JP3358040B2 - Nozzle for continuous casting - Google Patents
Nozzle for continuous castingInfo
- Publication number
- JP3358040B2 JP3358040B2 JP20287194A JP20287194A JP3358040B2 JP 3358040 B2 JP3358040 B2 JP 3358040B2 JP 20287194 A JP20287194 A JP 20287194A JP 20287194 A JP20287194 A JP 20287194A JP 3358040 B2 JP3358040 B2 JP 3358040B2
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- refractory material
- powder
- nozzle
- metal
- 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.)
- Expired - Fee Related
Links
- 238000009749 continuous casting Methods 0.000 title claims description 11
- 239000011819 refractory material Substances 0.000 claims description 45
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 43
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 24
- 239000011159 matrix material Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 16
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000011863 silicon-based powder Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- CAVCGVPGBKGDTG-UHFFFAOYSA-N alumanylidynemethyl(alumanylidynemethylalumanylidenemethylidene)alumane Chemical compound [Al]#C[Al]=C=[Al]C#[Al] CAVCGVPGBKGDTG-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000011271 tar pitch Substances 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼の連続鋳造に用いら
れるノズルに関し、特に高い強度が求められるスライデ
ィングノズルや浸漬ノズルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle used for continuous casting of steel, and more particularly to a sliding nozzle and a immersion nozzle which require high strength.
【０００２】[0002]
【従来の技術】連続鋳造用ノズル、例えばスライディン
グノズルのプレートれんがは、溶鋼による急激な熱衝撃
と摩耗の物理的な作用に加え、溶鋼及び溶融スラグによ
る物理的かつ化学的な侵食作用を受けるので、耐スポー
リング性、耐食性及び強度に優れていることが望まれて
いる。従来、かかる要望を満たすため、耐食性の高い電
融のＡｌ2 Ｏ3 （アルミナ）やＺｒＯ2 （ジルコニア）
等を用いた、Ａｌ2 Ｏ3 −ＺｒＯ2 質ノズル（特公昭６
１−２６２０号公報参照）やＡｌ2 Ｏ3 −ＺｒＯ2 −Ｓ
ｉＯ2 （シリカ）質ノズル（特公平１−３０７８４号公
報参照）が知られている。2. Description of the Related Art Plate bricks for continuous casting nozzles, such as sliding nozzles, are subject to physical and chemical erosion by molten steel and molten slag in addition to the physical effects of rapid thermal shock and wear by molten steel. It is desired to have excellent spalling resistance, corrosion resistance and strength. Conventionally, in order to satisfy such a demand, electrofused Al 2 O 3 (alumina) or ZrO 2 (zirconia) having high corrosion resistance is used.
Al 2 O 3 -ZrO 2 quality nozzle (Japanese Patent Publication No. Sho 6
1-2620 No. see Japanese) and Al 2 O 3 -ZrO 2 -S
An iO 2 (silica) type nozzle (see Japanese Patent Publication No. 1-30784) is known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、電融の
アルミナやジルコニアを用いたＡｌ2 Ｏ3 −ＺｒＯ2 質
又はＡｌ2 Ｏ3 −ＺｒＯ2 −ＳｉＯ2 質ノズルは、耐ス
ポーリング性や耐食性に優れているものの、電融アルミ
ナや電融ジルコニアは反応性に乏しいために、焼結性が
悪い不具合がある。その結果、得られるノズルは、連続
鋳造用として十分な強度を得難いという課題がある。そ
こで、本発明は、十分な強度をも得ることができる連続
鋳造用ノズルを提供することを目的とする。However, an Al 2 O 3 -ZrO 2 or Al 2 O 3 -ZrO 2 -SiO 2 quality nozzle using electrofused alumina or zirconia has poor spalling and corrosion resistance. Although excellent, electrofused alumina and electrofused zirconia have poor reactivity and thus have poor sinterability. As a result, the obtained nozzle has a problem that it is difficult to obtain sufficient strength for continuous casting. Therefore, an object of the present invention is to provide a continuous casting nozzle capable of obtaining sufficient strength.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するた
め、本発明の連続鋳造用ノズルは、Ａｌ2 Ｏ3 ４０〜９
０重量％、ＺｒＯ2 ０〜５０重量％、ＳｉＯ2 １０〜４
０重量％の化学組成を有し、α−アルミナ、ムライト、
単斜晶ジルコニア及びガラス相の中の１〜３相から形成
される電融耐火材料にアルミニウム又はその合金を反応
させて得られるアルミナ及び金属又はアルミナ、ジルコ
ニア及び金属で構成され、組織の中に微細に分散する金
属を含む耐火材料１０〜８０重量％からなる骨材、残部
焼結アルミナ粉末を主成分とするマトリックス材を、混
練、成形、焼成してなることを特徴とする。前記金属
は、珪素とアルミニウムである。又、前記マトリックス
材は、焼結アルミナ粉末のみの他、焼結アルミナ粉末に
炭素粉末及び／又は珪素粉末を加えたものからなる。In order to solve the above-mentioned problems, a continuous casting nozzle according to the present invention is characterized in that Al 2 O 3 40-9.
