CN1240686A - Apparatus and method for mfg. thin metal strip - Google Patents

Apparatus and method for mfg. thin metal strip Download PDF

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Publication number
CN1240686A
CN1240686A CN 99108005 CN99108005A CN1240686A CN 1240686 A CN1240686 A CN 1240686A CN 99108005 CN99108005 CN 99108005 CN 99108005 A CN99108005 A CN 99108005A CN 1240686 A CN1240686 A CN 1240686A
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CN
China
Prior art keywords
aforementioned
roller
atmosphere
cooling
metal sheet
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CN 99108005
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Chinese (zh)
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村上润一
小嶋章伸
山本丰
牧野彰宏
畑内隆史
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to CN 99108005 priority Critical patent/CN1240686A/en
Publication of CN1240686A publication Critical patent/CN1240686A/en
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  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

An apparatus for producing a metallic ribbon includes a cooling roll, a melt nozzle, and an air-cutoffunit provided to cover at least a portion of the periphery of the cooling roll and at least the melt blowout end ofthe melt nozzle, for preventing an inflow of air due to rotation of the cooling roll. The air-cutoff unit has a roll top air-cutoff plate provided above the cooling roll to extend from the front side to the rear side in the rotation direction of the cooling roll in such a manner that it approaches the cooling surface in the direction opposite to the rotation direction of the cooling roll. The melt blowout end of the melt nozzle is arranged to pass through a nozzle mounting hole provided in the roll top air-cutoff plate and face the cooling surface of the cooling roll.

Description

The manufacturing installation of metal sheet band and manufacture method thereof
The present invention relates to make the device of metal sheet band of amorphousmetal etc. and the manufacture method of this metal tape.
As the method for making metal sheet band, the most generally utilize the single roller method of single cooling roller now.Figure 33 represents to use the major part of the existing metal sheet band manufacturing installation of single roller method.
The single roller method is to make cooling roller 101 rotation at a high speed, motlten metal 103 by will ejection from contiguous motlten metal nozzle 102 simultaneously, be injected into the cooling surface top of this cooling roller, make motlten metal 103 on the cooling surface of cooling roller 101, rapid cooled and solidified, and send along the direction of rotation (direction of arrow A) of cooling roller.
From the motlten metal 103 of motlten metal nozzle 102 ejection, between the cooling surface of the front end of motlten metal nozzle 102 and cooling roller 101, form and accumulate part 104 (hereinafter referred to as " weld pool ").Along with the rotation of cooling roller 101, motlten metal 103 is drawn out from weld pool 104 gradually, and rapid cooled and solidified forms strip 105 continuously on the surface of cooling roller 101.
When supplying with material that the single roller method uses composition and constitute,, the motlten metal ejection is obstructed because the oxidation of material causes motlten metal nozzle 102 to stop up by easy oxidation.
In order to address this problem, in existing single roller method, once proposed whole metal sheet band manufacturing installation is placed in the chamber, by in this chamber, forming atmosphere of inert gases, reduce near the oxygen concentration of motlten metal nozzle, prevent the method for material oxidation.
Forming atmosphere of inert gases in the chamber, is extremely effective preventing aspect the motlten metal spray nozzle clogging, but because whole device is placed in the chamber some problem on the operability.For example, utilize existing single roller method, must in charging each time, open this chamber, the raw material of fusion are packed in calciner or the crucible, after this chamber is airtight, be replaced as these miscellaneous operations of atmosphere of inert gases again.
In addition, keep the cost of the required attendant equipment of atmosphere of inert gases very high in this chamber, this also is a problem.
The present invention proposes in order to solve foregoing problems, and its objective is to provide that a kind of not need that the chamber is set big, and the bad attendant equipment of operating characteristics and can reduce near the manufacturing installation of the metal sheet band of the oxygen concentration the motlten metal nozzle.
If in order to prevent the motlten metal spray nozzle clogging, can reduce amount of oxygen, then not need whole strip manufacturing installation to be placed in the atmosphere of inert gas as in the past by only near the motlten metal nozzle, forming atmosphere of inert gases.And, if the equipment that forms atmosphere of inert gases just is set near the motlten metal nozzle, then comparing with existing chamber, operability can improve, and equipment cost can reduce.
People such as present inventor are conceived to this point and study, by in suitable place, setting prevents the rotation because of the cooling roller, and atmosphere is involved in motlten metal nozzle atmosphere cut-off on every side, be provided with one simultaneously with the gas supply device around the inert gas supplying melting metal nozzle, can reduce motlten metal nozzle amount of oxygen on every side effectively.
Metal sheet band manufacturing installation of the present invention is to propose according to above understanding.It is made up of following parts: the cooling roller that has the cooling surface of cooling molten metal; And keep certain clearance between the aforementioned cooling roller, the motlten metal nozzle relative with aforementioned cooling surface; Cover at least a portion of aforementioned cooling roller excircle and be the ejection part front end of aforementioned motlten metal nozzle at least, prevent that the rotation owing to aforementioned cooling roller is involved in the atmosphere cut-off of atmosphere.
The body of aforementioned motlten metal nozzle preferably is configured in the outside of the peripheral atmosphere cut-off of aforementioned roller.
In addition, in the metal sheet band manufacturing installation of the present invention, the peripheral atmosphere cut-off of aforementioned roller is located at the place ahead and the rear of aforementioned cooling roller direction of rotation at least.In direction of rotation the place ahead of aforementioned cooling roller, be provided with atmosphere and be detained part.
Atmosphere is detained the inside that part can be located at the peripheral atmosphere cut-off of aforementioned roller, also can be located at its outside.The aperture area that this atmosphere is detained part is the biggest like the opening portion area of the peripheral atmosphere cut-off of aforementioned roller.In addition, aforementioned atmosphere is detained the inside of part, and available polylith demarcation strip is separated.
Metal sheet band manufacturing installation of the present invention has the peripheral atmosphere cut-off of roller, and this device has at least: the roller front atmosphere shield that is located at front, aforementioned cooling roller direction of rotation the place ahead; Be located at both sides, aforementioned cooling roller direction of rotation the place ahead, clamp aforementioned cooling roller, a pair of roller the place ahead atmosphere shield that contacts with aforementioned roller front atmosphere shield; Rearward extend from direction of rotation the place ahead of aforementioned cooling roller, contact, be positioned at the roller top atmosphere baffle board of aforementioned cooling roller top with aforementioned roller the place ahead atmosphere shield upper end-face edge; With the roller surface atmosphere baffle board that is located at aforementioned cooling roller direction of rotation rear, contacts with the cooling surface of aforementioned cooling roller; Aforementioned roller top atmosphere baffle board, along with advancing in the direction of rotation rear to aforementioned cooling roller, approaching with the cooling surface of aforementioned cooling roller; The ejection part front end of aforementioned motlten metal nozzle connects the nozzle installing hole on the atmosphere baffle board of aforementioned roller top, and is relative with the cooling surface of aforementioned cooling roller.
Aforementioned roller top atmosphere baffle board is preferably from cooling off the place ahead of roller direction of rotation, towards the smooth extension of aforementioned cooling surface.
Aforementioned roller top atmosphere baffle board also can be from the place ahead of cooling roller direction of rotation, extends towards aforementioned cooling surface, simultaneously towards the peripheral atmosphere cut-off of aforementioned roller interior curve.
In addition, at least more than one also can be set to the inner outstanding demarcation strip of the peripheral atmosphere cut-off of aforementioned roller on atmosphere baffle board above the aforementioned roller.
In addition, on the atmosphere baffle board of aforementioned roller front, preferably be provided with the through port that passes through at the metal sheet band that cools off cooling formation on the roller.
Metal sheet band manufacturing installation of the present invention also has inert gas is supplied to air-flow feedway around the aforementioned motlten metal nozzle.
It is two places at rear of the cooling roller direction of rotation of benchmark that this air-flow feedway is located at the motlten metal nozzle, preferably is located at two places in direction of rotation the place ahead.Particularly, be configured in two air-flow feedwaies at cooling roller direction of rotation rear, the slit jaw of one of them air-flow feedway is to the front end of motlten metal nozzle; And another air-flow feedway is configured between motlten metal nozzle and the aforementioned first air-flow feedway.Preferably will be supplied to from the air-flow of aforementioned first air-flow feedway ejection from the air-flow of aforementioned another air-flow feedway ejection.
Be preferably 2～80 meter per seconds from the gas flow rate of aforementioned air-flow feedway ejection, gas flow is preferably 200～1400 liters/minute.
In addition, the inventor etc. have taked a plurality of aforementioned air-flow feedwaies, by the first air-flow feedway and the second air-flow feedway are set, can reduce motlten metal nozzle amount of oxygen on every side efficiently.
That is: a kind of metal sheet band manufacturing installation on the cooling surface of its cooling roller by motlten metal being injected in rotation, forms metal sheet band by aforementioned cooling surface with this motlten metal cooling, and this device has: aforementioned cooling roller; With aforementioned cooling roller from a distance, motlten metal is injected into the motlten metal nozzle of aforementioned relative cooling surface; At least from the ejection part front end of aforementioned motlten metal nozzle, to the aforementioned metal strip from position that aforementioned cooling surface is peeled off, along the direction of rotation of aforementioned cooling roller, be covered with aforementioned cooling surface, prevent the atmosphere cut-off that atmosphere is involved in owing to the rotation of aforementioned cooling roller; Be positioned at and leave aforementioned motlten metal nozzle and the relative position of aforementioned cooling roller, at aforementioned cooling roller direction of rotation rear, contact with aforementioned cooling surface, blocking is because the rotation of aforementioned cooling roller, along aforementioned cooling surface, be involved in the roller surface atmosphere cut-off of aforementioned motlten metal nozzle atmosphere on every side; At least from position that aforementioned metal sheet band and aforementioned cooling surface are peeled off, to the position that is provided with aforementioned roller surface atmosphere cut-off, extend along aforementioned cooling roller direction of rotation, surround aforementioned cooling roller, cover aforementioned cooling surface, and the peripheral atmosphere cut-off of the roller that stands away with aforementioned cooling surface; Around aforementioned motlten metal nozzle, supply with the first air-flow feedway of inert gas; At least from the position that aforementioned metal sheet band and aforementioned cooling surface are peeled off, between the position that is provided with aforementioned atmosphere cut-off, with aforementioned cooling surface from a distance, inert gas is supplied to the second air-flow feedway of aforementioned cooling surface.
In addition, preferably aforementioned motlten metal nozzle body is configured in the outside of the peripheral atmosphere cut-off of aforementioned roller.
In addition, in the metal sheet band manufacturing installation of the present invention, aforementioned atmosphere cut-off has at least: depart from aforementioned motlten metal nozzle, be located at the roller front atmosphere baffle board above aforementioned cooling roller direction of rotation the place ahead; Depart from aforementioned motlten metal nozzle location, be positioned at the both sides, direction of rotation the place ahead of aforementioned cooling roller, clamp aforementioned cooling roller, a pair of roller the place ahead atmosphere baffle board that contacts with aforementioned roller front atmosphere baffle board; From aforementioned cooling roller direction of rotation the place ahead, rearward extend, contact with the upper end-face edge of aforementioned roller the place ahead atmosphere baffle board, be positioned at the roller top atmosphere baffle board of aforementioned cooling roller top; Clamp aforementioned cooling roller, a pair of roller side atmosphere baffle board that contacts with the peripheral atmosphere cut-off of aforementioned roller the place ahead atmosphere baffle board and aforementioned roller; Aforementioned roller top atmosphere baffle board along with advancing in the direction of rotation rear to aforementioned cooling roller, contacts with the aforementioned cooling surface of aforementioned cooling roller; The front end of the aforementioned ejection part of aforementioned motlten metal nozzle connects the nozzle installing hole on the atmosphere baffle board of aforementioned roller top, and is relative with the aforementioned cooling surface of aforementioned cooling roller.
Aforementioned roller top atmosphere baffle board is from direction of rotation the place ahead of aforementioned cooling roller, towards the smooth extension of cooling surface of aforementioned cooling roller.
Aforementioned roller top atmosphere baffle board is from direction of rotation the place ahead of aforementioned cooling roller, towards the cooling surface extension of aforementioned cooling roller, simultaneously to the peripheral atmosphere cut-off of aforementioned roller interior curve.
On atmosphere baffle board above the aforementioned roller, done at least more than one, towards the inner outstanding demarcation strip of the peripheral atmosphere cut-off of aforementioned roller.
On the atmosphere baffle board of aforementioned roller front, do the through port that the aforementioned metal strip passes through.
The gas flow of aforementioned first air-flow feedway ejection is preferably 200～400 liters/minute.
In addition, the gas flow from aforementioned second air-flow feedway ejection is preferably 150～350 liters/minute.
Again, to be located at the motlten metal nozzle be two places at the cooling roller direction of rotation rear of benchmark to the first air-flow feedway; Preferably be located at two places in direction of rotation the place ahead.Particularly, be configured in two air-flow feedwaies at cooling roller direction of rotation rear, its first air-flow feedway is at the front end of slit jaw to the motlten metal nozzle; And another air-flow feedway is configured between motlten metal nozzle and the aforementioned first air-flow feedway.Preferably, be supplied on the air-flow of aforementioned first air-flow feedway ejection from the air-flow of aforementioned another air-flow feedway ejection.
In addition, in the metal sheet band manufacturing installation of the present invention,,, be provided with atmosphere and be detained part in direction of rotation the place ahead of aforementioned cooling roller departing from aforementioned motlten metal nozzle location.
Aforementioned atmosphere is detained part can be located at the peripheral atmosphere cut-off of aforementioned roller inside, also can be located at its outside.The aperture area that this atmosphere is detained part is the biggest like the opening portion area of aforementioned atmosphere cut-off.In addition, this atmosphere delay partial interior can be separated with the polylith demarcation strip.
Preferably use two kinds at least as inert gas, inert gas is N preferably 2, He, Ar, Kr, Xe, Rn.
In addition, owing to make the 6th air current spray nozzle surround the front end of motlten metal nozzle, be partial to a little on the inner position in the center of the excircle of aforementioned the 6th air current spray nozzle and inner periphery and done many holes, therefore, surrounding the motlten metal spray nozzle front end, under the situation of ejection gas, utilize, can reduce near the oxygen concentration of motlten metal nozzle more from the 6th strand of air-flow of the 6th air current spray nozzle ejection.
In addition, the 6th air current spray nozzle also can be made a plurality of holes in the form of a ring on the center of its external diameter and internal diameter, or does not do the hole, and makes the groove of ring-type.Can also make spiral type, surround the motlten metal spray nozzle front end two-layer.
In the metal sheet band manufacturing installation of the present invention, aforementioned first air current spray nozzle is from the roughly tangential direction of aforementioned cooling roller, and towards the preceding extreme direction configuration of aforementioned motlten metal nozzle, it can spray the inert gas than the indifferent gas body weight of other air current spray nozzle ejections; Aforementioned second air current spray nozzle is located between aforementioned motlten metal nozzle and aforementioned first air current spray nozzle, and it is injected into gas from the air-flow of aforementioned first air current spray nozzle ejection.
Be preferably 200～600 liters/minute from the gas flow of aforementioned first air-flow feedway ejection.
A kind of metal sheet band manufacture method that forms metal sheet band, it be from and have between the cooling roller of cooling surface and keep certain intervals, motlten metal nozzle facing to aforementioned cooling surface, molten alloy is injected on the aforementioned cooling roller of rotation, sharply cools off and form the method for metal sheet band; Utilize the atmosphere cut-off to cover at least a portion of aforementioned roller periphery and be the front end of the ejection part of aforementioned motlten metal nozzle at least, to prevent since the atmosphere that the rotation of aforementioned cooling roller causes be involved in, and aforementioned motlten metal is injected on the aforementioned cooling roller, and form metal sheet band.
In aforementioned manufacture method, preferably inert gas is supplied to aforementioned motlten metal nozzle or cooling roller at least one side around, simultaneously with molten alloy ejection, sharply cooling, and form metal sheet band.
In addition, aforementioned inert gas can be supplied with by a plurality of air-flow feedwaies, preferably supplies with at least two kinds of inert gases and forms metal sheet band.
Aforementioned two kinds of inert gases are preferably N 2And Ar.
Below, first embodiment of metal sheet band manufacturing installation of the present invention is described with reference to accompanying drawing.
