CA2701848A1 - Continuous casting nozzle and production method therefor - Google Patents
Continuous casting nozzle and production method therefor Download PDFInfo
- Publication number
- CA2701848A1 CA2701848A1 CA2701848A CA2701848A CA2701848A1 CA 2701848 A1 CA2701848 A1 CA 2701848A1 CA 2701848 A CA2701848 A CA 2701848A CA 2701848 A CA2701848 A CA 2701848A CA 2701848 A1 CA2701848 A1 CA 2701848A1
- Authority
- CA
- Canada
- Prior art keywords
- intermediate layer
- side layer
- layer
- inner bore
- mass
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
A nozzle for continuous casting in which durability is enhanced by arranging a refractory layer of high performance, e.g. high corrosion resistance or high adhesion preventive properties, on the inner hole side. A method for manufacturing a nozzle for continuous casting in which push breaking of the outer circumferential side layer due to the difference in thermal expansion between the inner hole side layer and the outer circumferential side layer of body material is prevented, and exfoliation of the inner hole side layer in the way of casting is prevented, is also provided. The nozzle for continuous casting has such an integral structure as the boundary portion of the inner hole side layer (2) and an intermediate layer (4) touches the boundary portion of the intermediate layer (4) and the outer circumferential side layer (3) directly wherein the bonding strength of the intermediate layer and the inner hole side layer and the outer circumferential side layer adjoining the intermediate layer is 0.01-1.5 Mpa in a 1000°C non-oxidizing atmosphere, and a compression rate K(%) of the intermediate layer in the 1000°C non-oxidizing atmosphere under the pressure of 2.5 Mpa is 10%-80%.
Claims (6)
1. A continuous casting nozzle comprising a tubular refractory structure which has an inner bore formed along an axial direction thereof to allow molten metal to pass therethrough, and at least partly includes an inner bore- side layer disposed on the side of said inner bore, and an outer periphery- side layer disposed on a radially outward side relative to said inner bore- side layer, wherein said inner bore-side layer has the thermal expansion greater than that of said outer periphery- side layer, said continuous casting nozzle being characterized in that said tubular refractory structure includes an intermediate layer having compressability and lying between said inner bore- side layer and said outer periphery- side layer, wherein:
said inner bore- side layer, said intermediate layer and said outer periphery-side layer are simultaneously integrated together during a forming process to form a multi-layer structure;
a bonding strength between said intermediate layer and each of said inner bore-side layer and said outer periphery- side layer adjacent to said intermediate layer is in the range of 0.01 to 1.5 MPa, as measured in a non-oxidation atmosphere at 1000°C; and said intermediate layer has a compressive rate K (%) satisfies the following Formula I as measured in a non-oxidation atmosphere at 1000°C under a pressure of
said inner bore- side layer, said intermediate layer and said outer periphery-side layer are simultaneously integrated together during a forming process to form a multi-layer structure;
a bonding strength between said intermediate layer and each of said inner bore-side layer and said outer periphery- side layer adjacent to said intermediate layer is in the range of 0.01 to 1.5 MPa, as measured in a non-oxidation atmosphere at 1000°C; and said intermediate layer has a compressive rate K (%) satisfies the following Formula I as measured in a non-oxidation atmosphere at 1000°C under a pressure of
2.5 MPa, K >= [(Di × .alpha.i - Do × .alpha.o)/(2 × Tm)] ---Formula 1 wherein: Di is an outer diameter (mm) of said inner bore- side layer;
Do is an inner diameter (mm) of said outer periphery- side layer;
Tm is an initial thickness (mm) of said intermediate layer at room temperature;
.alpha.i is a maximum thermal expansion coefficient (%) of the refractory composition of said inner bore- side layer in a temperature range of room temperature to 1500°C; and .alpha.o is a thermal expansion coefficient (%) of the refractory composition of said outer periphery- side layer at a temperature at start of discharge or pouring of molten metal through said continuous casting nozzle.
2. The continuous casting nozzle as defined in claim 1, wherein said intermediate layer in a state after being subjected to a heat treatment in a non-oxidation atmosphere at 600°C or more contains expanded expansive graphite particles (hereinafter referred to as "expanded graphite particles").
Do is an inner diameter (mm) of said outer periphery- side layer;
Tm is an initial thickness (mm) of said intermediate layer at room temperature;
.alpha.i is a maximum thermal expansion coefficient (%) of the refractory composition of said inner bore- side layer in a temperature range of room temperature to 1500°C; and .alpha.o is a thermal expansion coefficient (%) of the refractory composition of said outer periphery- side layer at a temperature at start of discharge or pouring of molten metal through said continuous casting nozzle.