0 wt%, ZrO 2 0 to 50 wt%, SiO 2 10 to 4
Having a chemical composition of 0% by weight, α-alumina, mullite,
It is composed of alumina and metal or alumina, zirconia and metal obtained by reacting aluminum or its alloy with an electrofused refractory material formed from monoclinic zirconia and 1 to 3 phases in a glass phase, and has a structure It is characterized in that an aggregate composed of 10 to 80% by weight of a refractory material containing finely dispersed metal and a matrix material mainly composed of sintered alumina powder are kneaded, molded and fired. The metals are silicon and aluminum. Further, the matrix material is made of a sintered alumina powder to which a carbon powder and / or a silicon powder are added in addition to the sintered alumina powder.
【０００５】[0005]
【作用】本発明の連続鋳造用ノズルにおいては、電融耐
火材料にアルミニウム又はその合金を反応させて得られ
る耐火材料の２次アルミナ及び金属が初生のアルミナ及
びジルコニアに比べて活性に富み、マトリックス材と活
発に焼結する。すなわち、ＳｉＯ2 を１０〜４０重量％
含む電融耐火材料として、上記Ａｌ2Ｏ3 −ＺｒＯ2 −
ＳｉＯ2 系、Ａｌ2 Ｏ3 −ＳｉＯ2 系のものが知られて
いる。これらの耐火材料の組織の中で、ＳｉＯ2 はアル
ミナ又はジルコニアの粒界相を埋めるガラス相、又はム
ライト結晶相として存在している。上記電融耐火材料を
溶融したアルミニウムと接触させると、次の反応によっ
て電融耐火材料の内部のＳｉＯ2 成分を含む領域におい
てＡｌ2 Ｏ3 とＳｉ（珪素）が生成される。In the continuous casting nozzle of the present invention, the secondary alumina and metal of the refractory material obtained by reacting aluminum or its alloy with the electrofused refractory material are more active than primary alumina and zirconia, Actively sinters with the material. That is, 10 to 40% by weight of SiO 2
Al 2 O 3 —ZrO 2 —
SiO 2 and Al 2 O 3 —SiO 2 are known. In the structure of these refractory materials, SiO 2 exists as a glass phase that fills the grain boundary phase of alumina or zirconia, or a mullite crystal phase. When the above-mentioned electrofused refractory material is brought into contact with the molten aluminum, Al 2 O 3 and Si (silicon) are generated in the region containing the SiO 2 component inside the electrofused refractory material by the following reaction.
【０００６】[0006]
【化１】 Embedded image
【０００７】この反応は、体積の減少を伴い、反応で生
成する空隙には、アルミニウムが供給されて充填され
る。珪素とアルミニウムを合わせた金属の量は、最初に
存在したＳｉＯ2 分のおよそ３０重量％程度である。以
上の結果、アルミナ及び金属又はアルミナ、ジルコニア
及び金属で構成される耐火材料が得られる。金属は、粒
径又は径がサブミクロン〜数ミクロンの粒状又は柱状の
形態で生成したアルミナ中に分散している。[0007] This reaction involves a reduction in volume, and the voids generated by the reaction are supplied and filled with aluminum. The amount of the combined metal of silicon and aluminum is about 30% by weight of the initially present SiO 2 . As a result, a refractory material composed of alumina and metal or alumina, zirconia and metal is obtained. The metal is dispersed in the alumina formed in a granular or columnar form with a particle size or diameter ranging from submicron to several microns.
