CN102666907A - Nitriding process for maraging steel - Google Patents
Nitriding process for maraging steel Download PDFInfo
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- CN102666907A CN102666907A CN2010800584991A CN201080058499A CN102666907A CN 102666907 A CN102666907 A CN 102666907A CN 2010800584991 A CN2010800584991 A CN 2010800584991A CN 201080058499 A CN201080058499 A CN 201080058499A CN 102666907 A CN102666907 A CN 102666907A
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- titanium
- maraging steel
- work
- residual stress
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- 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
- 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
- C21D1/68—Temporary coatings or embedding materials applied before or during heat 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
-
- 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
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/72—Temporary coatings or embedding materials applied before or during heat treatment during chemical change of 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/02—Hardening by precipitation
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C23C8/40—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
- 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
Abstract
Provided is a nitriding process for maraging steel, by which the compressive residual stress of maraging steel can be enhanced. On the surface of a work of maraging steel, part of the titanium solid-soluted in the work is oxidized with oxygen to form titanium oxide (TiO2) on the surface of the work positively, whereby the concentration of titanium oxide on the surface is enhanced (solution treatment step); since titanium present in the form of an oxide does not react with nitrogen in a nitriding step, the resulting work is subjected to sufficient reduction pretreatment prior to a nitriding step to conduct the removal of oxygen; thus, the surface concentration of titanium present in an active state is enhanced; and then the work thus pretreated is subjected to nitriding, whereby the reduced titanium and the solid-soluted titanium are bonded to nitrogen to form titanium nitride (TiN). In this nitriding step, the titanium present in the work is in an active state and therefore can be easily nitrided. Further, the surface concentration of titanium present in an active state is high, so that much nitrogen can penetrate into the work.
Description
Technical field
The present invention relates to contain the nitridation treatment method of the maraging steel of titanium, particularly relate to the improvement of the control techniques of compressive residual stress.
Background technology
In steel, be purpose, give compressive residual stress to the surface through nitriding treatment to improve intensity.At this moment, when being endowed superfluous compressive residual stress, it is responsive that otch susceptibility becomes, and loses toughness, therefore, need give the residual stress of appropriateness.
When difficult nitriding steel was suitable for nitriding treatment, the sull that the steel surface exists hindered nitrogenize.For example, in maraging steel, in the solid solution operation, easily and the surface concn of the atom of oxygen bonded titanium etc. when high, form the sull of its atom.For this reason, in the nitrogenize operation owing to hinder nitrogenize, so can not give sufficient compressive residual stress.Therefore, proposed through in the atmosphere of doing one's utmost anti-oxidation, carrying out solution treatment, thereby realized suppressing easily and the scheme (for example patent documentation 1) of the surface densification of oxygen bonded atom.
The look-ahead technique document
Patent documentation
Patent documentation 1: the spy opens the 2004-162134 communique
But, in the technology of patent documentation 1, can not give sufficient compressive residual stress to the maraging steel surface.In addition, also insufficient as the reduction processing that the pre-treatment of nitriding treatment is carried out, therefore, under the state that the oxygen on maraging steel surface can not fully be removed, carry out nitrogenize, consequently, the raising of compressive residual stress is limited.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of nitridation treatment method of maraging steel of the raising that can realize compressive residual stress.
The present inventor has carried out research with keen determination to the nitridation treatment method of titaniferous maraging steel; Its result finds, and in the solid solution operation, suppresses technological different with the patent documentation 1 of the surface densification of the easy bonded titanium of oxygen, in the solid solution operation, passes through the surface densification of promotion titanium oxide; And before the nitrogenize operation, reduce processing according to the surface concn of titanium oxide; Promote nitrogenize, thereby can carry out the control of compressive residual stress, thereby accomplished the present invention.
The nitridation treatment method of maraging steel of the present invention; Comprise: through the maraging steel that contains titanium is carried out solution treatment; Thereby form the solid solution operation that titanium oxide makes its multiviscosisty on the surface; Make the reduction operation of titanium multiviscosisty on the surface with the reduction titanium oxide and through the maraging steel in surperficial titanium multiviscosisty is carried out nitriding treatment, thereby give the nitrogenize operation of compressive residual stress the surface.
In the nitridation treatment method of maraging steel of the present invention, at first, the maraging steel that contains titanium (Ti) is carried out solution treatment, thus, form titanium oxide (TiO on the surface
2) (solid solution operation).Specifically, shown in Fig. 1 (A), the some of the titanium of solid solution in the workpiece that is made up of maraging steel and the oxidizing reaction of oxygen are taken place at workpiece surface, titanium oxide is generated and multiviscosisty energetically at workpiece surface.Thus, the surface concn of titanium uprises.Thisly in the solid solution operation, form the technological thought of titanium oxide energetically and the technology of patent documentation 1 has a great difference.
