KR100362847B1 - Coating Material and Coating Method of Hot-Dip Galvanized Port Roll - Google Patents
Coating Material and Coating Method of Hot-Dip Galvanized Port Roll Download PDFInfo
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- KR100362847B1 KR100362847B1 KR10-1998-0060097A KR19980060097A KR100362847B1 KR 100362847 B1 KR100362847 B1 KR 100362847B1 KR 19980060097 A KR19980060097 A KR 19980060097A KR 100362847 B1 KR100362847 B1 KR 100362847B1
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- coating layer
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- post
- dip galvanized
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- 239000000463 material Substances 0.000 title claims abstract description 63
- 238000000576 coating method Methods 0.000 title claims abstract description 40
- 239000011248 coating agent Substances 0.000 title claims abstract description 30
- 239000011247 coating layer Substances 0.000 claims abstract description 44
- 238000005524 ceramic coating Methods 0.000 claims abstract description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000008119 colloidal silica Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000004703 alkoxides Chemical class 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000005246 galvanizing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- 239000011701 zinc Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 31
- 239000000843 powder Substances 0.000 description 11
- 150000001298 alcohols Chemical class 0.000 description 4
- 229910009043 WC-Co Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 201000004624 Dermatitis Diseases 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 208000000453 Skin Neoplasms Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 201000000849 skin cancer Diseases 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
Abstract
본 발명은 세라믹 코팅층 내에 존재하는 개기공(開氣孔)을 충진하여 세라믹 코팅층의 조직을 치밀하게 하고 경도 및 내구성을 향상시키는 동시에 후처리 코팅층을 형성하여 포트 롤에 용융아연의 부착을 억제하고 스트립과의 윤활성을 향상시키는 용융아연도금 포트 롤의 코팅재 및 코팅방법을 제공하는 데 그 목적이 있다.The present invention fills the pores present in the ceramic coating layer to densify the structure of the ceramic coating layer, improve hardness and durability, and at the same time form a post-treatment coating layer to suppress the adhesion of molten zinc to the pot roll and An object of the present invention is to provide a coating material and a coating method of a hot-dip galvanized port roll which improves lubricity.
이를 실현하기 위한 본 발명은 용융아연도금 포트 롤의 세라믹 코팅층 상부를 80℃ 이상에서 건조시킨 후 상온으로 냉각하고, 이 세라믹 코팅층에, 중량 %가 Si-, Zr-, Ti-, Al-알콕사이드 : 콜로이달 실리카 : 알콜 : 물 : 촉매 : BN = 5∼30 : 0∼40 : 10∼50 : 5∼25 : 0.3∼5 : 5∼50의 비율로 조성되는 본 발명의 코팅재로 코팅하여 후처리 코팅층을 형성하고, 120∼300℃의 공기중 분위기에서 20∼60분 열처리함을 특징으로 한다.The present invention for realizing this is to dry the upper portion of the ceramic coating layer of the hot-dip galvanized pot roll at 80 ℃ or more and then cooled to room temperature, the weight percent of the ceramic coating layer, Si-, Zr-, Ti-, Al-alkoxide: Colloidal silica: alcohol: water: catalyst: BN = 5-30: 0-40: 10-50: 5-25: 0.3-5: 5-50 after coating with coating material of the present invention It is characterized in that the heat treatment for 20 to 60 minutes in an air atmosphere of 120 to 300 ℃.
Description
본 발명은 용융아연도금 포트 롤의 코팅 처리에 관한 것으로서, 보다 상세하게는 WC-Co, Al2O3를 용사 처리하여 1차로 생성된 세라믹 코팅층을 치밀하게 하고 스트립과의 윤활성을 부여하는 후처리 코팅에 사용되는 코팅재 및 코팅방법에 관한 것이다.The present invention relates to a coating treatment of a hot-dip galvanized pot roll, and more particularly, after-treatment of a ceramic coating layer formed by densely spraying WC-Co and Al 2 O 3 to give lubricity with a strip. It relates to a coating material and a coating method used for coating.
