WO1994006583A1 - Method of casting continuous slab - Google Patents
Method of casting continuous slab Download PDFInfo
- Publication number
- WO1994006583A1 WO1994006583A1 PCT/JP1992/001205 JP9201205W WO9406583A1 WO 1994006583 A1 WO1994006583 A1 WO 1994006583A1 JP 9201205 W JP9201205 W JP 9201205W WO 9406583 A1 WO9406583 A1 WO 9406583A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- time
- mold
- slab
- solidified shell
- shell
- Prior art date
Links
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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
Definitions
- the present invention relates to a continuous metal structure, particularly a vertical continuous structure.
- the present invention relates to a method of manufacturing a continuous field piece that can reduce the depth of a simulation mark and obtain a piece with less segregation of a mark valley.
- the present invention significantly reduces segregation at the oscillation mark valleys on the surface of a piece, as well as high cycle conditions, even in a low cycle with a small life frequency f, and has a stable structure. It is an object of the present invention to provide a method for extracting a connecting piece that enables the drawing. Disclosure of the invention
- the present invention relates to a positive strip and a negative strip while vibrating in a vertical direction a mold for a vertical continuous structure having two pairs of cylindrical walls forming a structure. At least one pair of ⁇ -shaped walls is moved away from the solidified shell at one time in each time period within the time zone, and the ⁇ -shaped walls are moved away from the solidified shell during other time periods. That repeats during continuous production This is the construction method.
- a positive strip having no negative strip time zone while vibrating in a vertical direction a vertical continuous manufacturing die formed by forming a manufacturing space by two pairs of die walls. At least one pair of ⁇ -shaped walls is moved away from the solidified shell at one time in each of the ⁇ -shaped rising and falling zones, and the other ⁇ -shaped rising and falling time zones.
- a series of operations for bringing the ⁇ -shaped wall away from the solidification shell into close proximity can be repeated during continuous production.
- FIG. 1 is a graph showing a temporal change of a vertical vibration velocity and a horizontal displacement of a rectangular wall according to an embodiment of the present invention.
- FIG. 2 is a graph showing the time-dependent changes in the vertical vibration velocity of the ⁇ type and the horizontal displacement of the ⁇ type wall according to another embodiment of the present invention.
- FIG. 3 is a schematic perspective view showing a ⁇ -shaped horizontal moving device used for carrying out the present invention.
- FIG. 4 is a schematic diagram showing an oscillation mark and a segregation layer.
- FIG. 5 is a graph showing a conventional type I vibration waveform and a type III retraction and forward timing.
- FIG. 6 is a schematic diagram between the ⁇ -shaped wall and the solidified sur. BEST MODE FOR CARRYING OUT THE INVENTION
- the mold powder 10 on the molten steel 11 flows sufficiently between the mold wall 9 and the solidification shell 12 to reduce the frictional force between the rust mold wall 9 and the solidification shell.
- Y indicates the direction of pulling out one piece.
- the frictional force acting on the initial type solidified shell in the type II mask portion is Considering the frictional force between the mold and the solidified shell, the shear force of the mold powder between the mold and the solidified shell can be calculated by the following equation.
- V Relative velocity between the ⁇ type wall and the solidification shell
- the friction force F acting on the solidified shell decreases when the distance X between the ⁇ type and the solidified shell is increased. That is, according to the present invention, the tensile force and the compressive force acting on the shell of the meniscus portion in the early stage of solidification can be greatly reduced, and as a result, the continuity of the solidified shell is maintained, so that the oscillation mark depth is shallow. In other words, the probability that a prayer is formed in the Mark Valley is smaller than in the conventional technology.
- the effects described above are not largely affected by the waveform of vertical vibration waveform ⁇ ⁇ , which causes the wall of the mold to move forward and backward (close and open) in the horizontal direction (hereinafter referred to as horizontal vibration).
- the longitudinal vibration shown in Fig. 1 is a sinusoidal wave, and the horizontal vibration is a trapezoidal wave.
- the amplitude of the horizontal vibration is desirably within 1 mm in order to prevent the risk of the molten metal to enter the gap between the rectangular corners and to cause a restraint break.
- a short side 2 of a rectangular shape is fixed to a long side 1 of a rectangular shape through a panel 3 for a short side clamp.
- the method of doing it is taken.
- the opening and closing of the short-side clamp hydraulic cylinder 4 is provided in the hydraulic circuit. Therefore, in the present invention, the opening and closing of the short-side clamp hydraulic cylinder 4 is also provided in the hydraulic circuit.
- the ⁇ -shaped movement is performed.
- 7 indicates a hydraulic motor
- 8 indicates a hydraulic tank. If a gap is left between the long side of the mold and the short side of the mold during fabrication, molten steel will enter the gap and cause trouble. easy. Therefore, the retraction amount of type ⁇ shall be within lmm.
