CN110756587B - Method for preparing metal plate by centrifugal casting - Google Patents
Method for preparing metal plate by centrifugal casting Download PDFInfo
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- CN110756587B CN110756587B CN201910932672.9A CN201910932672A CN110756587B CN 110756587 B CN110756587 B CN 110756587B CN 201910932672 A CN201910932672 A CN 201910932672A CN 110756587 B CN110756587 B CN 110756587B
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- metal
- casting
- blank
- tube blank
- pipe
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- 239000002184 metal Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 238000005096 rolling process Methods 0.000 claims abstract description 30
- 238000005266 casting Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000009966 trimming Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract 3
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 7
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention belongs to the field of steel smelting, and particularly relates to a method for preparing a metal plate by centrifugal casting. The method comprises the following steps: preheating a mould, hanging a heat insulation coating, controlling the components and superheat degree of molten metal to be cast, casting when the rotating speed of the mould reaches the standard, naturally cooling when the rotating speed of a centrifugal machine is zero, taking out a pipe blank, heating the pipe blank by a heating furnace, roughly rolling, trimming the pipe blank, and finish rolling. The invention adopts the centrifugal casting technology to help to eliminate gas and impurities in liquid metal, can obtain metal materials with high purity and high isometric crystal rate, thoroughly solves the problem of the defects left by producing metal plates by continuous casting billets and ingot casting, can prepare the metal plates with excellent performance, is simple and easy to operate, can save material consumption, and reduces processing time and processing cost.
Description
Technical Field
The invention belongs to the field of steel smelting, and particularly relates to a method for preparing a metal plate by centrifugal casting.
Background
Centrifugal casting is a technique and method for filling a casting mold with molten metal by injecting the molten metal into the mold rotating at a high speed and causing the molten metal to move centrifugally to fill the mold and form a casting. The centrifugal motion causes the liquid metal to fill the mould well in the radial direction and form a free surface of the casting, which facilitates the removal of gas and inclusions from the liquid metal, which affects the crystallization process of the metal, thereby improving the mechanical and physical properties of the casting. The centrifugal casting has the characteristics of wide application, low cost and high efficiency, solves the problem that the seamless steel pipe cannot produce a thick-wall steel pipe, can cast a hollow cylindrical shape and cast steel pipes with different diameters, wall thicknesses and lengths without sand cores compared with other casting process methods, and has the advantages of high production efficiency and low cost. The centrifugally cast steel pipe is widely applied to manufacturing of various equipment, and the cost of the equipment can be reduced, such as roller beds of transmission systems of steel tapping machines, steel pushing machines, steel loading machines and the like in the metallurgical industry.
The current methods for producing metal plates mainly include the following two methods: one method is that a continuous casting billet is prepared through a continuous casting machine, and then the continuous casting billet is rolled through a rolling mill to prepare a qualified metal plate; another method is to cast a metal ingot by a die casting process and then roll the metal ingot by rolling to prepare a metal plate. The casting blank in the above technology, whether continuous casting or die casting, inevitably exists as follows: the defects of component segregation of the casting blank, overproof inclusions of the casting blank and the like cannot be eliminated in the rolling process, so that the performance of the metal plate is unstable, and the quality cannot meet the requirement.
The centrifugal casting technology is beneficial to removing gas and impurities in liquid metal, and metal materials with high purity and isometric crystal rate can be obtained, but the centrifugal casting is mainly applied to preparing pipe products, and the technology for preparing metal plates is still to be developed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for preparing a metal plate by centrifugal casting. The method can be used for preparing the metal plate with excellent performance, and thoroughly solves the problems of poor performance of the metal plate caused by component segregation, low equiaxed crystal rate and high inclusion content caused by a continuous casting or ingot casting process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing a metal plate by centrifugal casting specifically comprises the following steps:
(1) the mold was preheated to 600-800 ℃.
(2) And (3) hanging the heat insulation coating, pouring resin coated sand along the rotating pipe die, and uniformly hanging the resin coated sand on the working surface of the pipe die by 5-8 mm.
(3) The components of the molten metal to be cast are controlled within a required range, and the superheat degree of the molten metal is controlled between 30 and 120 ℃.
(4) The rotating speed of the mould reaches 600 plus 1000 revolutions per minute, the metal liquid is poured into the mould through a launder, one metal liquid can be poured, and 2 or more than 2 metal liquids can be poured to prepare the composite metal plate. Argon is introduced into the mold in the casting process to protect the metal surface from oxidation. And adding a release agent to the inner wall of the tube blank after the molten metal pouring is finished. The centrifugal casting process may water cool the mold.
(5) When the rotating speed of the centrifuge is zero, and then the centrifuge is naturally cooled to 1000-400 ℃, the mold is disassembled, and the tube blank is taken out.
(6) The tube blank is processed according to the biting condition of a rolling mill, for a casting with the outer diameter of the tube blank being more than or equal to 250mm, the tube blank is flattened by a press until the rolling mill can bite, and for the tube blank with the tube diameter being less than 250mm, the tube blank can be directly rolled without processing.
(7) Heating the tube blank by the heating furnace at the temperature of 700 ℃ and 1300 ℃, and roughly rolling the tube blank by the rolling mill until the tube blank is leveled.
(8) And trimming the rolled and flattened tube blank, wherein the trimming amount of two sides is determined according to the thickness of the tube blank, and the two layers of steel plates after trimming are ensured not to be connected with metal. Because a certain amount of separant exists in the two steel plates, the two steel plates can be separated.
(9) And (3) performing finish rolling on the separated steel plate, and performing heating or non-heating treatment according to actual needs before finish rolling to finally obtain the steel plate with excellent performance.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the centrifugal casting technology to help to eliminate gas and impurities in liquid metal, can obtain metal materials with high purity and high isometric crystal rate, thoroughly solves the problem of the defects left by producing metal plates by continuous casting billets and ingot casting, can prepare the metal plates with excellent performance, is simple and easy to operate, can save material consumption, and reduces processing time and processing cost.
Detailed Description
The following further illustrates embodiments of the invention, but is not intended to limit the scope thereof:
a method for preparing a metal plate by centrifugal casting specifically comprises the following steps:
(1) preheating a mould to 600-800 ℃;
(2) and (3) hanging the heat insulation coating, pouring resin coated sand along the rotating pipe die, and uniformly hanging the resin coated sand on the working surface of the pipe die by 5-8 mm.
(3) The components of the molten metal to be cast are controlled within a required range, and the superheat degree of the molten metal is controlled between 30 and 120 ℃.
(4) The rotating speed of the mould reaches 600 plus 1000 revolutions per minute, the metal liquid is poured into the mould through a launder, one metal liquid can be poured, and 2 or more than 2 metal liquids can be poured to prepare the composite metal plate. Argon is introduced into the mold in the casting process to protect the metal surface from oxidation. And adding a release agent to the inner wall of the tube blank after the molten metal pouring is finished. The centrifugal casting process may water cool the mold.
(5) When the rotating speed of the centrifuge is zero, and then the centrifuge is naturally cooled to 1000-400 ℃, the mold is disassembled, and the tube blank is taken out.
(6) The tube blank is processed according to the biting condition of a rolling mill, for a casting with the outer diameter of the tube blank being more than or equal to 250mm, the tube blank is flattened by a press until the rolling mill can bite, and for the tube blank with the tube diameter being less than 250mm, the tube blank can be directly rolled without processing.
(7) Heating the tube blank by the heating furnace at the temperature of 700 ℃ and 1300 ℃, and roughly rolling the tube blank by the rolling mill until the tube blank is leveled.
(8) And trimming the rolled and flattened tube blank, wherein the trimming amount of two sides is determined according to the thickness of the tube blank, and the two layers of steel plates after trimming are ensured not to be connected with metal. Because a certain amount of separant exists in the two steel plates, the two steel plates can be separated.
(9) And (3) performing finish rolling on the separated steel plate, and performing heating or non-heating treatment according to actual needs before finish rolling to finally obtain the steel plate with excellent performance.
The following is a detailed description of the embodiments of the present invention by referring to 2 examples, which are shown below:
example 1:
preparing a low-carbon steel plate:
the molten steel comprises the following target chemical components: the weight percentages of the elements are as follows: 0.09% of C, 0.20% of Si, 0.30% of Mn, 0.020% of S and 0.020% of P, and Fe and a small amount of impurity elements;
(1) preheating a mould to 650 ℃;
(2) and (3) hanging the heat insulation coating, pouring resin coated sand along the rotating pipe die, and uniformly hanging the resin coated sand on the working surface of the pipe die by 7 mm.
(3) Controlling the components of the molten steel to be cast within a required range, and controlling the superheat degree of the molten steel at 110 ℃.
(4) When the rotating speed of the mould reaches 800 rpm, casting is carried out, and molten steel is poured into the mould through a launder. Argon is introduced into the mold in the casting process to protect the molten steel surface from being oxidized. The casting process sprays water to cool the mold. And adding a release agent to the inner wall of the tube blank after the molten metal pouring is finished.
(5) When the rotating speed of the centrifuge is zero, and then the centrifuge is naturally cooled to 910 ℃, the die is disassembled, and the tube blank is taken out.
(6) The outer diameter of the tube blank is 500mm, the wall thickness is 50mm, the tube blank is flattened by a press, the pressing thickness is 150mm, and the rolling mill can bite into the tube blank.
(7) The heating furnace heats the tube blank at 1200 ℃, and the tube blank is roughly rolled by the rolling mill until the tube blank is leveled.
(8) And (3) trimming the rolled and flattened tube blank, wherein the trimming amount of two sides is 60mm, the two layers of steel plates are not connected by metal after trimming, and the two steel plates are separated.
(9) And (3) performing finish rolling on the separated steel plate, and heating to 1150 ℃ before finish rolling to finally obtain the steel plate with excellent performance.
Example 2:
preparing a low-carbon steel and stainless steel composite board:
the low-carbon steel comprises the following target chemical components: the weight percentages of the elements are as follows: 0.12% of C, 0.34% of Si, 0.85% of Mn, 0.004% of S and 0.006% of P, which are Fe and a small amount of impurity elements.
The stainless steel comprises the following target chemical components: the weight percentages of the elements are as follows: 0.06% of C, 0.35% of Si, 1.1% of Mn, 0.010% of S, 0.020% of P, 18.5% of Cr, and 8.5% of Ni, which are Fe and a small amount of impurity elements.
(1) The mold was preheated to 700 ℃.
(2) And (3) hanging the heat insulation coating, pouring resin coated sand along the rotating pipe die, and uniformly hanging the resin coated sand on the working surface of the pipe die by 5 mm.
(3) The components of the molten steel to be cast are controlled within a required range, the superheat degree of low-carbon steel is controlled at 100 ℃, and the superheat degree of stainless steel is controlled at 50 ℃.
(4) The rotating speed of the mould reaches 900 revolutions per minute, and the low-carbon molten steel is poured into the mould through a launder. Argon is introduced into the mold in the casting process to protect the metal surface from oxidation. And pouring stainless steel after the low-carbon steel is poured, and continuously introducing argon for protection. And adding a release agent to the inner wall of the tube blank after the molten metal pouring is finished.
(5) When the rotating speed of the centrifuge is zero, and then the centrifuge is naturally cooled to 500 ℃, the die is disassembled, and the tube blank is taken out.
(6) The outer diameter of the tube blank is 200mm, the wall thickness is 40mm, and the tube blank can be directly bitten by a rolling mill, so that the tube blank is not required to be flattened by a press.
(7) The heating furnace heats the pipe blank at the temperature of 1100 ℃, and the pipe blank is roughly rolled by the rolling mill until the pipe blank is leveled.
(8) And (3) trimming the rolled and flattened tube blank, wherein the trimming amount of two sides is 45mm, the two layers of steel plates are not connected by metal after trimming, and the two steel plates are separated.
(9) And (3) performing finish rolling on the separated steel plate, heating to 1100 ℃ before finish rolling, and finally obtaining the composite steel plate with excellent performance.
