CN105665722A - Preparing method for free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix aluminum oxide magnetic abrasive - Google Patents
Preparing method for free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix aluminum oxide magnetic abrasive Download PDFInfo
- Publication number
- CN105665722A CN105665722A CN201610043105.4A CN201610043105A CN105665722A CN 105665722 A CN105665722 A CN 105665722A CN 201610043105 A CN201610043105 A CN 201610043105A CN 105665722 A CN105665722 A CN 105665722A
- Authority
- CN
- China
- Prior art keywords
- abrasive
- water
- magnetic abrasive
- nozzle
- aluminum oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
Abstract
The invention provides a preparing method for free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix aluminum oxide magnetic abrasive. The method is characterized in that aluminum oxide powder is adopted as hard abrasive of the magnetic abrasive, and an alloy composed of iron, silicon, aluminum and copper is adopted as a metal matrix material; upper and lower dual-layer free-falling nozzles are adopted as nozzles, the upper layer free-falling nozzle is a low-pressure mixed powder flow jetting nozzle, and the lower layer free-falling nozzle is a high-pressure gas flow nozzle; water cooling is adopted as a cooling manner, and by adjusting the height of the water level of cooling water in an atomizing and water cooling chamber, the cooling speed of molten metal drops containing aluminum oxide abrasive is controlled, so that the magnetic abrasive with the aluminum oxide abrasive distributed on the shallow layer of the surface of a magnetic abrasive metal matrix is formed; and a spiral mixed powder conveying device is adopted for conveying mixed powder, so that flow of the aluminum oxide abrasive is controlled precisely. According to the metal matrix aluminum oxide magnetic abrasive prepared from the method, aluminum oxide and the metal matrix are combined firmly, the magnetic abrasive has high magnetic abrasive performance, the production technology process is controlled in a programmed manner, the product performance is stable, and the method is suitable for scale production.
Description
Technical field
The present invention provides the mixed powder aerosolization water-cooled of a kind of free-falling twin nipple solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, belongs to the preparing technical field of matrix material.
Background technology
From materialogy angle, magnetic abrasive is a kind of matrix material, i.e. iron base enhanced type composite material, forms mutually with abrasive particle primarily of ferromagnetic phase. Ferromagnetic phase requires to have good magnetic diffusivity and electroconductibility, and common used material is straight iron powder or iron(-)base powder. Abrasive particle is a kind of particulate matter with higher hardness, strength and stability having grinding, grinding and polishing action concurrently mutually, and common used material has corundum, aluminum oxide, silicon nitride, silicon carbide etc. The chemical composition of magnetic abrasive and proportioning thereof and structure are the key factors determining magnetic abrasive performance, and this just requires to keep being combined closely between ferromagnetic phase and abrasive particle are mutually, and to be had suitable granularity, in addition it is also necessary to have a kind of suitable preparation method.
In prior art, the preparation method of magnetic abrasive has a variety of, and they can be divided into three classes substantially: mechanical mixing, matrix material method, reactive casting method.
Mechanical mixing is by the Homogeneous phase mixing at normal temperatures by a certain percentage such as ferromagnetic powder, abrasive powders and lapping liquid, directly carries out the method for attrition process. The ferromagnetic powder of conventional certain particle size and abrasive powders are as after Al2O3, SiC, Cr2O3, TiC etc. mix, then add tackiness agent such as oleic acid, polyethylene glycol, silica gel etc. and make. This kind of method can make multiple magnetic abrasive, and preparation technology is simple, and cost is low, but during grinding, abrasive grain is easier to be separated with magnetic powder ratio and disperses, and mill efficiency is low, limits range of application.
From the angle of materialogy, magnetic abrasive is a kind of composite powder, i.e. iron-based grains enhanced type composite material powder. It is the heterogeneous material being made up by certain recombining process of two or more material, and its performance is obviously better than starting material in particular aspects. Along with the development of matrix material, the technology of preparing of magnetic abrasive have also been obtained corresponding development, and its preparation technology has many kinds, mainly contains sintering process, mull technique, composite deposite method etc.
