CN108356273A - A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material - Google Patents
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material Download PDFInfo
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- CN108356273A CN108356273A CN201810420068.3A CN201810420068A CN108356273A CN 108356273 A CN108356273 A CN 108356273A CN 201810420068 A CN201810420068 A CN 201810420068A CN 108356273 A CN108356273 A CN 108356273A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material, the present invention relates to technical field of alloy material, and in particular to a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material.The invention solves the existing methods for preparing graphite particle/hypereutectic al-si composite material there are of high cost, complex process, and the technical problem of finished product wear-resisting property difference.Method：One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, ball milling；Two, it is pressed into preformed compact；Three, hot extrusion.Preparation method of the present invention is easy to operate, and equipment requirement is simple, and manufacturing cost is low and energy consumption is small.The quality of finished product good of the composite material, wearability are good.The present invention is used to prepare solid phase recycling graphite particle/hypereutectic al-si composite material.
Description
Technical field
The present invention relates to technical field of alloy material, and in particular to a kind of solid phase recycling graphite particle/hypereutectic al-si is multiple
The preparation method of condensation material.
Background technology
Transcocrystallized Al-Si alloy is higher due to silicone content so that alloy have preferable mobility and corrosion resistance, compared with
The advantages that high wear-resisting property, linear expansion coefficient and smaller coefficient of cubical expansion, is widely used in manufacture automobile engine and lives
Plug, cylinder and other wear-resisting spare parts, have a vast market foreground.Currently, with the propulsion of automotive light weight technology process and new
The rise of emerging industry, performance and the scope of application to alloy propose higher challenge, need to make transcocrystallized Al-Si alloy
More researchs.In the prior art, composite wood is prepared by Metamorphism treatment, ingredient regulation and control, control setting rate, addition reinforced phase
The modes such as material improve transcocrystallized Al-Si alloy wear-resisting property, and wherein reinforced phase is mostly SiC particulate, TiB particles, Al2O3Staple fiber,
Carbon nanotube.And currently, the method for preparing hypereutectic al-si composite material includes mainly 1. Pressure Infiltration fusion casting, 2. powder smelting
Jin Fa, 3. stirring casting method etc..1. fusion casting is that reinforced phase is added in molten metal bath, then pass through certain molding side
Formula obtains alloy, and wherein pressureless penetration method, centrifugation pressurization, stir casting etc. are all to make the abundant Dispersed precipitate of reinforced phase in gold
Belong to the mode in liquid.For example, child is big to prepare graphite flake/SiC enhancing ADC12 aluminum matrix composites by Pressure Infiltration fusion casting,
Gap is manufactured using different SiC and graphite flake ratio, (Tong Wei, Pressure Infiltration prepare graphite once pretty aluminium for carrying out molten aluminum infiltration
Based composites and its performance study, HeFei University of Technology, 2013)；Zhou Cong by Pressure Infiltration squeeze casting method prepare graphite/
Graphite is pressed into the prefabricated section in gap by A365 aluminum matrix composites first, and the A356 aluminium alloy melts of fusing are quickly poured
It injects in the mold for placing prefabricated section, then applies pressure rapidly, enable aluminum alloy to hole (Zhou Cong, the height of melt filling prefabricated section
Heat conduction, the design of low bulk aluminium graphite material, preparation and performance study, Shanghai Communications University, 2015).But the method energy
Consumption is high, and casting flaw is more, and the distribution of particles added is uneven, easy segregation.2. powder metallurgic method is will to enhance particle in advance
Mechanical mixture, then shaped dry hot pressing, the method that metal-base composites is made are carried out with metallic matrix powder.Xia Xin is adopted
Preparing SiC/CNTs with powder metallurgy process enhances silumin composite material, and preparing SiC/CNTs Al-Si by ball milling closes
Mixed powder is then supported composite material (the why strong high sial of Xia Xin, SiC/CNTs by golden mixed-powder by hot extrusion method
Alloy composite powder metallurgy Study on Preparation, Harbin Institute of Technology, 2012).The advantages of this method is prepared
Composite material reinforced phase is evenly distributed, and mechanical property is good, but to equipment requirement height, cost is also higher, limits shape of product.③
Stirring casting method is that reinforcement is added directly into parent metal melt, makes reinforcement by certain mechanically or electrically magnetic stirring
It is evenly dispersed in metal bath, is then cast into ingot casting.Temperature is added using by electroless copper carbon fiber in Bhavsingh etc.
