CN108893651A - A kind of high-strength high-ductility corrosion titanium alloy and preparation method thereof - Google Patents
A kind of high-strength high-ductility corrosion titanium alloy and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/008—Using a protective surface layer
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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Abstract
The present invention relates to a kind of titanium alloy material and preparation method, in particular to the preparation method of a kind of titanium alloy and high-strength high-ductility corrosion titanium alloy；Belong to titanium alloy material petroleum industry field, the composition range of the alloy is Ti- (4.5~5.5%) Al- by percentage to the quality（4.5~5.5%）Mo- (4.5~5.5%) V- (0.5~1.5%) Cr- (0.5~1.5%) Fe- (0.05~0.15%) Ru.The titanium alloy has good mechanical property and corrosion resisting property, and the intensity of alloy can be regulated and controled by being heat-treated.The yield strength of the alloy is σ0.2=1026~1049MPa, tensile strength σb=1052~1095MPa, elongation are ε=9.0~10.5%, and easy processing is excellent high-strength light structural material.It can be used in the petroleum industry environment of high temperature and pressure, can be used as vulnerable key structure components, improve industrial stability.
Description
Technical field
The present invention relates to a kind of titanium alloy material and preparation method, in particular to a kind of titanium alloy and high-strength high-ductility corrosion
The preparation method of titanium alloy；Belong to titanium alloy material petroleum industry field.
Background technique
Titanium alloy has low-density, high intensity and the performances such as corrosion-resistant, is widely used in large-scale airline carriers of passengers, military aircraft etc.
Field.In oil-gas mining field, titanium alloy is successfully applied to sea first, such as drilling riser pipe and drilling rod, on ocean platform
Heat exchanger, pump, valve and other auxiliary devices etc..Wherein for high tough near β titanium alloy tensile strength up to 140MPa, surrender is strong
It spends up to 1071MPa, and easy processing, is excellent high-strength light structural material.It can be used for the petroleum industry ring of high temperature and pressure
In border, it can be used as vulnerable key structure components, improve industrial stability.
Nowadays, the corrosion resistant alloy tubing that major part area in China's uses mainly is with 13Cr, super 13Cr and nickel-base alloy
Main, for highly corrosive area, the tubing of Cr alloy can no longer meet harsh environment demand, and nickel-base alloy tubing is also deposited
The defects of in processing technology complexity, production technology difficulty is big, material cost height, surface easy damaged.With the need of petroleum gas
Ask growing day by day, following oil country tubular good there should be the performances such as higher intensity, high pressure resistant high temperature, improved corrosion.Therefore it makes
Standby high tough, corrosion resistance titanium alloy a kind of out becomes a kind of demand.But the corrosion resistance of high-strength high-ductility titanium alloy is poor, can't
Cope with complicated corrosive environment.Therefore the excellent mechanical performance of high-strength high-ductility titanium alloy and corrosion resistance are combined, prepares one kind
High tough, corrosion resistance titanium alloy, come cope with the oil and gas exploitation under high-intensitive high corrosion environment be very it is necessary to.
In the prior art, have it is some for the improved technology of titanium alloy corrosion resistance, such as：
It is titanium alloy and its processing method that 104152744 A of Chinese patent CN, which discloses high intensity in a kind of low cost,
Alloying component is in terms of quality %：Al:3.5%~4.5%,V:2.0% ~ 3%, Fe:1.2% ~ 1.8%, platinum family element Pd:0.04%~0.08%
Or Ru:0.12% ~ 0.25% or Rh:0.08% ~ 0.14%, surplus Ti.The technology selects cheap Fe and TiO2, select inferior grade
Titanium sponge and addition TC4 recycle defective material, so that the preparation of new alloy compares TC4 alloy with cost and reduces by 30% or more, and by adding
Add platinum group metal（Ruthenium, palladium）Keep the corrosion resistance of alloy suitable with TA9 and TA10, and mechanical strength is higher by much than pure titanium.
