WO2001087517A1 - Plaque ceramique pour deversoir lateral d'un appareil de coulee continue de type double rouleau - Google Patents
Plaque ceramique pour deversoir lateral d'un appareil de coulee continue de type double rouleau Download PDFInfo
- Publication number
- WO2001087517A1 WO2001087517A1 PCT/JP2001/004138 JP0104138W WO0187517A1 WO 2001087517 A1 WO2001087517 A1 WO 2001087517A1 JP 0104138 W JP0104138 W JP 0104138W WO 0187517 A1 WO0187517 A1 WO 0187517A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ceramic plate
- plate material
- less
- mass
- side weir
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/066—Side dams
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/583—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on boron nitride
Definitions
- the present invention relates to a twin-drum continuous manufacturing apparatus for continuously manufacturing pieces while generating solidified seals on the peripheral surfaces of a pair of cooling drums rotating in opposite directions to each other in parallel with each other.
- the present invention relates to a ceramic plate material used for a side weir constituting a sandwiching pool.
- the material used for the side dam that composes the basin section with the cooling drum sandwiched from both sides is heat resistant to withstand molten steel temperature of about 1600 ° C and withstands temperature difference of about 400 ° C.
- Characteristics such as thermal shock resistance, small thermal deformation (small thermal expansion coefficient), poor wettability with molten steel (good exfoliation of solidified material), and excellent wear resistance It is required as a basic characteristic (see Japanese Patent Application Laid-Open No. 62-166054).
- the side dam In the side dam, the part where the cooling drum and the molten steel are in contact with each other (the part on the molten steel side along the sliding surface of the cooling drum) is eroded.
- the side dam has excellent erosion resistance in addition to the basic characteristics. (See JP-A-7-68354).
- boron nitride As a ceramic plate material, boron nitride (BN) satisfies the above-mentioned required properties (heat resistance, thermal shock resistance, small thermal deformation, poor wettability with molten steel, etc.) in relatively large quantities. In addition, it does not crack during casting and is soft, so it easily fits into the drum end face at the beginning, and there is no clearance between the side dam and the drum end face, and there is no lug. Because of its advantages, it has been used primarily, albeit at a high cost.
- BN has a drawback that, due to its softness, it is worn by the cooling drum in a short time and cannot withstand long-time continuous production.
- BN is blended with other ceramics, for example, silicon nitride (Si 3 N 4 ) / aluminum nitride (A1N), to achieve the characteristics required for a side dam.
- Si 3 N 4 silicon nitride
- A1N aluminum nitride
- Japanese Patent Application Laid-Open No. 7-60411 discloses a ceramic plate material comprising BN: 30 to 50 wt%, Si 3 N 4 : 30 to 65 wt%, and A1N: 5 to 15 wt%.
- This plate material has the advantage of improving wear resistance of BN, which has excellent wear resistance and low thermal expansion, so that it can withstand long-time embedding and has a low cost.
- JP-A-7-68354 discloses a ceramic plate material comprising BN: 20 to 30 wt%, Si 3 N 4 : 55 to 77 wt%, and A1N: 3 to 15 wt%. This plate material also contains A1N: 3 to 15 wt% and has excellent erosion resistance.
- the side weir used for continuous production of molten stainless steel supports molten steel with a large specific gravity containing a large amount of several alloying components on both sides of the cooling drum for a long time. Therefore, it is necessary that not only the erosion resistance but also the basic characteristics be superior to those of conventional ceramic plate materials.
- the present invention provides a ceramic plate material for side dams having excellent properties, which is sufficient to enable continuous use of molten stainless steel for a long time in continuous production.
- the task (objective) is to do this.
- Ceramic plate material for side dam for continuous construction of molten stainless steel As described above, in addition to erosion resistance, excellent basic characteristics are required.
- the side weir is cooled at the point where it contacts the cooling drum, and this cooling may induce the formation and adhesion of metal, which may impair the stable operation of the continuous structure.
- the present invention provides a ceramic plate material containing BN, Si 3 N 4 , and A1N as a main component, in order to enhance the erosion resistance, so that the abrasion resistance is good and the erosion resistance is high.
- A1N higher content of A1N than conventional ceramic plate material (5-15wt%) It is.
