CN1032264C - Method of nitriding nickel alloy - Google Patents
Method of nitriding nickel alloy Download PDFInfo
- Publication number
- CN1032264C CN1032264C CN92102171A CN92102171A CN1032264C CN 1032264 C CN1032264 C CN 1032264C CN 92102171 A CN92102171 A CN 92102171A CN 92102171 A CN92102171 A CN 92102171A CN 1032264 C CN1032264 C CN 1032264C
- Authority
- CN
- China
- Prior art keywords
- gas
- nitriding
- nickelalloy
- nickel alloy
- fluorine
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- 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
- C23C8/36—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 using ionised gases, e.g. ionitriding
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
A method of nitriding nickel alloy comprising heating nickel alloy in an atmosphere of fluorine- or fluoride-containing gas to fluorinate the nickel alloy and heating the fluorinated nickel alloy in a nitriding atmosphere. The nitrided nickel alloy has an improved surface hardness with a deep uniform nitrided layer on its surface.
Description
The present invention relates on nickel alloy surfaces, form the method for nitride layer with the nitriding nickel alloy of enhancement surface hardness and other performances.
Contain nickelic alloy such as having obtained widespread use with its good heat-resisting and corrosion resisting property because of Cornell nickelalloy (Ni-Cr), Hastelloy (Ni-Cr-Mo) and Incoloy.Recently constantly increase about wear resistance and other performances of improving nickel-containing alloys and the demand of expanding its range of application.But above-mentioned nickelalloy for example because of the nickelalloy of Cornell, is promoted the method for its surface hardness and established as yet so far, only studied and be extrapolation method for curing that improves body material intensity and the application of using the superplasticity goods of powdered material.Yet because the extrapolation hardening process improves whole hardness of alloy, so the processability of alloy just suffers damage.Use the superplasticity goods of powdered material because the cost costliness also is difficult to be put to practical application.
Subsidiary mentioning, the case hardening process of common metal material mainly contains: (1) electrochemical plating, (2) coating such as PVD, (3) diffusion process is as nitrogenize and boronation.But, for nickelalloy, have only some coating, for example pure hard chrome plating and be coated with aluminum oxide and just partly drop into practical application above-mentioned.Those methods particularly have difficulty concerning coating aspect quality control, and because coating is too thin range of application is restricted.In addition, the expensive of processing also is a problem.As case-hardened method of diffusion, also the plasma nitrided method by using glow discharge partly to carrying out overtesting because of Cornell nickelalloy and Hastelloy.But so plasma nitrided hardened nitride layer that is difficult on above-mentioned nickelalloy, form.Even form, also can be the superthin layer that part forms, its thickness has only several microns.So in the present circumstance, almost abandon the test of the above-mentioned nickelalloy of nitrogenize, be far from making it to forward practical application to.
Therefore, the purpose of this invention is to provide a kind of method that can on nickel alloy surfaces, form uniform thick nitride layer with the nitriding nickel alloy that improves its surface hardness.
According to the present invention, above-mentioned purpose can realize by the method that following nitriding nickel alloy is provided, and this method comprises nickelalloy is remained in the gas atmosphere of fluorine-containing or fluoride heating and will heat the upper layer formation nitride layer that makes nickelalloy with the nickelalloy that fluorine was handled in nitriding atmosphere.
Of the present invention to liking nickelalloy, after it is fluoridized, in nitriding atmosphere, carry out nitrogenize in the gas atmosphere of fluorine-containing or fluoride.
Main use the nickeliferous nickelalloy that is higher than 25 weight % (below be abbreviated as %), for example Ni-Cr, Ni-Cr-Mo and Ni-Cr-Fe are as the nickelalloy of the invention described above object.More particularly, they are to contain nickelic alloy, for example because of Cornell nickelalloy, Hastelloy and Incoloy.So in the present invention, " nickelalloy " this term is meant nickeliferous 25% the alloy that is higher than.But, it is more suitable to contain the alloy of 25% above nickel.Method therefor had not both been stipulated the shape of nickelalloy, did not stipulate the degree of processing yet.Useful nickelalloy material, intermediate and the finished product made include in nickelalloy scope of the present invention.