101316939 A of Chinese patent CN provides a kind of corrosion resistant material titanium alloy.The alloying component contains platinum family gold
Belong to element 0.01 ~ 0.12%, also contain Al, Cr, Zr, Nb, Si, Sn and Mn, with quality % be calculated as 5% hereinafter, surplus by Ti and miscellaneous
Texture at.Show that the technology while inexpensively being manufactured, and can be such that corrosion resistance mentions by some column corrosion tests
It is high.
104955970 A of Chinese patent CN discloses a kind of with the titanium alloy for improving corrosion resistance and intensity, the titanium
Alloy is the titanium alloy used in the environment of bromine ion-containing, and platinum family element Ru is contained in terms of quality %：0.01 ~ 0.1%, rare earth
Element：0.001 ~ less than 0.02%, O：0 ~ less than 0.1%, surplus is made of Ti and impurity., contain Ni, Co, Mo, Cr, V and W
One or more of group of composition substitutes a part of Ti.Weight percent note, Ni≤1%, Co≤1%, Mo≤0.5%, V
≤0.5%,Cr≤0.5%,W≤0.5%.The titanium alloy has excellent corrosion resistance, in addition using inexpensively platinum family element Ru and
Rare earth element y reduces cost of material.
101481759 A of Chinese patent CN discloses a kind of method for preparing ruthenium-containing corrosion resistant titanium alloy.This technology is not
Change titanium alloy production technology, addition can produce the new smelting of the alloy containing ruthenium titanium in the form of ruthenium powder in electrode compression process
Industry, for the titanium alloy produced by the technology without being mingled with, Elemental redistribution is uniform.And it is easy to operate, low in cost, it solves
The problem of ruthenium adds in titanium alloy smelting, the alloy containing ruthenium titanium of production improves anti-corrosion under the premise of not influencing traditional performance
Property, meet the use needs of production field titanium alloy.
M Stern et al. has studied effect of the addition of platinum group metal to titanium alloy electrochemical and corrosion behavior, discloses
Platinum group metal is to the mechanism of action of titanium alloy, and the platinum group metal additive for demonstrating a small amount of Pd or Pt is situated between in thermal reduction property acid
In matter, the stability of oxidation film can be greatlyd improve, and then improve the corrosion resistance of titanium alloy.
R.W. Schutz et al. has studied TC4-0.1Ru in the application of the fluorine-containing environment downward moving exploitation gulf well of aggressivity.
Research shows that TC4-0.1Ru under different application conditions, all has excellent corrosion resistance and anti-stress corrosion performance.
In recent years, ruthenium-containing corrosion resistant alloy is increasingly taken seriously with its lower cost and good corrosion resistance.Platinum family gold
Belonging to elements ruthenium to be added to the protection mechanism provided in titanium is to promote cathodic depolarization, improves the power of electrochemical reaction cathode portion
It learns, improves current density.Promote titanium alloy to generate passivating film, improve the stability of passivating film, increases passivation section, and then improve
The corrosion resistance of alloy.And ruthenium is additive most cheap in platinum group metal, and the price of ruthenium powder is only the 1/4 ~ 1/5 of palladium powder.Institute
The corrosion resistance of titanium alloy, while cost performance with higher can be improved to add ruthenium.
But above-mentioned patented technology is improved only for the corrosion resistance of common alloy of titanium, is there is no a technology
For the corrosion proof raising of high-strength high-ductility titanium alloy, it is made to meet the needs of development of oil industry.
Summary of the invention
The purpose of the present invention is to provide a kind of with excellent corrosion resistance, and the titanium alloy with high-strength and high ductility.
The technical solution adopted by the present invention is that：
A kind of high-strength high-ductility titanium alloy adding micro ruthenium, it is characterized in that platinum group ruthenium is added in the alloy, in alloy
The content of ruthenium element is 0.05 ~ 0.15wt%.
It is a further object of the present invention to provide the processing methods of above-mentioned high-strength high-ductility corrosion titanium alloy.