- the present inventors changed the content of A1N, which is responsible for erosion resistance, in a ceramic plate material containing BN, Si 3 N 4 , and A1N as main components, thereby obtaining a linear wear index (melting resistance). (An index indicating the degree of sex).
- Figure 1 shows the results. The present inventor found from FIG. 1 that, as a side dam for continuous production of stainless steel molten steel, in order to secure desired erosion resistance, A1 with a content of 9% by mass or more in terms of A1 content was specifically described. Found that it was necessary to contain more than 15% by mass and less than 40% by mass of A1N.
- the inventor conducted intensive studies on the thermal conductivity and the wettability with molten steel used as indices in the present invention, and found that A1 with a content of 9% by mass or more in terms of A1 was found.
- the thermal conductivity must be 8 WZ (m ⁇ K) or less, and the wettability with molten steel (contact angle 0) should be 120 ° or more. It was found that it was necessary to be.
- the present invention is based on the above findings, and the gist is as follows.
- a ceramic plate containing 9% by mass or more of A1 in terms of A1 equivalent having a normal temperature bending strength of 120 MPa or more, a bending strength at 1000 ° C of 65 MPa or more, and a hardness (Hv) of 50 to 350, Fracture toughness at 1000 ° C (; 1 MPa ⁇ m 1/2 or more; thermal conductivity from room temperature to 1000 ° C is 8 WZ
- the ceramic plate material for twin-drum continuous side weirs according to (3) characterized in that it contains BN: 10% or more and less than 20% by mass%.
- the ceramic plate material for a double-drum continuous side dam according to (3) or (4), characterized in that it contains one or more of any one or more of not less than 15%.
- FIG. 1 is a diagram showing the relationship between the A1 equivalent content and the linear wear resistance index of a ceramic plate material containing BN, Si 3 N 4 , and A1N as main components.
- the ceramic plate material for a twin-drum type continuous side weir of the present invention (hereinafter referred to as “material of the present invention”) will be further described.
- the material of the present invention must contain A1 in an A1 equivalent content of 9% by mass or more.
- A1 is present in the ceramic plate material, this A1 reacts with the oxygen [O] in the molten steel, and alumina is deposited as a film on the plate surface.
- This alumina film acts as a protective film and contributes to erosion resistance.
- A1 equivalent content of 9% by mass or more is required. Must be contained. Therefore, the lower limit of the A1 equivalent content is set to 9% by mass.
- A1 equivalent is preferable.
- the content is 12.5% by mass or more, and the more preferable A1 content is 16% by mass or more.
- the A1 compound supplying A1 is preferably A1N, but in order to secure A1 of not less than 9% by mass in terms of A1, it is necessary to contain this A1N in excess of 15%. is there.
- A1N has good erosion resistance, it does not have very good thermal shock resistance. Therefore, if it is added in a large amount, the thermal shock resistance of the ceramic plate material is impaired. Therefore, the upper limit of A1N content is set to 40%.
- the preferable A1N content range for securing excellent erosion resistance and thermal shock resistance is more than 15 to 35%, and a more preferable content range is 17.5 to 27%. It is 5%.
- material its mechanical properties, room temperature flexural strength of more than 120 MPa, 1000 flexural strength in ° C or higher 65 MPa, hardness (Hv) is 50 to 350, is La, ⁇ of c broken in 1000 ° C Stipulates that l MPa 'm 1/2 or more.
- material favorable mechanical properties, cold bending strength than 150 MPa, 1000 ° C at a bending strength over 80 MPa, hardness (Hv) 1 00 to 200, fracture toughness K IC at 1000 ° C in There 1.5MPa ⁇ m 1/2 or more, a preferred mechanical properties is al, ambient temperature flexural strength than 200 MPa, 1000 ° C at a bending strength over Loompa, hardness (Hv) is 130 to 170, 1000 ° C Fracture toughness at 2 MPa 'm 1/2 or more.
- the thermal shock resistance index R ′ is an index indicating whether the thermal shock resistance is good or not, and at least SOOWZm is necessary to ensure excellent thermal shock resistance in the material of the present invention.
