EP2034038B1 - Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique mou - Google Patents
Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique mou Download PDFInfo
- Publication number
- EP2034038B1 EP2034038B1 EP20080104705 EP08104705A EP2034038B1 EP 2034038 B1 EP2034038 B1 EP 2034038B1 EP 20080104705 EP20080104705 EP 20080104705 EP 08104705 A EP08104705 A EP 08104705A EP 2034038 B1 EP2034038 B1 EP 2034038B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- temperature
- tempering
- hardening
- nitrogen
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 29
- 238000005496 tempering Methods 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 238000005121 nitriding Methods 0.000 claims description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 239000012298 atmosphere Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 239000001294 propane Substances 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 description 25
- 238000009956 embroidering Methods 0.000 description 14
- 239000002344 surface layer Substances 0.000 description 8
- 229910000734 martensite Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000002347 wear-protection layer Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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
- 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
- C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
- C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
-
- 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
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
-
- 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
-
- 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
- C23C8/80—After-treatment
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Definitions
- the inventive method for producing a wear protection layer on a soft magnetic component has the advantage over that the component can have an almost arbitrarily thick, hard and wear-resistant edge layer, without the magnetic To significantly influence the properties of the component. That is, the magnetic properties of the component are retained, and further, a continuous transition of the hard edge layer can be ensured in the starting structure of the component. Furthermore, the component has a high corrosion resistance. Furthermore, a good load-bearing capacity results from the hard edge layer and the continuous transition in the component to the surface layer.
- the component is made of a chromium-containing, ferritic steel as a starting structure, wherein the production of the wear protection layer also causes a grain growth in the ferritic microstructure, which has a positive effect on the magnetic properties of the component.
- the process according to the invention comprises the steps of nitrogen infiltration, also referred to as "embroidering", at a temperature of at least 1000 ° C. or above, wherein the embroidering is carried out in an atmosphere having a nitrogen partial pressure of 0.1 ⁇ 10 5 Pa to 3 ⁇ 10 5 Pa takes place.
- hardening of the embroidered edge layer takes place.
- the tempering of the component takes place at a temperature of 20 ° C. to 650 ° C., in particular 400 ° C. to 650 ° C., in order to reduce stresses in the component.
- the embroidering is thus carried out in a relatively high temperature range.
- the combination of steps according to the invention thus makes it possible to set an advantageous combination of soft-magnetic properties and required surface layer hardness of the component in a controlled manner.
- an alternative inventive method for producing a wear protection layer on a soft magnetic component with high corrosion resistance only two steps are performed.
- nitrogen is embroidered in the first step at a temperature of 1000 ° C. or above, at a nitrogen partial pressure of 0.1 ⁇ 10 5 to 3 ⁇ 10 5 Pa, so that an embroidered edge layer is formed.
- the embroidered edge layer has a thickness which is less than or equal to 30 ⁇ m.
- the embroidered edge layer is then cured.
- a use of the method according to the invention for the treatment of soft magnetic components for solenoid valves e.g. a magnet armature.
- the method is used for components of fuel injection valves or fuel injection valves.
- the method according to the invention comprises three main steps, namely, firstly, embroidering at a temperature of or above 1000 ° C. at a nitrogen partial pressure of 0.1 ⁇ 10 5 Pa to 3 ⁇ 10 5 Pa, secondly subsequent hardening of the embroidered edge layer, and thirdly, tempering the component at a temperature between 20 ° C and 650 ° C, preferably between 400 ° C and 650 ° C.
- a component with a hard wear protection layer with high corrosion resistance can thus be provided, which also has the desired magnetic properties.
- the tempering time and / or tempering temperature By varying the tempering time and / or tempering temperature, the hardness H and the magnetic properties, in particular the magnetic force F of the component, can be influenced to a certain extent. Depending on the starting method, different starting times between 1 second and several hours are conceivable.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
- Soft Magnetic Materials (AREA)
Claims (11)
- Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique doux présentant une haute résistance à la corrosion, dans lequel on fabrique le composant magnétique doux en un acier ferritique contenant du chrome, comprenant les étapes suivantes:- d'abord nitrurer à une température de 1000°C ou plus sous une pression partielle d'azote de 0,1 x 105 à 3 x 105 Pa, de façon à former une couche superficielle nitrurée,- puis durcir la couche superficielle nitrurée, et- après l'étape de durcissement, réfrigérer à des températures inférieures à 0°C et au-delà, et- ensuite faire revenir le composant à une température de 20°C à 650°C, en particulier de 400°C à 650°C, afin de réduire les contraintes dans le composant et d'améliorer les propriétés magnétiques du composant, dans lequel on peut se passer du revenu lorsque la couche superficielle nitrurée présente une épaisseur inférieure ou égale à 30 µm.