The atmosphere that above-mentioned nickelalloy reacts therein be fluorine-containing or the fluoride gas atmosphere in gas fluorine-containing or fluoride be fluorine compound gas, such as NF
3, BF
3, CF
4, HF, SF
6, C
2F
6, WF
6, CHF
3Or SiF
4The use of can solely using or combine of these gases.In addition, can be used in the fluorine compound gas that contains F in its molecule and make above-mentioned fluorine-containing or fluoride gas.Can also use the F that in thermal decomposer, forms by the cracking fluorine compound gas
2Gas and previously prepared F
2Gas is as the gas of above-mentioned fluorine-containing or fluoride.According to circumstances, with such fluorine compound gas and F
2Gas mixes use.Above-mentioned fluorine-containing or close gas such as the fluorine compound gas and the F of fluorochemical
2Gas can use independently, but generally all uses inert gas such as N
2After being diluted, gas is used for handling.The concentration of the gas of fluorine-containing or fluoride itself for example should reach 10 in the gas of like this dilution, 000-100, and 000ppm better is 20,000-70,000ppm, and preferably 30,000-50,000ppm.
In the present invention, above-mentioned nickelalloy is fluoridized under heated condition in the gas atmosphere of the fluorine-containing or fluoride of such concentration.This is characteristic of the present invention.In this case, nickelalloy heating is remained on for example under the 550-600 ℃ of temperature.The hold-time of above-mentioned nickelalloy in the gas atmosphere of fluorine-containing or fluoride can be looked the geometrical shape of nickelalloy kind, alloy and size, Heating temperature or the like and suitably be selected, generally at more than ten minutes to dozens of minutes.Nickelalloy is handled in the gas atmosphere of so fluorine-containing or fluoride " N " atom is infiltrated in the nickelalloy, and this is impossible in the past.
Though the mechanism of infiltrating also is not verified now, can do following understanding substantially, promptly formed NiO zone of oxidation stops " N " atom of using for nitrogenize to infiltrate on nickel alloy surfaces.When the nickelalloy of band zone of oxidation being remained in the gas atmosphere of fluorine-containing or fluoride by above-mentioned heating, the NiO zone of oxidation just changes into and NiF
2Fluorinated layer." N " atom that is used for nitrogenize infiltrates NiF
2Fluorinated layer is more more or less freely than infiltrating the NiO zone of oxidation, that is to say that by above-mentioned fluoridation nickel alloy surfaces having been formed is suitable for the condition that " N " atom infiltrates.Therefore, can think that when nickelalloy remained in the nitriding atmosphere with the suitable condition of surface that absorbs " N " atom, " N " atom in the nitriding gas just penetrated into equably and reaches certain depth in the nickelalloy, the result forms dark and uniform nitride layer.
Then, as mentioned above, by having the nickelalloy of suitable condition of surface to remain on heating generation nitride in the nitriding atmosphere to absorbing " N " atom after the fluoridation.In the case, the nitriding gas of formation nitriding atmosphere is only by NH
3The pure gas of forming, or white NH
3With a kind of carbon source gas mixed gas of being formed of RX gas for example.Also can use the mixture of two kinds of gases.Usually use above-mentioned pure gas to mix with picture N
2Such rare gas element.According to circumstances, with H
2Gas is added in these gases.
In such nitriding atmosphere, make above-mentioned fluorizated nickelalloy keep heating, heating condition is set in 500-700 ℃ usually, and the treatment time is set in 3-6 hour scope.By this nitriding treatment, on above-mentioned nickel alloy surfaces, form dark and uniform fine and close nitride layer (forming) by complete simple layer, make nickel alloy surfaces hardness reach Hv=800~1100 whereby, by contrast the Hv=280 of body material~380.The thickness of hardened layer depends on nitriding temperature and time basically.But temperature surpasses 650 ℃ making nitride layer form the generation difficulty below 500 ℃ and work as temperature, and fluorinated layer is damaged, and nickel is easy to oxidation simultaneously, thereby causes forming inhomogeneous nitride layer.
On the other hand, fluoridize temperature and just can not generate a kind of enough fluorinated layers below 400 ℃ usually.The temperature that surpasses 600 ℃ in addition is unfavorable to production process, because the burner hearth material of retort furnace is owing to fierce fluoridation can be damaged.From forming the viewpoint of nitride layer, had better make the difference of fluoridizing between temperature and the nitriding temperature as much as possible little.For example, in case fluoridize and cool off after just carry out nitrogenize, just can not form suitable nitride layer.
