JPS63119948A - Continuous casting method for steel containing silicon - Google Patents
Continuous casting method for steel containing siliconInfo
- Publication number
- JPS63119948A JPS63119948A JP26708186A JP26708186A JPS63119948A JP S63119948 A JPS63119948 A JP S63119948A JP 26708186 A JP26708186 A JP 26708186A JP 26708186 A JP26708186 A JP 26708186A JP S63119948 A JPS63119948 A JP S63119948A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- continuous casting
- mold
- steel
- steel containing
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000009749 continuous casting Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 9
- 239000010703 silicon Substances 0.000 title claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 abstract description 11
- 238000003756 stirring Methods 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 2
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、４乃至７重量％のシリコン（Ｓ ｉ ）を
含有し、熱間脆化しやすく圧延しにくい高３ｉ鋼を連続
鋳造する方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for continuously casting high 3i steel containing 4 to 7% by weight of silicon (S i ), which is susceptible to hot embrittlement and difficult to roll. .
［従来の技術］
Ｓ１含有歴が４乃至７重層％（以下、単に％と略す）で
、炭素（Ｃ）含有日が低い低Ｃ高Ｓｉｍは、鋳片の表面
近傍から中心部に向けて一方向凝固となるので、極めて
長い結晶となる等、凝固過程で粗大結晶粒を形成しやす
い。このため、この鋼種は、熱間で脆化し、連続鋳造時
の微小の外的付加歪み（熱応力、バルジング応力又は矯
正力等による歪み）により、鋳片の表面及び内部に粒界
割れが発生しやすい。また、熱間圧延時に、圧延外力を
受けて鋳片に粒界割れが発生することがある。[Prior art] Low C high Sim with an S1 content history of 4 to 7% (hereinafter simply abbreviated as %) and a low carbon (C) content history is produced from near the surface of the slab to the center. Since directional solidification occurs, coarse crystal grains such as extremely long crystals are likely to be formed during the solidification process. For this reason, this steel type becomes brittle in hot conditions, and intergranular cracks occur on the surface and inside of the slab due to minute externally added strains (strains due to thermal stress, bulging stress, or straightening force, etc.) during continuous casting. It's easy to do. Further, during hot rolling, intergranular cracks may occur in the slab due to external rolling force.
この発明は、かかる事情に鑑みてなされたものであって
、熱間脆化じやすく圧延しにくい高３ｉ鋼を、その結晶
粒を微細化して連続鋳造することができ、割れの発生を
回避することができるシリコンを含有する鋼の連Ｍ鋳造
圧延方法を提供することを目的とする。This invention was made in view of the above circumstances, and it is possible to continuously cast high 3i steel, which is susceptible to hot embrittlement and difficult to roll, by refining its crystal grains, thereby avoiding the occurrence of cracks. An object of the present invention is to provide a continuous M casting and rolling method for steel containing silicon.
［問題点を解決するための手段］
この発明に係るシリコンを含有する鋼の連続鋳造方法は
、４乃至７重量％のシリコンを含有する鋼を連続鋳造磯
で連続鋳造する方法において、鋳型内の溶鋼の過熱度を
１０℃以下にすると共に、この溶鋼を電ＩａＷ！拌し、
鋳片の表層部の結晶粒径を６ｎｍ以下にすることを特徴
とする特［作用］
この発明によれば、鋳型内に注入された溶鋼は、その過
熱度が１０℃以下である。このため、柱状易化が抑制さ
れる。これに加えて、溶鋼は鋳型内でｉｆ磁ＷＩｋ拌さ
れる。従って、鋳片の表面近傍の溶鋼が鋳型により冷却
されて凝固する際に、溶鋼は攪拌されつつ凝固するので
、結晶粒の粗大化が阻止され、微細結晶粒の鋳片が得ら
れる。このため、凝固冷却過程及び圧延力が印加された
場合の粒界割れの発生が回避される。[Means for Solving the Problems] The continuous casting method for steel containing silicon according to the present invention is a method for continuously casting steel containing 4 to 7% by weight of silicon in a continuous casting iron. In addition to reducing the degree of superheating of molten steel to 10°C or less, this molten steel can be heated to electric power IaW! Stir and
Features characterized by reducing the grain size of the surface layer of the slab to 6 nm or less According to the present invention, the degree of superheat of the molten steel poured into the mold is 10° C. or less. For this reason, columnar facilitation is suppressed. In addition to this, the molten steel is magnetically stirred within the mold. Therefore, when the molten steel near the surface of the slab is cooled and solidified by the mold, the molten steel is solidified while being stirred, so coarsening of crystal grains is prevented, and a slab with fine crystal grains is obtained. Therefore, generation of intergranular cracks during the solidification cooling process and when rolling force is applied is avoided.
