CN108526425B - Composite metal continuous casting device and continuous casting method - Google Patents
Composite metal continuous casting device and continuous casting method Download PDFInfo
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- CN108526425B CN108526425B CN201810293808.1A CN201810293808A CN108526425B CN 108526425 B CN108526425 B CN 108526425B CN 201810293808 A CN201810293808 A CN 201810293808A CN 108526425 B CN108526425 B CN 108526425B
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- metal liquid
- crystallizer
- isolator
- composite metal
- base metal
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- 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
- B22D11/14—Plants for continuous casting
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- 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
- B22D11/007—Continuous casting of metals, i.e. casting in indefinite lengths of composite ingots, i.e. two or more molten metals of different compositions being used to integrally cast the ingots
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a composite metal continuous casting device, which comprises a crystallizer and a tundish, wherein an isolator is suspended in the crystallizer, and a cylindrical space is formed between the isolator and the crystallizer, so that the crystallizer is divided into an inner cavity and an outer cavity; the isolator is aligned with the top of the crystallizer; the upper end of the inner cavity is provided with a base metal liquid pouring gate, the upper end of the outer cavity is provided with a composite metal liquid pouring gate, and the top of the isolator is provided with a fixed arm which is fixedly connected with a crystallizer vibration table so as to ensure that the isolator and the crystallizer synchronously vibrate; the tundish is internally provided with an S-shaped partition wall which separates the tundish into a base metal liquid receiving groove and a composite metal liquid receiving groove, and the base metal liquid receiving groove and the composite metal liquid receiving groove are respectively injected into a base metal liquid pouring gate and a composite metal liquid pouring gate in the crystallizer through a base metal liquid long water gap and a composite metal liquid long water gap.
Description
Technical Field
The invention relates to a metallurgy continuous casting technology, in particular to a composite metal continuous casting device and a continuous casting method.
Background
Composite steels such as: the pipe, the bar wire, the plate and the like are composite steel with the mechanical property of base steel and the corrosion resistance and other properties of composite metal. In the use process, the service life and the aesthetic degree of the steel can be greatly improved, and the method is a development direction of the application of the steel. The method for realizing metallurgical compounding of the base metal and the composite metal is few, and the cost is high, for example, electric heating spraying and the like, so that a user cannot bear the high price.
Therefore, a method for manufacturing a composite steel billet, which can realize metallurgical compounding of a base metal and a composite metal and can be produced at lower cost and higher production efficiency, is urgently needed.
Disclosure of Invention
In view of the drawbacks of the prior art, the present invention provides an efficient method and apparatus for continuous casting of composite metals, which provides a composite metal billet in a metallurgical composite state.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a compound metal continuous casting device, includes crystallizer and tundish, its characterized in that: the isolator is suspended in the crystallizer, and a cylindrical space is formed between the isolator and the crystallizer, so that the crystallizer is divided into an inner cavity and an outer cavity; the isolator is aligned with the top of the crystallizer; the upper end of the inner cavity is provided with a base metal liquid pouring gate, the upper end of the outer cavity is provided with a composite metal liquid pouring gate, and the top of the isolator is provided with a fixed arm which is fixedly connected with a crystallizer vibration table so as to ensure that the isolator and the crystallizer synchronously vibrate; the tundish is internally provided with an S-shaped partition wall which separates the tundish into a base metal liquid receiving groove and a composite metal liquid receiving groove, and the base metal liquid receiving groove and the composite metal liquid receiving groove are respectively injected into a base metal liquid pouring gate and a composite metal liquid pouring gate in the crystallizer through a base metal liquid long water gap and a composite metal liquid long water gap.
The isolator is made of refractory materials, a steel bar framework is arranged in the isolator, and the length of the isolator is smaller than that of the crystallizer.
