CN108193166A - Titanium alloy surface micro-arc carburization method - Google Patents
Titanium alloy surface micro-arc carburization method Download PDFInfo
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- CN108193166A CN108193166A CN201611143190.8A CN201611143190A CN108193166A CN 108193166 A CN108193166 A CN 108193166A CN 201611143190 A CN201611143190 A CN 201611143190A CN 108193166 A CN108193166 A CN 108193166A
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- titanium alloy
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- carburization
- alloy surface
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—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 solids, e.g. powders, pastes
- C23C8/62—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 solids, e.g. powders, pastes only one element being applied
- C23C8/64—Carburising
-
- 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
- C23C8/04—Treatment of selected surface areas, e.g. using masks
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- 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
The present invention relates to titanium alloy surfaces to strengthen field, specially a kind of titanium alloy surface micro-arc carburization method.It rotates or vibrates with certain speed using graphite pole as anode, by carburized workpiece as cathode, two interpolars apply high-frequency pulse heavy current, form micro-arc spark electric discharge under protection of argon gas.With graphite pole contact discharge region carburizing, carburizing do not occur for relief area, and workpiece is without integrally heat.Micro-arc carburization can be carried out in titanium alloy surface using the present invention, solve the problems, such as that titanium alloy hardness is low, easily generate contact corrosion, wearing no resistance and anti scuffing fatigue behaviour is low, effectively titanium alloy surface can be strengthened using micro-arc carburization.
Description
Technical field
The present invention relates to titanium alloy surfaces to strengthen field, specially a kind of titanium alloy surface micro-arc carburization method.
Background technology
Titanium alloy is divided into alpha titanium alloy, near αtitanium alloy, alpha+beta titanium alloys, beta-titanium alloy, is added in using pure metallic titanium as matrix each
Kind of metal or non-metallic alloying elements, you can the titanium alloy using intermetallic compound or nonmetallic compound as hardening constituent is formed,
With specific strength is high, corrosion resistance is strong, excellent in mechanical performance, higher yield strength and tensile strength under different temperatures and
Specific functions, titanium and the titanium alloys such as shape memory function, superconduction function, hydrogen storage function are in metallurgy, machinery, chemical industry, ship and boat
Empty space industry all obtains extensive use.But the hardness of titanium alloy is relatively low, friction coefficient is high, and wearability is very poor, easily with to mill
Adhesive wear occurs for material, and high temperature and high speed friction is inflammable, causes the wear out failure of part, limits it and further extensively should
With.
Titanium alloy surface is modified the currently used modified material in field and is divided into metal, several major class of ceramics, at common surface
Reason method has：Thermo-chemical treatment, ion implanting, differential arc oxidation, metal plating, chemical plating, vapor deposition, thermal spraying, electronics and
Laser surface alloying and laser cladding, non-balance magnetically controlled sputter plated film, ionic nitriding, nanometer technology etc..
Invention content
Present invention aims at a kind of titanium alloy surface micro-arc carburization method is provided, solve that titanium alloy hardness is low, easy production
Raw contact corrosion wears no resistance and the problem of anti scuffing fatigue behaviour is low.
The technical scheme is that：
A kind of titanium alloy surface micro-arc carburization method, to the micro-arc carburization of titanium alloy surface, micro-arc carburization process refers to：With
Graphite pole is rotated or is vibrated as anode, and by carburized workpiece as cathode, two interpolars apply high-frequency pulse heavy current,
Micro-arc spark electric discharge is formed under protection of argon gas；With graphite pole contact discharge region carburizing, carburizing does not occur for relief area.
The titanium alloy surface micro-arc carburization method, titanium alloy are alpha titanium alloy, near αtitanium alloy, alpha+beta titanium alloys or β titaniums
Alloy.
The titanium alloy surface micro-arc carburization method, high purity graphite pole of the carburizing source for C ＞ 99.5wt%, diameter root
It is selected according to carburized zone size.
The titanium alloy surface micro-arc carburization method, the equipment selected by micro-arc carburization are multi-functional differential of the arc increasing material manufacturing
Machine or ultrasonic wave electric spark overlaying machine, equipped with argon protective device.
The titanium alloy surface micro-arc carburization method, before carburization titanium alloy clean up, the position of surface oxidation
It is removed by the way of sand paper polishing, is dried after wiping titanium alloy surface with acetone later.
The titanium alloy surface micro-arc carburization method during carburizing, carries out micro-arc spark electric discharge, power supply under Ar gas shieldeds
Discharge frequency be 1500~1800Hz, voltage 50V~80V, graphite pole rotate when 1000~1400 revs/min of rotary speed,
Vibration velocity when graphite pole vibrates is 10000~30000 times/second.