- Procédé selon la revendication 1, caractérisé en ce que l'on effectue l'étape de revenu à une température de 520°C à 550°C.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on effectue l'étape de revenu pendant une durée comprise entre 1 seconde et 10 heures, en particulier entre 1 minute et 2 heures.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on opère la nitruration dans une atmosphère d'azote pur ou une atmosphère d'ammoniac pur ou dans un mélange gazeux contenant de l'azote et/ou de l'ammoniac.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on opère l'étape de nitruration dans un mélange gazeux composé d'un gaz libérant du carbone, en particulier du méthane ou du propane ou un hydrocarbure, et d'azote et/ou d'ammoniac.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la pression partielle d'azote se situe entre 0,2 x 105 et 1, 5 x 105 Pa.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on fait varier la pression partielle d'azote pendant l'étape de nitruration.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température pendant l'étape de nitruration se situe entre 1050°C et 1150°C et vaut en particulier environ 1100°C.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on opère le durcissement par trempe simple ou par double trempe.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on fait varier la température pendant l'étape de nitruration.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on exécute les étapes individuelles du procédé immédiatement l'une après l'autre.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710038983 DE102007038983A1 (de) | 2007-08-17 | 2007-08-17 | Verfahren zur Herstellung einer Verschleißschutzschicht an einem weichmagnetischen Bauteil |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2034038A2 EP2034038A2 (fr) | 2009-03-11 |
| EP2034038A3 EP2034038A3 (fr) | 2009-09-02 |
| EP2034038B1 true EP2034038B1 (fr) | 2013-07-10 |
Family
ID=39884695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20080104705 Active EP2034038B1 (fr) | 2007-08-17 | 2008-07-10 | Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique mou |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2034038B1 (fr) |
| DE (1) | DE102007038983A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014201097A1 (de) * | 2014-01-22 | 2015-07-23 | Robert Bosch Gmbh | Verfahren zur Herstellung eines Magnetventils |
| US10094014B2 (en) * | 2014-03-13 | 2018-10-09 | Nippon Steel & Sumitomo Metal Corporation | Nitriding method and nitrided part production method |
| DE102014113846A1 (de) * | 2014-09-24 | 2016-03-24 | Härterei Technotherm Gmbh & Co. Kg | Verfahren zur Behandlung eines Eisenwerkstoffs und behandelter Eisenwerkstoff |
| DE102016222904A1 (de) * | 2016-11-21 | 2018-05-24 | Robert Bosch Gmbh | Komponente, die zum Führen und/oder Speichern von zumindest einem Fluid und insbesondere für eine Brennstoffeinspritzanlage dient, Brennstoffeinspritzanlage und Verfahren zur Herstellung einer Komponente |
| CN114381696B (zh) * | 2021-11-30 | 2022-10-25 | 西安交通大学 | 一种微型多源金属超薄膜电极超高真空蒸镀装置及方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH374870A (de) * | 1957-03-05 | 1964-01-31 | Berghaus Elektrophysik Anst | Verfahren zum Nitrieren der Oberfläche von Gegenständen aus einer Metallegierung |
| DE3129939C2 (de) * | 1981-07-29 | 1985-03-28 | Vjačeslav N. Bukarev | Verfahren zum zweistufigen Nitrieren von Teilen aus Eisen |
| DE3146042A1 (de) * | 1981-11-20 | 1983-05-26 | Linde Ag, 6200 Wiesbaden | Verfahren zum einsatzhaerten metallischer werkstuecke |
| DE4421937C1 (de) | 1994-06-23 | 1995-12-21 | Bosch Gmbh Robert | Verfahren zur Behandlung von wenigstens einem Teil aus weichmagnetischem verschleißfesten Teil und seine Verwendung |
| DE102005039554A1 (de) * | 2005-08-22 | 2007-03-01 | Robert Bosch Gmbh | Verfahren zur Herstellung eines festen Gehäuses |
-
2007
- 2007-08-17 DE DE200710038983 patent/DE102007038983A1/de not_active Withdrawn
-
2008
- 2008-07-10 EP EP20080104705 patent/EP2034038B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2034038A2 (fr) | 2009-03-11 |
| DE102007038983A1 (de) | 2009-02-19 |