The invention adopts the centrifugal casting technology to help to eliminate gas and impurities in liquid metal, can obtain metal materials with high purity and high isometric crystal rate, thoroughly solves the problem of the defects left by producing metal plates by continuous casting billets and ingot casting, can prepare the metal plates with excellent performance, is simple and easy to operate, can save material consumption, and reduces processing time and processing cost.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A method for preparing a metal plate by centrifugal casting is characterized by comprising the following steps:
1) preheating a mould; the preheating temperature of the die is 600-800 ℃;
2) hanging heat insulation coating, namely uniformly hanging the heat insulation coating on the working surface of the pipe die; the heat insulation coating is resin coated sand, the resin coated sand is poured along a rotating pipe die, and the thickness of the resin coated sand uniformly hung on the working surface of the pipe die is 5-8 mm;
3) controlling the components of the molten metal to be cast within a required range, and controlling the superheat degree of the molten metal to be cast within 30-120 ℃;
4) casting when the rotating speed of the mold reaches the standard, pouring molten metal into the mold, introducing protective gas into the mold in the pouring process to prevent the surface of the metal from being oxidized, and adding a separant to the inner wall of the tube blank after the molten metal is poured; the rotating speed of the die reaches the standard of 600-1000 revolutions per minute, and one or more than 2 metal liquids are poured during metal liquid pouring;
5) when the rotating speed of the centrifugal machine is zero, naturally cooling at the natural cooling temperature of 1000-400 ℃, disassembling the die and taking out the tube blank;
6) processing the pipe blank according to the biting condition of a rolling mill, flattening the pipe blank until the rolling mill can bite the pipe blank of a casting with the outer diameter of the pipe blank being more than or equal to 250mm by adopting a press machine, and directly rolling the pipe blank with the outer diameter of the pipe blank being less than 250mm without processing;
7) heating the tube blank at 700-1300 ℃, and roughly rolling the tube blank until the tube blank is leveled;
8) trimming the rolled and flattened tube blank, determining the cutting amount of two sides according to the thickness of the tube blank, ensuring that two layers of steel plates are not in metal connection after trimming, and separating the two steel plates;
9) and (4) performing finish rolling on the separated steel plate to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932672.9A CN110756587B (en) | 2019-09-29 | 2019-09-29 | Method for preparing metal plate by centrifugal casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932672.9A CN110756587B (en) | 2019-09-29 | 2019-09-29 | Method for preparing metal plate by centrifugal casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110756587A CN110756587A (en) | 2020-02-07 |
| CN110756587B true CN110756587B (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910932672.9A Active CN110756587B (en) | 2019-09-29 | 2019-09-29 | Method for preparing metal plate by centrifugal casting |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09216047A (en) * | 1996-02-09 | 1997-08-19 | Kubota Corp | Manufacture of complex plate material |
| CN101985679A (en) * | 2010-11-11 | 2011-03-16 | 北京科技大学 | Short production process for high-silicon steel plate |
| CN103042367A (en) * | 2013-01-28 | 2013-04-17 | 新兴铸管股份有限公司 | Production method of metallurgical composite channel steel |
| CN103357836A (en) * | 2013-07-22 | 2013-10-23 | 新兴铸管股份有限公司 | Production method of alloy plate |
| CN107030113A (en) * | 2017-04-21 | 2017-08-11 | 孙学贤 | Large diameter steel pipe continuous casting and tandem rolling production method, composite steel tube continuous casting and tandem rolling production method, clad steel plate continuous casting and tandem rolling production method |
| CN109365553A (en) * | 2018-10-10 | 2019-02-22 | 鞍钢股份有限公司 | Protective separating agent for high-nickel steel wide and thin plate pack rolling and pack rolling method |
-
2019
- 2019-09-29 CN CN201910932672.9A patent/CN110756587B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09216047A (en) * | 1996-02-09 | 1997-08-19 | Kubota Corp | Manufacture of complex plate material |
| CN101985679A (en) * | 2010-11-11 | 2011-03-16 | 北京科技大学 | Short production process for high-silicon steel plate |
| CN103042367A (en) * | 2013-01-28 | 2013-04-17 | 新兴铸管股份有限公司 | Production method of metallurgical composite channel steel |
| CN103357836A (en) * | 2013-07-22 | 2013-10-23 | 新兴铸管股份有限公司 | Production method of alloy plate |
| CN107030113A (en) * | 2017-04-21 | 2017-08-11 | 孙学贤 | Large diameter steel pipe continuous casting and tandem rolling production method, composite steel tube continuous casting and tandem rolling production method, clad steel plate continuous casting and tandem rolling production method |
| CN109365553A (en) * | 2018-10-10 | 2019-02-22 | 鞍钢股份有限公司 | Protective separating agent for high-nickel steel wide and thin plate pack rolling and pack rolling method |
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| CN110756587A (en) | 2020-02-07 |
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