Figure 1A is the side view of first embodiment of expression metal sheet band manufacturing installation of the present invention;
Figure 1B is the front view of first embodiment of expression metal sheet band manufacturing installation of the present invention;
Fig. 2 is Figure 1A, the side sectional view of the manufacturing installation of metal sheet band shown in Figure 1B;
Fig. 3 is expression Figure 1A, the structure chart of the major part of the metal sheet band manufacturing installation shown in Figure 1B;
Fig. 4 is the perspective view of the major part of the metal sheet band manufacturing installation among expression first to the 3rd embodiment of the present invention;
Fig. 5 A is the side sectional view of the metal sheet band manufacturing installation of the expression first embodiment of the present invention;
Fig. 5 B is the front view of the metal sheet band manufacturing installation of the expression first embodiment of the present invention;
Fig. 6 A is the side sectional view of the metal sheet band manufacturing installation of the expression first embodiment of the present invention;
Fig. 6 B is the front view of the metal sheet band manufacturing installation of the expression first embodiment of the present invention;
Fig. 7 A is the side view of the metal sheet band manufacturing installation of the expression first embodiment of the present invention;
Fig. 7 B is the front view of the metal sheet band manufacturing installation of the expression first embodiment of the present invention;
Fig. 8 A is the side view of the atmosphere shield at the roller rear of expression first to the 3rd embodiment of the present invention;
Fig. 8 B is the front view of the atmosphere shield at the roller rear of expression first to the 3rd embodiment of the present invention;
Fig. 9 represents the figure of the suitable quantity-produced metal sheet band manufacturing installation of first to the 3rd embodiment of the present invention;
Figure 10 A for expression first to the 3rd embodiment of the present invention second, third, the plane of the 4th air current spray nozzle;
Figure 10 B is the front view of second air current spray nozzle of expression first to the 3rd embodiment of the present invention;
Figure 10 C is the front view of the 3rd air current spray nozzle of expression first to the 3rd embodiment of the present invention;
Figure 10 D is the front view of the 4th air current spray nozzle of expression first to the 3rd embodiment of the present invention;
Figure 11 A is the plane of first air current spray nozzle of expression first to the 3rd embodiment of the present invention;
Figure 11 B is the front view of first air current spray nozzle of expression first to the 3rd embodiment of the present invention;
Figure 11 C is the side view of first air current spray nozzle of expression first to the 3rd embodiment of the present invention;
Figure 12 A is the side view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 12 B is the front view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 13 is expression Figure 1A, the structure chart of the major part of the manufacturing installation of metal sheet band shown in Figure 1B;
Figure 14 A is the side view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 14 B is the front view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 15 A is the side sectional view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 15 B is the front view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 16 A is the side sectional view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 16 B is the front view of the metal sheet band manufacturing installation of the expression second embodiment of the present invention;
Figure 17 A is the side view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 17 B is the front view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 18 is expression Figure 1A, the structure chart of the major part of the manufacturing installation of metal sheet band shown in Figure 1B;
Figure 19 A is the plane of an example of expression the 6th air current spray nozzle;
Figure 19 B is the cutaway view of an example of expression the 6th air current spray nozzle;
Figure 20 A is the plane of second example of expression the 6th air current spray nozzle;
Figure 20 B is the cutaway view of second example of expression the 6th air current spray nozzle;
Figure 21 A is the plane of the 3rd example of expression the 6th air current spray nozzle;
Figure 21 B is the cutaway view of the 3rd example of expression the 6th air current spray nozzle;
Figure 22 A is illustrated in test example 7 to the plane of testing the 6th air current spray nozzle that uses in the example 9;
Figure 22 B is illustrated in test example 7 to the cutaway view of testing the 6th air current spray nozzle that uses in the example 9;
Figure 23 A is the side view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 23 B is the front view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 24 A is the side sectional view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 24 B is the front view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 25 A is the side sectional view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 25 B is the front view of the metal sheet band manufacturing installation of the expression third embodiment of the present invention;
Figure 26 is near oxygen concentration the weld pool that is illustrated in the test example 2 and the graph of a relation that cools off the rotary speed of roller;
Figure 27 is illustrated under the situation of using the 6th air current spray nozzle shown in Figure 19 A to Figure 21 B, the graph of a relation of near the oxygen concentration formation weld pool part and the flow of the 6th air current spray nozzle;
Figure 28 uses Figure 19 A for being illustrated in, and the situation of the 6th air current spray nozzle shown in Figure 19 B and not using under the situation of the 6th air current spray nozzle is forming near the oxygen concentration the weld pool part and cooling off the graph of a relation of roller rotary speed;
Figure 29 uses Figure 20 A for expression, under the situation of the 6th air current spray nozzle shown in Figure 20 B, and near the oxygen concentration weld pool forms partly and the graph of a relation of the rotary speed of cooling roller;
Figure 30 uses Figure 21 A for expression, under the situation of the 6th air current spray nozzle shown in Figure 21 B, and near the oxygen concentration weld pool forms partly and the graph of a relation of the rotary speed of cooling roller;
Figure 31 uses a kind of inert gas and uses under two kinds of inert gas situations near the oxygen concentration weld pool forms partly and the graph of a relation of the rotary speed of cooling roller for being illustrated in;
Figure 32 only uses under the situation of an air current spray nozzle of selecting from first to the 6th air current spray nozzle for expression, near the oxygen concentration the weld pool formation part and the graph of a relation of the rotary speed of cooling roller;
Figure 33 uses the figure of the strip manufacturing installation of single roller method for expression.
As Figure 1A, Figure 1B, Fig. 2 and shown in Figure 3, the metal sheet band manufacturing installation of present embodiment is basically by cooling roller 1, the motlten metal nozzle 2 that is connected with the lower end of the crucible 3 that keeps motlten metal, coiling is configured in the heater coil 4 of the exterior circumferential of motlten metal nozzle 2 and crucible 3, be used to supply with first to fourth air current spray nozzle 51～54 of the air-flow feedway of inert gas, being involved in atmosphere cut-off 60 that near the motlten metal nozzle atmosphere is a purpose and atmosphere with blocking is detained part 80 and constitutes.
Cooling roller 1 is rotated according to direction shown in the arrow (counterclockwise) by the motor-driven that does not illustrate among the figure.At least be the most handy carbon steel in surface (for example, ferrous alloys such as JIS S 45C) or the brass (Cu-Zn alloy) of cooling roller 1, or fine copper is made.When the surface that is cooling roller 1 at least was brass or fine copper, because the heat conductivity height, therefore, good cooling results was suitable for the rapid cooling of motlten metal.In order to improve cooling effect, be preferably in cooling roller inside water-cooling structure is set.
As shown in Figure 3, the motlten metal of fusion in crucible 3 is from the motlten metal nozzle 2 of its lower end, towards the surface ejection of cooling roller 1.The top of crucible 3 by supply pipe 7, is connected with gas supply sources 8 such as argon (Ar) gas.Simultaneously, pressure-regulating valve 9 and magnetic valve 10 are installed on supply pipe 7; On supply pipe 7, between pressure-regulating valve 9 and magnetic valve 10, Pressure gauge 11 is installed.Auxiliary tube 12 is connected in parallel with supply pipe 7, on auxiliary tube 12, pressure-regulating valve 13 is installed, flow control valve 14 and flowmeter 15.Therefore, gases such as argon (Ar) gas are sent in the crucible 3, motlten metal can be ejected on the cooling roller 1 from motlten metal nozzle 2 from gas supply source 8.
When making metal sheet band, make cooling roller 1 rotation at a high speed, by from being configured near its top or a little near the nozzle 2 inclined to one side the place ahead, its top, the ejection motlten metal is in the sharply cooling of the surface of cooling roller 1, therefore, along the direction of rotation of cooling roller 1, form band shape and pull out.The ejiction opening of motlten metal nozzle 2 is a rectangle, and its ejection width (width on the direction of rotation of cooling roller 1) is preferably about 0.2～0.8 millimeter.When below 0.2 millimeter the time, the composition of motlten metal makes the motlten metal spray nozzle clogging easily; And when surpassing 0.8 millimeter, cooling raio is difficult fully.
Cooling roller 1 when making metal sheet band and the interval between the motlten metal 2 can be selected in 0.1～0.8 millimeter scope.When below 0.1 millimeter the time, motlten metal ejection difficulty may cause the breakage of motlten metal nozzle 2; And when surpassing 0.8 millimeter, the good strip of manufacturing property and shape is difficulty relatively.Interval between cooling roller 1 and the motlten metal nozzle 2 can be adjusted, and this point can be made it lifting and be accomplished by the lowering or hoisting gear of crucible 3 by not illustrating among the figure.Because after beginning from the manufacturing of metal sheet band, temperature rises and causes surface heat to expand, the enlarged-diameter of cooling roller 1, therefore, in order to make the high strip of thickness of slab precision, be preferably in make beginning after, slowly increase the interval between cooling roller 1 and the motlten metal nozzle 2.
And for example Figure 1A and shown in Figure 2 in the front lower place of the direction of rotation of cooling off roller 1, is equipped with strip guided plate 70 and scraper plate 72.The metal sheet band that forms on the cooling surface of cooling roller 1 is peeled off from cooling roller 1 by scraper plate 72, by strip guided plate 70 guiding, passes through through port 641 again, exports metal sheet band manufacturing installation outside to.
The supply of inert gas, can motlten metal nozzle 2 as benchmark, either party or two sides from rear, the place ahead carry out.Best, from rear and the place ahead, supply with the gas stream of two systems respectively.
In Fig. 3, first air current spray nozzle 51 is for being benchmark with motlten metal nozzle 2, is configured in a device in the device that the gas communication of carrying out aforementioned two system at rear supplies with.This first air current spray nozzle 51, roughly from the tangential direction at rear of cooling roller 1, gas is sprayed onto near the front end of motlten metal nozzle 2 (below, be called weld pool).As Figure 11 A, shown in Figure 11 B, it is 5 millimeters thinner slit 510 that first air current spray nozzle 51 has width, therefore, can spray gas stream at a high speed.
Second air current spray nozzle 52 also is a kind of device that carries out in the device that aforementioned two system air-flow supplies with, atmosphere is involved in order to prevent to supply with air-flow, to interdict from air-flow and the atmosphere that first air current spray nozzle 51 is sent, this second air current spray nozzle 52 is arranged between the motlten metal nozzle 2 and first air current spray nozzle 51.As Figure 10 A, shown in Figure 10 B, second air current spray nozzle 52 has 20 millimeter the slit 520 wideer than first air current spray nozzle 51, therefore, and can be than main air flow velocity ejection slowly gas stream.
The 3rd air current spray nozzle 53 is a kind of devices that are used for being configured the device of supplying with at the aforementioned two system air-flow that is the place ahead of benchmark with motlten metal nozzle 2, its objective is to prevent that atmosphere is involved in from direction of rotation the place ahead of cooling roller 1.The shape of the 3rd air current spray nozzle 53 is identical with second air current spray nozzle 52, but the width of slit 540 is narrower, is 2.5 millimeters.
As Figure 1A, Figure 1B and shown in Figure 2, the 4th air current spray nozzle 54 also are a kind of devices that is configured in the device that the two system air-flow in the place ahead of motlten metal nozzle 2 is supplied with, and it is arranged on the upper front end of atmosphere cut-off 60; Its objective is and to prevent that atmosphere is involved in from being arranged in from the opening 641 of the place ahead frontal of cooling roller 1.As Figure 10 A, shown in Figure 10 D, the shape of the 4th air current spray nozzle 54 is identical with the 3rd air current spray nozzle 53 with second air current spray nozzle 52, but the width of slit 550 is 3 millimeters.
Certainly, aforementioned first to fourth air current spray nozzle can use separately, but also a plurality of nozzles can be used in combination.The effect that near the weld pool oxygen reduces is a maximum with first and second air current spray nozzles.
In above each air current spray nozzle, as first air current spray nozzle 51 of Fig. 3 be shown in the example like that, the connecting line 17 of pressure-regulating valve 16 by connecting is connected with source of the gas 18.
Like this, by first to fourth air current spray nozzle 51～54 is configured in motlten metal nozzle 2 around, can reduce near the oxygen concentration the weld pool.
When utilizing metal sheet band manufacturing installation of the present invention to make strip, before preferably rotating, just supply with inert gas by air current spray nozzle 51～54 from cooling roller 1.Compare with the situation of after the rotation of cooling roller, just supplying with inert gas, before the rotation of cooling roller, just supply with air-flow, the concentration of oxygen is reduced rapidly.Therefore, measure the oxygen concentration near the atmosphere of motlten metal nozzle, after reaching the oxygen concentration of regulation, just make 1 rotation of cooling roller, can boost productivity.
In the present invention, as the supply conditions of inert gas, desirable flow velocity is 2～80 meter per seconds, and flow is 200～1400 liters/minute, and it is better to carry out air feed under 1330 liters/minute condition.When flow velocity when 2 meter per seconds are following, do not reach the effect of the amount of oxygen near the atmosphere that is reduced in the motlten metal nozzle; But when surpassing 80 meter per seconds, can become atmosphere indrawn reason around the air-flow, therefore reduce the effect that reduces oxygen concentration.In addition, when flow less than 200 liters/timesharing, do not reach the effect that reduces near the amount of oxygen in the atmosphere motlten metal nozzle yet; And, also can not get the effect that matches with air demand when surpassing 1400 liters/timesharing.
In this case, the two system air-flow that comes from the rear, preferably the flow velocity of aforementioned one air-flow (air-flow of first air current spray nozzle ejection) is 10～35 meter per seconds, and flow is 5～400 liters/minute; And the flow velocity of aforementioned another strand air-flow (air-flow of second air current spray nozzle ejection) is 2～10 meter per seconds, and flow is 5～400 liters/minute.The two system air-flow that comes from the place ahead, preferably the flow velocity of aforementioned one air-flow (air-flow of the 3rd air current spray nozzle ejection) is 10～50 meter per seconds, and flow is 5～400 liters/minute; And the flow velocity of another strand air-flow (air-flow of the 4th air current spray nozzle ejection) is 10～80 meter per seconds, and flow is 300～600 liters/minute.Be respectively from the desirable scope of flow parameter of first to fourth air current spray nozzle ejection: the air-flow-flow velocity of first air current spray nozzle ejection is 15～30 meter per seconds, and flow is 250～350 liters/minute, is preferably 300 liters/minute; Air-flow-the flow velocity of second air current spray nozzle ejection is 4～8 meter per seconds, and flow is 230～330 liters/minute, is preferably 280 liters/minute; Air-flow-the flow velocity of the 3rd air current spray nozzle ejection is 20～40 meter per seconds, and flow is 200～300 liters/minute, is preferably 250 liters/minute; Air-flow-the flow velocity of the 4th air current spray nozzle ejection is 20～70 meter per seconds, and flow is 400～550 liters/minute.
Particularly, if the flow of the air-flow of the 4th air current spray nozzle ejection is preferably 500 liters/minute more than 450 liters/minute, then can reduce near the oxygen concentration of weld pool more.
As used inert gas in the metal sheet band manufacture method of the present invention, can be from N 2, select among He, Ar, Kr, Xe and the Rn one or more, but will be clear from embodiment described later, Ar preferably.
Secondly, roller atmosphere cut-off 60 on every side is described.
As Figure 1A, Figure 1B and shown in Figure 2, atmosphere cut-off 60 of the present invention has at least: the atmosphere shield 64 that is located at the roller front in the front, direction of rotation the place ahead of cooling off roller 1; Be located at the both sides in direction of rotation the place ahead of cooling roller 1, a pair of roller the place ahead atmosphere shield 63 of clamping the cooling roller and contacting with roller front atmosphere shield 64; Be located at above direction of rotation the place ahead of cooling roller 1, with atmosphere shield 62 above the roller that the upper end-face edge of the atmosphere baffle board 63 in roller the place ahead contact; With the direction of rotation rear that is located at cooling roller 1, the roller surface atmosphere baffle board 61 that contacts with the cooling surface of cooling roller 1.
As Figure 1A, Fig. 2 and shown in Figure 3, roller surface atmosphere baffle board 61 is the platy structure with fore-end of acute angle, the fore-end of its acute angle contacts with the surface of cooling roller 1.Because the purpose of roller surface atmosphere baffle board 61 is set is the atmosphere that will interdict attached to the surface of cooling roller 1, prevent that it is involved near the weld pool, therefore, when cooling roller 1 rotates with high speed, by roller surface atmosphere baffle board 61, can interdict lip-deep atmosphere, prevent that it is involved near the weld pool attached to cooling roller 1.
As shown in Figure 3, because first and second air current spray nozzles 51,52 are configured between this roller surface atmosphere shield 61 and the motlten metal nozzle 2, after roller surface atmosphere baffle board 61 is with the atmosphere blocking, when resupplying inert gas flow, can improve the effect that near the oxygen concentration of weld pool reduces.In addition, be involved near the weld pool, polylith roller surface atmosphere baffle board 61 also can be set in order to interdict atmosphere effectively.
As Figure 1A, Figure 1B and shown in Figure 2, the purpose that roller the place ahead atmosphere baffle board 63 is set is will interdict atmosphere to be involved in from the place ahead of two sides of cooling roller 1.
