CN101298082B - Continuous casting heat composite apparatus and method for preparing copper lead alloy-steel shaft bushing material - Google Patents
Continuous casting heat composite apparatus and method for preparing copper lead alloy-steel shaft bushing material Download PDFInfo
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- CN101298082B CN101298082B CN2008101500894A CN200810150089A CN101298082B CN 101298082 B CN101298082 B CN 101298082B CN 2008101500894 A CN2008101500894 A CN 2008101500894A CN 200810150089 A CN200810150089 A CN 200810150089A CN 101298082 B CN101298082 B CN 101298082B
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Abstract
The invention discloses a continuous casting thermal compound device which comprises a bracket, a steel plate conveying device fixedly connected with the bracket, a sealing and heating device, an alloy metal thermal-insulation device, an alloy layer rolling and leveling device, a cooling device, a rolling roll device and an alloy melting device; an outlet at the bottom of the alloy metal thermal-insulation device is communicated with a chute runner at the top of a steel plate conveyer belt; an ultrasonic device is arranged below the chute runner; the cooling device is composed of multi-row orientated nozzles; all parts are regulated by a control system. The continuous casting thermal compound device is utilized for continuous casting and thermal compound of the copper lead alloy and the steel to produce a bimetallic bearing material; the copper lead-steel bearing material produced by the device of the invention has slender alloy structure, where the lead shows a short-shoot shape and a small part thereof has a shape of ball and is distributed uniformly on the copper matrix, without net-like structure or discontinuous net-like structure; the bearing material also has good homogeneity of structure, with relatively high bonding strength between duplex metals and stable and reliable quality.
Description
Technical field
The invention belongs to the metal material moulding processing technique field, be specifically related to a kind of continuous casting heat composite apparatus of bimetallic material, the invention still further relates to and utilize this device to prepare the method for copper lead alloy-steel shaft bushing material.
Background technology
Copper lead alloy-steel shaft bushing material is a blank of making bearing shell, it is a watt back of the body with steel plate, and Pot metal is a watt lining, under certain condition Pot metal and steel is combined, promptly, constitute Pot metal-bimetal copper-steel bush material at steel plate top casting layer of copper metal; Replenish mutually between each component of this bush material, form the excellent comprehensive performance, be widely used in the manufacturing of boats and ships, aviation, the contour performance internal combustion engine bearing of automobile.
At present, the method for preparing the Pot metal bush material mainly contains: static casting method, centrifugal casting, granular sensation are answered centrifugal casting, powder metallurgy sintered rolling method such as compound.
Static casting method is Pot metal liquid to be cast straight to the steel backing inner surface form metallurgical binding.Its technology is simple, but technological parameter is difficult to effective control, and problems such as casting flaw, the easy segregation of alloy liquid have limited the application of this method.
Centrifugal casting, earlier a watt back of the body is processed into tubular, inner surface is behind cleaning and 1000 ℃ of borax glasses of immersion plating, be held on fast on the horizontal centrifugal casting machine, start casting machine, melted in advance Pot metal liquid be poured in the box hat of rotation, rotate the very short time after, water is cooled to normal temperature rapidly, forms bearing bush billet.The method is fit to the small lot single-piece production, and product quality and workman's operant level relation are bigger, and quality stability is poor, and the segregation phenomena of ubiquity lead, influences the security reliability of internal combustion engine.
It is that the cold conditions box hat is held on the horizontal centrifugal casting machine that granular sensation is answered centrifugal casting, start casting machine, the Pot metal particle for preparing is in advance added auxiliary material, be blown into compressed air in the box hat of rotation, induction heater is enclosed within on the box hat, connect intermediate frequency power supply, be heated to 1150 ℃, stop heating, inductor breaks away from box hat, and water is cooled to normal temperature rapidly.The method is compared with spun casting with static casting, though reduced working strength of workers, plumbous segregation phenomena still exists.
Powder metallurgy sintered roll-bonding method, prepare pulverous Pot metal material earlier, again this Pot metal powder is tiled on the steel plate, place 800 ℃～900 ℃ temperature sintering rolling then, this method complex process, the bearing bush billet that obtains, dense structure's property is relatively poor, can not satisfy the requirement of high-power diesel engine to bush material.
Summary of the invention
The purpose of this invention is to provide a kind of continuous casting heat composite apparatus, steel plate conveying, steel plate preheating, alloy melting, bimetallic heat is compound, cooling and system in combination such as rolling are a single unit system, realized the automated production of the hot composite board of bimetallic, enhanced productivity.