【０００８】上記耐火材料の製造は、電融耐火材料を溶
融アルミニウムに浸漬したり、電融耐火材料の上に溶融
アルミニウムを注湯したり、又は電融耐火材料とアルミ
ニウムの混合物を加熱したりして反応を起こさせて行
う。溶融アルミニウムの温度又は混合物の加熱温度は、
８００〜１２００℃が適当である。The refractory material is manufactured by dipping the electrofused refractory material into molten aluminum, pouring the molten aluminum over the electrofused refractory material, or heating a mixture of the electrofused refractory material and aluminum. To cause a reaction. The temperature of the molten aluminum or the heating temperature of the mixture is
800-1200 ° C is suitable.
【０００９】上述したようにして製造した耐火材料は、
その表面に金属及び反応で生成した２次アルミナが露出
した領域を有している。この領域は、当該耐火材料の骨
格をなす初生のアルミナ及びジルコニアに比べて活性に
富んでおり、ノズルの骨材として使用した場合には、マ
トリックス材と活発に焼結して強固な焼結組織を形成す
ることができるものである。上記骨材とマトリックス材
からなる成形体の焼成に当り、酸化性雰囲気下では、金
属の酸化により生成するアルミナ及び２次アルミナを介
して骨材がマトリックス材と強固に焼結する。又、窒化
性雰囲気下では、金属の窒化生成物である窒化アルミニ
ウム、窒化珪素が生成して骨材とマトリックス材との結
合が強固になる。更に、マトリックス材がカーボンを含
有するものにおいては、金属がマトリックス材中のカー
ボンと反応して炭化珪素、及び炭化アルミニウムを生成
して化学的な結合を形成する。このように、上記耐火材
料は、その表面に金属及び反応で生成した２次アルミナ
が露出した活性に富んだ領域を有しているので、電融耐
火材料に比べてマトリックス材との結合を作り易い。な
お、耐火材料の製造に際して表面に付着したアルミニウ
ムも、結合性を高める上で効果がある。The refractory material manufactured as described above is
The surface has a region where metal and secondary alumina generated by the reaction are exposed. This region is more active than the original alumina and zirconia that form the skeleton of the refractory material, and when used as an aggregate for a nozzle, it actively sinters with the matrix material and has a strong sintered structure. Can be formed. In firing the formed body composed of the aggregate and the matrix material, the aggregate is strongly sintered with the matrix material through alumina and secondary alumina generated by oxidation of the metal under an oxidizing atmosphere. Further, in a nitriding atmosphere, aluminum nitride and silicon nitride, which are the products of metal nitridation, are formed, and the bond between the aggregate and the matrix material is strengthened. Further, when the matrix material contains carbon, the metal reacts with the carbon in the matrix material to form silicon carbide and aluminum carbide to form a chemical bond. As described above, since the refractory material has an active region where the metal and the secondary alumina generated by the reaction are exposed on the surface, the refractory material forms a bond with the matrix material as compared with the electrofused refractory material. easy. It should be noted that aluminum attached to the surface during the production of the refractory material is also effective in increasing the bonding property.
【００１０】前記耐火材料は、出発原料の電融耐火材料
に由来するアルミナ（初生のアルミナ）を骨格にして構
成されるものである。従って、初生のアルミナの量が減
少すると、当該耐火材料の強度が低下し、ノズルとして
の強度が低下する。電融耐火材料中のＡｌ2 Ｏ3 量が４
０重量％未満であると耐火材料の強度が低下し、９０重
量％を超えると必要なＳｉＯ2 量が減少する。電融耐火
材料中のＳｉＯ2 量が１０重量％未満であると金属及び
２次生成アルミナの生成量が少なくなって耐火材料の反
応性を活用し難くなり、４０重量％を超えると金属の生
成量が多過ぎてノズルの熱間強度が低下する。又、電融
耐火材料中のＺｒＯ2 は、耐火材料の耐食性を高める上
で有利であるが、ＺｒＯ2 量が５０重量％を超えると必
要なＡｌ2 Ｏ3 及びＳｉＯ2 量が得られない。The refractory material has a skeleton of alumina (primary alumina) derived from an electrofused refractory material as a starting material. Therefore, when the amount of primary alumina decreases, the strength of the refractory material decreases, and the strength of the nozzle decreases. Al 2 O 3 content in the electrofused refractory material is 4
If the amount is less than 0% by weight, the strength of the refractory material decreases, and if it exceeds 90% by weight, the necessary amount of SiO 2 decreases. If the amount of SiO 2 in the electrofused refractory material is less than 10% by weight, the amount of metal and secondary alumina produced is reduced, making it difficult to utilize the reactivity of the refractory material. The amount is too large and the hot strength of the nozzle decreases. Further, ZrO 2 in the electrofused refractory material is advantageous in enhancing the corrosion resistance of the refractory material, but when the amount of ZrO 2 exceeds 50% by weight, the required amounts of Al 2 O 3 and SiO 2 cannot be obtained.