Sintering process is that current magnetic abrasive prepares the most frequently used method. In Japan, the method has successfully been applied in suitability for industrialized production. Difference according to concrete sintering condition, it is divided into again normal pressure-sintered, hot pressed sintering, laser sintered, microwave sintering etc. Due to processing characteristics and the work-ing life of magnetic abrasive, certainly it is taken at the bonding strength of abrasive particle phase with ferromagnetic phase to a great extent. Magnetic abrasive prepared by sintering process, has the abrasive material phase of considerable part in mechanical disintegration, screening process and ferromagnetic is separated, and causes ferromagnetic phase to combine with abrasive particle decrease in intensity, and durability declines.
Mull technique is divided into inorganic bond and organic adhesive according to the difference of selected binding agent, it is that certain proportion, the ferromagnetic powder mixed and abrasive powders binding agent are bonded together, then solidify, then mechanical disintegration, screening, make varigrained magnetic abrasive powder. Magnetic abrasive prepared by mull technique, owing to not needing briquetting in advance, it is not necessary to the equipment such as electric furnace containing rare gas element, laser machine, and therefore the method technique is simple, it is easy to realizing, cost is lower. But tissue is loose, and in conjunction with poor, density is low, poor heat stability, and abrasive particle easily comes off mutually, and the life-span is shorter. And when temperature is higher, the magnetic abrasive of bonding makes the surface one-tenth furvous of processing, the easy contaminated damage of original finished surface.
The method of composite deposite method composite plating or composite electroless-plating, evenly is mingled with certain abrasive grain in metal plating, and the special coating formed is composite deposite. Compound plating technology is applied in the technology of preparing of magnetic abrasive, through development for many years, composite deposite method oneself be successfully applied in many sciemtifec and technical spheres, but production cost is higher, batch production is difficult to realize, plating liquid is dealt with improperly and also can be caused environmental pollution.
Its principle of reactive casting method is under certain condition, by element and element or the chemical reaction between element and compound, the ceramic enhancement phase of one or more high strength of fabricated in situ in human body, after obtaining the alloy containing ceramic enhancement phase, reheat fusing and under high pressure it is blow molded into powder. Low and wherein the hard abrasive grain of content that the current Problems existing of reactive casting method is ceramic hard abrasive material in magnetic abrasive is also restive.
Plasma spraying method, is iron-based powder and hard abrasive grain are pre-mixed by a certain percentage after evenly, is placed in the raw material powder feed room of plasma spraying equipment. In the vacuum chamber of plasma spray injection device, to applying high frequency discharge voltage between two electrodes, produce plasma jet flame by plasma generator. Constantly being injected in plasma flame by the raw material powder mixed, plasma flame temperature can reach the high temperature of 5000 ~ 10000 DEG C, raw material powder is constantly fused into microlayer model, then cools, is frozen into spherical magnetic abrasive particle simultaneously. Although this kind of method solves the problem of iron base phase with abrasive material phase poor compatibility, but magnetic abrasive prepared by the method is due to the high temperature action by plasma flame, the sharp cutting edge of abrasive particle phase is passivated, its mill efficiency is caused significantly to reduce, the magnetic abrasive that its mill capacity is even prepared less than other simple methods.
At present, the main Problems existing of magnetic abrasive finishing skin processing be that the magnetic abrasive life-span is low, the cutting power of metal is poor, preparation difficulty and cost height. The backwardness of magnetic abrasive Study on Preparation Technology, has become the bottleneck problem of restriction magnetic abrasive finishing skin processing technology further genralrlization application (as free curved surface grinds skin processing). For this reason, the present inventor has invented " preparation method of pneumatic atomizing rapid condensation magnetic abrasive material " (ZL201010206408.6), " equipment for preparing atomized quick-setting magnetic abrasive " (ZL201110156753.8), the structural form control method of magnetic abrasive " the pneumatic atomizing rapid condensation method prepare " (ZL201110156741.5), and achieve good effect in practice, but also there is the key technical problem that some affect magnetic abrasive preparation quality, as:
(1) ejector nozzle problem: owing to being adopt single nozzle, Dual-Phrase Distribution of Gas olid jet velocity height, causes the quick erosive wear of ejector nozzle, and loses efficacy in the extremely short time, the preparation afunction of magnetic abrasive;Simultaneously still owing to being the single nozzle of employing, hard abrasive material together with high pressure gas as atomizing medium, if Dual-Phrase Distribution of Gas olid jet speed is low, atomizing effect is not good, magnetic abrasive particle is thick, if but Dual-Phrase Distribution of Gas olid jet speed height, although although magnetic abrasive particle diameter reduces, but because hard abrasive material can splash after entering molten metal again, causing the hard abrasive material contained in magnetic abrasive metallic matrix to be die-offed, magnetic abrasive machining performance significantly reduces.