2. The continuous casting nozzle as defined in claim 1, wherein said intermediate layer in a state after being subjected to a heat treatment in a non-oxidation atmosphere at 600°C or more contains expanded expansive graphite particles (hereinafter referred to as "expanded graphite particles").
3. The continuous casting nozzle as defined in claim 1 or 2, wherein said intermediate layer in a state after being subjected to a heat treatment in a non-oxidation atmosphere at 1000°C
contains a carbon component (except any carbon compound with the remaining components) in a total amount of 16 mass% or more (including 100 mass%).
contains a carbon component (except any carbon compound with the remaining components) in a total amount of 16 mass% or more (including 100 mass%).
4. The continuous casting nozzle as defined in claim 1 or 2, wherein said intermediate layer in a state after being subjected to a heat treatment in a non-oxidation atmosphere at 1000°C
contains a carbon component (except any carbon compound with the remaining components) in a total amount of 16 mass% or more, with the remainder other than said carbon component being a refractory material comprising one or more selected from the group consisting of oxide, carbide, nitride and metal.
contains a carbon component (except any carbon compound with the remaining components) in a total amount of 16 mass% or more, with the remainder other than said carbon component being a refractory material comprising one or more selected from the group consisting of oxide, carbide, nitride and metal.
5. A method of producing a continuous casting nozzle comprising a tubular refractory structure which has an inner bore formed along an axial direction thereof to allow molten metal to pass therethrough, and at least partly includes an inner bore- side layer, an intermediate layer and an outer periphery- side layer which are arranged in this order in a radially outward direction with respect to said inner bore, said method comprising the steps of:
preparing a mixture (ingredients) for said intermediate layer, which contains un-expanded expansive graphite particles in an amount ranging from 5 to 45 mass%, and burnable particles in an amount ranging from 55 to 95 mass%, and further contains an organic binder in a given mass%, with respect to a total mass% of said un-expanded expansive graphite particles and said burnable particles, and in addition to said total mass%, wherein said given mass% of said organic binder is set to allow a ratio of a carbon component only of said organic binder (except any carbon compound with the remaining components) to an entire refractory composition of said intermediate layer, in a state after the refractory composition of said intermediate layer is subjected to a heat treatment in a non-oxidation atmosphere at 1000°C, to fall within the ringe of 2.5 to 15 mass%;
subjecting said mixture (ingredients) for said intermediate layer to a pressure forming using a cold isostatic pressing (CIP) machine, simultaneously and integrally together with a mixture (ingredients) for said inner bore- side layer and a mixture (ingredients) for outer periphery- side layer, to obtain a single shaped body; and subjecting said shaped body to a heat treatment at a temperature of 600 to 1300°C to allow said burnable particles contained in said mixture (ingredients, i.e., green body after pressing) for said intermediate layer in said shaped body to be vanished so as to form voids, and then expand said un-expanded expansive graphite particles contained in said mixture (ingredients, i.e., green body after pressing) for said intermediate layer in said shaped body so as to allow said voids to be filled with said expanded graphite particles.
preparing a mixture (ingredients) for said intermediate layer, which contains un-expanded expansive graphite particles in an amount ranging from 5 to 45 mass%, and burnable particles in an amount ranging from 55 to 95 mass%, and further contains an organic binder in a given mass%, with respect to a total mass% of said un-expanded expansive graphite particles and said burnable particles, and in addition to said total mass%, wherein said given mass% of said organic binder is set to allow a ratio of a carbon component only of said organic binder (except any carbon compound with the remaining components) to an entire refractory composition of said intermediate layer, in a state after the refractory composition of said intermediate layer is subjected to a heat treatment in a non-oxidation atmosphere at 1000°C, to fall within the ringe of 2.5 to 15 mass%;
subjecting said mixture (ingredients) for said intermediate layer to a pressure forming using a cold isostatic pressing (CIP) machine, simultaneously and integrally together with a mixture (ingredients) for said inner bore- side layer and a mixture (ingredients) for outer periphery- side layer, to obtain a single shaped body; and subjecting said shaped body to a heat treatment at a temperature of 600 to 1300°C to allow said burnable particles contained in said mixture (ingredients, i.e., green body after pressing) for said intermediate layer in said shaped body to be vanished so as to form voids, and then expand said un-expanded expansive graphite particles contained in said mixture (ingredients, i.e., green body after pressing) for said intermediate layer in said shaped body so as to allow said voids to be filled with said expanded graphite particles.