Then, the reduction titanium oxide makes titanium multiviscosisty (reduction operation) on the surface.Specifically, when titanium exists with the oxide compound state, can not combine, therefore,, shown in Fig. 1 (B), can remove deoxidation through fully reduce processing as the pre-treatment of nitriding treatment with N in the nitriding treatment.Thus, the surface concn that is in the titanium of active condition uprises.
Then, through the maraging steel in surperficial titanium multiviscosisty is carried out nitriding treatment, give compressive residual stress (nitrogenize operation) to the surface.Specifically, shown in Fig. 1 (C), through nitriding treatment, the titanium that is reduced and the titanium of solid solution through with nitrogen combine to form titanium nitride (TiN).At this moment, titanium is in active condition, therefore easily by nitrogenize, and, at this moment, be in the surface concn height of the titanium of active condition, so a large amount of nitrogen can immerse in the workpiece.As its result, the compressive residual stress that the nitrogenize through titanium is endowed workpiece surface uprises, and therefore, can realize that intensity significantly improves.
The nitridation treatment method of maraging steel of the present invention can use various formations.In the solid solution operation of maraging steel,, can control the surface densification of titanium oxide through management atmosphere.In addition, in the reduction operation before the nitrogenize operation,, can control the amount of removing of oxygen through the management reductive condition.Can give compressive residual stress arbitrarily to the maraging steel surface through making up these multiviscosisty controls and reduction control.At this moment, compare,, for example, preferably the titanium concentration in the surface of the maraging steel after the solid solution operation is set at more than the 13.0at% in order to obtain compressive residual stress with existing.And preferably in the reduction operation, using reducing gas, the flow set of this reducing gas is 24.7L/m
3More than.
In solution treatment, can be suitable for for example vacuum-treat and atmosphere processing etc., use stove, can use a batch stove, continuous oven, meshbeltfurnace etc. as solution treatment.In the reduction operation, can use NF
3Gas etc.As the parts that the nitridation treatment method of maraging steel of the present invention preferably is suitable for, the annular metal band of the use during for example buncher (CVT) waits of can giving an example.
The invention effect
According to the nitridation treatment method of maraging steel of the present invention, through the surface densification of solution treatment promotion titanium oxide, and, through before nitriding treatment, reducing processing, can improve the surface concn of titanium, therefore can promote nitrogenize.Consequently, high compressive residual stress can be accessed, therefore, intensity can be made significantly.
Description of drawings
Fig. 1 (A)～(C) is the concept map of maraging steel surface portion of a mode of each operation of the nitridation treatment method of expression maraging steel of the present invention; (A) be the concept map of solid solution operation; (B) be the concept map of reduction operation, (C) be the concept map of nitrogenize operation.
Fig. 2 is the summary pie graph of manufacturing process of annular metal band of the embodiment of the expression nitridation treatment method that has been suitable for maraging steel of the present invention.
Fig. 3 is result's the graphic representation of the embodiment of the expression nitridation treatment method that has been suitable for maraging steel of the present invention.
Nomenclature
1 ... Thin plate, 2 ... Cylinder, 3 ... Process furnace, 4 ... Ring
Embodiment
Below, specify the present invention with reference to concrete embodiment.In an embodiment, the nitridation treatment method of maraging steel of the present invention is applicable to the method for manufacture of annular metal band.
In the manufacturing of annular metal band, as shown in Figure 2, at first, the thin plate 1 that is made up of maraging steel welds the two ends of thin plate 1 to form mode cylindraceous, thereby forms cylinder 2 (welding sequence).At this moment, because the heat of welding, therefore a part of 2a hardization of cylinder 2, through in process furnace 3, cylinder 2 being carried out the 1st solution treatment, homogenizes the hardness of cylinder 2 (the 1st solid solution operation).Then, cylinder 2 is cut to Rack, forms a plurality of endless belt-shaped rings 4 (cylinder cut-out operation).Then, will encircle 4 and be rolled down to specific thickness (ring-rolling operation).At this moment, because rolling, the distortion of the metal structure of ring 4, therefore, and through carrying out solution treatment once again to encircling 4, the recrystallizing of the metal structure that encircles (the 2nd solid solution operation).In the 2nd solid solution operation,, form titanium oxide on the surface and make its multiviscosisty through management atmosphere.
Then, ring 4 is modified to the girth (ring girth correction operation) of regulation.At this moment, the girth of mutual ring 4 is dissimilated bit by bit.Then, to encircle 4 carry out ageing treatment after, through carrying out nitriding treatment, make ring 4 hardness and wearability raising (timeliness, nitrogenize operation) to encircling 4.At this moment, before nitriding treatment,, improve the surface concn (reduction operation) of the titanium that is in active condition through reducing processing to encircling 4.Then, range upon range of through encircling 4, make annular metal band (circular layer is folded operation).
In an embodiment, carry out welding sequence～the 2nd solid solution operation in the method for manufacture of above-mentioned annular metal band, resulting ring 4 is used as experiment slice 11～13.
As experiment slice 11～13; Use following maraging steel: contain 0.004% C, 0.02% Si, 0.01% Mn, 0.002% P, be lower than 0.001% S, 18.58% Ni, 0.02% Cr, 4.99% Mo, 9.28% Co, 0.01% Cu, 0.12% Al, 0.47% Ti, 0.0004% N in quality %, surplus is iron and unavoidable impurities.Also have, among the embodiment, have the maraging steel of above composition though use, as long as at following composition range.For example; Also can be following maraging steel: in quality % contain below the C:0.01%, below the Si:0.10%, below the Mn:0.10%, below the P:0.005%, below the S:0.005%, below the Cr:0.05%, below the Cu:0.04%; And containing 17～19% Ni, 4.5～5.5% Mo, 9.2～9.5% Co, 0.05～0.15% Al, 0.40～0.50% Ti, surplus is iron and unavoidable impurities.
In the 1st solid solution operation and the 2nd solid solution operation, for experiment slice 11～13 each, use the process furnace shown in the table 1, and set atmosphere.More than the recrystallization temperature of maraging steel and the temperature of the scope below 850 ℃ carry out the 1st solid solution operation and the 2nd solid solution operation.In the 2nd solid solution operation,, thus, the surface concn of titanium is controlled at the scope of 4.1～31.4atm% with the scope of oxygen concn management at 0.1～14ppm.The surface concn of titanium is used μ ESCA (the system Quantera SXM of ア Le バ Star Network Off ァ イ society), analyzes from the experiment slice surface.The surface concn of the titanium shown in the table 1 is the peak concentration (at%) of the titanium in from the experiment slice surface to the 50nm scope.During the reduction of before nitriding treatment, carrying out is handled, use NF as reducing gas
3Gas is about NF
3The gas usage quantity is set at 12.3L/m with the usage quantity of unit volume
3, be that benchmark is set in 0～61.7L/m with this unit usage quantity
3Scope in.
[table 1]
| Use stove | Atmosphere | Oxygen concn ppm | Ti concentration at% after the solution treatment | |
| Experiment slice 11 | Meshbeltfurnace | N 2+H 2(N 2：71.4％、H 2：28.6％) | 0.1 | 4.1 |
| Experiment slice 12 | Meshbeltfurnace | N 2(N 2：100％) | 5 | 13.0 |
| Experiment slice 13 | Vacuum oven | Vacuum (vacuum tightness 5x10 -3Pa) | 14 | 31.4 |
For the ring that as above obtains is that experiment slice 11～13 is measured residual stress.In residual stress is measured, use X ray stress determination device (Co., Ltd.'s リ ガ Network splits PSPC/MSF-3M), measure the residual stress of ring periphery at plate width direction (in the periphery with circumferential orthogonal direction).Consequently like table 2 and shown in Figure 3.Compressive residual stress value behind each surface concn of titanium after the solution treatment in table 2 demonstration the 2nd solid solution operation and the nitriding treatment of each reducing gas usage quantity, Fig. 3 representes the graphic representation of the relation of the surface concn of the titanium after the solution treatment shown in the table 2 and the compressive residual stress value behind the nitriding treatment.
[table 2]
Can confirm from Fig. 3 and table 2, form titanium oxide on maraging steel surface, before nitriding treatment, reduce processing, can improve compressive residual stress through solution treatment.Confirm that particularly in order to obtain high compressive residual stress, preferably the titanium concentration with the surface of the maraging steel after the solution treatment is set at more than the 13.0at%.In addition, confirm also that the flow set of the reducing gas in handling of preferably will reducing is 24.7L/m in order to obtain high compressive residual stress
3More than.
Claims (3)
1. the nitridation treatment method of a maraging steel is characterized in that, comprising: through the maraging steel that contains titanium is carried out solution treatment, thereby form titanium oxide on the surface and make the solid solution operation of this titanium oxide multiviscosisty; The said titanium oxide that reduces makes the reduction operation of titanium multiviscosisty on said surface; Through to making the maraging steel of titanium multiviscosisty carry out nitriding treatment on said surface, thereby give the nitrogenize operation of compressive residual stress to said surface.
