053A CN101400812A (zh) 2006-01-16 2007-01-03 含钴铸铁和构件
PCT/EP2007/050057 WO2007082788A1 (fr) 2006-01-16 2007-01-03 Fonte contenant du cobalt et élément constitutif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06000851A EP1808504A1 (fr) 2006-01-16 2006-01-16 Fonte de fer avec cobalt et son utilisation dans une turbine à vapeur

Publications (1)

Publication Number Publication Date
EP1808504A1 true EP1808504A1 (fr) 2007-07-18

Family

ID=36384290

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06000851A Withdrawn EP1808504A1 (fr) 2006-01-16 2006-01-16 Fonte de fer avec cobalt et son utilisation dans une turbine à vapeur
EP07703621.8A Not-in-force EP1974068B1 (fr) 2006-01-16 2007-01-03 Fonte contenant du cobalt et élément constitutif

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07703621.8A Not-in-force EP1974068B1 (fr) 2006-01-16 2007-01-03 Fonte contenant du cobalt et élément constitutif

Country Status (4)

Country Link
US (1) US20100178192A1 (fr)
EP (2) EP1808504A1 (fr)
CN (1) CN101400812A (fr)
WO (1) WO2007082788A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008051042A1 (de) * 2008-10-09 2010-04-15 Siemens Aktiengesellschaft Gusseisen mit Kobalt und Bauteil
EP2267174A3 (fr) * 2009-06-23 2012-05-02 General Electric Company Pièces moulées en fer ductile simo pour des applications dans les turbines à gaz
DE102011051446A1 (de) 2011-06-29 2013-01-03 Siempelkamp Giesserei Gmbh Gusseisen mit Kugelgraphit, insbesondere für Hochtemperaturanwendungen
CN105714181A (zh) * 2016-02-26 2016-06-29 铜陵安东铸钢有限责任公司 一种含钴球墨铸铁及其制备方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2511394B1 (fr) * 2011-04-15 2015-05-27 Siemens Aktiengesellschaft Fonte dotée de niobium et composant
CN103146990B (zh) * 2013-03-29 2016-07-06 天津新伟祥工业有限公司 汽车涡轮壳体用高硅钼铬球铁材质及其制备方法
US20190264304A1 (en) * 2016-11-18 2019-08-29 Michigan Technological University Ductile iron alloys and materials including a thin-wall layer of a ductile iron alloy

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740212A (en) * 1971-03-31 1973-06-19 Int Nickel Co Oxidation resistant austenitic ductile nickel chromium iron
JPS6141721A (ja) * 1984-07-31 1986-02-28 Kubota Ltd 延性に富んだ高強度ダクタイル鋳鉄管の製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681878B1 (fr) * 1991-09-26 1993-12-31 Centre Tech Ind Fonderie Fonte a graphite spherouidal resistant a la chaleur.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740212A (en) * 1971-03-31 1973-06-19 Int Nickel Co Oxidation resistant austenitic ductile nickel chromium iron
JPS6141721A (ja) * 1984-07-31 1986-02-28 Kubota Ltd 延性に富んだ高強度ダクタイル鋳鉄管の製造方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
KERN T-U ET AL: "MATERIAL DEVELOPMENT FOR HIGH TEMPERATURE-STRESSED COMPONENTS OF TURBOMACHINES", STAINLESS STEEL WORLD, XX, XX, October 1998 (1998-10-01), pages 19 - 27, XP009059714 *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 199 (C - 359) 11 July 1986 (1986-07-11) *
SHENG, S. (SIEMENS) ET AL: "High-strength cast and forged materials for application in steam turbine design .", PARSONS 2000: ADVANCED MATERIALS FOR 21ST CENTURY TURBINES AND POWER PLANT (JULY 2000), PP. 207-227, NUMERICAL DATA, GRAPHS, PHOTOMICROGRAPHS, 17 REF. PUBLISHED BY: INSTITUTE OF MATERIALS. 1 CARLTON HOUSE TERRACE, LONDON, SW1Y 5DB, UK CONFERENCE: PA, 2000, XP009067048 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008051042A1 (de) * 2008-10-09 2010-04-15 Siemens Aktiengesellschaft Gusseisen mit Kobalt und Bauteil
WO2010040606A1 (fr) * 2008-10-09 2010-04-15 Siemens Aktiengesellschaft Fonte sphéroïdale renfermant du cobalt
EP2267174A3 (fr) * 2009-06-23 2012-05-02 General Electric Company Pièces moulées en fer ductile simo pour des applications dans les turbines à gaz
DE102011051446A1 (de) 2011-06-29 2013-01-03 Siempelkamp Giesserei Gmbh Gusseisen mit Kugelgraphit, insbesondere für Hochtemperaturanwendungen
WO2013000836A1 (fr) 2011-06-29 2013-01-03 Siempelkamp Giesserei Gmbh Fonte à graphite sphéroïdal, en particulier pour applications à haute température
CN105714181A (zh) * 2016-02-26 2016-06-29 铜陵安东铸钢有限责任公司 一种含钴球墨铸铁及其制备方法

Also Published As

Publication number Publication date
EP1974068B1 (fr) 2013-07-24
CN101400812A (zh) 2009-04-01
WO2007082788A1 (fr) 2007-07-26
US20100178192A1 (en) 2010-07-15
EP1974068A1 (fr) 2008-10-01

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