CN107099763A - A kind of agitating friction under water prepares the device and method of large scale fine grain magnesium alloy plate - Google Patents
A kind of agitating friction under water prepares the device and method of large scale fine grain magnesium alloy plate Download PDFInfo
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- CN107099763A CN107099763A CN201710379635.0A CN201710379635A CN107099763A CN 107099763 A CN107099763 A CN 107099763A CN 201710379635 A CN201710379635 A CN 201710379635A CN 107099763 A CN107099763 A CN 107099763A
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- magnesium alloy
- alloy plate
- jig
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- fine grain
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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
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
Abstract
The present invention relates to the device that a kind of agitating friction under water prepares large scale fine grain magnesium alloy plate, including being fixed in the stirring-head of frame and the cooling water tank of open top, jig is provided with cooling water tank, the height of the side wall of cooling water tank exceedes jig height, jig is provided with two pressing articles through jig, two pressing article be arranged in parallel, jig is provided with several clamp jigs, clamp jig pushes down pressing article, and stirring-head alignment jig can simultaneously be moved in the range of jig.Hardware supported is provided to prepare large scale fine grain magnesium alloy plate, is processed all the time in the cooling water in cooling water tank, the crystal grain of fine grain magnesium alloy is not roughened again.A kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate, large scale fine grain magnesium alloy plate is prepared in the multi-pass mixing yoghurt for forcing to be less than 100% using superposition rate under cooling condition of cooling water, multi-pass mixing yoghurt process is completed under cooling water.
Description
Technical field
The present invention relates to fine grain sheet material preparation field, more particularly to a kind of agitating friction under water prepares large scale fine grain magnesium
The device and method of alloy sheets.
Background technology
The features such as magnesium and magnesium alloy have high low density, specific stiffness and specific strength, good processability, but be somebody's turn to do due to most of
Material is solid matter cubic crystal structure, and slip system is few, and plastic deformation ability is poor under normal temperature, therefore the forming of magnesium alloy and work
Industry application is subject to certain restrictions.Many documents are it was demonstrated that crystal grain refinement is the effective of improvement magnesium alloy comprehensive mechanical property
Approach.Valiev in 1988 et al. proposes Sever Plastic Deformation process technology, traditional Sever Plastic Deformation technology such as passage first
Angle is extruded and high pressure torsion technology has very good effect to magnesium alloy grains, but due to being limited by equipment size, it is big preparing
It is difficult to break through in terms of size fine grain magnesium alloy plate.
Mixing yoghurt technology as a kind of acute Technology of Plastic Processing received much concern in recent years, 1999 first by
Mishra is proposed, thought is welded based on agitating friction, using the rubbing action between the mixing needle, the shaft shoulder and workpiece of rotation, to work
The larger shear strain of part generation and heat input, make material occur pyroplastic deformation and dynamic recrystallization, make crystal grain refinement, organize
Even compact, defect is reduced.Many scholars, which have proved the technology, with Refining Mg Alloy crystal grain and to obtain good mechanical property,
But due to stirring area of bed limitation, single pass mixing yoghurt region is smaller, it is impossible to prepare large size plate, limit its work
Application in industry.Wide plate material can be prepared by being less than 100% multi-pass mixing yoghurt technology using superposition rate, but at present
Aluminum alloy plate materials are focused primarily upon, multi-pass mixing yoghurt prepares the very rare all reports of large scale fine grain magnesium alloy plate.
Heat input is produced during multi-pass mixing yoghurt, grain coarsening or offset thin that passage is refined may be made
Change effect.Therefore, grain coarsening is solved urgently to be resolved hurrily as multi-pass mixing yoghurt preparation large scale magnesium alloy plate
Problem.
The content of the invention
For technical problem present in prior art, an object of the present invention is：A kind of agitating friction under water is provided
The device of large scale fine grain magnesium alloy plate is prepared, hardware condition is provided to prepare large scale fine grain magnesium alloy plate.