The purpose that roller front atmosphere baffle board 64 is set is will interdict atmosphere to be involved in from the place ahead relative with the cooling surface of cooling roller 1.In the present embodiment, in the front end of aforementioned roller the place ahead atmosphere baffle board 63 and two places at about center, be provided with this baffle board 64; As required, also can be in a place or the place more than three be provided with (referring to Figure 1A, Figure 1B, Fig. 2).In this case, the oxygen concentration near the atmosphere the motlten metal nozzle 2 can reduce more.Center at roller front atmosphere baffle board 64 is provided with strip through port 642; When making strip, strip is by this strip through port 642.
Figure 1A and for example, Figure 1B and shown in Figure 2, roller top atmosphere baffle board 62 from the place ahead of the direction of rotation of cooling roller 1, rearward extends, and is fixed on the upper end-face edge of this roller the place ahead atmosphere shield 63, is located at the top of cooling roller 1.The purpose that this roller top atmosphere baffle board 62 is set is will interdict atmosphere and be involved in from the top of cooling off roller 1.
Along with advancing to the rear of the direction of rotation of cooling off roller 1, this roller top atmosphere baffle board 62 is near tops of the cooling surface of cooling rollers 1.
In addition, as shown in Figure 4, on atmosphere baffle board 62 above the roller, done nozzle installing hole 621.Motlten metal nozzle 2 connects this nozzle installing hole 621; The front end 21 of the motlten metal ejection portion of motlten metal nozzle 2 is facing to the cooling surface of cooling roller 1.
As shown in Figure 3, crucible 3 is placed among the cylinder 3a.Cylinder 3a owing to covered nozzle installing hole 621, can prevent that atmosphere from flowing into.
And for example shown in Figure 3, on baffle board 62 above this roller, be provided with the hole 622 that the 3rd air current spray nozzle 53 connects usefulness.The 3rd air current spray nozzle 53 connects this hole 622, makes the cooling surface of the front end face of nozzle to cooling roller 1.The 3rd air current spray nozzle 53 from roller direction of rotation the place ahead, is supplied inert gas near puddle.
Because the cooling surface that roller top atmosphere baffle board 62 is arranged near cooling roller 1 like this, makes near the space of weld pool become narrow and small.Because first to the 3rd air current spray nozzle 51～53 is often supplied with this narrow space with a large amount of inert gases, therefore, near the concentration of the inert gas weld pool is very high, and on the contrary, the concentration of oxygen significantly reduces.
The motlten metal nozzle 2 just front end 21 of its motlten metal ejection part connects this roller top atmosphere baffle board 62.The body part of motlten metal nozzle 2 is positioned on this roller top atmosphere baffle board 62, promptly is positioned at the outside of atmosphere cut-off 60.Therefore, the body of motlten metal nozzle 2, crucible 3 and be wound on the outside that heater coil 4 above them all is positioned at the peripheral atmosphere cut-off 60 of this roller.Like this, motlten metal nozzle 2, with respect to this atmosphere cut-off 60, installation and removal easily.
As Figure 1A, Figure 1B and shown in Figure 2, this roller top atmosphere baffle board 62 are the direction of rotation the place aheads from cooling roller 1, towards the smooth extension of aforementioned cooling surface; Yet be not limited thereto, as Fig. 5 A, shown in Fig. 5 B, this roller top atmosphere baffle board 65 also can be from cooling roller direction of rotation the place ahead, extends towards aforementioned cooling surface, simultaneously again towards the interior curve of the peripheral atmosphere cut-off 60 of roller.Adopt this roller top atmosphere baffle board 65, also can interdict the atmosphere that flows into from opening 641, reduce near the oxygen concentration of weld pool.
And for example Fig. 6 A shown in Fig. 6 B, on atmosphere baffle board 62 above this roller, also can be provided with demarcation strip 66 more than one at least, that highlight towards atmosphere cut-off 60 inside.By forming demarcation strip 66, blocking can reduce near the oxygen concentration of weld pool more from the atmosphere that opening 641 flows into.In addition, as Fig. 6 A, shown in Fig. 6 B, these demarcation strips 66 are not outstanding towards the direction of rotation of cooling roller 1, but outstanding towards vertical below, the effect of the oxygen concentration that so yet can be reduced.
In addition, as Fig. 7 A, Fig. 7 B and Fig. 8 A shown in Fig. 8 B, also can be provided with roller side atmosphere baffle board 67, the peripheral atmosphere baffle board 68 of roller and roller rear atmosphere baffle board 69 as atmosphere cut-off 60.
As Fig. 7 A, Fig. 7 B and Fig. 8 A, shown in Fig. 8 B, roller side atmosphere baffle board 67 is the big circular plate shape of diameter ratio cooling roller, it and two contacts side surfaces cooling off roller 1.In addition, this roller side atmosphere baffle board 67 extends towards the rear of cooling roller 1 from roller the place ahead atmosphere baffle board 63.
The purpose of this roller side atmosphere baffle board 67 is set, and is will interdict atmosphere to be involved in from the side of cooling off roller 1.
In addition, this roller side atmosphere baffle board 67 and roller the place ahead atmosphere baffle board 63 also can be made of one.
The peripheral atmosphere baffle board 68 of roller is configured on the outer circumferential edges of this roller side atmosphere baffle board 67, surrounds the excircle of cooling roller 1.Cooling roller 1 is configured in the space that is made of peripheral atmosphere baffle board 68 of this roller and a pair of roller side atmosphere baffle board 63.The peripheral atmosphere baffle board 68 of this roller can improve the atmosphere blocking effect that is produced by roller surface atmosphere baffle board 61 more.
Fig. 8 A and for example, shown in Fig. 8 B, roller rear atmosphere baffle board 69 is the width big disk construction of width than cooling roller 1, its objective is that will interdict atmosphere is involved in from the rear lower portion of cooling roller 1.
Each above atmosphere baffle board 61～69 can use separately, also can a plurality ofly use together.When whole atmosphere baffle board 61～69 is set, almost cooling roller 1 can be surrounded, like this,, can improve the effect that reduces near the oxygen concentration weld pool to greatest extent from the air-flow of aforementioned first to fourth air current spray nozzle 51～54 ejections.Under the situation of each atmosphere baffle board 61～69 more than using separately, the most pronounced effects that the amount of oxygen of roller surface atmosphere baffle board 61, roller top atmosphere baffle board 62 and roller side atmosphere baffle board 63 reduces.
In addition, at Figure 1A, Figure 1B to Fig. 7 A, in the metal sheet band manufacturing installation shown in Fig. 7 B, this roller front atmosphere baffle board 64 is arranged on two places, and the space between them becomes atmosphere and is detained part 80.
In Figure 1A to Fig. 7 B, atmosphere is detained the outside that part is located at the peripheral atmosphere cut-off 60 of this roller, also can be located at the inside of atmosphere cut-off 60.In addition, if atmosphere is detained the peristome area of the aforementioned atmosphere cut-off 60 of open area ratio of part 80 when big, can improve the atmosphere retention effect.In addition, adopt a plurality of demarcation strips to separate, the atmosphere retention effect can improve in this atmosphere delay portion 80.
Metal sheet band manufacturing installation shown in Figure 1A to Fig. 7 B, adopted the crucible 3 of low capacity, therefore making continuously under the situation of a large amount of metal sheet bands, in the metal sheet band manufacturing installation that constitutes by element shown in Figure 9, also can use air-flow of the present invention, atmosphere cut-off and atmosphere are detained part.Be metal sheet band manufacturing installation shown in Figure 9, motlten metal 19 remains in the calciner 20, from the outlet of these calciner 20 bottoms, through flowing out pipe 21, is supplied in the pans 22 again.In the bottom of these pans 22, be provided with motlten metal nozzle 2, motlten metal is injected into from this motlten metal nozzle 2 on the surface of the cooling roller 1 that rotates at a high speed, forms strip through supersolidification.Utilize this device, when the motlten metal in the pans 22 reduces,, therefore be applicable to continuous production owing to can one by one motlten metal be supplemented to the pans 22 from calciner 20.
Below, with reference to accompanying drawing metal sheet band manufacturing installation as the second embodiment of the present invention is described.
At Figure 12 A, Figure 12 B, in Figure 13 and the metal sheet band manufacturing installation of the present invention shown in Figure 4, motlten metal is injected on the cooling surface 1a of cooling roller 1 of rotation, and cooling surface 1a promptly obtains metal sheet band with this molten metal cooling.
This metal sheet band manufacturing installation is made of following parts basically: cooling roller 1; Motlten metal nozzle 2 with the lower end of the crucible 3 of preserving motlten metal is connected is wound on the heater coil 4 on motlten metal nozzle 2 and crucible 3 excircles; At least be from the position 1b that cooling surface 1a peels off from the ejection part front end of motlten metal nozzle 2 to metal sheet band, direction of rotation along cooling roller 1, be covered with cooling surface 1a, prevent that the rotation owing to cooling roller 1 is involved in the atmosphere cut-off 60 of atmosphere; From motlten metal nozzle 2 and the relative position of cooling roller 1, with the opposite direction of direction of rotation of cooling roller 1, as the roller surface atmosphere baffle board 61 of the roller surface atmosphere cut-off that is connected with cooling surface 1a; As the peripheral atmosphere baffle board 68 of the roller of the peripheral atmosphere cut-off of roller; As first to fourth air current spray nozzle 51～54 that inert gas is injected near the first air-flow feedway the motlten metal nozzle 2; Spray the 5th air current spray nozzle 55 of the second air-flow feedway of inert gas as cooling surface 1a to cooling roller 1; Be detained part 80 with atmosphere.
Cooling roller 1 drives rotation by the motor that does not illustrate among the figure along the direction of arrow (counterclockwise).The cooling surface 1a of cooling roller 1 is preferably by carbon steel (for example, Fe such as JIS S 45C base alloy), or brass (Cu-Zn alloy), or blunt copper becomes.When the cooling surface 1a of cooling roller 1 was brass or fine copper, because the heat conductivity height, therefore good cooling results was suitable for the rapid cooling of motlten metal.In order to improve cooling effect, preferably inside is provided with water-cooling structure.
In Figure 13, the motlten metal of fusion in crucible 3 from the motlten metal nozzle 2 of lower end, is sprayed onto on the cooling surface 1a of cooling roller 1.The top of crucible 3 is by supply pipe 7, is connected with gas supply source 8 such as Ar gas, simultaneously, pressure-regulating valve 9 and magnetic valve 10 is installed on supply pipe 7, and Pressure gauge 11 is installed on the supply pipe 7 between pressure-regulating valve 9 and the magnetic valve 10.Auxiliary piping 12 is connected in parallel with supply pipe 7, pressure-regulating valve 13 is installed, flow control valve 14 and flowmeter 15 on auxiliary piping 12.Therefore, gases such as Ar gas are supplied in the crucible 3 from source of the gas 8, can make motlten metal, towards 1 ejection of cooling roller from motlten metal nozzle 2.
When making metal sheet band, by making cooling roller 1 rotation at a high speed, simultaneously from being positioned near the cooling roller top, perhaps a little forwards motlten metal nozzle 2 from the top, the ejection motlten metal, sharply cooling on the surface of cooling roller 1 again, therefore, along the direction of rotation of cooling roller 1, form band shape and pull out.The motlten metal ejiction opening of motlten metal nozzle 2 is a rectangle, and ejection width (width of the direction of rotation of cooling roller 1) preferably is about 0.2～0.8 millimeter.When below 0.2 millimeter the time, the composition of motlten metal is easily with the motlten metal spray nozzle clogging; When surpassing 0.8 millimeter, cool off very thorough difficultly.
When making metal sheet band, the interval of cooling roller 1 and motlten metal nozzle 2 can be selected in 0.1～0.8 millimeter scope.When below 0.1 millimeter the time, motlten metal ejection difficulty can cause the breakage of motlten metal nozzle 2; But when surpassing 0.8 millimeter, obtain relatively difficulty of the good strip of performance and shape.Utilize the lowering or hoisting gear that does not illustrate among the figure can make crucible 3 liftings, thereby can adjust the interval of cooling roller 1 and motlten metal nozzle 2.After beginning from the metal sheet band manufacturing, temperature rising surface heat expands, and the diameter of cooling roller 1 increases, and is therefore best in order to make the high strip of thickness of slab precision, after manufacturing begins, the interval of cooling roller 1 and motlten metal nozzle 2 is increased at leisure.
Figure 12 A and for example, shown in Figure 12 B, the front lower place in the direction of rotation of cooling roller 1 is provided with strip guided plate 70 and scraper plate 72.Motlten metal cools off the metal sheet band that forms on cooling surface 1a, peeled off from cooling roller 1 by scraper plate 72, by strip guided plate 70 guiding, through through port 641, exports the outside of metal tape manufacturing installation to again.Therefore, just become metal sheet band near the scraper plate 72 from position 1b that cooling surface 1a peels off.
Figure 12 A for another example, Figure 12 B, Figure 13 and shown in Figure 4, roller surface atmosphere baffle board 61 are positioned at and leave motlten metal nozzle 2 and the relative position of cooling roller, at the rear of the direction of rotation of cooling roller 1; It is the platy structure with front end of acute angle, and the front end of its acute angle contacts with the surface of cooling roller 1.The purpose that roller surface atmosphere baffle board 61 is set is will interdict attached to cooling roller 1 lip-deep atmosphere to be involved near the weld pool.When cooling roller 1 rotates with high speed, utilize this roller surface atmosphere baffle board 61, can separate and interdict attached to cooling roller 1 lip-deep atmosphere, prevent that it is involved near the weld pool.
As the peripheral atmosphere baffle board 68 of the roller of the peripheral atmosphere cut-off of roller, the position 1b that peels off from aforementioned metal sheet band and cooling surface 1a, direction of rotation along cooling roller 1 extends to the position that is provided with roller surface atmosphere baffle board 61 (roller surface atmosphere cut-off); To cool off roller 1 and be surrounded, be covered with cooling surface 1a, leave an intersegmental crack with cooling surface 1a.
The inert gas that is undertaken by the first air-flow feedway is supplied with, and can be the rear of benchmark and the place ahead either party from motlten metal nozzle 2, or carries out two aspects.Best, respectively from rear and the place ahead, supply with the air-flow of two system.
In Figure 13, first air current spray nozzle 51 is the same with aforesaid first embodiment, is a kind of device that is configured in the device rear, above-mentioned two system air feed that is benchmark with motlten metal nozzle 2.This first air current spray nozzle 51 roughly from the tangential direction at rear of cooling roller 1, is delivered to gas (hereinafter referred to as puddle) near the front end of motlten metal nozzle 2.As Figure 11 A, shown in Figure 11 B, it is 5 millimeters more tiny slit 510 that first air current spray nozzle 51 has width, therefore, can spray gas fast.
Second air current spray nozzle 52 also is a kind of device that carries out in the device of above-mentioned two system air feed.In order to interdict with atmosphere from the gas of first air current spray nozzle 51 ejection, prevent that atmosphere is involved in and carries out air feed, this second air current spray nozzle 52 is arranged between the motlten metal nozzle 2 and first air current spray nozzle 51.As Figure 10 A, shown in Figure 10 B, second air current spray nozzle 52 has the slit 520 of 20 mm wides wideer than first air current spray nozzle 51, and therefore, the flow velocity of the velocity ratio first air current spray nozzle air feed of its air feed is low.
And for example shown in Figure 13, because first and second air current spray nozzles 51 and 52, be configured between this roller surface atmosphere baffle board 61 and the motlten metal nozzle 2, be after this roller surface atmosphere baffle board 61 is with the atmosphere blocking, just supply with inert gas, therefore, can improve the effect that near the oxygen concentration of weld pool reduces.In addition, be involved near the weld pool, polylith roller surface atmosphere baffle board 61 can be set in order to interdict atmosphere effectively.
The 3rd air current spray nozzle 53 also is a kind of device that is configured in the above-mentioned two system feeder in the place ahead that is benchmark with motlten metal nozzle 2, its objective is to prevent that atmosphere is involved in from the place ahead of the direction of rotation of cooling roller 1.The shape of the 3rd air current spray nozzle 53 is identical with the shape of second air current spray nozzle 52, but the width of its slit 540 is less, has only 2.5 millimeters.
As Figure 12 A, shown in Figure 12 B, the 4th air current spray nozzle 54 also is a kind of device that is used for being configured at the device of the two system air feed in motlten metal nozzle 2 the place aheads, it is arranged on the upper front end of the peripheral atmosphere cut-off 60 of roller, its objective is to prevent that atmosphere is involved in from the opening 641 on the front, the place ahead that is positioned at cooling roller 1.As Figure 10 A, shown in Figure 10 D, the shape of the 4th air current spray nozzle 54 is identical with the second, the three air current spray nozzle 52,53, and the width of its slit 550 is 3 millimeters.
