CN109082617A - Improve the mixing yoghurt method of titanium alloy anti-corrosion wear performance - Google Patents
Improve the mixing yoghurt method of titanium alloy anti-corrosion wear performance Download PDFInfo
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- CN109082617A CN109082617A CN201811080593.1A CN201811080593A CN109082617A CN 109082617 A CN109082617 A CN 109082617A CN 201811080593 A CN201811080593 A CN 201811080593A CN 109082617 A CN109082617 A CN 109082617A
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- Prior art keywords
- titanium alloy
- mixing yoghurt
- wear performance
- corrosion wear
- mixing
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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
Abstract
The invention discloses a kind of mixing yoghurt methods for improving titanium alloy anti-corrosion wear performance, comprising the following steps: 1) anneals to Ti-6Al-4V titanium alloy plate to be processed；2) surface and oil contaminant, removal oxide on surface impurity are washed；3) it is stirred friction working process, mixing yoghurt parameter is 100~200rpm of revolving speed, 25~50mm/min of travel speed.The present invention reduces mixing yoghurt travel speed to the scope of the invention, and plain arch spacing is small, rises and falls small, can get the outstanding Ti-6Al-4V sheet fabrication surface of surface quality.After this method is handled, the surface macro morphology of material after processing can not only be improved, Ti-6Al-4V plate anti-corrosion wear performance greatly improves, and wear rate can be down to 20% or so of untreated preceding coarse-grain plate.
Description
Technical field
The invention belongs to metal working technical areas, and in particular to a kind of stirring for improving titanium alloy anti-corrosion wear performance
Rub processing method.
Background technique
Titanium alloy have density is low, mechanical performance is excellent, corrosion resistance is outstanding, shock resistance is excellent, be aviation boat
It, the important feature material of field of marine equipment.But usual titanium alloy hardness is lower, and antiwear and friction reduction property is poor, affects it
Use scope.The outstanding corrosion resistance of titanium alloy is derived from the oxidation film that its surface is formed.Titanium is thermodynamically unstable deposit
Belong to, passivation potential is relatively negative, easily forms dense oxidation film in atmosphere and aqueous solution.Although Oxide scale on Ti base alloys is relatively thin, it has
There is a good self-healing property, when destruction can repair rapidly, make up to form new protective film, titanium alloy is made to have good corrosion resistance.
If titanium alloy is frayed in use, surface film oxide damage can accelerate its corrosion, and therefore, titanium alloy structure material is in severe item
Using corrosive wear interaction influence will be will receive under part, enhance its failure rate.
Its hardness can be improved by refining crystal grain in titanium alloy, improves its abrasion resistance properties.Added by being deformed under reasonable process
Work can achieve grain refinement effect.The fine grain effect that common variation mode, such as extruding, rolling, forging reach is limited, it is more difficult to reach
To the Ultra-fine Grained of Nano grade.Material micro-nano structure system can be reached by repeatedly shear-deformable using severe plastic deformation mode
Standby purpose.
Mixing yoghurt technology is derived by agitating friction welding technology, utilizes the stirring-head " rotation-stirring-of on-consumable formula
Advance " composite machine movement, the preparation of material surface micro-nano structure can be realized by mixing yoghurt.Metal in process
Material undergoes severe plastic deformation, and high dislocation density stirring area tissue is heated to occur dynamic recrystallization repeatedly, realizes worked structure
Densification refines surface microstructure.Mixing needle does not need to penetrate machined material during mixing yoghurt, and single pass stirring rubs
Wiping working process can be used for processing small-volume workpiece, and the multi-pass mixing yoghurt that partly overlaps can realize large-area workpiece surface
Processing.Mixing yoghurt has the characteristics that pollution-free, repeatable strong, low energy consumption, strong operability, has significant engineering meaning
Justice.The revolving speed that titanium alloy mixing yoghurt is usually selected is in 300rpm or more, and travel speed is in 50mm/min or more.Usually stir
It mixes friction processing peak temperature and determines Ti-6Al-4V tissue characteristic, when processing peak temperature lower than α/β phase transition temperature, usually
Tiny equiax crystal is formed, is higher than α/β phase transition temperature when processing peak temperature, is usually formed lamellar α crystal grain, which is
Changed by β phase when being cooled to phase transition temperature and is formed.
