WO2016039505A1 - Procédé de fabrication de tôle d'acier électrique ayant une texture goss par laminage asymétrique - Google Patents

Procédé de fabrication de tôle d'acier électrique ayant une texture goss par laminage asymétrique Download PDF

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Publication number
WO2016039505A1
WO2016039505A1 PCT/KR2014/012047 KR2014012047W WO2016039505A1 WO 2016039505 A1 WO2016039505 A1 WO 2016039505A1 KR 2014012047 W KR2014012047 W KR 2014012047W WO 2016039505 A1 WO2016039505 A1 WO 2016039505A1
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Prior art keywords
texture
steel sheet
rolling
specimen
goss
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PCT/KR2014/012047
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English (en)
Korean (ko)
Inventor
이동녕
김광희
남수권
김인수
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금오공과대학교 산학협력단
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Priority claimed from KR1020140119925A external-priority patent/KR101594393B1/ko
Application filed by 금오공과대학교 산학협력단 filed Critical 금오공과대학교 산학협력단
Publication of WO2016039505A1 publication Critical patent/WO2016039505A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Definitions

  • the present invention relates to a method for producing an electrical steel sheet having a GOSS texture in iron, iron-based alloys, Si-containing steel sheet, and more specifically, a high temperature for a long time at room temperature or hot asymmetric rolling process with a speed ratio of upper and lower rolls of 1: 1.5. It relates to a method for producing electrical steel sheet that can obtain GOSS texture without undergoing heat treatment.
  • the grain structure of the grain-oriented electrical steel sheet consists of so-called Goss grain structure composed of grains composed of ⁇ 110 ⁇ planes parallel to the steel plate surface and ⁇ 001> directions parallel to the rolling direction. Soft magnetic material with excellent magnetic properties.
  • This oriented electrical steel sheet is superior to the secondary recrystallization structure obtained by inhibiting the growth of the primary recrystallized grains in the final annealing process after the primary recrystallization and selectively growing the grains of the ⁇ 110 ⁇ ⁇ 001> azimuth among the grains whose growth is suppressed. It is to show magnetic characteristics.
  • the steel used as the transformer core material is Fe-3 ⁇ 4% Si oriented electrical steel sheet (also called silicon steel sheet).
  • N. P. Goss N. P. Goss, 1934. July. 3, US patent, no. 1,965,559 and N. P.
  • Goss, 1934, Trans. ASM, Vol. 23, p. 511) shows a ⁇ 110 ⁇ ⁇ 001> texture (also called Goss texture), an aggregate structure with a [100] orientation showing good magnetic properties in Fe-3 ⁇ 4% Si oriented electrical steel sheets in steel.
  • the method of preparation was devised.
  • Sung Jin-Kyung Sung Jin-Kyung, 2009, Korean Patent Publication No. 2009-0082006
  • the present invention is to solve the problems as described above, the object of the present invention is to go through the asymmetrical rolling process at room temperature or hot and the Goss texture ( ⁇ 110 ⁇ ⁇ 001> gathering structure) can be obtained, as well as providing a method for manufacturing electrical steel sheet in which the Goss texture can be well developed with increasing the reduction ratio.
  • Still another object of the present invention is to provide a method for manufacturing an electrical steel sheet which can be heat treated at an appropriate time ratio according to temperature in an air atmosphere.
  • the present invention is a Goss texture ( ⁇ 110 ⁇ ⁇ 001) characterized in that the iron and iron alloy, Si-containing steel sheet undergoes an asymmetrical rolling process at room temperature or hot
  • the present invention relates to a method for manufacturing an electrical steel sheet having a collective structure).
  • the room temperature or hot rolling of the iron and iron-based alloy, Si-containing steel sheet according to the present invention is characterized in that the asymmetrical rolling process in which the ratio of the upper and lower rolls is 1: 1.5, the asymmetrical rolling process has a total rolling reduction of 50% or more It is preferable to
  • the heat treatment process after the asymmetrical rolling process is heat treatment at 180 °C or more in an air atmosphere and preferably heat treatment for 60 minutes to 10 hours at 180 ⁇ 220 °C, or for 3 to 5 hours at 380 ⁇ 420 °C,
  • the process may be 5 to 60 minutes at 750-770 ° C., 3 to 60 minutes at 850-950 ° C., or 8 to 12 minutes at 1150-1250 ° C.
  • Asymmetrical rolling of the Si-containing steel sheet according to the present invention is preferably hot asymmetrical rolling after intermediate heating at 650 ⁇ 800 °C for 5 to 10 minutes, or by cooling after intermediate heating at 700 ⁇ 800 °C for 5 to 10 minutes at room temperature. .
  • the present invention provides a method for manufacturing an electrical steel sheet which can obtain Goss texture without undergoing a long heat treatment at high temperature through asymmetrical rolling at room temperature or hot with a speed ratio of upper and lower rolls of 1: 1.5. do.
  • the heat treatment in the air instead of heat treatment in an atmosphere of reducing or blocking the existing oxygen can be economical in terms of manufacturing process.
  • Roll rolling roll mounted to the rolling mill during asymmetrical rolling according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of a specimen used in the manufacture of X-ray diffraction specimens in order to examine the change in the texture according to the thickness layer of the asymmetrically rolled steel sheet according to an embodiment of the present invention
  • Figure 3a and Figure 3b is a structural diagram showing the texture by using the azimuth distribution function of the specimen before and after heat treatment and asymmetrical rolling of the steel A steel sheet according to an embodiment of the present invention
  • FIG. 4 is a structural diagram showing an aggregate structure using the azimuth distribution function before and after asymmetrical rolling of steel B steel sheet according to an embodiment of the present invention
  • FIG. 5 is a structural diagram showing an aggregate structure using the azimuth distribution function before and after asymmetrical rolling of steel C steel sheet according to an embodiment of the present invention
  • FIG. 6 is a structural diagram showing an aggregate structure using the azimuth distribution function before and after asymmetrical rolling of steel D steel sheet according to an embodiment of the present invention
  • FIG. 7A and 7B are organization charts showing textures using azimuth distribution functions before and after asymmetrical rolling of a steel E steel sheet according to an embodiment of the present invention.
  • Figure 8 is a structure diagram showing the texture by using the azimuth distribution function before and after asymmetrical rolling of the steel F steel sheet according to an embodiment of the present invention.
  • R ' is the roll radius
  • V1 and V2 are the rotational speed of the upper and lower rolls, respectively.
  • Asymmetrical rolling refers to rolling in a state where the rotational speed of the upper and lower rolls is different, that is, V1 ⁇ V2 or V1> V2.
  • Figure 2 is a cross-sectional view showing the specimen used in the fabrication of X-ray diffraction specimens in order to examine the change in the texture according to the thickness layer of the asymmetrically rolled steel sheet.
  • S 2d / t
  • 3A to 8 show the textures changed at each point of the steel sheet, each of which shows different textures according to the reduction ratio and heat treatment.
  • 3a to 8 shows Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) when six kinds of iron and iron alloys and Si-containing steel sheets (steel A, B, C, D, E, and F) are heat treated with asymmetrical rolling. It is an organization chart showing a change of, and for reference, the components of the iron and iron-based alloys, Si-containing steel sheet is shown in Table 1 below.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is used by using iron and iron-based alloys and Si-containing steel sheets in the present invention, from ultra-low carbon steel to low carbon steel and Si-containing steel sheet.
  • the obtaining method will be described with reference to FIGS. 3A to 8.
  • 3A and 3B are organizational charts showing the texture by using the azimuth distribution function of the specimens heat-treated before and after room temperature asymmetrical rolling of the steel A steel sheet according to an embodiment of the present invention.
