CN104195616A - Micro-arc oxidation treatment method of titanium alloy tubing coupling surface - Google Patents
Micro-arc oxidation treatment method of titanium alloy tubing coupling surface Download PDFInfo
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- CN104195616A CN104195616A CN201410449070.5A CN201410449070A CN104195616A CN 104195616 A CN104195616 A CN 104195616A CN 201410449070 A CN201410449070 A CN 201410449070A CN 104195616 A CN104195616 A CN 104195616A
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- alloy tubing
- electrolytic solution
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Abstract
The invention discloses a micro-arc oxidation treatment method of a titanium alloy tubing coupling surface. The method sequentially comprises the following steps: pickling and removing oil; washing; clamping; carrying out micro-arc oxidation; removing clamping and washing; drying; and detecting. According to the method disclosed by the invention, the titanium alloy tubing coupling is introduced from a common anodized Faraday region to a high voltage discharge region to overcome the defects of hard anodizing, so that the comprehensive performance of a micro-arc oxidation ceramic film layer is greatly improved. The micro-arc oxidation ceramic film layer is firmly combined with a base body, so that the titanium alloy tubing coupling surface is compact in structure and high in toughness, and has good characteristics of wear resistance, corrosion resistance, high temperature impact resistance, electric insulation and the like.
Description
Technical field
The present invention relates to a kind of joint, relate in particular to the differential arc oxidation treatment method on a kind of titanium alloy tubing joint surface.
Background technology
Along with the environment of oil-gas exploration and exploitation becomes increasingly complex, corrosion resistance nature to oil pipe has proposed requirements at the higher level, work-ing life and the Reusability number of times of oil pipe wished to improve in oil field simultaneously, strengthens the anti-stick button performance of joint, ensures structural integrity and the sealing integrity of oil pipe column.The surface treatment quality of box cupling, is to improve the wear resistance of joint and the important factor of anti-stick button, and differential arc oxidation processing can improve the wear resistance of joint greatly, and the anti-stick button that improves joint is had to good effect.
Summary of the invention
The weak point existing for prior art, the object of the present invention is to provide the differential arc oxidation treatment method on a kind of titanium alloy tubing joint surface, improve the over-all properties of Micro-Arc Oxidized Ceramic Coating, Micro-Arc Oxidized Ceramic Coating is combined with matrix firmly, compact structure, toughness is high, has the good characteristic such as wear-resisting, corrosion-resistant, high temperature resistant impact and electrical isolation.
Object of the present invention is achieved through the following technical solutions:
The differential arc oxidation treatment method on titanium alloy tubing joint surface, its treatment process is as follows:
A, pickling degreasing: it is in 5～10% hydrochloric acid soln degreasing tank that titanium alloy tubing joint is placed on to concentration, places 10-20 minute, carries out oil removal treatment;
B, cleaning: the titanium alloy tubing joint after oil removal treatment is placed in clear water rinse bath and is cleaned 5～10 minutes with clear water;
C, clamping: by titanium alloy tubing joint clamping tool, titanium alloy tubing joint is lifted in the electrolytic solution electrolyzer having configured, anode and negative electrode and power supply are connected;
D, differential arc oxidation: the voltage of controlling electrolytic solution electrolyzer continues to be elevated to 320～380V, electric current continues to be elevated to 0.01～0.30A, and the electrolyte temperature of controlling electrolytic solution electrolyzer is 10～90 degree, the acidity-basicity ph value of electrolytic solution liquid is 8～13; Titanium alloy tubing joint clamping step c is placed in electrolytic solution electrolyzer and carries out differential arc oxidation 10～60 minutes, and the thickness that makes titanium alloy tubing joint form Micro-Arc Oxidized Ceramic Coating is 10～15 μ m;
Electrolytic solution in described electrolytic solution electrolyzer select silicate or/and phosphoric acid salt or/and C
6h
5o
7na
32H
2o is or/and borate is made electrolytic solution;
E, lay down clamping and cleaning: lay down the clamping tool of titanium alloy tubing joint, in clear water rinse bath, clean titanium alloy tubing joint 2～5 minutes;
F, drying and processing: titanium alloy tubing joint is put into stoving oven and carry out drying and processing, control the bake out temperature of stoving oven at 80～100 DEG C, the drying and processing time is 5～8 minutes;
H, detection: detect the thicknesses of layers of the outside Micro-Arc Oxidized Ceramic Coating of titanium alloy tubing joint with special film thickness detector, thicknesses of layers is product up to standard at 10～15 μ m, otherwise is substandard products.