Summary of the invention
For the lower problem of current titanium alloy corrosion wear characteristic, the purpose of the present invention is to provide one kind to pass through slow-speed
Speed carries out surface modification to titanium alloy with the mixing yoghurt gone slowly into speeds match, forms titanium alloy micro-nano structure surface,
The method for improving titanium alloy anti-corrosion wear performance.
Realizing the technical solution of the purpose is:
A kind of mixing yoghurt method improving titanium alloy anti-corrosion wear performance, comprising the following steps:
1) it anneals to Ti-6Al-4V titanium alloy plate to be processed；
2) surface and oil contaminant, removal oxide on surface impurity are washed；
3) it is stirred friction working process, mixing yoghurt parameter is 100~200rpm of revolving speed, travel speed 25~
50mm/min。
Tungsten-rhenium alloy material stirring-head, stirring-head size are as follows: shaft shoulder diameter 15mm is stirred are selected in mixing yoghurt processing
Mix the long 2mm of needle, end diameter 3mm, root diameter (RD) 8mm, main shaft angle 2.5o, drafts 0.5mm.
Annealing temperature in step 1) is 600 DEG C, annealing time 2h.
Plate surface greasy dirt is gone using acetone soln cleaning in step 2), milling is carried out to machined surface and removes oxide on surface
Impurity.
The mixing yoghurt processing of step 3) carries out under the protection of argon gas, is carried out using recirculated water to plate cold
But.
Beneficial effects of the present invention: mixing yoghurt travel speed is reduced to the scope of the invention, plain arch spacing is small, rises
Lie prostrate small, the outstanding Ti-6Al-4V sheet fabrication surface of available surface quality.After this method is handled, it can not only improve and add
The surface macro morphology of material after work, Ti-6Al-4V plate anti-corrosion wear performance greatly improve, and wear rate can be down to untreated
20% or so of preceding coarse-grain plate.
Detailed description of the invention
Fig. 1 is the specimen surface macro morphology figure after the method for the present invention is handled.
Fig. 2 is the sample heterogeneous microstructure figure after the method for the present invention is handled.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but not thereby limiting the invention.
Experimental method in following embodiments is unless otherwise instructed conventional method.
Following embodiment is stirred at friction processing Ti-6Al-4V titanium alloy plate using tungsten-rhenium alloy stirring-head
Reason, stirring-head shaft shoulder diameter 15mm, mixing needle length 2mm, mixing needle root diameter (RD) 8mm, end diameter 3mm.Agitating friction adds
Main shaft angle 2.5o during work, drafts 0.5mm.Stirring-head is protected using high-purity argon gas during mixing yoghurt
Shield carries out pressure cooling to plate tissue after processing using recirculated water, keeps Ti-6Al-4V titanium alloy plate fine grained texture.
