CN107964644A - The composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface - Google Patents
The composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface Download PDFInfo
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- CN107964644A CN107964644A CN201711279370.3A CN201711279370A CN107964644A CN 107964644 A CN107964644 A CN 107964644A CN 201711279370 A CN201711279370 A CN 201711279370A CN 107964644 A CN107964644 A CN 107964644A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 55
- 239000002131 composite material Substances 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 230000007704 transition Effects 0.000 claims abstract description 44
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims abstract description 11
- 238000005728 strengthening Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 229910009043 WC-Co Inorganic materials 0.000 claims description 6
- 238000005474 detonation Methods 0.000 claims description 6
- 238000010285 flame spraying Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 239000002159 nanocrystal Substances 0.000 claims description 3
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 46
- 238000005255 carburizing Methods 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000005121 nitriding Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000005275 alloying Methods 0.000 description 5
- 238000005253 cladding Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010288 cold spraying Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/126—Detonation spraying
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to the composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface, it is divided into surface hard layer, transition zone and titanium alloy substrate three parts, the transition zone is the layer of surface deformation strengthening layer made of the top layer of titanium alloy substrate, the thickness of transition zone is in 0.2 0.4mm, the firmness change from surface to titanium alloy substrate of transition zone is that the hardness of titanium alloy substrate is gradually transitions by more than 900HV, and the firmness change of transition zone is slowly uniform；The surface hard layer is that the thickness of surface hard layer is in 1.5 2.5mm in transition zone hard coat prepared above.The present invention is prepared for composite hardening layer in titanium alloy surface, significantly improves the bearing capacity of titanium alloy substrate by increasing hardness slowly varying ground transition zone.Phenomena such as titanium alloy after Surface hardened layer can work under the load of higher, be not in conquassation, crackle and come off.
Description
Technical field
The present invention relates to the composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface.
Background technology
Titanium alloy is a kind of important structural metal to grow up the 1950s, and titanium alloy is because strong with high ratio
Degree, excellent corrosion resistance, high temperature resistant, good biocompatibility etc., it has also become emerging 26S Proteasome Structure and Function material, but titanium closes
The hardness of gold is low, is usually no more than HV350, surface endurance and abrasion resistance properties are poor.This does not make titanium alloy under many circumstances not
It can meet production application requirement, its application is restricted.The table of titanium alloy can be significantly improved by surface strengthening technology
Surface hardness, after surface peening, hardness may be up to more than HV1000, can obviously improve the wear-resisting of titanium alloy, endurance and resistance to
Corrosive nature, expands the use scope of titanium alloy, improves service life.
At present in terms of titanium alloy surface reinforcing, the method for use mainly has the surfaces nitrided, Carburization Treatment, laser surface strong
Change, prepare the methods of hard coat and making Nano surface.These methods are obtained for difference in terms of titanium alloy surface reinforcing
The research of degree, wherein surfaces nitrided, carburizing is furtherd investigate.Since titanium nitride hardness is high, chemical stability is good, wear-resisting
Damage, excellent anti-corrosion performance, it is surfaces nitrided, by means such as gas nitriding, plasma nitrided and nitride lasers, in titanium alloy
Surface forms the TiN layer of hard, is remarkably improved the case hardness and wearability of titanium alloy.Carburization Treatment and surfaces nitrided tool
There is similar hardening mechanism, by being formed firmly in titanium alloy surface the methods of spark discharge carburizing and plasma glow carburizing
Matter phase, significantly improves case hardness.Laser surface strengthening method, including the methods of laser surface alloying, laser melting coating.Laser
Surface alloying is to make matrix melts by laser irradiation, while alloying element forms hundreds of microns to an one millimeter left sides needed for addition
Right alloying layer, so as to improve material surface performance, and can form metallurgical binding between alloying superficial layer and base material.
Laser melting coating, hard cladding is formed in matrix surface using the laser beam irradiation cladding material of high-energy-density in alloy surface
Layer, such as cladding ceramic coating, the ceramic phase such as including TiN, TiC, Ti5-Si3, significantly improves surface property.Prepare hard coat side
Method includes vapour deposition, spraying method etc..Hard layer is prepared in alloy surface, such as sprays WC-Co, it is hard to improve titanium alloy surface
Degree, improves wear and corrosion behavior.
Any of the above surface reinforcing method, obtains different degrees of research, but the above intensifying method is all logical
Cross and be attached to the hard-surface coating on base material to improve its hardness, cannot under the conditions of high load operation and in terms of mechanical processing
Meet application requirement.The hardened layer that wherein surfaces nitrided, carburizing is formed in alloy surface is than relatively thin.The surface that laser melting coating obtains
General all very coarse, finish is poor, and hardened layer is thin and uneven, is easy to cause cracking, cladding between cladding layer and matrix
Layer is internal also to occur that stomata and crackle, coating poor in processability, and equipment are expensive.It is excessive that surface prepares hard layer such as hardness, and one
As can be more crisp, in shock loading and cross under heavy load easily cracking or come off from matrix.