Above-mentionedly fluoridize operation and the nitrogenize operation for example can be carried out in metal retort furnace as shown in Figure 1, promptly at first carry out fluoridation, within retort furnace, implement nitriding treatment then.In Fig. 1, reference number 1 is a retort furnace, the 2nd, and the shell of retort furnace, the 3rd, well heater, the 4th, inner vessels, the 5th, inlet pipe, the 6th, vapor pipe, the 7th, motor, the 8th, fan, the 11st, metal vessel, the 13rd, vacuum pump, the 14th, the toxic substance eliminator, 15 and 16 is gas cylinders, the 17th, under meter, the 18th, valve.Nikel alloy products 10 is placed in the stove 1, and the gas atmosphere by introducing fluorine-containing or fluoride is NF for example
3And fluoridation is carried out in heating.Effect by vacuum pump 13 is introduced gas in the vapor pipe 6, discharges behind the detoxification in toxic substance eliminator 14.Then, gas cylinder 16 is connected with conduit, nitriding gas is introduced carried out nitrogenize in the stove 1.After the nitrogenize, gas is discharged through vapor pipe 6 and toxic substance eliminator 14.Through this a series of operation, make to fluoridize and put into practice with nitrogenize.Also can use the device of the device replacement Fig. 1 among Fig. 2 in addition.This device is made up of the nitrogenize chamber of fluoridizing chamber and the right on the left side.In the figure, reference number 2 ' be metal vessel, 3 ' be well heater, 5 ' be vapor pipe, 6 ' and 7 ' for opening Yi Guangai, 11 ' be pedestal, 21 ' be the body of heater of being with diathermic wall, 22 is dividing plate moving up and down.Dividing plate 22 is divided into two cells 23 and 24 with the internal space of body of heater 21.Cell 23 designs are used as fluoridizes the chamber, and the 24th, as the nitrogenize chamber.Reference number 25 is the stands that comprise two tracks, and the metal vessel 2 of Nikel alloy products ' can slidably reciprocate in orbit is equipped with in inside between cell 23 and 24.Reference number 10 ' be the supporting of stand 25.Reference number 26 is gas introduction tubes, and it is introduced the gas of fluorine-containing or fluoride and fluoridizes chamber 23,27th, temperature sensor, the 28th, nitriding gas ingress pipe.As the material that meets the requirements of above-mentioned metal retort furnace 1 is high Refractoloy but not stainless material.
This device is a kind of continous processing system, and the heating of the internal temperature of wherein fluoridizing chamber 23 when carrying out nitrogenize in nitrogenize chamber 24 improves, and Nikel alloy products is fluoridized chamber 23 carrying out introducing under the fluorizated condition.After gas in the chamber 23 is fluoridized in discharge, Nikel alloy products is transplanted on nitrogenize chamber 24 together with metal vessel by opening and closing dividing plate 22.After this, under this condition, carry out nitrogenize, fluoridize continuously in this way and nitrogenize.
Select NF for use
3As the gas of fluorine-containing or fluoride for above-mentioned fluoridize especially suitable.That is to say NF
3Be a kind of gaseous substance easy to use, it is anergy at normal temperatures, is easy to operation and to the detoxification of vent gas.
Fig. 1 generally illustrates the structure of carrying out the processing stove of nitrogenize according to the present invention,
Fig. 2 generally illustrates the structure of another kind of stove,
Fig. 3 is the amplification sectional view of the nickelalloy plate (because of Cornell 600) of nitrogenize,
Fig. 4 is the amplification sectional view of the nickelalloy plate (because of Cornell 751) of nitrogenize,
Fig. 5 is the amplification sectional view of the nickelalloy plate (haas troy nickel-base alloy C) of nitrogenize.
Below the present invention is illustrated with implementing several modes of the present invention.