Embodiment 1
Processing is using annealing Ti-6Al-4V titanium alloy plate, and annealing temperature is 600 DEG C, time 2h.By plate before processing
It is immersed in acetone soln, the surface and oil contaminant of sample is fallen using ultrasonic cleaning.Milling is carried out to machined surface, removes surface oxidation
The impurity such as object.Mixing yoghurt parameter is revolving speed 100rpm, travel speed 25mm/min, processes rear surface quality such as Fig. 1 a institute
Show, surface quality is good, and Microstructure characteristics are as shown in Figure 2 a, and stirring area crystallite dimension is 0.4 μm, reaches nanocrystalline ruler
It is very little.After tested, after carrying out material surface processing using the present invention, which is mentioned
Height, sample immerses simulated seawater, in load 10N, frequency 2Hz, and in the reciprocating friction and wear test of contact length 10mm, constant voltage
Under the conditions of 0.3V, undressed board samples wear rate is 1.18 × 10-3mm3/ Nm, after processing method of the present invention, plate
Wear rate drops to 0.35 × 10-3mm3/N·m。
Embodiment 2
Processing is using annealing Ti-6Al-4V titanium alloy plate, and annealing temperature is 600 DEG C, time 2h.By plate before processing
It is immersed in acetone soln, the surface and oil contaminant of sample is fallen using ultrasonic cleaning.Milling is carried out to machined surface, removes surface oxidation
The impurity such as object.Mixing yoghurt parameter is revolving speed 100rpm, travel speed 50mm/min.Process rear surface quality such as Fig. 1 b institute
Show, surface quality shows material mobility under the technique and is limited, and surface undulation is larger, Microstructure characteristics such as Fig. 2 b institute
Show, stirring area average grain size is 0.5 μm, reaches nanocrystalline size.After tested, material surface processing is carried out using the present invention
Afterwards, which improves, and sample immerses simulated seawater, in load 10N, frequency
2Hz, in the reciprocating friction and wear test of contact length 10mm, under the conditions of constant voltage 0.3V, undressed sample wear rate is 1.18
×10-3mm3/ Nm, after surface treatment method of the present invention, wear rate drops to 0.41 × 10-3mm3/N·m。
Embodiment 3
600 DEG C are carried out to Ti-6Al-4V titanium alloy plate, the time is the annealing of 2h.Utilize acetone soln ultrasonic wave
It washes specimen surface greasy dirt and mechanically removes oxide on surface impurity.Mixing yoghurt parameter is revolving speed
200rpm, travel speed 25mm/min.Process rear surface quality as illustrated in figure 1 c, surface quality is good, surface plain arch spacing
Small, Microstructure characteristics are as shown in Figure 2 c, and stirring area average grain size is 0.4 μm, reach nanocrystalline size.After tested,
After carrying out material surface processing using the present invention, which is improved, and sample immerses
Simulated seawater, in load 10N, frequency 2Hz, in the reciprocating friction and wear test of contact length 10mm, under the conditions of constant voltage 0.3V,
Undressed sample wear rate is 1.18 × 10-3mm3/ Nm, after surface treatment method of the present invention, wear rate drops to 0.28
×10-3mm3/N·m。
Embodiment 4
Processing is using annealing Ti-6Al-4V titanium alloy plate, and annealing temperature is 600 DEG C, time 2h.Use acetone soln
Plate ultrasonic cleaning is carried out, surface and oil contaminant is washed away.Milling, the impurity such as removal oxide on surface are carried out to machined surface.Stirring rubs
Wiping machined parameters are revolving speed 200rpm, travel speed 50mm/min.It is as shown in Figure 1 d to process rear surface quality, between the plain arch of surface
Away from larger, Microstructure characteristics are as shown in Figure 2 d, and stirring area average grain size is 1.1 μm, close to nanocrystalline size.Through surveying
Examination, after carrying out material surface processing using the present invention, which is improved, sample
Simulated seawater is immersed, in load 10N, frequency 2Hz, in the reciprocating friction and wear test of contact length 10mm, constant voltage 0.3V item
Under part, undressed sample wear rate is 1.18 × 10-3mm3/ Nm, after surface treatment method of the present invention, wear rate decline
To 0.57 × 10-3mm3/N·m。
Embodiment 5
Processing is using annealing Ti-6Al-4V titanium alloy plate, and annealing temperature is 600 DEG C, time 2h.Use acetone soln