- the conventional longitudinal vibration (sign wave) and the case of the vibration wave shown in FIGS. 5 (a) and (b) shown in Japanese Patent Application Laid-Open No. 2-290656 are disclosed. A survey was also conducted. Fig.
- Fig. 5 (a) shows the case where the vibration of type III moves the type wall backward during the negative strip period
- Fig. 5 (b) shows the type when the type III descends. This is the case where is retracted.
- Vibration conditions Oscillation Remarks Horizontal vibration conditions Thickness Occurrence rate
- Table 1 shows the results of the above slab comparison between Examples 1 and 2 and the conventional method. Table 1 shows that, according to the present invention, as compared with the conventional method, the incidence of occurrence of the prayer in the oscillation valley due to the thickness is significantly reduced and almost completely eliminated. I understand. Industrial applicability
- the wall of the mold is opened and closed horizontally with respect to the solidification elbow in accordance with the timing of the longitudinal vibration of the mold (forward and backward).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69225980T DE69225980T2 (en) | 1992-09-22 | 1992-09-22 | CONTINUOUS CASTING OF SLABS IN OSCILLATING CHOCOLATE WITH HORIZONTALLY RETRACTABLE WALLS |
CA002098572A CA2098572C (en) | 1992-09-22 | 1992-09-22 | Casting process for continuous castings |
KR1019930702024A KR100201947B1 (en) | 1992-09-22 | 1992-09-22 | Method of casting continuous slab |
PCT/JP1992/001205 WO1994006583A1 (en) | 1992-09-22 | 1992-09-22 | Method of casting continuous slab |
EP92920028A EP0618023B1 (en) | 1992-09-22 | 1992-09-22 | casting continuous slab in oscillated mold with horizontally retractable walls |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002098572A CA2098572C (en) | 1992-09-22 | 1992-09-22 | Casting process for continuous castings |
PCT/JP1992/001205 WO1994006583A1 (en) | 1992-09-22 | 1992-09-22 | Method of casting continuous slab |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994006583A1 true WO1994006583A1 (en) | 1994-03-31 |
Family
ID=25676288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1992/001205 WO1994006583A1 (en) | 1992-09-22 | 1992-09-22 | Method of casting continuous slab |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA2098572C (en) |
WO (1) | WO1994006583A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015093277A (en) * | 2013-11-08 | 2015-05-18 | 新日鐵住金株式会社 | Mold for continuous casting and continuous casting method using the same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6418553A (en) * | 1987-07-13 | 1989-01-23 | Kawasaki Steel Co | Instrument for detecting friction force between mold and cast slab in continuous casting apparatus |
JPH02290656A (en) * | 1988-12-08 | 1990-11-30 | Kawasaki Steel Corp | Method for oscillating mold for vertical type continuous casting |
JPH0399756A (en) * | 1989-09-11 | 1991-04-24 | Kawasaki Steel Corp | Device for oscillating mold in continuous casting equipment |
JPH03297546A (en) * | 1990-04-16 | 1991-12-27 | Kawasaki Steel Corp | Method for oscillating mold for vertical type continuous casting |
JPH04143057A (en) * | 1990-10-02 | 1992-05-18 | Kawasaki Steel Corp | Method for oscillating mold for vertical type continuous casting |
-
1992
- 1992-09-22 WO PCT/JP1992/001205 patent/WO1994006583A1/en active IP Right Grant
- 1992-09-22 CA CA002098572A patent/CA2098572C/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6418553A (en) * | 1987-07-13 | 1989-01-23 | Kawasaki Steel Co | Instrument for detecting friction force between mold and cast slab in continuous casting apparatus |
JPH02290656A (en) * | 1988-12-08 | 1990-11-30 | Kawasaki Steel Corp | Method for oscillating mold for vertical type continuous casting |
JPH0399756A (en) * | 1989-09-11 | 1991-04-24 | Kawasaki Steel Corp | Device for oscillating mold in continuous casting equipment |
JPH03297546A (en) * | 1990-04-16 | 1991-12-27 | Kawasaki Steel Corp | Method for oscillating mold for vertical type continuous casting |
JPH04143057A (en) * | 1990-10-02 | 1992-05-18 | Kawasaki Steel Corp | Method for oscillating mold for vertical type continuous casting |
Non-Patent Citations (1)
Title |
---|
See also references of EP0618023A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015093277A (en) * | 2013-11-08 | 2015-05-18 | 新日鐵住金株式会社 | Mold for continuous casting and continuous casting method using the same |
Also Published As
Publication number | Publication date |
---|---|
CA2098572C (en) | 1999-12-21 |
CA2098572A1 (en) | 1994-03-23 |
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