CN105970130A - Method for manufacturing fine-grain magnesium alloy through alternate inverted extrusion - Google Patents
Method for manufacturing fine-grain magnesium alloy through alternate inverted extrusion Download PDFInfo
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- CN105970130A CN105970130A CN201610375749.3A CN201610375749A CN105970130A CN 105970130 A CN105970130 A CN 105970130A CN 201610375749 A CN201610375749 A CN 201610375749A CN 105970130 A CN105970130 A CN 105970130A
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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
Abstract
The invention discloses a method for manufacturing a fine-grain magnesium alloy through alternate inverted extrusion and belongs to the technical field of magnesium alloy processing. The method includes the steps that a magnesium alloy cylindrical bar is obtained through cutting; secondly, the bar is heated; thirdly, a die is preheated; fourthly, alternate inverted extrusion is conducted, wherein the magnesium alloy cylindrical bar is subjected to 3-6 passes of inverted extrusion, and a magnesium alloy deformation part is manufactured; the operation sequences of all passes of inverted extrusion are the same; one time of blank remelting heating is conducted between every two adjacent passes of inverted extrusion, and a blank is overturned to be subjected to the next pass of inverted extrusion; and in the first time of inverted extrusion, the magnesium alloy cylindrical bar is placed at the bottom of a female die, a center male die descends and is then unloaded, and then a hollow male die descends; and fifthly, the final pass of forging is conducted, wherein the center male die and the hollow male die descend to conduct extrusion at the same time, and the fine-grain magnesium alloy is obtained. According to the method, the fine-grain magnesium alloy with the manufacturing strength and plasticity obviously improved and with the average grain size being smaller than 10 microns is manufactured through alternate inverted extrusion; and equipment is simple, cost is low, efficiency is high, operation is easy, and industrialization is achieved.
Description
Technical field
The invention belongs to Magnesium alloy AZ91D field, particularly to a kind of method that alternately thin grained magnesium alloy is prepared in backward extrusion.
Background technology
Magnesium alloy, as advanced light-weight metal structural material, possesses high specific strength and good impact resistance, can meet Aero-Space,
Automobile and electronic product lightweight requirements, reduce energy resource consumption and environmental pollution, it has also become American-European, Japan and other countries and area work
Industry applies one of fastest-rising material.But it is poor that the lattice structure of close-packed hexagonal determines magnesium alloy temperature-room type plasticity deformability,
Strongly limit its range of application, crystal grain refinement can not only be effectively improved magnesium alloy temperature-room type plasticity, and can significantly improve its anti-corruption
Erosion property and fatigue behaviour.Utilize solid-state deformation particularly severe plastic deformation processing method (SPD) to obtain thin grained magnesium alloy to open up
One new approach.Thus include high pressure torsion, ply rolling, multiway forging, lateral compression (ECAP) etc. a series of prepare thin
The new technique of grained magnesium alloy has obtained certain research.The thin grained magnesium alloy that but these several technology produce what is common is that size is relatively
Little, and easily crack, such as taking the lateral compression (ECAP) being most widely used, the Ultra-fine Grained produced at present
Scantling length is less than 200mm, diameter or elongated less than 15mm.Chinese patent in disclosed Shanghai Communications University: a kind of
In the preparation method (application number: 201210451142.0) of thin grained magnesium alloy, applicant carries for the problem of Cracking of lateral compression
Go out to add back pressure preparation method, the method reduced sample cracking tendency, but specimen size is 12mm × 12mm × 90mm, system
Standby thin grained magnesium alloy block is less.Chinese patent disclosed in another " preparation method of a kind of thin grained magnesium alloy block (application number:
201410365927.5) describe in " and utilize hot pressed sintering magnesium alloy powder granule legal system detailed information grained magnesium alloy, prepared crystal grain
Being smaller in size than 10 microns, the length of side is the thin grained magnesium alloy cube of 50mm, but the method process is complex, and pressure sintering obtains
Thin grained magnesium alloy block size, consistency and crystal grain refinement limited.The thin grained magnesium alloy method block size of preparation is relative at present
Less, and equipment and complex process, energy consumption is high, limits the further application of magnesium alloy.