The ingredient of alloy of the present invention is as follows：
A kind of high-strength high-ductility corrosion titanium alloy, it is characterised in that alloying component weight percent：Al:4.5%~5.5%,Mo:
4.5%~5.5%,V:4.5%~5.5%,Cr:0.5%~1.5%,Fe:0.5%~1.5%,Ru:0.05% ~ 0.15%, surplus Ti, other
Impurity require element be：C≤0.08%, N≤0.03%, H≤0.015%；
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, includes the following steps：
Step 1：Ingredient
Match by the ingredient of the titanium alloy of design and take each component, is uniformly mixed, compression moulding obtains blank；
Step 2：Alloy preparation
Using blank obtained by step 1 as consutrode, 2 vacuum consumable arc-meltings are carried out, it is cooling, it is resistance to obtain high-strength and high ductility
Lose titanium alloy ingot；When melting, vacuum degree≤1.33 × 10 in smelting furnace are controlled-2Pa。
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, in titanium alloy component Al, Mo, V, Fe with
The form of intermediate alloy is added, and Cr is added in the form of the metal of purity >=99.9%, and ruthenium is with the shape of the powder of purity >=99.99%
Formula is added, and the total content of titanium is collectively formed by the titanium in the titanium and titanium oxide in titaniferous intermediate alloy with titanium sponge in alloy.
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, in step 2, vacuum consumable electric arc is molten
The temperature of refining is 1600-1700 DEG C, and melting number is 2 times, and each smelting time is 30-60min.
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, step 2 gained alloy ingot surface are brushed
One layer of high temperature protective coating, in 1050 DEG C of heat preservation 90-150min after natural air drying, cogging forging obtains forging stock, cogging forging
When, final forging temperature is controlled at 800 DEG C or more；The forging stock hot rolling processing is prepared into plate.
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, the processing of forging stock hot rolling are prepared into hot rolling
Plate；Before hot rolling, one layer of high temperature protective coating, hot rolling after natural air drying are brushed on forging stock surface；Hot-rolled temperature is 1000 DEG C, heat preservation
60min；The total deformation of the hot rolling is 70-80%.
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, the annealed processing of hot rolled plate obtain plate
Material；Annealing temperature：750 DEG C, soaking time：30min, it is air-cooled.
A kind of preparation method of high-strength high-ductility corrosion titanium alloy of the present invention, the high temperature protective coating are oxidation
Chromium is brushed with a thickness of 0.3-0.6mm.
The characteristics of the method for the present invention, is as described below：
（1）In the method for the present invention, by the alloying action of Ti, Mo, Cr, Al, V, Fe, under reasonable preparation process condition,
Achieve the purpose that the performance for optimizing titanium alloy, especially realizes high-strength and high ductility and corrosion proof Optimized Matching, it can be more
It is applied in petroleum industry and other field well.
（2）Add appropriate ruthenium（Ru）Element carries out Alloying Treatment, promotes cathodic depolarization effect, increases titanium alloy
The rate for generating passivating film, improves the stability of passivating film, reduces passive current density, improve the corrosion resistance of titanium alloy.
Detailed description of the invention
Fig. 1 is the open circuit potential figure of embodiment 1 and 6 sample of embodiment in 25 DEG C, 10%HCl solution.
Fig. 2 is the polarization curve of embodiment 1 and 6 sample of embodiment in 25 DEG C, 10%HCl solution.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention is made below further
Ground detailed description.
Embodiment 1
1, ingredient：By the ingredient of Ti-4.6wt%Al-5.3wt%Mo-5wt%V-0.8wt%Cr-1.2wt%Fe-0.1wt%Ru alloy
Match respectively and takes zero level sponge Ti, TiO2, metal Cr, V-Al-Fe intermediate alloy, be uniformly mixed after Al-60Mo intermediate alloy；It is described
Purity >=99.99% of Ru.
2, melting：The raw material prepared is pressed into electrode on a hydraulic press, carries out 2 meltings in vacuum consumable electrode arc furnace,
When melting, vacuum degree≤10 in furnace are controlled-2Pa, furnace temperature are 1600 DEG C, and the time of each melting is 30min；Alloy is made
Ingot casting.Ingot casting strip off the skin after being fully cooled and removes the oxide layer of outside.