The second object of the present invention is：A kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate is provided,
The problem of making the grain coarsening that passage is refined during solution multi-pass mixing yoghurt large scale fine grain magnesium alloy plate.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
A kind of agitating friction under water prepares the device of large scale fine grain magnesium alloy plate, including be fixed in the stirring-head of frame with
And the cooling water tank of open top, cooling water tank is interior to be provided with jig, and the height of the side wall of cooling water tank exceedes jig
Height, jig be provided with two pressing articles through jig, two pressing articles be arranged in parallel, on jig
Provided with several clamp jigs, clamp jig pushes down pressing article, stirring-head alignment jig and can jig model
Enclose interior movement.After this structure, large scale fine grain magnesium alloy plate can be processed, during processing all the time in cooling water tank
Processed in cooling water, two pressing articles push down magnesium alloy plate to be processed respectively, and clamp jig pushes down pressing article again, and stirring-head exists
Multi-pass mixing yoghurt is carried out in the range of jig.
Jig is provided with smooth steel plate.After this structure, magnesium alloy plate to be processed is positioned over during processing
It is easy to processing on smooth steel plate.
Stirring-head is the mixing needle with right-handed thread and three tangent planes.This is the present apparatus more preferred embodiment.
The length of mixing needle is 5mm, and the root diameter (RD) of stirring-head is 7mm.This is the present apparatus more preferred embodiment.
Cooling water tank is provided with water inlet and discharge outlet, and the connecting line of water inlet and discharge outlet passes through jig.Using this
Cooling water is flowed into by water inlet after kind of structure, is flowed through after jig and to be flowed out by discharge outlet, it is ensured that effective utilization of cooling water.
A kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate, under the pressure cooling condition of cooling water
The multi-pass mixing yoghurt for being less than 100% using superposition rate prepares large scale fine grain magnesium alloy plate, and multi-pass stirring rubs
Process is wiped to complete under cooling water.Large scale fine grain magnesium alloy plate can be prepared after in this way, and can
The problem of making the grain coarsening that passage is refined during solution multi-pass mixing yoghurt large scale fine grain magnesium alloy plate.
Adjacent spacing between every time in multi-pass is 3.5mm, is overlapped in the way of side skew of drawing back.It is more excellent
The embodiment of choosing.
Specifically include following steps,
Step one：Prepare magnesium alloy plate to be processed, oxide removed using sand paper polishing, dried up with after alcohol washes,
Then lie on smooth steel plate, jig is fixed in clamp jig；
Step 2：Stirring-head is installed in the mixing yoghurt equipment for being configured with cooling water tank, first preliminary operation is pre- before processing
Heat, then debugs working process parameter, and working process parameter includes initial coordinate, stirring-head direction of rotation, rotary speed, advance
Angle of inclination between speed, processing distance, volume under pressure and mixing needle and vertical；
Step 3：Injected from water inlet to cooling water tank cooling water up to water level reaches magnesium alloy plate surface to be processed with
On, while spraying to the shaft shoulder and web contact position using cooling water, accelerate cooldown rate, while opening discharge outlet, keep water tank
Interior cooling water circulation flowing, keeps water level to be in above magnesium alloy plate.
Step 4：The machined parameters set according to step 2 carry out the first passage mixing yoghurt under water.
Step 5：Complete after the processing of the first passage, stirring-head returns to the first passage initial position, back pass edge processing side
To vertical direction draw back side skew 3.5mm position process back pass；
Step 6：According to step 5, the manufacturing procedure of follow-up n passages (n >=3) is continued to complete, large scale fine grain is prepared
Magnesium alloy plate.After the above method, the higher large scale fine grain magnesium alloy plate of mass can be prepared, and multi-pass adds
Work, the grain coarsening that rear passage processing will not be processed to preceding passage.
Wherein the direction of rotation of stirring-head is reversion, and rotary speed is 1000~1400rpm, and pace is 60mm/
Min, angle of inclination is 2.5 ° between mixing needle and vertical.More preferred embodiment.
Cooling water is injected up to water level reaches magnesium alloy to be processed to cooling water tank from water inlet with 43 ± 2mL/s flow velocity
Water level is kept to be in above magnesium alloy plate at 5mm in plate surface above 5mm, process.More preferred embodiment.
Generally speaking, the invention has the advantages that：
1st, a kind of agitating friction under water prepares the device of large scale fine grain magnesium alloy plate, to prepare large scale fine grain magnesium alloy
Sheet material provides hardware supported, can multi-pass processing large scale fine grain magnesium, in cooling water during processing all the time in cooling water tank
Processing, it is ensured that the crystal grain of fine grain magnesium alloy is not roughened again.