The invention provides a kind of optimal technical scheme of steps d, in described steps d, in the time of titanium alloy tubing joint differential arc oxidation, the electrolyte temperature of controlling electrolytic solution electrolyzer is 20～60 degree.
The invention provides a kind of preferred titanium alloy tubing joint technical scheme is: the differential arc oxidation process of described titanium alloy tubing joint is divided into four-stage, as follows respectively:
First stage, anodic oxidation stage: titanium alloy tubing joint surface luster is faded away, and has Bubble formation, the dielectric oxide film of and porous very thin at titanium alloy tubing joint Surface Creation one deck;
Subordinate phase, the spark discharge stage: along with the rising of electrolytic solution bath voltage, titanium alloy tubing joint outside progressively forms Micro-Arc Oxidized Ceramic Coating, then the Micro-Arc Oxidized Ceramic Coating of titanium alloy tubing joint is breakdown, and the surface of titanium alloy tubing joint starts to occur mobile intensive bright sparklet;
Phase III, the micro-arc discharge stage: along with the voltage of electrolytic solution electrolyzer and the increase of titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating, the spark on titanium alloy tubing joint surface becomes greatly gradually, and translational speed slows down relatively, rete ramp;
Fourth stage, the arc discharge stage: along with the oxidization time on titanium alloy tubing joint surface extends, the Micro-Arc Oxidized Ceramic Coating on titanium alloy tubing joint surface reaches certain thickness, puncturing of Micro-Arc Oxidized Ceramic Coating becomes more and more difficult, start the punctation that occurs that minority is larger, these spots no longer move, but are parked in the continuous discharge of a certain fixed position, and with sharp-pointed explosion; Be the Micro-Arc Oxidized Ceramic Coating of 10～15 μ m at the outside formation of titanium alloy tubing joint thickness.
For the setting of electrolytic solution electrolyzer, the preferred structure technology scheme of the present invention is as follows: the cell body of described electrolytic solution electrolyzer selects PP or the manufacture of PVC material to form, and the cell body overcoat of electrolytic solution electrolyzer is reinforced manufacture by stainless material; Cell body inside or outer setting at described electrolytic solution electrolyzer have heat exchange refrigeration system.
Further preferred heat exchange refrigerant system configurations and placement technique scheme thereof are: described heat exchange refrigeration system is cooling liner or cooling apparatus, the cell body inside of described electrolytic solution electrolyzer arranges cooling liner, or has cooling apparatus in the cell body outer setting of electrolytic solution electrolyzer.
In the preferred steps d of the present invention, electrolytic solution electrolyzer arranges technical scheme and is: in described steps d, the cathode material of electrolytic solution electrolyzer selects stainless steel or carbon steel or nickel material manufacture to form.
In order to obtain the better titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating of effect, the preferred technical scheme of the present invention is: between described steps d and step e, there is steps d 1,
Steps d 1, process of refinement: electrophoresis is carried out in the titanium alloy tubing joint with Micro-Arc Oxidized Ceramic Coating that steps d is obtained or/and outside polished finish is down to below 0.18 frictional coefficient of titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating.
The first as steps d of the present invention the side of enforcement is preferably: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 16g/L, (NaPO
3)
6concentration be 14g/L, C
6h
5o
7na
32H
2the concentration of O is 2g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 380V, electric current continues to be elevated to 0.1A, and the differential arc oxidation treatment time is 24～25 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 12 μ m.