3, cogging is forged：Ingot casting surface is first brushed into the chromium oxide that a layer thickness is 0.3-0.6mm, natural air drying before forging
Afterwards, 1000 DEG C of heat preservation 60min in resistance furnace, then carry out cogging forging on flat-die forging machine, and final forging temperature is controlled 800
DEG C or more.20mm × 150mm × 200mm slab is obtained, figuring of surface is carried out to it after slab is cooling, continues hot rolling
Processing.
4, hot rolling：20mm × 150mm × 200mm forging stock is carried out to 1000 DEG C/30min annealing in resistance furnace, then
Carry out hot rolling immediately, carry out intermediate annealing after rolling 10mm along its length, roll obtain after 6 passages 2.5mm × 500mm ×
The hot rolled plate of 200mm.
5, it makes annealing treatment：After the chromium oxide that hot rolling plate surface brushes that a layer thickness is 0.3-0.6mm, in chamber type electric resistance furnace
In made annealing treatment, annealing temperature is 750 DEG C, soaking time 30min, air-cooled.
Embodiment 2
1, ingredient：By the ingredient of Ti-5.2wt%Al-5.3wt%Mo-5wt%V-1.4wt%Cr-0.7wt%Fe-0.05wt%Ru alloy
Match respectively and takes zero level sponge Ti, TiO2, metal Cr, V-Al-Fe intermediate alloy, be uniformly mixed after Al-60Mo intermediate alloy；It is described
Purity >=99.99% of Ru.
2, melting：The raw material prepared is pressed into electrode on a hydraulic press, carries out 2 meltings in vacuum consumable electrode arc furnace,
When melting, vacuum degree≤10 in furnace are controlled-2Pa, furnace temperature are 1600 DEG C, and the time of each melting is 30min；Alloy is made
Ingot casting.Ingot casting strip off the skin after being fully cooled and removes the oxide layer of outside.
3, cogging is forged：Ingot casting surface is first brushed into the chromium oxide that a layer thickness is 0.3-0.6mm, natural air drying before forging
Afterwards, 1000 DEG C of heat preservation 60min in resistance furnace, then carry out cogging forging on flat-die forging machine, and final forging temperature is controlled 800
DEG C or more.20mm × 150mm × 200mm slab is obtained, figuring of surface is carried out to it after slab is cooling, continues hot rolling
Processing.
4, hot rolling：20mm × 150mm × 200mm forging stock is carried out to 1000 DEG C/30min annealing in resistance furnace, then
Carry out hot rolling immediately, carry out intermediate annealing after rolling 10mm along its length, roll obtain after 6 passages 2.5mm × 500mm ×
The hot rolled plate of 200mm.
5, it makes annealing treatment：After the chromium oxide that hot rolling plate surface brushes that a layer thickness is 0.3-0.6mm, in chamber type electric resistance furnace
In made annealing treatment, annealing temperature is 750 DEG C, soaking time 30min, air-cooled.
Embodiment 3
1, ingredient：By the ingredient of Ti-5wt%Al-4.7wt%Mo-4.6wt%V-0.9wt%Cr-1.3wt%Fe-0.07wt%Ru alloy
Match respectively and takes zero level sponge Ti, TiO2, metal Cr, V-Al-Fe intermediate alloy, be uniformly mixed after Al-60Mo intermediate alloy；It is described
Purity >=99.99% of Ru.
2, melting：The raw material prepared is pressed into electrode on a hydraulic press, carries out 2 meltings in vacuum consumable electrode arc furnace,
When melting, vacuum degree≤10 in furnace are controlled-2Pa, furnace temperature are 1600 DEG C, and the time of each melting is 30min；Alloy is made
Ingot casting.Ingot casting strip off the skin after being fully cooled and removes the oxide layer of outside.