Plate ultrasonic cleaning is carried out, surface and oil contaminant is washed away.Milling, the impurity such as removal oxide on surface are carried out to machined surface.Stirring rubs
Wiping machined parameters are revolving speed 150rpm, travel speed 30mm/min.It is larger to process rear surface plain arch spacing, the average crystalline substance in stirring area
Particle size is 0.6 μm, is nanocrystalline size.After tested, after carrying out material surface processing using the present invention, the Ti-6Al-4V titanium
Sheet alloy anti-corrosion wear performance improves, and sample immerses simulated seawater, in load 10N, frequency 2Hz, contact length 10mm's
In reciprocating friction and wear test, under the conditions of constant voltage 0.3V, undressed sample wear rate is 1.18 × 10-3mm3/ Nm is used
After surface treatment method of the present invention, wear rate drops to 0.52 × 10-3mm3/N·m。
Claims (5)
1. a kind of mixing yoghurt method for improving titanium alloy anti-corrosion wear performance, which comprises the following steps:
1) it anneals to Ti-6Al-4V titanium alloy plate to be processed；
2) surface and oil contaminant, removal oxide on surface impurity are washed；
3) it is stirred friction working process, mixing yoghurt parameter is 100~200rpm of revolving speed, travel speed 25~
50mm/min。
2. improving the mixing yoghurt method of titanium alloy anti-corrosion wear performance as described in claim 1, which is characterized in that
Tungsten-rhenium alloy material stirring-head, stirring-head size are as follows: shaft shoulder diameter 15mm, mixing needle are long are selected in mixing yoghurt processing
2mm, end diameter 3mm, root diameter (RD) 8mm, main shaft angle are 2.5 °, drafts 0.5mm.
3. improving the mixing yoghurt method of titanium alloy anti-corrosion wear performance as described in claim 1, which is characterized in that
Annealing temperature in step 1) is 600 DEG C, annealing time 2h.
4. improving the mixing yoghurt method of titanium alloy anti-corrosion wear performance as described in claim 1, which is characterized in that
Plate surface greasy dirt is gone using acetone soln cleaning in step 2), milling is carried out to machined surface and removes oxide on surface impurity.
5. improving the mixing yoghurt method of titanium alloy anti-corrosion wear performance as described in claim 1, which is characterized in that
The mixing yoghurt processing of step 3) carries out under the protection of argon gas, is cooled down using recirculated water to plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080593.1A CN109082617A (en) | 2018-09-17 | 2018-09-17 | Improve the mixing yoghurt method of titanium alloy anti-corrosion wear performance |
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| CN201811080593.1A CN109082617A (en) | 2018-09-17 | 2018-09-17 | Improve the mixing yoghurt method of titanium alloy anti-corrosion wear performance |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030111147A1 (en) * | 2001-12-18 | 2003-06-19 | Keener Steven G. | Method for preparing ultra-fine grain titanium and titanium-alloy articles and articles prepared thereby |
| CN105463451A (en) * | 2015-11-30 | 2016-04-06 | 西安建筑科技大学 | Method for improving wear resistance and high-temperature resistance of stirring head for stirring and friction welding |
| CN107858617A (en) * | 2017-11-06 | 2018-03-30 | 重庆理工大学 | The method that low-rotate speed mixing yoghurt was modified and prepared wear-resistant titanium surface to titanium surface |
-
2018
- 2018-09-17 CN CN201811080593.1A patent/CN109082617A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030111147A1 (en) * | 2001-12-18 | 2003-06-19 | Keener Steven G. | Method for preparing ultra-fine grain titanium and titanium-alloy articles and articles prepared thereby |
| CN105463451A (en) * | 2015-11-30 | 2016-04-06 | 西安建筑科技大学 | Method for improving wear resistance and high-temperature resistance of stirring head for stirring and friction welding |
| CN107858617A (en) * | 2017-11-06 | 2018-03-30 | 重庆理工大学 | The method that low-rotate speed mixing yoghurt was modified and prepared wear-resistant titanium surface to titanium surface |
Non-Patent Citations (1)
| Title |
|---|
| SHUDE JI ET AL.: "Joint formation and mechanical properties of back heating assisted friction stir welded Ti–6Al–4V alloy", 《 MATERIALS AND DESIGN》 * |
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