(2) the erosive wear problem of molten metal thrust-augmenting nozzle: the atomizing type adopting tight coupling, before molten metal bath stream is atomized, first Dual-Phrase Distribution of Gas olid is ejected into the bottom of molten metal thrust-augmenting nozzle, cause and in the molten metal thrust-augmenting nozzle bottom short period of time, produce serious erosive wear, and cause molten metal and high pressure gas to return the danger of spray along molten metal thrust-augmenting nozzle.
(3) the condensing rate control problem of liquid magnetic abrasive drop: owing to not solving the accurate control problem of condensing rate of molten state magnetic abrasive drop, the depth distribution of its hard abrasive material of magnetic abrasive of preparation in metallic matrix is always unstable, directly affecting the mill capacity of magnetic abrasive, scrap rate is higher.
(4) the content control problem of hard abrasive material in magnetic abrasive: strength send mixed powder device owing to being difficult to accurately control the flow of hard abrasive material in Dual-Phrase Distribution of Gas olid, causes that the content of hard abrasive material in magnetic abrasive is unstable, the unstable properties of magnetic abrasive.
(5) the erosive wear problem of molten metal thrust-augmenting nozzle: the atomizing type adopting tight coupling, before molten metal bath stream is atomized, first Dual-Phrase Distribution of Gas olid is ejected into the bottom of molten metal thrust-augmenting nozzle, cause and in the molten metal thrust-augmenting nozzle bottom short period of time, produce serious erosive wear, and cause molten metal and high pressure gas to return the danger of spray along molten metal thrust-augmenting nozzle.
Summary of the invention
It is an object of the invention to provide a kind of can overcome above-mentioned defect, manufacturing process simple, prepare the magnetic abrasive bonding strength and mill efficiency is all more satisfactory, be conducive to realizing the magnetic abrasive preparation method of batch production. Its technical scheme is:
The mixed powder aerosolization water-cooled of a kind of free-falling twin nipple solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, it is characterised in that: the hard abrasive material of magnetic abrasive adopts alumina powder, and metal_based material is iron, silicon, aluminium, copper four kinds of elementary composition alloys; Nozzle adopts double-deck free-falling nozzle up and down, free-falling nozzle in upper strata is the mixed powder ejector nozzle of low pressure, what it sprayed is the mixed powder jet of the low-pressure inert gas containing alumina abrasive, effect breaks through the surface tension of metal liquid stream in downflow processes to be injected in metal liquid stream by alumina abrasive, but is not atomized by metal liquid stream; Lower floor's free-falling nozzle is high pressure draft nozzle, and what it sprayed is high speed inert gas, and effect is atomized by the metal liquid stream being mixed with alumina abrasive so that it is atomization becomes the molten drop being mixed with alumina abrasive; The type of cooling is water-cooled: by regulating water coolant at the elevation of water surface of atomization water-cooled room, thus control contains the flying distance of alumina abrasive molten drop in atomization water-cooled room, and then control contains the speed of cooling of alumina abrasive molten drop, thus form the magnetic abrasive that alumina abrasive distributes at magnetic abrasive metal matrix body surface shallow-layer; Send mixed powder to have employed spiral and send mixed powder device, it is achieved that in the mixed powder jet of low-pressure inert gas, alumina abrasive flow accurately and conveniently controls so that the stable content of alumina abrasive in magnetic abrasive.