Summary of the invention
Be difficult to the shortcoming prepared for above-mentioned existing thin grained magnesium alloy block, the present invention provides a kind of thin brilliant magnesium of alternately backward extrusion preparation
The method of alloy, is a kind of special manufacturing process being prepared thin grained magnesium alloy by alternately backward extrusion: utilize common extruding punch
And die, make magnesium alloy experience repeatedly severe plastic deformation thus Refining Mg Alloy crystal grain by alternately backward extrusion technology, squeeze anti-
Apply back pressure by non-active punch to deformable body outer end during pressure, make deformable body be in stronger three-dimensional compressive stress state, anti-
Crack arrest stricture of vagina produces；Improve magnesium alloy plastic deformation ability.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion of the present invention, comprises the steps:
Step 1, blanking:
By magnesium alloy, cut into magnesium alloy cylinder rod；
Step 2, bar heat treated:
By magnesium alloy cylinder rod, with programming rate 10～15 DEG C/s, it is heated to out crowded temperature 350～380 DEG C, is incubated 60～90min；
Step 3, mould preheats:
By central punch, hollow punch and die, it is preheated to 180～230 DEG C；Wherein, the outside dimension of cylinder rod is hollow
The outside dimension of punch, the height of cylinder rod: die depth=0.25～0.5, the internal diameter of the external diameter of central punch=hollow punch,
The external diameter of central punch: the external diameter=1:(2～3 of hollow punch), the external diameter of the external diameter=die of hollow punch；
Step 4, alternately backward extrusion:
By magnesium alloy cylinder rod, carry out the backward extrusion of 3～6 passages, prepare magnesium alloy deformation part；The operation of every time backward extrusion is suitable
Sequence is identical；Between every two passage backward extrusion, carry out a blank and melt down heating, upper and lower for blank turn-over is placed in female bottom and carries out
Lower a time backward extrusion；The extrusion speed of backward extrusion is than the extrusion speed reduction by 1～3mm/s of a front backward extrusion every time, each time
Blank melts down the temperature of heating and melts down the temperature reduction by 20～30 DEG C of heating than a front blank, and the time that each blank melts down heating is equal
Identical；Wherein, backward extrusion first, magnesium alloy cylinder rod is placed in female bottom, central punch is descending, squeezing of central punch
Pressure speed is 8～15mm/s, the Bottom Runby of central punch: the height=1:(2～5 of magnesium alloy cylinder rod), central punch unloads；
Then, hollow punch is descending, and the extrusion speed of hollow punch is 10～12mm/s, the Bottom Runby=central punch of hollow punch
Bottom Runby；Blank melts down the temperature of heating first is 300～350 DEG C, and it is 5～10min that blank melts down the time of heating；
Step 5, the forging of final passage:
By magnesium alloy deformation part, upper and lower reverse side is placed on female bottom, central punch and the most descending extruding of hollow punch, it is thus achieved that
Thin grained magnesium alloy；Wherein, central punch is identical with the extrusion speed of hollow punch, and is 1～2mm/s, central punch and sky
The Bottom Runby of cardiac prominence mould is identical, and is 3～5mm.
Wherein:
In described step 1, magnesium alloy is as cast condition or deformation states magnesium alloy ingot/bar.
In described step 1, the external diameter of described magnesium alloy cylinder rod is 60～100mm, and the height of cylinder rod is
30～50mm, die depth is 60～200mm；In described step 3, the external diameter of central punch is 30～50mm, hollow punch
Internal diameter be 30～50mm, the external diameter of hollow punch is 60～100mm, and the external diameter of die is 60～100mm；Described step 4
In, backward extrusion first, the Bottom Runby of central punch is 15～25mm.
In described step 2, heat treatment uses heating furnace.
In described step 3, preheating uses die heater.
In described step 4, blank melts down heating and uses heating furnace.
In described step 4, each backward extrusion process, blank experience severe plastic deformation, when central punch is descending, closes to magnesium
Gold blank edge applies the back pressure of 1～1.5kN, then, when hollow punch is descending, applies 1～1.5kN to magnesium alloy blank heart portion
Back pressure；Ensure that deformation process magnesium alloy blank is in stronger three-dimensional compressive stress state, it is possible to effectively reduce crack initiation probability,
Improve the Plastic Forming limit.
The present invention uses alternately backward extrusion method, utilizes the deformation of the violent shear plasticity in backward extrusion to realize the refinement of magnesium alloy block crystal grain,
Thus prepare thin grained magnesium alloy block.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion of the present invention, compared with prior art, has the beneficial effect that
(1) generic central punch, hollow punch and die is utilized to carry out the most anti-to as cast condition or deformation states magnesium alloy cylinder bar
Extruding so that it is be iteratively produced severe plastic deformation thus Refining Mg Alloy crystal grain, through totally 3 passage above backward extrusion deformation, can
To prepare the average grain size thin grained magnesium alloy material below 10 μm, compare additive method without special dies, easily
Operate and prepare larger-size thin grained magnesium alloy block materials, having expanded the range of application of thin grained magnesium alloy.