【００１１】上述した耐火材料を骨材としてノズルを製
造するには、耐火材料１０〜８０重量％からなる骨材
を、残部焼結アルミナ粉末を主成分とするマトリックス
材と混合し、この混合物にフェノール樹脂、フラン樹
脂、ＰＶＡ、リグニン等のバイダーを加えて混練し、混
練物を金型成形、アイソスタテックプレス成形等で所要
のノズル形状に成形した後焼成する。更に、必要に応じ
て樹脂、タール・ピッチ等を含浸させる。骨材の配合量
が１０重量％未満であると前述した耐火材料の特性が生
かされず、８０重量％を超えるとマトリックス材の割合
が減少してノズルとしての強度の発現が困難になる。マ
トリックス材としては、焼結アルミナ粉末のみ、焼結ア
ルミナ粉末に炭素粉末及び／又は珪素粉末を加えたもの
が用いられる。焼成雰囲気としては、マトリックス材に
応じて酸化性雰囲気、窒化性雰囲気又は大気中における
コークスブリーズ埋設雰囲気が適用される。In order to manufacture a nozzle using the above-mentioned refractory material as an aggregate, an aggregate composed of 10 to 80% by weight of the refractory material is mixed with a matrix material mainly composed of sintered alumina powder, and the mixture is mixed with the mixture. A binder such as a phenol resin, a furan resin, PVA, and lignin is added and kneaded. The kneaded product is molded into a required nozzle shape by die molding, isostatic press molding, and then fired. Further, if necessary, a resin, tar pitch, or the like is impregnated. If the amount of the aggregate is less than 10% by weight, the above-mentioned characteristics of the refractory material cannot be utilized. If the amount exceeds 80% by weight, the ratio of the matrix material decreases, and it becomes difficult to develop the strength as a nozzle. As the matrix material, only sintered alumina powder, or a material obtained by adding carbon powder and / or silicon powder to sintered alumina powder is used. As the firing atmosphere, an oxidizing atmosphere, a nitriding atmosphere, or a coke breeze burying atmosphere in the air is applied depending on the matrix material.
【００１２】[0012]
【実施例】以下、本発明の実施例について比較例と共に
説明する。まず、表１に示すように、種々の化学組成を
有するＡｌ2 Ｏ3 −ＺｒＯ2 −ＳｉＯ2 系、Ａｌ2 Ｏ3
−ＳｉＯ2 系及びＡｌ2 Ｏ3 −ＺｒＯ2 系の電融耐火材
料粉末を用い、これらの電融耐火材料粉末を溶融アルミ
ニウムに浸漬して表２に示す耐火材料粉末Ａ〜Ｉを得
た。Hereinafter, examples of the present invention will be described together with comparative examples. First, as shown in Table 1, Al 2 O 3 —ZrO 2 —SiO 2 system having various chemical compositions, Al 2 O 3
A powder of refractory material A to I shown in Table 2 was obtained by immersing the powder of refractory material of -SiO 2 type and Al 2 O 3 -ZrO 2 type in molten aluminum.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】耐火材料粉末Ｈは、電融耐火材料粉末中の
Ａｌ2 Ｏ3 の含有量が少な過ぎて大きな単粒子圧壊強度
が得られず、又、耐火材料粉末Ｉは、ＳｉＯ2 が含有さ
れていないので、アルミニウムと反応しなかった。In the refractory material powder H, the content of Al 2 O 3 in the electrofused refractory material powder is too small to obtain a large single particle crushing strength, and the refractory material powder I contains SiO 2. Did not react with aluminum.