The method for maintaining stirring casting in 730 DEG C ± 10 DEG C of aluminum metal melt is made short carbon fiber reinforced and recruits based composites
(Bhavsingh B,Balasubramanian M.Processing and properties of Copper-coated
carbon fibre reinforced aluminium alloy composites[J].Journal of Materials
Processing Technology,2009,209(4):2104-2110).This method technical process is simple, and manufacturing cost is cheap, but
It is that wherein reinforcement is not easy to be uniformly mixed with basis material.
So being badly in need of a kind of method of low cost, simple for process, good quality, it is used to prepare solid phase recycling graphite
Grain/hypereutectic al-si composite material.
Invention content
The invention solves the existing method for preparing graphite particle/hypereutectic al-si composite material, there are of high cost, techniques
Complexity, and the technical problem of finished product wear-resisting property difference, and a kind of solid phase recycling graphite particle/hypereutectic al-si composite material is provided
Preparation method.
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material, specifically carries out according to the following steps：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It it is 5~30 DEG C, 5~10h of ball milling obtains mixture；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Three, the preformed compact that step 2 obtains is heated to 300~500 DEG C, keeps the temperature 20~35min；It is then placed in mold
Hot extrusion is carried out, a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material is completed.
Wherein, the size that transcocrystallized Al-Si alloy is considered to be worth doing in step 1 is (0.01~10) mm × (0.01~5) mm × (0.01
~5) mm is conducive to the combination of ball milling stage and graphite particle；
Transcocrystallized Al-Si alloy bits and the mass ratio of graphite particle are (95~99.9): (0.1~5) in step 1；
Carried out under the conditions of protective gas when ball milling in step 1, protective gas be nitrogen or one kind in inert gas or
A variety of mixing；
It is carried out using planetary ball mill when ball milling in step 1, ball mill is high alumina ceramic ball grinder, and abrasive material is oxidation
Aluminium mill ball or zirconium oxide abrasive ball, the wherein volume ratio of alumina ceramic grinding ball and mixture are 1: (1~2)；
Cold-press process is in step 2：Squeeze pressure is 300~800MPa, and the dwell time is 30~60s；
Hot extrusion pressure pressure is 600~1200MPa in step 3, and extrusion ratio is (1~28): 1.
The beneficial effects of the invention are as follows：
Preparation method of the present invention is easy to operate, and equipment requirement is simple, and manufacturing cost is low and energy consumption is small.And the composite material at
Quality is good, and wearability is good.
The present invention is to prepare graphite particle/hypereutectic al-si composite material in the method that solid phase recycles, wherein with hypereutectic
Alusil alloy crumble is raw material, and transcocrystallized Al-Si alloy fines and graphite particle are carried out ball-milling treatment, then carry out cold compaction
The equally distributed aluminum matrix composite of graphite particle is obtained at preformed compact, then by hot extrusion.Graphite inherently has good
Greasy property is easily separated and slides relatively since the combination between the stratiform atomic plane of graphite is more loose, so addition graphite
The wear-resisting property of transcocrystallized Al-Si alloy can be enhanced.
In the present invention, transcocrystallized Al-Si alloy bits can be the scrap processed in industrial processes, and preparation method is grasped
Make simply, device simple largely reduces production cost.It is not related to melting during the solid phase recovery method of use
The case where handling, graphite particle avoided to be unevenly distributed.Solid phase recycling graphite particle/hypereutectic al-si prepared by the present invention is compound
Material wear-resistant performance improves at least 15% compared with existing transcocrystallized Al-Si alloy.
The present invention is used to prepare solid phase recycling graphite particle/hypereutectic al-si composite material.
Specific implementation mode
Technical solution of the present invention is not limited to the specific implementation mode of act set forth below, further include each specific implementation mode it
Between arbitrary combination.