3, cogging is forged：Ingot casting surface is first brushed into the chromium oxide that a layer thickness is 0.3-0.6mm, natural air drying before forging
Afterwards, 1000 DEG C of heat preservation 60min in resistance furnace, then carry out cogging forging on flat-die forging machine, and final forging temperature is controlled 800
DEG C or more.20mm × 150mm × 200mm slab is obtained, figuring of surface is carried out to it after slab is cooling, continues hot rolling
Processing.
4, hot rolling：20mm × 150mm × 200mm forging stock is carried out to 1000 DEG C/30min annealing in resistance furnace, then
Carry out hot rolling immediately, carry out intermediate annealing after rolling 10mm along its length, roll obtain after 6 passages 2.5mm × 500mm ×
The hot rolled plate of 200mm.
5, it makes annealing treatment：After the chromium oxide that hot rolling plate surface brushes that a layer thickness is 0.3-0.6mm, in chamber type electric resistance furnace
In made annealing treatment, annealing temperature is 750 DEG C, soaking time 30min, air-cooled.
Embodiment 4
1, ingredient：By the ingredient of Ti-4.8wt%Al-5wt%Mo-4.6wt%V-0.6wt%Cr-1.1wt%Fe-0.13wt%Ru alloy
Match respectively and takes zero level sponge Ti, TiO2, metal Cr, V-Al-Fe intermediate alloy, be uniformly mixed after Al-60Mo intermediate alloy；It is described
Purity >=99.99% of Ru.
2, melting：The raw material prepared is pressed into electrode on a hydraulic press, carries out 2 meltings in vacuum consumable electrode arc furnace,
When melting, vacuum degree≤10 in furnace are controlled-2Pa, furnace temperature are 1600 DEG C, and the time of each melting is 30min；Alloy is made
Ingot casting.Ingot casting strip off the skin after being fully cooled and removes the oxide layer of outside.
3, cogging is forged：Ingot casting surface is first brushed into the chromium oxide that a layer thickness is 0.3-0.6mm, natural air drying before forging
Afterwards, 1000 DEG C of heat preservation 60min in resistance furnace, then carry out cogging forging on flat-die forging machine, and final forging temperature is controlled 800
DEG C or more.20mm × 150mm × 200mm slab is obtained, figuring of surface is carried out to it after slab is cooling, continues hot rolling
Processing.
4, hot rolling：20mm × 150mm × 200mm forging stock is carried out to 1000 DEG C/30min annealing in resistance furnace, then
Carry out hot rolling immediately, carry out intermediate annealing after rolling 10mm along its length, roll obtain after 6 passages 2.5mm × 500mm ×
The hot rolled plate of 200mm.
5, it makes annealing treatment：After the chromium oxide that hot rolling plate surface brushes that a layer thickness is 0.3-0.6mm, in chamber type electric resistance furnace
In made annealing treatment, annealing temperature is 750 DEG C, soaking time 30min, air-cooled.
Embodiment 5
1, ingredient：By the ingredient of Ti-5.2wt%Al-5wt%Mo-4.6wt%V-0.7wt%Cr-1.3wt%Fe-0.15wt%Ru alloy
Match respectively and takes zero level sponge Ti, TiO2, metal Cr, V-Al-Fe intermediate alloy, be uniformly mixed after Al-60Mo intermediate alloy；It is described
Purity >=99.99% of Ru.
2, melting：The raw material prepared is pressed into electrode on a hydraulic press, carries out 2 meltings in vacuum consumable electrode arc furnace,
When melting, vacuum degree≤10 in furnace are controlled-2Pa, furnace temperature are 1600 DEG C, and the time of each melting is 30min；Alloy is made
Ingot casting.Ingot casting strip off the skin after being fully cooled and removes the oxide layer of outside.
3, cogging is forged：Ingot casting surface is first brushed into the chromium oxide that a layer thickness is 0.3-0.6mm, natural air drying before forging
Afterwards, 1000 DEG C of heat preservation 60min in resistance furnace, then carry out cogging forging on flat-die forging machine, and final forging temperature is controlled 800
DEG C or more.20mm × 150mm × 200mm slab is obtained, figuring of surface is carried out to it after slab is cooling, continues hot rolling
Processing.