The second as steps d of the present invention the side of enforcement is preferably: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 18g/L, (NaPO
3)
6concentration be 12g/L, C
6h
5o
7na
32H
2the concentration of O is 2.5g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 350V, electric current continues to be elevated to 0.15A, and the differential arc oxidation treatment time is 32～37 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 14 μ m.
As the third of steps d of the present invention the side of enforcement be preferably: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 12g/L, (NaPO
3)
6concentration be 16g/L, C
6h
5o
7na
32H
2the concentration of O is 1.5g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 320V, electric current continues to be elevated to 0.05A, and the differential arc oxidation treatment time is 18～22 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 10 μ m.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
The present invention is oxidized titanium alloy tubing joint faraday region by common anode is incorporated into electrion region, has overcome the defect of hard anodizing, has greatly improved the over-all properties of Micro-Arc Oxidized Ceramic Coating; Micro-Arc Oxidized Ceramic Coating is combined with matrix firmly, compact structure, toughness is high, has the good characteristic such as wear-resisting, corrosion-resistant, high temperature resistant impact and electrical isolation.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
Embodiment
As shown in Figure 1, the differential arc oxidation treatment method on a kind of titanium alloy tubing joint surface, its treatment process is as follows:
A, pickling degreasing: it is in 5～10% hydrochloric acid soln degreasing tank that titanium alloy tubing joint is placed on to concentration, places 10-20 minute, carries out oil removal treatment;
B, cleaning: the titanium alloy tubing joint after oil removal treatment is placed in clear water rinse bath and is cleaned 5～10 minutes with clear water;
C, clamping: by titanium alloy tubing joint clamping tool, titanium alloy tubing joint is lifted in the electrolytic solution electrolyzer having configured, anode and negative electrode and power supply are connected;
D, differential arc oxidation: the voltage of controlling electrolytic solution electrolyzer continues to be elevated to 320～380V, electric current continues to be elevated to 0.01～0.30A, and the electrolyte temperature of controlling electrolytic solution electrolyzer is 10～90 degree, the electrolyte temperature that the present embodiment is preferably controlled electrolytic solution electrolyzer is 20～60 degree, and the acidity-basicity ph value of electrolytic solution liquid is 8～13; Titanium alloy tubing joint clamping step c is placed in electrolytic solution electrolyzer and carries out differential arc oxidation 10～60 minutes, and the thickness that makes titanium alloy tubing joint form Micro-Arc Oxidized Ceramic Coating is 10～15 μ m;
Temperature has a certain impact to differential arc oxidation: differential arc oxidation is different from anodic oxidation, and temperature required a wider range is generally 10～90 degree.Temperature is higher, and film forming is faster, but roughness also increases.And temperature is high, can form aqueous vapor.By a large amount of experimental datas, preferably at 20～60 degree.Because differential arc oxidation discharges with heat energy form, so that fluid temperature rises is very fast, must the equipped capacitor larger heat exchange refrigeration system of differential arc oxidation process is with control flume liquid temp.
Time has a certain impact to differential arc oxidation: the differential arc oxidation time, general control was at 10～60min.Oxidization time is longer, and the compactness of film is better, but its roughness also increases.
Electrolytic solution in described electrolytic solution electrolyzer select silicate or/and phosphoric acid salt or/and C
6h
5o
7na
32H
2o is or/and borate is made electrolytic solution; The liquid component of electrolytic solution affects to oxidation: bath composition is the key factor that obtains qualified rete.Electrolytic solution is generally selected and is contained certain metal or nonmetal oxide alkaline salt solution, as silicate, phosphoric acid salt, borate etc.Under identical differential of the arc electrolysis voltage, electrolyte concentration is larger, and film forming speed is just faster, and solution temperature rises slower, otherwise film forming speed is slower, and solution temperature rises very fast.