Specific implementation mode one：A kind of system of solid phase recycling graphite particle/hypereutectic al-si composite material of present embodiment
Preparation Method specifically carries out according to the following steps：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It it is 5~30 DEG C, 5~10h of ball milling obtains mixture；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Three, the preformed compact that step 2 obtains is heated to 300~500 DEG C, keeps the temperature 20~35min；It is then placed in mold
Hot extrusion is carried out, a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material is completed.
Specific implementation mode two：The present embodiment is different from the first embodiment in that：Hypereutectic al-si in step 1
The size of alloy bits is (0.01~10) mm × (0.01~5) mm × (0.01~5) mm.It is other with one phase of specific implementation mode
Together.
The size of transcocrystallized Al-Si alloy bits is (0.01~10) mm × (0.01~5) mm × (0.01~5) mm, is conducive to
The combination in ball milling stage and graphite particle.
Specific implementation mode three：The present embodiment is different from the first and the second embodiment in that：Graphite in step 1
The grain size of grain is 0.01mm~0.45mm.It is other the same as one or two specific embodiments.
Specific implementation mode four：Unlike one of present embodiment and specific implementation mode one to three：Mistake in step 1
It is (95~99.9): (0.1~5) that cocrystallized Al-Si alloy, which is considered to be worth doing with the mass ratio of graphite particle,.It is other with specific implementation mode one to
One of three is identical.
Specific implementation mode five：Unlike one of present embodiment and specific implementation mode one to four：Ball in step 1
It is carried out under the conditions of protective gas when mill, protective gas is one or more mixing in nitrogen or inert gas.Other and tool
One of body embodiment one to four is identical.
Specific implementation mode six：Unlike one of present embodiment and specific implementation mode one to five：Ball in step 1
Mill speed is 500~2000r/min.It is other identical as one of specific implementation mode one to five.
Specific implementation mode seven：Unlike one of present embodiment and specific implementation mode one to six：Ball in step 1
It is carried out using planetary ball mill when mill, ball mill is high alumina ceramic ball grinder, and abrasive material is that alumina ceramic grinding ball or zirconium oxide are ground
The volume ratio of abrading-ball, wherein alumina ceramic grinding ball and mixture is 1: (1~2).One of other and specific implementation mode one to six
It is identical.
Specific implementation mode eight：Unlike one of present embodiment and specific implementation mode one to seven：Ball in step 1
Ball mill is agate jar when mill.It is other identical as one of specific implementation mode one to seven.
Specific implementation mode nine：Unlike one of present embodiment and specific implementation mode one to eight：It is cold in step 2
Pressure technique is：Squeeze pressure is 300~800MPa, and the dwell time is 30~60s.One of other and specific implementation mode one to eight
It is identical.
Specific implementation mode ten：Unlike one of present embodiment and specific implementation mode one to nine：Add in step 3
Thermal environment is protective gas environment, and protective gas is one or more mixing in nitrogen or inert gas.Other and specific reality
It is identical to apply one of mode one to nine.
Specific implementation mode 11：Unlike one of present embodiment and specific implementation mode one to ten：In step 3
Extrusion temperature is 300~400 DEG C.It is other identical as one of specific implementation mode one to ten.
Specific implementation mode 12：Present embodiment is unlike specific implementation mode one to one of 11：Step 3
Middle hot extrusion pressure pressure is 600~1200MPa, and extrusion ratio is (1~28): 1.It is other with one to one of 11 phase of specific implementation mode
Together.
Specific implementation mode 13：Present embodiment is unlike specific implementation mode one to one of 12：Step 3
The extrusion ratio of middle hot extrusion is (21~28): 1.It is other identical as specific implementation mode one to one of 12.
Specific implementation mode 14：Present embodiment is unlike specific implementation mode one to one of 13：Step
Hot extrusion speed is 10~100mm/s in three.It is other identical as specific implementation mode one to one of 13.