More than first to fourth air current spray nozzle can use separately, also can a plurality ofly be used in combination.Reduce near the effect of the oxygen of weld pool, with the first and second air current spray nozzle maximums.
In first to fourth air current spray nozzle, as first air current spray nozzle 51 of Figure 13 as shown in the embodiment like that, the connecting line 17 of pressure-regulating valve 16 by connecting is connected with supply source 18.
Secondly, as Figure 12 A, shown in Figure 12 B, the supply of the inert gas that is undertaken by the second air-flow feedway, be towards the cooling surface 1a's that cools off roller 1, and be from atmosphere cut-off 60 (the preferably position 1b that peels off from metal sheet band and cooling surface 1a) is set, to what carry out between the position that is provided with roller surface atmosphere baffle board 61.
At Figure 12 A, among Figure 12 B, the 5th air current spray nozzle 55 as the second air-flow feedway, 1a stands away with cooling surface, it roughly be positioned at cooling roller 1 under, from the hole 68a that makes in the optional position of the peripheral atmosphere baffle board 68 of roller, 1a is relative with cooling surface, therefore, gas is sprayed towards cooling surface 1a.
As Figure 11 A, Figure 11 B, shown in Figure 11 C, the width of the slit 550 of the 5th air current spray nozzle 55 is less, is 3 millimeters, therefore, flow velocity ejection gas that can be higher.
From the inert gas that the 5th air current spray nozzle is sent, mobile along the direction of rotation of cooling roller 1 on cooling surface 1a by the rotation of cooling roller 1, arrive near the roller surface atmosphere baffle board 61.Roller surface atmosphere baffle board 61 is configured to cooling surface 1a approaching, but between this roller surface atmosphere baffle board 61 and cooling surface 1a small gap is arranged.Therefore, the inert gas along cooling surface 1a flows can pass through this gap, near the inflow motlten metal nozzle 2, thereby can reduce near the oxygen concentration of weld pool.
In addition, by the peripheral atmosphere baffle board 68 of roller is set, can reduce near the oxygen concentration of weld pool more.Reason is, because cooling surface 1a is covered by the peripheral atmosphere baffle board 68 of roller, from the 5th air current spray nozzle 55 along cooling surface 1a, flow to the inert gas of roller surface atmosphere baffle board 61, on the interval before reaching roller surface atmosphere baffle board 61, can not spread, therefore more inert gas is arranged, by this roller surface atmosphere baffle board 61, flow near the weld pool.
Like this, by the 5th air current spray nozzle 55 is configured in the cooling roller 1 under, this roller surface atmosphere baffle board 61 is arranged on the rear of direction of rotation that position with motlten metal nozzle 2 is the cooling roller 1 of benchmark, in addition, again around motlten metal nozzle 2, dispose first to fourth air current spray nozzle 51～54, can reduce near the oxygen concentration of weld pool.
In addition, dispose the position of the 5th air current spray nozzle, be not limited to cool off roller 1 under, also can be configured near the position 1b that peels off from metal sheet band and cooling surface 1a, between the position that is provided with roller surface atmosphere baffle board 61.
For example, as Figure 14 A, shown in Figure 14 B, be located near metal sheet band and the position 1b that peels off of cooling roller the 5th air current spray nozzle 55 also passable.In this case, the 5th air current spray nozzle 55 connects roller the place ahead atmosphere baffle board 63, and from the side of cooling roller 1,1a is relative with cooling surface.
At this moment, from the inert gas of the 5th air current spray nozzle 55 ejections, the direction of rotation along cooling roller 1 flows to this roller surface atmosphere baffle board 61; Simultaneously, towards the opposite direction of the direction of rotation of cooling off roller, mobile again towards the direction of motlten metal nozzle 2.
When utilizing metal sheet band manufacturing installation of the present invention to make strip, preferably before 1 rotation of cooling roller, supply with inert gas with air current spray nozzle 51～55.Compare with the situation of just supplying with inert gas after the rotation of cooling roller, beginning is just supplied with under the situation of inert gas before rotating from the cooling roller, and the concentration of oxygen can reduce rapidly.Therefore, measure near the oxygen concentration of motlten metal nozzle, after reaching the oxygen concentration of regulation, make 1 rotation of cooling roller again, can enhance productivity.
In the present invention, as the condition of being supplied with inert gas by the first air-flow feedway, desirable flow is 200～2000 liters/minute, preferably 1830 liters/minute.When flow below 200 liters/minute the time, do not reach the effect that reduces near the amount of oxygen the motlten metal nozzle; And when surpassing 2000 liters/timesharing, atmosphere may since gas flow and from around be involved in, the effect of reduction oxygen concentration also diminishes, and does not reach the effect that matches with air demand.
In this case, be preferably in from the two system air-flow of rear air feed, the flow of aforementioned one air-flow (air-flow of first air current spray nozzle ejection) is 5～400 liters/minute; The flow of aforementioned another strand air-flow (air-flow of second air current spray nozzle ejection) is 5～400 liters/minute.From the two system air-flow of the place ahead air feed, the flow of aforementioned one air-flow (air-flow of the 3rd air current spray nozzle ejection) is 5～400 liters/minute; And the flow of another strand air-flow (air-flow of the 4th air current spray nozzle ejection) is 300～600 liters/minute.The parameter area of first to fourth strand of air-flow preferably is respectively: main air-flow is 250～350 liters/minute, is preferably 300 liters/minute; Secondary air flow-flow is 230～330 liters/minute, is preferably 280 liters/minute; The 3rd strand of air-flow-flow is 200～300 liters/minute, is preferably 250 liters/minute; The 4th strand of air-flow-flow is 450～550 liters/minute.
Particularly, if the flow of the 4th strand of air-flow (is being preferably 500 liters/minute) more than 450 liters/minute, can reduce near the oxygen concentration of weld pool more.
In the present invention, as the condition of being supplied with inert gas by the second air-flow feedway, desirable flow is 400～600 liters/minute, is preferably 500 liters/minute.When flow less than 400 liters/timesharing, do not reach the effect of the amount of oxygen near the atmosphere that reduces the motlten metal nozzle; And, can not get the effect that matches with air demand when surpassing 600 liters/timesharing.
Therefore, the flow of the 5th air current spray nozzle 55 is preferably 400～750 liters/minute.The desirable parameter area of the 5th strand of air-flow is: flow is 450～550 liters/minute, is preferably 500 liters/minute.
As the used inert gas of metal sheet band manufacture method of the present invention, can be from N 2, select among He, Ar, Kr, Xe and the Rn one or more, will know from embodiment described later, preferably Ar.
Secondly, atmosphere cut-off 60 is described.
As Figure 12 A, Figure 12 B, Figure 13 and Figure 14 A are shown in Figure 14 B, atmosphere cut-off 60 of the present invention has following parts at least: the position with motlten metal nozzle 2 is a benchmark, is positioned at the roller front atmosphere shield 64 in the front, the place ahead of the direction of rotation of cooling off roller 1; Be positioned at direction of rotation the place ahead of cooling roller 1, a pair of roller the place ahead atmosphere shield 63 of clamping cooling roller 1, contacting with aforementioned roller front atmosphere shield 64; Be positioned at the upper end, direction of rotation the place ahead of cooling roller 1, the roller top atmosphere baffle board 62 that contacts with the upper end-face edge of this roller the place ahead atmosphere shield 63; Cool off roller 1 with clamping, a pair of roller side atmosphere baffle board 67,67 that contacts with this roller the place ahead atmosphere baffle board 63 and the peripheral atmosphere cut-off of roller.
As Figure 12 A, Figure 12 B and Figure 14 A, shown in Figure 14 B, the purpose that roller the place ahead atmosphere baffle board 63 is set is will interdict atmosphere to be involved in from the place ahead, both sides of cooling off roller 1.
In addition, the purpose that roller front atmosphere baffle board 64 is set is will interdict atmosphere to be involved in from the place ahead relative with the cooling surface of cooling roller 1.In the present embodiment, this baffle board 64 is arranged on the front end of roller the place ahead atmosphere baffle board 63 and two places of approximate center; Yet, as required, also can be arranged on a place, or the place more than three (referring to Figure 12 A, Figure 12 B, Figure 14 A, Figure 14 B).In this case, can reduce oxygen concentration near the motlten metal nozzle 2 the atmosphere more.In addition, at the center of roller front atmosphere baffle board 64, make strip through port 641, when making strip, strip is by this strip through port 641.
Figure 12 A and for example, Figure 12 B and Figure 14 A, shown in Figure 14 B, roller top atmosphere baffle board 62, it from position the place ahead of direction of rotation of the cooling roller 1 of benchmark with motlten metal nozzle 2, rearward extend, be fixed on the upper end-face edge of roller the place ahead atmosphere shield 63, be located at the top of cooling roller 1.The purpose that this roller top atmosphere baffle board 62 is set is will interdict atmosphere to be involved in from the top of cooling off roller 1.
This roller top atmosphere baffle board 62 is made along with advancing to the rear of the direction of rotation of cooling off roller 1, moves closer to the top of the cooling surface 1a of cooling roller 1.
And for example shown in Figure 4, on atmosphere baffle board 62 above this roller, be provided with nozzle installing hole 621.Motlten metal nozzle 2 connects this nozzle installing hole 621, and the front end 21 of its ejection part is relative with the cooling surface 1a of cooling roller 1.
As shown in figure 13, crucible 3 is placed among the cylinder 3a.Cylinder 3a covers this nozzle installing hole 621, can prevent that atmosphere from flowing into.
And for example Figure 13 and shown in Figure 4 on atmosphere baffle board 62 above the roller, does the hole 622 that the 3rd air current spray nozzle 53 connects usefulness.The 3rd air current spray nozzle 53 connects this hole 622, and the front end of nozzle is relative with the cooling surface of cooling roller 1.The 3rd air current spray nozzle 53 with inert gas the place ahead from the roller direction of rotation, is delivered near the weld pool.
Because the roller top atmosphere baffle board 62 cooling surface 1a near cooling roller 1, therefore, near the space the weld pool becomes narrow and small.Because first to the 3rd air current spray nozzle 51～53 is often supplied with a large amount of inert gases to this small space, therefore, near weld pool, inert gas concentration is very high, and opposite, oxygen concentration significantly reduces.
In addition, motlten metal nozzle 2 has only the front end 21 of its ejection part, connects this roller top atmosphere baffle board 62.The body part of motlten metal nozzle 2 is positioned on this roller top atmosphere baffle board 62, promptly is positioned at the outside of atmosphere cut-off 60.Therefore, the body of motlten metal nozzle 2, crucible and be wound on the outside that heater coil 4 above them all is positioned at atmosphere cut-off 60.Like this, motlten metal nozzle 2 is installed easily and is unloaded with respect to atmosphere cut-off 60.
As Figure 12 A, Figure 12 B and Figure 14 A, shown in Figure 14 B, roller top atmosphere baffle board 62 is the direction of rotation the place aheads from cooling roller 1, towards the smooth extension of aforementioned cooling surface; But might not be confined to like this, as Figure 15 A, shown in Figure 15 B, also can make atmosphere baffle board 65 direction of rotation the place aheads from cooling roller 1, roller top, extend towards cooling surface, the while is towards the interior curve of atmosphere cut-off 60.If utilize this roller top atmosphere baffle board 65, can interdict the atmosphere that flows into from opening 641, and reduce near the oxygen concentration the weld pool.
And for example Figure 16 A shown in Figure 16 B, on atmosphere baffle board 62 above this roller, also can be provided with at least more than one towards atmosphere cut-off 60 inner outstanding demarcation strips 66.By forming demarcation strip 66, can interdict the atmosphere that flows into from opening 641, reduce near the oxygen concentration of weld pool more.At Figure 16 A, can find out also among Figure 16 B that this demarcation strip 66 not only direction of rotation towards cooling roller 1 is outstanding, and outstanding towards vertical lower, can reach the effect that reduces oxygen concentration like this.
As Figure 12 A, Figure 12 B, Figure 14 A, Figure 14 B, Fig. 8 A, shown in Fig. 8 B, roller side atmosphere baffle board 67 for diameter than the big circular plate shape of cooling roller 1, it and two contacts side surfaces of cooling roller 1.In addition, this roller side atmosphere baffle board 67 from roller the place ahead atmosphere baffle board 63, extends to the rear of cooling roller 1.
The purpose that this roller side atmosphere baffle board 67 is set is will interdict atmosphere to be involved in from the side of cooling off roller 1.
In addition, roller side atmosphere baffle board 67 also can be made of one with roller the place ahead atmosphere baffle board 63.
Cooling roller 1 is configured in the space that is made of peripheral atmosphere baffle board 68 of roller and a pair of roller side atmosphere baffle board 67.The peripheral atmosphere baffle board 68 of roller can improve the atmosphere blocking effect that is produced by roller surface atmosphere baffle board 61 more.
As Fig. 8 A, shown in Fig. 8 B, roller rear atmosphere baffle board 69 also can be set as atmosphere cut-off 60.Roller rear atmosphere baffle board 69 is the width big disk construction of width than cooling roller 1, its objective is that the blocking atmosphere is involved in from the rear lower portion of cooling roller 1.
More than each atmosphere baffle board 61～65,67～69 can use separately, also can be a plurality of use together.When whole atmosphere baffle boards 61～65 is set, 67～69 o'clock, almost cooling roller 1 can be surrounded, like this, utilization can improve the effect that reduces near the oxygen concentration of weld pool to greatest extent from the air-flow of aforementioned first to the 5th air current spray nozzle 51～55 ejections.
In addition, as Figure 12 A, Figure 12 B, Figure 14 A, Figure 14 B, Figure 16 A, in the metal sheet band manufacturing installation shown in Figure 16 B, roller front atmosphere baffle board 64 is arranged on two places, and the space between them becomes atmosphere and is detained part 80.At Figure 12 A, Figure 14 A, among Figure 16 A, atmosphere is detained the outside that part 80 is located at atmosphere cut-off 60, and it also can be arranged on the inside of atmosphere cut-off 60.In addition, if the opening portion area of the open area ratio atmosphere cut-off 60 of atmosphere delay part 80 is big, then can improve the atmosphere retention effect.In addition, utilize the polylith demarcation strip that atmosphere is detained part 80 and separate, also can improve the atmosphere retention effect.
Figure 12 A, Figure 14 A, metal sheet band manufacturing installation shown in Figure 16 A adopts the crucible 3 of low capacity, making continuously under the situation of a large amount of metal sheet bands, in the metal sheet band manufacturing installation that basic structure shown in Figure 9 constitutes, also can adopt air-flow of the present invention, atmosphere cut-off and atmosphere are detained part.That is: in the metal sheet band manufacturing installation shown in Figure 9, motlten metal 19 remains in the calciner 20, and it can flow in the pans 22 from the outlet at bottom of this calciner 20 through flowing out pipeline 21.In the bottom of these pans 22 motlten metal nozzle 2 is housed, motlten metal is injected on the surface of the cooling roller 1 that rotates at a high speed from this nozzle 2, through supersolidification, forms strip.When adopting this device, when the motlten metal in the pans 22 reduces,, therefore be suitable for continuous production because motlten metal can little by little be supplemented to these pans 22 from calciner 20.
Below, refer again to accompanying drawing the third embodiment of the present invention is described.
At Figure 1A, Figure 1B, among Fig. 2 and Fig. 4, the metal sheet band manufacturing installation of present embodiment is injected into motlten metal on the cooling surface 1a of cooling roller 1 of rotation, and this cooling surface 1 makes the motlten metal cooling and obtains metal sheet band.
This metal sheet band manufacturing installation is made of following parts basically: cooling roller 1; The motlten metal nozzle 2 that is connected with the lower end of the crucible 3 of adorning motlten metal; Be wound on the heater coil 4 on motlten metal nozzle 2 and crucible 3 excircles; At least from the ejection part front end of motlten metal nozzle 2, the position 1b that peels off to metal sheet band and cooling surface 1a, direction of rotation along cooling roller 1 is covered with cooling surface 1a, prevents the atmosphere cut-off 60 that atmosphere is involved in owing to the rotation of cooling off roller 1; Be positioned at and leave motlten metal nozzle 2 and the relative position of cooling roller 1, on the opposite direction of the direction of rotation of cooling roller 1, as the roller surface atmosphere baffle board 61 of the roller surface atmosphere cut-off that contacts with cooling surface 1a; As the peripheral atmosphere baffle board 68 of the roller of the peripheral atmosphere cut-off of roller; As the first to fourth and the 6th air current spray nozzle 51,52,53,54,56 that is used for being sprayed onto near the first air-flow feedway the motlten metal nozzle 2 to two kinds of inert gases of major general; The 5th air current spray nozzle 55 as the second air-flow feedway that inert gas is sprayed onto the cooling surface 1a that cools off roller 1; Be detained part 80 with atmosphere.
In this metal sheet band manufacturing installation, from least two kinds of inert gases that the first air-flow feedway is sent, near the inflow motlten metal nozzle 2.Heavier inert gas in aforementioned two kinds of inert gases under the lighter inert gas in atmosphere cut-off 60, forms heavy layer of inert, and near the inert gas concentration of weld pool is risen.In addition, from the inert gas that the second air-flow feedway is sent, the direction of rotation of edge cooling roller, on the cooling surface of cooling roller 1, flow, it flows near the motlten metal nozzle by roller surface atmosphere baffle board, and near motlten metal nozzle 2 oxygen concentrations are reduced.
Cooling roller 1 drives rotation by the motor that does not illustrate among the figure towards direction shown in the arrow (counterclockwise).The cooling surface 1a of cooling roller 1, preferably by carbon steel (for example Fe such as JIS S45C base alloy), or brass (Cu-Zn alloy), or fine copper is made.When the cooling surface 1a of cooling roller 1 was made by brass or fine copper, because heat conductivity is good, good cooling results was suitable for motlten metal and sharply cools off.In order to improve cooling effect, be preferably in the cooling roller water-cooling structure is set.
In Figure 18, the motlten metal of fusion in crucible 3 from the motlten metal nozzle 2 of lower end, is injected on the cooling surface 1a of cooling roller 1.The top of crucible 3 by supply pipe 7, is connected with sources of the gas 8 such as Ar gas.Simultaneously, on supply pipe 7, pressure-regulating valve 9 and magnetic valve 10 are installed; On supply pipe 7, between pressure-regulating valve 9 and magnetic valve 10, Pressure gauge 11 is installed.Auxiliary piping 12 is connected in parallel with supply pipe 7, on auxiliary piping 12, pressure-regulating valve 13 is installed, flow control valve 14 and flowmeter 15.Therefore, source of the gas 8 is supplied to gases such as Ar gas in the crucible 3, and molten metal is injected on the cooling roller 1 then from motlten metal nozzle 2.
When making metal sheet band, cooling roller 1 is with rotation at a high speed, simultaneously by from being configured near the roller top, or in the motlten metal nozzle 2 a little on the front of top, spray motlten metal, rapid cooling curing on the surface of cooling roller 1, direction of rotation along cooling roller 1 forms band shape, pulls out.The ejiction opening of motlten metal nozzle 2 is a rectangle, and its ejection width (width on the direction of rotation of cooling roller 1) is preferably 0.1～0.8 millimeter.When below 0.1 millimeter the time, the composition of motlten metal is easily with the motlten metal spray nozzle clogging; When surpassing 0.8 millimeter, fully cooling raio is difficult.
When making metal sheet band, the interval between cooling roller 1 and the motlten metal nozzle 2 can be selected in 0.1～0.8 millimeter scope.When below 0.1 millimeter the time, the motlten metal ejection is difficulty relatively; Can cause 2 breakages of motlten metal nozzle; But when surpassing 0.8 millimeter, the good strip of manufacturing property and shape is difficulty.
Crucible 3 can utilize the lowering or hoisting gear lifting that does not illustrate among the figure, thereby can adjust the interval between cooling roller 1 and the motlten metal nozzle 2.Because after the metal sheet band manufacturing began, temperature rose, surface heat expands, the enlarged-diameter of cooling roller 1, therefore, in order to make the high strip of thickness of slab precision, be preferably in make beginning after, increase the interval between cooling roller 1 and the motlten metal nozzle 2 at leisure.
In addition, as Figure 17 A, shown in Figure 17 B, the front lower place in the direction of rotation of cooling off roller 1 is provided with strip guided plate 70 and scraper plate 72.Motlten metal cools off on cooling surface 1a, forms metal sheet band, by scraper plate strip is peeled off from cooling roller 1, again by strip guided plate 70 guiding, by through port 641, exports metal sheet band manufacturing installation outside to.Therefore, just become the position 1b that metal sheet band and cooling surface 1a peel off near the scraper plate 72.
Figure 17 A and for example, Figure 17 B, Figure 18 and shown in Figure 4, roller surface atmosphere baffle board 61 are positioned at from the relative position of motlten metal nozzle 2 and cooling roller 1, at the rear of cooling roller 1 direction of rotation; It is the platy structure with front end of acute angle, and the front end of its acute angle contacts with the surface of cooling roller 1.The purpose of this roller surface atmosphere baffle board 61 is set, and is the lip-deep atmosphere that will interdict attached to cooling roller 1, prevents that it is involved near the weld pool.When cooling roller 1 rotates at a high speed,, separated blocking by this baffle board 61 attached near the lip-deep atmosphere that will be involved in the weld pool of cooling roller 1.
As the peripheral atmosphere baffle board 68 of the roller of the peripheral atmosphere cut-off of roller, the position 1b that peels off from aforementioned metal sheet band and cooling surface 1a, direction of rotation along cooling roller 1, extend to the position that is provided with roller surface atmosphere baffle board 61 (roller surface atmosphere cut-off), to cool off roller 1 is surrounded, be covered with cooling surface 1a, 1a stands away with cooling surface.
The supply of the inert gas that first gas supply device carries out, preferably by array apparatus realization down: being arranged on motlten metal nozzle 2 is first and second air current spray nozzles 51,52 at the rear of benchmark; Be located at third and fourth air current spray nozzle 53,54 in the place ahead; Surrounding the air-flow of the 6th air current spray nozzle 56 ejection of the front end of aforementioned motlten metal nozzle 2 supplies with.
In Figure 18, first air current spray nozzle 51 is a kind of device in the device supplied with of the air-flow at the rear of benchmark for being arranged on motlten metal nozzle 2.This first air current spray nozzle 51 roughly from the tangential direction at rear of cooling roller 1, is injected into gas (forming part hereinafter referred to as weld pool) near the front end of motlten metal nozzle 2.As Figure 11 A, shown in Figure 11 B, the width of the slit 510 of first air current spray nozzle 51 is less, is 5 millimeters, so can be with bigger flow velocity ejection gas.
Second air current spray nozzle 52 also is a kind of device that is used for being located at the device that the air-flow at rear supplies with.This second air current spray nozzle 52 is injected into gas from the air-flow of first air current spray nozzle, 51 ejections, will be used to the air feed that prevents that atmosphere is involved in from the air-flow and the atmosphere blocking of first air current spray nozzle, 51 ejections; It is arranged between the motlten metal nozzle 2 and first air current spray nozzle 51.As shown in Figure 9, it has width 20 millimeter the slit 520 wideer than the slit of first air current spray nozzle 51, therefore, and flow velocity air feed that can be lower than main air.
And for example shown in Figure 180, because first and second air current spray nozzles 51,52 are arranged between roller surface atmosphere baffle board 61 and the motlten metal nozzle 2, therefore, can be after roller surface atmosphere baffle board 61 have interdicted atmosphere, resupply inert gas, like this, can improve and reduce the effect that weld pool forms near the oxygen concentration of part.In addition, be involved in weld pool and form near the part, a plurality of roller surface atmosphere baffle boards 61 can be set in order to interdict atmosphere effectively.
It is a kind of device in the feeder in the place ahead of benchmark that the 3rd air current spray nozzle 53 is provided in a side of with motlten metal nozzle 2.The purpose that this 3rd air current spray nozzle 53 is set is to prevent that atmosphere is involved in from direction of rotation the place ahead of cooling roller 1.As shown in Figure 9, the shape of the 3rd air current spray nozzle 53 is identical with the shape of second air current spray nozzle 52, but its slit 540 width are less, are 2.5 millimeters.
As Figure 17 A, shown in Figure 17 B, the 4th air current spray nozzle 54 is a kind of devices that are used for being arranged on the feeder in motlten metal nozzle 2 the place aheads.It is arranged on the upper front end of the peripheral atmosphere cut-off 60 of roller, its objective is to prevent that atmosphere is involved in from the opening portion 641 in the front, the place ahead of cooling roller 1.As shown in Figure 9, the shape of the 4th air current spray nozzle 54 is identical with the second and the 3rd air current spray nozzle 52,53, and its slit width is 3 millimeters.
The 6th air current spray nozzle 56 surrounds the front end of aforementioned motlten metal nozzle 2, and it is the air-flow feedway that surrounds this front end.The 5th air current spray nozzle 56 is used for the front end gas jet round motlten metal nozzle 2.As Figure 19 A, shown in Figure 19 B, the 6th air current spray nozzle 56 is to be 6 millimeters pipe 561 with external diameter, and making external diameter is 57 millimeters, and internal diameter is that 45 millimeters annular pipe constitutes.On aforementioned the 6th air current spray nozzle 56, enclose from its cylindrical with inboard slightly partially position, the center of inner periphery on, do a plurality of external diameters of arranging in the form of a ring and be 1.5 millimeters hole 562, the spacing 563 between the hole 562 is 3.5 millimeters.
More than the first to fourth and the 6th air current spray nozzle 51,52,53,54,56 can use separately, also can a plurality ofly be used in combination.Weld pool forms the effect that near the amount of oxygen of part reduces, with the first and second air current spray nozzle maximums.
In the first to fourth and the 6th air current spray nozzle 51,52,53,54,56, as first air current spray nozzle 51 of Figure 18 be example represented, the connecting line 17 of pressure-regulating valve 16 by connecting is connected with source of the gas 18.
In addition, as Figure 17 A, shown in Figure 17 B, inert gas by the supply of the second air-flow feedway, be to spray towards the cooling surface 1a that cools off roller 1, preferably air feed is (the preferably position 1b that peels off from metal sheet band and cooling surface 1a) from the position that is provided with atmosphere cut-off 60, carries out between the position that is provided with roller surface atmosphere baffle board 61.
At Figure 17 A, among Figure 17 B, as the 5th air current spray nozzle 55 of second feeder be positioned at cooling roller 1 under, 1a stands away with cooling surface.Its hole 68a from making in the optional position of the peripheral atmosphere baffle board 68 of roller, 1a is relative with cooling surface, and air-flow is sprayed to cooling surface 1a.
As Figure 10 A, Figure 10 B, Figure 10 C, shown in Figure 10 D, slit 550 width of the 5th air current spray nozzle 55 are less, are 2.5 millimeters, therefore can be with bigger flow velocity ejection gas.
From the inert gas of the 5th air current spray nozzle ejection, by the rotation of cooling roller 1,, on cooling surface 1a, flow along the direction of rotation of cooling roller 1, arrive near the roller surface atmosphere baffle board 61.Roller surface atmosphere baffle board 61 contacts with cooling surface 1a, but between aforementioned roller surface atmosphere baffle board 61 and the cooling surface 1a minim gap is arranged.Therefore, the inert gas mobile along cooling surface 1a passes through this gap, flows near the motlten metal nozzle 2, can reduce weld pool and form near the oxygen concentration of part.
In addition, by the peripheral atmosphere baffle board 68 of roller is set, can reduces weld pool more and form near the oxygen concentration of part.Reason is, because cooling surface 1a is covered by the peripheral atmosphere baffle board 68 of roller, from 55 ejections of the 5th air current spray nozzle, flow to the inert gas of roller surface atmosphere baffle board 61 along cooling surface 1a, to between the roller surface atmosphere baffle board 61, can not spread, more inert gas flows into weld pool and forms near the part by roller surface atmosphere baffle board 61.
Like this, by the 5th air current spray nozzle 55 is arranged on the cooling roller 1 under, roller surface atmosphere baffle board 61 is arranged on the rear of direction of rotation that position with motlten metal nozzle 2 is the cooling roller 1 of benchmark, again with the first to fourth and the 6th air current spray nozzle 51,52,53,54,56 be arranged on motlten metal nozzle 2 around, can reduce weld pool and form near the part oxygen concentration.
In addition, the position that the 5th air current spray nozzle is set only is not limited under cooling roller 1, it is arranged near the position 1b that peels off from metal sheet band and cooling surface 1a, to also passable between the position that is provided with roller surface atmosphere baffle board 61.
For example, Figure 23 A shown in Figure 23 B, is located at the 5th air current spray nozzle 55 near metal sheet band and the position 1b that peels off of cooling roller 1 also passable.In this case, the 5th air current spray nozzle 55 connects roller the place ahead atmosphere baffle board 63, and is relative with cooling surface 1a from the side of cooling roller 1.
In this case, from the inert gas of the 5th air current spray nozzle 55 ejections, the direction of rotation along cooling roller 1 flows to roller surface atmosphere baffle board 61; Simultaneously, also, flow towards motlten metal nozzle 2 directions towards the opposite direction of cooling roller direction of rotation.
And for example shown in Figure 19 A, the 6th air current spray nozzle 56 can be on the position in slightly partially, the center of its excircle and inner periphery, and a plurality of holes 562 are set ringwise; Also can shown in Figure 20 A, on the center of excircle and inner periphery, a plurality of holes 564 be set ringwise; Perhaps shown in Figure 21 A,, but the groove 565 of ring-type is set without the hole 564 shown in Figure 20 A.In addition, can also shown in Figure 22 B, the 6th air current spray nozzle 56 be made spiral type, the front end of two-layer encirclement motlten metal nozzle 2 as Figure 22 A.
When utilizing metal sheet band manufacturing installation of the present invention to make strip, preferably before 1 rotation of cooling roller, supply with inert gas by first to the 6th air current spray nozzle 51～56.Compare with the situation of supplying with inert gas in cooling roller 1 rotation back, supply with the situation of air-flow before 1 rotation of cooling roller, the concentration of oxygen can very fast reduction.Therefore, the oxygen concentration near the atmosphere the mensuration motlten metal nozzle 2 after reaching the oxygen concentration of regulation, just makes 1 rotation of cooling roller, can enhance productivity.
In the present invention, desirable as the condition of being supplied with inert gas by first feeder: flow is 200～1800 liters/minute, preferably 1760 liters/minute.When flow less than 200 liters/timesharing, do not reach the effect that reduces near the amount of oxygen the motlten metal nozzle 2; And when surpassing 1800 liters/timesharing, can become atmosphere since the air-flow effect and from around be involved in, therefore, the effect of reduction oxygen concentration weakens, and does not reach the effect that matches with air demand.
In this case, be preferably 330～530 liters/minute from the flow of the main air of aforementioned first air current spray nozzle 51 ejection, be preferably 180～380 liters/minute from the flow of the secondary air flow of aforementioned second air current spray nozzle 52 ejection, be preferably 150～350 liters/minute from the flow of the 3rd strand of air-flow of aforementioned the 3rd air current spray nozzle 53 ejection, be preferably 400～600 liters/minute from the flow of the 4th strand of air-flow of aforementioned the 4th air current spray nozzle 54 ejection, be preferably 200～400 liters/minute from the flow of the 6th strand of air-flow of aforementioned the 6th air current spray nozzle 56 ejections.
It is 380～480 liters/minute that the parameter area of the hope of first to fourth and the 6th strand of air-flow is respectively main air-flow, is preferably 430 liters/minute; Secondary air flow-flow is 230～330 liters/minute, is preferably 280 liters/minute; The 3rd strand of air-flow-flow is 150～350 liters/minute, is preferably 250 liters/minute; The 4th strand of air-flow-flow is 400～600 liters/minute; The 6th strand of air-flow-flow is 200～400 liters/minute.
Particularly, if the flow of the 4th strand of air-flow more than 450 liters/minute, preferably 500 liters/minute, then can reduce weld pool more and form near the oxygen concentration of part.
In the present invention, desirable as the condition of being supplied with inert gas by the second air-flow feedway: flow is 250～750 liters/minute, is preferably 500 liters/minute.When flow less than 250 liters/timesharing, do not reach the effect of the amount of oxygen near the atmosphere that is reduced in the motlten metal nozzle; And, do not reach the effect that matches with air demand when surpassing 750 liters/timesharing.
As the 5th strand of air-flow, wish that its flow is 250～750 liters/minute from 55 ejections of the 5th air current spray nozzle.
The parameter area preferably of the 5th strand of air-flow is 400～600 liters/minute of flows, is preferably 500 liters/minute.
As used inert gas in the metal sheet band manufacture method of the present invention, can use from N 2, at least two kinds of inert gases selecting among He, Ar, Kr, Xe, the Rn, N the most 2And Ar.
In addition, in main air, wish to use than heavier inert gas in second to the 6th strand of air-flow.Best, in main air, use heavier-than-air inert gas.
Next illustrates atmosphere cut-off 60.
As Figure 17 A, Figure 17 B, Figure 18 and Figure 23 A are shown in Figure 23 B, atmosphere cut-off 60 of the present invention has following parts at least: the position with motlten metal nozzle 2 is a benchmark, the roller front atmosphere baffle board 64 that is provided with on direction of rotation the place ahead front position of cooling roller 1; Be positioned at direction of rotation the place ahead of cooling roller 1, clip cooling roller 1, a pair of roller the place ahead atmosphere baffle board 63,63 that contacts with roller front atmosphere baffle board 64; Be positioned at the top in direction of rotation the place ahead of cooling roller 1, with the roller top atmosphere baffle board 62 of the upper end-face edge contact of roller the place ahead atmosphere baffle board 63,63; With clip cooling roller 1, a pair of roller side atmosphere baffle board 67,67 that contacts with the peripheral atmosphere cut-off of roller the place ahead atmosphere baffle board 63,63 and roller.
As Figure 17 A, Figure 17 B and Figure 23 A, shown in Figure 23 B, the purpose that aforementioned roller the place ahead atmosphere baffle board 63 is set is will interdict atmosphere to be involved in from the place ahead, two sides of cooling off roller 1.
In addition, the purpose that roller front atmosphere baffle board 64 is set is that the blocking atmosphere is involved in from the place ahead relative with the cooling surface of cooling roller 1.In the present embodiment, roller front atmosphere baffle board 64 is arranged on front end and two places of approximate center of roller the place ahead atmosphere baffle board 63; Yet, as required, also can be arranged on a place or the place more than three (referring to Figure 17 A, Figure 17 B, Figure 23 A, Figure 23 B).In this case, can reduce oxygen concentration near the motlten metal nozzle 2 the atmosphere more.In addition, at the center of roller front atmosphere baffle board 64, be provided with a strip through port 641.When making strip, strip is by this strip through port 641.
Figure 17 A and for example, Figure 17 B and Figure 23 A, shown in Figure 23 B, roller top atmosphere baffle board 62, position with motlten metal nozzle 2 is a benchmark, from the place ahead of direction of rotation of cooling roller 1, rearward extends, and be mounted and be fixed on the upper end-face edge of this roller the place ahead atmosphere baffle board 63, be positioned at the top of cooling roller 1.The purpose of this roller top atmosphere baffle board 62 is set, and is will interdict atmosphere to be involved in from the top of cooling off roller 1.
This roller top atmosphere baffle board 62, along with advancing, approaching with the top of the cooling surface 1a that cools off roller 1 gradually to the rear of the direction of rotation of cooling off roller 1.
And for example shown in Figure 4, on atmosphere baffle board 62 above this roller, done nozzle installing hole 621.Motlten metal nozzle 2 connects this nozzle installing hole 621, and the front end 21 of its motlten metal ejection part is relative with the cooling surface 1a of cooling roller 1.
As shown in figure 18, crucible 3 is placed among the cylinder 3a.This cylinder 3a covers this nozzle installing hole 621, prevents that atmosphere from flowing into.
And for example Figure 18 and shown in Figure 4 on atmosphere baffle board 62 above this roller, does the hole 622 that connects usefulness for the 3rd air current spray nozzle 53.The 3rd air current spray nozzle 53 connects this hole 622, and its front end is relative with the cooling surface of cooling roller 1.Utilize the 3rd air current spray nozzle 53, inert gas from roller direction of rotation the place ahead, can be injected into weld pool and form near the part.
Because the roller top atmosphere baffle board 62 cooling surface 1a near cooling roller 1, therefore, the space became narrow and small near weld pool formed part.Because the first to the 3rd and the 6th air current spray nozzle 51,52,53,56 is supplied with a large amount of inert gases to this narrow space always, so near the inert gas concentration the weld pool formation part is very high, on the contrary, oxygen concentration significantly reduces.
In addition, motlten metal nozzle 2 has only the front end 21 of its motlten metal ejection part to connect this roller top atmosphere baffle board 62.The body part of motlten metal nozzle 2 is above roller above the atmosphere baffle board 62, promptly in the outside of atmosphere cut-off 60.Therefore, the body of motlten metal nozzle 2, crucible 3 and be wound on the outside that heater coil 4 above them all is positioned at atmosphere cut-off 60.
Therefore, motlten metal nozzle 2 with respect to atmosphere cut-off 60, is installed easily and is unloaded.
As Figure 17 A, Figure 17 B and Figure 23 A, shown in Figure 23 B, roller top atmosphere baffle board 62 is the direction of rotation the place aheads from cooling roller 1, towards the smooth extension of aforementioned cooling surface.But be not limited only to this, as Figure 24 A, shown in Figure 24 B, roller top atmosphere baffle board 65 can also extend towards cooling surface 1a from direction of rotation the place ahead of cooling roller 1, and the while is towards the interior curve of atmosphere cut-off 60.Utilize this roller top atmosphere baffle board 65, can interdict the atmosphere that flows into from opening portion 641, the reduction weld pool forms near the oxygen concentration the part.
And for example shown in Figure 25 A, on atmosphere baffle board 62 above the roller, at least more than one can also be set, the demarcation strip 66 that highlights towards these atmosphere cut-off 60 inside.By forming demarcation strip 66, can interdict the atmosphere that flows into from opening portion 641, reduce weld pool more and form near the oxygen concentration of part.In addition, as Figure 25 A, shown in Figure 25 B, this demarcation strip 66 not only direction of rotation towards cooling roller 1 is outstanding, and outstanding towards vertical lower, like this, and the effect of the oxygen concentration that can be reduced.
As Figure 17 A, Figure 17 B, Figure 23 A, Figure 23 B and Fig. 8 A, shown in Fig. 8 B, roller side atmosphere baffle board 67 for diameter than the big circular plate shape of cooling roller 1, with two contacts side surfaces of cooling roller 1.In addition, this roller side atmosphere baffle board 67 is from roller the place ahead atmosphere baffle board 63, extends to the rear of cooling roller 1.
The purpose of this roller side atmosphere baffle board 67 is set, and is that the blocking atmosphere is involved in from the side of cooling off roller 1.
In addition, roller side atmosphere baffle board 67 can be made of one with roller the place ahead atmosphere baffle board 63.
Aforementioned cooling roller 1 is configured in the space of being divided by peripheral atmosphere baffle board 68 of roller and a pair of roller side atmosphere baffle board 67.The peripheral atmosphere baffle board 68 of roller can improve the atmosphere blocking effect that is produced by roller surface atmosphere baffle board 61 more.
And for example Fig. 8 A shown in Fig. 8 B, can be provided with roller rear atmosphere baffle board 69 as atmosphere cut-off 60.Roller rear atmosphere baffle board 69 is the width big disk construction of width than cooling roller 1, and it is provided with purpose is will interdict atmosphere to be involved in from the rear lower portion of cooling off roller 1.
More than each atmosphere baffle board 61～65,67～69 can use separately, also can be a plurality of use together.When whole atmosphere baffle boards 61～65 are set, 67～69 o'clock, roughly cooling roller 1 can be surrounded, like this, by the air-flow of aforementioned first to the 6th air current spray nozzle 51～56 ejections, can improve to greatest extent and reduce the effect that weld pool forms near the oxygen concentration of part.
In addition, Figure 17 A, Figure 17 B and Figure 23 A, Figure 23 B to Figure 25 A, in the metal sheet band manufacturing installation shown in Figure 25 B, roller front atmosphere baffle board 64 is arranged on two places, and the space between them becomes atmosphere and is detained part 80.
In Figure 17 A and Figure 23 A to Figure 25 A, atmosphere is detained part 80 and is located at the outside of atmosphere cut-off 60, but also can be located at the inside of atmosphere cut-off 60.In addition, if the opening portion area of the open area ratio atmosphere cut-off 60 of atmosphere delay part 80 is big, then can improve the atmosphere retention effect.In addition, atmosphere is detained part 80 usefulness polylith demarcation strips and separates, and also can improve the atmosphere retention effect.
Metal sheet band manufacturing installation shown in Figure 17 A and Figure 23 A to Figure 25 A is used in the crucible 3 of low capacity, therefore, making continuously under the situation of a large amount of metal sheet bands, in the metal sheet band manufacturing installation that constitutes by building block shown in Figure 9, also can adopt air-flow of the present invention, atmosphere cut-off and atmosphere to be detained part.That is, in metal sheet band manufacturing installation shown in Figure 9, motlten metal 19 remains in the calciner 20, from the outlet at bottom of this calciner 20, through flowing out pipeline 21, flows in the pans 22.In the bottom of these pans 22, be provided with motlten metal nozzle 2, motlten metal is injected into from this nozzle 2 on the surface of the cooling roller 1 that rotates at a high speed, forms strip through supersolidification.Owing to utilize this device, when the motlten metal in pans 22 reduces, can replenish motlten metal from calciner 20 to these pans 22 gradually, therefore, be applicable to continuous production.
In addition, the fourth embodiment of the present invention is to use the metal sheet band manufacturing installation shown in aforementioned first to the 3rd embodiment, and motlten metal nozzle 2 and have between the cooling roller 1 of cooling surface 1a and keep certain interval is facing to aforementioned cooling surface 1a; From this nozzle 2 molten alloy is injected on the aforementioned cooling roller 1 of rotation, sharply cools off and form the metal sheet band manufacturing installation of metal sheet band.Utilize the atmosphere cut-off cover aforementioned cooling roller 1 excircle at least a portion and be the fore-end of the ejection part of aforementioned motlten metal nozzle 2 at least, thereby can prevent that atmosphere is involved in because of the rotation of aforementioned cooling roller 1.Aforementioned molten alloy is injected on the aforementioned cooling roller 1, and forms metal sheet band.
In aforementioned manufacture method, preferably around at least one side of aforementioned motlten metal nozzle 2 or cooling roller 1,, spray molten alloy simultaneously by supplying with inert gas, sharply cool off and form metal sheet band.
In addition, aforementioned inert gas can be supplied with by the aforementioned first and/or second air-flow feedway, supplies with at least two kinds of inert gases and forms metal sheet band.
Aforementioned two kinds of inert gases are with N 2Best with Ar.Utilize aforesaid manufacture method to make metal sheet band, do not need to be provided with huge and attendant equipment that operability is bad can easily be made the metal sheet band of easy oxidation.
Effective material that the present invention uses has following several.
Fe bB xM y
In the formula: M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %.
(Fe 1-aZ a) bB xM y
In the formula: Z is Ni, one or both among the Co; M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); A＜0.2; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %.
Fe bB xM yX z
In the formula: M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); X is from Cu, Ag, Cr, Ru, Rh, the element of one or more that select among the Ir; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %; Z＜5 atom %.
(Fe 1-aZ a) bB xM yX z
In the formula: Z is Ni, one or both among the Co; M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); X is from Cu, Ag, Cr, Ru, Rh, the element of one or more that select among the Ir; A＜0.2; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %; Z＜5 atom %.
Fe bB xM yX′ t
In the formula: M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); X ' is from Si, Al, Ge, the element of one or more that select among the Ga; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %; T＜4 atom %.
(Fe 1-aZ a) bB xM yX’ t
In the formula: Z is Ni, one or both among the Co; M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); X ' is from Si, Al, Ge, the element of one or more that select among the Ga; A＜0.2; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %; T＜4 atom %.
Fe bB xM yX zX’ t
In the formula: M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); X is from Cu, Ag, Cr, Ru, Rh, the element of one or more that select among the Ir; X ' is from Si, Al, Ge, the element of one or more that select among the Ga; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %; Z＜5 atom %; T＜4 atom %.
(Fe 1-aZ a) bB xM yX zX’ t
In the formula: Z is Ni, one or both among the Co; M is from Ti, Zr, Hf, V, Nb, Ta, Mo, the element of one or more that select among the W (must contain Zr, Hf, any among the Nb); X is from Cu, Ag, Cr, Ru, Rh, the element of one or more that select among the Ir; X ' is from Si, Al, Ge, the element of one or more that select among the Ga; A＜0.2; B=75 atom %～93 atom %; X=0.5 atom %～18 atom %; Y=4 atom %～9 atom %; Z＜5 atom %; T＜4 atom %.
According to the present invention, after obtaining having the non-crystal alloy thin band of above composition, be heated to its crystallization temperature above (for example, 500 ℃～600 ℃), the heat treatment of cooling off at a slow speed can obtain having the non-retentive alloy strip of the fine crystal tissue that the crystallization by 100～200 dusts constitutes.
In the metal sheet band manufacturing installation of aforementioned first embodiment, because the front end 21 of the motlten metal of motlten metal nozzle 2 ejection part is covered by atmosphere cut-off 60, the body of motlten metal nozzle 2 and crucible 3 are configured in the outside of atmosphere cut-off 60, therefore, under the situation of the atmosphere of keeping atmosphere cut-off 60 inside, can be easily to pack into the raw material of fusion of crucible 3.
In addition, in aforementioned metal strip manufacturing installation,, therefore,, can interdict the place ahead and the rear of atmosphere, be involved near the weld pool from direction of rotation along with the rotation of cooling roller 1 because atmosphere cut-off 60 is located at the place ahead and the rear of the direction of rotation of cooling roller 1.
Moreover because atmosphere is detained direction of rotation the place ahead that part 80 is located at the cooling roller, therefore, the effect that relies on atmosphere to be detained can prevent that atmosphere is involved in the peripheral atmosphere cut-off of this roller 60 inside.
In aforementioned metal strip manufacturing installation, be provided with above the place ahead that is positioned at cooling roller 1 direction of rotation, the roller top atmosphere baffle board 62 that contacts with the upper end-face edge of roller the place ahead atmosphere baffle board 63, because this baffle board 62 is from direction of rotation the place ahead of cooling roller 1, rearward extend, and along with Backwards to the direction of rotation of cooling off roller 1, approaching with the cooling surface of cooling roller gradually, make near the space stenosis the weld pool of the peripheral atmosphere cut-off of roller 60 inside little, like this, because the influence that not distributed by near the composition of the atmosphere of weld pool is so can make the metal sheet band of characteristic homogeneous.
Again because the ejection part front end 21 of motlten metal nozzle 2 connects nozzle installing hole 621, relative with cooling roller 1, the body of molten metal nozzle 2, crucible 3 and heater coil 4 are positioned at the outside of atmosphere cut-off 60, therefore, motlten metal nozzle 2 is installed easily and is unloaded with respect to atmosphere cut-off 60.Simultaneously, owing to can freely change the position of motlten metal nozzle 2, therefore,, can make the uniform strip of thickness of slab again by adjusting the interval between cooling roller 1 and the motlten metal nozzle 2 for atmosphere cut-off 60.
In aforementioned metal strip manufacturing installation,, and, therefore can interdict atmosphere and be involved near the weld pool to atmosphere cut-off 60 interior curve because atmosphere baffle board 62 extends towards the direction of rotation rear of cooling roller 1 above the roller.
In aforementioned metal strip manufacturing installation,, therefore, can interdict atmosphere and be involved near the weld pool owing on atmosphere baffle board 62 above the roller, be provided with to atmosphere cut-off 60 inner outstanding demarcation strips 66.
In aforementioned metal strip manufacturing installation, because the direction of rotation front lower place at cooling roller 1 is provided with strip guided plate 70 and scraper plate 72, on roller front atmosphere baffle board 64, be provided with the through port 641 that metal sheet band passes through, therefore, scraper plate 72 can be from stripping metal strip on the cooling roller 1, this strip by through port 641, exports metal sheet band manufacturing installation outside by strip guided plate 70 guiding to sleekly.
In aforementioned metal strip manufacturing installation, owing to be provided with the air-flow feedway of around motlten metal nozzle 2, supplying with inert gas, a large amount of inert gases can be supplied to by near the space weld pool of cooling roller 1 and atmosphere baffle board 62 divisions of roller top, therefore can make near the inert gas concentration of weld pool very high, and oxygen concentration significantly reduce.
In the metal sheet band manufacturing installation of second embodiment, since the 5th air current spray nozzle 55 be configured in the cooling roller 1 under, it is the direction of rotation rear of the cooling roller 1 of benchmark that roller surface atmosphere baffle board 61 is located at motlten metal nozzle 2, around motlten metal nozzle 2, disposed first to fourth air current spray nozzle 51～54, therefore, inert gas from the ejection of the 5th air current spray nozzle, direction of rotation along cooling roller 1, on cooling surface 1a, flow, inert gas can be by the minim gap between roller surface atmosphere baffle board 61 and the cooling surface 1a, near the inflow motlten metal nozzle 2, reduces near the oxygen concentration of weld pool.
In addition, in aforementioned metal strip manufacturing installation, surround cooling roller 1 owing to be provided with, cover cooling surface 1a, as the peripheral atmosphere baffle board 68 of the roller of the peripheral atmosphere cut-off of roller, and the 5th air current spray nozzle 55 is relative with cooling surface 1a from the optional position of the peripheral atmosphere baffle board 68 of this roller, therefore, ejection from the 5th air current spray nozzle 55, flow to the inert gas of roller surface atmosphere baffle board 61 along cooling surface 1a,, can not spread between the roller surface atmosphere baffle board 61, more inert gas is arranged by this roller surface atmosphere baffle board 61, near the inflow weld pool, so, near the oxygen concentration of weld pool can be reduced more.
Owing to, be provided with atmosphere and be detained part 80,, can prevent that atmosphere is involved in atmosphere cut-off 60 inside again so rely on atmosphere to satisfy the effect of staying in direction of rotation the place ahead of cooling roller.
In aforementioned metal strip manufacturing installation, because the roller top atmosphere baffle board 62 that be provided with above the direction of rotation the place ahead that is positioned at cooling roller 1, contacts with the upper end-face edge of roller the place ahead atmosphere baffle board 63, this baffle board 62 rearward extends from direction of rotation the place ahead of cooling roller 1, along with the direction of rotation rear that advances to cooling roller 1, move closer to the cooling surface 1a of cooling roller 1, therefore, near the space the weld pool of atmosphere cut-off 60 inside becomes narrow and small; Again owing to the composition distribution influence that is not subjected near the atmosphere of weld pool, so can make the metal sheet band of characteristic homogeneous.
In the metal sheet band manufacturing installation of aforementioned the 3rd embodiment, owing to have atmosphere cut-off 60, roller surface atmosphere cut-off 61, the peripheral atmosphere cut-off 68 of roller, the first air-flow feedway and the second air-flow feedway, so, flow near the motlten metal nozzle 2 from least two kinds of inert gases of first air-flow feedway ejection; Heavier inert gas in aforementioned two kinds of inert gases under the lighter inert gas in atmosphere cut-off 60, forms heavy layer of inert, forms near the inert gas concentration of part thereby can improve weld pool.In addition, from the inert gas of second air-flow feedway ejection, along the direction of rotation of cooling roller 1, on the cooling surface 1a of cooling roller 1, flow,, enter weld pool and form near the part by roller surface atmosphere cut-off 61, therefore, can reduce weld pool and form near the oxygen concentration of part.
Again, the first air-flow feedway is owing to have: be positioned at and leave motlten metal nozzle 2 and cool off the relative position of roller 1, be positioned at first air current spray nozzle 51 and second air current spray nozzle 52 at the direction of rotation rear of aforementioned cooling roller 1; Be positioned at the 3rd air current spray nozzle 53 and the 4th air current spray nozzle 54 in direction of rotation the place ahead of aforementioned cooling roller 1; With aforementioned motlten metal nozzle 2 front ends of encirclement, be used to supply with the 6th gas nozzle 56 of the hollow ring of inert gas, 566,567,568, therefore, inert gas can reduce weld pool and form near the oxygen concentration of part more from the direction of rotation the place ahead and rear of cooling off roller 1 and the position ejection that surrounds motlten metal nozzle 2 front ends.
In addition, on the preceding extreme direction that first air current spray nozzle 51 is arranged on from the sub-tangential direction of cold breakdown towards motlten metal nozzle 2, can spray the inert gas of the indifferent gas body weight of supplying with than other air current spray nozzle; Aforementioned second air current spray nozzle 52 is arranged between the motlten metal nozzle 2 and first air current spray nozzle 51, air-flow is sprayed on the air-flow of aforementioned first air current spray nozzle 51 ejections; Therefore, inert gas from the weight of first air current spray nozzle 51 ejection, secondary air flow by the ejection of second air current spray nozzle, form near the cooling roller of part and drop on weld pool, weld pool forms near the inert gas concentration of part and raises, and therefore can more reduce weld pool and form near the oxygen concentration of part.
Again because the 6th air current spray nozzle 56 is annulars of hollow, it surrounds the front end of motlten metal nozzle 2, done many holes in the position of being partial to the inboard a little from the excircle and the inner periphery center of aforementioned the 6th air current spray nozzle 56, the gas of ejection surrounds the front end of this motlten metal nozzle 2; Therefore, from the 6th strand of air-flow of the 6th air current spray nozzle 56 ejections, can reduce weld pool more and form near the oxygen concentration of part.
(test example 1)
Utilize the metal sheet band manufacturing installation of first embodiment of above explanation, the air-flow time of inert gas and the investigation result that oxygen concentration changes are described.In following test example, the diameter of employing is 300 millimeters cooling rollers 1, and motlten metal nozzle 2 is positioned at the position in 4 millimeters in the place ahead, top of cooling roller 1.In addition, inert gas is Ar.
Measure when air current spray nozzle and atmosphere baffle board under the following conditions, atmosphere is detained part at Figure 1A, the oxygen concentration of (device No.1) under Figure 1B and the form shown in Figure 2.Inert gas adopts Ar, behind the gas injection beginning, through 15 minutes, makes cooling roller 1 with 100 rev/mins of rotations, again through after 2 minutes, the rotary speed of cooling roller is increased to 2000 rev/mins, rotates 3 minutes.Oxygen concentration determination is with the LC-700H instrument of Dongli Ltd.'s system, carrying out on the position on 0.3 millimeter on the surface of the cooling roller 1 in motlten metal nozzle 2 the place aheads.Stop to spray motlten metal, measure the concentration of oxygen.Then, as a comparison, (device No.2) measures oxygen concentration equally under the situation that atmosphere delay part is not set.
In addition, the band flow of Youda of use Co., Ltd. good ((strain) ユ カ) system is measured gas flow with the flowmeter F-7 of instrument board.
The air current spray nozzle condition:
First air current spray nozzle (245 liters/minute of flows, flow velocity 19 meter per seconds)
Second air current spray nozzle (250 liters/minute of flows, flow velocity 4.8 meter per seconds)
The 3rd air current spray nozzle (200 liters/minute of flows, flow velocity 38 meter per seconds)
The 4th air current spray nozzle (500 liters/minute of flows, flow velocity 50 meter per seconds)
Atmosphere baffle board condition:
Roller surface atmosphere baffle board, roller the place ahead atmosphere baffle board, roller top atmosphere baffle board, roller front atmosphere baffle board.
Cooling roller when beginning rotation, rotate after 2 minutes and the oxygen concentration that rotates after 5 minutes as follows.Near when rotating at a high speed by atmosphere delay part being set, can suppressing to cool off roller the weld pool oxygen concentration raises, and improves its effect.
After 2 minutes number whens beginning rotation of device after 5 minutes
1 0.217％ 0.212％ 0.66％
2 0.005％ 0.008％ 3.41％
(test example 2)
Use the metal sheet band manufacturing installation of second embodiment of above explanation, the air-flow time of inert gas and the investigation result that oxygen concentration changes are described.In following test example, the diameter of employing is 300 millimeters cooling rollers 1, and motlten metal nozzle 2 is located on the position in 4 millimeters in the place ahead, top of cooling roller 1.In addition, inert gas N 2
At air current spray nozzle and atmosphere baffle board place under the following conditions, it be under the form shown in Figure 13 that atmosphere is detained part, the mensuration oxygen concentration.Inert gas N 2After air-flow begins,, make cooling roller 1, after 2 minutes, make the rotating speed of cooling roller be increased to 2000 rev/mins, rotated 3 minutes with 100 rev/mins of rotations through 5 minutes.The cooling roller after 1 minute, makes the cooling surface 1as of motlten metal nozzle 2 near cooling rollers 1 in rotation under 2000 rev/mins.Oxygen Xiao Du measures the LC-700H instrument with Dongli Ltd.'s system, carries out on 0.3 millimeter the position on the surface of the cooling roller 1 that leaves motlten metal nozzle 2 the place aheads.Stop to spray motlten metal, measure oxygen concentration.As a comparison, not under the situation of supply gas, measure oxygen concentration at the 5th air current spray nozzle equally.
In addition, utilize the flowmeter F-7 mensuration gas flow of the band flow of the good system of Youda of Co., Ltd. with instrument board.
The air current spray nozzle condition:
First air current spray nozzle (245 liters/minute of flows, flow velocity 19 meter per seconds)
Second air current spray nozzle (250 liters/minute of flows, flow velocity 4.8 meter per seconds)
The 3rd air current spray nozzle (200 liters/minute of flows, flow velocity 38 meter per seconds)
The 4th air current spray nozzle (500 liters/minute of flows, flow velocity 50 meter per seconds)
The 5th air current spray nozzle (250～750 liters/minute of flows, flow velocity 5～60 meter per seconds)
Atmosphere baffle board condition:
Roller surface atmosphere baffle board, roller the place ahead atmosphere baffle board, roller top baffle board, roller front atmosphere baffle board, roller side atmosphere baffle board, the peripheral atmosphere baffle board of roller.
As shown in figure 26, when the cooling roller when the slow-speed of revolution (100 rev/mins), in either case, oxygen concentration is 5～10%, but when supplying with inert gas after 10 minutes, promptly cools off roller and rotate (2000 rev/mins) at a high speed after 3 minutes, under the situation of the 5th air current spray nozzle ejection inert gas, oxygen concentration is about 0.6%, and particularly working as gas flow is 750 liters/timesharing, and oxygen concentration is 0.56%.
When the 5th air current spray nozzle was not supplied with inert gas fully, after 10 minutes, oxygen concentration was 1.83%.
Therefore, except that first to second air current spray nozzle, by from the 5th air current spray nozzle ejection inert gas, under cooling roller rotation situation at a high speed, near the oxygen concentration reduction the weld pool.
(test example 3)
In the metal sheet band manufacturing installation of aforementioned the 3rd embodiment, have any one in the 6th air current spray nozzle 56,566,567 shown in Figure 19 A to Figure 21 A, study the relation of the 6th strand of air flow rate and oxygen concentration.
In test example 3, the diameter of cooling roller 1 is 300 millimeters, and the position of motlten metal nozzle 2 is at 4 millimeters places, the place ahead, top of cooling roller 1.
Under following condition as first to the 6th strand of air-flow of from first to the 6th air current spray nozzle 51～56 ejection and atmosphere baffle board, be Figure 17 A when atmosphere is detained part, during form shown in Figure 17 B, the concentration of mensuration oxygen.
Inert gas adopts Ar and N 2When ejection Ar gas, the usage ratio factor makes the flow unanimity.
Oxygen concentration determination utilizes the LC-700H instrument of Dongli Ltd.'s system, carries out at the 0.3 millimeter place, surface from the cooling roller 1 in the place ahead of motlten metal nozzle 2.Stop and from motlten metal nozzle 2, not spraying under the state of motlten metal at cooling roller 1, measure oxygen concentration.
Inert gas flow uses the flowmeter F-7 of instrument board to measure with the band flow of the good system of Youda of Co., Ltd..
Flow conditions:
Main air (432 liters/minute of flows, inert gas are Ar)
(280 liters/minute of flows, inert gas are N to secondary air flow 2)
(250 liters/minute of flows, inert gas are N to the 3rd strand of air-flow 2)
(500 liters/minute of flows, inert gas are N to the 4th strand of air-flow 2)
(500 liters/minute of flows, inert gas are N to the 5th strand of air-flow 2)
(100～600 liters/minute of flows, inert gas are N to the 6th strand of air-flow 2)
Atmosphere baffle board condition:
Roller surface atmosphere baffle board, roller the place ahead atmosphere baffle board, roller top baffle board, roller front atmosphere baffle board, roller side atmosphere baffle board, the peripheral atmosphere baffle board of roller.
The result is illustrated among Figure 27.
In Figure 27, the 6th air current spray nozzle 56 shown in the symbol 56A presentation graphs 19A, the 6th air current spray nozzle 566 shown in the symbol 56B presentation graphs 20A, the 6th air current spray nozzle 567 shown in the symbol 56C presentation graphs 21A.
As can be seen from Figure 27, on the position in a little partially of the excircle shown in Figure 19 A and inner periphery center, do when portalling 562 the 6th air current spray nozzle 56 when using, lower than the oxygen concentration of doing in the excircle shown in Figure 20 A and inner periphery center when portalling 564 the 6th air current spray nozzle 566.In addition, also find out, the 6th air current spray nozzle 567 shown in Figure 21 A, when flow at 500 liters/minute when above, lower than the oxygen concentration of the 6th air current spray nozzle 56 shown in Figure 19 A.
(test example 4)
With the same metal sheet band manufacturing installation of test example 3 in, do not having the 6th air current spray nozzle and having under the situation of the 6th air current spray nozzle 56 shown in Figure 19 A, the flow that the 6th strand of air-flow worked as in research is 100 liters/minute, 200 liters/minute, 300 liters/minute, 400 liters/minute, 500 liters/minute, 600 liters/timesharing, the time of logical inert gas and the relation of oxygen concentration.
First to the 6th strand of air-flow is identical with test example 1 with atmosphere baffle board condition, after air-flow begins 5 minutes, make cooling roller 1 with 100 rev/mins of rotations, again through after 2 minutes, the rotating speed of cooling roller is increased to 2000 rev/mins, rotated 3 minutes, make the cooling roller again after rotating 1 minute under 2000 rev/mins, make the cooling surface 1a of motlten metal nozzle 2 near cooling roller 1, the same with test example 1, measure oxygen concentration.
The result is illustrated among Figure 28.
As can be seen from Figure 28, because the 6th air current spray nozzle 56 is supplied with the 6th strand of air-flow, oxygen concentration can reduce.
In addition, can find out also that the 6th air current spray nozzle 56 shown in Figure 19 A when cooling off roller 1 when low speed (100 rev/mins) rotates, is that 200 liters/timesharing can obtain minimum oxygen concentration at flow.But, supplying with inert gas after 10 minutes, be 300 liters/timesharing at flow, oxygen concentration is also minimum.
When supplying with inert gas after 10 minutes, promptly cool off roller 1 with (2000 rev/mins) rotation at a high speed after 3 minutes, when flow is 200 liters/timesharing, oxygen concentration is 0.037%; When flow is 300 liters/timesharing, oxygen concentration is 0.035%.
(test example 5).
In the metal sheet band manufacturing installation identical with test example 4, has the 6th air current spray nozzle 566 shown in Figure 20 A and the 6th strand of air flow rate is 100 liters/minute, 200 liters/minute, 300 liters/minute, 400 liters/minute, 500 liters/minute, under 600 liters/minute the situation, the same with test example 2, the time of the logical inert gas of research and the relation of oxygen concentration.
The result is illustrated among Figure 29.
As can be seen from Figure 29, the 6th air current spray nozzle 566 shown in Figure 20 A is 300 liters/timesharing at flow, can obtain minimum oxygen concentration.
Be under 300 liters/minute the situation, to supply with inert gas at flow, after 10 minutes, oxygen concentration is 0.21%.
(test example 6)
With the same metal sheet band manufacturing installation of test example 4 in, at the flow with the 6th air current spray nozzle 567 shown in Figure 21 A and the 6th strand of air-flow is 100 liters/minute, 200 liters/minute, 300 liters/minute, 400 liters/minute, 500 liters/minute, under 600 liters/minute the situation, the same with test example 2, the relation of logical inert gas time of research and oxygen concentration.
The result is illustrated among Figure 30.
As can be seen from Figure 30, the 6th air current spray nozzle 567 shown in Figure 21 A when cooling roller 1 low speed (100 rev/mins) rotation, is under 300 liters of/minute situations at flow, can obtain minimum oxygen concentration; But supplying with inert gas after 10 minutes, is 600 liters/timesharing at flow, also can obtain minimum oxygen concentration.
Supplying with inert gas after 10 minutes, when flow is 300 liters/timesharing, oxygen concentration is 0.219%; When flow is 600 liters/timesharing, oxygen concentration is 0.0219%.
From the test example 4～6 the result as can be known, the 6th air current spray nozzle 56 shown in Figure 19 A can reduce the concentration of oxygen than the 6th air current spray nozzle 566 shown in Figure 20 A; Compare with the 6th air current spray nozzle 567 shown in Figure 21 A, under the situation of a small amount of air feed, oxygen concentration can reach below 0.1%, can obtain good effect.
From finding out here, when considering to reduce the effect of air demand and oxygen concentration, use the 6th air current spray nozzle 56 shown in Figure 19 A, be 300 liters/timesharing at flow, just obviously draw best result.
(test example 7)
With the same metal sheet band manufacturing installation of test example 4 in, have Figure 22 A, the 6th air current spray nozzle shown in Figure 22 B, in the flow conditions of test example 3, the 6th strand of air-flow satisfies under the situation of following condition, and be the same with test example 4, the relation of logical inert gas time of research and oxygen concentration.
Flow conditions:
(flow is 600 liters/minute to the 6th strand of air-flow, and inert gas is N 2)
(test example 8)
With the same metal sheet band manufacturing installation of test example 4 in, have the 6th air current spray nozzle 568 shown in Figure 22 A, in the flow conditions of test example 6, first, second strand air-flow satisfies under the situation of following condition, the same with test example 2, the relation of logical inert gas time of research and oxygen concentration.
Flow conditions:
(300 liters/minute of flows, inert gas are N to main air 2)
(280 liters/minute of flows, inert gas are N to secondary air flow 2)
(test example 9)
With the same metal sheet band manufacturing installation of test example 4 in, has the 6th air current spray nozzle 568 shown in Figure 22 A, in the flow conditions of test example 7, as from first, second air current spray nozzle 51, first, second strand air-flow of the air-flow of 52 ejections satisfies under the situation of following condition, the same with test example 4, the relation of logical inert gas time of research and oxygen concentration.
Flow conditions:
Main air (432 liters/minute of flows, inert gas are Ar)
Secondary air flow (280 liters/minute of flows, inert gas are Ar)
In test example 7～9, test example 7 is embodiments of the invention, and test example 8 and 9 is a comparative example.
The result of test example 7～9 is illustrated among Figure 31.
In Figure 31, symbol D represents to test the result of example 7, and E represents to test the result of example 8, and F represents to test the result of example 9.
As can be seen from Figure 31, Ar in getting inert gas and N 2In the test example 7 of two kinds of gases, compare with a test example 8 and a test example 9 with a kind of gas, the concentration of oxygen is low.
(test example 10)
With the same metal sheet band manufacturing installation of test example 4 in, has the 6th air current spray nozzle 56 shown in Figure 19 A, with in the flow conditions of test example 1, meet under the following condition at the 6th strand of air-flow, only select under the situation of one air-flow from first to the 6th strand of air-flow, the same with test example 4, the relation of logical inert gas time of research and oxygen concentration.
Flow conditions:
The 6th strand of air-flow (flow is 300 liters/minute, and inert gas is Ar)
The result is illustrated among Figure 32.
As can be seen from Figure 32, in order to reduce oxygen concentration, in first to the 6th strand of air-flow, the 6th burst of air-flow particular importance.

Claims (35)

1. a metal sheet band manufacturing installation is characterized by, and it is made up of following parts: the cooling roller that has the cooling surface of cooling molten metal; And keep certain clearance between the aforementioned cooling roller, the motlten metal nozzle relative with aforementioned cooling surface; Cover at least a portion of aforementioned cooling roller excircle and be the ejection part front end of aforementioned motlten metal nozzle at least, prevent that the rotation owing to aforementioned cooling roller is involved in the atmosphere cut-off of atmosphere.
2. metal sheet band manufacturing installation as claimed in claim 1 is characterized by, and aforementioned atmosphere cut-off is arranged on the direction of rotation the place ahead and the rear of aforementioned cooling roller at least, and atmosphere is detained the place ahead that part is located at aforementioned cooling roller direction of rotation.
3. metal sheet band manufacturing installation as claimed in claim 1 is characterized by, and aforementioned atmosphere cut-off has at least: the roller front atmosphere shield that is located at front, aforementioned cooling roller direction of rotation the place ahead; Be located at both sides, aforementioned cooling roller direction of rotation the place ahead, clamp aforementioned cooling roller, a pair of roller the place ahead atmosphere shield that contacts with aforementioned roller front atmosphere shield; Rearward extend from the place ahead of the direction of rotation of aforementioned cooling roller, contact, be positioned at the roller top atmosphere baffle board of aforementioned cooling roller top with aforementioned roller the place ahead atmosphere shield upper end-face edge; With the direction of rotation rear that is located at aforementioned cooling roller, the roller surface atmosphere baffle board that contacts with the cooling surface of aforementioned cooling roller; It is characterized by, aforementioned roller top atmosphere baffle board, along with advancing in the direction of rotation rear to aforementioned cooling roller, approaching with the cooling surface of aforementioned cooling roller; The ejection part front end of aforementioned motlten metal nozzle connects the nozzle installing hole on the atmosphere baffle board of aforementioned roller top, and is relative with the cooling surface of aforementioned cooling roller.
4. metal sheet band manufacturing installation as claimed in claim 3 is characterized by, and is provided with at least more than one to the inner outstanding demarcation strip of the peripheral atmosphere cut-off of aforementioned roller on atmosphere baffle board above the aforementioned roller.
5. metal sheet band manufacturing installation as claimed in claim 3 is characterized by, and on the atmosphere baffle board of aforementioned roller front, does the through port that the metal sheet band that forms through the cooling of aforementioned cooling roller passes through.
6. metal sheet band manufacturing installation as claimed in claim 3 is characterized by, and aforementioned roller top atmosphere baffle board is from the place ahead of cooling roller direction of rotation, towards the smooth extension of cooling surface of aforementioned cooling roller.
7. metal sheet band manufacturing installation as claimed in claim 6 is characterized by, and on atmosphere baffle board above the aforementioned roller, makees at least more than one the demarcation strip of giving prominence to towards the peripheral atmosphere cut-off of aforementioned roller inside.
8. metal sheet band manufacturing installation as claimed in claim 6 is characterized by, and on the atmosphere shield of aforementioned roller front, does the through port that the metal sheet band that forms through the cooling of aforementioned cooling roller passes through.
9. metal sheet band manufacturing installation as claimed in claim 3 is characterized by, aforementioned roller top atmosphere baffle board, and from cooling roller direction of rotation the place ahead, to the cooling surface extension of aforementioned cooling roller, and to the peripheral atmosphere cut-off of aforementioned roller interior curve.
10. metal sheet band manufacturing installation as claimed in claim 9 is characterized by, and does at least more than one to the inner outstanding demarcation strip of the peripheral atmosphere cut-off of aforementioned roller on atmosphere baffle board above the aforementioned roller.
11. metal sheet band manufacturing installation as claimed in claim 9 is characterized by, and on the atmosphere shield of aforementioned roller front, does the through port that the metal sheet band that forms through the cooling of aforementioned cooling roller passes through.
12. metal sheet band manufacturing installation as claimed in claim 3 is characterized by, and on atmosphere baffle board above the aforementioned roller, does at least more than one to the inner outstanding demarcation strip of the peripheral atmosphere cut-off of aforementioned roller; On the atmosphere shield of aforementioned roller front, do the through port that the metal sheet band that forms through the cooling of aforementioned cooling roller passes through.
13. metal sheet band manufacturing installation as claimed in claim 1 is characterized by, it has the air-flow feedway of supplying with inert gas around aforementioned motlten metal nozzle.
14. metal sheet band manufacturing installation as claimed in claim 13 is characterized by, the gas flow rate that sprays from aforementioned air-flow feedway is 2～80 meter per seconds, and gas flow is 200～1400 liters/minute.
15. a metal sheet band manufacturing installation on the cooling surface of its cooling roller by motlten metal being injected in rotation, with this motlten metal cooling, and forms metal sheet band by aforementioned cooling surface, this device has: aforementioned cooling roller; With aforementioned cooling roller from a distance, motlten metal is injected into the motlten metal nozzle of aforementioned cooling surface; At least from the ejection part front end of aforementioned motlten metal nozzle, to the position that aforementioned metal strip and aforementioned cooling surface are peeled off, along the direction of rotation of aforementioned cooling roller, be covered with aforementioned cooling surface, prevent because the atmosphere cut-off that the rotation of aforementioned cooling roller is involved in atmosphere; Be positioned at and leave aforementioned motlten metal nozzle and the relative position of aforementioned cooling roller, at aforementioned cooling roller direction of rotation rear, contact with aforementioned cooling surface, blocking is because the rotation of aforementioned cooling roller, along aforementioned cooling surface, be involved in the roller surface atmosphere cut-off of aforementioned motlten metal nozzle atmosphere on every side; At least from position that aforementioned metal sheet band and aforementioned cooling surface are peeled off, to the position that is provided with aforementioned roller surface atmosphere cut-off, extend along aforementioned cooling roller direction of rotation, surround aforementioned cooling roller, cover aforementioned cooling surface, and the peripheral atmosphere cut-off of the roller that stands away with aforementioned cooling surface; Around aforementioned motlten metal nozzle, supply with the first air-flow feedway of inert gas; At least from the position that aforementioned metal sheet band and aforementioned cooling surface are peeled off, between the position that is provided with aforementioned atmosphere cut-off, with aforementioned cooling surface from a distance, inert gas is supplied to the second air-flow feedway of aforementioned cooling surface.
16. metal sheet band manufacturing installation as claimed in claim 15 is characterized by, aforementioned atmosphere cut-off has at least: depart from aforementioned motlten metal nozzle, be located at the roller front atmosphere baffle board in front, aforementioned cooling roller direction of rotation the place ahead; Depart from aforementioned motlten metal nozzle location, be positioned at the both sides, direction of rotation the place ahead of aforementioned cooling roller, clamp aforementioned cooling roller, a pair of roller the place ahead atmosphere baffle board that contacts with aforementioned roller front atmosphere baffle board; From aforementioned cooling roller direction of rotation the place ahead, rearward extend, contact with the upper end-face edge of aforementioned roller the place ahead atmosphere baffle board, be positioned at the roller top atmosphere baffle board of aforementioned cooling roller top; Clamp aforementioned cooling roller, a pair of roller side atmosphere baffle board that contacts with the peripheral atmosphere cut-off of aforementioned roller the place ahead atmosphere baffle board and aforementioned roller; Aforementioned roller top atmosphere baffle board along with advancing in the direction of rotation rear to aforementioned cooling roller, contacts with the aforementioned cooling surface of aforementioned cooling roller; The front end of the aforementioned motlten metal ejection part of aforementioned motlten metal nozzle connects the nozzle installing hole on the atmosphere baffle board of aforementioned roller top, and is relative with the aforementioned cooling surface of aforementioned cooling roller.
17. metal sheet band manufacturing installation as claimed in claim 16 is characterized by, aforementioned roller top atmosphere baffle board is from direction of rotation the place ahead of aforementioned cooling roller, towards the smooth extension of cooling surface of aforementioned cooling roller.
18. metal sheet band manufacturing installation as claimed in claim 16, it is characterized by, aforementioned roller top atmosphere baffle board is from direction of rotation the place ahead of aforementioned cooling roller, towards the cooling surface extension of aforementioned cooling roller, simultaneously to the peripheral atmosphere cut-off of aforementioned roller interior curve.
19. metal sheet band manufacturing installation as claimed in claim 16 is characterized by, and on atmosphere baffle board above the aforementioned roller, has done at least more than one, towards the inner outstanding demarcation strip of the peripheral atmosphere cut-off of aforementioned roller.
20. metal sheet band manufacturing installation as claimed in claim 16 is characterized by, and on the atmosphere baffle board of aforementioned roller front, does the through port that the aforementioned metal strip passes through.
21. metal sheet band manufacturing installation as claimed in claim 15 is characterized by, the aforementioned first air-flow feedway can be supplied with two kinds of inert gases.
22. metal sheet band manufacturing installation as claimed in claim 21, it is characterized by, the aforementioned first air-flow feedway has: leave aforementioned motlten metal nozzle and the relative position of aforementioned cooling roller, be positioned at first air current spray nozzle and second air current spray nozzle at the direction of rotation rear of aforementioned cooling roller; Leave aforementioned motlten metal nozzle and the relative position of aforementioned cooling roller, be positioned at the 3rd air current spray nozzle and the 4th air current spray nozzle in direction of rotation the place ahead of aforementioned cooling roller; With the aforementioned motlten metal spray nozzle front end of encirclement, supply with the 6th air current spray nozzle of the hollow ring of inert gas.
23. metal sheet band manufacturing installation as claimed in claim 21, it is characterized by, aforementioned first air current spray nozzle is from the roughly tangential direction of aforementioned cooling roller, and towards the preceding extreme direction configuration of aforementioned motlten metal nozzle, it can spray the inert gas than the indifferent gas body weight of other air current spray nozzle ejection; Aforementioned second air current spray nozzle is located between aforementioned motlten metal nozzle and aforementioned first air current spray nozzle, and it is injected into gas from the air-flow of aforementioned first air current spray nozzle ejection.
24. metal sheet band manufacturing installation as claimed in claim 21 is characterized by, aforementioned inert gas is N 2And Ar.
25. metal sheet band manufacturing installation as claimed in claim 15 is characterized by, the gas flow that sprays from the aforementioned first air-flow feedway is 200～600 liters/minute.
26. metal sheet band manufacturing installation as claimed in claim 15 is characterized by, the gas flow that sprays from the aforementioned second air-flow feedway is 180～380 liters/minute.
27. metal sheet band manufacturing installation as claimed in claim 15 is characterized by, and leaving aforementioned motlten metal nozzle location, in the place ahead of aforementioned cooling roller direction of rotation, is provided with atmosphere and is detained part.
28. metal sheet band manufacturing installation as claimed in claim 21 is characterized by, the gas flow that sprays from the aforementioned first air-flow feedway is 200～600 liters/minute.
29. metal sheet band manufacturing installation as claimed in claim 21 is characterized by, the gas flow that sprays from the aforementioned second air-flow feedway is 180～380 liters/minute.
30. metal sheet band manufacturing installation as claimed in claim 21 is characterized by, and in the position of leaving aforementioned motlten metal nozzle, in the place ahead of aforementioned cooling roller direction of rotation, is provided with atmosphere and is detained part.
31. metal sheet band manufacture method, it be from and have between the cooling roller of cooling surface and keep certain intervals, facing to the motlten metal nozzle of aforementioned cooling surface, molten alloy is injected on the aforementioned cooling roller of rotation, sharply cool off and form the method for metal sheet band; It is characterized by, utilize the atmosphere cut-off to cover at least a portion of aforementioned roller periphery and be the front end of the ejection part of aforementioned motlten metal nozzle at least, to prevent since the atmosphere that the rotation of aforementioned cooling roller causes be involved in, and aforementioned motlten metal is injected on the aforementioned cooling roller, and form metal sheet band.
32. metal sheet band manufacture method as claimed in claim 31 is characterized by, inert gas is supplied to aforementioned motlten metal nozzle or cooling roller at least one side around, simultaneously with molten alloy ejection, sharply cooling, and form metal sheet band.
33. metal sheet band manufacture method as claimed in claim 32 is characterized by, aforementioned inert gas is supplied with by a plurality of air-flow feedwaies.
34. metal sheet band manufacture method as claimed in claim 32 is characterized by, and supplies with two kinds of inert gases at least, to form metal sheet band.
35. metal sheet band manufacture method as claimed in claim 34 is characterized by, aforementioned two kinds of inert gases are N 2And Ar.
CN 99108005 1998-06-09 1999-06-04 Apparatus and method for mfg. thin metal strip Pending CN1240686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 99108005 CN1240686A (en) 1998-06-09 1999-06-04 Apparatus and method for mfg. thin metal strip

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP161155/1998 1998-06-09
JP232118/1998 1998-08-18
JP240818/1998 1998-08-26
CN 99108005 CN1240686A (en) 1998-06-09 1999-06-04 Apparatus and method for mfg. thin metal strip

Publications (1)

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CN1240686A true CN1240686A (en) 2000-01-12

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CN 99108005 Pending CN1240686A (en) 1998-06-09 1999-06-04 Apparatus and method for mfg. thin metal strip

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101616762B (en) * 2007-01-20 2011-12-14 Mkm曼斯菲尔德克普夫与梅辛有限公司 Method and apparatus for casting ne metal baths, particularly copper or copper alloys
CN101426601B (en) * 2006-04-26 2013-01-02 株式会社Ihi Sealing apparatus for twin-roll casting machine
CN113333697A (en) * 2021-05-20 2021-09-03 北京科技大学 Three-roller thin belt continuous casting machine with stripping roller
CN114570900A (en) * 2022-03-03 2022-06-03 大连交通大学 Device and method for continuous casting and extrusion forming of copper and copper alloy

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101426601B (en) * 2006-04-26 2013-01-02 株式会社Ihi Sealing apparatus for twin-roll casting machine
CN101616762B (en) * 2007-01-20 2011-12-14 Mkm曼斯菲尔德克普夫与梅辛有限公司 Method and apparatus for casting ne metal baths, particularly copper or copper alloys
CN113333697A (en) * 2021-05-20 2021-09-03 北京科技大学 Three-roller thin belt continuous casting machine with stripping roller
CN113333697B (en) * 2021-05-20 2022-03-04 北京科技大学 Three-roller thin belt continuous casting machine with stripping roller
CN114570900A (en) * 2022-03-03 2022-06-03 大连交通大学 Device and method for continuous casting and extrusion forming of copper and copper alloy
CN114570900B (en) * 2022-03-03 2024-02-02 大连交通大学 Device and method for continuous casting and extrusion molding of copper and copper alloy

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