CN1151920A - Composite liquid metal processing technology and equipment - Google Patents
Composite liquid metal processing technology and equipment Download PDFInfo
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- CN1151920A CN1151920A CN 96113139 CN96113139A CN1151920A CN 1151920 A CN1151920 A CN 1151920A CN 96113139 CN96113139 CN 96113139 CN 96113139 A CN96113139 A CN 96113139A CN 1151920 A CN1151920 A CN 1151920A
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Abstract
The said equipment consists of controlled feeding system, centrifugal particle accelerating system, dispersive gas-burning heating system and circular casting system. Through the processes of selection of base material and particle type; determination of composite ratio, particle size, heating temp, casting temp and the speed of particles jetted into liquid metal; particle feeding, particle speeding and heating, and casting composition, composite metal particle-reinforced casting material is produced. The present invention may be also used in purifying, alloying, inoculation, nodulizing, etc. of metal liquid.
Description
Composite liquid metal processing technology and device are to be used to produce technology and the device that various metal-base particles strengthen casting composite materials (endogenetic particle or add particle).Also be in metallurgical, the Foundry Production liquid towards metal purify, alloying, breed, nodularization, rotten new installation, the new technology of handling.
Particulate reinforced composite is because of having the favor that incomparable multiple property such as wear-resisting, heat-resisting, anti-corrosion of single-material and extensive applicability obtain people day by day.Therefore, Chinese scholars has been carried out number of research projects to it, confirms that it has the unusual wide application prospect and the extremely powerful market competitiveness.
Existing comparatively sophisticated method of producing particulate reinforced composite is powder metallurgic method (solid phase method).But this method program is various, complex process, the production cycle is long, equipment is huge, cost an arm and a leg, and can only the production small parts, and practical application is very limited.
Except that solid phase method, also have liquid phase method, as the jet spread method, centrifugal casting, rheocasting methods etc. are produced the method for particulate reinforced composite.These methods are in various degree the certain shortcoming and defect of existence all.As: Japanese Chang Gu river justice adopts jet spread method research metal-base particles to strengthen casting composite material.The blowing device in the similar metallurgical industry is adopted in test, is carrier with the argon gas, ceramic particle is ejected on the metal liquid stream of cast.Because the restriction of nebulizer gas pressure and appointed condition, particle is compound than little (quantity is lacked), is not easy that even dispersion distributes in matrix, and the technological operation complexity is difficult to stable control, and particle scatters and disappears serious, can't accurate quantification, and contaminate environment.Because particle is to add at normal temperatures, so wettability is bad, can only partly improve the wettability between particle and matrix by the disperse control element that adds costliness, therefore, being everlasting tiny crack occurs at the interface and damages the performance of material.Rotary casting recombining process (clear 57-118849) is that particle and liquid metal are injected whizzer, utilizes both difference in specific gravity, under action of centrifugal force, particle is distributed along the cast(ing) surface layer.This technology is only applicable to turn round the class foundry goods, can only form very thin surface composite layer, and equipment is huge, and the power charge height also exists particle and matrix wettability poor, in conjunction with not firm, and shortcomings such as skewness.Rheocasting method (Compocasting or rheocasting) utilizes liquid metal under the violent stirring effect, even reaching 40～50%, the solid phase amount still has more low viscous rheology principle, enhanced granule joined in the semi-solid-state metal stir, then cast or casting forming.This method equipment complexity, technological operation are very strict, and it is air-breathing to be easy to oxidation, causes subsurface defect, can only be used for the lower aluminium alloy of fusing point and other non-ferrous metal products at present.Other oozes as casting, infiltration, and molten bath stirring or the like is all the same with aforesaid method, has the following weakness that is difficult for overcoming respectively; (1) particle is difficult to the disperse uniform distribution in matrix, and the poly-partially and come-up of part is arranged; (2) particle adds under room temperature state, and there is the absorption of gas and moisture on the surface, need carry out pre-treatment, and is poor with the matrix wettability, in conjunction with not firm, is easy to gather partially, peel off; (3) have very big energy difference and physics, chemical incompatibility between particle and matrix, the stress of generation causes the appearance of fine crack, the grievous injury material property; (4) equipment is huge, complicated or do not have equipment, and the control difficulty can't accurate quantification and stably manufactured.