(2) realizing the inventive method equipment needed thereby is conventional hydraulic machine, it is not necessary to additional improvement device structure, and equipment is simple, becomes
This is low, and efficiency is high, easily operated, it is bigger to prepare thin grained magnesium alloy block size, it is achieved that industrialized production.
(3) the inventive method is in severe plastic deformation crystal grain thinning theoretical basis, utilizes common indirect-extrusion mould and hydraulic press
Magnesium alloy materials carrying out multi-pass replace backward extrusion plastic deformation and prepare thin grained magnesium alloy block materials, prepared thin brilliant magnesium closes
Gold intensity significantly improves with plasticity, and the Plastic Forming for follow-up magnesium alloy provides good condition, and the industry expanding thin grained magnesium alloy should
Use scope.
Accompanying drawing explanation
The process chart of the method for thin grained magnesium alloy is prepared in the alternately backward extrusion of Fig. 1 embodiment of the present invention；
The metallographic structure of the As-extruded AZ31 magnesium alloy rod of Fig. 2 embodiment of the present invention 1 step 1；
The metallographic structure of the thin grained magnesium alloy of Fig. 3 embodiment of the present invention 1 preparation.
Detailed description of the invention
Below in conjunction with concrete technology and case study on implementation, the concrete grammar of the present invention is illustrated, but is not limited to the present invention's
Scope.
The alternately backward extrusion of following example prepares the process chart of the method for thin grained magnesium alloy as shown in Figure 1.
Embodiment 1
A kind of method that alternately thin grained magnesium alloy is prepared in backward extrusion, comprises the steps:
Step 1, blanking:
By As-extruded AZ31 magnesium alloy rod, cut into magnesium alloy cylinder rod, wherein, described magnesium alloy cylinder rod
External diameter is 80mm, and the height of cylinder rod is 30mm；
Step 2, bar heat treated:
Magnesium alloy cylinder rod is inserted heating furnace, with 10 DEG C/s of programming rate, is heated to out crowded temperature 350 DEG C, is incubated 60min；
Step 3, mould preheats:
By central punch, hollow punch and die, insert die heater, be preheated to 200 DEG C；The wherein external diameter of central punch
For 40mm, the internal diameter of hollow punch is 30mm, and the external diameter of hollow punch is 80mm, and the external diameter of die is 80mm, die
The degree of depth is 100mm；
Step 4, alternately backward extrusion:
(1) first passage backward extrusion: central punch works, and operating rate is 10mm/s, descending 15mm, applies pressure to blank
1kN, makes heart portion metal flow to edge, experience severe plastic deformation for the first time, then heart portion punch unloading, and hollow punch works,
Operating rate is 10mm/s, descending 15mm, and blank is applied pressure 1kN, and edge metal flows to heart portion, and experience second time is acutely
Plastic deformation；
(2) blank melts down heating: blank a time backward extrusion terminated, and carries out melting down heating, and heating-up temperature is 320 DEG C, protects
The temperature time is 5min；
(3) second passage backward extrusion: put into after being overturn blank top and bottom in die, central punch works, operating rate
For 10mm/s, descending 15mm, blank being applied pressure 1kN, make heart portion metal flow to edge, experience third time acutely plasticity becomes
Shape, the then unloading of heart portion punch, hollow punch works, and operating rate is 8mm/s, descending 15mm, and blank is applied pressure 1kN,
Edge metal flows to heart portion, experiences the 4th severe plastic deformation；
(4) blank melts down heating: the blank two passage backward extrusion terminated, and carries out melting down heating, and heating-up temperature is 290 DEG C, protects
The temperature time is 5min；
(5) the 3rd passage backward extrusion: put into after being overturn blank top and bottom in die, central punch works, operating rate
For 6mm/s, descending 15mm, blank is applied pressure 1kN, make heart portion metal flow to edge, experience third time acutely plasticity
Deformation, the then unloading of heart portion punch, hollow punch works, and operating rate is 6mm/s, descending 15mm, and blank is applied pressure
Power 1kN, edge metal flows to heart portion, experiences the 4th severe plastic deformation；
Step 5, the forging of final passage:
By magnesium alloy deformation part, upper and lower reverse side is placed on female bottom, central punch and the most descending extruding of hollow punch, it is thus achieved that
Thin grained magnesium alloy；Wherein, central punch is identical with the extrusion speed of hollow punch, and is 1mm/s, central punch and hollow
The Bottom Runby of punch is identical, and is 4mm.