일반적으로 용융아연도금 포트는 소둔로가 있는 연속용융아연 도금 라인에서 소둔로와 쿨링 타워사이에 설치되는 것으로서, 포트 내에는 도금되는 스트립을 원활하게 지지하는 롤이 코팅액에 잠기어 있다. 이 포트 롤은 플라즈마 용사법과 후처리에 의하여 1, 2차로 코팅된다.In general, a hot dip galvanizing port is installed between an annealing furnace and a cooling tower in a continuous hot dip galvanizing line having an annealing furnace, and a roll for smoothly supporting a strip to be plated in the port is immersed in the coating liquid. This pot roll is coated first and second by plasma spraying and post-treatment.
이 플라즈마 용사법에 의한 WC-Co, Al2O3등의 세라믹 코팅층(1차 코팅)은 용사 시 프라즈마에 의해서 용융된 물질을 급냉 응고하기 때문에 조직에 기공이 발생되고, 입계 내의 균열과 같은 결함도 발생된다. 이러한 결함을 보강하기 위하여, 다공성 소결층을 크롬산 용액에 함침시켜 열처리하는 방법이 사용된다. 함침된 CrO3용액은 열처리 과정을 통하여 Cr2O3으로 상변화되면서 기공 내에 석출된다.The ceramic coating layer (primary coating) such as WC-Co and Al 2 O 3 by the plasma spray method rapidly forms and solidifies the molten material by the plasma during spraying, so that pores are generated in the structure and defects such as cracks in grain boundaries are also observed. Is generated. In order to reinforce this defect, a method of heat treatment by impregnating the porous sintered layer in the chromic acid solution is used. The impregnated CrO 3 solution is precipitated in the pores by phase change to Cr 2 O 3 through heat treatment.
또한 용융아연도금 포트 롤에 용융아연이 부착되는 것을 방지하기 위하여, 2차 코팅으로 BN 분말을 Cr2O3용액 내에 분산시켜 후처리한다. 따라서 일반적인 후처리 코팅재는 Cr2O3용액에 BN 분말을 분산한 것을 사용한다.In addition, in order to prevent hot-dip zinc from adhering to the hot-dip galvanized pot roll, BN powder is dispersed in a Cr 2 O 3 solution by a second coating and then treated. Therefore, a general post-treatment coating material uses a dispersion of BN powder in Cr 2 O 3 solution.
그러나 1차 코팅인 세라믹 코팅층의 미세 조직을 치밀하게 하기 위하여 사용되는 2차 코팅인 크롬산 용액은 강력한 산화제로 피부를 손상시켜 피부염을 일으키고, 호흡으로 흡입하면 폐암을 유발하는 등 작업자에게 직업 공해병을 발생시킬 우려가 있다.However, chromic acid solution, a secondary coating used to densify the microstructure of the ceramic coating layer, which is the primary coating, is a powerful oxidant, causing dermatitis by inhaling the skin and lung cancer when inhaled by inhalation. There is a risk of making.
따라서 본 발명은 상기와 같은 문제를 발생시키지 않으면서, 세라믹 코팅층 내에 존재하는 개기공을 충진하여 세라믹 코팅층의 조직을 치밀하게 하고 경도 및 내구성을 향상시킴과 동시에 후처리 코팅층을 형성하여 포트 롤에 용융아연의 부착을 억제하고 스트립과의 윤활성을 향상시키는 용융아연도금 포트 롤의 코팅재 및 코팅방법을 제공하는 데 그 목적이 있다.Therefore, the present invention fills the pores existing in the ceramic coating layer without causing the above problems, thereby densifying the structure of the ceramic coating layer, improving hardness and durability, and simultaneously forming a post-treatment coating layer to melt the pot roll. It is an object of the present invention to provide a coating material and a coating method of a hot dip galvanized port roll which suppresses adhesion of zinc and improves lubricity with a strip.
이를 위하여 본 발명에 따른 용융아연도금 포트 롤의 코팅재는 용융아연도금 포트 롤의 세라믹 코팅층을 후처리하는 코팅재로서, 중량 %가, 금속알콕사이드(Si-, Zr-, Ti-, Al-알콕사이드) : 콜로이달 실리카 : 알콜 : 물 : 촉매 : BN = 5∼30 : 0∼40 : 10∼50 : 5∼25 : 0.3∼5 : 5∼50의 비율로 조성됨을 특징으로 한다.To this end, the coating material of the hot-dip galvanized port roll according to the present invention is a coating material for post-treatment of the ceramic coating layer of the hot-dip galvanized port roll, and the weight% is metal alkoxide (Si-, Zr-, Ti-, Al-alkoxide): Colloidal silica: alcohol: water: catalyst: BN = 5-30: 0-40: 10-50: 5-25: 0.3-5: 5-50.