E, lay down clamping and cleaning: lay down the clamping tool of titanium alloy tubing joint, in clear water rinse bath, clean titanium alloy tubing joint 2～5 minutes;
F, drying and processing: titanium alloy tubing joint is put into stoving oven and carry out drying and processing, control the bake out temperature of stoving oven at 80～100 DEG C, the drying and processing time is 5～8 minutes;
H, detection: detect the thicknesses of layers of the outside Micro-Arc Oxidized Ceramic Coating of titanium alloy tubing joint with special film thickness detector, thicknesses of layers is product up to standard at 10～15 μ m, otherwise is substandard products.
The invention provides a kind of preferred titanium alloy tubing joint technical scheme is: in titanium alloy tubing joint differential arc oxidation process, titanium alloy tubing joint is put into electrolyzer, and after energising, titanium alloy tubing joint surface phenomena and coating growth process have obvious stage.The differential arc oxidation process of described titanium alloy tubing joint is divided into four-stage, as follows respectively:
First stage, anodic oxidation stage: titanium alloy tubing joint surface luster is faded away, and has Bubble formation, the dielectric oxide film of and porous very thin at titanium alloy tubing joint Surface Creation one deck;
Subordinate phase, the spark discharge stage: along with the rising of electrolytic solution bath voltage, titanium alloy tubing joint outside progressively forms Micro-Arc Oxidized Ceramic Coating, then the Micro-Arc Oxidized Ceramic Coating of titanium alloy tubing joint is breakdown, and the surface of titanium alloy tubing joint starts to occur mobile intensive bright sparklet;
Phase III, the micro-arc discharge stage: along with the voltage of electrolytic solution electrolyzer and the increase of titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating, the spark on titanium alloy tubing joint surface becomes greatly gradually, and translational speed slows down relatively, rete ramp;
Fourth stage, the arc discharge stage: along with the oxidization time on titanium alloy tubing joint surface extends, the Micro-Arc Oxidized Ceramic Coating on titanium alloy tubing joint surface reaches certain thickness, puncturing of Micro-Arc Oxidized Ceramic Coating becomes more and more difficult, start the punctation that occurs that minority is larger, these spots no longer move, but are parked in the continuous discharge of a certain fixed position, and with sharp-pointed explosion; Be the Micro-Arc Oxidized Ceramic Coating of 10～15 μ m at the outside formation of titanium alloy tubing joint thickness.
At initial stages of micro arc oxidation, titanium alloy tubing joint surface luster is faded away, and has Bubble formation, generates the dielectric oxide film of the very thin and porous of one deck at coupling surface, and the existence of insulating film is the prerequisite that forms differential arc oxidation.Now voltage, electric current are followed Faraday's law, and this is first stage-anodic oxidation stage.Along with the rising of voltage, oxide film is breakdown, and the surface of titanium alloy tubing joint starts the mobile intensive bright sparklet of appearance, and this is subordinate phase-spark discharge stage.Along with the increase of voltage and rete, the spark on titanium alloy tubing joint surface becomes greatly gradually, and translational speed slows down relatively, rete ramp, and this is phase III-micro-arc discharge stage.Along with oxidization time extends, oxide film reaches certain thickness, and puncturing of rete becomes more and more difficult, start the punctation that occurs that minority is larger, these spots no longer move, but are parked in the continuous discharge of a certain fixed position, and with sharp-pointed explosion, this is fourth stage-arc discharge stage.Before spark discharge, the oxide film of titanium alloy surface is mainly titanium dioxide, and from the spark discharge stage, the element in electrolytic solution starts to generate new compound in the middle of people's rete and with matrix element reaction, thereby has improved the performance of rete.In the micro-arc discharge stage, puncturing of oxide film always occurs in the weak position of rete relative thin, Ji Chuanhou, this position has formed new oxide film, so breakdown point is transferred to again the weak position of next relative thin, therefore, the final oxide film (ceramic membrane) forming is uniform.Three 380V voltages of general employing in the time carrying out differential arc oxidation, cell body can be selected the material such as PP, PVC, and outer casing stainless steel is reinforced.Can additional cooling infrastructure or join cooling liner.Hanger can be selected aluminum alloy material, and cathode material is selected insoluble metallic substance or stainless steel.Oxidation solution notes controlling the potential of hydrogen (PH is generally 8～13) of density, operating voltage, current density, liquid, and the differential arc oxidation time is generally 10～60 minutes (time is longer, and rete is finer and close, but roughness can increase).