Beneficial effects of the present invention are verified using following embodiment：
Embodiment one：
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material of the present embodiment, is specifically pressed following
Step carries out：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It is 20 DEG C, ball milling speed 850r/min, ball milling 5h, and suspends 10min every 1h, obtains mixture；
Transcocrystallized Al-Si alloy bits are ZL117, and size is 5mm × 3mm × 0.5mm；The grain size of graphite particle is
0.045mm；
It being carried out under a nitrogen atmosphere when ball milling, ball mill uses high alumina ceramic ball grinder, and abrasive material is alumina ceramic grinding ball,
The volume ratio of middle alumina ceramic grinding ball and mixture is 1: 2；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Wherein, squeeze pressure 500MPa, dwell time 60s；
Three, the preformed compact that step 2 obtains is heated to 350 DEG C, keeps the temperature 30min；It is then placed in mold and carries out hot extrusion
Pressure completes a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material；
Wherein, hot extrusion speed be 50mm/s, extrusion ratio 25: 1, extrusion be a diameter of 8mm proximate matter.
Embodiment two：
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material of the present embodiment, is specifically pressed following
Step carries out：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It is 20 DEG C, ball milling speed 850r/min, ball milling 5h, and suspends 10min every 1h, obtains mixture；
Transcocrystallized Al-Si alloy bits are ZL117, and size is 5mm × 3mm × 0.5mm；The grain size of graphite particle is 0.1mm；
It being carried out under a nitrogen atmosphere when ball milling, ball mill uses high alumina ceramic ball grinder, and abrasive material is alumina ceramic grinding ball,
The volume ratio of middle alumina ceramic grinding ball and mixture is 1: 2；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Wherein, squeeze pressure 500MPa, dwell time 60s；
Three, the preformed compact that step 2 obtains is heated to 350 DEG C, keeps the temperature 30min；It is then placed in mold and carries out hot extrusion
Pressure completes a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material；
Wherein, hot extrusion speed is 50mm/s, extrusion ratio 25: 1.
Embodiment three：
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material of the present embodiment, is specifically pressed following
Step carries out：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It is 20 DEG C, ball milling speed 850r/min, ball milling 5h, and suspends 10min every 1h, obtains mixture；
Transcocrystallized Al-Si alloy bits are ZL117, and size is 3mm × 2mm × 0.1mm；The grain size of graphite particle is
0.045mm；
It being carried out under a nitrogen atmosphere when ball milling, ball mill uses high alumina ceramic ball grinder, and abrasive material is alumina ceramic grinding ball,
The volume ratio of middle alumina ceramic grinding ball and mixture is 1: 2；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Wherein, squeeze pressure 500MPa, dwell time 60s；
Three, the preformed compact that step 2 obtains is heated to 350 DEG C, keeps the temperature 30min；It is then placed in mold and carries out hot extrusion
Pressure completes a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material；
Wherein, hot extrusion speed is 50mm/s, extrusion ratio 25: 1.
Example IV：
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material of the present embodiment, is specifically pressed following
Step carries out：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It is 20 DEG C, ball milling speed 850r/min, ball milling 5h, and suspends 10min every 1h, obtains mixture；
Transcocrystallized Al-Si alloy bits are ZL117, and size is 5mm × 3mm × 0.5mm；The grain size of graphite particle is
0.045mm；
It being carried out under a nitrogen atmosphere when ball milling, ball mill uses high alumina ceramic ball grinder, and abrasive material is alumina ceramic grinding ball,
The volume ratio of middle alumina ceramic grinding ball and mixture is 1: 2；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Wherein, squeeze pressure 500MPa, dwell time 60s；
Three, the preformed compact that step 2 obtains is heated to 350 DEG C, keeps the temperature 30min；It is then placed in mold and carries out hot extrusion
Pressure completes a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material；
Wherein, hot extrusion speed is 50mm/s, extrusion ratio 12: 1.
Embodiment five：
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material of the present embodiment, is specifically pressed following
Step carries out：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It is 20 DEG C, ball milling speed 850r/min, ball milling 5h, and suspends 10min every 1h, obtains mixture；
Transcocrystallized Al-Si alloy bits are A390, and size is 5mm × 3mm × 0.5mm；The grain size of graphite particle is 0.045mm；
It being carried out under a nitrogen atmosphere when ball milling, ball mill uses high alumina ceramic ball grinder, and abrasive material is alumina ceramic grinding ball,
The volume ratio of middle alumina ceramic grinding ball and mixture is 1: 2；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Wherein, squeeze pressure 500MPa, dwell time 60s；
Three, the preformed compact that step 2 obtains is heated to 350 DEG C, keeps the temperature 30min；It is then placed in mold and carries out hot extrusion
Pressure completes a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material；
Wherein, hot extrusion speed is 50mm/s, extrusion ratio 25: 1.