The metallographic structure of the As-extruded AZ31 magnesium alloy rod of the step 1 of the present embodiment is as in figure 2 it is shown, what step 5 was prepared
Carefully the metallographic structure of grained magnesium alloy is as it is shown on figure 3, as can be seen, the metallographic structure of original As-extruded AZ31 magnesium alloy rod
Average grain size is about 60.5 μm, after 3 passage extruding, and the crystalline substance of 99% area above in the metallographic structure of gained magnesium alloy block
Particle size is less than 10 μm, and average grain size is about 3.2 μm.
Embodiment 2
A kind of method that alternately thin grained magnesium alloy is prepared in backward extrusion, comprises the steps:
Step 1, blanking:
By as-cast magnesium alloy bar, cut into magnesium alloy cylinder rod；
Step 2, bar heat treated:
Magnesium alloy cylinder rod is inserted heating furnace, with 15 DEG C/s of programming rate, is heated to out crowded temperature 380 DEG C, is incubated 60min；
Step 3, mould preheats:
By central punch, hollow punch and die, insert die heater, be preheated to 230 DEG C；Wherein, described magnesium alloy
The external diameter of cylinder rod is 80mm, and the height of cylinder rod is 30mm, and the external diameter of central punch is 40mm, hollow punch
Internal diameter is 30mm, and the external diameter of hollow punch is 80mm, and the external diameter of die is 80mm, and die depth is 100mm；
Step 4, alternately backward extrusion:
(1) first passage backward extrusion: central punch works, and operating rate is 15mm/s, descending 10mm, applies pressure to blank
1.5kN, makes heart portion metal flow to edge, experience severe plastic deformation for the first time, then heart portion punch unloading, and hollow punch works,
Operating rate is 12mm/s, descending 10mm, and blank is applied pressure 1.5kN, and edge metal flows to heart portion, and experience second time is acute
Strong plastic deformation；
(2) blank melts down heating: blank a time backward extrusion terminated, and carries out melting down heating, and heating-up temperature is 350 DEG C, protects
The temperature time is 5min；
(3) second passage backward extrusion: put into after being overturn blank top and bottom in die, central punch works, operating rate
For 12mm/s, descending 10mm, blank being applied pressure 1kN, make heart portion metal flow to edge, experience third time acutely plasticity becomes
Shape, the then unloading of heart portion punch, hollow punch works, and operating rate is 10mm/s, descending 10mm, and blank is applied pressure
1kN, edge metal flows to heart portion, experiences the 4th severe plastic deformation；
(4) blank melts down heating: the blank two passage backward extrusion terminated, and carries out melting down heating, and heating-up temperature is 330 DEG C, protects
The temperature time is 5min；
(5) the 3rd passage backward extrusion: put into after being overturn blank top and bottom in die, central punch works, operating rate
For 9mm/s, descending 10mm, blank is applied pressure 1kN, make heart portion metal flow to edge, experience third time acutely plasticity
Deformation, the then unloading of heart portion punch, hollow punch works, and operating rate is 8mm/s, descending 10mm, and blank is applied pressure
Power 1kN, edge metal flows to heart portion, experiences the 4th severe plastic deformation；
Step 5, the forging of final passage:
By magnesium alloy deformation part, upper and lower reverse side is placed on female bottom, central punch and the most descending extruding of hollow punch, it is thus achieved that
Thin grained magnesium alloy；Wherein, central punch is identical with the extrusion speed of hollow punch, and is 2mm/s, central punch and hollow
The Bottom Runby of punch is identical, and is 5mm.