2nd, a kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate, under water agitating friction make magnesium alloy brilliant
Dynamic recrystallization occurs for grain, by accelerating cooldown rate come crystal grain thinning, is closed by multi-pass processing processing large scale fine grain magnesium
Golden plate.
3rd, a kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate, due in process using cold
But water is cooled down, and the processing temperature of back pass is not lifted, and is not roughened the crystal grain originally refined not only, and subsequently
Passage processing makes former crystal grain thinning further refine.
Brief description of the drawings
Fig. 1 prepares the stereochemical structure signal of the device of large scale fine grain magnesium alloy plate for a kind of agitating friction under water of the present invention
Figure；
Fig. 2 is the large scale fine grain magnesium alloy plate micro-organization chart that embodiment 1 is obtained；
Fig. 3 is the large scale fine grain magnesium alloy plate micro-organization chart that embodiment 2 is obtained.
Include in wherein Fig. 1：
1-stirring-head, 2-smooth steel plate, 3-jig, 4-clamp jig, 5-cooling water tank,
6-water inlet, 7-discharge outlet, 8-magnesium alloy plate to be processed, 9 --- pressing article.
Embodiment
Come that the present invention will be further described in detail below.
Embodiment 1
A kind of agitating friction under water prepares the device of large scale fine grain magnesium alloy plate, including is fixed in the stirring-head 1 of frame
And the cooling water tank 5 of open top, cooling water tank 5 is interior to be provided with jig 3, and the height of the side wall of cooling water tank 5 exceedes weldering
The height of platform 3 is connect, jig 3 is provided with two pressing articles 9 through jig 3, and two pressing articles 9 are parallel to be set
Put, jig 3 is provided with several clamp jigs 4, clamp jig 4 pushes down pressing article 9, and the alignment of stirring-head 1 jig 3 is simultaneously
It can be moved in the range of jig 3.After this structure, large scale fine grain magnesium alloy plate can be processed, is processed
When cooling water all the time in cooling water tank 5 in process, two pressing articles 9 push down magnesium alloy plate 8 to be processed, pressing plate folder respectively
Tool 4 pushes down pressing article 9 again, and stirring-head 1 carries out multi-pass mixing yoghurt in the range of jig 3.Set on jig 3
There is smooth steel plate 2.Magnesium alloy plate 8 to be processed is positioned on smooth steel plate 2 after this structure, during processing and is easy to add
Work.Stirring-head 1 is the mixing needle with right-handed thread and three tangent planes.This is the present apparatus more preferred embodiment.The length of mixing needle
Spend for 5mm, the root diameter (RD) of stirring-head 1 is 7mm.This is the present apparatus more preferred embodiment.Cooling water tank 5 is provided with water inlet
6 and discharge outlet 7, the connecting line of water inlet 6 and discharge outlet 7 passes through jig 3.Using cooling water after this structure by water inlet
6 flow into, and flow through after jig 3 and to be flowed out by discharge outlet 7, it is ensured that effective utilization of cooling water.
In the present embodiment, a kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate：From as cast condition AZ61
Magnesium alloy plate is as original magnesium alloy plate to be processed 8, and the length of magnesium alloy plate 8 to be processed is that 180mm, width are
165mm, highly be 6mm；It is processed using the mixing yoghurt equipment for being configured with cooling water tank 5, using normal temperature water cooling
System, a diameter of 18mm of the shaft shoulder of stirring-head 1, using multi-pass, mixing yoghurt method treats processing magnesium alloy sheet material 8 under water
It is processed, the spacing between the neighboring track in multi-pass time is 3.5mm, is overlapped in the way of side skew of drawing back, in cooling
Large scale fine grain magnesium alloy plate is prepared under the pressure cooling condition of water.