Example 1
To use because of Cornell 600 alloys (Ni76, Cr16, Fe8), because of Cornell 751 alloys (Ni73, Cr16, Ti2.5) and haas troy nickel-base alloy C (Ni56, Cr16, three kinds of nickelalloy sheet materials Mo7) making pack in as shown in Figure 1 the processing stove.After carrying out vacuum purge in the stove, be heated to 550 ℃.Under this state, in stove, charge into the gas (NF of fluorine-containing or fluoride then
310 volume %+N
290 volume %), in stove, form barometric point and kept this operating mode 30 minutes.After the gas of above-mentioned fluorine-containing or fluoride discharged in the stove, feed nitriding gas (NH
350 volume %+N
225 volume %+H
225 volume %), with stove internal heating to 570 ℃.Under this operating mode, carry out 3 hours nitriding treatment.Through this nitrogenize operation, on using, just form a kind of cementation zone B of nitride layer respectively because of Cornell 600 alloys, three kinds of nickelalloy plate surfaces making because of Cornell 751 alloys and haas troy nickel-base alloy C, its thickness is respectively 15 microns, 12 microns and 10 microns, as Fig. 3, Fig. 4 and shown in Figure 5.In these figure, the body material of " A " expression nickel-base alloy.The surface hardness of these cementation zones B is Hv=800~1000 in all cases in addition.
Example 2
To using, similarly carry out fluoridation respectively as example 1 because of Cornell 600 alloys, because of three kinds of nickelalloy plates that Cornell 751 alloys and haas troy nickel-base alloy C make.In stove, feed NH then as nitriding gas
350 volume %+N
2The mixed gas that 50 volume % form meanwhile carries out 3 hours nitriding treatment under 620 ℃.After the nitrogenize, use with described in the embodiment 1 similarly gas fluorine-containing or fluoride under 620 ℃, they are carried out 3 hours fluoridation, use the nitrogenize 3 hours once more under 620 ℃ of above-mentioned nitriding gas then.Like this each of three kinds of nickelalloys is implemented twice and fluoridize and nitriding treatment, measure the thickness of the hardened layer of forming by nitride layer that on these surfaces, forms then.The result is respectively 25 microns, 20 microns and 18 microns because of Cornell 600 alloys, because of the thin hardened layer of Cornell 751 alloys and haas troy nickel-base alloy C.The surface hardness of finding them is identical with example 1.
Example 3
Use is by F
210 volume %+N
2The mixed gas that 90 volume % form is as the gas of fluorine-containing or fluoride.Except that this difference, three kinds of nickelalloy plates are carried out and example 1 identical fluoridizing and nitriding treatment.As a result, after the processing, on three kinds of nickelalloy plate surfaces, formed the hard nitride layer identical with example 1, and also identical with example 1 of surface hardness.
As indicated above, the method of nitriding nickel alloy of the present invention comprises makes nickelalloy remain in the gas atmosphere of fluorine-containing or fluoride and heating, thereby remove attached to the organic and inorganic pollutant on the nickelalloy, make the zone of oxidation on the nickel alloy surfaces be converted into fluorinated layer simultaneously, make alloy stand nitriding treatment afterwards.Because the zone of oxidation on the nickel alloy surfaces is converted into fluorinated layer in this mode, the existence of fluorinated layer just makes nickel alloy surfaces be protected.Therefore, even from fluoridizing behind nitrogenize experience certain hour, above-mentioned fluorinated layer still can play the effect of protection nickel alloy surfaces.The result can not form zone of oxidation again on nickel alloy surfaces.Because this fluorinated layer can transmit " N " atom, " N " atom just can infiltrate in the nickel alloy surfaces layer of certain depth equably during nitrogenize.The uniform infiltration that the result forms can cause only forming fine and close nitride layer uniformly in the degree of depth of nickel alloy surfaces layer, and improves surface hardness significantly and do not improve the rigidity of nickelalloy matrix material.
Claims (4)
1, a kind of method of nitriding nickel alloy, comprise following operation: nickeliferous being higher than in the gas atmosphere that 25% nickelalloy remains on fluorine-containing or fluoride heated under 550-600 ℃ of temperature, the fluorizated nickelalloy is remained in the nitriding atmosphere heat, thereby in the nickel alloy surfaces layer, form nitride layer.
2, at least a by following listed (a) and (b) or (c) of the method for nitriding nickel alloy according to claim 1, the gas in the gas atmosphere of wherein fluorine-containing or fluoride and form for the rare gas element of dilution usefulness,
(a) contain and be selected from NF
3, BF
3, CF
4, HF, SF
6, C
2F
6, WF
6, CHF
3And SiF
4In the fluorine compound gas of at least a component,
(b) by the formed F2 gas of the above-mentioned fluorine compound gas of cracking (a),
(c) previously prepared F
2Gas.
