KR100318491B1 - Sliding plate refractory for flow controling of molten metal - Google Patents
Sliding plate refractory for flow controling of molten metal Download PDFInfo
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- KR100318491B1 KR100318491B1 KR1020010044101A KR20010044101A KR100318491B1 KR 100318491 B1 KR100318491 B1 KR 100318491B1 KR 1020010044101 A KR1020010044101 A KR 1020010044101A KR 20010044101 A KR20010044101 A KR 20010044101A KR 100318491 B1 KR100318491 B1 KR 100318491B1
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 16
- 239000011819 refractory material Substances 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 6
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 230000035939 shock Effects 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 3
- 239000004014 plasticizer Substances 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910017109 AlON Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Classifications
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- 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
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- 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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- B22D11/10—Supplying or treating molten metal
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
본 발명은 용융금속 흐름을 제어하는 장치에 이용되는 슬라이딩 플레이트의 내화재에 대하여 용강류 및 비금속 산화물에 대해 내용손, 열충격 및 산화에 따른 균열을 방지하는데 적합한 슬라이딩 플레이트(Sliding plate) 내화재질에 관한 것이다.The present invention relates to a sliding plate refractory material suitable for preventing cracks due to solvent loss, thermal shock and oxidation for molten steel and nonmetal oxides with respect to the refractory material of a sliding plate used in an apparatus for controlling molten metal flow. .
이에 따른 구성은 소결 또는 전융 알루미나(Al2O3) 60∼125중량부, 50㎛이하의 입경을 갖는 가소 알루미나 10∼20 중량부, 소결 또는 전융 알루미나(Al2O3)-지르코니아(ZrO2) 15∼60중량부, 금속실리콘(Si) 1∼5중량부, 탄소(C) 1∼8중량부, 산화방지제 0.5∼4.0중량부로 조성됨을 특징으로 하는 용융금속 흐름 제어용 슬라이딩 플레이트의 내화재에 관한 기술이다.In accordance with the configuration, the sintering jeonyung or alumina (Al 2 O 3) 60~125 parts by weight, 10 to 20 parts by weight of a plasticizer alumina having a particle size of less than 50㎛, sintering or jeonyung alumina (Al 2 O 3) - zirconia (ZrO 2 ) 15 to 60 parts by weight, 1 to 5 parts by weight of metal silicon (Si), 1 to 8 parts by weight of carbon (C), 0.5 to 4.0 parts by weight of the antioxidant, characterized in that the refractory material of the sliding plate for molten metal flow control Technology.
Description
본 발명은 용융금속의 흐름을 제어하는 장치에 이용되고 있는 슬라이딩 플레이트(Sliding plate)의 내화재에 관한 것으로, 보다 상세하게는 용강류 및 비금속 산화물에 대한 내용손, 열충격 및 산화에 따른 균열을 방지하는데 적합한 슬라이딩 플레이트 내화재질에 관한 것이다.The present invention relates to a refractory material of a sliding plate used in an apparatus for controlling the flow of molten metal, and more particularly, to prevent cracking due to loss of contents, thermal shock and oxidation of molten steel and nonmetal oxides. It relates to a suitable sliding plate refractory material.
일반적으로 레들(Ladle) 및 턴디쉬(Tundish) 하부에는 용강의 배출 및 그 배출량을 제어하기 위한 슬라이딩 플레이트가 장착된다.In general, a sliding plate for controlling the discharge of molten steel and the discharge of the lower portion of the ladle and tundish is mounted.
즉, 도 1과 같이 상부노즐(1)과 하부노즐(2)이 장착되고 그들 사이에는 내화재질로된 상부 슬라이딩 플레이트(3)와 하부 슬라이딩 플레이트(4)가 설치된다.That is, as shown in FIG. 1, the upper nozzle 1 and the lower nozzle 2 are mounted, and between them, the upper sliding plate 3 and the lower sliding plate 4 made of refractory materials are installed.
이와 같은 슬라이딩 플레이트는 주조시간 및 사용회수, 주조후 산소세척, 강종등에 따라 그 수명이 결정되는데, 이들 내화재는 주조초 열충격, 카세트 변형, 면압유지불량, 플레이트의 지지방식, 형상, 레들 또는 턴디쉬의 바닥 평탄도에 등에 따른 구속응력의 편차 발생으로 균열이 일어나게 된다.Such sliding plates have a lifespan determined by casting time and the number of times of use, oxygen cleaning after casting, and steel grades. These refractory materials have a thermal shock, cassette deformation, surface pressure maintenance failure, plate support, shape, ladle or tundish The cracking occurs due to the deviation of restraint stress due to the bottom flatness.