The titanium alloy surface micro-arc carburization method, 100~150 μm of carburized layer average thickness are metallurgical junction with base material
It closes, without apparent interface, tissue transition is uniform.
The titanium alloy surface micro-arc carburization method, titanium alloy surface micro-arc carburization process are：(1) workpiece surface is cleared up
→ (2) prepare the graphite pole clamping of graphite pole → (3) on equipment work rifle → (4) workpiece fix → (5) micro-arc carburization.
The titanium alloy surface micro-arc carburization method, graphite pole material are mill pressure graphite, isostatic pressing formed graphite, Gao Chunshi
Ink, carbon graphite sealing, carbon graphite bearing or electric spark graphite.
The design philosophy of the present invention：
The present invention is to a kind of micro-arc carburization intensifying method of titanium alloy surface, and carburizing source is high purity graphite pole, with graphite
Pole is rotated or is vibrated with certain speed as anode, and by carburized workpiece as cathode, two interpolars apply high-frequency pulse forceful electric power
Stream forms micro-arc spark electric discharge under protection of argon gas.With graphite pole contact discharge region carburizing, relief area is not oozed
Carbon, workpiece is without integrally heating.Micro-arc carburization can be carried out in titanium alloy surface using the present invention, solve titanium alloy hardness
It is low, easily lead to the problem of contact corrosion, wear no resistance and anti scuffing fatigue behaviour is low, effectively titanium can be closed using micro-arc carburization
Gold surface is strengthened.
Advantages of the present invention and advantageous effect are：
Titanium alloy have specific strength is high, corrosion resistance is strong, the excellent in mechanical performance under different temperatures, higher yield strength and
The specific functions such as tensile strength and shape memory function, superconduction function, hydrogen storage function.Titanium and titanium alloy metallurgical, machinery,
Chemical industry, ship and aerospace field all obtain extensive use.But the hardness of titanium alloy is relatively low, friction coefficient is high, wearability
It is very poor, easily with to mill material occur adhesive wear, high temperature and high speed friction it is inflammable, cause the wear out failure of part, limit its into
The extensive use of one step.Using titanium alloy surface micro-arc carburization of the present invention, it can realize that titanium alloy surface is strengthened, and with as follows
Feature：
(1) workpiece is without integrally heating, and with graphite pole contact discharge region carburizing, carburizing does not occur for relief area.
(2) carburized layer average thickness is metallurgical binding with base material up to 100~150 μm, without apparent interface, tissue
Transition is uniform.
(3) joint arm Robot actions may be used in micro-arc carburization work rifle, can automatically control, convenient and safe.
Description of the drawings
Fig. 1 is the tissue topography of titanium alloy surface micro-arc carburization layer of the present invention.
Specific embodiment
In specific implementation process, titanium alloy surface micro-arc carburization of the present invention carries out micro-arc carburization to titanium alloy, and the differential of the arc is oozed
Carbon process refers to be rotated or vibrated with certain speed using graphite pole as anode, and by carburized workpiece as cathode, two interpolars are applied
High frequency pulse heavy current forms micro-arc spark electric discharge under protection of argon gas.With graphite pole contact discharge region carburizing,
Carburizing does not occur for relief area, and workpiece is without integrally heating.Carburizing is on-metallic article with graphite pole, and material is mill pressure stone
Ink, isostatic pressing formed graphite, high purity graphite, carbon graphite sealing, carbon graphite bearing, electric spark graphite, high temperature resistant, electric conductivity is good, no
Easy fracture, coefficient of thermal expansion is smaller, and thermal conductivity is big, and resistance to extremely cold very hot property is good, and price is relatively inexpensive.
In the following, the present invention is further elaborated on by embodiment.
Embodiment 1
In the present embodiment, it is to alpha titanium alloy surface by micro-arc carburizing process：(1) graphite pole is cleared up → (2) prepared to workpiece surface
→ (3) graphite pole clamping on equipment work rifle → (4) workpiece fix → (5) micro-arc carburization.Wherein：
(1) titanium alloy cleans up before carburization, and the position of surface oxidation is removed by the way of sand paper polishing, later
It is dried after wiping titanium alloy surface with acetone.
(2) using high purity graphite pole (carbon content is more than 99.5wt%), diameter is selected according to carburized zone size in carburizing source
It selects, length ＜ 80mm, on equipment work rifle.