3, the method for nitriding nickel alloy according to claim 1, wherein the gas of nitriding atmosphere only is by NH
3The pure gas of forming; By NH
3Mixed gas with the RX gas composition; With rare gas element and above-mentioned single NH
3Gas or and NH
3Mix the formed gas that is mixed with rare gas element with the mixed gas of RX gas; Or with H
2Gas mixes with the gas that is mixed with rare gas element and a kind of mixed gas of forming.
4, the method for nitriding nickel alloy according to claim 1, wherein nickelalloy maintenance in nitriding atmosphere under heating condition is carried out under 500 ℃ to 700 ℃ temperature.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24763/92 | 1992-01-14 | ||
JP4024763A JP2501062B2 (en) | 1992-01-14 | 1992-01-14 | Nitriding method of nickel alloy |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1074489A CN1074489A (en) | 1993-07-21 |
CN1032264C true CN1032264C (en) | 1996-07-10 |
Family
ID=12147193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN92102171A Expired - Lifetime CN1032264C (en) | 1992-01-14 | 1992-03-30 | Method of nitriding nickel alloy |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0551702B1 (en) |
JP (1) | JP2501062B2 (en) |
KR (1) | KR100247657B1 (en) |
CN (1) | CN1032264C (en) |
DE (1) | DE69225880T2 (en) |
TW (1) | TW198070B (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5445683A (en) * | 1992-05-13 | 1995-08-29 | Daidousanso Co., Ltd. | Nickel alloy products with their surfaces nitrided and hardened |
US5447181A (en) * | 1993-12-07 | 1995-09-05 | Daido Hoxan Inc. | Loom guide bar blade with its surface nitrided for hardening |
JP2881111B2 (en) * | 1994-06-17 | 1999-04-12 | 大同ほくさん株式会社 | Steel nitriding method |
DE4429943C1 (en) * | 1994-08-24 | 1996-02-22 | Dornier Gmbh Lindauer | Drop wire surface hardening |
SE511082C2 (en) * | 1996-12-20 | 1999-08-02 | Btg Eclepens Sa | coating Sheet |
US6093303A (en) * | 1998-08-12 | 2000-07-25 | Swagelok Company | Low temperature case hardening processes |
US6165597A (en) * | 1998-08-12 | 2000-12-26 | Swagelok Company | Selective case hardening processes at low temperature |
US6547888B1 (en) | 2000-01-28 | 2003-04-15 | Swagelok Company | Modified low temperature case hardening processes |
JP4947932B2 (en) * | 2005-07-26 | 2012-06-06 | エア・ウォーターNv株式会社 | Metal gas nitriding method |
JP4881049B2 (en) * | 2006-04-11 | 2012-02-22 | 新日本製鐵株式会社 | Conductor roll for electroplating |
JP2009197254A (en) * | 2008-02-19 | 2009-09-03 | Osaka Industrial Promotion Organization | SURFACE TREATMENT METHOD FOR DUAL MULTI-PHASE Ni BASED INTERMETALLIC COMPOUND ALLOY, AND SURFACE-TREATED DUAL MULTI-PHASE Ni BASED INTERMETALLIC COMPOUND ALLOY |
JP2010070844A (en) * | 2009-02-24 | 2010-04-02 | Air Water Inc | Method for using heat treatment furnace, method of heat treatment, and heat treatment furnace |
US8377234B2 (en) | 2010-04-26 | 2013-02-19 | King Fahd University Of Petroleum And Minerals | Method of nitriding nickel-chromium-based superalloys |
CN102330062B (en) * | 2011-10-18 | 2013-01-02 | 沈阳大学 | Preparation method of titanium/nickel nitride nano multilayer film |
CN102943231B (en) * | 2012-10-30 | 2015-07-08 | 江苏大学 | Surface three-step nitridation method of aluminium and aluminium alloy |
CN103074574A (en) * | 2012-12-14 | 2013-05-01 | 四川大学 | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece |
DE102013218303A1 (en) * | 2013-09-12 | 2015-03-12 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Exhaust gas turbocharger with turbine |
CN106884134B (en) * | 2015-12-16 | 2020-07-03 | 中国科学院上海应用物理研究所 | Surface passivation treatment method of nickel-based alloy |
CN105944746B (en) * | 2016-05-18 | 2018-09-14 | 中国科学院理化技术研究所 | Carbon-supported nickel nitride catalyst and preparation method and application thereof |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3129124A (en) * | 1959-12-30 | 1964-04-14 | Gen Electric | Process for producing interlaminar insulation for electrical apparatus |
EP0352061B1 (en) * | 1988-07-20 | 1994-09-21 | Hashimoto Chemical Industries Co., Ltd. | Metal material with film passivated by fluorination and apparatus composed of the metal material |
DE69009603T2 (en) * | 1989-07-10 | 1995-01-12 | Daido Oxygen | Process for the pretreatment of metallic workpieces and the nitriding hardening of steel. |
-
1992
- 1992-01-14 JP JP4024763A patent/JP2501062B2/en not_active Expired - Fee Related
- 1992-03-13 EP EP92302169A patent/EP0551702B1/en not_active Expired - Lifetime
- 1992-03-13 DE DE69225880T patent/DE69225880T2/en not_active Expired - Lifetime
- 1992-03-17 KR KR1019920004456A patent/KR100247657B1/en not_active IP Right Cessation
- 1992-03-30 CN CN92102171A patent/CN1032264C/en not_active Expired - Lifetime
- 1992-04-10 TW TW081102766A patent/TW198070B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2501062B2 (en) | 1996-05-29 |
EP0551702A1 (en) | 1993-07-21 |
EP0551702B1 (en) | 1998-06-10 |
KR100247657B1 (en) | 2000-04-01 |
DE69225880D1 (en) | 1998-07-16 |
CN1074489A (en) | 1993-07-21 |
KR930016559A (en) | 1993-08-26 |
TW198070B (en) | 1993-01-11 |
JPH05195193A (en) | 1993-08-03 |
DE69225880T2 (en) | 1998-12-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1032264C (en) | Method of nitriding nickel alloy | |
EP0386386B1 (en) | Process for producing Yttrium enriched aluminide coated superalloys | |
EP0888418B1 (en) | Diffusion coated furnace tubes for the production of ethylene | |
CN1100890C (en) | High-temperature high-strength antioxidant anticorrosive austenite alloy | |
EP0465333B1 (en) | Method and installation for the cementation of metallic alloy articles at low pressure | |
CA1213759A (en) | High temperature metal coating compositions | |
O'Brien et al. | Plasma(Ion) Nitriding | |
US5900102A (en) | Method for repairing a thermal barrier coating | |
CN1044393C (en) | Nikel alloy products with their surfaces nitrided and hardened | |
CN110387523B (en) | Multilayer gradient composite high-temperature oxidation-resistant coating on surface of niobium alloy and preparation method thereof | |
US5252145A (en) | Method of nitriding nickel alloy | |
US5407705A (en) | Method and apparatus for producing aluminide regions on superalloy substrates, and articles produced thereby | |
EP1749114A2 (en) | Improved chromium diffusion coatings | |
US5972429A (en) | Chromium-silicon diffusion coating | |
US5082741A (en) | Thermal spray material and thermal sprayed member using the same | |
US4919157A (en) | Method of cleaning metal components for cathode ray tubes | |
CN114086111B (en) | High-temperature-resistant iridium-hafnium oxide composite material and preparation method thereof | |
US4357182A (en) | Chromization of steels by gas process | |
Srikanth et al. | Failure analysis of inconel 601 radiant tubes in continuous annealing furnace of hot dip galvanizing line | |
US7291229B2 (en) | Method of surface treatment of titanium metal | |
GB2094838A (en) | Protective coating of cold- worked alloy surfaces containing chromium | |
US5032557A (en) | Thermal spray material and and thermal sprayed member using the same | |
JPH0225559A (en) | Nitriding treatment for ti or ti alloy | |
JPH08311633A (en) | Heat-resistant material and its production | |
CN116145069A (en) | Method for preparing Ti-Al intermediate phase layer/pure aluminum carburized layer composite coating on surface of titanium or titanium alloy |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C53 | Correction of patent for invention or patent application | ||
COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: DAIDOUSANSO CO., LTD. TO: AIR AND WATER INC. |
|
CP03 | Change of name, title or address |
Address after: Hokkaido, Sapporo, Japan Patentee after: Air Water Inc. Address before: Osaka City, Osaka of Japan Patentee before: Daidousanso Co., Ltd. |
|
C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
OR01 | Other related matters |