【００１６】次いで、表３〜表５に示すように、耐火材
料Ｂ、Ｄ、Ｅ及びＦ２０〜６０重量％を骨材とし、かつ
焼結アルミナ粉末４０〜８０重量％のみ又は焼結アルミ
ナ粉末５０〜７０重量％、炭素粉末７重量％及び珪素粉
末３重量％をマトリックス材として混合し、この混合物
にフェノール樹脂２〜５重量％（外率）をバインダーと
して加えて混練し、成形した後焼成して試料１〜試料１
８を製造した。又、電融アルミナ粉末、電融耐火材料粉
末Ｎｏ．９又は電融耐火材料粉末Ｎｏ．２ ４０重量％
を骨材とし、かつ焼結アルミナ粉末６０重量％のみ又は
焼結アルミナ粉末５０重量％、炭素粉末７重量％及び珪
素粉末３重量％をマトリックス材として混合し、この混
合物にフェノール樹脂２〜５重量％（外率）をバインダ
ーとして加えて混練し、成形した後焼成して比較例１〜
比較例６を得た。得られた試料１〜１８及び比較例１〜
６の曲げ強さは、表３〜５に示すようになった。Next, as shown in Tables 3 to 5, 20 to 60% by weight of the refractory materials B, D, E and F were used as aggregates, and only 40 to 80% by weight of the sintered alumina powder or 50 ７０70% by weight, carbon powder 7% by weight and silicon powder 3% by weight were mixed as a matrix material, and 2 to 5% by weight (external ratio) of a phenol resin was added as a binder to the mixture, kneaded, molded, and fired. Sample 1 to sample 1
8 was produced. Also, the fused alumina powder, the fused refractory material powder No. 9 or electrofused refractory material powder No. 9 2 40% by weight
Is used as an aggregate, and only 60% by weight of sintered alumina powder or 50% by weight of sintered alumina powder, 7% by weight of carbon powder and 3% by weight of silicon powder are mixed as a matrix material. % (External ratio) as a binder, kneaded, molded and fired.
Comparative Example 6 was obtained. Obtained Samples 1 to 18 and Comparative Examples 1 to
The bending strength of No. 6 was as shown in Tables 3 to 5.
【００１７】[0017]
【表３】 [Table 3]
【００１８】[0018]
【表４】 [Table 4]
【００１９】[0019]
【表５】 [Table 5]
【００２０】表３〜５から、本発明に係るものは、従来
のものの約１．７〜２倍の曲げ強さを有していることが
わかる。From Tables 3 to 5, it can be seen that the one according to the present invention has a bending strength about 1.7 to 2 times that of the conventional one.
【００２１】なお、上記実施例においては、電融耐火材
料にアルミニウムを反応させて得た耐火材料を用いる場
合について述べているが、これに限定されるものではな
く、電融耐火材料にアルミニウム合金を反応させて得た
耐火材料を用いてもよいものである。又、マトリックス
材として焼結アルミナ粉末のみ又は焼結アルミナ粉末、
炭素粉末及び珪素粉末を用いる場合に限らず、焼結アル
ミナ粉末及び炭素粉末又は焼結アルミナ粉末及び珪素粉
末をマトリックス材として用いてもよい。In the above embodiment, the case where a refractory material obtained by reacting aluminum with an electrofused refractory material is used is described. However, the present invention is not limited to this. May be used to obtain a refractory material. Also, only sintered alumina powder or sintered alumina powder as a matrix material,
The present invention is not limited to the case where the carbon powder and the silicon powder are used, and the sintered alumina powder and the carbon powder or the sintered alumina powder and the silicon powder may be used as the matrix material.
