EP3167094B1 - Verfahren zum nitrieren eines bauteils eines kraftstoffeinspritzsystems - Google Patents
Verfahren zum nitrieren eines bauteils eines kraftstoffeinspritzsystems Download PDFInfo
- Publication number
- EP3167094B1 EP3167094B1 EP15726870.7A EP15726870A EP3167094B1 EP 3167094 B1 EP3167094 B1 EP 3167094B1 EP 15726870 A EP15726870 A EP 15726870A EP 3167094 B1 EP3167094 B1 EP 3167094B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- nitriding
- nitrogen
- injection system
- nozzle body
- 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
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- 238000005121 nitriding Methods 0.000 title claims description 58
- 238000000034 method Methods 0.000 title claims description 36
- 239000000446 fuel Substances 0.000 title claims description 22
- 238000002347 injection Methods 0.000 title claims description 13
- 239000007924 injection Substances 0.000 title claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 48
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 150000007522 mineralic acids Chemical class 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- YYXHRUSBEPGBCD-UHFFFAOYSA-N azanylidyneiron Chemical compound [N].[Fe] YYXHRUSBEPGBCD-UHFFFAOYSA-N 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- -1 nitrogen-containing compound Chemical class 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- C23C8/02—Pretreatment of the material to be coated
-
- 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
-
- 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
- C23C8/34—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 more than one element being applied in more than one step
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/166—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9038—Coatings
Definitions
- the invention relates to a method for nitriding a high pressure loaded, made of an alloy steel component of a fuel injection system.
- the known nitriding method comprises, in a first step, a nitrocarburizing process in a salt bath and then in a second step a gas nitriding process at a temperature between 520 ° C and 580 ° C at low nitriding potential or low nitriding coefficient (in the range between 0.08 and 0, 5), ie in the so-called ⁇ -range of the teacher diagram.
- thermochemical diffusion nitration (ammonia, 24h, 480 ° C) of a nozzle body and / or a longitudinally movable nozzle needle, each of alloyed steel as parts of a fuel injection system.
- the nitriding method of the present invention minimizes the cavitation damage caused by the high pressure load by further increasing the ductility (toughness) under the material surface of the components by the nitriding method.
- the nitriding process has a positive effect on the swelling resistance. As a result, the life or fatigue strength of the components is increased.
- Activating reduces the resistance of the component to the diffusion of nitrogen. This step thus increases the nitridability of the component.
- the subsequent pre-oxidation leads to the component having a higher corrosion resistance during operation.
- the nitriding process according to the invention reduces, above all, the nitride inclusions along the grain boundaries in the diffusion layer compared with the known nitriding processes.
- the grain boundaries are less susceptible to breakage, which increases the toughness and thus the robustness against cavitation attack, as well as the swelling resistance of the component.
- the first nitriding characteristic K N, 1 is between 1 and 10, preferably between 2 and 8.
- the first nitriding characteristic K N, 1 is thus comparatively high. This results in the teacher diagram at temperatures between 520 ° C and 570 ° C substantially in the ⁇ -nitride region, which ensures a high nitrogen uptake of the activated and flowed around by the nitriding gas component.
- the second Nitrierkenniere K N, 2 is between 0.2 and 0.4.
- the second Nitrierkenniere K N, 2 is therefore relatively low. This obstructs a deep in-diffusion of a high nitrogen content into the component. It mainly increases the nitrogen content in the connecting layer; in the base material, the nitrogen content increases to not more than about 6%. The toughness of the component is thus largely retained.
- a component which has been nitrided by the process according to the invention has on its surface a mass fraction of the nitrogen of between 11% and 25%. This provides a very hard, cavitation, wear and corrosion resistant surface of the component.
- a component which has been nitrided by the method according to the invention at a first depth t 1 of 10 microns to the surface of the component, a mass fraction of nitrogen between 3% and 8% up.
- the comparatively large drop in the mass fraction of nitrogen already in 10 ⁇ m component depth leads to a comparatively high toughness of the component despite the high surface hardness.
- the transition from the connecting layer to the diffusion layer is also approximately at this component depth.
- a component which has been nitrided by the method according to the invention in a second depth t 2 of 15 microns to the surface of the component to a mass fraction of nitrogen between 2% and 7%. This leads to a further increase in the toughness of the component compared to known nitriding.
- a component which has been nitrided by the method according to the invention in a third depth t 3 of 20 microns to the surface of the component to a mass fraction of nitrogen between 2% and 6%. This leads to a further increase in the toughness of the component compared to known nitriding.
- the nitrogen content runs asymptotically to the end of the diffusion zone, and then drops relatively abruptly towards the end of the diffusion zone to the nitrogen content already contained in the base material.
- the diffusion zone extends to about 500 microns into the component interior.
- the nitrogen content is lowered so far from the third depth t 3 that only a few nitride intercalations form. The necessary toughness of the material is thus given from this component depth.