The failure mechanism of cementation zone under the conditions of high load operation is analyzed, and with reference to the case-carbonizing of carburizing steel
The structure of hardened layer, it is believed that it is due to that titanium alloy body hardness and hardened layer difference in hardness are larger, it is slow without rational hardness
The transition structure of change, excessively soft titanium alloy substrate cannot carry excessive load under excessive load, cause surface hard layer
Destroy.On the other hand, the surface hard layer that prepared by some methods, surface quality is poor, and thickness difference is larger to be added, it is necessary to carry out machinery
Work, also can produce destruction to cementation zone in process.
The case hardness of titanium alloy can be significantly improved by surface strengthening technology, improves bearing capacity, but be directed to
In the case of big load carrying, current titanium alloy surface hardening technique cannot meet practical application request, in shock loading and
Cross under heavy load and pressure break occurs or from matrix obscission.
The content of the invention
Composite hardening layer and preparation side the technical problem to be solved in the present invention is to provide a kind of high-mechanic titanium alloy surface
Method, cannot meet practical application request with the titanium alloy surface hardening technique for solving current, in shock loading and cross heavy load
Under occur pressure break or from matrix obscission the problem of.
For technical problem existing for solution, the technical solution adopted by the present invention is：A kind of high-mechanic titanium alloy surface is answered
Hardened layer is closed, is divided into surface hard layer, transition zone and titanium alloy substrate three parts, the transition zone is by titanium alloy substrate
Layer of surface deformation strengthening layer made of top layer, the thickness of transition zone in 0.2-0.4mm, transition zone from surface to titanium alloy-based
The firmness change of body is that the hardness of titanium alloy substrate is gradually transitions by more than 900HV, and the firmness change of transition zone is slowly uniform；
The surface hard layer is that the thickness of surface hard layer is in 1.5-2.5mm in transition zone hard coat prepared above.
A kind of form disclosed in transition zone of the present invention is to use making Nano surface intensifying method, in titanium alloy substrate
Top layer forms the crystal grain layer of one layer of nanoscale, and the chemical composition of nanocrystal is identical with the chemical composition of titanium alloy substrate, receives
There is no obvious combination interface between the metal of rice crystal grain layer and titanium alloy substrate, the hardness transition with gradual change.
Another form disclosed in transition zone of the present invention is the nitriding prepared using the method for carburizing or nitriding
Or carburizing transition zone.
Surface hard layer of the present invention is the WC-Co hard coats prepared by the method for detonation flame spraying.
The present invention first prepares transition zone in titanium alloy surface, the method for then preparing hard layer in transition layer surface.Transition
The preparation method of hardened layer, can use making Nano surface, it is surfaces nitrided or carbonization the methods of.The present invention uses complex intensifying skill
Art, realizes the continuous gradation transition of titanium alloy substrate surface depletion layer hardness, improves the bearing capacity of surface depletion layer, Neng Gou
Situations such as continuously working long hours under big load, there is no pressure break and coming off.
Beneficial effect：
It is of the invention compared with existing best technique, the advantage of the invention is that：
1. the present invention is prepared for composite hardening layer in titanium alloy surface, significantly carries by increasing hardness slowly varying ground transition zone
The high bearing capacity of titanium alloy substrate.Titanium alloy after Surface hardened layer can work under the load of higher, will not
Phenomena such as there is conquassation, crackle and coming off.
2. the present invention is prepared for WC-Co hard coats using detonation flame spraying method, by detonation flame spraying method, significantly improve
Combination power between coating and matrix, ensure that processing and the working performance of coating.
Brief description of the drawings
Fig. 1 are titanium alloy（TC4）The composition structure diagram of cementation zone, in figure, including surface hard layer 1, transition
Layer 2, titanium alloy substrate 3；
Fig. 2 are titanium alloy after Surface Nanocrystalline（TC4）Surface hardness changes.
Embodiment
With reference to embodiment, the present invention is described further.
As shown in Figure 1, the composition structure diagram of the composite hardening layer for high-mechanic titanium alloy surface, including alloy
（TC4）Matrix 3, hardness transition zone 2,1 three parts of surface hard layer.
Transition zone 2 is by Surface Nanocrystalline method, in making Nano surface prepared by the surface of titanium alloy substrate 3
Hardness transition zone, transition region thickness are gradually transitions titanium alloy substrate in 0.2-0.4mm, case hardness change from 900HV or so
Hardness, the slow even variation of hardness.