상기 발생된 균열은 용강류에 질소나 산소의 유입을 초래하여 용강의 품질을 저하시키며, 사용중 슬라이딩 플레이트 내화재의 탈락을 일으켜 제강, 연속주조 조업시 용강유출의 문제를 야기시킬 수 있다.The cracks may cause inflow of nitrogen or oxygen into the molten steel, thereby degrading the quality of the molten steel and causing the sliding plate refractory to fall off during use, which may cause problems of molten steel during steelmaking and continuous casting operations.
또한 용강류에 의한 마모나 비금속 산화물에 의한 용손, 산화 및 황폐화 현상이 일어나게 되는데 이러한 현상은 내용성 향상을 위해 첨가한 탄소(carbon)가 사용중 산화에 의해 탈탄되어 이들 성분에 의한 조직 결합력이 약화되고 이에 따른 공극현상과 비금속 산화물에 의한 부착이 용이하게 이루어져 슬라이딩되는 부위의 내화재 구성부분 일부가 용손되는 것이다.In addition, wear caused by molten steel, melt loss, oxidation and deterioration caused by non-metal oxides occur. This phenomenon is that carbon added to improve the contents is decarburized by oxidation during use, thereby weakening tissue binding force by these components. Accordingly, the part of the refractory material of the sliding portion is easily melted due to the pore phenomena and the adhesion by the nonmetal oxide.
상기와 같은 문제점을 해결하기 위한 일환으로서 종래의 슬라이딩 플레이트 내화재의 조성은 소결 또는 전용 알루미나(Al2O3)를 각입도 분포로 구획하여 주성분으로한 80∼85 중량부, 입도가 50㎛ 이하인 가소 알루미나 5∼10 중량부, 금속실리콘(Si) 3∼5 중량부, 탄소(C) 4∼6 중량부이고 산화방지제 금속 0.1∼0.5 중량부로 구성되어 있다.As a part of solving the above problems, the composition of the conventional sliding plate refractory material is 80 to 85 parts by weight of the main component by dividing the sintered or dedicated alumina (Al 2 O 3 ) into the particle size distribution, the plasticity of 50㎛ or less It consists of 5-10 weight part of alumina, 3-5 weight part of metal silicon (Si), 4-6 weight part of carbon (C), and 0.1-0.5 weight part of antioxidant metals.
그러나 상기한 내화재질로된 슬라이딩 플레이트는 미세조직의 치밀화가 적기때문에 황폐화 및 용강류에 의한 마모가 심하여 장기간 사용이 곤란하는 등의 문제점이 있다.However, the sliding plate made of the refractory material has a problem that it is difficult to use for a long time due to severe deterioration and abrasion due to molten steel due to the small density of the microstructure.
본 발명은 상기한 종래의 문제점을 해결하기 위한 것으로, 극초미분의 알루미나 사용량을 증대시켜 미세조직의 개선으로 강도를 향상시킴과 함께 지르코니아 (ZrO2)-알루미나(Al2O3)를 적절히 배합시켜 내열 스폴리성 향상과 내열 충격성 및 화학적 내용성을 향상시키는데 적합한 내화재 원료를 제공하고자 하는데 그 목적이 있다.The present invention is to solve the above-mentioned problems, by increasing the amount of ultra-fine alumina to improve the microstructure and to improve the strength and to combine the zirconia (ZrO 2 ) -alumina (Al 2 O 3 ) appropriately It is an object of the present invention to provide a refractory material suitable for improving heat resistance polystyrene and heat shock resistance and chemical resistance.
도 1 은 슬라이딩 플레이트 구조의 단면도1 is a cross-sectional view of a sliding plate structure
도 2 는 중앙에 내삽 되는 슬라이딩 플레이트 구조의 단면도2 is a cross-sectional view of the sliding plate structure interpolated in the center
도면의 주요부분에 대한 부호 설명Explanation of symbols for the main parts of the drawings
3 : 상부 슬라이딩 플레이트3: upper sliding plate
4 : 하부 슬라이딩 플레이트4: lower sliding plate
상기한 목적을 달성하기 위한 본 발명은 각 입경분포를 갖는 소결 또는 전융 알루미나(Al2O3)가 60∼125 중량부, 50㎛ 이하의 입경을 갖는 가소 알루미나가 10∼20 중량부, 소결 또는 전융 알루미나(Al2O3)-지르코니아(ZrO2)가 15∼60 중량부, 금속실리콘(Si) 1∼5 중량부, 탄소(C) 1∼8 중량부, 산화방지제 0.5∼4.0 중량부로 조성된 슬라이딩 플레이트로 이루어진다.The present invention for achieving the above object is 60 to 125 parts by weight of sintered or molten alumina (Al 2 O 3 ) having a particle size distribution, 10 to 20 parts by weight of plasticized alumina having a particle size of 50㎛ or less, sintering or 15 to 60 parts by weight of electrolytic alumina (Al 2 O 3 ) -zirconia (ZrO 2 ), 1 to 5 parts by weight of metal silicon (Si), 1 to 8 parts by weight of carbon (C), and 0.5 to 4.0 parts by weight of antioxidant Consists of a sliding plate.