Another object of the present invention provides the method for utilizing said apparatus to prepare copper lead alloy-steel shaft bushing material, solved the copper lead alloy-steel shaft bushing material that prior art makes, microstructure segregation, the bearing capacity of existence is low, service life is short and the problem of quality stability difference.
The technical solution adopted in the present invention is, a kind of continuous casting heat composite apparatus, comprise the support that is fixed on the ground, direction of feed by steel plate on the support is connected with steel plate conveying device, fiery curtain sealing device A, heated sealed passage, fiery curtain sealing device B, cooling device and roll extrusion rolling device successively
Fire curtain sealing device A, heated sealed passage and fiery curtain sealing device B constitute the steel plate pre-heating system of sealing; be disposed with eddy-current heating and radiant heating device and alloy-layer roll extrusion apparatus for leveling by the steel plate direction of feed in the heated sealed passage; the top of heated sealed passage is provided with gas shield device; gas shield device communicates with the heated sealed passage
The top of heated sealed passage also is provided with alloy melt attemperator, the alloy melt attemperator inside be fixed on the support by retainer agitator is installed, and the back upper place of alloy melt attemperator is provided with the alloy melting device that is fixed on the ground,
Be provided with casting and volume control device between described heated sealed passage and the alloy melt attemperator, casting and volume control device comprise slide gate nozzle, servo electric jar, skewed slot running channel and control device, slide gate nozzle is the outlet bottom the alloy melt attemperator respectively, the skewed slot running channel is connected with servo electric jar, and by servo electric jar drive slip, the skewed slot running channel stretches in the heated sealed passage from the top and between eddy-current heating and radiant heating device and alloy-layer roll extrusion apparatus for leveling, its outlet is positioned at the top of steel plate
Cooling device is positioned at the below of steel plate, comprises many rows nozzle of flow valve control, and the outlet of all nozzles is all towards steel plate.
Another technical scheme of the present invention is, utilizes said apparatus to prepare the method for copper lead alloy-steel shaft bushing material, carries out according to the following steps:
At first, cold-rolled steel sheet or steel band are processed, obtained the steel plate of channel-section steel form, this steel plate is carried out preliminary treatment;
Then, adopt continuous casting heat composite apparatus, Pot metal and steel plate heat is compound,
Concrete steps:
Step 1: copper and lead are put into an alloy melting device, adopt the intermediate frequency (IF) smelting technology, copper and lead are heated to 1130 ℃～1250 ℃, melting 0.3 hour～0.6 hour, obtain alloy molten liquid, then, this alloy molten liquid is sent into the alloy melt attemperator that is communicated with the alloy melting device, and with adjustment near liquidus curve, start the agitator that is provided with in the alloy melt attemperator, alloy molten liquid in the alloy melt attemperator is stirred, and formation temperature is 980 ℃～1100 ℃ a alloy pulp
Step 2: with pretreated steel plate; slit opening up; place on the conveyer belt of steel plate conveying device; start the steel plate conveying device; the transmission speed of control steel plate conveying device; steel plate enters in the heated sealed passage by fiery curtain sealing device A with conveyer belt; by eddy-current heating in the heated sealed passage and radiant heating device; the steel plate stage is quickly heated up to 700 ℃～1150 ℃; open the gas shield device that communicates with the heated sealed passage simultaneously; gas shield device is that the nitrogen-based atmosphere of 0.5KPa～2KPa is sent in the heated sealed passage with pressure, and steel plate is protected
Step 3: the steel plate of the conveyer belt of steel plate conveying device after with preheating is transported to the below of skewed slot running channel, control system is sent instruction to casting and volume control device, casting and volume control device start servo electric jar, and open the slide gate nozzle that an end links to each other with alloy melt attemperator outlet at bottom by servo electric jar, the alloy pulp that stirs through agitator in the alloy melt attemperator enters slide gate nozzle by the outlet of alloy melt attemperator bottom, and enter the skewed slot running channel that links to each other with slide gate nozzle by slide gate nozzle, then, outlet through the skewed slot running channel is poured in the steel plate opening groove up, the signal that the LOAD CELLS that alloy melt attemperator bottom is provided with changes to control system feedback low-temperature alloy stock quality immediately, the control servo electric jar, the promotion slide gate nozzle moves, the control alloy pulp flows into the flow of skewed slot running channel, alloy pulp steadily is cast in through on the steel plate of preheating, in the time of casting, be positioned at the ultrasonic energy devices of steel plate below, the low-temperature alloy slurry that waters on steel plate is applied ultrasonic energy
