EP0562920A1 - Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser - Google Patents

Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser Download PDF

Info

Publication number
EP0562920A1
EP0562920A1 EP93400697A EP93400697A EP0562920A1 EP 0562920 A1 EP0562920 A1 EP 0562920A1 EP 93400697 A EP93400697 A EP 93400697A EP 93400697 A EP93400697 A EP 93400697A EP 0562920 A1 EP0562920 A1 EP 0562920A1
Authority
EP
European Patent Office
Prior art keywords
notch
angle
laser beam
normal
powder
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.)
Granted
Application number
EP93400697A
Other languages
English (en)
French (fr)
Other versions
EP0562920B1 (de
Inventor
Emmanuel Kerrand
Frederic Cariou
Didier Boucachard
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.)
European Gas Turbines SA
Original Assignee
European Gas Turbines SA
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 European Gas Turbines SA filed Critical European Gas Turbines SA
Publication of EP0562920A1 publication Critical patent/EP0562920A1/de
Application granted granted Critical
Publication of EP0562920B1 publication Critical patent/EP0562920B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate

Definitions

  • the present invention relates to a method of coating an inverted Z-shaped notch of nickel alloy parts having a flat wall preceded by a rounded one. These parts are in particular fins of gas turbine made of nickel alloy which are difficult to weld.
  • the method according to the invention making it possible to obtain a non-cracking anti-wear metallic coating having a good metallic bond with the substrate in the contact areas of complex shapes is characterized in that a laser beam is orientable and relatively displaceable by relative to the plane wall of the notch and making a fixed angle ⁇ 2 with respect to a powder beam, the laser beam making an angle ⁇ with respect to the normal N to the plane wall of the notch and, the direction of the beam powder an angle ⁇ + ⁇ 2 with said normal N, in that during the preparation of the various layers, several longitudinal passes are made at constant speed starting from the bottom of the notch towards the edge, the meeting point 0 between the laser beam and the direction of projection of the powder remaining stationary for a few tenths of a second on the rounding of the notch at the start of each longitudinal pass and in that during the preparation of the first layer the aryl ⁇ remains constant and equal to an angle ⁇ 1 less than 30 ° while during the preparation of the following layers the angle ⁇ at the start of each first takes a
  • the contact point 0 at the start of the passes is positioned in the rounding inside the material.
  • Figure 1 shows the part provided with its coating before and after machining.
  • FIG. 2 represents the deposition of the first layer on the rounding of the notch.
  • FIG. 3 represents the deposition of the first layer on the flat face of the notch.
  • FIG. 4 represents the first phase of the deposition of a subsequent layer on the rounding of the notch.
  • FIG. 5 represents the second phase of the deposit of FIG. 4.
  • Figure 6 shows the deposition of the layer of Figures 4 and 5 on the flat face of the notch.
  • FIG. 7 represents the section of FIG. 1.
  • the raw profile 1 of the nickel alloy blade is shown in dotted lines in FIG. 1.
  • This profile is in the form of an "inverted Z" and comprises in the intermediate part of the "inverted Z" a notch 2 consisting of a part rounded 3 followed by a flat part 4 corresponding to the intermediate part of the "inverted Z".
  • the notch 2 is coated with several layers 5, 5 ′, planes parallel to the planar part 4 using a CO2 laser in the beam of which a metallic powder is sprayed.
  • Each layer 5 is made up of several adjacent beads 6 deposited during successive passes (see FIG. 7).
  • the deposit consists of a non-cracking anti-wear metallic coating having a good metallic bond with the Nickel alloy substrate.
  • the laser beam 8 is orientable and movable relative to the planar wall 4 of the notch 2.
  • the direction of the laser beam and the direction 9 of projection of the powder form a constant angle ⁇ 2 (see FIG. 2).
  • the laser beam 8 is inclined relative to the normal N to the plane wall 4 of the notch 2 at an angle ⁇ of a few tens of degrees. This angle depends on the blade profile.
  • the beam 8 makes an angle ⁇ with the normal N and the direction 9 of projection of the powder an angle ⁇ + ⁇ 2.
  • the angle of inclination of the laser beam 8 is fixed at ⁇ 1 and it will not be modified during the entire production of the first layer 5; in the specific example ⁇ 1 has been taken equal to 25 ° and is substantially parallel to the first branch 10 of the "inverted Z".
  • the intersection point 0 is positioned between the laser beam 8 and the powder beam 9 inside the material (a few tenths of a mm), which allows on the one hand to make up for the difference in altitude with the flat part 4 of the area to be coated and thus avoid any subsequent modification of its positioning when carrying out the pass in progress and on the other hand to maintain the powder beam 9 downstream from the laser beam / part contact point in order to ensure better fusion of the powder and to minimize the projection of particles towards the bottom of the notch 2 (FIG. 2).
  • the point of intersection 0 is also maintained for a few tenths of a second inside the material without displacement in order to increase the laser / material interaction time and ensure a substrate melting.
  • the laser beam 8 / powder beam 9 assembly (angle ⁇ 2 contant) is then moved at constant speed to the edge 11 of the "inverted Z", the beam / powder intersection point being on the surface of the substrate (figure 3).
  • the operation is repeated until the first layer 5 is deposited.
  • the angle ⁇ 3 is therefore variable from layer to layer.
  • the point of intersection 0 beam / powder is inside the rounding material.
  • a rotation of the laser beam, powder 8, 9 assembly is then carried out at this point in a few tenths of a second ( ⁇ 1 s) in order to increase the interaction time and to replace the laser beam 8 in position to build the new pass.
  • the laser beam 8 then makes the angle ⁇ 1 with the normal N and it is displaced as during the deposition of the first layer 5 with ⁇ 1 and ⁇ 2 constant from the bottom 3 of the notch 2 towards the edge 11 while remaining on the surface of the layer previously deposited (see Figure 6).
  • the coating deposited has the appearance shown in FIG. 7 with the various layers 5, 5 ′ made up of beads 12 produced during each pass.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laser Beam Processing (AREA)
EP93400697A 1992-03-23 1993-03-18 Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser Expired - Lifetime EP0562920B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203459 1992-03-23
FR9203459A FR2688803B1 (fr) 1992-03-23 1992-03-23 Procede de revetement d'une encoche d'une piece en alliage de nickel par laser.