2. the nitridation treatment method of maraging steel according to claim 1 is characterized in that, the titanium concentration in the said surface of the said maraging steel after the said reduction operation is set at more than the 13.0at%.
3. the nitridation treatment method of maraging steel according to claim 1 and 2 is characterized in that, uses reducing gas in the said reduction operation, and the flow set of said reducing gas is 24.7L/m
3More than.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009295131 | 2009-12-25 | ||
| JP2009-295131 | 2009-12-25 | ||
| PCT/JP2010/071924 WO2011077945A1 (en) | 2009-12-25 | 2010-12-07 | Nitriding process for maraging steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102666907A true CN102666907A (en) | 2012-09-12 |
Family
ID=44195480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800584991A Pending CN102666907A (en) | 2009-12-25 | 2010-12-07 | Nitriding process for maraging steel |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120241050A1 (en) |
| EP (1) | EP2518177A4 (en) |
| JP (1) | JP5606453B2 (en) |
| CN (1) | CN102666907A (en) |
| WO (1) | WO2011077945A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011135624A1 (en) * | 2010-04-28 | 2011-11-03 | トヨタ自動車株式会社 | Metal ring and method for producing same |
| JP6202034B2 (en) | 2015-04-06 | 2017-09-27 | トヨタ自動車株式会社 | Metal ring and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5298089A (en) * | 1991-07-08 | 1994-03-29 | Air Products And Chemicals, Inc. | In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen |
| JPH07188896A (en) * | 1993-12-27 | 1995-07-25 | Toyota Motor Corp | Forming method of cr nitride film |
| JP2000087214A (en) * | 1998-09-10 | 2000-03-28 | Daido Hoxan Inc | Nitriding method for maraging steel and maraging steel product obtained thereby |
| JP2002167252A (en) * | 2000-11-30 | 2002-06-11 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2006124757A (en) * | 2004-10-27 | 2006-05-18 | Toyota Motor Corp | Method for manufacturing endless metallic belt |
| JP2006318652A (en) * | 2005-05-10 | 2006-11-24 | Nisshin Steel Co Ltd | Solid oxide type fuel cell separator material |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5953327B2 (en) * | 1981-09-22 | 1984-12-24 | 川崎製鉄株式会社 | Method for producing 18% Ni maraging steel with excellent fracture toughness |
| DE10010383B4 (en) * | 1999-03-04 | 2004-09-16 | Honda Giken Kogyo K.K. | Process for the production of maraging steel |
| JP2002167652A (en) * | 2000-11-28 | 2002-06-11 | Daido Steel Co Ltd | Thin sheet material excellent in high strength-high fatigue resisting characteristic |
| JP3677460B2 (en) * | 2001-04-06 | 2005-08-03 | 本田技研工業株式会社 | Steel manufacturing method |
| CN100460552C (en) * | 2002-09-24 | 2009-02-11 | 本田技研工业株式会社 | Method of nitriding metal ring and apparatus therefor |
| JP3871211B2 (en) | 2002-11-14 | 2007-01-24 | トヨタ自動車株式会社 | Endless metal belt manufacturing method and apparatus |
-
2010
- 2010-12-07 WO PCT/JP2010/071924 patent/WO2011077945A1/en active Application Filing
- 2010-12-07 JP JP2011547453A patent/JP5606453B2/en active Active
- 2010-12-07 US US13/514,062 patent/US20120241050A1/en not_active Abandoned
- 2010-12-07 CN CN2010800584991A patent/CN102666907A/en active Pending
- 2010-12-07 EP EP10839179.8A patent/EP2518177A4/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5298089A (en) * | 1991-07-08 | 1994-03-29 | Air Products And Chemicals, Inc. | In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen |
| JPH07188896A (en) * | 1993-12-27 | 1995-07-25 | Toyota Motor Corp | Forming method of cr nitride film |
| JP2000087214A (en) * | 1998-09-10 | 2000-03-28 | Daido Hoxan Inc | Nitriding method for maraging steel and maraging steel product obtained thereby |
| JP2002167252A (en) * | 2000-11-30 | 2002-06-11 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2006124757A (en) * | 2004-10-27 | 2006-05-18 | Toyota Motor Corp | Method for manufacturing endless metallic belt |
| JP2006318652A (en) * | 2005-05-10 | 2006-11-24 | Nisshin Steel Co Ltd | Solid oxide type fuel cell separator material |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011077945A1 (en) | 2011-06-30 |
| JP5606453B2 (en) | 2014-10-15 |
| JPWO2011077945A1 (en) | 2013-05-02 |
| US20120241050A1 (en) | 2012-09-27 |
| EP2518177A1 (en) | 2012-10-31 |
| EP2518177A4 (en) | 2014-03-19 |
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Application publication date: 20120912 |