- the thermal properties are determined not only by the thermal shock resistance index but also by the thermal conductivity, and the proper range is defined. Even if it is good, if the thermal conductivity is high, the part in direct contact with the cooling drum is cooled by the cooling drum, and the metal is formed and adheres to that part, sometimes becoming huge. If the ground iron adhering to the side weir peels off at a certain beat and falls, as described above, hot hops ( ⁇ red-hot bands appearing in the width direction of the ⁇ ) will frequently occur on the ⁇ piece. This will impair the stable operation of continuous production. The inventor of the present invention came up with the idea that the thermal conductivity of the ceramic plate material should be low in order to achieve a stable continuous structure for a long time, and intensively investigated the appropriate range.
- the thermal conductivity of the material is specified to be 8 W / (mK) or less.
- preferred thermal properties are a thermal conductivity of 6 WZ (mK) or less, and a thermal shock resistance index R 'of 1200 WZm or more. Rate is 4W / (m ⁇ K) or less, and thermal shock resistance index R 'is 1500W / m or more.
- the erosion resistance which is one of the chemical properties, is set to be superior to the A1 equivalent content of 9% by mass or more.
- the contact angle 0) is specified to be 120 ° or more.
- the wettability with molten steel is preferably basically poor, and this has been known for a long time. Until then, it had not been included in research.
- the present inventor has conducted intensive studies on the appropriate range, and as a result, in order to further suppress the generation and adhesion of metal to the side dam, and to ensure a long-term stable continuous production operation. Found that it was necessary to maintain the wettability (contact angle 0) with molten steel at 120 ° or more.
- the lower limit of the appropriate range of wettability (contact angle 0) with molten steel is set to 120 °.
- preferred wettability is 130 ° or more, and more preferred wettability (contact angle 0) is 150 ° or more.
- the material of the present invention is, in terms of components, in mass%, BN: 5% or more and 20% or less, and A1N: more than 15%. % And Si 3 N 4 : 40% or more and 80% or less.
- Si 3 N 4 is used as the main component, if the content is less than 40%, the required strength, hardness and wear resistance cannot be obtained, so the lower limit is set to 40%.
- the preferable range of the Si 3 N 4 content is 50 to 70%, and the more preferable range is 55 to 65%.
- BN is a conventionally used ceramic, but is contained in the material of the present invention in an upper limit of 20%. This is because if the content exceeds 20%, the required thermal properties can be obtained, but the required level of wear resistance of the material of the present invention cannot be obtained.
- the lower limit is set to 5%.
- a preferable range of the BN content is less than 10 to 20%, and a more preferable range is 12.5 to 17.5%.
- A1N is as described above.
- the material of the present invention contains BN, A1N, and Si 3 N 4 as basic components.
- other ceramics for example, as long as the properties of the material of the present invention are not impaired, for example, , A1 2 0 3: 15% 1% or more less, MgO: 15% 1% or more less, Zr0 2: 30% 1% or more less, and, Y 2 0 3: 1% or more 15.
- One or two or more such as / 0 or less may be contained.
- a side dam was constructed using a ceramic plate material that did not meet the conditions specified in the present invention, and a continuous production of molten stainless steel was performed. The results are shown below.
- content contained 5 wt% of A1, BN: 20% and Si 3 N 4:
- the operation in the continuous production of molten stainless steel, even if the production per cast increases, the operation can be performed stably and continuously for a long time, so that the composition and the structure are uniform. Pieces can be obtained with good production efficiency.