  • Figure 3a shows the azimuth distribution function of the initial specimen (the specimen before asymmetrical rolling) of the steel A steel sheet showing that the ⁇ 111 ⁇ ⁇ 110> and ⁇ 111 ⁇ ⁇ 112> texture are well developed
  • Figure 3b (e) shows the azimuth distribution function of the specimen after heat treatment at 200 ° C. for 60 minutes after asymmetrically rolling the initial specimen (the specimen before asymmetrical rolling) of the steel
  • a steel sheet 71% at room temperature ( ⁇ 110) ⁇ ⁇ 001> shows that the tissue is well developed.
  • (f) of Figure 3b shows the azimuth distribution function of the specimen after heat treatment at 200 ° C. for 10 hours after asymmetrically rolling the initial specimen (the specimen before asymmetrical rolling) of steel A steel sheet at 71% at room temperature.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is well developed.
  • FIG. 3b shows the azimuth distribution function of the specimen subjected to heat treatment at 900 ° C. for 60 minutes after asymmetrically rolling the initial specimen (the specimen before asymmetrical rolling) of the steel A steel sheet at 71% at room temperature. It shows that the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is well developed, and (h) shows that the initial specimen (the specimen before asymmetrical rolling) of steel A steel plate was asymmetrically rolled at 1200% after 1200%. It shows the azimuth distribution function of the specimen heat-treated at 10 °C for 10 minutes, showing higher strength than after asymmetrical rolling and showing that Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is well developed.
  • Figure 4 shows the texture by using the azimuth distribution function before and after the room temperature asymmetrical rolling of the steel B steel sheet according to an embodiment of the present invention
  • (a) is the orientation of the initial specimen (the specimen before asymmetric rolling) of the steel B steel sheet ⁇ 110 ⁇ ⁇ 110> and ⁇ 112 ⁇ ⁇ 111> as the distribution function
  • (b) shows the azimuth distribution of 50% of asymmetrically rolled initial specimen of steel B steel plate (the specimen before asymmetric rolling)
  • Functions show that the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is developing. Judging from this, it can be seen that Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) may develop even at about 50% of the room temperature asymmetric rolling reduction rate.
  • Figure 4 (c) shows the azimuth distribution function of the specimen obtained by rolling asymmetrically rolled 70% of the initial specimen (the specimen before asymmetrical rolling) of the steel B steel sheet Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture)
  • (D) shows the azimuth distribution function of the asymmetrically rolled specimen of 85% room temperature on the initial specimen (steel plate before asymmetrical rolling) of steel B steel plate ( ⁇ 110 ⁇ ⁇ 001). > Texture) The component is developing better.
  • FIG. 5 is a result of synthesizing the aggregate structure by using the azimuth distribution function before and after the room temperature asymmetric rolling of the steel C steel sheet according to an embodiment of the present invention
  • (a) is the initial specimen (steel plate before asymmetrical rolling) ⁇ 111 ⁇ ⁇ 110> and ⁇ 111 ⁇ ⁇ 112> are well developed specimens
  • (b) shows the initial specimen (the specimen before asymmetric rolling) of steel C steel sheet.
  • the azimuth distribution function of asymmetrically rolled specimens at% room temperature indicates that the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is developing.
  • (c) shows the azimuth distribution function of the specimen obtained by asymmetrically rolling the initial specimen (the specimen before asymmetric rolling) of the steel C steel sheet at 70% at room temperature.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) was well developed.
  • (D) shows the azimuth distribution function of the specimen obtained by asymmetrically rolling the initial specimen of the steel C steel plate (the specimen before asymmetrical rolling) by 85% at room temperature.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) It is well developed.
  • Figure 6 is a result of synthesizing the texture by using the azimuth distribution function before and after room temperature asymmetrical rolling of the steel D steel sheet according to an embodiment of the present invention.
  • FIG. 6 (a) shows the azimuth distribution function of the initial specimen (the specimen before asymmetrical rolling) of the steel D steel plate.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture), ⁇ 110 ⁇ ⁇ 112> and ⁇ 112 ⁇ ⁇ 111> shows the aggregate structure, and (b) shows the azimuth distribution function of the specimen in which the initial specimen (the specimen before asymmetrical rolling) of the steel C steel plate was asymmetrically rolled at 50% at room temperature.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> Tissue) shows that the component is developing.
  • (c) shows the azimuth distribution function of the specimen obtained by asymmetrically rolling 60% of the initial specimen (the specimen before asymmetric rolling) of the steel C steel plate, and the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) was well developed. It is showing.
  • ( b) shows the azimuth distribution function of 89% hot asymmetrically rolled specimens after heating the initial specimens of steel E steel sheet (the specimen before asymmetric rolling) at 750 °C for 5 minutes in the middle of asymmetric rolling.
  • Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture)
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) is well developed
  • (f) shows that the specimen of FIG. 7a (b) is heat treated at 900 ° C. for 60 minutes in an air atmosphere.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) of the specimen is well developed.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001 > Texture) shows a well developed state
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) of the specimen is well developed.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) of the specimen is well developed.
  • the Goss organization ( ⁇ 110 ⁇ ⁇ 001>) is well developed.
  • the Goss organization ( ⁇ 110 ⁇ ⁇ 001>) is well developed.
  • the Goss organization ( ⁇ 110 ⁇ ⁇ 001>) is well developed.
  • the Goss organization ( ⁇ 110 ⁇ ⁇ 001>) is well developed.
  • the Goss organization ( ⁇ 110 ⁇ ⁇ 001>) is well developed.
  • the Goss organization ( ⁇ 110 ⁇ ⁇ 001>) is well developed.
  • the Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) of the Psalms is well developed.
  • Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) can be obtained by asymmetrically rolling various kinds of iron, iron alloy, and Si-containing steel sheets at room temperature.
  • the total rolling reduction to obtain a well-developed Goss texture ( ⁇ 110 ⁇ ⁇ 001> texture) by asymmetrically rolling the steel sheet is 50% or more, and as the reduction ratio increases, the Goss texture ( ⁇ 110 ⁇ ⁇ 001> the tissues were better developed.
  • the Goss texture obtained by asymmetrical rolling ( ⁇ 110 ⁇ ⁇ 001> texture) can be heat treated at low temperature for a long time and can also be heat treated at high temperature for a short time.
  • the heat treatment process is a heat treatment for 60 minutes to 10 hours at 180 ⁇ 220 °C in an air atmosphere, a heat treatment for 3 to 5 hours at 380 ⁇ 420 °C, or a process for 5 to 60 minutes at 750 ⁇ 770 °C It may be used for 3 to 60 minutes at 850-950 ° C. In addition, it may be subjected to a short time course for 8 to 12 minutes at a high temperature of 1150 ⁇ 1250 °C.
  • This heat treatment process has the advantage that it is possible in the air atmosphere unlike the conventional.
  • the Si-containing steel sheet was heated at 650 ⁇ 800 °C for 5 ⁇ 10 minutes and hot asymmetrically rolled or at 700 ⁇ 800 °C for 5 ⁇ 10 minutes, then cooled to room temperature asymmetrically rolled ( ⁇ 110 ⁇ ⁇ 001> collective).
  • the present invention by using asymmetric rolling of various kinds of iron and iron alloys, Si-containing steel sheet at room temperature or hot asymmetric rolling or by heat treatment of the asymmetrically rolled specimens at low temperature for a short time instead of high temperature long time heat treatment in air atmosphere It shows how to get Goss organization ( ⁇ 110 ⁇ ⁇ 001> organization).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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Abstract

La présente invention concerne un procédé de fabrication d'une tôle d'acier électrique ayant une texture Goss (texture {110}<001>), les tôles d'acier contenant du fer, un alliage à base de fer, et du Si subissant un processus de laminage asymétrique à température ambiante ou à chaud. Grâce aux procédés de fabrication d'une tôle d'acier électrique utilisant le processus de laminage asymétrique, la présente invention a non seulement un effet tel qu'une texture Goss (texture {110}<001>) est obtenue par laminage de différents types de tôle d'acier à température ambiante ou à température élevée par l'intermédiaire d'un laminage asymétrique, et traitement thermique des tôles d'acier dans une atmosphère d'air à basse température pendant un temps court, plutôt qu'à température élevée pendant un temps long, mais également un effet économique en termes de processus de fabrication parce que les tôles d'acier peuvent être traitées thermiquement dans l'air, plutôt que dans une atmosphère à oxygène réduit ou bloqué comme dans un procédé de traitement thermique conventionnel.
PCT/KR2014/012047 2014-09-11 2014-12-09 Procédé de fabrication de tôle d'acier électrique ayant une texture goss par laminage asymétrique WO2016039505A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0119925 2014-09-11
KR1020140119925A KR101594393B1 (ko) 2013-09-11 2014-09-11 비대칭압연에 의한 goss 집합조직을 가지는 전기강판의 제조방법