The method that large scale fine grain magnesium alloy plate is prepared using agitating friction under water, is also comprised the following steps：
Step one：Prepare described magnesium alloy plate to be processed 8, oxide is removed using the polishing of 2000# sand paper, alcohol is clear
Dry up, then lie on smooth steel plate 2, and jig 3 is fixed in clamp jig 4 after washing；Step 2：Supporting
Have cooling water tank 5 mixing yoghurt equipment frame on stirring-head 1 is installed, first preliminary operation preheating before processing, then debugging plus
Work technological parameter, working process parameter include initial coordinate, the direction of rotation of stirring-head 1, rotary speed, pace, processing away from
From the angle of inclination between, volume under pressure and mixing needle and vertical, the wherein direction of rotation of stirring-head 1 is reversion, rotation
Speed is 1000rpm, and pace is 60mm/min, and angle of inclination is 2.5 ° between mixing needle and vertical；Step 3：From
Water inlet 6 with 43 ± 2mL/s flow velocity to cooling water tank 5 inject cooling water until water level reach magnesium alloy plate surface to be processed with
Upper 5mm, while spraying to the shaft shoulder and web contact position using cooling water, accelerates cooldown rate, while opening discharge outlet 7, keeps
Cooling water circulation flows in water tank, keeps water level to be in above magnesium alloy plate at 5mm；Step 4：Set according to the step 2
Fixed working process parameter carries out the first passage mixing yoghurt under water.Step 5：Complete after the processing of the first passage, stirring-head
1 returns to the first passage initial position, vertical direction of the back pass along machine direction draw back side skew 3.5mm position and with
Back pass is processed with upper a time identical working process parameter；Step 6：According to step 5, follow-up 25 passage is continued to complete
Manufacturing procedure, prepare large scale fine grain magnesium alloy plate.
Large scale magnesium alloy plate surface prepared by the present embodiment is more smooth, and non-nuclear density gauge is visible.The present embodiment
The microstructure of prepared large scale magnesium alloy plate stirring area is as shown in Fig. 2 its average grain size is 3.4 μm, than general
It is thinner that logical mixing yoghurt prepares magnesium alloy crystal grain.
Embodiment 2
In the present embodiment, a kind of method that agitating friction under water prepares large scale fine grain magnesium alloy plate：From as cast condition AZ61
Magnesium alloy plate is as original magnesium alloy plate to be processed 8, and the length of the magnesium alloy plate 8 to be processed is 180mm, width
For 165mm, be highly 8mm；It is processed using the mixing yoghurt equipment for being configured with cooling water tank 5, using normal temperature water cooling
But system, stirring-head 1 is the mixing needle with right-handed thread and three tangent planes and a diameter of 18mm of the shaft shoulder, is stirred under water using multi-pass
Friction processing method is treated processing magnesium alloy sheet material 8 and is processed, and the adjacent spacing between every time in the multi-pass is
3.5mm, is overlapped in the way of side skew of drawing back, large scale fine grain magnesium alloy plate is prepared under the pressure cooling condition of cooling water
Material.
The method that large scale fine grain magnesium alloy plate is prepared using agitating friction under water, is also comprised the following steps：
Step one：The magnesium alloy plate to be processed 8 prepared, is removed after oxide, alcohol washes using the polishing of 2000# sand paper
Dried up, then lain on smooth steel plate 2, and jig 3 is fixed in clamp jig 4；Step 2：Supporting
There is installation stirring-head 1 in the mixing yoghurt equipment of cooling water tank 5, first preliminary operation preheating, then debugs processing technology before processing
Parameter, working process parameter include initial coordinate, the direction of rotation of stirring-head 1, rotary speed, pace, processing distance, push
Amount and the angle of inclination between mixing needle and vertical, the wherein direction of rotation of stirring-head 1 are reversion, and rotary speed is
1400rpm, pace is 60mm/min, and angle of inclination is 2.5 ° between mixing needle and vertical；Step 3：From water inlet
6 with 43 ± 2mL/s flow velocity to cooling water tank 5 inject cooling water until water level reach magnesium alloy plate surface above 5mm to be processed,
The shaft shoulder and web contact position are sprayed to using cooling water simultaneously, accelerate cooldown rate, while opening discharge outlet 7, is kept in water tank
Cooling water circulation flows, and keeps water level to be in above magnesium alloy plate at 5mm；Step 4：According to adding that the step 2 is set
Work technological parameter carries out the first passage mixing yoghurt under water；Step 5：Complete after the processing of the first passage, stirring-head 1 is returned to
First passage initial position, vertical direction of the back pass along machine direction draw back side skew 3.5mm position and with it is upper
A time identical working process parameter processes back pass；Step 6：According to step 5, adding for follow-up 25 passage is continued to complete
Work process, prepares large scale fine grain magnesium alloy plate.The surface of large scale magnesium alloy plate prepared by the present embodiment is more
Smooth, non-nuclear density gauge is visible.Large scale magnesium alloy plate stirring area microstructure prepared by the present embodiment as shown in figure 3,
Its crystallite dimension is 15 μm, and it is thinner to prepare magnesium alloy crystal grain than normal agitation friction processing.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of agitating friction under water prepares the device of large scale fine grain magnesium alloy plate, it is characterised in that：Including being fixed in frame
Stirring-head and open top cooling water tank, jig is provided with cooling water tank, the height of the side wall of cooling water tank surpasses
The height of jig is crossed, jig is provided with two pressing articles through jig, and two pressing articles be arranged in parallel,
Jig is provided with several clamp jigs, and clamp jig pushes down pressing article, and stirring-head alignment jig simultaneously can be in weldering
Connect and move in the range of platform.
2. the device of large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 1
It is：Jig is provided with smooth steel plate.
3. the device of large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 1
It is：Stirring-head is the mixing needle with right-handed thread and three tangent planes.
4. the device of large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 3
It is：The length of mixing needle is 5mm, and the root diameter (RD) of stirring-head is 7mm.
5. the device of large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 1
It is：Cooling water tank is provided with water inlet and discharge outlet, and the connecting line of water inlet and discharge outlet passes through jig.
6. a kind of device using described in 1 to 5 any one method that agitating friction prepares large scale fine grain magnesium alloy plate under water,
It is characterized in that：In the multi-pass mixing yoghurt system for forcing to use superposition rate to be less than 100% under cooling condition of cooling water
Standby large scale fine grain magnesium alloy plate, multi-pass mixing yoghurt process is completed under cooling water.
7. the method for large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 6
It is：Adjacent spacing between every time in multi-pass is 3.5mm, is overlapped in the way of side skew of drawing back.
8. the method for large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 6
It is：Specifically include following steps,
Step one：Prepare magnesium alloy plate to be processed, oxide is removed using sand paper polishing, dried up with after alcohol washes, then
Lie on smooth steel plate, jig is fixed in clamp jig；
Step 2：Stirring-head is installed in the mixing yoghurt equipment for being configured with cooling water tank, first preliminary operation preheating before processing, so
Post debugging working process parameter, working process parameter include initial coordinate, stirring-head direction of rotation, rotary speed, pace,
Angle of inclination between processing distance, volume under pressure and mixing needle and vertical；
Step 3：Cooling water is injected from water inlet to cooling water tank more than water level reaches magnesium alloy plate surface to be processed, together
Shi Caiyong cooling waters spray to the shaft shoulder and web contact position, accelerate cooldown rate, while opening discharge outlet, keep cooling down in water tank
Water circulation flows, and keeps water level to be in above magnesium alloy plate.
Step 4：The first passage mixing yoghurt under water is carried out according to step 2.
Step 5：Complete after the processing of the first passage, stirring-head returns to the first passage initial position, back pass is along machine direction
Vertical direction draw back side skew 3.5mm position processing back pass；
Step 6：According to step 5, the manufacturing procedure of follow-up n passages (n >=3) is continued to complete, the conjunction of large scale fine grain magnesium is prepared
Golden plate material.
9. the method for large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 8
It is：Wherein the direction of rotation of stirring-head is reversion, and rotary speed is 1000~1400rpm, and pace is 60mm/min, is stirred
It is 2.5 ° to mix angle of inclination between pin and vertical.
10. the method for large scale fine grain magnesium alloy plate, its feature are prepared according to a kind of agitating friction under water described in claim 8
It is：Cooling water is injected up to water level reaches magnesium alloy plate to be processed to cooling water tank from water inlet with 43 ± 2mL/s flow velocity
Water level is kept to be in above magnesium alloy plate at 5mm in surface above 5mm, process.
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| CN111069761A (en) * | 2020-01-07 | 2020-04-28 | 太原理工大学 | Method and device for preparing high-entropy alloy particle-reinforced fine-grain aluminum-based composite material |
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