- the present invention greatly contributes to the development of continuous stainless steel manufacturing technology.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60137218T DE60137218D1 (de) | 2000-05-17 | 2001-05-17 | Keramische platte als seitenwehr einer zweirollen-stranggiessanlage |
US10/031,317 US6843304B2 (en) | 2000-05-17 | 2001-05-17 | Ceramic plate for side weir of twin drum type continuous casting apparatus |
EP01932123A EP1287927B1 (en) | 2000-05-17 | 2001-05-17 | Ceramic plate for side weir of twin drum type continuous casting apparatus |
CA002374965A CA2374965C (en) | 2000-05-17 | 2001-05-17 | Ceramic plate material for side dam of twin-drum strip caster |
AU58768/01A AU759943B2 (en) | 2000-05-17 | 2001-05-17 | Ceramic plate for side weir of twin drum type continuous casting apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000144980A JP3684138B2 (ja) | 2000-05-17 | 2000-05-17 | 双ドラム式連鋳サイド堰用セラミックプレート材 |
JP2000-144980 | 2000-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001087517A1 true WO2001087517A1 (fr) | 2001-11-22 |
Family
ID=18651553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/004138 WO2001087517A1 (fr) | 2000-05-17 | 2001-05-17 | Plaque ceramique pour deversoir lateral d'un appareil de coulee continue de type double rouleau |
Country Status (9)
Country | Link |
---|---|
US (1) | US6843304B2 (ja) |
EP (1) | EP1287927B1 (ja) |
JP (1) | JP3684138B2 (ja) |
KR (1) | KR100558018B1 (ja) |
CN (1) | CN1380841A (ja) |
AU (1) | AU759943B2 (ja) |
CA (1) | CA2374965C (ja) |
DE (1) | DE60137218D1 (ja) |
WO (1) | WO2001087517A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3999993B2 (ja) * | 2002-04-02 | 2007-10-31 | 新日本製鐵株式会社 | 双ドラム式薄板連続鋳造用サイド堰セラミックスプレート |
JP4873626B2 (ja) * | 2006-10-12 | 2012-02-08 | 学校法人常翔学園 | 双ロール式縦型鋳造装置及び複合材料シート製造方法 |
US7888158B1 (en) * | 2009-07-21 | 2011-02-15 | Sears Jr James B | System and method for making a photovoltaic unit |
JP5618964B2 (ja) * | 2011-10-27 | 2014-11-05 | 学校法人常翔学園 | 双ロール式縦型鋳造装置及び複合材料シート製造方法 |
JPWO2020158882A1 (ja) * | 2019-01-31 | 2021-12-02 | デンカ株式会社 | セラミックス焼結体及びその製造方法、並びにノズル部材 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4640336A (en) * | 1984-10-01 | 1987-02-03 | Toshiba Ceramics Co., Ltd. | Refractory for continuous casting |
JPS62166054A (ja) * | 1986-01-14 | 1987-07-22 | Mitsubishi Heavy Ind Ltd | 薄板連続鋳造装置 |
JPH03207554A (ja) * | 1990-01-05 | 1991-09-10 | Nippon Steel Corp | ツインドラム式連続鋳造機のサイド堰 |
JPH04342468A (ja) * | 1991-05-17 | 1992-11-27 | Kawasaki Refract Co Ltd | 連続鋳造用耐火物及びその製造方法 |
JPH05170544A (ja) * | 1991-12-25 | 1993-07-09 | Kawasaki Refract Co Ltd | 連続鋳造用耐火物及びその製造方法 |
JPH05262566A (ja) * | 1992-03-17 | 1993-10-12 | Toshiba Ceramics Co Ltd | 水平連続鋳造用耐火物 |
JPH0760411A (ja) * | 1993-08-27 | 1995-03-07 | Nippon Steel Corp | 広幅薄肉鋳片の連続鋳造用サイド堰 |
JPH0768354A (ja) * | 1993-08-31 | 1995-03-14 | Nippon Yakin Kogyo Co Ltd | 双ロール式連続鋳造装置 |
JPH09155509A (ja) * | 1995-12-01 | 1997-06-17 | Toshiba Ceramics Co Ltd | ツインロール式ストリップキャスト用サイドダム |
Family Cites Families (10)
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JPH0617268B2 (ja) * | 1983-08-30 | 1994-03-09 | 東芝セラミックス株式会社 | 連続鋳造用耐火物 |
JPS60162557A (ja) * | 1984-02-03 | 1985-08-24 | Mitsubishi Heavy Ind Ltd | 薄板連続鋳造装置 |
JPS61286045A (ja) * | 1985-06-12 | 1986-12-16 | Mitsubishi Heavy Ind Ltd | 連続鋳造装置 |