For realizing goal of the invention, the mixed powder aerosolization water-cooled of free-falling twin nipple solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, the preparation of metal matrix aluminum oxide magnetic abrasive comprises the steps:
1) in alumina abrasive tank (26), load the alumina abrasive of set amount and screw alumina abrasive tank lid (25);
2) metal_based material iron, silicon, aluminium, copper add electric furnace in regulation ratio, are heated to molten state and reach the superheating temperature of regulation;
3) open cold valves (6) and regulate the water level of water coolant (37) in atomization water-cooled room (36) to reach the height of regulation;
4) gas in gas blower (12), suction atomization water-cooled room (36) is opened;
5) open connect high-pressure nitrogen bottle 1(13) and high pressure draft nozzle (34) between air valve 1(16) and be adjusted to the stream pressure of regulation, and will be atomized in water-cooled room (36) and be full of nitrogen so that the metal aerosolization that will carry out is placed in the atmosphere of nitrogen completely;
6) open connect high-pressure nitrogen bottle 2(14) mix the air valve 2(15 between powder ejector nozzle (33) with low pressure) and be adjusted to the stream pressure of regulation;
7) start helix transporting device (24) and control powder feed rate by processing requirement;
8) molten metal in electric furnace (30) is evenly poured in insulation crucible (31), and keep regulation liquid level, until the molten metal in electric furnace (30) is to the greatest extent;
9), after molten metal all flows to end in insulation crucible (31), close helix transporting device (24), air valve 1(16 in order), air valve 2(15), gas blower (12);
10) closing gate valve (5) makes atomization water-cooled room (36) and magnetic abrasive fill with closed between (39), opening water drain valve (1) makes magnetic abrasive fill with the outflow of the water in (39), opening press filtration air valve (4) makes high pressure gas enter in the inner chamber that magnetic abrasive fills with (39), magnetic abrasive is blocked in the upper chamber that magnetic abrasive fills with (39) by filter screen (2), and water wherein is forced to extrude;
11) magnetic abrasive is filled with (39) to take off, take out magnetic abrasive wherein, through vacuum-drying, screening and packaging, thus obtain varigrained magnetic abrasive.
Compared with prior art, tool has the following advantages in the present invention:
1, owing to have employed the double-deck free-falling nozzle of high low pressure, its effect of upper strata free-falling nozzle is that alumina abrasive is injected in metal liquid stream by the surface tension breaking through metal liquid stream in downflow processes, but metal liquid stream is not atomized, its effect of upper strata free-falling nozzle is atomized by the metal liquid stream being mixed with alumina abrasive, it is made to be atomized the molten drop becoming and being mixed with alumina abrasive, the mixing of injecting of metal liquid stream alumina abrasive is effectively separated by the method with atomization, avoid the alumina abrasive splashing that single nozzle atomization causes, waste and magnetic abrasive granular size are uneven, the uneven problem of alumina abrasive content, ensure that magnetic abrasive granular size, the homogeneity of magnetic abrasive alumina abrasive content and controllability.
2, metal liquid stream is not atomized the alumina abrasive stream pressure thus sprayed due to upper strata free-falling nozzle low, efficiently solves containing alumina abrasive the problem of the erosive wear of nozzle.
3, owing to have employed free-falling nozzle, molten metal thrust-augmenting nozzle is positioned at the top of two nozzles, the air-flow of two nozzle ejections does not directly act on the bottom of metal thrust-augmenting nozzle, avoid tight coupling mode nozzle and contain the erosive wear that metal thrust-augmenting nozzle is serious of the high velocity air of hard abrasive material, it also avoid the upper spray problem of molten metal backflow because metal liquid stream conduit erosive wear causes simultaneously.
4, in metal_based material, add metallic copper, effectively improve the bonding strength of metal_based material and alumina abrasive particle in magnetic abrasive.
5, have employed the type of cooling that water-cooled is coagulated soon, solve alumina abrasive particle in magnetic abrasive to dissociate from metallic matrix and go out and a difficult problem for depth distributed controll, the table shallow-layer of magnetic abrasive can be distributed in by controlled oxidization aluminium abrasive material, make magnetic abrasive permeability height, the mill capacity of preparation strong, significantly reduce the distance that mixed flour gold belongs to droplet flight simultaneously, the free-falling atomization water-cooled room reduced and the whole height of equipment, reduce cost.