- the component is a nozzle body of a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, wherein the fuel injector has a nozzle needle which is longitudinally movably guided in the nozzle body. Due to the high pressure and the high flow rate of the fuel in the fuel injector and there especially in the nozzle body just just the nozzle body is suitable for a nitriding process according to the invention. For example, at the injection openings of the nozzle body, which open into the combustion chamber of the internal combustion engine, there may be a very high cavitation load. Due to the increased swelling resistance of the Nozzle body can be minimized by the nitriding process according to the invention caused by cavitation or even avoided altogether.
- Fig.1 shows a teacher diagram: The different state phases of the system iron-nitrogen of a component as a function of the temperature T and the nitriding coefficient K N are shown.
- the nitriding index K N is plotted logarithmically above the nitriding temperature T.
- the nitration time is not indicated in the teacher diagram, but usually ranges from 1 hour to 100 hours.
- K N p NH 3 p H 2 3 / 2
- p (NH 3 ) is the partial pressure of the ammonia and p (H 2 ) is the partial pressure of the hydrogen.
- the partial pressure is in each case the pressure in an ideal gas mixture which is assigned to a single gas component. That is, the partial pressure corresponds to the pressure that would be exerted by the single gas component in the presence of the respective volume.
- the Partial pressure is usually used instead of the mass concentration when considering the diffusion behavior of the dissolved gas.
- the state phases of the iron-nitrogen system are divided into an ⁇ -nitride region, a ⁇ -nitride region, a ⁇ '-nitride region, and an ⁇ -nitride region.
- ⁇ -nitrides have very high proportions of nitrogen and are generally found on the surface of the nitrided component, the so-called connection layer or the underlying diffusion layer.
- the y'-nitride region also has a high nitrogen content, but with more order of nitrogen atoms than in the ⁇ -nitride region.
- the y'-nitride region is also found in the bonding and diffusion layer. Both the ⁇ -nitride region and the y'-nitride region are comparatively hard and brittle.
- ⁇ -nitrides also occur, which have very high nitrogen concentrations.
- the ⁇ -nitride region has a comparatively low nitrogen concentration and is comparatively tough. ⁇ -nitride regions are usually found in the diffusion layer and in the base material.
- Fig.1 shows a hatched region 12, which is located substantially in the y'-nitride region, with a temperature T in the range between about 520 ° C and 570 ° C and with a nitriding index K N in the range between about 0.2 and 0 ; 4.
- this hatched region identifies the process step with the low second nitriding characteristic K N, 2 .
- Fig.2 shows a diagram in which the mass fraction of the nitrogen "mass% of N" of a nitrided with the inventive method component over the component depth "t [ ⁇ m]” is plotted.
- the component depth t is perpendicular to the surface and the mass fraction of the nitrogen is specified for a range which is at least 1 mm from the next edge or the next contour transition.
- the curve “MAX” represents the maximum and the curve “MIN" the minimum mass fraction of the nitrogen of the treated component.
- the nitrogen-containing compound layer of a component treated with the method according to the invention is only about 5 ⁇ m to 10 ⁇ m thick and then the diffusion layer begins.
- the diffusion layer can extend to over 500 microns in the component depth, but for reasons of representation in the Fig.2 not shown.
- FIG. 3 schematically shows a part of a fuel injector 1, wherein only the essential areas are shown.
- the fuel injector 1 has a nozzle body 4, in which a pressure chamber 2 is formed.
- the pressure chamber 2 is filled with high-pressure fuel and is fed for example by a common rail, not shown, or a high-pressure pump, not shown, of a fuel injection system.
- a nozzle needle 3 is arranged longitudinally movable.
- the nozzle needle 3 opens and closes by their longitudinal movement in the nozzle body 4 formed injection openings 5 for injecting fuel into a combustion chamber of an internal combustion engine, not shown.
- the nozzle body 4 is exposed to cavitation risks, especially in the area of the injection openings 5.
- the nitriding method according to the invention is used.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014213510.9A DE102014213510A1 (de) | 2014-07-11 | 2014-07-11 | Verfahren zum Nitrieren eines Bauteils eines Kraftstoffeinspritzsystems |
PCT/EP2015/059781 WO2016005073A1 (de) | 2014-07-11 | 2015-05-05 | Verfahren zum nitrieren eines bauteils eines kraftstoffeinspritzsystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3167094A1 EP3167094A1 (de) | 2017-05-17 |
EP3167094B1 true EP3167094B1 (de) | 2019-07-10 |
Family
ID=53284201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15726870.7A Active EP3167094B1 (de) | 2014-07-11 | 2015-05-05 | Verfahren zum nitrieren eines bauteils eines kraftstoffeinspritzsystems |
Country Status (7)
Country | Link |
---|---|
US (1) | US10125734B2 (ko) |
EP (1) | EP3167094B1 (ko) |
JP (1) | JP6456000B2 (ko) |
KR (1) | KR102337455B1 (ko) |
CN (1) | CN106661712B (ko) |
DE (1) | DE102014213510A1 (ko) |
WO (1) | WO2016005073A1 (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109312444B (zh) * | 2016-09-30 | 2021-01-15 | 同和热处理技术株式会社 | 连续氮化处理炉和连续氮化处理方法 |
JP6345320B1 (ja) | 2017-07-07 | 2018-06-20 | パーカー熱処理工業株式会社 | 表面硬化処理装置及び表面硬化処理方法 |
DE102017117483A1 (de) * | 2017-08-02 | 2019-02-07 | Schaeffler Technologies AG & Co. KG | Verfahren zur Herstellung einer Wälzlagerkomponente aus Stahl |
CN109811297A (zh) * | 2017-11-21 | 2019-05-28 | 上海一普顿金属制品有限公司 | 一种热锻模具表面的氮化工艺 |
CN117157423A (zh) | 2020-10-15 | 2023-12-01 | 康明斯公司 | 燃料系统部件 |
CN112442650B (zh) * | 2020-11-11 | 2023-04-28 | 中国航发中传机械有限公司 | 发动机氮化齿轮表面硬度、粗糙度及白层深度的精确控制方法 |
JP2022125513A (ja) * | 2021-02-17 | 2022-08-29 | パーカー熱処理工業株式会社 | 鋼部材の窒化処理方法 |
CN113106378B (zh) * | 2021-04-07 | 2023-03-24 | 潍坊丰东热处理有限公司 | 一种中碳合金钢配件的热处理方法 |
DE102022208459A1 (de) * | 2022-08-15 | 2024-02-15 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Wärmebehandeln von Chromstählen |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4264380A (en) | 1979-11-16 | 1981-04-28 | General Electric Company | Nitride casehardening process and the nitrided product thereof |
DE707661T1 (de) * | 1994-04-22 | 1996-10-10 | Innovatique Sa | Verfahren und ofen zum nitrieren von metallischen formteilen bei niedrigen druck |
JP2916751B2 (ja) * | 1995-09-08 | 1999-07-05 | 鹿児島県 | オーステナイト系ステンレス鋼表面の窒化処理方法 |
AT3588U1 (de) | 1999-12-07 | 2000-05-25 | Steyr Daimler Puch Ag | Verfahren zum nitrieren bzw. nitrocarburieren von werkstücken aus legierten stählen |
DE10056842B4 (de) * | 2000-11-16 | 2005-06-23 | Robert Bosch Gmbh | Verfahren zur Oberflächenbehandlung von Druckspiralfedern |
JP4510309B2 (ja) | 2001-02-21 | 2010-07-21 | ヤンマー株式会社 | 燃料噴射弁体およびそのガス窒化処理方法 |
DE10147205C1 (de) | 2001-09-25 | 2003-05-08 | Bosch Gmbh Robert | Verfahren zur Wärmebehandlung von Werkstücken aus temperaturbeständigen Stählen |
EP1318529A3 (de) * | 2001-12-10 | 2004-01-14 | Vacuumschmelze GmbH & Co. KG | Oberflächengehärtetes weichmagnetisches Aktuatorteil und dessen Herstellverfahren |
DE10256590A1 (de) | 2002-12-04 | 2004-06-03 | Daimlerchrysler Ag | Einspritzdüse für ein Einspritzsystem sowie ein Verfahren zur Herstellung einer Einspritzdüse eines Einspritzsystems eines Kraftfahrzeuges |
DE102004039926B4 (de) | 2004-08-18 | 2016-09-22 | Robert Bosch Gmbh | Verfahren zur Herstellung eines temperatur- und korrosionsbeständigen Kraftstoffinjektorkörpers |
JP4686575B2 (ja) * | 2008-06-24 | 2011-05-25 | 新潟原動機株式会社 | ディーゼルエンジン用燃料噴射装置及びその製造方法並びに弁装置 |
US20100025500A1 (en) | 2008-07-31 | 2010-02-04 | Caterpillar Inc. | Materials for fuel injector components |
JP5883727B2 (ja) * | 2012-06-01 | 2016-03-15 | 株式会社日本テクノ | ガス窒化及びガス軟窒化方法 |
-
2014
- 2014-07-11 DE DE102014213510.9A patent/DE102014213510A1/de not_active Withdrawn
-
2015
- 2015-05-05 JP JP2017501185A patent/JP6456000B2/ja active Active
- 2015-05-05 US US15/325,426 patent/US10125734B2/en active Active
- 2015-05-05 KR KR1020177003639A patent/KR102337455B1/ko active IP Right Grant
- 2015-05-05 CN CN201580037944.9A patent/CN106661712B/zh active Active
- 2015-05-05 EP EP15726870.7A patent/EP3167094B1/de active Active
- 2015-05-05 WO PCT/EP2015/059781 patent/WO2016005073A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20170138326A1 (en) | 2017-05-18 |
KR20170031182A (ko) | 2017-03-20 |
CN106661712A (zh) | 2017-05-10 |
JP2017528635A (ja) | 2017-09-28 |
KR102337455B1 (ko) | 2021-12-13 |
CN106661712B (zh) | 2019-05-28 |
WO2016005073A1 (de) | 2016-01-14 |
US10125734B2 (en) | 2018-11-13 |
EP3167094A1 (de) | 2017-05-17 |
DE102014213510A1 (de) | 2016-02-18 |
JP6456000B2 (ja) | 2019-01-23 |
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