상기한 소결 또는 전융 알루미나가 상한치 이상이면 내열스폴링성의 저하로 인해 사용중 균열에 의해 제품에 용강의 침윤이 이루어지고, 하한치 이하에서는 용강 및 비금속 성분에 의한 내용성이 저하하게 된다.If the above sintered or molten alumina is above the upper limit, the molten steel is infiltrated into the product due to cracking during use due to the decrease in heat spalling resistance, and below the lower limit, the contents due to the molten steel and the nonmetallic component are lowered.
또한 상기한 소결 또는 전융 알루미나 입경이 4∼1㎜인 경우는 15∼25 중량부이고, 1∼0.22㎜인 경우는 25∼60 중량부이고, 0.2㎜ 이하인 경우는 10∼20 중량부, 0.04㎜ 이하인 경우는 10∼20 중량부 일때가 바람직하다.In the case of the above-mentioned sintered or molten alumina particle diameter of 4 to 1 mm, it is 15 to 25 parts by weight, and when it is 1 to 0.22 mm, it is 25 to 60 parts by weight, and when it is 0.2 mm or less, 10 to 20 parts by weight and 0.04 mm When it is below, it is preferable that it is 10-20 weight part.
상기한 본 발명은 50㎛ 이하의 극초 미분을 갖는 가소 알루미나를 종래 보다 증대시켜 사용함으로서 미세 조직의 개선으로 기계적 강도의 향상과 화학적 내용성을 증가시킨다.According to the present invention, by using plastic alumina having an ultra fine powder of 50 μm or less, it is possible to increase the mechanical strength and chemical resistance by improving the microstructure.
상기한 가소 알루미나가 상한치 이상에서는 제품 제조시 성형 불량의 원인이 되며, 하한치 이하에서는 제품의 미세 조직의 개선이 이루어지지 않아 내용성 개선이 미약하다.Above the upper limit, the calcined alumina is a cause of molding defects during the manufacture of the product, and below the lower limit, the microstructure of the product is not improved, and the improvement in the contents is weak.
또한 본 발명은 알루미나 광물만으로는 내열스폴링성 및 내용성의 개선이 이루어지지 않기 때문에 소결 또는 전융 알루미나-지르코니아 원료를 첨가한 것으로, 상기의 상한치 이상에서는 내용성의 개선 효과가 적고, 하한치 이하에서는 내열스폴링성으로 내용성의 개선이 이루어지지 않는다.In addition, the present invention is a sintered or molten alumina-zirconia raw material is added because the heat-span resistance and the improvement of the resistance is not achieved only by the alumina mineral, the effect of improving the resistance is less than the above upper limit, heat-spoken below the lower limit Sexuality does not improve content.
또한 본 발명은 소결 또는 전융 지르코니아(ZrO2)-알루미나(Al2O3) 중에는 Al2O3가 90∼50중량%이고, ZrO2가 10∼50중량% 함유되고 있는 품위를 갖는 것을 15∼60중량부 조성시킴이 바람직하다.In the present invention, in the sintered or molten zirconia (ZrO 2 ) -alumina (Al 2 O 3 ), it is 15 to 15 having a quality containing 90 to 50% by weight of Al 2 O 3 , 10 to 50% by weight of ZrO 2 The composition is preferably 60 parts by weight.
본 발명의 금속실리콘(Si)은 제품의 결합강도를 높이고, 내열충격성 개선을 위한 것으로, 1∼3 중량부 첨가하여 사용한다. 이 때 3중량부 이상에서는 내용성이 저하되며, 1중량부 이하에서는 강도 및 내열충격성이 개선되지 않는다. 또한 Si의 입경은 0.02mm 이하의 것이 바람직하다.Metal silicon (Si) of the present invention is to improve the bonding strength of the product, and to improve the thermal shock resistance, it is used by adding 1 to 3 parts by weight. At this time, the solvent resistance decreases at 3 parts by weight or more, and at 1 part by weight or less, the strength and the thermal shock resistance do not improve. Moreover, it is preferable that the particle diameter of Si is 0.02 mm or less.
탄소(C)는 내열충격성 및 내용성을 개선하기 위한 것으로, 1∼4 중량부 범위로 한다. 이 때 상한치 이상인 경우는 산화에 의한 조직의 황폐화가 일어나고, 한한치 이하에서는 내열충격성 및 내용성 개선이 감소한다.Carbon (C) is for improving thermal shock resistance and solvent resistance, and is in the range of 1 to 4 parts by weight. At this time, more than the upper limit causes the degradation of the tissue due to oxidation, and below the limit, the thermal shock resistance and the improvement of the contents decrease.
탄소(C)는 무정형(Carbon black, 무연탄 등)이나 결정형(흑연)이 첨가되며 경우에 따라서는 0.2㎜ 보다 큰 입경의 것이 사용될 수도 있으나 바람직하게는 0.2㎜ 이하의 것을 사용한다.As carbon (C), amorphous (carbon black, anthracite, etc.) or crystalline (graphite) is added, and in some cases, a particle diameter larger than 0.2 mm may be used, but preferably 0.2 mm or less.
또한 본 발명은 탄소가 사용중 산화에 의해 탈락됨에 따라 조직결합력 약화로 인해 공극 형성과 비금속 산화물에 의한 부착이 용이하게 이루어져 슬라이딩되는 부위의 내화재 일부가 용손되는 산화 및 황폐화 현상이 일어나므로 이를 개선하기 위해 저온 및 고온에서 산화방지가 가능한 카바이트(Carbides), 붕화물(Borides) 산탄화물(Oxycarbides), 산질화물((Oxynitrides), 유리질상 형성이 가능한 SiO2계, B2O3계, P2O3계, V2O5계의 산화물 또는 비산화물계, 각종 금속류(Al, Iug, Si, Al-Mg, Al-Si 등)와 질화물(BN, ZrN, AlON) 중에서 1종 이상을 0.5∼4.0 중량부 첨가시켜 사용할 수 있다.In addition, according to the present invention, as the carbon is eliminated by oxidation during use, the formation of pore and adhesion by the non-metal oxide are easily performed due to the weakening of the tissue binding force, so that the oxidation and degradation of the refractory material of the sliding part occurs, so as to improve this problem. Carbides, Borides Oxycarbides, Oxynitrides, SiO 2 based on glassy form, B 2 O 3 based, P 2 O 3 type, V 2 O 5, based on an oxide or a non-storage type, and various metals (Al, Iug, Si, Al-Mg, Al-Si, etc.) and the nitride (BN, ZrN, AlON) one or more of 0.5 to 4.0 wt. It can be added by use.
이상과 같은 재질을 슬라이딩 플레이트 전체에 대하여 적용될수 있으나 슬라이딩 플레이트 형상이 큰 경우는 그 중심에 도 2a∼2d와 같은 구조로 하여 내삽시켜 사용할 수도 있다.The above materials can be applied to the entire sliding plate, but when the sliding plate shape is large, it may be interpolated and used as a structure as shown in FIGS. 2A to 2D at the center thereof.
상기 제품 제조는 통상의 조건인 1000-1400℃ 범위에서 산화 또는 환원 분위기 하에서 소성한다.The production of the product is fired under an oxidizing or reducing atmosphere in the usual range of 1000-1400 ° C.
(표 1)∼(표 2)는 본 발명에 대한 실시예를 나타낸 것이다.Tables 1 to 2 show examples of the present invention.
(표 1)-(표 2)나타난 바와 같이 본 발명의 실시예(1∼3)가 종래에 비해 기공율(%)이 적고 압축강도가 증대되고 있음을 알 수 있으며 또한 내침식성 및 내충격성에서도 본 발명이 우수하게 나타났다.As shown in (Table 1)-(Table 2), it can be seen that Examples (1 to 3) of the present invention have less porosity (%) and an increase in compressive strength compared to the prior art, and also in erosion and impact resistance. The invention appeared to be excellent.
이상에서와 같이 본 발명은 알루미나를 주성분으로 하는 원료에 대하여 극세 입경의 양을 증대시킴과 함께 여기에 지르코니아-알루미나계를 적절히 배합하고, 금속규소, 탄소 및 산화방지제를 첨가하여 조성시킴으로서 강도가 증대되고, 열충격 및 산화에 따른 균열의 방지와 내용손이 우수한 슬라이딩 플레이트를 얻게 된다.As described above, the present invention increases the amount of the ultrafine particle diameter with respect to the raw material mainly composed of alumina, and zirconia-alumina is suitably blended thereto, and the strength is increased by adding metal silicon, carbon, and antioxidant. As a result, a sliding plate having excellent thermal protection and cracking prevention due to thermal shock and oxidation can be obtained.
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| KR1020010044101A KR100318491B1 (en) | 2001-07-23 | 2001-07-23 | Sliding plate refractory for flow controling of molten metal |
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