Embodiment six：
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material of the present embodiment, is specifically pressed following
Step carries out：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, control temperature
It is 20 DEG C, ball milling speed 1000r/min, ball milling 5h, and suspends 10min every 1h, obtains mixture；
Transcocrystallized Al-Si alloy bits are A390, and size is 5mm × 3mm × 0.5mm；The grain size of graphite particle is 0.085mm；
It being carried out under a nitrogen atmosphere when ball milling, ball mill uses high alumina ceramic ball grinder, and abrasive material is alumina ceramic grinding ball,
The volume ratio of middle alumina ceramic grinding ball and mixture is 1: 1；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Wherein, squeeze pressure 600MPa, dwell time 60s；
Three, the preformed compact that step 2 obtains is heated to 400 DEG C, keeps the temperature 30min；It is then placed in mold and carries out hot extrusion
Pressure completes a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material；
Wherein, hot extrusion speed be 50mm/s, extrusion ratio 25: 1, extrusion be a diameter of 8mm proximate matter.
Abrasion test is carried out using solid phase recycling graphite particle/hypereutectic al-si composite material made from the present embodiment：
Solid phase recycling graphite particle/hypereutectic al-si composite material made from the present embodiment is used as experiment material
The raw material of ZL117, A390 transcocrystallized Al-Si alloy scrap --- ZL117, A390 that namely market is bought in the present embodiment
Transcocrystallized Al-Si alloy material as a contrast carries out experiment material and control material real on friction wear testing machine respectively
It tests, then detects wear extent respectively；
The pressure 100N of friction wear testing machine；
Moment of friction 30N.m；
Rotating speed 350r/min；
Fraction time 120min.
Detection learns, the wear extent lower than the wear extent of control material 15% of experiment material, that is to say, that utilizes this implementation
Example manufacturing method made from graphite particle/hypereutectic al-si composite material compared with original ZL117 transcocrystallized Al-Si alloys,
Wearability improves 15%.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material, it is characterised in that this method is specific
It carries out according to the following steps：
One, transcocrystallized Al-Si alloy is considered to be worth doing and is mixed with graphite particle, obtained mixture, be put into ball mill, controlled at 5~
30 DEG C, 5~10h of ball milling obtains mixture；
Two, the mixture that step 1 obtains is put into mold, then by being pressed into preformed compact；
Three, the preformed compact that step 2 obtains is heated to 300~500 DEG C, keeps the temperature 20~35min；It is then placed in mold and carries out
A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material is completed in hot extrusion.
2. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that the size that transcocrystallized Al-Si alloy is considered to be worth doing in step 1 is (0.01~10) mm × (0.01~5) mm × (0.01~5)
mm。
3. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that the grain size of graphite particle in step 1 is 0.01mm~0.45mm.
4. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that in step 1 that transcocrystallized Al-Si alloy bits and the mass ratio of graphite particle are (95~99.9): (0.1~5).
5. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
Be characterized in that carrying out under the conditions of protective gas when ball milling in step 1, protective gas be nitrogen or one kind in inert gas or
A variety of mixing.
6. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that in step 1 that ball milling speed is 500~2000r/min.
7. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that in step 2 that cold-press process is：Squeeze pressure is 300~800MPa, and the dwell time is 30~60s.
8. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that in step 3 that hot extrusion pressure pressure is 600~1200MPa, extrusion ratio is (1~28): 1.
9. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that in step 3 that heating environment is protective gas environment, protective gas is one or more in nitrogen or inert gas
Mixing.
10. a kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material according to claim 1,
It is characterized in that hot extrusion speed is 10~100mm/s in step 3.
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| CN201810420068.3A CN108356273A (en) | 2018-05-04 | 2018-05-04 | A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material |
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| CN201810420068.3A Pending CN108356273A (en) | 2018-05-04 | 2018-05-04 | A kind of preparation method of solid phase recycling graphite particle/hypereutectic al-si composite material |
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