［実施例］
以下、この発明の実施例について具体的に説明する。連
続鋳造機の鋳型内に注入された溶鋼の温度をその凝固温
度よりも１０℃高い温度以下の温度にする。つまり、鋳
型内の溶鋼過熱度（溶鋼温度と溶鋼の凝固温度との差）
が１０℃以下の低温鋳造を行う。そして、鋳型に鋳型内
の溶鋼を攪拌する電磁攪拌装置を設置し、鋳型内で凝固
しつつある溶鋼を電磁攪拌して静置状態で溶鋼が凝固す
ることを阻止する。これにより、鋳片の表層部の結晶粒
径を（Ｉｌｌにする。この攪拌方法は、例えば、攪拌に
より、水平方向に鋳型壁に沿って対向する流動、水平方
向の同一方向の流動、一定の周期で反転する流動、若し
くは定常流、又は垂直方向のこれらの流動等が得られる
ようなものがある。[Examples] Examples of the present invention will be specifically described below. The temperature of molten steel injected into the mold of a continuous casting machine is set to a temperature 10° C. higher than its solidification temperature or less. In other words, the degree of superheating of molten steel in the mold (the difference between the molten steel temperature and the solidification temperature of molten steel)
Casting is performed at a low temperature of 10°C or less. Then, an electromagnetic stirring device for stirring the molten steel in the mold is installed in the mold, and the molten steel that is solidifying in the mold is electromagnetically stirred to prevent the molten steel from solidifying in a stationary state. As a result, the crystal grain size in the surface layer of the slab is set to There are methods that can obtain periodically reversed flow, steady flow, or vertical flow.
このようにして低温鋳造すると共に、鋳型内で電磁攪拌
しつつ連続鋳造することにより、鋳片の表層部の凝固結
晶粒径を微細化することができる。By performing low-temperature casting in this manner and continuous casting while electromagnetically stirring in the mold, it is possible to refine the solidified crystal grain size in the surface layer of the slab.
従って、連続鋳造時の鋳片の表面疵の発生は回避される
と共に、この鋳片を圧延しても割れの発生は防止される
。Therefore, the occurrence of surface flaws on the slab during continuous casting is avoided, and even when this slab is rolled, the generation of cracks is prevented.
例えば、空芯時の磁束密度を５００ガウス、周波数を３
Ｈｚとして、鋳型内の溶鋼に水平方向の対向流を定常的
に発生させ、鋳型における溶鋼過熱度を１０℃にしたと
ころ、鋳片の表層直下から軸心部に至るまで、６■以下
の等軸晶組織が形成された。For example, the magnetic flux density at the air core is 500 Gauss, and the frequency is 3.
When the molten steel in the mold was constantly generated with a countercurrent horizontal flow and the molten steel superheated in the mold was set to 10°C, the molten steel in the mold was heated to 10°C. An axial crystal structure was formed.
［発明の効果］
この発明によれば、低温鋳造しつつ、鋳型内で溶鋼を電
磁攪拌するから、鋳片の表層部から内部にかけて結晶粒
径を微細にすることができる。従って、連続鋳造から熱
間圧延の全ての工程において、割れの発生を回避するこ
とができる。[Effects of the Invention] According to the present invention, since the molten steel is electromagnetically stirred in the mold while being cast at a low temperature, the crystal grain size can be made fine from the surface layer to the inside of the slab. Therefore, generation of cracks can be avoided in all steps from continuous casting to hot rolling.