For the setting of electrolytic solution electrolyzer, the preferred structure technology scheme of the present invention is as follows: the cell body of described electrolytic solution electrolyzer selects PP or the manufacture of PVC material to form, and the cell body overcoat of electrolytic solution electrolyzer is reinforced manufacture by stainless material; Cell body inside or outer setting at described electrolytic solution electrolyzer have heat exchange refrigeration system.
The preferred heat exchange refrigerant system configurations of the present embodiment and placement technique scheme thereof are: described heat exchange refrigeration system is cooling liner or cooling apparatus, the cell body inside of described electrolytic solution electrolyzer arranges cooling liner, or has cooling apparatus in the cell body outer setting of electrolytic solution electrolyzer.
In the preferred steps d of the present invention, electrolytic solution electrolyzer arranges technical scheme and is: in described steps d, the cathode material of electrolytic solution electrolyzer selects stainless steel or carbon steel or nickel material manufacture to form.
In order to obtain the better titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating of effect, the preferred technical scheme of the present invention is: between described steps d and step e, there is steps d 1,
Steps d 1, process of refinement: electrophoresis is carried out in the titanium alloy tubing joint with Micro-Arc Oxidized Ceramic Coating that steps d is obtained or/and outside polished finish is down to below 0.18 frictional coefficient of titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating.After the differential arc oxidation of steps d, titanium alloy tubing joint workpiece can be processed directly and use without task, also can seal electrophoresis, the subsequent fine thinning processing such as polishing.Utilize differential arc oxidization technique to form arc differential oxide ceramic layer in the growth of titanium alloy tubing joint surface in situ, thickness is about 10～15 μ m, and inner compact layer is outer loose.Wear resisting property significantly improves, and the ceramic layer after polishing also shows good antifriction performance, and frictional coefficient is reduced to 0.18 left and right.
The first as steps d of the present invention the side of enforcement is preferably: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 16g/L, (NaPO
3)
6concentration be 14g/L, C
6h
5o
7na
32H
2the concentration of O is 2g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 380V, electric current continues to be elevated to 0.1A, and the differential arc oxidation treatment time is 24～25 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 12 μ m.The titanium alloy tubing joint that this preferred implementation makes, after titanium alloy tubing sub make-and-break test, titanium alloy tubing joint and outside screw are without thread gluing phenomenon, and the anti-stick button performance of titanium alloy tubing joint is good, and titanium alloy tubing joint rete has met use properties requirement completely.
The second as steps d of the present invention the side of enforcement is preferably: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 18g/L, (NaPO
3)
6concentration be 12g/L, C
6h
5o
7na
32H
2the concentration of O is 2.5g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 350V, electric current continues to be elevated to 0.15A, and the differential arc oxidation treatment time is 32～37 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 14 μ m.The titanium alloy tubing joint that this preferred implementation makes, after titanium alloy tubing sub make-and-break test, titanium alloy tubing joint and outside screw be without thread gluing phenomenon, the anti-stick button better performances of titanium alloy tubing joint, and titanium alloy tubing joint rete has met use properties requirement completely.
As the third of steps d of the present invention the side of enforcement be preferably: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 12g/L, (NaPO
3)
6concentration be 16g/L, C
6h
5o
7na
32H
2the concentration of O is 1.5g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 320V, electric current continues to be elevated to 0.05A, and the differential arc oxidation treatment time is 18～22 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 10 μ m.The titanium alloy tubing joint that this preferred implementation makes, after titanium alloy tubing sub make-and-break test, titanium alloy tubing joint and outside screw be without thread gluing phenomenon, the anti-stick button better performances of titanium alloy tubing joint, and titanium alloy tubing joint rete has met use properties requirement completely.