6. A method of producing a continuous casting nozzle comprising a tubular refractory structure which has an inner bore formed along an axial direction thereof to allow molten metal to pass therethrough, and at least partly includes an inner bore- side layer, an intermediate layer and an outer periphery- side layer which are arranged in this order in a radially outward direction with respect to said inner bore, said method comprising the steps of:
preparing a mixture (ingredients) for said intermediate layer, which contains un-expanded expansive graphite particles in an amount ranging from 5 to 45 mass%, burnable particles in an amount ranging from 55 to 95 mass%, and a refractory material which is one or more selected from the group consisting of oxide, carbide, nitride and metal, in a total amount of 40 mass% or less, and further contains an organic binder in a given mass%, with respect to a total mass% of said un-expanded expansive graphite particles, said burnable particles and said refractory material which is one or more selected from the group consisting of oxide, carbide, nitride and metal, and in addition to said total mass%, wherein said given mass% of said organic binder is set to allow a ratio of a carbon component only of said organic binder (except any carbon compound with the remaining components) to an entire refractory composition of said intermediate layer, in a state after the refractory composition of said intermediate layer is subjected to a heat treatment in a non-oxidation atmosphere at 1000°C, to fall within the range of 2.5 to 15 mass%;
subjecting said mixture (ingredients) for said intermediate layer to a pressure forming using a cold isostatic press (CIP) machine, simultaneously and integrally together with a mixture (ingredients) for said inner bore- side layer and a mixture (ingredients) for outer periphery- side layer, to obtain a single shaped body; and subjecting said shaped body to a heat treatment at a temperature of 600 to 1300°C to allow said burnable particles contained in said mixture (ingredients, i.e. green body after pressing) for said intermediate layer in said shaped body to be vanished so as to form voids, and then expand said un-expanded expansive graphite particles contained in said mixture (ingredients, i.e. green body after pressing) for said intermediate layer in said shaped body so as to allow said voids to be filled with said expanded graphite particles.
preparing a mixture (ingredients) for said intermediate layer, which contains un-expanded expansive graphite particles in an amount ranging from 5 to 45 mass%, burnable particles in an amount ranging from 55 to 95 mass%, and a refractory material which is one or more selected from the group consisting of oxide, carbide, nitride and metal, in a total amount of 40 mass% or less, and further contains an organic binder in a given mass%, with respect to a total mass% of said un-expanded expansive graphite particles, said burnable particles and said refractory material which is one or more selected from the group consisting of oxide, carbide, nitride and metal, and in addition to said total mass%, wherein said given mass% of said organic binder is set to allow a ratio of a carbon component only of said organic binder (except any carbon compound with the remaining components) to an entire refractory composition of said intermediate layer, in a state after the refractory composition of said intermediate layer is subjected to a heat treatment in a non-oxidation atmosphere at 1000°C, to fall within the range of 2.5 to 15 mass%;
subjecting said mixture (ingredients) for said intermediate layer to a pressure forming using a cold isostatic press (CIP) machine, simultaneously and integrally together with a mixture (ingredients) for said inner bore- side layer and a mixture (ingredients) for outer periphery- side layer, to obtain a single shaped body; and subjecting said shaped body to a heat treatment at a temperature of 600 to 1300°C to allow said burnable particles contained in said mixture (ingredients, i.e. green body after pressing) for said intermediate layer in said shaped body to be vanished so as to form voids, and then expand said un-expanded expansive graphite particles contained in said mixture (ingredients, i.e. green body after pressing) for said intermediate layer in said shaped body so as to allow said voids to be filled with said expanded graphite particles.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007262959A JP5148963B2 (en) | 2007-10-09 | 2007-10-09 | Continuous casting nozzle |
| JP2007-262959 | 2007-10-09 | ||
| JP2008-167836 | 2008-06-26 | ||
| JP2008167836A JP4589425B2 (en) | 2008-06-26 | 2008-06-26 | Nozzle for continuous casting and manufacturing method thereof |
| PCT/JP2008/061928 WO2009047936A1 (en) | 2007-10-09 | 2008-07-01 | Nozzle for continuous casting and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2701848A1 true CA2701848A1 (en) | 2009-04-16 |
| CA2701848C CA2701848C (en) | 2012-09-04 |
Family
ID=40522273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2701848A Expired - Fee Related CA2701848C (en) | 2007-10-09 | 2008-07-01 | Continuous casting nozzle and production method therefor |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20090090481A1 (en) |
| EP (1) | EP2198992B1 (en) |
| KR (1) | KR101171367B1 (en) |
| CN (1) | CN101821037B (en) |
| AU (1) | AU2008310427B2 (en) |
| BR (1) | BRPI0819083B1 (en) |
| CA (1) | CA2701848C (en) |
| WO (1) | WO2009047936A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164695B (en) * | 2008-07-28 | 2014-03-12 | 新日铁住金株式会社 | Refractory for nozzle used in continuous casting and nozzle for continuous casting |
| US20140086670A1 (en) * | 2011-05-27 | 2014-03-27 | Toyo Tanso Co., Ltd. | Joint of metal material and ceramic-carbon composite material, method for producing same, carbon material joint, jointing material for carbon material joint, and method for producing carbon material joint |
| AU2012343466B2 (en) * | 2011-12-01 | 2015-02-12 | Krosakiharima Corporation | Refractory and nozzle for casting |
| KR102636943B1 (en) * | 2015-03-26 | 2024-02-16 | 도레이 카부시키가이샤 | Filter material for air filter |
| CN105642877B (en) * | 2016-01-26 | 2018-01-02 | 辽宁科技大学 | Silicon carbide whisker combination high-strength compound submersed nozzle and manufacture method |
| CN109534837B (en) * | 2019-01-09 | 2021-07-27 | 山东中鹏特种陶瓷有限公司 | Silicon carbide coated graphite sagger and manufacturing process thereof |
| CN109732073B (en) * | 2019-01-24 | 2021-04-30 | 北京利尔高温材料股份有限公司 | Gradient composite tundish nozzle for continuous casting and preparation method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6072978A (en) | 1983-09-30 | 1985-04-25 | Showa Taika Renga Kk | Graphite sealing material |
| JPS63157747A (en) | 1986-12-22 | 1988-06-30 | Tokyo Yogyo Co Ltd | Submerged nozzle for continuous casting |
| DE4003608C1 (en) | 1990-02-07 | 1991-06-27 | Didier-Werke Ag, 6200 Wiesbaden, De | |
| FR2755384B1 (en) * | 1996-11-06 | 1998-11-27 | Usinor Sacilor | PROTECTIVE COATING FOR ELEMENTS OF REFRACTORY MATERIAL OF A CONTINUOUS CASTING LINGOTIERE OF METALS, AND ELEMENTS OF REFRACTORY MATERIAL PROTECTED USING THIS COATING |
| JPH10305357A (en) * | 1997-05-07 | 1998-11-17 | Shinagawa Refract Co Ltd | Interpolation type dipping nozzle for continuous molding |
| JP2001286995A (en) * | 2000-04-05 | 2001-10-16 | Shinagawa Refract Co Ltd | Refractory packing material |
| JP2002338347A (en) * | 2001-05-17 | 2002-11-27 | Kurosaki Harima Corp | Zirconia-graphite fire resisting material and immersion nozzle for continuous casting using the material |
| US7172013B2 (en) * | 2002-04-02 | 2007-02-06 | Krosakiharima Corporation | Binding structure of refractory sleeve for inner hole of nozzle for continuous casting |
| JP4644044B2 (en) * | 2004-10-04 | 2011-03-02 | 黒崎播磨株式会社 | Long nozzle for continuous casting |
| JP4512560B2 (en) | 2006-03-03 | 2010-07-28 | 新日本製鐵株式会社 | Continuous casting nozzle |
-
2008
- 2008-07-01 BR BRPI0819083A patent/BRPI0819083B1/en not_active IP Right Cessation
- 2008-07-01 CN CN2008801107032A patent/CN101821037B/en not_active Expired - Fee Related
- 2008-07-01 AU AU2008310427A patent/AU2008310427B2/en not_active Ceased
- 2008-07-01 EP EP08790791A patent/EP2198992B1/en not_active Not-in-force
- 2008-07-01 WO PCT/JP2008/061928 patent/WO2009047936A1/en active Application Filing
- 2008-07-01 CA CA2701848A patent/CA2701848C/en not_active Expired - Fee Related
- 2008-07-01 KR KR1020107009113A patent/KR101171367B1/en active IP Right Grant
- 2008-08-26 US US12/198,683 patent/US20090090481A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008310427A1 (en) | 2009-04-16 |
| EP2198992A4 (en) | 2011-03-30 |
| CN101821037B (en) | 2012-07-25 |
| KR20100080915A (en) | 2010-07-13 |
| BRPI0819083B1 (en) | 2016-09-20 |
| EP2198992B1 (en) | 2013-01-23 |
| BRPI0819083A2 (en) | 2015-04-22 |
| EP2198992A1 (en) | 2010-06-23 |
| WO2009047936A1 (en) | 2009-04-16 |
| CN101821037A (en) | 2010-09-01 |
| US20090090481A1 (en) | 2009-04-09 |
| KR101171367B1 (en) | 2012-08-10 |
| AU2008310427B2 (en) | 2011-03-31 |
| CA2701848C (en) | 2012-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160704 |