4, hot rolling：20mm × 150mm × 200mm forging stock is carried out to 1000 DEG C/30min annealing in resistance furnace, then
Carry out hot rolling immediately, carry out intermediate annealing after rolling 10mm along its length, roll obtain after 6 passages 2.5mm × 500mm ×
The hot rolled plate of 200mm.
5, it makes annealing treatment：After the chromium oxide that hot rolling plate surface brushes that a layer thickness is 0.3-0.6mm, in chamber type electric resistance furnace
In made annealing treatment, annealing temperature is 750 DEG C, soaking time 30min, air-cooled.
Embodiment 6
1, ingredient：Match respectively by the ingredient of Ti-4.6wt%Al-5wt%Mo-5wt%V-0.8wt%Cr-1.2wt%Fe alloy and takes zero level
Sponge Ti, TiO2, metal Cr, V-Al-Fe intermediate alloy, be uniformly mixed after Al-60Mo intermediate alloy；The purity of the Ru >=
99.99%。
2, melting：The raw material prepared is pressed into electrode on a hydraulic press, carries out 2 meltings in vacuum consumable electrode arc furnace,
When melting, vacuum degree≤10-2Pa in furnace is controlled, furnace temperature is 1600 DEG C, and the time of each melting is 30min；Alloy is made
Ingot casting.Ingot casting strip off the skin after being fully cooled and removes the oxide layer of outside.
3, cogging is forged：Ingot casting surface is first brushed into the chromium oxide that a layer thickness is 0.3-0.6mm, natural air drying before forging
Afterwards, 1000 DEG C of heat preservation 60min in resistance furnace, then carry out cogging forging on flat-die forging machine, and final forging temperature is controlled 800
DEG C or more.20mm × 150mm × 200mm slab is obtained, figuring of surface is carried out to it after slab is cooling, continues hot rolling
Processing.
4, hot rolling：20mm × 150mm × 200mm forging stock is carried out to 1000 DEG C/30min annealing in resistance furnace, then
Carry out hot rolling immediately, carry out intermediate annealing after rolling 10mm along its length, roll obtain after 6 passages 2.5mm × 500mm ×
The hot rolled plate of 200mm.
5, it makes annealing treatment：After the chromium oxide that hot rolling plate surface brushes that a layer thickness is 0.3-0.6mm, in chamber type electric resistance furnace
In made annealing treatment, annealing temperature is 750 DEG C, soaking time 30min, air-cooled.
Performance detection is carried out to titanium alloy material obtained below, further displays the high-intensitive, corrosion-resistant of titanium alloy of the present invention
Performance.
In conjunction with Fig. 1 as can be seen that embodiment 1 compares embodiment 1, open circuit potential has certain raising, and passes through open circuit potential
The time that curve can be seen that 1 Damage of Passive Film of embodiment in a corrosive environment is longer compared to embodiment 6, illustrates passivating film
Stability is more preferable.In conjunction with Fig. 2 as can be seen that titanium alloy made from by the method for the invention is reduced due to the presence of ruthenium element
Corrosion electric current density, and the stability of passivating film is improved, passive current density is reduced, to the corrosion resistance for promoting titanium alloy
Play the role of apparent.
Explanation：
1) polarization curve leads to MUL TI AUTOLAB M204 type electrochemical workstation using Switzerland ten thousand.Specimen size be 10mm ×
10mm。
Claims (8)
1. a kind of high-strength high-ductility corrosion titanium alloy, ingredient are by percentage to the quality：
Al 4.5%~5.5%；
Mo 4.5%~5.5%；
V 4.5%~5.5%；
Cr 0.5%~1.5%；
Fe 0.5%~1.5%；
Ru 0.05% ~ 0.15%, surplus Ti.