The objective of the invention is to overcome existing technology and device above shortcomings, a kind of technology and device are provided, simple in structure, have multi-functionally, can obtain the novel liquid metal composite treatment process and the device of the matrix material of excellent properties.
Realize that above-mentioned purpose technical scheme accompanying drawings is as follows: the liquid metal recombining process is to be made of following steps:
A. select basic material and particulate type;
B. definite compound ratio, particulate granularity, add-on, teeming temperature and particle are injected needed critical velocity in the liquid metal;
C. particle is carried at regular time and quantity;
D. the particle centrifugation accelerates heats particle dispersion simultaneously;
E. it is compound to encircle the outstanding casting of waterfall;
Said a, two steps of b are to select to determine according to working condition and performance requriements that parts use, d goes on foot said particle centrifugation accelerates and is meant that particle is under centrifugal action, penetrate with the radial ringwise disperse of the speed of injecting the required critical velocity of liquid metal matrix greater than particle, particulate disperse heating is meant and diffusing particle stream annular heat band at an angle, to the heating rapidly of diffusing particle stream, e goes on foot the compound liquid metal that is meant of the outstanding casting of said ring waterfall with under the annular waterfall shape vertical current, grain flow is surrounded therebetween, make grain flow and liquid stream two rings bump at an angle, finish recombination process.
Above-mentioned said particle is carried at regular time and quantity, is meant in recombination process, and the quantity and the time of feed can be controlled and regulate to feeder system at any time, and regulates centrifugal acceleration, and it is compound to carry out integral body, and the part is compound, and surface recombination and gradient are compound.
Being used to finish the required liquid metal composite handling arrangement of above-mentioned technology is made up of controlled feeding system, particle centrifugation accelerates system, combustion gas disperse heating system, the ring outstanding casting of waterfall gating system.The pellet supply system is by hopper (1), feed sleeve pipe (17) and material feeder (2) are formed, material feeder (2) is contained in hopper (1) and fixedly between the gland (3) of feed sleeve pipe (17), it is driven by the motor (20) of adjustable speed, and control feeding coal, particle centrifugation accelerates system is made up of tubular shaft (9) and acceleration dish (11), tubular shaft (9) is by bearing gland (18), bearing (19) and fixed support (13) pass through belt, belt pulley (5) drives rotation, but level penetrates the acceleration dish (11) of annular diffusing particle stream and is contained in tubular shaft (9) lower end, combustion gas disperse heating system is by source of the gas, control valve and ring heater (6) are formed, it is contained in acceleration dish (11) top, the ring outstanding casting of waterfall gating system is by auxiliary sandbox (15) and dress sand mold (23) and combination core (21) within it, (22) form, the bottom of sand mold (23) is the mixing and reaction chamber (12) of particle and liquid metal, the bottom of this chamber is provided with the outlet of joining with casting mold cast gate or casting ladle, the top of this chamber is by combination core (21), (22) ring cavity of Gou Chenging reaches the sprue cup (14) that communicates with ring cavity, the ring cavity bottom has the narrow annular channel that forms liquid metal waterfall, the acceleration dish (11) of tubular shaft end and ring heater (6) insert mixing and reaction chamber (12) through the centre hole of combination core (22), and outstanding its top that is contained in.
The inner chamber of acceleration dish (11) can be star or scroll, and there is the circular cone of a projection at the center of its bottom, and acceleration dish (11) sidewall circumference and astroid or helical intersection have several holes.
In order to guarantee the composite effect of particle and liquid metal, mixing and reaction chamber (12) are provided with the exhaust passage (24) that communicates with atmosphere.
In order to control the flow of liquid metal, the cross-sectional area of the narrow annular channel bottom the ring cavity of combination core (21), (22) formation is adjustable.