【００２２】[0022]
【発明の効果】以上説明したように、本発明の連続鋳造
用ノズルによれば、電融耐火材料にアルミニウム又はそ
の合金を反応させて得られる耐火材料の２次アルミナ及
び金属が初生のアルミナ及びジルコニアに比べて活性に
富み、マトリックス材と活発に焼結するので、従来に比
して強度を十分なものとすることができる。As described above, according to the continuous casting nozzle of the present invention, the secondary alumina and the metal of the refractory material obtained by reacting aluminum or its alloy with the electrofused refractory material are the same as those of primary alumina and Since it is more active than zirconia and actively sinters with the matrix material, it can have a sufficient strength as compared with the prior art.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０４Ｂ 35/103 Ｃ０４Ｂ 35/10 Ｆ 35/66 Ｇ (56)参考文献 特開 平４−37453（ＪＰ，Ａ) 特開 平５−50197（ＪＰ，Ａ) 特開 平４−344857（ＪＰ，Ａ) 特開 昭60−51660（ＪＰ，Ａ) 特開 昭61−101453（ＪＰ，Ａ) 特開 昭60−96567（ＪＰ，Ａ) 特公 平１−30784（ＪＰ，Ｂ２) 特公 昭61−2620（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B22D 11/10 330 B22D 11/10 340 B22D 41/32 B22D 41/54 C04B 35/101 C04B 35/103 C04B 35/66 ────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI C04B 35/103 C04B 35/10 F 35/66 G (56) References JP-A-4-37453 (JP, A) JP-A 5-50197 (JP, A) JP-A-4-344857 (JP, A) JP-A-60-51660 (JP, A) JP-A-61-101453 (JP, A) JP-A-60-96567 (JP, A) A) Japanese Patent Publication No. 1-30784 (JP, B2) Japanese Patent Publication No. 61-2620 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) B22D 11/10 330 B22D 11/10 340 B22D 41/32 B22D 41/54 C04B 35/101 C04B 35/103 C04B 35/66
Claims (3)
０〜５０重量％、ＳｉＯ2 １０〜４０重量％の化学組成
を有し、α−アルミナ、ムライト、単斜晶ジルコニア及
びガラス相の中の１〜３相から形成される電融耐火材料
にアルミニウム又はその合金を反応させて得られるアル
ミナ及び金属又はアルミナ、ジルコニア及び金属で構成
され、組織の中に微細に分散する金属を含む耐火材料１
０〜８０重量％からなる骨材、残部焼結アルミナ粉末を
主成分とするマトリックス材を、混練、成形、焼成して
なることを特徴とする連続鋳造用ノズル。1. An Al 2 O 3 content of 40 to 90% by weight, ZrO 2
0-50 wt%, has a chemical composition of SiO 2 10 to 40 wt%, aluminum α- alumina, mullite, the fused refractory material formed from 1-3 phase in the monoclinic zirconia and glass phase Or a refractory material 1 comprising alumina and a metal obtained by reacting an alloy thereof or a metal composed of alumina, zirconia and a metal, and finely dispersed in a structure.
A continuous casting nozzle, which is obtained by kneading, molding, and firing a matrix material mainly composed of 0 to 80% by weight of an aggregate and a balance of sintered alumina powder.
ることを特徴とする請求項１記載の連続鋳造用ノズル。2. The continuous casting nozzle according to claim 1, wherein the metal is silicon and aluminum.
末のみの他、焼結アルミナ粉末に炭素粉末及び／又は珪
素粉末を加えたものからなることを特徴とする請求項１
又は２記載の連続鋳造用ノズル。3. The matrix material according to claim 1, wherein the matrix material is formed by adding carbon powder and / or silicon powder to sintered alumina powder in addition to the sintered alumina powder.
Or the nozzle for continuous casting according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20287194A JP3358040B2 (en) | 1994-08-04 | 1994-08-04 | Nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20287194A JP3358040B2 (en) | 1994-08-04 | 1994-08-04 | Nozzle for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0847755A JPH0847755A (en) | 1996-02-20 |
| JP3358040B2 true JP3358040B2 (en) | 2002-12-16 |
Family
ID=16464582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20287194A Expired - Fee Related JP3358040B2 (en) | 1994-08-04 | 1994-08-04 | Nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3358040B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830932B (en) * | 2017-01-13 | 2020-04-14 | 安徽斯瑞尔阀门有限公司 | Composite powder for hot spraying of gate valve sealing surface and preparation method thereof |
-
1994
- 1994-08-04 JP JP20287194A patent/JP3358040B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0847755A (en) | 1996-02-20 |
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