또 본 발명에 따른 용융아연도금 포트 롤의 코팅방법은 용융아연도금 포트 롤의 세라믹 코팅층 상부를 80℃ 이상에서 건조시킨 후 상온으로 냉각하여 상기 세라믹 코팅층 상부에 후처리 코팅층을 형성하는 코팅방법으로서, 중량 %가 Si-, Zr-, Ti-, Al-알콕사이드 : 콜로이달 실리카 : 알콜 : 물 : 촉매 : BN = 5∼30 : 0∼40 : 10∼50 : 5∼25 : 0.3∼5 : 5∼50의 비율로 조성되는 후처리 코팅재로 상기 후처리 코팅층을 형성할 때, 120∼300℃의 공기중 분위기에서 20∼60분 열처리함을 특징으로 한다.In addition, the coating method of the hot-dip galvanized port roll according to the present invention is a coating method of drying the upper portion of the ceramic coating layer of the hot-dip galvanizing port roll at 80 ℃ or more and cooling to room temperature to form a post-treatment coating layer on the ceramic coating layer. % By weight Si-, Zr-, Ti-, Al-alkoxide: colloidal silica: alcohol: water: catalyst: BN = 5-30: 0-40: 10-50: 5-25: 0.3-5: 5-5 When the post-treatment coating layer is formed of a post-treatment coating material formed at a ratio of 50, the heat treatment is performed for 20 to 60 minutes in an air atmosphere at 120 to 300 ° C.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
후처리 코팅재는 금속알콕사이드(Si-, Zr-, Ti-, Al-알콕사이드), 콜로이달 실리카, 알콜, 물, 촉매, BN 분말, 분산제 등으로 제조되며, 이들은 일정 시간 교반 후 숙성하여 사용된다. 물론, 금속알콕사이드만으로도 세라믹 코팅층에 침투시켜 휘발분을 제외한 양 정도로 금속산화물을 충진할 수 있다. 그러나 이 경우 세라믹 코팅층 표면에 BN을 함유한 후처리 코팅층의 생성이 불가능하다. 기공의 충진 정도는 기공의 크기, 후처리 코팅재의 점도, 열처리 후 불휘발분의 양 등에 의하여 다르게 나타난다. 이러한 후처리 코팅재는, 먼저 금속알콕사이드(Si-, Zr-, Ti-, Al-알콕사이드), 콜로이달 실리카, 알콜, 물, 촉매 등을 원료로 하여 졸을 합성하고, 이 졸에 BN 미분말과 분산제를 사용하여 분산시킨 용액으로 제조된다.The post-treatment coating material is made of metal alkoxides (Si-, Zr-, Ti-, Al-alkoxides), colloidal silica, alcohols, water, catalysts, BN powders, dispersants and the like, which are used after aging for a certain period of time. Of course, only the metal alkoxide may penetrate the ceramic coating layer to fill the metal oxide to an amount excluding volatile matter. However, in this case, it is impossible to produce a post-treatment coating layer containing BN on the surface of the ceramic coating layer. The degree of filling of the pores is different depending on the size of the pores, the viscosity of the after-treatment coating material, the amount of nonvolatile matter after the heat treatment. This post-treatment coating material first synthesizes a sol from metal alkoxides (Si-, Zr-, Ti-, Al-alkoxides), colloidal silica, alcohols, water, catalysts, and the like, and the BN fine powder and dispersant are added to the sol. It is prepared as a solution dispersed using.
열처리는 120∼300℃의 공기중 분위기에서 20∼60분 건조한다.The heat treatment is dried for 20 to 60 minutes in an air atmosphere at 120 to 300 ℃.