A method for continuously casting composite metal is characterized by comprising the following steps:
1) heating the isolator to 700-1300 ℃, and installing the isolator and the crystallizer on a continuous casting machine;
2) simultaneously and respectively injecting the base metal liquid and the composite metal liquid into a base metal liquid receiving groove and a composite metal liquid receiving groove of a tundish;
3) respectively injecting the base metal liquid and the composite metal liquid into a base metal liquid pouring gate and a composite metal liquid pouring gate from a base metal liquid long water gap and a composite metal liquid long water gap; the dummy bar seals the bottom of the crystallizer;
4) the composite metal liquid contacting with the inner wall of the crystallizer is cooled, solidified and crusted, and the part contacting with the isolator is in a semi-solid state when the dummy bar is pulled out of the crystallizer;
5) the base metal liquid injected into the isolator is not solidified, and after leaving the isolator along with the dummy bar, the base metal liquid contacts with the semi-solid part of the inner layer of the composite metal solidified shell and partially melts the semi-solid part to form a mixed layer;
6) and (3) continuously solidifying the blank shell under the action of a cooling system along with the downward movement of the casting blank until the casting blank is completely solidified, so that the metallurgical fusion of the base metal and the composite metal is realized, and a metallurgical fusion composite metal blank is obtained.
The invention has the beneficial effects that: the metallurgical bonding method has the advantages that the metallurgical bonding of the base metal and the composite metal in the real sense is realized, and the strength of the bonding layer is high; a mixed layer is arranged between the base metal and the composite metal, so that the gradual transition from the performance of the mixed layer to the performance of the base can be realized, and the quality control in the rolling process is facilitated; the thickness of the mixed layer between the base metal and the composite metal is controllable, and the quality control of the composite metal is facilitated; fourthly, the method is suitable for both the plate and the wire; the direct composite casting of the liquid metal is achieved, reheating for metallurgical composite is not needed, and the method is efficient and energy-saving.
Drawings
FIG. 1 is a front view of a cross section of an isolator and a crystallizer;
FIG. 2 is a sectional top view of the isolator and the crystallizer;
FIG. 3 is a schematic view of the operation of the composite metal caster;
FIG. 4 is a schematic view of a tundish structure of the composite metal continuous casting machine;
wherein: the device comprises an isolator 1, a crystallizer 2, a base metal liquid 3, a composite metal liquid 4, a dummy bar 5, a mixing layer 6, a base metal liquid pouring gate 7, a composite metal liquid pouring gate 8, a fixed arm 9, a composite metal liquid long water gap 10, a base metal liquid long water gap 11, a tundish 12, a base metal liquid receiving groove 13, a composite metal liquid receiving groove 14 and a partition wall 15.
Detailed Description
The following description is given with reference to specific examples:
example 1:
and (3) carrying out composite continuous casting on ferrite 430 stainless steel and low-carbon steel Q345 steel:
1) heating the isolator 1 to 700-800 ℃, and installing the isolator and the crystallizer 2 on a continuous casting machine;
2) simultaneously injecting Q345 molten steel and 430 stainless steel into the base metal liquid receiving tank 13 and the composite metal liquid receiving tank 14 of the tundish 12 respectively;
3) q345 molten steel and 430 molten stainless steel are respectively injected into the base molten steel sprue 7 and the composite molten steel sprue 8 from the base molten steel sprue 11 and the composite molten steel sprue 10. The dummy bar 5 seals the bottom of the crystallizer;
4) the 430 stainless steel liquid which is contacted with the inner wall of the crystallizer 2 is cooled, solidified and crusted, and the part which is contacted with the isolator 1 is in a semi-solid state when being pulled out of the crystallizer 2 by the dummy bar 5;
5) the Q345 molten steel injected into the isolator 1 is not solidified, and after leaving the isolator 1 with the dummy bar, the Q345 molten steel contacts the semi-solid portion of the inner layer of the 430 stainless steel solidified shell and partially melts it to form the mixed layer 6. The thickness of the mixed layer is about 5 mm;
6) and (3) with the downward movement of the casting blank, the blank shell continues to solidify under the action of the cooling system until the casting blank is completely solidified, so that the metallurgical fusion of the 430 stainless steel and the Q345 steel is realized.