6, have employed spiral and send mixed powder device, solve the problem sending mixed powder device to be difficult to accurately control hard abrasive material flow in Dual-Phrase Distribution of Gas olid so that the stable content of hard abrasive material in magnetic abrasive.
7, adding of silicon in water-cooled is coagulated soon Cooling Mode and metal_based material, aluminium, copper, the bonding strength between metal_based material and alumina abrasive is increased.
8, the technological process that the present invention prepares magnetic abrasive can realize automatization, stable and reliable for performance, is suitable for the scale production of high-performance metal base aluminum oxide magnetic abrasive.
Accompanying drawing explanation
Fig. 1 is the mixed powder aerosolization water-cooled of the free-falling twin nipple solidifying metal matrix aluminum oxide magnetic abrasive Preparation equipment schematic diagram soon that the present invention adopts, wherein: 1-water drain valve, 2-filter screen, 3-magnetic abrasive, 4-press filtration air valve, 5-gate valve, 6-cold valves, 7-water-sealed tank body, 8-water seal water, 9-water intaking valve, 10-intake valve, 11-inlet pipe, 12-water shoot, 13-high-pressure nitrogen bottle 1, 14-high-pressure nitrogen bottle 2, 15-air valve 2, 16-air valve 1, 17-spiral send mixed powder device, 18-tracheae 3, 19-tracheae 1, 20-weather gage 1, 21-weather gage 2, 22-tracheae 2, 23-tracheae 4, 24-helix transporting device, 25-alumina abrasive tank lid, 26-alumina abrasive tank, 27-hard abrasive material, 28-mixes powder tracheae, 29-molten metal, 30-electric furnace, 31-is incubated crucible, 32-molten metal thrust-augmenting nozzle, 33-low pressure mixes powder ejector nozzle, 34-high pressure draft nozzle, 35-water level gauge, 36-is atomized water-cooled room, 37-water coolant, 38-is atomized water-cooled room housing, 39-magnetic abrasive tank, 40-filtered water, 41-two-nozzle atomization water cooling plant, 42-suction dust collecting device, 43-gas blower, 44-gas station.
Embodiment
Embodiment 1
The preparation of metal matrix aluminum oxide magnetic abrasive comprises the steps:
1) in alumina abrasive tank (26), load the alumina abrasive of set amount and screw alumina abrasive tank lid (25);
2) metal_based material presses iron: silicon: aluminium: copper=83%:9%:6%:2% part by weight, adds heating by electric cooker and to molten state and reaches the superheating temperature of regulation;
3) open cold valves (6) and regulate the water level of water coolant (37) in atomization water-cooled room (36) to reach the height of regulation;
4) gas in gas blower (12), suction atomization water-cooled room (36) is opened;
5) open connect high-pressure nitrogen bottle 1(13) and high pressure draft nozzle (34) between air valve 1(16) and be adjusted to the stream pressure of regulation, and will be atomized in water-cooled room (36) and be full of nitrogen so that the metal aerosolization that will carry out is placed in the atmosphere of nitrogen completely;
6) open connect high-pressure nitrogen bottle 2(14) mix the air valve 2(15 between powder ejector nozzle (33) with low pressure) and be adjusted to the stream pressure of regulation;
7) start helix transporting device (24) and control powder feed rate by processing requirement;
8) molten metal in electric furnace (30) is evenly poured in insulation crucible (31), and keep regulation liquid level, until the molten metal in electric furnace (30) is to the greatest extent;
9), after molten metal all flows to end in insulation crucible (31), close helix transporting device (24), air valve 1(16 in order), air valve 2(15), gas blower (12);
10) closing gate valve (5) makes atomization water-cooled room (36) and magnetic abrasive fill with closed between (39), opening water drain valve (1) makes magnetic abrasive fill with the outflow of the water in (39), opening press filtration air valve (4) makes high pressure gas enter in the inner chamber that magnetic abrasive fills with (39), magnetic abrasive is blocked in the upper chamber that magnetic abrasive fills with (39) by filter screen (2), and water wherein is forced to extrude;
11) magnetic abrasive is filled with (39) to take off, take out magnetic abrasive wherein, through vacuum-drying, screening and packaging, thus obtain varigrained magnetic abrasive.