Step 4: upward go on foot the steel plate that is cast with Pot metal and under the drive of the conveyer belt of steel plate conveying device, continue to move forward,, the alloy pulp that casts on the steel plate is carried out the roll extrusion leveling by alloy-layer roll extrusion apparatus for leveling by alloy-layer roll extrusion apparatus for leveling,
Carry the steel plate of Pot metal after alloy-layer roll extrusion leveling device roll extrusion leveling; Outlet and fiery curtain sealing device B by the heated sealed passage send steel plate preheating system; The infrared radiation thermometer that is installed in the heated sealed channel exit is followed the tracks of detection to the temperature of steel plate; If the temperature of steel plate is lower than the temperature range of setting; Infrared radiation thermometer sends signal to control system; Control system is processed this signal; And send instruction to eddy-current heating and radiant heating device; Improve heating power; The temperature of steel plate is remained on the scope of setting
Step 5: the steel plate conveying device will be carried the steel plate of Pot metal and be sent by the steel plate pre-heating system, arrive the top of cooling device, many rows nozzle of cooling device is from the bottom up to steel plate spray cooling fluid, steel plate and Pot metal are cooled off fast with 60 ℃/second～100 ℃/second cooling velocity, realize the metallurgical binding between steel plate and the alloy, obtain ply-metal, gasification was steam after the cooling fluid that sprays to steel plate ran into high temperature, this steam moves upward, run into the condensation of gas device, be condensed into liquid, flow back to liquid withdrawal system then, some directly flows back to liquid withdrawal system the cooling fluid of cooling device ejection
Step 6: under the drive of the conveyer belt of steel plate conveying device, through the roll extrusion rolling device, the roll extrusion rolling device flattens this ply-metal, promptly makes copper lead alloy-steel shaft bushing material through cooled ply-metal of last step.
The invention has the beneficial effects as follows by steel backing preheating and insulation, the cooling velocity of control alloy melt, guarantee that plumbous segregation can not appear in alloy melt in whole process of production, plumbous phase particle is with tiny approximate spherical being uniformly distributed on the matrix, the alloy-layer of the bush material that makes and the bond strength between the steel backing guaranteed alloy-layer dense structure simultaneously, and technology are simple greater than 80MPa, the production efficiency height can satisfy the requirement of high-power diesel engine to bush material.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of heat composite apparatus of the present invention; Wherein, a is a front view, and b is a left view;
Fig. 2 is the metallography microscope photo of Pot metal tissue in the bush material that makes of heat composite apparatus of the present invention.
Among the figure, 1. fiery curtain sealing device A, 2. steel plate conveying device; 3. support, 4. eddy-current heating and radiant heating device, 5. casting and volume control device; 6. ultrasonic energy devices, 7. alloy-layer roll extrusion apparatus for leveling, 8. cooling device; 9. liquid withdrawal system, 10. condensation of gas device, 11. roll extrusion rolling devices; 12. steel plate, 13. alloy melt attemperators, 14. agitators; 15. the alloy melting device, 16. gas shield devices, 17. fiery curtain sealing device B.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The structure of a kind of embodiment of heat composite apparatus of the present invention, as shown in Figure 1.Comprise the support 3 that is fixed on the ground, support 3 top, be disposed with steel plate conveying device 2, fiery curtain sealing device A1, heated sealed passage, fiery curtain sealing device B 17, cooling device 8 and roll extrusion rolling device 11 along steel plate 12 directions of feed.
Fire curtain sealing device A1, heated sealed passage and fiery curtain sealing device B17 constitute the pre-heating system of the steel plate 12 of sealing.Fire curtain sealing device A1 is positioned at the import of heated sealed passage, and the exit of heated sealed passage is provided with fiery curtain sealing device B17 and infrared radiation thermometer.