Transition zone 2 is using surface high-speed shot blasting gross distortion method, and the crystalline substance of one layer of nanoscale is formed in alloy surface
Granulosa.The chemical composition of nanocrystal remains unchanged, and scantling change is small, while does not have between nanocrystalline granulosa and parent metal
Obvious combination interface, is tightly combined, not easily to fall off, can greatly improve the surface strength of block materials.Making Nano surface can be with
The areal deformation strengthening layer more than 0.1mm is prepared, strengthening layer hardness transition is slowly uniform, as shown in Figure 2.The side of making Nano surface
Hardened layer prepared by method is good with stability inferior at 750 DEG C, can subsequently pass through the side of thermal spraying, cold spraying or detonation flame spraying
Method, prepares the hard coat that obdurability matches, such as WC-Co coatings.
Surface hard layer 1 is the WC-Co hard coats prepared on 2 surface of transition zone by detonation flame spraying method, and coating is hard
Spend in 950HV or so, coating layer thickness is in 1.5-2.5mm.
Transition zone 2 can also use the side of carburizing or nitriding in addition to method for making Nano surface can be used to be formed
Method prepares transition zone.The transition zone prepared using carburizing and nitriding method, when prepared by follow-up surface hard layer 3, it is necessary to
Control surface temperature, prevents nitriding or carburized layer from failing.
For the present invention by experiment, and have been developed that sample, effect is highly desirable, consistent with the expection of design.
Claims (3)
1. a kind of composite hardening layer of high-mechanic titanium alloy surface, is divided into surface hard layer（1）, transition zone（2）With it is titanium alloy-based
Body（3）Three parts, it is characterised in that：
The transition zone（2）It is by titanium alloy substrate（3）Top layer made of layer of surface deformation strengthening layer, transition zone（2）
Thickness in 0.2-0.4mm, transition zone（2）From surface to titanium alloy substrate（3）Firmness change be gradual by more than 900HV
It is transitioned into titanium alloy substrate（3）Hardness, transition zone（2）Firmness change it is slowly uniform；
The surface hard layer（1）It is in transition zone hard coat prepared above, surface hard layer（1）Thickness in 1.5-
2.5mm。
2. composite hardening layer according to claim 1, it is characterised in that：The transition zone（2）It is one layer of nanoscale
Crystal grain layer, the chemical composition and titanium alloy substrate of nanocrystal（3）Chemical composition it is identical, nanocrystalline granulosa and titanium alloy-based
Body（3）Metal between there is no obvious combination interface.
3. the preparation method of composite hardening layer according to claim 1, it is characterised in that：The surface hard layer（1）
It is the WC-Co hard coats prepared by the method for detonation flame spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279370.3A CN107964644A (en) | 2017-12-06 | 2017-12-06 | The composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711279370.3A CN107964644A (en) | 2017-12-06 | 2017-12-06 | The composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface |
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| CN107964644A true CN107964644A (en) | 2018-04-27 |
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| CN201711279370.3A Pending CN107964644A (en) | 2017-12-06 | 2017-12-06 | The composite hardening layer and preparation method of a kind of high-mechanic titanium alloy surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120251427A (en) * | 2025-06-04 | 2025-07-04 | 东方电气集团东方电机有限公司 | A sealing structure of a water turbine nozzle and a manufacturing method thereof |
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| US20140178637A1 (en) * | 2012-12-21 | 2014-06-26 | Exxonmobil Research And Engineering Company | Low friction coatings with improved abrasion and wear properties and methods of making |
| CN104264098A (en) * | 2014-09-15 | 2015-01-07 | 广东新劲刚新材料科技股份有限公司 | Preparation method of explosion spraying tungsten carbide wear-resistant coating |
| CN106480399A (en) * | 2016-12-13 | 2017-03-08 | 南京工程学院 | A kind of method for preparing gradient nano structure nitration case in titanium alloy surface |
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2017
- 2017-12-06 CN CN201711279370.3A patent/CN107964644A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140178637A1 (en) * | 2012-12-21 | 2014-06-26 | Exxonmobil Research And Engineering Company | Low friction coatings with improved abrasion and wear properties and methods of making |
| CN103334106A (en) * | 2013-05-21 | 2013-10-02 | 中国船舶重工集团公司第七二五研究所 | Surface-hardening treatment method of sealing pairs and friction pairs of titanium and titanium alloy ball valves |
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| CN106480399A (en) * | 2016-12-13 | 2017-03-08 | 南京工程学院 | A kind of method for preparing gradient nano structure nitration case in titanium alloy surface |
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| CN120251427A (en) * | 2025-06-04 | 2025-07-04 | 东方电气集团东方电机有限公司 | A sealing structure of a water turbine nozzle and a manufacturing method thereof |
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