Claims (4)
1. the mixed powder aerosolization water-cooled of free-falling twin nipple solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, it is characterised in that: the hard abrasive material of magnetic abrasive adopts alumina powder, and metal_based material is iron, silicon, aluminium, copper four kinds of elementary composition alloys; Nozzle adopts double-deck free-falling nozzle up and down, free-falling nozzle in upper strata is the mixed powder ejector nozzle of low pressure, what it sprayed is the mixed powder jet of the low-pressure inert gas containing alumina abrasive, effect breaks through the surface tension of metal liquid stream in downflow processes to be injected in metal liquid stream by alumina abrasive, but is not atomized by metal liquid stream; Lower floor's free-falling nozzle is high pressure draft nozzle, and what it sprayed is high speed inert gas, and effect is atomized by the metal liquid stream being mixed with alumina abrasive so that it is atomization becomes the molten drop being mixed with alumina abrasive; The type of cooling is water-cooled: by regulating water coolant at the elevation of water surface of atomization water-cooled room, thus control contains the flying distance of alumina abrasive molten drop in atomization water-cooled room, and then control contains the speed of cooling of alumina abrasive molten drop, thus form the magnetic abrasive that alumina abrasive distributes at magnetic abrasive metal matrix body surface shallow-layer; Send mixed powder to have employed spiral and send mixed powder device, it is achieved that in the mixed powder jet of low-pressure inert gas, alumina abrasive flow accurately and conveniently controls so that the stable content of alumina abrasive in magnetic abrasive.
2. the mixed powder aerosolization water-cooled of free-falling twin nipple according to claim 1 solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, it is characterized in that: adding of silicon in the Cooling Mode that water-cooled is coagulated soon and metal_based material, aluminium, copper, increase the bonding strength between metal_based material and alumina abrasive.
3. the mixed powder aerosolization water-cooled of free-falling twin nipple according to claim 1 solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, it is characterized in that: the type of cooling is water-cooled, by regulating water coolant at the elevation of water surface of atomization water-cooled room, thus control contains the flying distance of alumina abrasive molten drop in atomization water-cooled room, and then control contains the speed of cooling of alumina abrasive molten drop, thus form the magnetic abrasive that alumina abrasive distributes at magnetic abrasive metal matrix body surface shallow-layer, improve magnetic diffusivity and the mill capacity of magnetic abrasive, reduce length and the equipment whole height of atomization water-cooled room, reduce equipment cost.
4. the mixed powder aerosolization water-cooled of free-falling twin nipple according to claim 1 solidifying metal matrix aluminum oxide magnetic abrasive preparation method soon, it is characterised in that the preparation process of metal matrix aluminum oxide magnetic abrasive is as follows:
1) in alumina abrasive tank (26), load the alumina abrasive of set amount and screw alumina abrasive tank lid (25);
2) metal_based material iron, silicon, aluminium, copper add electric furnace in regulation ratio, are heated to molten state and reach the superheating temperature of regulation;
3) open cold valves (6) and regulate the water level of water coolant (37) in atomization water-cooled room (36) to reach the height of regulation;
4) gas in gas blower (12), suction atomization water-cooled room (36) is opened;
5) open connect high-pressure nitrogen bottle 1(13) and high pressure draft nozzle (34) between air valve 1(16) and be adjusted to the stream pressure of regulation, and will be atomized in water-cooled room (36) and be full of nitrogen so that the metal aerosolization that will carry out is placed in the atmosphere of nitrogen completely;
6) open connect high-pressure nitrogen bottle 2(14) mix the air valve 2(15 between powder ejector nozzle (33) with low pressure) and be adjusted to the stream pressure of regulation;
7) start helix transporting device (24) and control powder feed rate by processing requirement;