The top direction of feed by steel plate 12 of heated sealed passage is disposed with gas shield device 16 and casting and volume control device 5.Gas shield device 16 communicates with the heated sealed passage, and casting and volume control device 5 are made up of slide gate nozzle, servo electric jar, skewed slot running channel and control device.Slide gate nozzle is connected with servo electric jar with the skewed slot running channel respectively, the skewed slot running channel stretches in the heated sealed passage from the top, its outlet is positioned at the top of steel plate 12, the import of skewed slot running channel is connected with the outlet of slide gate nozzle, and the import of slide gate nozzle is connected with the outlet at bottom of alloy melt attemperator 13.Alloy melt attemperator 13 is fixedlyed connected with support 3 by retainer, and is positioned at the top of casting and volume control device 5, is provided with agitator 14 in the alloy melt attemperator 13, and the bottom of alloy melt attemperator 13 is provided with LOAD CELLS.
In the heated sealed passage, be disposed with eddy-current heating and radiant heating device 4, ultrasonic energy devices 6 and alloy-layer roll extrusion apparatus for leveling 7 along the direction of feed of steel plate 12.Ultrasonic energy devices 6 is positioned at the below of steel plate 12, and aligns with the skewed slot running channel.
The back upper place of alloy melt attemperator 13 is provided with by bracing frame is fixed in alloy melting device 15 on the ground.
Steel plate conveying device 2, eddy-current heating and radiant heating device 4, casting and control device 5, ultrasonic energy devices 6, LOAD CELLS and infrared radiation thermometer are connected with control system respectively.
In the heat composite apparatus of the present invention,
The width of used steel plate 12 is that 90mm～300mm, thickness are 3mm～12mm, adopts cold-rolled steel sheet or steel bands such as 08#, 10#, 15#, 20#, 22#.
The length of eddy-current heating and radiant heating device 4 is 2 meters～18 meters, is made of the Frequency Induction Heating of 4kHz～8kHz and Elema or resistance wire.
Steel plate conveying device 2 adopts the seaming roll that be arranged in parallel up and down to carry steel plate 12, and seaming roll is connected with the reductor that drives by variable-frequency motor, and variable-frequency motor is regulated rotating speed by variable-frequency governor, and the transmission speed of control steel plate 12 is 1 meter/minute～10 meters/minute.
Alloy roll extrusion apparatus for leveling 7 is the hollow roll that be arranged in parallel up and down, is connected with cold water in the hollow roll.
Roll extrusion rolling device 11, comprise the roll that be arranged in parallel up and down, distance between the top and bottom rolls can be regulated, be 4mm～15mm, roll is connected with variable-frequency motor by reductor, variable-frequency motor joins by variable-frequency governor and power supply, regulates variable-frequency governor, and the linear velocity of control roll excircle is 1 meter/minute～10 meters/minute.
Adopt above-mentioned heat composite apparatus; copper and lead are put into alloy melting device 15; be heated to more than the single phase line; obtain alloy melt; then; this alloy melt poured in the alloy melt attemperator 13 by mechanism stir; make semi-solid alloy slurry; adopt the rising pouring mode, be poured into alloy pulp through preheating and have on the steel plate that moves horizontally 12 of gas shield, through to after the alloy pulp leveling; setting-time control and cooling velocity; guarantee the good combination of alloy-layer and steel backing, realize the alloy structure directional solidification, thereby obtain the Pot metal-bimetal copper-steel bush material of the tiny distribution of plumbous uniform particles in the alloy-layer.
Utilize above-mentioned heat composite apparatus to prepare the method for copper lead alloy-steel shaft bushing material, carry out according to the following steps:
Step 1: steel plate system groove
Steel plate or steel band is rolling or be processed into the channel-section steel form;
Step 2: steel plate carries out removing surface
The steel plate that step 1 is made, put into 5%～15% the caustic soda aqueous solution, boiled 1 minute～10 minutes, clean with hot water, put into technical hydrochloric acid then and soaked 1 minute～10 minutes, put into hot water again and boiled 1 minute～5 minutes, afterwards, place the borax saturated aqueous solution that boils to boil 1 minute～3 minutes, remove the greasy dirt and the oxide of surface of steel plate.