2. a kind of preparation method of high-strength high-ductility corrosion titanium alloy as described in claim 1, it is characterised in that including following
Step：
Step 1：Ingredient
Ingredient by design titanium alloy is uniformly mixed, compression moulding obtains blank with each component is taken；
Step 2：Alloy preparation
Using the resulting blank of step 1 as consutrode, 2 vacuum consumable arc-meltings are carried out, it is cooling, obtain high-strength and high ductility
Anti-corrosive Ti-alloy ingot casting；When melting, vacuum degree≤10 in furnace are controlled-2Pa, smelting temperature are 1600 DEG C.
3. a kind of preparation method of high-strength high-ductility corrosion titanium alloy according to claim 2, it is characterised in that：Step 2
One layer of high temperature protective coating of gained alloy cast ingot external coating, in 1000 DEG C of heat preservation 60min after natural air drying, cogging forging is obtained
To forging stock, final forging temperature is controlled at 800 DEG C or more.
4. a kind of preparation method of high-strength high-ductility corrosion titanium alloy according to claim 3, it is characterised in that：Forging stock warp
Hot rolling treatment is prepared into hot rolled plate；Before hot rolling, the hot rolling after one layer of high temperature protective coating of forging stock external coating, natural air drying；Heat
Rolling temperature is 1000 DEG C；The total deformation of the hot rolling is 80%-90%.
5. a kind of preparation method of high-strength high-ductility corrosion titanium alloy according to claim 4, it is characterised in that：In hot rolling
Plate surface brushes one layer of high temperature protective coating, carries out in 750 DEG C air-cooled after annealing 30min, obtains annealed state plate.
6. a kind of preparation method of high-strength high-ductility corrosion titanium alloy, feature according to claim 3-5 any one
It is：In titanium alloy component, Al, Mo, V, Fe are added in the form of intermediate alloy, and Cr is in the form of the metal of purity >=99.9%
Be added, ruthenium is added in the form of the powder of purity >=99.99%, in alloy the total content of titanium by the titanium in titaniferous intermediate alloy with
And the titanium in titanium oxide is collectively formed with titanium sponge.
7. a kind of preparation method of high-strength high-ductility corrosion titanium alloy according to claim 6, it is characterised in that：It is prepared
High-strength high-ductility corrosion titanium alloy yield strength be σ0.2=1026~1049MPa, tensile strength σb=1052~
1095MPa, elongation are ε=9.0~10.5%.
8. a kind of preparation method of high-strength high-ductility corrosion titanium alloy, feature according to claim 3-5 any one
It is：The high temperature protective coating is chromium oxide, is brushed with a thickness of 0.3-0.6mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442613A (en) * | 2020-11-09 | 2021-03-05 | 中国石油天然气集团有限公司 | 105ksi titanium alloy pipe for petroleum drill pipe and manufacturing method thereof |
| CN112813299A (en) * | 2019-11-12 | 2021-05-18 | 新疆大学 | High-strength low-cost corrosion-resistant titanium alloy |
| CN114737036A (en) * | 2022-03-30 | 2022-07-12 | 哈尔滨工业大学 | Preparation method of high-plasticity titanium alloy ultrathin plate for hydrogen fuel cell bipolar plate |
| CN116397132A (en) * | 2023-04-14 | 2023-07-07 | 西北有色金属研究院 | High-performance low-cost two-phase titanium alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112813299A (en) * | 2019-11-12 | 2021-05-18 | 新疆大学 | High-strength low-cost corrosion-resistant titanium alloy |
| CN112442613A (en) * | 2020-11-09 | 2021-03-05 | 中国石油天然气集团有限公司 | 105ksi titanium alloy pipe for petroleum drill pipe and manufacturing method thereof |
| CN114737036A (en) * | 2022-03-30 | 2022-07-12 | 哈尔滨工业大学 | Preparation method of high-plasticity titanium alloy ultrathin plate for hydrogen fuel cell bipolar plate |
| CN114737036B (en) * | 2022-03-30 | 2024-02-20 | 哈尔滨工业大学 | Preparation method of high-plasticity titanium alloy ultrathin plate for bipolar plate of hydrogen fuel cell |
| CN116397132A (en) * | 2023-04-14 | 2023-07-07 | 西北有色金属研究院 | High-performance low-cost two-phase titanium alloy |
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