Example 2:
the austenitic 316 stainless steel and the low-carbon steel Q235 steel are compositely and continuously cast:
1) heating the isolator 1 to 730-830 ℃, and installing the isolator and the crystallizer 2 on a continuous casting machine;
2) q235 molten steel and 316 stainless steel are respectively injected into the base metal liquid receiving groove 13 and the composite metal liquid receiving groove 14 of the tundish 12 at the same time;
3) q235 molten steel and 316 stainless steel are respectively injected into the base molten steel pouring gate 7 and the composite molten steel pouring gate 8 from the base molten steel long pouring gate 11 and the composite molten steel long pouring gate 10. The dummy bar 5 seals the bottom of the crystallizer;
4) the molten Q235 liquid injected into the isolator 1 is not solidified, and after leaving the isolator 1 with the dummy bar, the molten Q235 liquid contacts the semi-solid part of the inner layer of the 316 stainless steel skull and partially melts it to form the mixed layer 6. The thickness of the mixed layer is about 6 mm;
5) and (3) with the downward movement of the casting blank, the blank shell continues to solidify under the action of the cooling system until the casting blank is completely solidified, so that the metallurgical fusion of 316 stainless steel and Q235 steel is realized.
Claims (2)
1. A continuous casting method of a composite metal continuous casting device, which comprises a crystallizer and a tundish, is characterized in that: the isolator is suspended in the crystallizer, and a cylindrical space is formed between the isolator and the crystallizer, so that the crystallizer is divided into an inner cavity and an outer cavity; the isolator is aligned with the top of the crystallizer; the upper end of the inner cavity is provided with a base metal liquid pouring gate, the upper end of the outer cavity is provided with a composite metal liquid pouring gate, and the top of the isolator is provided with a fixed arm which is fixedly connected with a crystallizer vibration table so as to ensure that the isolator and the crystallizer synchronously vibrate; an S-shaped partition wall is arranged in the tundish and separates the interior into a base metal liquid receiving groove and a composite metal liquid receiving groove, and the base metal liquid receiving groove and the composite metal liquid receiving groove are respectively injected into a base metal liquid pouring gate and a composite metal liquid pouring gate in the crystallizer through a base metal liquid long water gap and a composite metal liquid long water gap; the continuous casting method comprises the following steps:
1) heating the isolator to 700-1300 ℃, and installing the isolator and the crystallizer on a continuous casting machine;
2) simultaneously and respectively injecting the base metal liquid and the composite metal liquid into a base metal liquid receiving groove and a composite metal liquid receiving groove of a tundish;
3) respectively injecting the base metal liquid and the composite metal liquid into a base metal liquid pouring gate and a composite metal liquid pouring gate from a base metal liquid long water gap and a composite metal liquid long water gap; the dummy bar seals the bottom of the crystallizer;
4) the composite metal liquid contacting with the inner wall of the crystallizer is cooled, solidified and crusted, and the part contacting with the isolator is in a semi-solid state when the dummy bar is pulled out of the crystallizer;
5) the base metal liquid injected into the isolator is not solidified, and after leaving the isolator along with the dummy bar, the base metal liquid contacts with the semi-solid part of the inner layer of the composite metal solidified shell and partially melts the semi-solid part to form a mixed layer;
6) and (3) continuously solidifying the blank shell under the action of a cooling system along with the downward movement of the casting blank until the casting blank is completely solidified, so that the metallurgical fusion of the base metal and the composite metal is realized, and a metallurgical fusion composite metal blank is obtained.
2. The continuous casting method using the apparatus for continuously casting composite metal according to claim 1, characterized in that: the isolator is made of refractory materials, a steel bar framework is arranged in the isolator, and the length of the isolator is smaller than that of the crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810293808.1A CN108526425B (en) | 2018-03-30 | 2018-03-30 | Composite metal continuous casting device and continuous casting method |
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| CN201810293808.1A CN108526425B (en) | 2018-03-30 | 2018-03-30 | Composite metal continuous casting device and continuous casting method |
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| CN108526425B true CN108526425B (en) | 2020-09-01 |
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| CN113857463A (en) * | 2021-09-06 | 2021-12-31 | 盐城市联鑫钢铁有限公司 | Composite stainless steel pouring process and device |
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