Step 3: adopt above-mentioned Pot metal-steel continuous casting heat composite apparatus, preparation Pot metal-bimetal copper-steel bush material,
Pot metal melting in the alloy melting device 15 of above-mentioned heat composite apparatus, smelting temperature is 1130 ℃～1250 ℃, melting 0.3 hour～0.6 hour obtains alloy molten liquid, then, this alloy molten liquid is sent into alloy melt attemperator 13, and with adjustment near liquidus curve, start the agitators 14 that are provided with in the alloy melt attemperator 13, the alloy fused solution is carried out brute force stirring, obtain temperature and be 980 ℃～1100 ℃ alloy pulp
With the steel plate 12 after step 2 processing; place on the steel plate conveying device 2; its slit opening up; steel plate 12 enters the heated sealed passage through the curtain sealing device A1 that overdoes, in the heated sealed passage under the drive of steel plate conveying device 2; by eddy-current heating and radiant heating device 4; steel plate 12 stages are heated to 700 ℃～1150 ℃, and simultaneously gas shield device 16 is that the nitrogen-based atmosphere of 0.5KPa～2KPa is sent in the heated sealed passage with pressure, and steel plate is protected.
In the time of casting, alloy pulp is stirred, guarantee that alloy structure is even, prevent that alloy structure from producing segregation.
In the casting process, be positioned at the ultrasonic energy devices 6 of steel plate 12 belows, the low-temperature alloy slurry that waters on steel plate 12 is applied ultrasonic energy, that quickens alloy pulp flows the refinement alloy structure.
The steel plate 12 that is cast with Pot metal continues to move forward, and by alloy-layer roll extrusion apparatus for leveling 7, the alloy pulp that pours on the steel plate is carried out the roll extrusion leveling, makes alloy-layer smooth, and thickness is even.
Alloy-steel plate after the roll extrusion leveling is by the outlet and the fiery curtain sealing device B17 of heated sealed passage, the infrared radiation thermometer that is installed in the heated sealed channel outlet is followed the tracks of detection to the temperature of steel plate 12, if the temperature of steel plate 12 is lower than range of set temperature, infrared radiation thermometer sends signal to control system, control system is handled this signal, and send instruction to eddy-current heating and radiant heating device 4, and improve heating power, the temperature of steel plate 12 is remained in the scope of setting.
The steel plate that carries Pot metal 12 that comes out by the heated sealed passage, arrive the top of cooling device 8, many rows nozzle of cooling device 8 is from the bottom up to steel plate 12 spray cooling fluids, steel plate and Pot metal are cooled off fast, cooling velocity is 60 ℃/second～100 ℃/second, realize the metallurgical binding between steel and the alloy, obtain ply-metal.The cooling fluid that sprays to steel plate 12 is vaporizated into steam in cooled alloy and steel plate 12, this steam moves upward, and runs into condensation of gas device 10, and is condensed into water, flows back to liquid withdrawal system 9 then.
Cooled ply-metal continues to move, and between the top and bottom rolls through roll extrusion rolling device 11, is flattened by 11 pairs of these ply-metals of roll extrusion rolling device, promptly makes copper lead alloy-steel shaft bushing material.
Above-mentioned nitrogen-based atmosphere, percentage by volume, hydrogen by 1%～20% and 99%～80% nitrogen mix and form, and the total amount of each component is 100%.Nitrogen-based atmosphere can effectively prevent the surface of steel plate oxidation, has guaranteed the bond strength between bimetallic.
Above-mentioned interim the heating can effectively prevent the appearance of Wei Shi soma in the steel plate, improves the fatigue strength of steel plate; Its method is: temperature is room temperature～700 ℃, with the speed Fast Heating of 40 ℃/s～200 ℃/s; Temperature is 700 ℃～1150 ℃, with the speed heating of 0.4 ℃/s～10 ℃/s.
Pot metal even tissue in the bush material that the present invention makes, tiny, plumbous phase average diameter be less than 50 μ m, its metallography microscope photo, and as shown in Figure 2, and in the Pot metal that present domestic prior art makes, plumbous phase average diameter is about 100 μ m.
The present invention is used for the preparation of high-performance copper lead alloy-steel shaft bushing material, guaranteed that plumbous segregation can not appear in alloy melt in whole process of production, plumbous phase particle is with tiny approximate spherical being uniformly distributed on the matrix, alloy-layer dense structure, and the bond strength of alloy-layer and steel backing is greater than 80MPa, improved the bearing capacity and the service life of bush material, can satisfy the requirement of high-power diesel engine bush material.