Publications (2)

Publication Number Publication Date
EP0562920A1 true EP0562920A1 (de) 1993-09-29
EP0562920B1 EP0562920B1 (de) 1995-09-20

Family

ID=9427960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400697A Expired - Lifetime EP0562920B1 (de) 1992-03-23 1993-03-18 Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser

Country Status (4)

Country Link
US (1) US5372861A (de)
EP (1) EP0562920B1 (de)
DE (1) DE69300501T2 (de)
FR (1) FR2688803B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998015672A1 (de) * 1995-10-05 1998-04-16 Blz Bayerisches Laserzentrum Gemeinnützige Forsch Ungsgesellschaft Mbh Verfahren und vorrichtung zur herstellung eines schneidwerkzeuges
WO2006094935A1 (en) * 2005-03-05 2006-09-14 Alstom Technology Ltd Turbine blades and methods for depositing an erosion resistant coating on the same
EP2292371A1 (de) * 2009-09-04 2011-03-09 Rolls-Royce plc Verfahren zum Auftragen von Material

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2707677B1 (fr) * 1993-07-13 1995-08-25 Technogenia Plaque de défibrage ou de raffinage de pâte à papier, et procédé pour sa réalisation.
SE9303245L (sv) * 1993-10-05 1995-04-06 Johan Lennart Olofsson Förfarande för att förbättra bestämda egenskaper på järnvägshjul
US5889254A (en) * 1995-11-22 1999-03-30 General Electric Company Method and apparatus for Nd: YAG hardsurfacing
JP4346684B2 (ja) * 1996-04-17 2009-10-21 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 基板上への焼結体の製造方法
JP3591147B2 (ja) * 1996-07-19 2004-11-17 日産自動車株式会社 レーザービームによる肉盛方法
CA2207579A1 (fr) 1997-05-28 1998-11-28 Paul Caron Piece frittee a surface anti-abrasive et procede pour sa realisation
US6203861B1 (en) * 1998-01-12 2001-03-20 University Of Central Florida One-step rapid manufacturing of metal and composite parts
US20040086635A1 (en) * 2002-10-30 2004-05-06 Grossklaus Warren Davis Method of repairing a stationary shroud of a gas turbine engine using laser cladding
US7458765B2 (en) * 2005-09-23 2008-12-02 Fraunhofer Usa Diamond hard coating of ferrous substrates
EP2240293A1 (de) * 2008-02-13 2010-10-20 Siemens Aktiengesellschaft Verfahren zum aufschmelzen von gekrümmten oberflächen und eine vorrichtung
FR3001758B1 (fr) * 2013-02-01 2016-07-15 Snecma Aube de rotor de turbomachine
US9359897B2 (en) * 2014-08-15 2016-06-07 Siemens Energy, Inc. Method for building a gas turbine engine component
US9358643B2 (en) * 2014-08-15 2016-06-07 Siemens Energy, Inc. Method for building a gas turbine engine component
DE102017011842A1 (de) 2017-12-15 2019-06-19 ELOXALWERK Ludwigsburg Helmut Zerrer GmbH Beschichtungsdispersion; Herstellungsverfahren einer Beschichtungsdispersion
EP3498383A3 (de) 2017-12-15 2019-09-25 Eloxalwerk Ludwigsburg Helmut Zerrer GmbH Vorrichtung zum beschichten eines werkstücks mit mindestens einem hochleistungspolymer; beschichtungsverfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574984A (en) * 1978-05-15 1980-09-17 Atomic Energy Authority Uk Laser powder metallurgy
US4299860A (en) * 1980-09-08 1981-11-10 The United States Of America As Represented By The Secretary Of The Navy Surface hardening by particle injection into laser melted surface
DE3509582C1 (de) * 1985-03-16 1986-02-20 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Metallrad, insbesondere Eisenbahnrad
US4832982A (en) * 1986-12-08 1989-05-23 Toyota Jidosha Kabushiki Kaisha Laser process for forming dispersion alloy layer from powder on metallic base
FR2642690A1 (fr) * 1989-02-08 1990-08-10 Gen Electric Procede de fabrication de composants par depot de couches et composant obtenu

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291448A (en) * 1977-12-12 1981-09-29 Turbine Components Corporation Method of restoring the shrouds of turbine blades
IT1172891B (it) * 1978-07-04 1987-06-18 Fiat Spa Procedimento per rivestire con materiale antiusura una superficie metallica
US4275124A (en) * 1978-10-10 1981-06-23 United Technologies Corporation Carbon bearing MCrAlY coating
GB2052566B (en) * 1979-03-30 1982-12-15 Rolls Royce Laser aplication of hard surface alloy
IT1179061B (it) * 1984-08-20 1987-09-16 Fiat Auto Spa Procedimento per l'effettuazione di un trattamento su pezzi metallici con l'aggiunta di un materiale d'apporto e con l'impiego di un laser di potenza
US4743733A (en) * 1984-10-01 1988-05-10 General Electric Company Method and apparatus for repairing metal in an article
US4710102A (en) * 1984-11-05 1987-12-01 Ortolano Ralph J Connected turbine shrouding
FR2612106B1 (fr) * 1987-03-09 1989-05-19 Alsthom Procede de pose d'un revetement protecteur sur une aube en alliage de titane et aube ainsi revetue
EP0435818B1 (de) * 1989-12-27 1994-06-15 Sulzer Innotec Ag Vorrichtung zum Schweissen und/oder Beschichten von Werkstücken, Düse für eine derartige Vorrichtung sowie Manipulator für die Düse einer derartigen Vorrichtung
DE4015206C1 (de) * 1990-05-11 1991-10-17 Mtu Muenchen Gmbh
US5120197A (en) * 1990-07-16 1992-06-09 General Electric Company Tip-shrouded blades and method of manufacture
US5083903A (en) * 1990-07-31 1992-01-28 General Electric Company Shroud insert for turbomachinery blade

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574984A (en) * 1978-05-15 1980-09-17 Atomic Energy Authority Uk Laser powder metallurgy
US4299860A (en) * 1980-09-08 1981-11-10 The United States Of America As Represented By The Secretary Of The Navy Surface hardening by particle injection into laser melted surface
DE3509582C1 (de) * 1985-03-16 1986-02-20 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Metallrad, insbesondere Eisenbahnrad
US4832982A (en) * 1986-12-08 1989-05-23 Toyota Jidosha Kabushiki Kaisha Laser process for forming dispersion alloy layer from powder on metallic base
FR2642690A1 (fr) * 1989-02-08 1990-08-10 Gen Electric Procede de fabrication de composants par depot de couches et composant obtenu