The titanium alloy tubing sub make-and-break test obtaining through differential arc oxidation treatment method of the present invention, titanium alloy tubing joint and outside screw are without thread gluing phenomenon, and titanium alloy tubing joint rete has met use properties requirement completely.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the differential arc oxidation treatment method on titanium alloy tubing joint surface, is characterized in that: its treatment process is as follows:
A, pickling degreasing: it is in 5～10% hydrochloric acid soln degreasing tank that titanium alloy tubing joint is placed on to concentration, places 10-20 minute, carries out oil removal treatment;
B, cleaning: the titanium alloy tubing joint after oil removal treatment is placed in clear water rinse bath and is cleaned 5～10 minutes with clear water;
C, clamping: by titanium alloy tubing joint clamping tool, titanium alloy tubing joint is lifted in the electrolytic solution electrolyzer having configured, anode and negative electrode and power supply are connected;
D, differential arc oxidation: the voltage of controlling electrolytic solution electrolyzer continues to be elevated to 320～380V, electric current continues to be elevated to 0.01～0.30A, and the electrolyte temperature of controlling electrolytic solution electrolyzer is 10～90 degree, the acidity-basicity ph value of electrolytic solution liquid is 8～13; Titanium alloy tubing joint clamping step c is placed in electrolytic solution electrolyzer and carries out differential arc oxidation 10～60 minutes, and the thickness that makes titanium alloy tubing joint form Micro-Arc Oxidized Ceramic Coating is 10～15 μ m;
Electrolytic solution in described electrolytic solution electrolyzer select silicate or/and phosphoric acid salt or/and C
6h
5o
7na
32H
2o is or/and borate is made electrolytic solution;
E, lay down clamping and cleaning: lay down the clamping tool of titanium alloy tubing joint, in clear water rinse bath, clean titanium alloy tubing joint 2～5 minutes;
F, drying and processing: titanium alloy tubing joint is put into stoving oven and carry out drying and processing, control the bake out temperature of stoving oven at 80～100 DEG C, the drying and processing time is 5～8 minutes;
H, detection: detect the thicknesses of layers of the outside Micro-Arc Oxidized Ceramic Coating of titanium alloy tubing joint with special film thickness detector, thicknesses of layers is product up to standard at 10～15 μ m, otherwise is substandard products.
2. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 1 surface, it is characterized in that: in described steps d, in the time of titanium alloy tubing joint differential arc oxidation, the electrolyte temperature of controlling electrolytic solution electrolyzer is 20～60 degree.
3. according to the differential arc oxidation treatment method on the titanium alloy tubing joint surface described in claim 1 or 2, it is characterized in that: the differential arc oxidation process of described titanium alloy tubing joint is divided into four-stage, as follows respectively:
First stage, anodic oxidation stage: titanium alloy tubing joint surface luster is faded away, and has Bubble formation, the dielectric oxide film of and porous very thin at titanium alloy tubing joint Surface Creation one deck;
Subordinate phase, the spark discharge stage: along with the rising of electrolytic solution bath voltage, titanium alloy tubing joint outside progressively forms Micro-Arc Oxidized Ceramic Coating, then the Micro-Arc Oxidized Ceramic Coating of titanium alloy tubing joint is breakdown, and the surface of titanium alloy tubing joint starts to occur mobile intensive bright sparklet;
Phase III, the micro-arc discharge stage: along with the voltage of electrolytic solution electrolyzer and the increase of titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating, the spark on titanium alloy tubing joint surface becomes greatly gradually, and translational speed slows down relatively, rete ramp;
Fourth stage, the arc discharge stage: along with the oxidization time on titanium alloy tubing joint surface extends, the Micro-Arc Oxidized Ceramic Coating on titanium alloy tubing joint surface reaches certain thickness, puncturing of Micro-Arc Oxidized Ceramic Coating becomes more and more difficult, start the punctation that occurs that minority is larger, these spots no longer move, but are parked in the continuous discharge of a certain fixed position, and with sharp-pointed explosion; Be the Micro-Arc Oxidized Ceramic Coating of 10～15 μ m at the outside formation of titanium alloy tubing joint thickness.
4. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 3 surface, it is characterized in that: the cell body of described electrolytic solution electrolyzer selects PP or the manufacture of PVC material to form, and the cell body overcoat of electrolytic solution electrolyzer is reinforced manufacture by stainless material; Cell body inside or outer setting at described electrolytic solution electrolyzer have heat exchange refrigeration system.
5. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 4 surface, it is characterized in that: described heat exchange refrigeration system is cooling liner or cooling apparatus, the cell body inside of described electrolytic solution electrolyzer arranges cooling liner, or has cooling apparatus in the cell body outer setting of electrolytic solution electrolyzer.
6. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 1 surface, it is characterized in that: in described steps d, the cathode material of electrolytic solution electrolyzer selects stainless steel or carbon steel or nickel material manufacture to form.
7. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 1 surface, it is characterized in that: between described steps d and step e, there is steps d 1,
D1, process of refinement: electrophoresis is carried out in the titanium alloy tubing joint with Micro-Arc Oxidized Ceramic Coating that steps d is obtained or/and outside polished finish is down to below 0.18 frictional coefficient of titanium alloy tubing joint Micro-Arc Oxidized Ceramic Coating.
8. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 1 surface, it is characterized in that: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 16g/L, (NaPO
3)
6concentration be 14g/L, C
6h
5o
7na
32H
2the concentration of O is 2g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 380V, electric current continues to be elevated to 0.1A, and the differential arc oxidation treatment time is 24～25 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 12 μ m.
9. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 1 surface, it is characterized in that: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 18g/L, (NaPO
3)
6concentration be 12g/L, C
6h
5o
7na
32H
2the concentration of O is 2.5g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 350V, electric current continues to be elevated to 0.15A, and the differential arc oxidation treatment time is 32～37 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 14 μ m.
10. according to the differential arc oxidation treatment method on titanium alloy tubing joint claimed in claim 1 surface, it is characterized in that: the electrolytic solution in the electrolytic solution electrolyzer of described steps d is selected Na
2siO
3(NaPO
3)
6and C
6h
5o
7na
32H
2o mixes and makes electrolytic solution, described Na
2siO
3concentration be 12g/L, (NaPO
3)
6concentration be 16g/L, C
6h
5o
7na
32H
2the concentration of O is 1.5g/L; The voltage of controlling electrolytic solution electrolyzer continues to be elevated to 320V, electric current continues to be elevated to 0.05A, and the differential arc oxidation treatment time is 18～22 minutes, and the thickness that forms Micro-Arc Oxidized Ceramic Coating is 10 μ m.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111519231A (en) * | 2020-05-11 | 2020-08-11 | 中国石油天然气集团有限公司 | Surface treatment method for short section of titanium alloy oil pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107427084A (en) * | 2015-01-22 | 2017-12-01 | 尤特维吉环球爱普公司 | The electronic cigarette of electron transport unit and box including the unit and box and the method conveyed to trandfer fluid |
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| CN111519231B (en) * | 2020-05-11 | 2021-06-29 | 中国石油天然气集团有限公司 | Surface treatment method for short section of titanium alloy oil pipe |
| CN113061895A (en) * | 2021-03-04 | 2021-07-02 | 中国兵器科学研究院宁波分院 | Micro-arc oxidation treatment method for surface of titanium alloy fastener |
| CN113061895B (en) * | 2021-03-04 | 2023-04-28 | 中国兵器科学研究院宁波分院 | Micro-arc oxidation treatment method for surface of titanium alloy fastener |
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