JP2580249B2 (ja) * | 1988-05-06 | 1997-02-12 | 新日本製鐵株式会社 | 連続鋳造用加熱鋳型 |
FR2671991A1 (fr) * | 1991-01-25 | 1992-07-31 | Usinor Sacilor | Materiau refractaire pour petite face d'une installation de coulee continue des metaux entre cyclindres, et petite face ainsi realisee. |
WO1993011893A1 (fr) * | 1991-12-19 | 1993-06-24 | Nippon Steel Corporation | Procede et appareil du type a deux cylindres de coulee continue de toles fines |
JPH0761867A (ja) * | 1993-08-24 | 1995-03-07 | Kurosaki Refract Co Ltd | セラミック材 |
IT1284201B1 (it) * | 1996-07-31 | 1998-05-08 | Sviluppo Materiali Spa | Piastre con riporti ceramici antiusura per macchine per colata conntinua di corpi piani sottili e procedimento per la loro |
AU704066B2 (en) * | 1997-02-17 | 1999-04-15 | Nippon Steel & Sumitomo Metal Corporation | Twin drum type continuous strip casting apparatus and continuous casting method for the same |
US6257315B1 (en) * | 1997-10-28 | 2001-07-10 | Ishikawajima-Harima Heavy Industries Company Ltd. | Casting steel strip |
-
2000
- 2000-05-17 JP JP2000144980A patent/JP3684138B2/ja not_active Expired - Lifetime
-
2001
- 2001-05-17 AU AU58768/01A patent/AU759943B2/en not_active Ceased
- 2001-05-17 US US10/031,317 patent/US6843304B2/en not_active Expired - Lifetime
- 2001-05-17 KR KR1020027000673A patent/KR100558018B1/ko active IP Right Grant
- 2001-05-17 WO PCT/JP2001/004138 patent/WO2001087517A1/ja active IP Right Grant
- 2001-05-17 EP EP01932123A patent/EP1287927B1/en not_active Expired - Lifetime
- 2001-05-17 CA CA002374965A patent/CA2374965C/en not_active Expired - Lifetime
- 2001-05-17 CN CN01801290A patent/CN1380841A/zh active Pending
- 2001-05-17 DE DE60137218T patent/DE60137218D1/de not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4640336A (en) * | 1984-10-01 | 1987-02-03 | Toshiba Ceramics Co., Ltd. | Refractory for continuous casting |
JPS62166054A (ja) * | 1986-01-14 | 1987-07-22 | Mitsubishi Heavy Ind Ltd | 薄板連続鋳造装置 |
JPH03207554A (ja) * | 1990-01-05 | 1991-09-10 | Nippon Steel Corp | ツインドラム式連続鋳造機のサイド堰 |
JPH04342468A (ja) * | 1991-05-17 | 1992-11-27 | Kawasaki Refract Co Ltd | 連続鋳造用耐火物及びその製造方法 |
JPH05170544A (ja) * | 1991-12-25 | 1993-07-09 | Kawasaki Refract Co Ltd | 連続鋳造用耐火物及びその製造方法 |
JPH05262566A (ja) * | 1992-03-17 | 1993-10-12 | Toshiba Ceramics Co Ltd | 水平連続鋳造用耐火物 |
JPH0760411A (ja) * | 1993-08-27 | 1995-03-07 | Nippon Steel Corp | 広幅薄肉鋳片の連続鋳造用サイド堰 |
JPH0768354A (ja) * | 1993-08-31 | 1995-03-14 | Nippon Yakin Kogyo Co Ltd | 双ロール式連続鋳造装置 |
JPH09155509A (ja) * | 1995-12-01 | 1997-06-17 | Toshiba Ceramics Co Ltd | ツインロール式ストリップキャスト用サイドダム |
Non-Patent Citations (1)
Title |
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See also references of EP1287927A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA2374965A1 (en) | 2001-11-22 |
EP1287927A1 (en) | 2003-03-05 |
US6843304B2 (en) | 2005-01-18 |
JP2001321896A (ja) | 2001-11-20 |
EP1287927A4 (en) | 2005-06-01 |
JP3684138B2 (ja) | 2005-08-17 |
DE60137218D1 (de) | 2009-02-12 |
CN1380841A (zh) | 2002-11-20 |
AU5876801A (en) | 2001-11-26 |
AU759943B2 (en) | 2003-05-01 |
EP1287927B1 (en) | 2008-12-31 |
CA2374965C (en) | 2005-12-06 |
US20020104640A1 (en) | 2002-08-08 |
KR20020026541A (ko) | 2002-04-10 |
KR100558018B1 (ko) | 2006-03-07 |
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