EP1865080A1 - Verfahren zum Einbringen von Druckeigenspannungen in eine Welle, insbesondere in Wellenkerben - Google Patents

Verfahren zum Einbringen von Druckeigenspannungen in eine Welle, insbesondere in Wellenkerben Download PDF

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Publication number
EP1865080A1
EP1865080A1 EP06011627A EP06011627A EP1865080A1 EP 1865080 A1 EP1865080 A1 EP 1865080A1 EP 06011627 A EP06011627 A EP 06011627A EP 06011627 A EP06011627 A EP 06011627A EP 1865080 A1 EP1865080 A1 EP 1865080A1
Authority
EP
European Patent Office
Prior art keywords
shaft
quenching
diameter transitions
diameter
contour
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Withdrawn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
EP06011627A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michael Brändle
Thorsten-Ulf Kern
Christoph Richter
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 EP06011627A priority Critical patent/EP1865080A1/de
Priority to PCT/EP2007/051744 priority patent/WO2007141055A1/de
Priority to US12/227,926 priority patent/US20090145527A1/en
Priority to EP07712293A priority patent/EP2027299A1/de
Priority to CN2007800208277A priority patent/CN101460639B/zh
Priority to JP2009513613A priority patent/JP5377297B2/ja
Publication of EP1865080A1 publication Critical patent/EP1865080A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts

Definitions

  • the invention relates to a method for producing shafts, which are designed as stepped shafts with successive stages of different diameters, wherein diameter transitions or notch regions are arranged between respectively adjacent stages.
  • Such waves are known and are e.g. in turbomachines, for example, steam turbines, which have a low pressure part (ND) used, so that they can also be referred to as ND waves.
  • the shaft carries rotor blades which, together with associated guide vanes, form a blade grid through which a flow medium, for example steam, flows.
  • the shaft in the low-pressure part of the turbomachine, the shaft consists of a base material with cold-tough properties, for example 2-3.5 NiCrMoV steels are used to produce the ND shaft.
  • the flow medium acts in part as a corrosive medium on the components of the turbomachine, for example on discs in disc rotors or on shallow areas of the shaft, in particular the waves of low-pressure turbine parts. Due to the influence of these corrosive media, the fatigue strength of the base material can be significantly reduced. A reduction in the fatigue strength of the base material, for example, the waves in low-pressure turbine parts, but disadvantageously also causes a reduction in the life of the shaft.
  • the invention has for its object to improve a method for producing waves of the type mentioned by simple means to the extent that the resistance to component failure due to corrosion and vibration stress is significantly improved.
  • the object is achieved in that the diameter transitions or notch regions are quenched controlled in the context of a heat treatment or after a heating of the shaft.
  • the wave is protected, for example, by wet steam, especially in their wave notches before a fatigue reduction.
  • a protective layer according to the invention a method for the targeted increase of compressive residual stresses in diameter transitions or notch areas performed.
  • the diameter transitions or notch regions of the shaft after a last tempering treatment for example a Heat treatment tempered controlled at tempering temperature and / or below the tempering temperature.
  • a Heat treatment tempered controlled at tempering temperature and / or below the tempering temperature for example a Heat treatment tempered controlled at tempering temperature and / or below the tempering temperature.
  • the diameter transitions or notch regions for quenching are sprayed specifically with a cooling liquid or a quenching medium.
  • the shaft is transferred as a whole in a dip.
  • any suitable medium can be selected, preferably water, but also air-water mixtures, suitable polymers or oil or emulsions can be used as a cooling liquid or quenching medium.
  • the compensation contour is removed in the production of the final final contour after quenching.
  • the intended allowance still provides sufficiently high compressive residual stresses in the shaft surface, especially in the transition radii (diameter transitions or notch regions), with a defined depth effect.
  • the diameter transitions or notch regions have a radius with an amount R of 25 to 50 mm in their compensation contour.
  • the radii (diameter transitions or notch areas) of the compensation contour of the shaft are therefore designed specifically with a defined dimension as a function of the compressive residual stresses and depth distribution required in the finished contour.
  • Fig. 1 shows a section of a shaft 1, which differs as a stepped shaft with successive stages 2 Diameter D 1 to D4 based on a central axis X is executed, with four stages 2 are exemplified.
  • the illustrated, exemplary shaft 1 is part of a low-pressure part of a turbomachine, for example a low-pressure turbine part of a steam turbine.
  • the shaft 1 is made of, for example, a material having cold-tough properties, for example, 2-3.5 NiCrMoV steels are used to make the ND shaft.
  • the waves can also be made of other materials or material combinations.
  • diameter transitions 3 or kerf areas are arranged between each two adjacent stages 2 .
  • the diameter transitions 3 are curved relative to the central axis X slightly in the direction of the central axis X or convex with a radius R.
  • these and the notch regions are controlled quenched in a heat treatment or after heating the shaft.
  • the diameter transitions 3 or notch regions are preferably quenched in a controlled manner after a final tempering treatment at tempering temperature.
  • a subsequent, separate heating and quenching after tempering as a separate process step is of course also possible.
  • a cooling liquid or a quenching medium is sprayed onto the diameter transitions 3 for controlled quenching after the last tempering treatment at tempering temperature, which is represented by the fan-shaped spraying jets 4.
  • a cooling liquid or quenching medium for quenching any suitable medium can be selected, preferably Water, but also air-water mixtures, suitable polymers or oil or emulsions can be used.
  • the wave 1 can also be immersed as a whole.
  • the shaft 1 is designed with a heat treatment contour 6.
  • a finished contour dashed line 7, exaggerated for clarity
  • the allowance 8 of the shaft 1 in the heat treatment contour 6 for the tempering heat treatment is thus increased by a maximum of 10 to 40 mm, preferably in the respective shaft radius r or the respective diameter transition 3 with respect to the final end contour 7. This ensures that after quenching (spraying or dipping) a possible distortion of the shaft 1 can still be compensated.
  • the oversizes can be adapted, or mechanical processing can also take place if a separate heat treatment for the generation of (pressure) residual stresses takes place after the tempering treatment from tempering.
  • this maximum allowance 8 still maintains sufficient residual compressive stresses in the shaft surface and in particular in the transition radii or diameter transitions 3 with a defined depth effect.
  • the radii R have an amount of R approximately equal to 25 to 50 mm.
  • the respective transitions from the diameter transitions 3 to the respective stages 2 are shown in a sharply outlined manner in the exemplary embodiment and, of course, are processed accordingly at least to produce the final end contour.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
EP06011627A 2006-06-06 2006-06-06 Verfahren zum Einbringen von Druckeigenspannungen in eine Welle, insbesondere in Wellenkerben Withdrawn EP1865080A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP06011627A EP1865080A1 (de) 2006-06-06 2006-06-06 Verfahren zum Einbringen von Druckeigenspannungen in eine Welle, insbesondere in Wellenkerben
PCT/EP2007/051744 WO2007141055A1 (de) 2006-06-06 2007-02-23 Verfahren zum einbringen von druckeigenspannungen in eine welle, insbesondere in wellenkerben
US12/227,926 US20090145527A1 (en) 2006-06-06 2007-02-23 Method of introducing residual compressive stresses into a shaft
EP07712293A EP2027299A1 (de) 2006-06-06 2007-02-23 Verfahren zum einbringen von druckeigenspannungen in eine welle, insbesondere in wellenkerben
CN2007800208277A CN101460639B (zh) 2006-06-06 2007-02-23 用于将压力内应力加入到轴尤其轴沟槽中的方法
JP2009513613A JP5377297B2 (ja) 2006-06-06 2007-02-23 シャフト段付部に圧縮残留応力を導入する方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06011627A EP1865080A1 (de) 2006-06-06 2006-06-06 Verfahren zum Einbringen von Druckeigenspannungen in eine Welle, insbesondere in Wellenkerben

Publications (1)

Publication Number Publication Date
EP1865080A1 true EP1865080A1 (de) 2007-12-12

Family

ID=36950407

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06011627A Withdrawn EP1865080A1 (de) 2006-06-06 2006-06-06 Verfahren zum Einbringen von Druckeigenspannungen in eine Welle, insbesondere in Wellenkerben
EP07712293A Withdrawn EP2027299A1 (de) 2006-06-06 2007-02-23 Verfahren zum einbringen von druckeigenspannungen in eine welle, insbesondere in wellenkerben

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07712293A Withdrawn EP2027299A1 (de) 2006-06-06 2007-02-23 Verfahren zum einbringen von druckeigenspannungen in eine welle, insbesondere in wellenkerben

Country Status (5)

Country Link
US (1) US20090145527A1 (sv)
EP (2) EP1865080A1 (sv)
JP (1) JP5377297B2 (sv)
CN (1) CN101460639B (sv)
WO (1) WO2007141055A1 (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107955874B (zh) * 2017-11-22 2020-09-04 株洲市九洲传动机械设备有限公司 一种设有表面局部淬火过渡区的轴类零件及其机加工工艺