후처리 코팅 및 열처리를 실시하면, 세라믹 코팅층 기공 속에 금속알콕사이드로 합성된 졸이 침투하여 기공을 충진시키고, 세라믹 코팅층 표면에는 졸을 결합제로 BN 분말이 분산되어 있는 후처리 코팅층을 형성한다. 세라믹 코팅층의 요구 경도와 후처리 코팅층의 두께에 따라 습식코팅 및 열처리를 반복적으로 실시한다.After the post-treatment coating and heat treatment, the sol synthesized with the metal alkoxide penetrates into the pores of the ceramic coating layer to fill the pores, and the post-treatment coating layer in which the BN powder is dispersed with the sol as a binder is formed on the surface of the ceramic coating layer. The wet coating and heat treatment are repeatedly performed according to the required hardness of the ceramic coating layer and the thickness of the aftertreatment coating layer.
이렇게 후처리된 코팅층은 금속알콕사이드 졸이 세라믹 코팅층의 경도를 향상시키는 동시에 후처리 코팅층 표면의 BN 분말이 스트립과의 윤활성을 증대시킨다. 또한 후처리 코팅층은 700℃ 이상의 내열성을 가지므로 도금 포트 내에서 열에 의한 손상을 적게 한다.In the post-treated coating layer, the metal alkoxide sol improves the hardness of the ceramic coating layer while the BN powder on the surface of the post-treatment coating layer increases the lubricity with the strip. In addition, the post-treatment coating layer has heat resistance of 700 ° C. or higher, thereby reducing heat damage in the plating port.
이하, 본 발명을 실시예를 통하여 구체적으로 설명한다.Hereinafter, the present invention will be described in detail through examples.
길이 90mm, 폭 40mm, 두께 3mm의 후판재를 사용하여 WC-Co를 플라즈마 용사법으로 세라믹 코팅한 시편을 제작한다. 또한 후처리 코팅재로 표 1과 같이 비교재 1∼11과 발명재 1∼11을 합성한다.Using a thick plate material having a length of 90 mm, a width of 40 mm, and a thickness of 3 mm, a specimen was prepared by ceramic coating of WC-Co by plasma spraying. In addition, Comparative Materials 1 to 11 and Inventive Materials 1 to 11 are synthesized as a post-treatment coating material.
[표 1] 후처리 코팅재의 조성 (단위 : 중량%)[Table 1] Composition of after-treatment coating material (unit: weight%)
코팅방법은 한쪽 면에 세라믹 코팅층을 형성한 시편의 상부를 약 80℃ 이상에서 건조시킨 후 상온으로 냉각된 시편을 사용하여 표 1에 개시된 바와 같이 조성된 후처리 코팅재를 습식 코팅한다. 그리고 상온에서 후처리 코팅재를 일부 건조시킨 후, 120∼300℃ 정도의 공기중 분위기에서 20∼60분 건조시키는 열처리를 한다.In the coating method, the upper part of the specimen having the ceramic coating layer formed on one side thereof is dried at about 80 ° C. or more, and then wet coated with the post-treatment coating material as described in Table 1 using the specimen cooled to room temperature. After partially drying the post-treatment coating material at room temperature, heat treatment is performed for 20 to 60 minutes in an air atmosphere at about 120 to 300 ° C.
상온 공기중에 시편을 방치한 후, 시편의 온도가 상온 근처에서 유지되면, 재차 후처리 코팅재를 습식 코팅한 후, 상기 조건으로 열처리한다.After leaving the specimen in room temperature air, if the temperature of the specimen is maintained near room temperature, the post-treatment coating material is wet coated again, and then heat treated under the above conditions.
이러한 방법으로 후처리 코팅을 3회 실시한 결과는 표 2에 개시되어 있다.The results of three post-treatment coatings in this manner are shown in Table 2.
[표 2] 후처리 코팅층의 물성[Table 2] Physical properties of the post-treatment coating layer
표 2에서 ○, △, ×는 각각 물성의 양호, 보통, 불량을 나타낸다.In Table 2, (circle), (triangle | delta), and (x) represent the good, normal, and poor physical property, respectively.