8) molten metal in electric furnace (30) is evenly poured in insulation crucible (31), and keep regulation liquid level, until the molten metal in electric furnace (30) is to the greatest extent;
9), after molten metal all flows to end in insulation crucible (31), close helix transporting device (24), air valve 1(16 in order), air valve 2(15), gas blower (12);
10) closing gate valve (5) makes atomization water-cooled room (36) and magnetic abrasive fill with closed between (39), opening water drain valve (1) makes magnetic abrasive fill with the outflow of the water in (39), opening press filtration air valve (4) makes high pressure gas enter in the inner chamber that magnetic abrasive fills with (39), magnetic abrasive is blocked in the upper chamber that magnetic abrasive fills with (39) by filter screen (2), and water wherein is forced to extrude; Magnetic abrasive is filled with (39) take off, take out magnetic abrasive wherein, through vacuum-drying, screening and packaging, thus obtain varigrained magnetic abrasive;
11) in above process, control the temperature of molten metal, the powder feed rate of helix transporting device (24), the spraying pressure of the mixed powder ejector nozzle (33) of low pressure and high pressure draft nozzle (34), water coolant (37) water level in atomization water-cooled room (36) according to processing requirement, just can generate the magnetic abrasive of high-quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610043105.4A CN105665722B (en) | 2016-01-23 | 2016-01-23 | The twin-jet nozzle that freely lands mixes powder aerosolization water cooling and coagulates Metal Substrate aluminium oxide magnetic abrasive preparation method soon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610043105.4A CN105665722B (en) | 2016-01-23 | 2016-01-23 | The twin-jet nozzle that freely lands mixes powder aerosolization water cooling and coagulates Metal Substrate aluminium oxide magnetic abrasive preparation method soon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105665722A true CN105665722A (en) | 2016-06-15 |
| CN105665722B CN105665722B (en) | 2018-08-31 |
Family
ID=56302120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610043105.4A Active CN105665722B (en) | 2016-01-23 | 2016-01-23 | The twin-jet nozzle that freely lands mixes powder aerosolization water cooling and coagulates Metal Substrate aluminium oxide magnetic abrasive preparation method soon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105665722B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031853A (en) * | 2017-11-29 | 2018-05-15 | 湖南工业大学 | A kind of preparation facilities and preparation method of 3D printing composite granule |
| CN113134616A (en) * | 2021-04-19 | 2021-07-20 | 山东理工大学 | Plasma preparation method of metal-based ceramic 3D printing composite powder |
| CN113134618A (en) * | 2021-04-19 | 2021-07-20 | 山东理工大学 | Metal-based ceramic 3D printing composite powder plasma preparation device |
| CN115229195A (en) * | 2022-08-04 | 2022-10-25 | 中国地质大学（北京） | Nano amorphous alloy preparation device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1298031A (en) * | 1969-06-18 | 1972-11-29 | Republic Steel Corp | Apparatus and process for producing metal powder |
| EP0262869A1 (en) * | 1986-09-24 | 1988-04-06 | Alcan International Limited | Particulate Al alloy composites |
| WO1992001525A1 (en) * | 1990-07-19 | 1992-02-06 | Osprey Metals Limited | Device for introducing particulate material |
| EP0682578B1 (en) * | 1993-02-06 | 2000-04-12 | Behr South Africa (Pty) Limited | Production of powder |
| CN102250584A (en) * | 2011-06-11 | 2011-11-23 | 山东理工大学 | Equipment for preparing atomized quick-setting magnetic abrasive |
| CN102328091A (en) * | 2011-06-11 | 2012-01-25 | 山东理工大学 | Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method |
-
2016
- 2016-01-23 CN CN201610043105.4A patent/CN105665722B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1298031A (en) * | 1969-06-18 | 1972-11-29 | Republic Steel Corp | Apparatus and process for producing metal powder |
| EP0262869A1 (en) * | 1986-09-24 | 1988-04-06 | Alcan International Limited | Particulate Al alloy composites |
| WO1992001525A1 (en) * | 1990-07-19 | 1992-02-06 | Osprey Metals Limited | Device for introducing particulate material |
| EP0682578B1 (en) * | 1993-02-06 | 2000-04-12 | Behr South Africa (Pty) Limited | Production of powder |
