CN108239739A - Positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the application of nickel-base alloy - Google Patents
Positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the application of nickel-base alloy Download PDFInfo
- Publication number
- CN108239739A CN108239739A CN201611219390.7A CN201611219390A CN108239739A CN 108239739 A CN108239739 A CN 108239739A CN 201611219390 A CN201611219390 A CN 201611219390A CN 108239739 A CN108239739 A CN 108239739A
- Authority
- CN
- China
- Prior art keywords
- aluminising
- nickel
- base alloy
- superalloy substrate
- atmosphere
- 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.)
- Pending
Links
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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the applications of a kind of nickel-base alloy.The aluminising intensifying method includes：Superalloy Substrate of at least local surfaces covered with aluminizing medium is placed in protective atmosphere; and carry out aluminising processing at 900~1100 DEG C; and the protective atmosphere is made to remain normal pressure in aluminising processing procedure, wherein by controlling the process conditions such as aluminising temperature, aluminising time that can obtain the surface metallurgic combination Ni Al strengthening layers of high rigidity, abrasion resistant and corrosion resistant performance.The method of the present invention has completely cut off the influence to aluminized coating such as oxygen, significantly improve aluminising rate and aluminized coating quality, it can ensure the corrosion-resistant and oxidation resistent susceptibility of aluminized coating, and this method is small to the appearance and size limitation of workpiece, the nickel-base alloy surface peening layer with characteristics such as high rigidity, abrasion resistant and corrosion resistants can be obtained, it effectively realizes the surfacecti proteon to nickel-base alloy, and substantially the performance of Superalloy Substrate will not be caused to damage.
Description
Technical field
The present invention relates to a kind of positive atmosphere aluminising intensifying method of nickel-base alloy more particularly to a kind of nickel-base alloy just
Calm the anger the Surface thermo-chemical treatment reinforcement technique of atmosphere aluminising, nickel-base alloy workpiece and its apply, belong to material surface protective treatment
Technical field.
Background technology
Nickel-base alloy refers to using nickel as matrix there is the alloy of the comprehensive performances such as certain elevated temperature strength, can according to performance
It is divided into heat-resisting alloy, corrosion resistant alloy, antifriction alloy, Precise Alloy and marmem etc..In a variety of nickel-base alloys,
400 alloys of Monel are the abros that a kind of dosage is big, purposes is wide, comprehensive performance is splendid, in heat exchanger peculiar to vessel, seawater
Desalting plant, salt production equipment, ocean and chemical process equipment, propeller shaft and water pump, gasoline and water tank etc. relate to sea equipment and
Part field is applied widely.But work in 400 parts of Monel in Seawater simultaneously by corrosion with
The destruction of abrasion generates corrosive wear and mutually promotes, thus exacerbates the corrosive wear failure of parts.Therefore, with surface
Reinforcement technique carries out surface treatment reinforcing to abros, such as monel 400, can improve the military service performance of material.
Aluminizing technology, especially solid entrapping aluminising are a kind of surface strengthening technologies of comparative maturity.The technology utilizes gold
Category High temperature diffusion enters workpiece surface and forms rich aluminium layer, so as to change the chemical composition of workpiece surface, tissue and performance.But
Aluminising hinders the progress of aluminising there are the problems such as aluminizing medium and oxidation on metal surface under atmospheric environment, while can reduce aluminising
Quality.
How the influence to aluminized coating such as starvation, improve aluminising rate and aluminized coating quality, ensure the resistance to of aluminized coating
Corrosion and oxidation resistent susceptibility, be nickel-base alloy surface strengthening technology in key technical problem and nickel urgently to be resolved hurrily at present
The priority research areas of based alloy surface peening engineer application.
Invention content
It is a primary object of the present invention to provide a kind of positive atmosphere aluminising intensifying method of nickel-base alloy, nickel-base alloy work
Part and application, to overcome deficiency of the prior art.
To realize aforementioned invention purpose, the technical solution adopted by the present invention includes：
An embodiment of the present invention provides a kind of positive atmosphere aluminising intensifying method of nickel-base alloy, including：
Superalloy Substrate of at least local surfaces covered with aluminizing medium is placed in protective atmosphere, and 900~
1100 DEG C of progress aluminising processing, and the protective atmosphere is made to remain normal pressure in aluminising processing procedure.
In some more preferred embodiment, the aluminizing medium includes：10~40wt% aluminium powders, 1~10wt%
NH4Cl, rest part include Al2O3。
Preferably, the aluminizing medium is solid powder.
In some more preferred embodiment, the aluminising intensifying method includes：Make institute in aluminising processing procedure
The pressure for stating protective atmosphere remains 0.03~0.05MPa.
Preferably, the protective atmosphere is selected from inert gas atmosphere.
In some more preferred embodiment, the aluminising intensifying method includes：
Superalloy Substrate is completely covered, then carry out vacuum drying treatment with aluminizing medium,
Later, it will be covered in the Superalloy Substrate merging vacuum drying oven of aluminizing medium, then vacuum drying oven bore seal is taken out very
Sky is to 1*10-3~1*10-2Pa is heated to 200~300 DEG C later, and is passed through protective gas and forms protective atmosphere, with subsequent
It is continuous to be warming up to 900~1100 DEG C of progress aluminising processing.
More specifically, the aluminising intensifying method further includes：Aluminizing medium and Superalloy Substrate are placed in container, and
Make aluminizing medium that Superalloy Substrate be completely covered, then make aluminizing medium closely knit at least through mode of oscillation, it is later that the container is close
Envelope and progress vacuum drying treatment.
Preferably, the temperature of the vacuum drying treatment is 100~150 DEG C, time 1-3h.
In some more preferred embodiment, the time of the aluminising processing is 4~12h.
In some more preferred embodiment, the aluminising intensifying method includes：Choose surface-brightening and non-oxidation
The Superalloy Substrate of layer, and the Superalloy Substrate is cleaned by ultrasonic, the nickel is covered with the aluminizing medium later
Based alloy matrix.Preferably, cleaning agent includes ethyl alcohol or acetone, and without being limited thereto used by the ultrasonic cleaning processing.
More preferably, the aluminising intensifying method further includes：In the aluminising after treatment, by the nickel-base alloy
Matrix continues to remain in protective atmosphere and is cooled to 150 DEG C hereinafter, taking out later, and clear up Superalloy Substrate surface
Attachment, it is once purged, it is dried at 60~80 DEG C.
The embodiment of the present invention is additionally provided through the processed nickel-base alloy workpiece of preceding method.
Preferably, the nickel-base alloy workpiece includes Superalloy Substrate and is formed in the Superalloy Substrate surface
Ni-Al strengthening layers are metallurgical binding between the Ni-Al strengthening layers and Superalloy Substrate.
It is further preferred that the thickness of the Ni-Al strengthening layers is 80~100 μm.
The embodiment of the present invention additionally provides application of the preceding method in nickel-base alloy surface peening field.
Compared with prior art, advantages of the present invention at least that：
(1) the positive atmosphere aluminising intensifying method of nickel-base alloy provided by the invention, has completely cut off oxygen etc. to aluminized coating
It influences, hence it is evident that improve aluminising rate and aluminized coating quality, ensure the corrosion-resistant and oxidation resistent susceptibility of aluminized coating；
(2) the positive atmosphere aluminising intensifying method of nickel-base alloy provided by the invention has simple for process, and equipment cost is low,
Easy to operate, aluminized coating quality is high, and the advantages such as yield rate height, this is to ensureing that the various performances of alloy are very important；
(3) the positive atmosphere aluminising intensifying method of nickel-base alloy provided by the invention, it is small to the appearance and size limitation of workpiece,
The surface peening that the conventional reinforcement technique such as large scale, abnormity, endoporus is difficult to realize exemplar can be prepared；
(4) present invention realizes the surface peening of nickel-base alloy by positive atmosphere aluminising processing, obtains with high hard
The nickel-base alloy surface peening layer of the characteristics such as degree, abrasion resistant and corrosion resistant can effectively realize the surfacecti proteon to nickel-base alloy, and base
Originally the performance of Superalloy Substrate will not be caused to damage.
Description of the drawings
Fig. 1 show the XRD spectrum of 1 nickel-base alloy alitizing strengthening layer of the embodiment of the present invention；
Fig. 2 a- Fig. 2 b show the microscopic structure and phase that layer cross section is strengthened in 1 nickel-base alloy alitizing of the embodiment of the present invention
The energy spectral line scanning figure answered；
Fig. 3 show 1 Superalloy Substrate of the embodiment of the present invention and aluminising rear surface firmness change figure；
Fig. 4 show the polarization curve after 1 Superalloy Substrate of the embodiment of the present invention and aluminising；
Fig. 5 show the open circuit potential under 1 Superalloy Substrate of the embodiment of the present invention and aluminising sample corrosive wear environment
Variation；
Fig. 6 show the wear extent comparison diagram of 1 Superalloy Substrate of the embodiment of the present invention and aluminising sample.
Specific embodiment
In view of deficiency of the prior art, inventor is able to propose the present invention's through studying for a long period of time and largely putting into practice
Technical solution.The technical solution, its implementation process and principle etc. will be further explained as follows.
The one side of the embodiment of the present invention provides a kind of aluminising strengthening layer of nickel-base alloy, mainly passes through positive atmosphere
Aluminizing technology forms Ni-Al strengthening layers on nickel-base alloy surface, is metallurgical binding with Superalloy Substrate, and with high hard
The characteristics such as degree, abrasion resistant and corrosion resistant.
Among some more preferred embodiment, the thickness of the Ni-Al strengthening layers can be of about 100 μm, to meet
Wear-and corrosion-resistant demand.
Another aspect of the present invention provides a kind of positive atmosphere of aluminising strengthening layer for preparing the nickel-base alloy and oozes
The technology of preparing of aluminium layer mainly using pack aluminizing technology, ensures infiltration rate and aluminising with positive atmosphere protection technique
Layer quality obtains certain thickness aluminized coating, so as to be formed on nickel-base alloy surface by regulating and controlling aluminising temperature and aluminising time
The Ni-Al metallurgical bonding layers of high rigidity, abrasion resistant and corrosion resistant performance.
A kind of positive atmosphere aluminising intensifying method for nickel-base alloy that the one side of the embodiment of the present invention provides includes：
Superalloy Substrate of at least local surfaces covered with aluminizing medium is placed in protective atmosphere, and 900~
1100 DEG C of progress aluminising processing, and the protective atmosphere is made to remain normal pressure in aluminising processing procedure.
In some more preferred embodiment, the aluminizing medium includes：10~40wt% aluminium powders, 1~10wt%
NH4Cl, rest part include Al2O3。
Further, the aluminizing medium is solid powder.
Preferably, the grain size of the aluminium powder is 200~300 mesh.
Preferably, the Al2O3Grain size be 150~200 mesh.
Preferably, the preparation method of the aluminizing medium includes：According to the composition of the aluminizing medium, aluminium powder, NH are taken4Cl and
Al2O3It mixes and carries out ball-milling treatment, it is for use after mixing.Wherein, drum's speed of rotation is 100~200r/min, and Ball-milling Time is
5~20h.
In some more preferred embodiment, the aluminising intensifying method includes：Make institute in aluminising processing procedure
The pressure for stating protective atmosphere remains 0.03~0.05MPa.
Preferably, the protective atmosphere is selected from inert gas atmosphere, such as Ar atmosphere.
In some more preferred embodiment, the aluminising intensifying method includes：
Superalloy Substrate is completely covered, then carry out vacuum drying treatment with aluminizing medium,
Later, it will be covered in the Superalloy Substrate merging vacuum drying oven of aluminizing medium, then vacuum drying oven bore seal is taken out very
Sky is to 1*10-3~1*10-2Pa is heated to 200~300 DEG C later, and is passed through protective gas and forms protective atmosphere, with subsequent
It is continuous to be warming up to 900~1100 DEG C of progress aluminising processing.
In some more specifically embodiment, the aluminising intensifying method further includes：By aluminizing medium and nickel-base alloy
Matrix is placed in container, and makes aluminizing medium that Superalloy Substrate be completely covered, then make aluminizing medium closely knit at least through mode of oscillation,
The container is sealed later and carries out vacuum drying treatment.
Preferably, the temperature of the vacuum drying treatment is 100~150 DEG C, time 1-3h.
In some more preferred embodiment, the time of the aluminising processing is 4~12h.
In some more preferred embodiment, the aluminising intensifying method includes：Choose surface-brightening and non-oxidation
The Superalloy Substrate of layer such as monel400 alloys, and is cleaned by ultrasonic the Superalloy Substrate, to remove surface oil
Fat etc. covers the Superalloy Substrate with the aluminizing medium later.Preferably, the cleaning used by being cleaned by ultrasonic processing
Agent includes ethyl alcohol or acetone, and without being limited thereto.
More preferably, the aluminising intensifying method further includes：In the aluminising after treatment, by the nickel-base alloy
Matrix continues to remain in protective atmosphere and is cooled to 150 DEG C hereinafter, taking out later, and clear up Superalloy Substrate surface
Attachment, it is once purged, it is dried at 60~80 DEG C.
Among some more typical embodiments, the positive atmosphere aluminising intensifying method of the nickel-base alloy can include
Following steps：
(1) it is cleaned by ultrasonic Superalloy Substrate：Prepare pending nickel-base alloy exemplar, surface-brightening, non-oxidation layer, then
Surface grease etc. is removed using exemplar is cleaned by ultrasonic, cleaning agent is respectively ethyl alcohol, acetone；
(2) aluminizing medium is prepared：The weight percent of wherein aluminizing medium is：10-40% aluminium powders, 1-10%NH4Cl urges aluminising
Agent, surplus Al2O3, wherein the grain size of aluminium powder be 200-300 mesh, Al2O3Grain size for 150-200 mesh, urge aluminizing medium as white
Powder；
(3) by prepared powder aluminizing medium be put into ball mill mix, select technique for：Ball-milling Time 5-20h, rotating speed
100-200r/min, it is for use after mixing；
(4) high temperature positive atmosphere aluminising：Select pack aluminizing under the conditions of inert atmosphere protection, first aluminizing medium and
Superalloy Substrate mixing is packed into crucible, and aluminizing medium needs that Superalloy Substrate is completely covered, and gently shaking crucible makes aluminizing medium
It is closely knit, then with fire clay sealed crucible mouth, the crucible being sealed is put into vacuum drying chamber at 100 DEG C dry 2h；
(5) crucible after drying is put into vacuum drying oven, then sealing is evacuated to 1*10-2It is begun to warm up after Pa, is warming up to 200
The argon gas of 0.03MPa is passed through after DEG C as protective gas, continues thereafter with and is warming up to (900-1100 DEG C) beginning aluminising of set temperature,
Argon gas is controlled to keep the normal pressure of 0.03MPa during aluminising, aluminising is promoted to be smoothed out, while prevent oxygen etc. pair in air
The influence of aluminized coating quality, aluminising time are 4-12h；
(6) after aluminising, continue logical argon gas and be cooled to 150 DEG C hereinafter, taking out the Superalloy Substrate after aluminising；
(7) after the Superalloy Substrate after aluminising is taken out, and the attachment on Superalloy Substrate surface is cleared up, then certainly
Water is rinsed well, finally in 60-80 DEG C of drying in oven.
The other side of the embodiment of the present invention is additionally provided through the processed nickel-base alloy workpiece of preceding method.
Preferably, the nickel-base alloy workpiece includes Superalloy Substrate and is formed in the Superalloy Substrate surface
Ni-Al strengthening layers are metallurgical binding between the Ni-Al strengthening layers and Superalloy Substrate.
Preferably, the thickness of the Ni-Al strengthening layers is 80~100 μm.
The wear-and corrosion-resistant demand of nickel-base alloy can be met by the Ni-Al strengthening layers, make its hardness, wearability, resist
Corrosive nature is superior to original nickel-base alloy, has the characteristics such as high rigidity, abrasion resistant and corrosion resistant, can effectively realize to nickel-base alloy
Surfacecti proteon, and substantially the performance of Superalloy Substrate will not be caused to damage.
The embodiment of the present invention additionally provides the positive atmosphere aluminising intensifying method of aforementioned nickel-base alloy in nickel-base alloy surface
The application in reinforcing field.
In addition, by technical scheme of the present invention, the surface that nickel-base alloy is realized by positive atmosphere aluminising processing is strong
Change, obtain the nickel-base alloy surface peening layer with characteristics such as high rigidity, abrasion resistant and corrosion resistants, can effectively realize to Ni-based conjunction
The surfacecti proteon of gold, and substantially the performance of Superalloy Substrate will not be caused to damage.
Technical scheme of the present invention is further described below by way of several embodiments.However, selected embodiment is only
For illustrating the present invention, and do not limit the scope of the invention.
Embodiment 1：
The Ni-Al strengthening layers on the present embodiment nickel-base alloy surface are 87 μm of fine and close Ni by thickness2Al3Coating is formed, and is oozed
Aluminium strengthening layer is metallurgical bonding layer, and hardness improves 4 times compared to nickel-base alloy, and wearability improves 1.7 times, and corrosion resistance improves
1.8 times.Fig. 1-Fig. 6 is the performance parameter figure and and Superalloy Substrate of the nickel-base alloy alitizing strengthening layer of the present embodiment
Performance comparison figure.
The positive atmosphere aluminising intensifying method of the nickel-base alloy surface Ni-Al strengthening layers can follow the steps below：
(1) it is cleaned by ultrasonic Superalloy Substrate, prepares pending nickel-base alloy exemplar, surface-brightening, non-oxidation layer, then
Surface grease etc. is removed using exemplar is cleaned by ultrasonic, cleaning agent is respectively ethyl alcohol, acetone；
(2) aluminizing medium is prepared, the weight percent of wherein aluminizing medium is：20% aluminium powder, 4%NH4Cl urges aluminizing medium, surplus
For Al2O3, wherein the grain size of aluminium powder be 200-300 mesh, Al2O3Grain size for 150-200 mesh, it is white powder to urge aluminizing medium；
(3) by prepared aluminizing medium powder be put into ball mill mix, select technique for：Ball-milling Time 10h, rotating speed
200r/m, it is for use after mixing；
(4) high temperature positive atmosphere aluminising selects pack aluminizing under the conditions of atmosphere protection, first aluminizing medium and workpiece
Mixing is packed into crucible, and aluminizing medium needs that exemplar is completely covered, and gently shaking crucible makes aluminizing medium closely knit, is then sealed with fire clay
The crucible being sealed is put into vacuum drying chamber at 100 DEG C dry 2h by mouth of pot；
(5) crucible after drying is put into vacuum drying oven by high temperature positive atmosphere aluminising, and then sealing is evacuated to 1*10-2After Pa
It begins to warm up, is warming up to the argon gas that 0.03MPa is passed through after 200 DEG C as protective gas, continues thereafter with and be warming up to set temperature
(900 DEG C) beginning aluminisings, control argon gas to keep the normal pressure of 0.03MPa, aluminising are promoted to be smoothed out, prevent simultaneously during aluminising
The only influence to aluminized coating quality such as oxygen in air, aluminising time are 4h；
(6) after aluminising, continue logical argon gas and be cooled to 150 DEG C hereinafter, again taking out sample；
(7) after the sample after aluminising is taken out, specimen surface attachment is cleared up, then tap water is rinsed well, is finally existed
80 DEG C of drying in oven.After treatment obtains nickel-base alloy alitizing strengthening layer, and aluminising layer thickness is 87 μm, hardness phase
4 times are improved than nickel-base alloy, wearability improves 1.7 times, and corrosion resistance improves 1.8 times.
Embodiment 2：
The Ni-Al strengthening layers on the present embodiment nickel-base alloy surface are made of thickness 98 μm of fine and close Ni2Al3 coatings,
Aluminized coating is metallurgical bonding layer, and hardness improves 4.3 times compared to nickel-base alloy, and wearability improves 1.5 times, and corrosion resistance improves
2 times.
The positive atmosphere aluminising intensifying method of the nickel-base alloy surface Ni-Al strengthening layers follows the steps below：
(1) it is cleaned by ultrasonic Superalloy Substrate, prepares pending nickel-base alloy exemplar, surface-brightening, non-oxidation layer, then
Surface grease etc. is removed using exemplar is cleaned by ultrasonic, cleaning agent is respectively ethyl alcohol, acetone；
(2) aluminizing medium is prepared, the weight percent of wherein aluminizing medium is：20% aluminium powder, 4%NH4Cl urge aluminizing medium, surplus
For Al2O3, wherein the grain size of aluminium powder be 200-300 mesh, Al2O3Grain size for 150-200 mesh, it is white powder to urge aluminizing medium；
(3) by prepared powder be put into ball mill mix, select technique for：Ball-milling Time 10h, rotating speed 200r/m are mixed
It is for use after getting togather；
(4) high temperature positive atmosphere aluminising selects pack aluminizing under the conditions of atmosphere protection, first aluminizing medium and workpiece
Mixing is packed into crucible, and aluminizing medium needs that exemplar is completely covered, and gently shaking crucible makes aluminizing medium closely knit, is then sealed with fire clay
The crucible being sealed is put into vacuum drying chamber at 100 DEG C dry 2h by mouth of pot；
(5) crucible after drying is put into vacuum drying oven by high temperature positive atmosphere aluminising, after then sealing is evacuated to 1*10-2Pa
It begins to warm up, is warming up to the argon gas that 0.03MPa is passed through after 200 DEG C as protective gas, continues thereafter with and be warming up to set temperature
(900 DEG C) beginning aluminisings, control argon gas to keep the normal pressure of 0.03MPa, aluminising are promoted to be smoothed out, prevent simultaneously during aluminising
The only influence to aluminized coating quality such as oxygen in air, aluminising time are 6h；
(6) after aluminising, continue logical argon gas and be cooled to 150 DEG C hereinafter, again taking out sample；
(7) after the sample after aluminising is taken out, specimen surface attachment is cleared up, then tap water is rinsed well, is finally existed
80 DEG C of drying in oven.After treatment obtains Ni-based Alloy Aluminization strengthening layer, and aluminising layer thickness is 98 μm, and hardness compares nickel
Based alloy improves 4.3 times, and wearability improves 1.5 times, and corrosion resistance improves 2 times.
Comparative example：
Nickel-base alloy aluminising under atmospheric environment in this comparative example, obstructed argon gas do not apply positive pressure, alumetizing process
Fail to detect aluminized coating after the completion.
The nickel-base alloy alitizing method of this comparative example follows the steps below：
(1) it is cleaned by ultrasonic Superalloy Substrate, prepares pending nickel-base alloy exemplar, surface-brightening, non-oxidation layer, then
Surface grease etc. is removed using exemplar is cleaned by ultrasonic, cleaning agent is respectively ethyl alcohol, acetone；
(2) aluminizing medium is prepared, the weight percent of wherein aluminizing medium is：20% aluminium powder, 4%NH4Cl urge aluminizing medium, surplus
For Al2O3, wherein the grain size of aluminium powder be 200-300 mesh, Al2O3Grain size for 150-200 mesh, it is white powder to urge aluminizing medium；
(3) by prepared powder be put into ball mill mix, select technique for：Ball-milling Time 10h, rotating speed 200r/m are mixed
It is for use after getting togather；
(4) air atmosphere aluminising selects pack aluminizing under air conditions, and aluminizing medium and workpiece mixing are packed into first
Crucible, aluminizing medium need that exemplar is completely covered, and gently shaking crucible makes aluminizing medium closely knit, then with fire clay sealed crucible mouth,
The crucible being sealed is put into vacuum drying chamber at 100 DEG C dry 2h；
(5) crucible after drying is put into vacuum drying oven, 1h is kept the temperature after being warming up to 200 DEG C, continues thereafter with liter by air atmosphere aluminising
Temperature is to (900 DEG C) beginning aluminisings of set temperature, and obstructed protective gas during aluminising maintains air atmosphere, and the aluminising time is 4h；
(6) after aluminising, 150 DEG C are cooled under air atmosphere hereinafter, again taking out sample；
(7) after the sample after aluminising is taken out, specimen surface attachment is cleared up, then tap water is rinsed well, is finally existed
80 DEG C of drying in oven.After treatment obtains the nickel-base alloy under air atmosphere.Do not find aluminized coating, reason after testing
Aluminizing medium can be aoxidized when may be due to aluminising in air, so being not easy to form aluminized coating.
It should be appreciated that above-described is only some embodiments of the present invention, it is noted that for the common of this field
For technical staff, under the premise of the creation design of the present invention is not departed from, other modification and improvement can also be made, these are all
It belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of positive atmosphere aluminising intensifying method of nickel-base alloy, it is characterised in that including：Will at least local surfaces covered with
The Superalloy Substrate of aluminizing medium is placed in protective atmosphere, and aluminising processing is carried out at 900~1100 DEG C, and handle in aluminising
The protective atmosphere is made to remain normal pressure in the process.
2. the positive atmosphere aluminising intensifying method of nickel-base alloy according to claim 1, it is characterised in that：The aluminizing medium
Comprising：10~40wt% aluminium powders, 1~10wt%NH4Cl, rest part include Al2O3；Preferably, the aluminizing medium is solid powder
End；Preferably, the grain size of the aluminium powder is 200~300 mesh；Preferably, the Al2O3Grain size be 150~200 mesh；It is preferred that
, the preparation method of the aluminizing medium includes：According to the composition of the aluminizing medium, aluminium powder, NH are taken4Cl and Al2O3It mixes and carries out
Ball-milling treatment, drum's speed of rotation are 100~200r/min, and Ball-milling Time is 5~20h.
3. the positive atmosphere aluminising intensifying method of nickel-base alloy according to claim 1, it is characterised in that including：In aluminising
The pressure of the protective atmosphere is made to remain 0.03~0.05MPa in processing procedure；Preferably, the protective atmosphere is selected from
Inert gas atmosphere.
4. the positive atmosphere aluminising intensifying method of nickel-base alloy according to claim 1, it is characterised in that including：
Superalloy Substrate is completely covered, then carry out vacuum drying treatment with aluminizing medium,
Later, it will be covered in the Superalloy Substrate merging vacuum drying oven of aluminizing medium, then vacuum drying oven bore seal is evacuated to
1*10-3~1*10-2Pa is heated to 200~300 DEG C later, and is passed through protective gas and forms protective atmosphere, continues thereafter with liter
Temperature to 900~1100 DEG C progress aluminising processing.
5. the positive atmosphere aluminising intensifying method of nickel-base alloy according to claim 4, it is characterised in that further include：It will ooze
Aluminium agent and Superalloy Substrate are placed in container, and make aluminizing medium that Superalloy Substrate be completely covered, then at least through oscillation side
Formula makes aluminizing medium closely knit, later seals the container and carries out vacuum drying treatment；
Preferably, the temperature of the vacuum drying treatment is 100~150 DEG C, and the time is 1~3h.
6. the positive atmosphere aluminising intensifying method of the nickel-base alloy according to claim 1 or 4, it is characterised in that：It is described to ooze
The time of aluminium processing is 4~12h.
7. the positive atmosphere aluminising intensifying method of the nickel-base alloy according to claim 1 or 4, it is characterised in that including：Choosing
The Superalloy Substrate of surface-brightening and non-oxidation layer is taken, and the Superalloy Substrate is cleaned by ultrasonic, later with institute
It states aluminizing medium and covers the Superalloy Substrate；Preferably, used by the ultrasonic cleaning processing cleaning agent include ethyl alcohol or
Acetone.
8. the positive atmosphere aluminising intensifying method of nickel-base alloy according to claim 1, it is characterised in that further include：Institute
State aluminising after treatment, the Superalloy Substrate is continued to remain in protective atmosphere and be cooled to 150 DEG C hereinafter, it
After take out, and clear up the attachment on Superalloy Substrate surface, it is once purged, dried at 60~80 DEG C.
9. through the processed nickel-base alloy workpiece of any one of claim 1-8 the methods；Preferably, the nickel-base alloy work
Part includes Superalloy Substrate and is formed in the Ni-Al strengthening layers on the Superalloy Substrate surface, the Ni-Al strengthening layers with
It is metallurgical binding between Superalloy Substrate；Preferably, the thickness of the Ni-Al strengthening layers is 80~100 μm.
10. any one of claim 1-8 the methods are in the application in nickel-base alloy surface peening field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219390.7A CN108239739A (en) | 2016-12-26 | 2016-12-26 | Positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the application of nickel-base alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219390.7A CN108239739A (en) | 2016-12-26 | 2016-12-26 | Positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the application of nickel-base alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108239739A true CN108239739A (en) | 2018-07-03 |
Family
ID=62701805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611219390.7A Pending CN108239739A (en) | 2016-12-26 | 2016-12-26 | Positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the application of nickel-base alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108239739A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748359A (en) * | 2010-01-26 | 2010-06-23 | 哈尔滨工业大学 | Preparation method of Ni-based alloy composite board |
-
2016
- 2016-12-26 CN CN201611219390.7A patent/CN108239739A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748359A (en) * | 2010-01-26 | 2010-06-23 | 哈尔滨工业大学 | Preparation method of Ni-based alloy composite board |
Non-Patent Citations (1)
| Title |
|---|
| 李玉春等: "镍基高温合金表面渗铝层的抗氧化行为", 《大庆师范学院学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10092953B2 (en) | Method of controlling the corrosion rate of alloy particles, alloy particle with controlled corrosion rate, and articles comprising the particle | |
| US8973808B2 (en) | Method for making a cellular seal | |
| CN102011121B (en) | Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof | |
| Min et al. | Microstructure, microhardness and corrosion resistance of laser cladding Ni–WC coating on AlSi5Cu1Mg alloy | |
| CN109023226B (en) | Flexible boronizing solid boronizing agent and preparation of single-phase Fe2Method for B boronizing layers | |
| JP2007138934A (en) | Coating substrate forming method and stripping method | |
| CN106637071A (en) | Method for preparing composite coating by adopting multi-stage pack cementation aluminizing in combination with micro-arc oxidation | |
| Wang et al. | High temperature oxidation resistance and microstructure change of aluminized coating on copper substrate | |
| CN108998794B (en) | Re-Si co-modified aluminide coating and preparation method thereof | |
| CN109368635A (en) | A kind of method of diamond surface plating boron doping metal carbides | |
| CN113755916B (en) | In-situ synthesis method of Ni-W-WC composite coating | |
| Allahyarzadeh et al. | Electrodeposition on superalloy substrates: a review | |
| CN105177540B (en) | A kind of diamond composite deposite applied to stone cutter tool | |
| Xiang et al. | Effects of pack composition on the formation of aluminide coatings on alloy steels at 650 C | |
| CN112299882B (en) | In-situ preparation method of HfC-based ternary carbide gradient coating on surface of carbon material | |
| CN108239739A (en) | Positive atmosphere aluminising intensifying method, nickel-base alloy workpiece and the application of nickel-base alloy | |
| CN112323014A (en) | Method for preparing diffusion barrier layer by aluminized silicon-preoxidation | |
| CN112323066B (en) | Preparation method of diffusion barrier layer suitable for large-scale component | |
| JP2011116584A (en) | Method for producing carbon material | |
| EP2392687A1 (en) | Method for manufacturing an oxidation resistant component with improved high temperature strength and corresponding oxidation resistant component with improved high temperature strength | |
| CN110252627B (en) | Preparation method of aluminum liquid corrosion resistant steel surface oxide coating | |
| CN114318202A (en) | Nickel-based alloy surface wear-resistant coating and preparation method thereof | |
| CN111041428A (en) | Method for preparing nano carbide based on EB-PVD (electron beam-physical vapor deposition) to enhance stability of matrix | |
| CN114686804B (en) | Composite coating of oxide dispersion reinforced steel and preparation method thereof | |
| CN114059011B (en) | Low-temperature salt bath chromizing method for 304 stainless steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180703 |