EP0652300A1 - Nitruration superficielle pour la production d'une couche austénitique à résistance élevée dans les aciers inoxydables - Google Patents
Nitruration superficielle pour la production d'une couche austénitique à résistance élevée dans les aciers inoxydables Download PDFInfo
- Publication number
- EP0652300A1 EP0652300A1 EP94114659A EP94114659A EP0652300A1 EP 0652300 A1 EP0652300 A1 EP 0652300A1 EP 94114659 A EP94114659 A EP 94114659A EP 94114659 A EP94114659 A EP 94114659A EP 0652300 A1 EP0652300 A1 EP 0652300A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat treatment
- stainless
- treatment method
- surface layer
- steel
- 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
Links
Images
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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
Definitions
- the present invention dispenses with a consistently high nitrogen content in the steel. Instead, only the edge zone of near-net shape parts made of stainless steel are enriched with dissolved nitrogen by heat treatment to such an extent that a high-strength but tough austenitic surface layer forms over a core structure made of ferrite, austenite, martensite or a mixture of two or three of these structural components.
- the heat treatment according to the invention consists of nitriding in a nitrogen-emitting gas atmosphere at a temperature between 1000 and 1200 ° C.
- the temperature, pressure and duration of the treatment are chosen so that an edge layer of a certain thickness is formed, the nitrogen content of which in the surface is between a lower limit of 0.3% by weight and an upper limit which is given by the beginning nitride precipitation during the nitriding.
- the subsequent cooling takes place so quickly that nitride excretion does not occur in this period either.
- Subsequent aging at a temperature of ⁇ 650 ° C enables the surface layer to harden.
- Patent DE 40 33 706 describes case hardening with nitrogen, in which after a martensitic, rustproof steel is embroidered, a hard martensitic surface layer is produced over a ductile core by hardening. This process is used for the treatment of rustproof rolling bearings, gear parts and tools as well as for rustproof pump parts and valves in particle-laden fluids. In all these cases, the highest compressive strength and hardness of the surface layer are important, but this is associated with considerable embrittlement.
- the aim of the present invention is to create a high-strength but tough austenitic surface layer over a ductile or hard core (Fig. 1).
- the austenitic surface layer according to the invention is suitable for increasing the wear resistance, in particular when subjected to impact wear, cavitation and droplet impact, such as those e.g. occurs in turbomachines.
- ferritic-austenitic duplex stainless steels are often used, the two-phase structure of which has the required high plug-in limit.
- a common type of failure is wear due to cavitation.
- a content of ⁇ 1.4% by weight of nitrogen is dissolved in the edge zone of this material by embroidering in nitrogen gas at 1150 ° C. and a pressure of 1 bar.
- FIG. 3 This surface layer was subjected to a cavitation wear test in comparison to the core material not embroidered on.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4333917A DE4333917C2 (de) | 1993-10-05 | 1993-10-05 | Randaufsticken zur Erzeugung einer hochfesten austenitischen Randschicht in nichtrostenden Stählen |
DE4333917 | 1993-10-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0652300A1 true EP0652300A1 (fr) | 1995-05-10 |
EP0652300B1 EP0652300B1 (fr) | 2007-11-28 |
Family
ID=6499447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94114659A Expired - Lifetime EP0652300B1 (fr) | 1993-10-05 | 1994-09-17 | Nitruration superficielle pour la production d'une couche austénitique à résistance élevée dans les aciers inoxydables |
Country Status (9)
Country | Link |
---|---|
US (1) | US5503687A (fr) |
EP (1) | EP0652300B1 (fr) |
JP (1) | JPH07188733A (fr) |
CN (1) | CN1058758C (fr) |
CZ (1) | CZ240094A3 (fr) |
DE (1) | DE4333917C2 (fr) |
ES (1) | ES2296286T3 (fr) |
PL (1) | PL178509B1 (fr) |
RU (1) | RU2127330C1 (fr) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0890656A1 (fr) * | 1997-07-12 | 1999-01-13 | Ipsen International GmbH | Procédé de nitruration de surfaces de pièces métalliques |
WO1999005340A1 (fr) * | 1997-07-21 | 1999-02-04 | Nsk-Rhp European Technology Co. Limited | Cementation d'aciers |
EP1956099A1 (fr) | 2007-02-02 | 2008-08-13 | WMF Aktiengesellschaft | Couvert de service en acier ferritique inoxydable avec couche de surface martensitique |
DE202008015481U1 (de) | 2008-10-08 | 2009-06-18 | Barth, Peter, Dr. | Schmucksachen aus Edelstahl mit einer martensitischen Randschicht |
WO2010040333A1 (fr) * | 2008-10-08 | 2010-04-15 | Peter Barth | Matériau en acier spécial biocompatible avec une couche de bord martensitique |
DE102009005578A1 (de) | 2009-01-21 | 2010-07-22 | Barth, Peter, Dr. | Medizinische Instrumente aus Edelstahl mit einer martensitischen Randschicht |
DE102011077368A1 (de) | 2011-06-10 | 2012-12-13 | BSH Bosch und Siemens Hausgeräte GmbH | Haushaltsgerät mit einem wärmebehandelten Haushaltsgeräte-Bauteil |
DE102012216117A1 (de) | 2012-09-12 | 2014-03-13 | Hilti Aktiengesellschaft | Verfahren zum Herstellen einer selbstschneidenden Schraube |
WO2015173380A1 (fr) | 2014-05-15 | 2015-11-19 | Expanite Technology A/S | Rondelle de blocage |
WO2017194359A1 (fr) * | 2016-05-12 | 2017-11-16 | Fischerwerke Gmbh & Co. Kg | Vis à béton autotaraudeuse |
EP3614028A1 (fr) | 2013-12-10 | 2020-02-26 | Parker-Hannifin Corporation | Férule à couches de dureté multiples et procédé |
CN111663097A (zh) * | 2020-06-17 | 2020-09-15 | 惠州濠特金属科技有限公司 | 奥氏体渗氮的工艺 |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1036945A (ja) * | 1996-07-19 | 1998-02-10 | Nippon Steel Corp | ねじ込み性に優れた高耐銹性マルテンサイト系ステンレス製ドリリングタッピンねじ及びその焼入方法 |
US5851313A (en) * | 1996-09-18 | 1998-12-22 | The Timken Company | Case-hardened stainless steel bearing component and process and manufacturing the same |
JP4252145B2 (ja) * | 1999-02-18 | 2009-04-08 | 新日鐵住金ステンレス株式会社 | 耐遅れ破壊性に優れた高強度・高靭性ステンレス鋼 |
US7754028B2 (en) * | 2002-07-29 | 2010-07-13 | Koninklijke Philips Electronics N.V. | Plasma-nitriding of maraging steel, shaver cap for an electric shaver, cutting device made out of such steel and an electric shaver |
JP4009716B2 (ja) * | 2002-08-08 | 2007-11-21 | 独立行政法人物質・材料研究機構 | 窒素吸収処理によるステンレス鋼製製品の製造方法とこれにより得られるステンレス鋼製製品 |
JP4336784B2 (ja) * | 2002-11-21 | 2009-09-30 | 独立行政法人物質・材料研究機構 | 生体軟組織用医療用具とその製造方法 |
DE102004048172A1 (de) * | 2004-10-02 | 2006-04-06 | Ina-Schaeffler Kg | Spanlos hergestelltes dünnwandiges rostfreies Lagerbauteil insbesondere Wälzlagerbauteil |
JP4378773B2 (ja) | 2005-05-16 | 2009-12-09 | 独立行政法人物質・材料研究機構 | ステンレス鋼製製品の製造方法とそのステンレス鋼製製品 |
CN101198714B (zh) * | 2005-06-15 | 2011-07-20 | 皇家飞利浦电子股份有限公司 | 制造不锈钢产品的方法 |
JP2007248397A (ja) * | 2006-03-17 | 2007-09-27 | Seiko Epson Corp | 装飾品および時計 |
US7793416B2 (en) | 2006-05-15 | 2010-09-14 | Viking Pump, Inc. | Methods for hardening pump casings |
CN101186992B (zh) * | 2006-11-16 | 2010-11-17 | 有限会社结城高周波 | 渗氮淬火制品及其制造方法 |
JP5212602B2 (ja) * | 2007-09-14 | 2013-06-19 | セイコーエプソン株式会社 | 機器およびハウジング材の製造方法 |
FI125458B (fi) * | 2008-05-16 | 2015-10-15 | Outokumpu Oy | Ruostumaton terästuote, tuotteen käyttö ja menetelmä sen valmistamiseksi |
JP2009142664A (ja) * | 2009-02-04 | 2009-07-02 | National Institute For Materials Science | 生体軟組織用医療用具とその製造方法 |
DE102009053260B4 (de) * | 2009-11-05 | 2011-09-01 | Salzgitter Flachstahl Gmbh | Verfahren zum Beschichten von Stahlbändern und beschichtetes Stahlband |
WO2013159781A1 (fr) * | 2012-04-27 | 2013-10-31 | Expanite A/S | Procédé pour le durcissement en solution d'une pièce déformée à froid constituée d'un alliage passif et élément durci en solution par le procédé |
MY165022A (en) * | 2011-04-28 | 2018-02-28 | Expanite As | Method for solution hardening of a cold deformed workpiece of a passive alloy, and a member solution hardened by the method |
FR2980804B1 (fr) | 2011-09-30 | 2014-06-27 | Areva Np | Procede de realisation a partir d'une ebauche en acier inoxydable austenitique a faible teneur en carbone d'une gaine resistant a l'usure et a la corrosion pour reacteur nucleaire, gaine et grappe de commande correspondantes |
US9309895B2 (en) | 2012-06-18 | 2016-04-12 | Kennametal Inc. | Closed impeller with a coated vane |
RU2522922C2 (ru) * | 2012-10-10 | 2014-07-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" | Способ внутреннего азотирования ферритной коррозионно-стойкой стали |
DE102012023394A1 (de) | 2012-11-30 | 2014-06-05 | Robert Bosch Gmbh | Eisenbasierte Legierung, daraus hergestelltes Halbzeug oder Bauteil mit magnetischem Trennbereich, und Verfahren zu deren Herstellung |
JP5869072B2 (ja) * | 2014-08-06 | 2016-02-24 | 日本冶金工業株式会社 | ステンレス鋼板の表面改質方法 |
WO2018196931A1 (fr) | 2017-04-26 | 2018-11-01 | Expanite Technology A/S | Composant d'assemblage |
CN109811299A (zh) * | 2018-12-27 | 2019-05-28 | 陕西铁马铸锻有限公司 | 转辙机锁闭杆及其热处理工艺 |
CN110283979A (zh) * | 2019-06-05 | 2019-09-27 | 无锡光旭新材料科技有限公司 | 一种同时提高铁素体不锈钢强度和塑性的方法 |
CN110438511A (zh) * | 2019-09-19 | 2019-11-12 | 奥展实业有限公司 | 一种不锈钢紧固件的防锈方法 |
DE102019125839A1 (de) * | 2019-09-25 | 2021-04-08 | Danfoss A/S | Verfahren zum Herstellen einer wasserhydraulischen Maschine |
CN111962014B (zh) * | 2020-09-04 | 2023-04-28 | 湖南申亿五金标准件有限公司 | 一种不锈钢强化热处理工艺及热处理渗氮炉 |
RU2758506C1 (ru) * | 2020-12-01 | 2021-10-29 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") | Способ повышения износостойкости и коррозионной стойкости изделий из аустенитных сталей |
CN112831639B (zh) * | 2020-12-31 | 2022-11-11 | 武汉科技大学 | 一种屈服强度≥700MPa奥氏体不锈钢的生产方法 |
CN115466922A (zh) * | 2022-09-13 | 2022-12-13 | 长春工业大学 | 一种高强高韧高耐腐蚀不锈钢材料及其制备方法和应用 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2518452A1 (de) * | 1974-06-12 | 1976-01-02 | Allegheny Ludlum Ind Inc | Verfahren zum herstellen austenitischer eisenhaltiger legierungen |
US4154629A (en) * | 1975-12-23 | 1979-05-15 | Kabushiki-Kaisha Fujikoshi | Process of case hardening martensitic stainless steels |
DE4033706C2 (fr) * | 1990-10-24 | 1991-07-11 | Hans Prof. Dr.-Ing. 4630 Bochum De Berns | |
DE4036381C1 (fr) * | 1990-11-15 | 1991-08-14 | Degussa Ag, 6000 Frankfurt, De |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU584044A1 (ru) * | 1975-12-01 | 1977-12-15 | Предприятие П/Я А-1147 | Способ термической обработки деталей из нержавеющих мартенситностареющих сталей |
JPS60159116A (ja) * | 1984-01-27 | 1985-08-20 | Toyota Motor Corp | 焼入性と強靭性の良好な鋼部品の製造方法 |
DE3708956C1 (de) * | 1987-03-19 | 1988-03-17 | Handtmann Albert Elteka Gmbh | Spaltringdichtung einer Kreiselpumpe |
JPH05222512A (ja) * | 1991-09-05 | 1993-08-31 | Aimetsukusu Kk | オーステナイト系ステンレス鋼における耐摩耗性を向上させた高温窒化処理方法とその応用 |
-
1993
- 1993-10-05 DE DE4333917A patent/DE4333917C2/de not_active Expired - Lifetime
-
1994
- 1994-09-17 EP EP94114659A patent/EP0652300B1/fr not_active Expired - Lifetime
- 1994-09-17 ES ES94114659T patent/ES2296286T3/es not_active Expired - Lifetime
- 1994-09-30 CZ CZ942400A patent/CZ240094A3/cs unknown
- 1994-10-03 PL PL94305287A patent/PL178509B1/pl not_active IP Right Cessation
- 1994-10-03 RU RU94035767A patent/RU2127330C1/ru not_active IP Right Cessation
- 1994-10-04 JP JP6275455A patent/JPH07188733A/ja active Pending
- 1994-10-04 CN CN94118641A patent/CN1058758C/zh not_active Expired - Fee Related
- 1994-10-05 US US08/319,460 patent/US5503687A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2518452A1 (de) * | 1974-06-12 | 1976-01-02 | Allegheny Ludlum Ind Inc | Verfahren zum herstellen austenitischer eisenhaltiger legierungen |
US4154629A (en) * | 1975-12-23 | 1979-05-15 | Kabushiki-Kaisha Fujikoshi | Process of case hardening martensitic stainless steels |
DE4033706C2 (fr) * | 1990-10-24 | 1991-07-11 | Hans Prof. Dr.-Ing. 4630 Bochum De Berns | |
DE4036381C1 (fr) * | 1990-11-15 | 1991-08-14 | Degussa Ag, 6000 Frankfurt, De |
Non-Patent Citations (2)
Title |
---|
H. BERNS: "Nichtrostende Stähle mit hohem Stickstoffgehalt", VDI ZEITSCHRIFT, vol. 136, no. 1/2, 1994, DüSSELDORF, DE, pages 74 - 76 * |
H.-J. SPIES: "Stand und Entwicklung des kontrollierten Gasnitrierens", NEUE HÜTTE, vol. 36, no. 7, July 1991 (1991-07-01), LEIPZIG, DE, pages 255 - 262 * |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0890656A1 (fr) * | 1997-07-12 | 1999-01-13 | Ipsen International GmbH | Procédé de nitruration de surfaces de pièces métalliques |
WO1999005340A1 (fr) * | 1997-07-21 | 1999-02-04 | Nsk-Rhp European Technology Co. Limited | Cementation d'aciers |
EP1956099A1 (fr) | 2007-02-02 | 2008-08-13 | WMF Aktiengesellschaft | Couvert de service en acier ferritique inoxydable avec couche de surface martensitique |
US8349094B2 (en) | 2007-02-02 | 2013-01-08 | Wmf Aktiengesellschaft | Dining and/or serving cutlery made of ferritic stainless steel with a martensitic boundary layer |
US8597437B2 (en) | 2008-10-08 | 2013-12-03 | Peter Barth | Biocompatible material made of stainless steel having a martensitic surface layer |
DE202008015481U1 (de) | 2008-10-08 | 2009-06-18 | Barth, Peter, Dr. | Schmucksachen aus Edelstahl mit einer martensitischen Randschicht |
DE102008050458A1 (de) | 2008-10-08 | 2010-04-15 | Peter Dr. Barth | Schmucksachen aus Edelstahl mit einer martensitischen Randschicht |
WO2010040333A1 (fr) * | 2008-10-08 | 2010-04-15 | Peter Barth | Matériau en acier spécial biocompatible avec une couche de bord martensitique |
EP2351860A1 (fr) | 2008-10-08 | 2011-08-03 | Barth, Peter | Matière première biocompatible en acier inoxydable dotée d'une couche martensitique obtenue par trempe de la surface enrichie en azote. |
DE102009005578A1 (de) | 2009-01-21 | 2010-07-22 | Barth, Peter, Dr. | Medizinische Instrumente aus Edelstahl mit einer martensitischen Randschicht |
DE102011077368A1 (de) | 2011-06-10 | 2012-12-13 | BSH Bosch und Siemens Hausgeräte GmbH | Haushaltsgerät mit einem wärmebehandelten Haushaltsgeräte-Bauteil |
DE102012216117A1 (de) | 2012-09-12 | 2014-03-13 | Hilti Aktiengesellschaft | Verfahren zum Herstellen einer selbstschneidenden Schraube |
WO2014040995A1 (fr) | 2012-09-12 | 2014-03-20 | Hilti Aktiengesellschaft | Procédé de fabrication d'une vis autotaraudeuse |
EP3614028A1 (fr) | 2013-12-10 | 2020-02-26 | Parker-Hannifin Corporation | Férule à couches de dureté multiples et procédé |
WO2015173380A1 (fr) | 2014-05-15 | 2015-11-19 | Expanite Technology A/S | Rondelle de blocage |
US10100867B2 (en) | 2014-05-15 | 2018-10-16 | Expanite Technology A/S | Lock washer |
WO2017194359A1 (fr) * | 2016-05-12 | 2017-11-16 | Fischerwerke Gmbh & Co. Kg | Vis à béton autotaraudeuse |
CN111663097A (zh) * | 2020-06-17 | 2020-09-15 | 惠州濠特金属科技有限公司 | 奥氏体渗氮的工艺 |
Also Published As
Publication number | Publication date |
---|---|
CN1058758C (zh) | 2000-11-22 |
ES2296286T3 (es) | 2008-04-16 |
JPH07188733A (ja) | 1995-07-25 |
PL305287A1 (en) | 1995-04-18 |
RU2127330C1 (ru) | 1999-03-10 |
RU94035767A (ru) | 1997-04-20 |
EP0652300B1 (fr) | 2007-11-28 |
CZ240094A3 (en) | 1995-08-16 |
DE4333917C2 (de) | 1994-06-23 |
CN1107187A (zh) | 1995-08-23 |
DE4333917A1 (de) | 1994-03-24 |
PL178509B1 (pl) | 2000-05-31 |
US5503687A (en) | 1996-04-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE4333917C2 (de) | Randaufsticken zur Erzeugung einer hochfesten austenitischen Randschicht in nichtrostenden Stählen | |
DE2917287C2 (de) | Verfahren zum Herstellen von Schraubenfedern, Torsionsstäben oder dergleichen aus Federstahldraht | |
DE60214456T2 (de) | Martensitischer rostfreier Stahl mit hoher Härte und guter Korrosionsbeständigkeit | |
AT407057B (de) | Profiliertes walzgut und verfahren zu dessen herstellung | |
DE4411795A1 (de) | Nichtrostender Stahl für das Einsatzhärten mit Stickstoff | |
AT392654B (de) | Nichtrostender, ausscheidungshaertbarer martensitstahl | |
DE3874100T2 (de) | Verfahren zur herstellung von stahl mit niedrigem verhaeltnis der elastizitaetsgrenze zur bruchfestigkeit. | |
DE19712020A1 (de) | Vollmartensitische Stahllegierung | |
EP0123054B1 (fr) | Acier au chrome, résistant à la corrosion et procédé pour sa fabrication | |
DE69413632T2 (de) | Stickstoff enthaltendes martensitisches Stahl mit niedrigem Kohlenstoffgehalt und Verfahren zur Herstellung | |
DE69203228T2 (de) | Metalldraht aus einem stahlsubstrat mit kaltgehärteter geglühter martensitischer struktur und beschichtung. | |
DE1553841C3 (fr) | ||
DE19857156A1 (de) | Verfahren zum Herstellen eines Bleches aus martensitaushärtendem Stahl | |
DE69502609T2 (de) | Kavitationsbeständige fluidumschaufelräder und verfahren zu deren herstellung | |
DE2952079C2 (de) | Verfahren zur Herstellung einer Schweißverbindung | |
DE69107439T2 (de) | Hochfester rostfreier Stahl mit guten Zähigkeitseigenschaften, und Verfahren zu seiner Herstellung. | |
DE2745241A1 (de) | Hochmanganhaltige staehle mit verbesserter zaehigkeit und verfahren zu deren herstellung | |
DE2813736A1 (de) | Hochfester chrom-nickel-molybdaen- stahl | |
DE69111744T2 (de) | Stahl mit verbesserter Schweissbarkeit. | |
DE2118697C3 (de) | Verfahren zur Herstellung eines hochfesten, kohlenstoffarmen Baustahles mit guter Schweißbarkeit | |
EP0060577B1 (fr) | Matériau ayant une résistance élevée à la corrosion par la fatigue pour des aubes de turbine, procédé pour sa fabrication et son utilisation | |
DE1433793A1 (de) | Verfahren zur Waermebehandlung von mit Nb/Ta und/oder V niedriglegiertem Stahl und aus einem so behandelten Stahl hergestelltes Bauclement | |
DE2756191A1 (de) | Verfahren zur herstellung von bohrloch-auskleidungen | |
DE69203139T2 (de) | Verfahren zum Herstellung von verschliessfestem plattiertem Blech sowie auf diese Weise hergestelltes Blech. | |
DE1458325A1 (de) | Waermehaertbarer,rostfreier,legierter Chrom-Nickel-Molybdaen-Stahl |
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): AT BE CH ES FR GB IT LI NL SE |
|
17P | Request for examination filed |
Effective date: 19950906 |
|
17Q | First examination report despatched |
Effective date: 19960717 |
|
APAB | Appeal dossier modified |
Free format text: ORIGINAL CODE: EPIDOS NOAPE |
|
APAB | Appeal dossier modified |
Free format text: ORIGINAL CODE: EPIDOS NOAPE |
|
APAD | Appeal reference recorded |
Free format text: ORIGINAL CODE: EPIDOS REFNE |
|
APBZ | Receipt of observations in appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNOBA4E |
|
APBH | Information on receipt of observation in appeal deleted |
Free format text: ORIGINAL CODE: EPIDOSDOBA4E |
|
APBX | Invitation to file observations in appeal sent |
Free format text: ORIGINAL CODE: EPIDOSNOBA2E |
|
APBX | Invitation to file observations in appeal sent |
Free format text: ORIGINAL CODE: EPIDOSNOBA2E |
|
APBZ | Receipt of observations in appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNOBA4E |
|
APBT | Appeal procedure closed |
Free format text: ORIGINAL CODE: EPIDOSNNOA9E |
|
APAF | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH ES FR GB IT LI NL SE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: E. BLUM & CO. AG PATENT- UND MARKENANWAELTE VSP Ref country code: CH Ref legal event code: EP |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20071212 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2296286 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
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 |
Effective date: 20080829 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20130927 Year of fee payment: 20 Ref country code: CH Payment date: 20130919 Year of fee payment: 20 Ref country code: AT Payment date: 20130911 Year of fee payment: 20 Ref country code: NL Payment date: 20130918 Year of fee payment: 20 Ref country code: SE Payment date: 20130919 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20130919 Year of fee payment: 20 Ref country code: GB Payment date: 20130919 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20130919 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: 20130930 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: V4 Effective date: 20140917 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20140916 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK07 Ref document number: 379698 Country of ref document: AT Kind code of ref document: T Effective date: 20140917 |
|
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: 20140916 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20150108 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20140918 |