Claims (1)
連続鋳造する方法において、鋳型内の溶鋼の過熱度を１
０℃以下にすると共に、この溶鋼を電磁攪拌し、鋳片の
表層部の結晶粒径を６ｍｍ以下にすることを特徴とする
シリコンを含有する鋼の連続鋳造方法。In a method of continuously casting steel containing 4 to 7% by weight of silicon using a continuous casting machine, the degree of superheating of molten steel in the mold is reduced to 1.
A continuous casting method for silicon-containing steel, characterized in that the temperature is lower than 0°C, and the molten steel is electromagnetically stirred to reduce the grain size of the surface layer of the slab to 6 mm or lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26708186A JPS63119948A (en) | 1986-11-10 | 1986-11-10 | Continuous casting method for steel containing silicon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26708186A JPS63119948A (en) | 1986-11-10 | 1986-11-10 | Continuous casting method for steel containing silicon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63119948A true JPS63119948A (en) | 1988-05-24 |
Family
ID=17439767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26708186A Pending JPS63119948A (en) | 1986-11-10 | 1986-11-10 | Continuous casting method for steel containing silicon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63119948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393185A (en) * | 2022-01-27 | 2022-04-26 | 马鞍山钢铁股份有限公司 | Method for improving isometric crystal rate of non-oriented electrical steel casting blank at high continuous casting speed |
-
1986
- 1986-11-10 JP JP26708186A patent/JPS63119948A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393185A (en) * | 2022-01-27 | 2022-04-26 | 马鞍山钢铁股份有限公司 | Method for improving isometric crystal rate of non-oriented electrical steel casting blank at high continuous casting speed |
| CN114393185B (en) * | 2022-01-27 | 2023-08-15 | 马鞍山钢铁股份有限公司 | Method for improving equiaxial crystal rate of non-oriented electrical steel casting blank at high continuous casting speed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102528002A (en) | Process and device for high-temperature alloy fine-grain casting with composite electromagnetic fields | |
| WO1995007780A1 (en) | Method of manufacturing thin cast piece through continuous casting | |
| CN108526424B (en) | Magnetic field generator of dual-frenquency electromagnetic stirring | |
| CN113688470A (en) | Design method of continuous casting crystallizer copper plate for improving electromagnetic stirring efficiency | |
| JPS63119948A (en) | Continuous casting method for steel containing silicon | |
| CN108326263B (en) | Alloy casting ultra-strong traveling wave magnetic field continuous treatment directional solidification method | |
| JPH0375312A (en) | Method for soaking bearing steel | |
| CN109518065B (en) | Preparation method of large-size special-shaped aluminum-nickel-cobalt magnet for brushless exciter | |
| JPS63119949A (en) | Continuous casting method for steel containing silicon | |
| JPS63119950A (en) | Continuous casting method for steel containing silicon | |
| JPH0832927B2 (en) | Manufacturing method of non-oriented electrical steel sheet with high magnetic flux density | |
| KR100349148B1 (en) | A method for manufacturing wire roe for high silicon spring having high strength | |
| KR100538057B1 (en) | Casting mold for large stainless steel ingot casting | |
| JPS63115654A (en) | Method and apparatus for casting metal sheet | |
| CN109136787B (en) | Iron-based amorphous strip and preparation method thereof | |
| JP3342777B2 (en) | Silicon steel casting method | |
| Wu et al. | Microstructure and texture evolution of strip-cast and hot-rolled Fe-3% Si steel sheet | |
| CN108950435B (en) | Iron-based amorphous strip with high saturation magnetic induction and preparation method thereof | |
| JP3161293B2 (en) | Continuous casting method | |
| CN205650804U (en) | Package stabilizing support in middle of rapid hardening stove with shield plate | |
| JPS61189846A (en) | Manufacture of metallic sheet | |
| LI et al. | Effect of Y on the Solidification Microstructure, Warm Compression Behavior, and Softening Mechanism of Non-Oriented 6.5% Si Electrical Steel | |
| JPH04274843A (en) | Production of cast billet of high si content steel free from edge crack | |
| JP2548942B2 (en) | Method for preventing cracking during rapid solidification of Fe-Ni based alloy | |
| CN117385294A (en) | High-quality plastic die steel and preparation method thereof |