Embodiment 3
A kind of method that alternately thin grained magnesium alloy is prepared in backward extrusion, comprises the steps:
Step 1, blanking:
By as-cast magnesium alloy bar, cut into magnesium alloy cylinder rod；Wherein, the external diameter of magnesium alloy cylinder rod is 80mm,
The height of cylinder rod is 30mm,
Step 2, bar heat treated:
Magnesium alloy cylinder rod is inserted heating furnace, with 10 DEG C/s of programming rate, is heated to out crowded temperature 300 DEG C, is incubated 90min；
Step 3, mould preheats:
By central punch, hollow punch and die, insert die heater, be preheated to 180 DEG C；Wherein, outside central punch
Footpath is 40mm, and the internal diameter of hollow punch is 30mm, and the external diameter of hollow punch is 80mm, and the external diameter of die is 80mm, recessed
Molded Depth degree is 100mm；
Step 4, alternately backward extrusion:
(1) first passage backward extrusion: central punch works, and operating rate is 8mm/s, descending 6mm, applies pressure to blank
1.2kN, makes heart portion metal flow to edge, experience severe plastic deformation for the first time, then heart portion punch unloading, and hollow punch works,
Operating rate is 10mm/s, descending 6mm, and blank is applied pressure 1.2kN, and edge metal flows to heart portion, and experience second time is acute
Strong plastic deformation；
(2) blank melts down heating: blank a time backward extrusion terminated, and carries out melting down heating, and heating-up temperature is 275 DEG C, protects
The temperature time is 5min；
(3) second passage backward extrusion: put into after being overturn blank top and bottom in die, central punch works, operating rate
For 7mm/s, descending 25mm, blank being applied pressure 1kN, make heart portion metal flow to edge, experience third time acutely plasticity becomes
Shape, the then unloading of heart portion punch, hollow punch works, and operating rate is 9mm/s, descending 25mm, and blank is applied pressure 1kN,
Edge metal flows to heart portion, experiences the 4th severe plastic deformation；
(4) blank melts down heating: the blank two passage backward extrusion terminated, and carries out melting down heating, and heating-up temperature is 250 DEG C, protects
The temperature time is 5min；
(5) the 3rd passage backward extrusion: put into after being overturn blank top and bottom in die, central punch works, operating rate
For 6mm/s, descending 25mm, blank is applied pressure 1kN, make heart portion metal flow to edge, experience third time acutely plasticity
Deformation, the then unloading of heart portion punch, hollow punch works, and operating rate is 8mm/s, descending 25mm, and blank is applied pressure
Power 1kN, edge metal flows to heart portion, experiences the 4th severe plastic deformation；
Step 5, the forging of final passage:
By magnesium alloy deformation part, upper and lower reverse side is placed on female bottom, central punch and the most descending extruding of hollow punch, it is thus achieved that
Thin grained magnesium alloy；Wherein, central punch is identical with the extrusion speed of hollow punch, and is 1.5mm/s, central punch and sky
The Bottom Runby of cardiac prominence mould is identical, and is 3mm.
Claims (7)
1. the method that alternately thin grained magnesium alloy is prepared in backward extrusion, it is characterised in that comprise the steps:
Step 1, blanking:
By magnesium alloy, cut into magnesium alloy cylinder rod；
Step 2, bar heat treated:
By magnesium alloy cylinder rod, with programming rate 10～15 DEG C/s, it is heated to out crowded temperature 350～380 DEG C, is incubated 60～90min；
Step 3, mould preheats:
By central punch, hollow punch and die, it is preheated to 180～230 DEG C；Wherein, the outside dimension of cylinder rod is hollow
The outside dimension of punch, the height of cylinder rod: die depth=0.25～0.5, the internal diameter of the external diameter of central punch=hollow punch,
The external diameter of central punch: external diameter=1 of hollow punch: (2～3), the external diameter of the external diameter=die of hollow punch；
Step 4, alternately backward extrusion:
By magnesium alloy cylinder rod, carry out the backward extrusion of 3～6 passages, prepare magnesium alloy deformation part；The operation of every time backward extrusion is suitable
Sequence is identical；Between every two passage backward extrusion, carry out a blank and melt down heating, upper and lower for blank turn-over is placed in female bottom and carries out
Lower a time backward extrusion；The extrusion speed of backward extrusion is than the extrusion speed reduction by 1～3mm/s of a front backward extrusion every time, each time
Blank melts down the temperature of heating and melts down the temperature reduction by 20～30 DEG C of heating than a front blank, and the time that each blank melts down heating is equal
Identical；Wherein, backward extrusion first, magnesium alloy cylinder rod is placed in female bottom, central punch is descending, squeezing of central punch