비교재 1, 2는 금속알콕사이드가 4, 31로, 비교재 3은 콜로이달 실리카가 41로, 비교재 4, 5는 알콜이 9, 51로, 비교재 6, 7은 물이 4, 26으로, 비교재 8, 9는 촉매가 0.2, 6으로, 그리고 비교재 10, 11은 BN 분말이 4, 51로, 각 비교재의 조성물 중 하나가 본 발명의 허용 범위를 벗어난다. 따라서 비교재 1∼11은 용액안정성과 도포성, 세라믹 코팅층 경도, 그리고 후처리 코팅층의 윤활성 및 밀착성 모두를 동시에 만족시키지는 못한다.Comparative materials 1 and 2 had metal alkoxides of 4 and 31, and comparative materials 3 had colloidal silica of 41, comparative materials 4 and 5 with alcohols 9 and 51, and comparative materials 6 and 7 with water 4 and 26. , Comparative materials 8 and 9 have catalysts of 0.2 and 6, and Comparative materials 10 and 11 have BN powders of 4 and 51, one of the compositions of each comparative material is outside the acceptable range of the present invention. Therefore, Comparative Materials 1 to 11 do not simultaneously satisfy both solution stability, applicability, ceramic coating layer hardness, and lubricity and adhesion of the aftertreatment coating layer.
그러나 발명재 1∼11은 금속알콕사이드(Si-, Zr-, Ti-, Al-알콕사이드)가 5∼30, 콜로이달 실리카가 0∼40, 알콜이 10∼50, 물이 5∼25, 촉매가 0.3∼5, 그리고 BN 분말이 5∼50으로 각각 본 발명의 허용 범위 내에 존재하기 때문에 상기와 같은 요구 물성을 모두 만족시킨다.However, the inventive materials 1 to 11 have 5 to 30 metal alkoxides (Si-, Zr-, Ti- and Al-alkoxides), 0 to 40 colloidal silica, 10 to 50 alcohols, 5 to 25 water, and 5 to 25 catalysts. Since 0.3-5 and BN powder are 5-50 each within the permissible range of this invention, all the said required physical properties are satisfy | filled.
한편, 발명재 1∼11이라 할지라도 120∼300℃ 공기중 분위기에서 20∼60분 건조시키는 열처리 이외의 조건에서는 후처리 코팅층을 형성하지 못하였다.On the other hand, even after the invention materials 1 to 11, the post-treatment coating layer could not be formed under conditions other than the heat treatment for drying for 20 to 60 minutes in an air atmosphere at 120 to 300 ° C.
상술한 바와 같이, 본 발명은 세라믹 코팅층의 기공을 금속알콕사이드로 충진하기 때문에 세라믹 코팅층의 경도 및 내구성을 향상시키는 동시에 세라믹 코팅층 표면에 BN 분말이 함유된 후처리 코팅층을 형성하기 때문에 포트 롤에 용융아연의 부착을 억제하고 스트립과의 윤활성을 향상시킬 수 있다.As described above, the present invention improves the hardness and durability of the ceramic coating layer because the pores of the ceramic coating layer are filled with metal alkoxides, and at the same time forms a post-treatment coating layer containing BN powder on the surface of the ceramic coating layer. It is possible to suppress the adhesion of and to improve the lubricity with the strip.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6029457A (en) * | 1983-07-29 | 1985-02-14 | Nippon Steel Corp | Member with high corrosion resistance immersed in hot galvanizing bath |
| JPH07268594A (en) * | 1994-02-10 | 1995-10-17 | Sumitomo Metal Ind Ltd | Member for immersion in hot dip metal coating bath and its production |
| KR100273896B1 (en) * | 1998-05-28 | 2000-12-15 | 박건서 | Ceramic plasma spray coating method for sink roll and stabilizing roll |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6029457A (en) * | 1983-07-29 | 1985-02-14 | Nippon Steel Corp | Member with high corrosion resistance immersed in hot galvanizing bath |
| JPH07268594A (en) * | 1994-02-10 | 1995-10-17 | Sumitomo Metal Ind Ltd | Member for immersion in hot dip metal coating bath and its production |
| KR100273896B1 (en) * | 1998-05-28 | 2000-12-15 | 박건서 | Ceramic plasma spray coating method for sink roll and stabilizing roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010017224A (en) * | 1999-08-09 | 2001-03-05 | 신현준 | Sealing material and method for the thermal spray coating used in a molten metal |
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