Claims (10)
1. continuous casting heat composite apparatus, it is characterized in that, comprise the support (3) that is fixed on the ground, the direction of feed that support (3) is gone up by steel plate (12) is connected with steel plate conveying device (2), fiery curtain sealing device A (1), heated sealed passage, fiery curtain sealing device B (17), cooling device (8) and roll extrusion rolling device (11) successively
Described fiery curtain sealing device A (1), heated sealed passage and fiery curtain sealing device B (17) constitute the steel plate pre-heating system of sealing; be disposed with eddy-current heating and radiant heating device (4) and alloy-layer roll extrusion apparatus for leveling (7) by steel plate (12) direction of feed in the heated sealed passage; the top of heated sealed passage is provided with gas shield device (16); gas shield device (16) communicates with the heated sealed passage
The top of described heated sealed passage also is provided with by retainer is fixed in alloy melt attemperator (13) on the support (3), alloy melt attemperator (13) inside is equipped with agitator (14), the back upper place of alloy melt attemperator (13) is provided with the alloy melting device (15) that is fixed on the ground
Be provided with casting and volume control device (5) between described heated sealed passage and the alloy melt attemperator (13), casting and volume control device (5) comprise slide gate nozzle, servo electric jar, skewed slot running channel and control device, slide gate nozzle is the outlet bottom alloy melt attemperator (13) respectively, the skewed slot running channel is connected with servo electric jar, and by servo electric jar drive slip, the skewed slot running channel from the top stretch in the heated sealed passage and be positioned at eddy-current heating and radiant heating device (4) and alloy-layer roll extrusion apparatus for leveling (7) between, its outlet is positioned at the top of steel plate (12)
Described cooling device (8) is positioned at the below of steel plate (12), comprises many rows nozzle of flow valve control, and the outlet of all nozzles is all towards steel plate (12).
2. according to the described continuous casting heat composite apparatus of claim 1, it is characterized in that described heated sealed passage is interior, the below of steel plate (12) is provided with the ultrasonic energy devices (6) of aliging with the skewed slot running channel.
3. according to the described continuous casting heat composite apparatus of claim 1, it is characterized in that the hollow roll of described alloy-layer roll extrusion apparatus for leveling (7) for be arrangeding in parallel up and down is connected with cold water in the hollow roll.
4. according to the described continuous casting heat composite apparatus of claim 1, it is characterized in that described roll extrusion rolling device (11) comprises the roll that be arranged in parallel up and down, the distance between the roll is 4mm～15mm.
5. according to the described continuous casting heat composite apparatus of claim 1, it is characterized in that the length of described eddy-current heating and radiant heating device (4) is 2 meters～18 meters.
6. according to the described continuous casting heat composite apparatus of claim 1, it is characterized in that the bottom of described alloy melt attemperator (13) is provided with weighing device.
7. utilize the described device of claim 1 to prepare the method for copper lead alloy-steel shaft bushing material, it is characterized in that, carry out according to the following steps:
At first, cold-rolled steel sheet or steel band are processed, obtained the steel plate (12) of channel-section steel form, this steel plate (12) is carried out preliminary treatment;
Then, adopt continuous casting heat composite apparatus, Pot metal and steel plate (12) heat is compound,
Concrete steps:
Step 1: copper and lead are put into an alloy melting device (15), adopt the intermediate frequency (IF) smelting technology, copper and lead are heated to 1130 ℃～1250 ℃, melting 0.3 hour～0.6 hour, obtain alloy molten liquid, then, this alloy molten liquid is sent into the alloy melt attemperator (13) that is communicated with alloy melting device (15), and with adjustment near liquidus curve, start the agitator (14) that is provided with in the alloy melt attemperator (13), alloy molten liquid in the alloy melt attemperator (13) is stirred, and formation temperature is 980 ℃～1100 ℃ a alloy pulp
Step 2: with pretreated steel plate (12); slit opening up; place on the conveyer belt of steel plate conveying device (2); start steel plate conveying device (2); the transmission speed of control steel plate conveying device (2); steel plate (12) enters in the heated sealed passage by fiery curtain sealing device A (1) with conveyer belt; by eddy-current heating in the heated sealed passage and radiant heating device (4); steel plate (12) stage is quickly heated up to 700 ℃～1150 ℃; open the gas shield device (16) that communicates with the heated sealed passage simultaneously; gas shield device (16) is that the nitrogen-based atmosphere of 0.5KPa～2KPa is sent in the heated sealed passage with pressure, and steel plate is protected