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998015672A1 (de) * 1995-10-05 1998-04-16 Blz Bayerisches Laserzentrum Gemeinnützige Forsch Ungsgesellschaft Mbh Verfahren und vorrichtung zur herstellung eines schneidwerkzeuges
US6316065B1 (en) 1995-10-05 2001-11-13 Ble Bayerisches Laserzentrum Gemeinnutzige Forschungsgesellschaft Mbh Process and device for manufacturing a cutting tool
WO2006094935A1 (en) * 2005-03-05 2006-09-14 Alstom Technology Ltd Turbine blades and methods for depositing an erosion resistant coating on the same
EP2292371A1 (de) * 2009-09-04 2011-03-09 Rolls-Royce plc Verfahren zum Auftragen von Material
US8673203B2 (en) 2009-09-04 2014-03-18 Rolls-Royce Plc Method of depositing material

Also Published As

Publication number Publication date
DE69300501D1 (de) 1995-10-26
DE69300501T2 (de) 1996-02-22
FR2688803A1 (fr) 1993-09-24
FR2688803B1 (fr) 1994-05-06
US5372861A (en) 1994-12-13
EP0562920B1 (de) 1995-09-20

Similar Documents

Publication Publication Date Title
EP0562920B1 (de) Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser
EP1785650B1 (de) Herstellungsverfahren einer Labyrinthschneidendichtung, thermomechanisches Teil und Turbomaschine mit einer solchen Dichtung
EP0626231B1 (de) Laserschweissverfahren um zwei metallischen Werkstücken
EP1630262A1 (de) Verfahren zum Wiederaufbauen eines Bauteiles aus einkristallinem oder gerichtet erstarrtem Metall
EP1215008B1 (de) Verfahren und Einrichtung zum Laserschneiden mit einem zweiflüssigen Doppelfokusschneidkopf
CH640448A5 (fr) Procede d'ebavurage d'une piece mecanique et dispositif de mise en oeuvre du procede.
FR2931714A1 (fr) Construction d'une partie d'une piece metallique par le procede mig avec courant et fil pulses
FR2893268A1 (fr) Procede de realisation d'un rebord situe a l'extremite libre d'une aube, aube obtenue par ce procede et turbomachine equipee de cette aube
FR2978070A1 (fr) Procede de reparation d'une piece de turbomachine
FR2893358A1 (fr) Piece thermomecanique de turbomachine de revolution autour d'un axe longitudinal, comprenant une lechette annulaire, et son procede de fabrication
FR2807683A3 (fr) Procede pour la coupe au laiser et/ou plasma d'une bande, en particulier de metal en bobines et ligne de coupe continue correspondante
EP1350861A1 (de) Verfahren zur Herstellung und Regeneration von Sputtertargets
WO1997022432A1 (fr) Procede de raccordement par soudage heterogene de deux pieces et utilisation
EP3402626B1 (de) Verfahren und anlage zur herstellung eines dreidimensionalen objektes
FR3029813A1 (fr) Procede de fabrication d'un revetement microstructure, et paroi presentant un tel revetement
EP3898072A1 (de) Verfahren zur herstellung eines rohlings und entsprechende vorrichtung
CA2449005C (fr) Procede de fabrication de profiles metalliques
CA1308786C (fr) Procede de soudage a l'arc en chanfrein etroit et dispositif pour sa mise en oeuvre
EP3969213A1 (de) Verfahren zur generativen fertigung eines metallteils
EP0954619B1 (de) Verfahren und einrichtung zur herstellung einer beschichtung auf einem substrat
EP0599737B1 (de) Verfahren zum Auftragschweissen an einem Werkstück mittels Plasma mit übertragenem Lichtbogen
EP3481570A2 (de) Verfahren zur generativen fertigung mit materialentfernung zwischen zwei schichten
WO2006111660A2 (fr) Procede de soudage de canalisations metalliques du type pipeline avec variation d ' une variable electrique relative a l ' arc au cours du mouvement oscillant transverse de la torche dans le joint etroit ; dispositif de mise en oeuvre d ' un tel procede
WO2023037083A1 (fr) Procédé de dépôt de fil métallique fondu à l'aide d'un faisceau laser balayé sur la surface de la pièce.
FR2823458A1 (fr) Dispositif ameliore et procede de soudage laser dit bi-passes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19940204

17Q First examination report despatched

Effective date: 19950217

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 69300501

Country of ref document: DE

Date of ref document: 19951026

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19951123

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20120406

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120327

Year of fee payment: 20

Ref country code: GB

Payment date: 20120326

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20120329

Year of fee payment: 20

Ref country code: DE

Payment date: 20120328

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69300501

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: V4

Effective date: 20130318

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20130317

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130317

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130319