Further specify technique scheme of the present invention below in conjunction with accompanying drawing.At first, select basic material, particulate kind, granularity, compound ratio, particulate Heating temperature and inject the needed critical velocity of matrix metal liquid according to the applying working condition condition and the performance requriements of parts; Determine cast recombination time, particle consumption and delivery rate according to weight, thickness and the compound ratio of parts again.The particle of some amount and granularity (can be various particles such as ceramic particle, alloying element, nucleating agent, alterant); be input to evenly, continuously in the disk accelerator (1) through feeder system; under the accelerator centrifugal action of high speed rotating; particle obtains enough kinetic energy (its speed is above injecting the required critical velocity of matrix liquid metal) and penetrates at a high speed, forms the diffusing particle stream (27) of horizontal radiation shape annular spread.Disk accelerator (11) is provided with annular fuel gas well heater (6), the oxy-acetylene thermal-flame (neutral flame or the reducing flame that penetrate at a certain angle in the well heater, also can select other combustion gas or electrically heated as required for use) tightly surround annular diffusing particle stream (27), form annular heat band (26), make the particle speedup of under disperse state, heating, to obtain enough kinetic energy and heat energy. meanwhile, the matrix liquid metal is through gating system ringwise under waterfall shape (25) vertical current, the horizontal annular diffusing particle stream (27) that the disk accelerator is penetrated is enclosed in middle, two annulars are solid, liquid stream (it is vertical to be generally 90 ° of angles) at an angle bumps against, and injects in the liquid metal that flows downward with making the continuous disperse of particle that has enough heat energy and kinetic energy.The matrix metal melt is held under the arm and is being wrapped up in the particle that even dispersion distributes therebetween and inject casting mold rapidly, promptly obtains needed particle after solidifying and strengthens casting composite material.If change the particulate kind, can make in-situ endogenic respectively and add particulate composite.By control feed quantity and joining day, can reach purposes such as integral body is compound, the part is compound, gradient is compound respectively.In addition, also available this kind processing method and device carry out molten metal purification, alloying, breed, nodularization, rotten processing etc.Both can save the consumption of alloy and treatment agent in a large number, improve the speed of response and the recovery rate of treatment agent, also can prevent to handle decline or inefficacy, improve treatment effect greatly, realize accurate quantification.
Positively effect of the present invention mainly comes out by four feature instantiations of this technology:
1. centrifugation accelerates: size, the number of rotating speed, radius and particle exit wound of bullet by adjusting material feeder and disk accelerator, can control particulate issuing velocity and compounding quantity accurately and stably.And need not any gas be carrier, only force in particle itself, make particle obtain enough kinetic energy after, continuously, inject in the matrix metal liquid to disperse, created best dynamic conditions for particle is compound.
2. disperse heating: particle heats under disperse state could be realized being rapidly heated, and can avoid agglomeration of particles caking under the high temperature, make the water evaporates of particle surface absorption, desorbing gas is removed impurity, improves condition of surface, reduced the temperature head between particle and matrix, wetting angle is reduced, improved wettability, avoided all kinds of subsurface defects that cause because of energy difference and various uncompatibility.Simultaneously, the annular flame that well heater penetrates can heat, improve the particle surface state for molten metal and particle heating, also can be the particle speedup, and the restriction particle scatters and disappears, thereby is the compound optimal heat mechanical condition of having created of particle.
3. the outstanding casting of ring waterfall: the liquid metal under the annular waterfall shape vertical current surrounds the particle that the horizontal annular disperse is penetrated, two rings intersect bump, increase the contact area of particle and matrix liquid metal to greatest extent, compound ratio of bigger particle and even dispersion degree both can have been guaranteed, can prevent that again particle scatters and disappears and contaminate environment, compound enhancing and casting forming are once finished in casting process, simple and practical, created optimum process condition for particle is compound.
4. controlled feed:
The quantity of feed and time can be controlled and be regulated at any time by special feeding system in the composite casting process, thereby realize whole compound, local compound, surface recombination and the compound purpose of gradient neatly.
In a word, technology of the present invention is applied widely, effect stability; Device is made simple, small volume and less weight, and processing ease, control is accurately.Adopt this technology and device, can solve existing technology and the insoluble problem of device effectively, can obtain gratifying liquid metal Combined Processing effect.
Below in conjunction with the description of drawings embodiments of the invention:
Fig. 1 is the staple skeleton diagram of composite liquid metal processing technology; Fig. 2 is the outstanding casting of a ring waterfall recombining process schematic diagram; Fig. 3 is a liquid metal composite handling arrangement structural representation; Fig. 4 is centrifugation accelerates system and controlled feeding system structural representation; Fig. 5 is the top plan view that acceleration dish (11) adopts star structure among Fig. 4; Fig. 6 is the structural representation of the outstanding casting of ring waterfall gating system; Fig. 7 is the vertical view of Fig. 6; Fig. 8 is the structural representation of combustion heater (6); Fig. 9 is the vertical view of Fig. 8.Among the figure: (1) is hopper, (2) be material feeder, hopper (1) is contained on the material feeder (2), and (3) are the sleeve pipe glands, it is fixed on the exit of material feeder (2) with feed sleeve pipe (17), and tubular shaft (9) is sleeved on the feed sleeve pipe (17) by bearing (19).Tubular shaft (7) drives its rotation by belt and belt pulley (5).(6) be ring heater (what adopt is the combustion gas ring heater herein), it is contained in acceleration dish (11) top, and is fixed on the bearing support (4).(8) be the troffer that is fixed on the frame (3).(10) be tumbler pin.Whole controlled feeding system, particle centrifugation accelerates system, combustion gas disperse heating system all are contained in above the frame (13), and are positioned on the troffer (8) and can be slided up and down by fixed copper (10).Acceleration dish (11) is contained in the lower end of tubular shaft (9), and rotates with tubular shaft, and the inner chamber of acceleration dish (1l) is star or scroll, and its periphery is provided with a plurality of apertures.The particle that is fed in the acceleration dish (11) by feed sleeve pipe (17) penetrates the grain flow (27) that forms horizontal disperse by aperture under the rotary centrifugal force effect, (12) are reaction chambers, and (13) are the sail framves, and (14) are sprue cups.(15) be auxiliary sandbox.(16) be auxiliary sandbox slideway, (17) are the feed sleeve pipes, and (18) are the bearing small cups.(19) be bearing, (20) are the motors of control material feeder (2) of speed of can steplessly withering, and (21), (22) they are the combination cores. they are contained in the top of reaction chamber and constitute ring cavity.Liquid metal is introduced by sprue cup (14) is tangential.Have a through hole in the middle of the combination core (22).Tubular shaft (9) and acceleration dish (11) and well heater (6) insert thus and are suspended in the reaction chamber (12), (23) be sand mold, (24) be the exhaust-duct, (25) are by the liquid metal annular waterfall stream that flows in the ring cavity that makes up core (22), (23) formation in the reaction chamber (12).(26) be the annular heat band that sprays by ring heater.(27) be grain flow.Core of the present invention is that the particle of accurately controlling to section's amount through material feeder (2) forms annular particles stream after selecting by the technical factor of Fig. 1 under centrifugal action.Simultaneously to its rapid disperse heating.Annular grain flow and liquid metal annular waterfall stream (26) is bumped against, and it is compound to finish the outstanding casting of ring waterfall.
Embodiment (one): the compound impact breaker bar of gradient
Performance requriements: high speed rotating bears certain impact and abrasive particle meals damage during bar work, requires the enough De Toughness of You and certain wear resistance, and traditional material is that ZGMnl3 carries out the tough processing of water, and is safe and reliable, but wear resistance is not high.
Present design: adopt 35CrMnSiMo to do matrix, compound adding Cr-C-Fe, Ti-Fe, V-Fe particle comes the main abrading section of the compound enhancing base of gradient, compounding quantity is 3% of a bar weight 1/2nd, concrete parameter is determined as follows: four gross weight 112kg of the every case of bar during casting, 16 seconds durations of pouring.1580 ℃ of teeming temperatures.Add grain amount: the linear velocity that 112 * 0.5 * 3%=1.6Skg set composite provides is 6.78M/s, according to
The critical diameter of trying to achieve particle intrusion molten steel is about:
Cr—C—Fe：d＝0.286mm，Ti—Fe：d＝0.402mm，V—Fe：d＝0.281mm
Get each grain graininess and be 0.3～0.5mm, composition proportion is:
Cr-C-Fe:Ti-Fe:V-Fe=3: 1: l (adding micro-ferro-boron) recombination time is 8 seconds. feed rate was reduced to zero gradually from 0.42kg/g in 8 second time, cast back bar is through thermal treatment: 900 ℃ are air-cooled.250 ℃ of tempering, its microstructure and property is as follows: position structure property wear side martensite+alloy carbide (on a small quantity) HRC56～47 α
k=2l～72J/cm
2Position, middle part perlite+martensite HRC46～16 α
k=70～120J/cm
2Non-wear-resisting perlite+ferrite HRCl5～17 α
k〉=15J/cm
2Annotate: α
kValue is all found some amount bainite in wear side and zone of transition for the non-notch sample during structure observation
Result of use: every group three packaged on highway stone factory impact breaker, and broken material is a basalt, granularity 30～50mm, crushing 553M
3
The average crushing of former water high-ductility high manganese steel bar is 216M
3, that is: be 2.56 times of former Mn13 bar the work-ing life of the compound bar of gradient.
Embodiment (two) " local compound palate crusher palate plate "
The heavy 95kg of palate plate size and weight: decide plate: 400 * 635 * 70mm
The heavy 125kg of moving plate: 400 * 725 * 70mm
Tooth depth is 25mm, and original material is ZGMn13, the tough processing of water.The design adopts iron alloy that the rotten molten manganese steel of not thermal treatment chooses carbide forming element Nb, V, Ti, Cr as matrix as enhanced granule, and the critical diameter that each particle was invaded molten steel when the linear velocity that provides when set composite was 6.78M/S is calculated as follows:
Alloy density (g/cm
3) critical diameter (mm) composition proportion
Fe-Cr-C 6.94(60％Cr) 0.287 4
V-Fe 7.0(40％V) 0.283 1
Nb-Fe 7.4(50％Nb) 0.249 1
Ti-Fe 6.0 (20%Ti) 0.406 1 is so the granularity of various alloying pellets is all elected 0.3～0.5mm as.Complex intensifying palate plate bottom is about 1/3rd of thickness of slab.The particle add-on is respectively decides plate
Moving plate:
The duration of pouring: decided plate 14 seconds, moving plate 18 seconds
Recombination time: decided plate 5 seconds, moving plate 6 seconds
Delivery rate: decide plate 0.25kg/s, moving plate 0.275kg/s
Composite effect: top is single austenite HRC13, toughness α
k＞150J/cm
2, the bottom is austenite+alloyed cementite+alloy carbide HRC38.5, α
k=37.5J/cm
2
Service condition:
Claims (7)
1. composite liquid metal processing technology is characterized in that being made of following steps:
A. select basic material and particulate type;
B. definite compound ratio, particulate granularity, add-on, teeming temperature and particle are injected critical velocity required in the liquid metal (if fixed speed then has a correspondence＜critical particle granularity)
C. particle is carried at regular time and quantity;
D. the particle centrifugation accelerates heats particle dispersion simultaneously;
E. it is compound to encircle the outstanding casting of waterfall;
Said a, two steps of b are to select to determine according to working condition and performance requriements that parts use, d goes on foot said particle centrifugation accelerates and is meant that particle is under centrifugal action, penetrate to inject the radial ringwise disperse of the required critical velocity of liquid metal matrix greater than particle, particulate disperse heating is meant and diffusing particle stream annular heat band at an angle, diffusing particle stream is heated rapidly, e goes on foot the compound liquid metal matrix that is meant of the outstanding casting of said ring waterfall with under the annular waterfall shape vertical current, grain flow is surrounded therebetween, grain flow and metal liquid stream two rings are clashed at an angle finish recombination process.
2. by the described composite liquid metal processing technology of claim 1, the said particle of its feature is carried at regular time and quantity, be meant in recombination process, the quantity and the time of feed can be controlled and regulate to feeder system at any time, and conciliation centrifugal acceleration, it is compound to carry out integral body, and local compound, surface recombination and gradient are compound.
3. the device that is used for the described liquid metal Combined Processing of claim 1, it is characterized in that by controlled feeding system, particle centrifugation accelerates system, combustion gas disperse heating system, the outstanding casting of ring waterfall gating system is formed, the pellet supply system is by hopper (1), feed sleeve pipe (17) and material feeder (2) are formed, material feeder (2) is contained between hopper (1) and the feed sleeve pipe (17), it is driven by the motor (20) of adjustable speed, and control feeding coal, particle centrifugation accelerates system is made up of tubular shaft (9) and acceleration dish (11), tubular shaft (9) is sleeved on the feed sleeve pipe (17) by bearing (19) and the bearing support (4) that is fixed on the support, and drive rotation by belt and belt pulley by motor (7), but level (also can at an angle) penetrates the acceleration dish (11) of annular diffusing particle stream and is contained in tubular shaft (9) lower end, combustion gas disperse heating system is by source of the gas, control valve and ring heater (6) are formed, it is contained in acceleration dish (11) top, ring waterfall gating system is by auxiliary sandbox (15) and dress sand mold (23) and combination core (21) within it, (22) form, the bottom of sand mold (23) is the mixing and reaction chamber (12) of particle and liquid metal, the bottom of this chamber is provided with the outlet of joining with casting mold cast gate or casting ladle, the top of this chamber is by combination core (21), (22) ring cavity of Gou Chenging reaches the sprue cup (14) that communicates with ring cavity, the ring cavity bottom has the annular mouth (narrow slit) that forms liquid metal waterfall, the acceleration dish (11) of tubular shaft end and ring heater (6) insert mixing and reaction chamber (12) through the centre hole of combination core (22), and outstanding its top that is contained in.
4. by the described multi-functional liquid metal treatment unit of claim 1, it is characterized in that said acceleration dish (11) inner chamber is star or scroll, there is the circular cone of a projection in bottom centre, and acceleration dish (11) sidewall circumference and astroid or helical intersection have several holes.
5. by claim 1 or 2 described multi-functional liquid metal treatment unit, it is characterized in that having a plurality of holes of penetrating to the side-lower width of cloth on the tube wall of ring heater (6).
6. by the described multi-functional liquid metal treatment unit of claim 1, it is characterized in that mixing and reaction chamber (12) is provided with the exhaust passage (24) that communicates with atmosphere.
7. by the described multi-functional liquid metal treatment unit of claim 1, it is characterized in that the cross-sectional area of the annular mouth (narrow slit) bottom the ring cavity of combination core (21), (22) formation is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96113139A CN1063371C (en) | 1996-09-26 | 1996-09-26 | Composite liquid metal processing technology and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96113139A CN1063371C (en) | 1996-09-26 | 1996-09-26 | Composite liquid metal processing technology and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151920A true CN1151920A (en) | 1997-06-18 |
| CN1063371C CN1063371C (en) | 2001-03-21 |
Family
ID=5121756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96113139A Expired - Fee Related CN1063371C (en) | 1996-09-26 | 1996-09-26 | Composite liquid metal processing technology and equipment |
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| Country | Link |
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| CN (1) | CN1063371C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057643A (en) * | 2015-08-13 | 2015-11-18 | 合肥熠辉轻合金科技有限公司 | Device and method for preparing semi-solid metal by rotating vertical straight pipe channel |
| CN106735024A (en) * | 2016-12-30 | 2017-05-31 | 苏州有色金属研究院有限公司 | Prepare aluminum matrix composite semi-continuous casting device |
| CN109763014A (en) * | 2019-01-10 | 2019-05-17 | 上海交通大学 | A kind of method of micro-nano granules enhancing metal-base composites |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5933066A (en) * | 1982-08-17 | 1984-02-22 | Kubota Ltd | Production device of hollow cylindrical composite casting |
| CN1091158A (en) * | 1993-02-17 | 1994-08-24 | 邱庆荣 | Liquid compound quick solidifying composite material manufacturing process and equipment |
-
1996
- 1996-09-26 CN CN96113139A patent/CN1063371C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057643A (en) * | 2015-08-13 | 2015-11-18 | 合肥熠辉轻合金科技有限公司 | Device and method for preparing semi-solid metal by rotating vertical straight pipe channel |
| CN106735024A (en) * | 2016-12-30 | 2017-05-31 | 苏州有色金属研究院有限公司 | Prepare aluminum matrix composite semi-continuous casting device |
| CN109763014A (en) * | 2019-01-10 | 2019-05-17 | 上海交通大学 | A kind of method of micro-nano granules enhancing metal-base composites |
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| Publication number | Publication date |
|---|---|
| CN1063371C (en) | 2001-03-21 |
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