| CN102250584A (en) * | 2011-06-11 | 2011-11-23 | 山东理工大学 | Equipment for preparing atomized quick-setting magnetic abrasive |
| CN102328091A (en) * | 2011-06-11 | 2012-01-25 | 山东理工大学 | Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method |
Non-Patent Citations (1)
| Title |
|---|
| 崔建民 等: "《钢铁粉末》", 31 January 2012 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031853A (en) * | 2017-11-29 | 2018-05-15 | 湖南工业大学 | A kind of preparation facilities and preparation method of 3D printing composite granule |
| CN113134616A (en) * | 2021-04-19 | 2021-07-20 | 山东理工大学 | Plasma preparation method of metal-based ceramic 3D printing composite powder |
| CN113134618A (en) * | 2021-04-19 | 2021-07-20 | 山东理工大学 | Metal-based ceramic 3D printing composite powder plasma preparation device |
| CN113134618B (en) * | 2021-04-19 | 2023-01-17 | 山东理工大学 | Metal-based ceramic 3D printing composite powder plasma preparation device |
| CN115229195A (en) * | 2022-08-04 | 2022-10-25 | 中国地质大学（北京） | Nano amorphous alloy preparation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105665722B (en) | 2018-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105665719B (en) | Mixed powder aerosolization water cooling of freely landing coagulates magnetic abrasive Preparation equipment soon | |
| CN105665726A (en) | Free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix diamond magnetic abrasive preparing method | |
| CN102250584B (en) | Equipment for preparing atomized quick-setting magnetic abrasive | |
| CN105665727B (en) | The twin-stage that freely lands mixes powder aerosolization water cooling and coagulates magnetic abrasive preparation method fastly | |
| CN102328091B (en) | Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method | |
| CN105665723A (en) | Preparing method for free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix silicon carbide magnetic abrasive | |
| CN105665722A (en) | Preparing method for free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix aluminum oxide magnetic abrasive | |
| CN105618770B (en) | Mixed powder aerosolization magnetic abrasive preparation send meal mixer with spiral automatic and accurate | |
| CN105665728A (en) | Preparation method for metal-based titanium carbide magnetic abrasive material by adopting double free-falling spray nozzles to mix powder and adopting gas-atomizing, water-cooling and quick-setting method | |
| CN202175648U (en) | Equipment for preparing aerosolized quickly-coagulated magnetic grinding material | |
| CN105665720B (en) | Free fall style mixes powder aerosolization magnetic abrasive and prepares twin-stage atomising device | |
| CN106493651A (en) | A kind of batch mixing heater and method for the fine emery wheel of 3D printing | |
| CN105252009A (en) | Manufacturing method for minuteness spherical titanium powder | |
| CN109382492A (en) | A kind of method and device continuously preparing particles reiforced metal-base composition | |
| CN112427646A (en) | Method for preparing magnetic abrasive material by supercritical carbon dioxide assisted plasma spray | |
| CN110695365A (en) | Method and device for preparing metal type coated powder by gas-solid two-phase atomization | |
| CN102277132A (en) | Structural form control method for preparing magnetic grinding materials by air atomization quick-setting process | |
| CN106747468B (en) | Drain tube material and preparation method thereof for aerosolization titanium or titanium alloy powder | |
| CN105665725A (en) | Free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix CBN magnetic abrasive preparing method | |
| CN105665721A (en) | Preparing method for free-falling double-nozzle powder mixing gas atomizing water-cooling fast-setting metal matrix chromium oxide magnetic abrasive | |
| CN107052354A (en) | A kind of device and method for preparing high sphericity 3D printing refractory metal powder | |
| CN107999776A (en) | A kind of preparation process of 3D printing metal dust | |
| KR102144062B1 (en) | Method and device for manufacturing shot particles | |
| CN105618769B (en) | Mixed powder aerosolization water cooling coagulates water cooling prepared by magnetic abrasive and coagulates method and water cooling solidifying device soon soon soon | |
| CN107127349B (en) | A kind of method of high temperature liquid iron aerosolization decarburization steel-making |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |