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WO2000013821A1 - Procede de coulee continue et moule pour coulee continue - Google Patents

Procede de coulee continue et moule pour coulee continue Download PDF

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Publication number
WO2000013821A1
WO2000013821A1 PCT/JP1999/001036 JP9901036W WO0013821A1 WO 2000013821 A1 WO2000013821 A1 WO 2000013821A1 JP 9901036 W JP9901036 W JP 9901036W WO 0013821 A1 WO0013821 A1 WO 0013821A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
metal
slit nozzle
box
continuous production
Prior art date
Application number
PCT/JP1999/001036
Other languages
English (en)
Japanese (ja)
Inventor
Ikuo Sawada
Kensuke Okazawa
Kiyoshi Shigematsu
Masahiro Doki
Original Assignee
Nippon Steel Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP24927198A external-priority patent/JPH11147161A/ja
Application filed by Nippon Steel Corporation filed Critical Nippon Steel Corporation
Priority to AU27456/99A priority Critical patent/AU2745699A/en
Publication of WO2000013821A1 publication Critical patent/WO2000013821A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/07—Lubricating the moulds

Definitions

  • the present invention relates to a method for continuous production of metal having excellent cooling or lubricating properties between a mold and a piece, and a mold for continuous production.
  • the solidification of the piece progresses.
  • the molten steel 2 in contact with the water-cooled mold 1 via the lubricating powder 4 at the upper part of the mold begins to solidify, and is drawn out in the as-formed direction while solidifying and growing.
  • lubricating powder 4 is supplied between the mold and the piece while vibrating the mold to prevent seizure between the mold and the piece (or solidified shell).
  • the solidified shell 3 undergoing solidification and growth causes an air gap 8 between the mold and the piece due to solidification shrinkage and shrinkage due to 5-a transformation. Due to the presence of the air gap 8, the cooling rate is reduced at the lower portion of the inner surface of the mold ⁇ ⁇ ⁇ , which is one of the factors that hinders the growth of the solidified shell.
  • the thickness of the solidified seal after passing through the mold is small, and bulging defects and breakouts are easily induced.
  • the solidified shell after passing through the mold can be made thicker, and defects and breakout due to bulging can be reduced.
  • the present invention is characterized in that high-pressure gas is blown between the mold pieces and a gas flow that flows in the fabricating direction is formed by utilizing the Coanda effect described later to control the air gap.
  • the reason is that, as shown in Fig. 14, a distribution of hydrostatic pressure 9 (P + pgh; P: static pressure, p: density, g: gravitational acceleration, h: molten steel depth) occurs in the molten steel 2 in the direction of gravity.
  • the injected gas 5 flows from the higher hydrostatic pressure 9 to the lower hydrostatic pressure 9, and as a result, flows in a direction opposite to the production direction. In other words, the injected gas 5 disturbs the initially solidified portion, so that it is difficult to obtain a piece having a stable shape.
  • the Coanda effect is a principle that a fluid flows along a wall under predetermined conditions, and is widely used in air conditioners, gas turbine engines, and the like for the purpose of forming a flow along a wall by bending a blowing angle.
  • the shape of the outlet is a two-dimensional slit nozzle, and 2) at least three times the thickness of the outlet at the outlet where the flow is to be bent. It is advisable to secure conditions such as attaching an arc portion with an arc radius of 3), inclining the blowing angle in the direction in which it is desired to be bent, etc. (Reference: Mitsubishi Heavy Industries Technical Report Vol. 26, No. 3 (1980) 9) p206).
  • the inventors of the present invention have proposed a method of controlling the air gap by ejecting gas from the lower part of the inner surface of the mold between the mold 1 and the solidification cylinder 3 with a slit nozzle in the production progress direction, and using the ejector effect.
  • Kaihei 1 0—2 9 10 5 4) and its effectiveness has been confirmed, but some metals with low solidified shell strength may exhibit gas instability, resulting in more stable operation. Is required.
  • the gas flows upward between the mold and the piece, and the gas flow is unstable. Further, in this method, since the slit nozzle directly contacts the high-temperature piece or contacts the piece via powder, the melt damage of the slit nozzle is large and the slit nozzle is thermally deformed. In addition, the method causes powder adhesion and clogging of the slit nozzle. (Problems to be solved by the invention)
  • the present invention has been made in order to solve such a problem, and uses the Coander effect to form a gas flow in the production direction and reduce the pressure between the mold and the piece to eliminate the air gap. It is intended to provide an inexpensive continuous manufacturing mold suitable for high-speed manufacturing.
  • the present invention has been made in order to solve such a problem, and has a stable powder supply between a mold and a piece and excellent lubricity even when a high-speed structure and a high-viscosity powder are used.
  • an object of the present invention is to provide a mold for continuous production having excellent cooling ability by eliminating an air gap between the mold and the piece even at the lower part of the mold. Disclosure of the invention
  • the present inventors set the pressure between the mold and the piece in the lower part of the mold so that the powder supply between the mold and the piece can be stably increased, and the cooling capacity can be improved. Increased.
  • the pressure between the mold and the piece in the mold for continuous metal fabrication, make sure that the mold is completely in contact with the entire circumference of the mold bottom, or at least on the wide side, or between the piece and the mold.
  • a slit nozzle is provided on the upper surface or side surface of the recessed portion for cutting out the high-pressure fluid cut in parallel with the piece, and the ejector effect of the high-pressure fluid ejected from the slit nozzle causes a vacuum.
  • the slit nozzle does not directly contact the piece, and does not directly contact the piece via the padder.
  • the high-pressure fluid refers to a high-pressure gas (air, nitrogen, inert gas, steam, etc.), a high-pressure liquid (water, etc.) and a high-pressure gas-liquid mixture (air + water droplet, etc.).
  • the description is limited to the high-pressure gas.
  • the downward blowing shall include not only the case of vertically downward but also the case of giving an angle to one side from the vertical downward so that high-pressure gas collides with the piece.
  • the entire recessed part 14 and the part surrounding the piece 3 are designed so that the surface of the mold and the mold 1 are completely out of contact with each other.
  • a slit nozzle 6 for blowing down high-pressure gas which is provided in the circumferential or at least on the wide surface 11 side and is arranged in parallel on the upper surface 15 or the side surface 16 of the recess, parallel to the one surface, is installed.
  • the slit nozzle provided on the bottom of the mold at the bottom of the mold, or the slit nozzle provided on the top or side of the recess provided so that the mold and the mold are completely out of contact A continuous continuity of metal characterized by reducing pressure in the space surrounded by the ⁇ , ⁇ pieces and high-pressure fluid by blowing high-pressure fluid downward from the entire circumference or at least from the wide side to surround Construction method.
  • a box is connected to the bottom of the box so that it is connected to the box, and the bottom provided at the bottom of the box, or the recess provided so that the box and the box are completely out of contact.
  • a high-pressure fluid is blown down from the slit nozzle provided on the upper surface or side surface of the part from the whole circumference or at least from the wide side to surround the piece, so that it is surrounded by a box type, a piece and the high-pressure fluid.
  • a continuous metal production method characterized by depressurizing a space.
  • the mold for continuous production of the present invention is as follows.
  • a slit nozzle for blowing out high-pressure fluid downwardly which is arranged on the entire bottom surface or at least on the bottom surface on the wide surface side so as to surround the piece at the bottom bottom surface of the mold.
  • a box is connected to the lower part of the metal mold so as to be connected to the metal mold, and at the bottom bottom of the box, the entire circumference or at least a wide area surrounding the metal piece
  • a slit for continuous production of metal comprising a slit nozzle for downwardly blowing high-pressure fluid disposed on the bottom surface on the side.
  • a recess is formed at the bottom of the mold so that the piece and the mold are completely out of contact with each other, and the entire circumference or at least the wide surface side surrounds the piece.
  • a slit nozzle for downwardly blowing high-pressure fluid disposed on an upper surface of the concave portion.
  • a box is connected to the bottom of the mold so as to be connected to the mold, and the inside of the box is recessed so that the piece and the mold are completely out of contact. Is provided on the entire circumference or at least on the wide surface side so as to surround the piece, and the slit nozzle for the high-pressure fluid, which is disposed on the A metal mold for continuous production, characterized by having a chirp.
  • a partition plate is provided between the lower outlet slit nozzle and the inner surface of the box on the upper surface side of the concave portion of the box.
  • the concave part is so formed that the piece and the wave mold are completely out of contact with each other.
  • the concave part for continuous production of metal, characterized in that it has a slit nozzle for downward blowing of high-pressure fluid disposed on the side of the recess
  • the horizontal distance X, from the side surface of the recess provided with the slit nozzle for downward blowing to the inner surface of the above-mentioned mold, is 0.5 (mm) ⁇ X, ⁇ 5 (mm).
  • a box is connected to the lower part of the mold so that it is connected to the mold, and the piece and the mold are completely out of contact on the inner surface of the box.
  • a continuous metal structure wherein the recess is provided on the entire circumference or at least on the wide surface side so as to surround the piece, and has a slit nozzle for downwardly blowing high-pressure fluid disposed on the side surface of the recess.
  • the gist of the present invention is to provide a high-pressure gas blowing slit nozzle that is cut horizontally on at least the entire circumference of the lower part of the mold, or at least on a wide surface, in a mold for continuous metal fabrication.
  • the flow path of the high-pressure gas reaching the slit nozzle is configured to generate a Coanda effect, and the high pressure gas blown out of the slit nozzle causes a piece to be sucked to the inner wall of the ⁇ type by the Coanda effect.
  • ⁇ ⁇ Eliminates the air gap generated between the pieces, enhances the heat removal capability of the mold, and enables high-speed fabrication.
  • the shape of the flow path of the high-pressure gas to the slit nozzle is formed in the vicinity of the slit nozzle in an arc-shaped or convexly outwardly protruding shape, and its curvature is further increased.
  • the radius is at least three times the width of the high-pressure gas flow path.
  • Another configuration is that the flow path of the high-pressure gas to the slit nozzle is inclined in the production direction, and the angle of the inclination in the production direction is 60 degrees or less.
  • a configuration combining the above two that is, the flow path of the high-pressure gas reaching the slit nozzle is inclined in the manufacturing progress direction, and is further inclined in the manufacturing direction. Is 60 degrees or less, and the shape of the flow path near the slit nozzle in the structure progressing direction is a circular arc or an outwardly convex curve, and the radius of curvature is at least three times the width of the high-pressure gas flow path. It is characterized by the following. That is, the mold for continuous production of the present invention is as follows.
  • a metal mold for continuous production of metal which has a slit nozzle for blowing high-pressure gas, which is cut all around the lower part of the mold or at least horizontally on a wide surface, and the flow of high-pressure gas to the slit nozzle.
  • a mold for continuous metal fabrication characterized in that the shape of the structure in the direction of the structure in the vicinity of the slit nozzle in the road is arc-shaped or outwardly curved.
  • a slit nozzle for blowing high-pressure gas which is cut all around the lower part of the mold or at least horizontally on at least a wide surface, is used for flowing high-pressure gas to the slit nozzle.
  • a mold for continuous production of metal characterized in that the road is inclined in the production progress direction.
  • a metal mold for continuous production of metal which has a slit nozzle for blowing out high-pressure gas, which is cut all around the lower part of the mold or at least horizontally on a wide surface, and the flow of the high-pressure gas to the slit nozzle.
  • the angle of the flow path of the high-pressure gas inclined toward the production direction is not more than 60 degrees, and the shape of the flow direction near the slit nozzle in the production direction is an arc or outside.
  • FIG. 1 (a) is a schematic view of the type III (section (5)) of the present invention.
  • FIG. 1 (b) is an explanatory diagram of the horizontal distance X from the inner surface of the square shape in FIG. 1 (a) to the downward blowing slit nozzle.
  • FIG. 2 is a bird's-eye view of the type II [Section (5)] of the present invention.
  • FIG. 3 (a) is a schematic view of the type III [section (11)] of the present invention.
  • Fig. 3 (b) shows the horizontal distance X from the inner surface of the square in Fig. 3 (a) to the slit nozzle for downward blowing.
  • the horizontal distance X from the side surface of the concave portion provided with the slit nozzle for downward blowing of the rectangular shape of the present invention to the inner surface of the rectangular shape, and FIG. 3 (a) and the vertical distance of the concave shape of the rectangular shape of the present invention. It is an explanatory diagram of a length a and a horizontal length b ⁇
  • FIG. 4 shows a bird's-eye view of the type II [section (11)] of the present invention.
  • FIG. 5 is a schematic diagram of the type III [section (8)] of the present invention.
  • FIG. 6 is a schematic view of the type III [section (19)] of the present invention.
  • FIG. 7 is a diagram showing the relationship between the degree of decompression ⁇ and the horizontal distance X from the inner surface of the type II to the slit nozzle in the type II shown in FIG.
  • FIG. 8 is a schematic diagram of the air gap control using the present invention.
  • FIG. 9 is a schematic view of a vertical cross section perpendicular to the inner surface of the ⁇ type of the first ⁇ type of the present invention.
  • FIG. 10 is a diagram schematically showing a state in which the slit nozzle for blowing high-pressure gas on the inner surface of the ⁇ type according to the present invention is cut.
  • (A) has a slit nozzle on the entire surface, and
  • (b) has a slit nozzle only on the wide surface.
  • FIG. 11 shows a schematic view of a vertical cross section perpendicular to the inner surface of the mold of the second mold of the present invention.
  • FIG. 12 shows a schematic view of a vertical cross section perpendicular to the inner surface of the second type II gun type of the present invention.
  • FIG. 13 is a schematic view of an air gap generated by a conventional structure.
  • Figure 14 shows a schematic diagram when air is blown in with a conventional slit nozzle.
  • the metal to which the present invention is applied is steel, aluminum, titanium, or the like, and it is particularly preferable to apply the present invention to a continuous steel structure.
  • FIG. 1 is a vertical sectional view perpendicular to the inner surface of a type III showing the present invention described in the section (5).
  • the ⁇ mold At the bottom of the ⁇ mold, it is arranged all around the ⁇ piece 3 so as to surround the ⁇ piece 3 and is parallel to the ⁇ piece surface, or at least on the bottom surface on the wide surface 11 side, parallel to the ⁇ piece surface. It has a slit nozzle 6 for blowing down high-pressure gas.
  • the slit nozzle provided on the lower surface of the bottom of the mold ⁇ is a slit nozzle 6 cut parallel to the surface of the piece as shown in FIG. 2 (a).
  • a slit nozzle provided only on the bottom surface of the wide surface is a slit nozzle cut parallel to the piece only on the bottom surface of the two wide surfaces 11 as shown in Fig. 2 (b). 6 is shown.
  • FIG. 5 is a vertical sectional view perpendicular to the inner surface of the ⁇ type, showing the present invention described in the section (8).
  • the conventional type ⁇ is left as it is, for blowing out high-pressure gas.
  • a box 17 having a slit nozzle 6 is connected below the conventional mold 1 to provide a device having the same effect as the device described in claim 3.
  • FIG. 3 is a vertical sectional view perpendicular to the inner surface of the mold shown in FIG. 3 showing the present invention described in the paragraph (11), and the recess at the lower part of the mold so that the piece and the mold are completely out of contact.
  • the part 14 is provided on the entire circumference or at least on the wide surface side so as to surround the piece, and for downward blowing of high-pressure gas arranged parallel to the piece surface at the upper surface 15 of the concave part 14 It has a slit nozzle 6.
  • the slit nozzles provided on the upper surface of the concave portion are formed on the upper surface of the concave portion with two wide surfaces 11 and the upper surface of two narrow surfaces 12 as shown in Fig. 4 (a).
  • the slit nozzle 6 is shown cut parallel to the piece so as to form a slit. As shown in Fig. 4 (b), the slit nozzle provided only on the upper surface of the wide concave portion was cut parallel to the piece only on the upper surface of the concave portion of the two wide surfaces 11 as shown in Fig. 4 (b). Shows slit nozzle 6.
  • FIG. 6 is a vertical sectional view perpendicular to the inner surface of the mold 1 showing the present invention described in the item (19).
  • a box 17 connected to the mold 1 is connected to the lower part of the mold.
  • a recess 14 is provided on the entire surface or at least on the wide side to surround the piece so that the piece and the mold are completely out of contact with each other. It has a slit nozzle 6 for injecting high-pressure gas downward, which is arranged in parallel to the nozzle.
  • depressurization can be performed at low cost by using the ejected gas jet effect without adding an expensive mechanical mechanism to the fixed die. It controls the air gap to reduce product defects due to bulging and reduced productivity due to breakout, which are problems in continuous operation.
  • the degree of vacuum ⁇ P varies depending on the type of steel and the production speed, but the effect is seen at a value of about 0 to 0.8 [atm]. Also, the blowing gas velocity U. It is also possible to control the degree of vacuum positively with time by changing the time.
  • the size of the ⁇ shape is about the following range assuming that the long side ⁇ , the short side m, and the ⁇ shape length n.
  • the degree of pressure reduction ⁇ P is 0, ⁇ P, 0.8 (atm), preferably 0.01 (atm) ⁇ 0.5 (atm).
  • the horizontal distance from the inner surface of the ⁇ mold to the slit nozzle is X (in the case of Fig. 1), X. (In the case of FIG. 3), X, and (in the case of FIG. 5) the horizontal distance from the inner surface of the box until Suritsu Tonozuru X 1, X 1. , X 1 , (in the case of FIG. 6), the range is approximately as follows.
  • Inlet gas velocity U. Is approximately in the following range. 30 (m / s) ⁇ U. ⁇ 1 0 0 0 (m / s)
  • the width d of the slit nozzle is approximately in the following range.
  • the range is as follows.
  • the metal to which the present invention is applied is steel, aluminum, titanium, or the like, and it is particularly preferable to apply the present invention to a continuous steel structure.
  • FIG. 8 A method for controlling an air gap in a continuous structure using the fixed mold of the present invention will be described with reference to the drawings.
  • high-pressure gas 5 is blown between the mold 1 and the piece 3 on the inner surface of the mold lower portion, and the gas 5 flows in the structure progress direction, so that the space behind the gas 5 is depressurized or reduced.
  • the ⁇ -shaped lower inner surface refers to the ⁇ -shaped inner surface portion near the outlet in the manufacturing progress direction, and ⁇ ⁇ a slit nozzle cut horizontally 20 cm or less from the lower end of the ⁇ ⁇ and a high-pressure gas blown out therefrom.
  • the Coanda effect is used.
  • Figure 14 shows a typical This figure shows the behavior when a gas 5 is blown into a mold 1-piece 3 with a slit nozzle (straight slit nozzle with a gas blowing angle of 90 degrees to the mold inner surface).
  • the distribution of hydrostatic pressure 9 is on the molten steel side, and the hydrostatic pressure is higher vertically downward, and the same hydrostatic pressure is applied to the thin solidified seal in the mold.
  • gas 5 is blown in with the above-mentioned slit nozzle, the gas has the property of flowing from the higher hydrostatic pressure to the lower hydrostatic pressure, so that the gas flows in the direction opposite to the manufacturing direction. .
  • the gas disturbs the solidified shell in the initial solidification part and comes into direct contact with the molten steel, making operation impossible.
  • FIG. 9 is a vertical cross-sectional view perpendicular to the inner surface of the ⁇ type showing the present invention described in the items (22) to (23).
  • a slit nozzle 6 for blowing out high-pressure gas, which is cut horizontally, is provided on the entire circumference of the inner surface of the lower part of the mold, or at least on the wide surface 11.
  • the slit nozzle 6 provided on the entire circumference of the lower part of the mold is horizontal so that it is connected circumferentially to the two wide faces 11 and two narrow faces 12 of the mold inner face as shown in Fig. 10 (a).
  • the slit nozzle 6 cut off is shown.
  • the slit nozzle provided only on the wide surface refers to the slit nozzle 6 that is cut horizontally only on the two wide surfaces 11 of the ⁇ -shaped inner surface as shown in FIG. 10 (b).
  • the shape of the high-pressure gas flow path connected to the slit nozzle 6 near the slit nozzle in the structure progress direction side, preferably the width of the high-pressure gas flow path 10 (d in FIGS. 9, 11, 12) )
  • the arc shape or the outwardly convex curved shape with a radius of curvature R that is three times or more than that of) induces the Coanda effect, so that gas flows in the direction of production regardless of the hydrostatic pressure distribution. It is.
  • FIG. 11 is a vertical sectional view perpendicular to the inner surface of the mold shown in FIG. 11 showing the present invention described in the paragraphs (24) to (25).
  • the high-pressure gas passage leading to the slit nozzle 6 is shown in FIG.
  • a gas flow toward the production direction is formed.
  • the inclination angle is assumed to indicate 0 shown in FIG. In this case, when the conditions described in Claims 22 to 23 are not used together, it is preferable to set the inclination angle of the flow path to 30 degrees or less and set the Reynolds number Re to 2000 or more. .
  • FIG. 12 is a diagram showing the present invention described in the paragraphs (26) to (27), and is a combination of the above two methods.
  • the supply pressure of the high-pressure gas 5 will be described.
  • the distance between the slit nozzle position and the lower end of the mold is L (cm)
  • the hydrostatic pressure difference between the slit nozzle and the lower end of the mold, which acts when the air gap is completely eliminated is (LZ148) (a tm)
  • the gas supply pressure must be equal to or higher than the sum of (L / 148) (atm) to the total pressure loss of the gas flow system. .
  • a high-pressure gas is blown from the inner surface of the mold to the piece 3 so that the Coanda effect is generated to form a gas flow that flows in the manufacturing direction, and a vacuum is formed between the mold 1 and the piece 3.
  • the air gap is controlled at low cost by using the Coanda effect of the blown gas to control the air gap without adding an expensive mechanical mechanism to the fixed mold, and there is a problem in continuous operation. It is intended to reduce product defects caused by bulging and a decrease in productivity due to break defects.
  • Table 1 shows examples of the present invention described in the items (1), (11) and (17). Below, continuous production of steel was performed under the operating conditions shown in Table 1. First, in order to determine whether or not the air gap had disappeared, the degree of scratches on the inner surface of the mold after the fabrication was observed. As a result, in the conventional operation, from the middle to the lower part of the mold, except for the vicinity of the meniscus, no damage was observed as evidence of the contact between the pieces 3 and 1, indicating the presence of the air gap 8. On the other hand, on the inner surface of the mold after fabrication using the apparatus of the present invention, scratches were observed over the entire area from the meniscus to the lower part of the mold. This suggests that the air gap could be eliminated in the present invention.
  • Table 2 shows a comparison between the conventional type I and the type II of the present invention. Compared with the structure using the conventional mold, the bulging amount at the lower part of the mold was reduced to about 1/2 to 1 Z 3 in the structure using the mold of the present invention, and the effectiveness of the present invention was confirmed.
  • Table 5 shows a comparison between the conventional operation and the operation based on the present invention. Compared with the structure using the conventional mold, the amount of bulging at the lower part of the mold was reduced to about 1 Z 2 to 13 in the structure using the mold of the present invention, confirming the effectiveness of the present invention.
  • ADVANTAGE OF THE INVENTION According to the continuous manufacturing method and the continuous manufacturing die of the steel which concern on this invention, pressure reduction or a vacuum space is produced in a desired position by performing low-cost processing, and air gap control according to the steel type can be performed. In addition, chip defects and break defects were reduced.
  • the gas does not flow upward between the ⁇ type and the ⁇ piece, but always flows downward stably.
  • the present invention has a stable powder supply and excellent lubricity between the mold and the piece even when using a high-speed structure and a high-viscosity powder.
  • the air gap was eliminated, and a mold for continuous production with excellent cooling ability was provided.
  • the slit nozzle since the slit nozzle does not directly contact the high temperature piece or does not contact the piece through the powder, the melting damage of the slit nozzle is small.
  • the slit nozzle is economical because it does not thermally deform.
  • the air gap control according to the steel type can be performed by adding low-cost processing in the continuous manufacturing die of steel, and a piece defect and a break fault can be reduced.

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Abstract

L'invention concerne un procédé de coulée continue d'un métal, ce procédé consistant tout d'abord à améliorer la vitesse de refroidissement d'une pièce placée entre un moule et une billette, et à augmenter l'épaisseur d'une coque consolidée par un réglage de la largeur d'une fente d'aération séparant le moule et la billette (coque consolidée), cette fente d'aération étant due au rétrécissement de consolidation et de transformation de ladite billette. Ce procédé consiste ensuite à améliorer la productivité de ce procédé de coulée continue, ainsi que la qualité d'une pièce moulée, par une augmentation de l'apport de poudre, une réduction du gonflement et de l'arrachement de la billette, et une diminution de la rupture de la surface de cette billette. Cette invention concerne également un moule pour coulée continue d'un métal, ce moule comprenant: 1) des buses à fente (6) permettant de souffler un fluide haute pression vers le bas, ces fentes étant ménagées sur le fond de la surface inférieure du moule pour coulée continue (1), de manière à être placées dans le sens de toute la partie circonférentielle de ce fond, et ainsi à entourer la billette (3), ou au moins à former sur le fond la surface arrière dudit moule pour coulée continue, 2) un renfoncement (14) ménagé sur la surface intérieure de la partie inférieure de ce moule pour coulée continue (1), de sorte que la surface extérieure de la billette (3) et la surface intérieure du moule ne peuvent entrer en contact, ce renfoncement s'étendant dans le sens de toute la partie circonférentielle du fond de manière à entourer ladite billette (3), ou au moins la surface d'usure, lesdites buses à fente (6), ménagées sur la surface supérieure (15) ou latérale (16) dudit renfoncement, étant destinées à souffler un fluide haute pression, ou 3) une caisse (1) placée sur la partie inférieure du moule pour coulée continue (1) afin d'être assemblée à ce dernier, des buses à fente (6), ménagées sur la surface supérieure inférieure de cette caisse (17) ou sur la surface supérieure (15) ou latérale (16) dudit renfoncement (14), étant destinées à souffler un fluide haute pression.
PCT/JP1999/001036 1998-09-03 1999-03-04 Procede de coulee continue et moule pour coulee continue WO2000013821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27456/99A AU2745699A (en) 1998-09-03 1999-03-04 Continuous casting method and casting mold for continuous casting

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/249271 1998-09-03
JP24927198A JPH11147161A (ja) 1997-09-04 1998-09-03 連続鋳造方法および連続鋳造用鋳型

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WO2000013821A1 true WO2000013821A1 (fr) 2000-03-16

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CN (1) CN1272074A (fr)
AU (1) AU2745699A (fr)
WO (1) WO2000013821A1 (fr)

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JP6560838B1 (ja) * 2019-02-12 2019-08-14 株式会社神戸製鋼所 連続鋳造用鋳型および連続鋳造装置並びに連続鋳造方法
CN114406213A (zh) * 2022-01-20 2022-04-29 甘肃酒钢集团宏兴钢铁股份有限公司 一种气封式连铸结晶器装置
CN115401179B (zh) * 2022-08-23 2023-12-26 北京首钢股份有限公司 一种连铸坯结晶器短边冷却水的控制方法

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JPH04178249A (ja) * 1990-11-09 1992-06-25 Sumitomo Metal Ind Ltd 連続鋳造鋳型内の潤滑方法
JPH10291054A (ja) * 1997-04-21 1998-11-04 Nippon Steel Corp 連続鋳造用鋳型

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JPH04178249A (ja) * 1990-11-09 1992-06-25 Sumitomo Metal Ind Ltd 連続鋳造鋳型内の潤滑方法
JPH10291054A (ja) * 1997-04-21 1998-11-04 Nippon Steel Corp 連続鋳造用鋳型

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