| EP2034038A3 (fr) | 2009-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2034038B1 (fr) | Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique mou | |
| EP2045339B1 (fr) | Pièce soumise à une usure par roulement en acier endurci et méthode de traitement thermique | |
| EP3645756B1 (fr) | Acier durcissable par formation de martensite et son utilisation, en particulier destiné à fabriquer une vis | |
| DE102017113918A1 (de) | Verfahren zur Herstellung eines Sinterzahnrades | |
| WO2006018348A1 (fr) | Procede pour produire un corps d'injecteur de carburant resistant a la temperature et a la corrosion | |
| DE102010028165A1 (de) | Verfahren zur Carbonitrierung von metallischen Bauteilen | |
| DE102012216117A1 (de) | Verfahren zum Herstellen einer selbstschneidenden Schraube | |
| DE102004053935B4 (de) | Verfahren zur Wärmebehandlung eines Bauteils aus einem durchhärtenden warmfesten Stahl und Bauteil aus einem durchhärtenden warmfesten Stahl | |
| DE102018208283A1 (de) | Verfahren zum Herstellen eines metallischen Bauteils | |
| EP3538676A1 (fr) | Procédé de traitement thermique d'une pièce à usiner constituée d'un acier fortement allié | |
| DE112011100602T5 (de) | Stahl für Gussformen mit ausgezeichneter Lochausbildungsmöglichkeit und verringerter Prozessverformung sowie Verfahren zu dessen Herstellung | |
| DE2527026C3 (de) | Verfahren zum Herstellen eines Bauteils hoher Lebensdauer | |
| DE10243179A1 (de) | Einsatzstahl für das Direkthärten nach langer Aufkohlungsdauer und Verfahren zur Herstellung einsatzgehärteter Werkstücke | |
| WO2008052851A1 (fr) | Pièce détachée de machine emboutie avec au moins une surface de glissement ou de guidage durcie, en particulier élément de moteurs | |
| DE10056842B4 (de) | Verfahren zur Oberflächenbehandlung von Druckspiralfedern | |
| DE102021211107A1 (de) | Verfahren zur Behandlung von Stahl, Bauteil umfassend Stahl sowie Verwendung davon | |
| DE102019202102A1 (de) | Verfahren zum Härten eines Bauteils | |
| DE102021120602A1 (de) | Verfahren zur Härtung eines Sinterbauteils | |
| DE102004051885A1 (de) | Mechanisch belastbares Stell- oder Lagerbauteil aus mechanisch gehärtetem Stahl | |
| DE10227521A1 (de) | Bauelement mit einem Bereich aus nichtmagnetischem Stahl und einer magnetischen Randschicht und Verfahren zu dessen Herstellung | |
| DE3525071C1 (de) | Verfahren zur Herstellung hochbelastbarer Maschinenteile aus mikro-legiertem Stahl mit zähem, hochfestem Kern und einer verschleißfesten Fe↓2↓B-Randschicht | |
| DE102020202259A1 (de) | Gleitelement, insbesondere Kolbenring, und Verfahren zur Herstellung desselben | |
| WO2024037954A1 (fr) | Procédé de traitement thermique d'aciers au chrome | |
| DE102020122734A1 (de) | Wärmebehandlungsverfahren für sekundärhärtende Stähle | |
| EP3783120A1 (fr) | Fil de ressort, pince de serrage formée à partir dudit fil de ressort et procédé de fabrication d'un tel fil de ressort |
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: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
| 17P | Request for examination filed |
Effective date: 20100302 |
|
| 17Q | First examination report despatched |
Effective date: 20100408 |
|
| AKX | Designation fees paid |
Designated state(s): DE FR IT |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| INTG | Intention to grant announced |
Effective date: 20130418 |
|
| 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): DE FR IT |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502008010269 Country of ref document: DE Effective date: 20130905 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20130719 Year of fee payment: 6 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20130729 Year of fee payment: 6 |
|
| 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: 20140411 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502008010269 Country of ref document: DE Effective date: 20140411 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20150331 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140710 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140731 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 502008010269 Country of ref document: DE |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20230922 Year of fee payment: 16 |