Step 3: the steel plate (12) of the conveyer belt of steel plate conveying device (2) after with preheating is transported to the below of skewed slot running channel, control system is sent instruction to casting and volume control device (5), casting and volume control device (5) start servo electric jar, and open the slide gate nozzle that an end links to each other with alloy melt attemperator (13) outlet at bottom by servo electric jar, the alloy pulp that stirs through agitator (14) in the alloy melt attemperator (13) enters slide gate nozzle by the outlet of alloy melt attemperator (13) bottom, and enter the skewed slot running channel that links to each other with slide gate nozzle by slide gate nozzle, then, outlet through the skewed slot running channel is poured in steel plate (12) the opening groove up, the signal that the LOAD CELLS that alloy melt attemperator (13) bottom is provided with changes to control system feedback low-temperature alloy stock quality immediately, the control servo electric jar, the promotion slide gate nozzle moves, the control alloy pulp flows into the flow of skewed slot running channel, alloy pulp steadily is cast in through on the steel plate (12) of preheating, in the time of casting, be positioned at the ultrasonic energy devices (6) of steel plate (12) below, the low-temperature alloy slurry that waters on steel plate (12) is applied ultrasonic energy
Step 4: upward go on foot the steel plate (12) that is cast with Pot metal and under the drive of the conveyer belt of steel plate conveying device (2), continue to move forward, by alloy-layer roll extrusion apparatus for leveling (7), by alloy-layer roll extrusion apparatus for leveling (7) alloy pulp that casts on the steel plate (12) is carried out the roll extrusion leveling
The steel plate (12) that carries Pot metal is after alloy-layer roll extrusion apparatus for leveling (7) roll extrusion leveling, outlet and fiery curtain sealing device B (17) by the heated sealed passage send the steel plate pre-heating system, the infrared radiation thermometer that is installed in the heated sealed channel exit is followed the tracks of detection to the temperature of steel plate (12), if the temperature of steel plate (12) is lower than range of set temperature, infrared radiation thermometer sends signal to control system, control system is handled this signal, and send instruction to eddy-current heating and radiant heating device (4), improve heating power, the temperature of steel plate (12) is remained on the scope of setting
Step 5: steel plate conveying device (2) will be carried the steel plate (12) of Pot metal and be sent by the steel plate pre-heating system, arrive the top of cooling device (8), many rows nozzle of cooling device (8) is from the bottom up to steel plate (12) spray cooling fluid, steel plate (12) and Pot metal are cooled off fast with 60 ℃/second～100 ℃/second cooling velocity, realize the metallurgical binding between steel plate (12) and the alloy, obtain ply-metal, gasification was steam after the cooling fluid that sprays to steel plate (12) ran into high temperature, this steam moves upward, run into condensation of gas device (10), be condensed into liquid, flow back to liquid withdrawal system (9) then, some directly flows back to liquid withdrawal system (9) cooling fluid of cooling device (8) ejection
Step 6: under the drive of the conveyer belt of steel plate conveying device (2), through roll extrusion rolling device (11), roll extrusion rolling device (11) flattens this ply-metal, promptly makes copper lead alloy-steel shaft bushing material through cooled ply-metal of last step.
8. according to the described method for preparing copper lead alloy-steel shaft bushing material of claim 7, it is characterized in that in the described step 2, the transmission speed of steel plate conveying device (2) is 1 meter/minute～10 meters/minute.
9. according to the described method for preparing copper lead alloy-steel shaft bushing material of claim 7, it is characterized in that, in the described step 2, the method of interim heating is: temperature is room temperature～700 ℃, firing rate is 40 ℃/s～200 ℃/s, temperature is 700 ℃～1150 ℃, and firing rate is 0.4 ℃/s～10 ℃/s.
10. according to the described method for preparing copper lead alloy-steel shaft bushing material of claim 7, it is characterized in that the nitrogen-based atmosphere in the described step 2, by volume percentage, hydrogen by 1%～20% and 99%～80% nitrogen mix and form, and the total amount of each component is 100%.
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| CN2008101500894A CN101298082B (en) | 2008-06-20 | 2008-06-20 | Continuous casting heat composite apparatus and method for preparing copper lead alloy-steel shaft bushing material |
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| CN101786145A (en) * | 2010-03-26 | 2010-07-28 | 昆明大泽矿冶设备有限公司 | Method for casting, rolling and molding lead alloy plate strip |
| CN101850362A (en) * | 2010-06-17 | 2010-10-06 | 中南大学 | Ultrasonic external field continuous casting and rolling machine |
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