Pressure speed is 8～15mm/s, the Bottom Runby of central punch: height=1 of magnesium alloy cylinder rod: (2～5), and central punch unloads；
Then, hollow punch is descending, and the extrusion speed of hollow punch is 10～12mm/s, the Bottom Runby=central punch of hollow punch
Bottom Runby；Blank melts down the temperature of heating first is 300～350 DEG C, and it is 5～10min that blank melts down the time of heating；
Step 5, the forging of final passage:
By magnesium alloy deformation part, upper and lower reverse side is placed on female bottom, central punch and the most descending extruding of hollow punch, it is thus achieved that
Thin grained magnesium alloy；Wherein, central punch is identical with the extrusion speed of hollow punch, and is 1～2mm/s, central punch and sky
The Bottom Runby of cardiac prominence mould is identical, and is 3～5mm.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion the most according to claim 1, it is characterised in that described step
In 1, magnesium alloy is as cast condition or deformation states magnesium alloy ingot/bar.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion the most according to claim 1, it is characterised in that described step 1
In, the external diameter of described magnesium alloy cylinder rod is 60～100mm, and the height of cylinder rod is 30～50mm, and die depth is
60～200mm；In described step 3, the external diameter of central punch is 30～50mm, and the internal diameter of hollow punch is 30～50mm, empty
The external diameter of cardiac prominence mould is 60～100mm, and the external diameter of die is 60～100mm；In described step 4, backward extrusion first, center
The Bottom Runby of punch is 15～25mm.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion the most according to claim 1, it is characterised in that described step 2
In, heat treatment uses heating furnace.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion the most according to claim 1, it is characterised in that described step 3
In, preheating uses die heater.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion the most according to claim 1, it is characterised in that described step 4
In, blank melts down heating and uses heating furnace.
The method that alternately thin grained magnesium alloy is prepared in backward extrusion the most according to claim 1, it is characterised in that described step
In 4, each backward extrusion process, blank experience severe plastic deformation, when central punch is descending, apply to magnesium alloy blank edge
The back pressure of 1～1.5kN, then, when hollow punch is descending, applies the back pressure of 1～1.5kN to magnesium alloy blank heart portion.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113635000A (en) * | 2021-08-27 | 2021-11-12 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN115365503A (en) * | 2022-07-25 | 2022-11-22 | 西安交通大学 | Preparation method of aluminum nitride reinforced aluminum alloy cylinder sleeve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794522A (en) * | 2019-03-27 | 2019-05-24 | 中国兵器工业第五九研究所 | A kind of preparation method of fine grain magnesium alloy right-angled trapezium part |
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| CN1672828A (en) * | 2005-04-19 | 2005-09-28 | 哈尔滨工业大学 | Reverse temperature field extrusion process for producing microcrystal magnesium alloy |
| CN101463454A (en) * | 2009-01-16 | 2009-06-24 | 中南大学 | Method for preparing bulk nano/superfine crystal grain magnesium alloy by twinning deformation |
| CN102266873A (en) * | 2011-07-12 | 2011-12-07 | 北京工业大学 | Two-stage backward extrusion device and extrusion method for Mg-Gd-Er-Zr alloy |
| CN102766832A (en) * | 2012-07-02 | 2012-11-07 | 太原理工大学 | Bidirectional reciprocating extrusion strengthening method for magnesium alloy blocks |
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- 2016-05-31 CN CN201610375749.3A patent/CN105970130B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672828A (en) * | 2005-04-19 | 2005-09-28 | 哈尔滨工业大学 | Reverse temperature field extrusion process for producing microcrystal magnesium alloy |
| CN101463454A (en) * | 2009-01-16 | 2009-06-24 | 中南大学 | Method for preparing bulk nano/superfine crystal grain magnesium alloy by twinning deformation |
| CN102266873A (en) * | 2011-07-12 | 2011-12-07 | 北京工业大学 | Two-stage backward extrusion device and extrusion method for Mg-Gd-Er-Zr alloy |
| CN102766832A (en) * | 2012-07-02 | 2012-11-07 | 太原理工大学 | Bidirectional reciprocating extrusion strengthening method for magnesium alloy blocks |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113635000A (en) * | 2021-08-27 | 2021-11-12 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN113635000B (en) * | 2021-08-27 | 2023-08-18 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN115365503A (en) * | 2022-07-25 | 2022-11-22 | 西安交通大学 | Preparation method of aluminum nitride reinforced aluminum alloy cylinder sleeve |
| CN115365503B (en) * | 2022-07-25 | 2023-08-01 | 西安交通大学 | Preparation method of aluminum nitride reinforced aluminum alloy cylinder sleeve |
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