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105750330A (zh) * 2016-03-31 2016-07-13 云南昆钢新型复合材料开发有限公司 一种非对称不锈钢复合坯热轧生产复合板的方法
CN105855292A (zh) * 2016-03-31 2016-08-17 云南昆钢新型复合材料开发有限公司 一种非对称耐磨钢复合坯热轧生产方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406715A (en) * 1980-04-26 1983-09-27 Nippon Steel Corporation Process for producing grain-oriented electromagnetic steel strip
US4437909A (en) * 1981-05-30 1984-03-20 Nippon Steel Corporation Process for producing a grain-oriented silicon steel sheet or strip having excellent magnetic properties
JPH08283845A (ja) * 1995-04-12 1996-10-29 Nippon Steel Corp 靱性の優れたＣｒ系ステンレス熱延鋼帯の製造方法
KR20090082006A (ko) * 2008-01-25 2009-07-29 성진경 이방향성 전기강판의 제조방법 및 이를 이용하여 제조된이방향성 전기강판
KR20140070697A (ko) * 2012-11-15 2014-06-11 영남대학교 산학협력단 이속압연 공정을 통한 고강도 페라이트강 판재의 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406715A (en) * 1980-04-26 1983-09-27 Nippon Steel Corporation Process for producing grain-oriented electromagnetic steel strip
US4437909A (en) * 1981-05-30 1984-03-20 Nippon Steel Corporation Process for producing a grain-oriented silicon steel sheet or strip having excellent magnetic properties
JPH08283845A (ja) * 1995-04-12 1996-10-29 Nippon Steel Corp 靱性の優れたＣｒ系ステンレス熱延鋼帯の製造方法
KR20090082006A (ko) * 2008-01-25 2009-07-29 성진경 이방향성 전기강판의 제조방법 및 이를 이용하여 제조된이방향성 전기강판
KR20140070697A (ko) * 2012-11-15 2014-06-11 영남대학교 산학협력단 이속압연 공정을 통한 고강도 페라이트강 판재의 제조방법

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105750330A (zh) * 2016-03-31 2016-07-13 云南昆钢新型复合材料开发有限公司 一种非对称不锈钢复合坯热轧生产复合板的方法
CN105855292A (zh) * 2016-03-31 2016-08-17 云南昆钢新型复合材料开发有限公司 一种非对称耐磨钢复合坯热轧生产方法
CN105855292B (zh) * 2016-03-31 2018-05-15 云南昆钢新型复合材料开发有限公司 一种用非对称耐磨钢复合坯热轧生产耐磨钢复合板卷的方法

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