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2209945A1 (de) * 1972-03-02 1973-09-13 Maschf Augsburg Nuernberg Ag Verfahren zur herstellung einer kurbelwelle und danach hergestellte kurbelwelle
DE2226530A1 (de) * 1972-05-31 1973-12-06 Aeg Elotherm Gmbh Verfahren zur induktionshaertung an gekroepften wellen
JPS55128537A (en) * 1979-03-28 1980-10-04 Japanese National Railways<Jnr> Heat treatment for enhancing fatigue strength and bending strength of shaft and knotched machine parts
JPS5964716A (ja) * 1982-10-02 1984-04-12 High Frequency Heattreat Co Ltd 焼入装置
EP0282822A1 (de) * 1987-03-16 1988-09-21 Siemens Aktiengesellschaft Verfahren zur Herstellung von Turbinenradscheiben mit örtlich hohen Druckeigenspannungen in der Nabenbohrung
JPH05148531A (ja) * 1991-11-25 1993-06-15 Toyota Motor Corp フランジ付ワーク用高周波焼入装置
JPH08120347A (ja) * 1994-10-24 1996-05-14 Matsui Seisakusho:Kk 駆動軸の製造方法
JP2002173711A (ja) * 2000-12-06 2002-06-21 Denki Kogyo Co Ltd クランクシャフトの高周波焼入冷却方法とその装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207716B (de) * 1962-04-19 1965-12-23 Deutsche Edelstahlwerke Ag Kurbelwelle und Verfahren zu ihrer Haertung
JPS59116321A (ja) * 1982-12-22 1984-07-05 Nippon Steel Corp レ−ルあご下の耐破壊性改善の熱処理方法
US4497612A (en) * 1983-11-25 1985-02-05 General Electric Company Steam turbine wheel antirotation means
JPH02136052U (sv) * 1989-04-17 1990-11-13
JPH09296258A (ja) * 1996-05-07 1997-11-18 Hitachi Ltd 耐熱鋼及び蒸気タービン用ロータシャフト
DE69738069T2 (de) * 1996-07-02 2008-05-21 Cummins, Inc., Columbus Induktionsgehärteter mikrolegierter stahl mit verbesserten ermüdungsbeständigkeitseigenschaften
JP2000087135A (ja) * 1998-09-09 2000-03-28 High Frequency Heattreat Co Ltd 足付軸部材の誘導加熱焼入装置
UA56189C2 (uk) * 1999-04-20 2003-05-15 Микола Іванович Кобаско Спосіб гартування сталей

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2209945A1 (de) * 1972-03-02 1973-09-13 Maschf Augsburg Nuernberg Ag Verfahren zur herstellung einer kurbelwelle und danach hergestellte kurbelwelle
DE2226530A1 (de) * 1972-05-31 1973-12-06 Aeg Elotherm Gmbh Verfahren zur induktionshaertung an gekroepften wellen
JPS55128537A (en) * 1979-03-28 1980-10-04 Japanese National Railways<Jnr> Heat treatment for enhancing fatigue strength and bending strength of shaft and knotched machine parts
JPS5964716A (ja) * 1982-10-02 1984-04-12 High Frequency Heattreat Co Ltd 焼入装置
EP0282822A1 (de) * 1987-03-16 1988-09-21 Siemens Aktiengesellschaft Verfahren zur Herstellung von Turbinenradscheiben mit örtlich hohen Druckeigenspannungen in der Nabenbohrung
JPH05148531A (ja) * 1991-11-25 1993-06-15 Toyota Motor Corp フランジ付ワーク用高周波焼入装置
JPH08120347A (ja) * 1994-10-24 1996-05-14 Matsui Seisakusho:Kk 駆動軸の製造方法
JP2002173711A (ja) * 2000-12-06 2002-06-21 Denki Kogyo Co Ltd クランクシャフトの高周波焼入冷却方法とその装置

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 190 (C - 037) 26 December 1980 (1980-12-26) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 162 (C - 235) 26 July 1984 (1984-07-26) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 540 (C - 1115) 29 September 1993 (1993-09-29) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 10 10 October 2002 (2002-10-10) *

Also Published As

Publication number Publication date
CN101460639A (zh) 2009-06-17
US20090145527A1 (en) 2009-06-11
WO2007141055A1 (de) 2007-12-13
JP2009540114A (ja) 2009-11-19
EP2027299A1 (de) 2009-02-25
CN101460639B (zh) 2012-10-10
JP5377297B2 (ja) 2013-12-25

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