(3) equipment selected by micro-arc carburization is multi-functional differential of the arc increasing material manufacturing machine or ultrasonic wave electric spark overlaying machine, is matched
There is argon protective device.Graphite pole be anode, with certain speed rotate or vibrate, workpiece is cathode, under Ar gas shieldeds into
Row micro-arc spark discharge, corona discharge frequency be 1600Hz, voltage 60V, graphite pole rotate when 1200 turns of rotary speed/
Point, vibration velocity when graphite pole vibrates is 20000 times/second.
Embodiment the result shows that, carbon of the present invention is reacted with titanium or titanium alloy can form a kind of Stable Carbon with higher hardness
Compound, surface can form hard compound film layer and diffusion layer (Fig. 1), carburized layer average thickness up to 100~150 μm, with
Base material is metallurgical binding, and without apparent interface, tissue transition is uniform.So as to, there is good protective effect to basis material,
Carbide infiltration layer has very high hardness and good wear-resisting property, and hardness reaches HV1200~1500, and wear-resisting property obtains
It significantly improves, the wearability and corrosion resisting property for making material are significantly improved.
Claims (9)
- A kind of 1. titanium alloy surface micro-arc carburization method, which is characterized in that the micro-arc carburization of titanium alloy surface, micro-arc carburization mistake Journey refers to：It is rotated or is vibrated using graphite pole as anode, by carburized workpiece as cathode, two interpolars apply high-frequency arteries and veins Heavy current is rushed, forms micro-arc spark electric discharge under protection of argon gas；With graphite pole contact discharge region carburizing, relief area is not Carburizing occurs.
- 2. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that titanium alloy is alpha titanium alloy, closely Alpha titanium alloy, alpha+beta titanium alloys or beta-titanium alloy.
- 3. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that carburizing source is C ＞ The high purity graphite pole of 99.5wt%, diameter are selected according to carburized zone size.
- 4. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that setting selected by micro-arc carburization Standby is multi-functional differential of the arc increasing material manufacturing machine or ultrasonic wave electric spark overlaying machine, equipped with argon protective device.
- 5. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that titanium alloy is clear before carburization Wash clean, the position of surface oxidation are removed by the way of sand paper polishing, are dried after wiping titanium alloy surface with acetone later.
- 6. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that during carburizing, in Ar gas shieldeds It is lower progress micro-arc spark electric discharge, corona discharge frequency be 1500~1800Hz, voltage 50V~80V, graphite pole rotate when rotation 1000~1400 revs/min of rotary speed, vibration velocity when graphite pole vibrates are 10000~30000 times/second.
- 7. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that carburized layer average thickness 100 ~150 μm, be metallurgical binding with base material, and without apparent interface, tissue transition is uniform.
- 8. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that titanium alloy surface micro-arc carburization Process is：The graphite pole clamping of workpiece surface cleaning → (2) prepare graphite pole → (3) on equipment work rifle → (4) workpiece consolidate Fixed → (5) micro-arc carburization.
- 9. titanium alloy surface micro-arc carburization method described in accordance with the claim 1, which is characterized in that graphite pole material is pressed for mill Graphite, isostatic pressing formed graphite, high purity graphite, carbon graphite sealing, carbon graphite bearing or electric spark graphite.
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| CN201611143190.8A CN108193166A (en) | 2016-12-08 | 2016-12-08 | Titanium alloy surface micro-arc carburization method |
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| CN201611143190.8A CN108193166A (en) | 2016-12-08 | 2016-12-08 | Titanium alloy surface micro-arc carburization method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512170A (en) * | 2019-10-12 | 2019-11-29 | 河海大学常州校区 | A kind of titanium alloy boronizing method |
Citations (3)
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| CN1453387A (en) * | 2003-05-19 | 2003-11-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Surface electrospark discharge method with graphite electrode to reinforce titanium alloy material |
| CN102071385A (en) * | 2009-11-25 | 2011-05-25 | 中国科学院金属研究所 | Controlled directional solidification nickel-base high-temperature alloy recrystallizing method |
| CN102218638A (en) * | 2010-04-14 | 2011-10-19 | 王茂才 | Process method for repairing gas turbine vanes by micro-arc deposition coating |
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Patent Citations (3)
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| CN1453387A (en) * | 2003-05-19 | 2003-11-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Surface electrospark discharge method with graphite electrode to reinforce titanium alloy material |
| CN102071385A (en) * | 2009-11-25 | 2011-05-25 | 中国科学院金属研究所 | Controlled directional solidification nickel-base high-temperature alloy recrystallizing method |
| CN102218638A (en) * | 2010-04-14 | 2011-10-19 | 王茂才 | Process method for repairing gas turbine vanes by micro-arc deposition coating |
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|---|---|---|---|---|
| CN110512170A (en) * | 2019-10-12 | 2019-11-29 | 河海大学常州校区 | A kind of titanium alloy boronizing method |
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