JPH0366462A - Zirconia-carbon quality submerged nozzle for continuous casting - Google Patents
Zirconia-carbon quality submerged nozzle for continuous castingInfo
- Publication number
- JPH0366462A JPH0366462A JP1199908A JP19990889A JPH0366462A JP H0366462 A JPH0366462 A JP H0366462A JP 1199908 A JP1199908 A JP 1199908A JP 19990889 A JP19990889 A JP 19990889A JP H0366462 A JPH0366462 A JP H0366462A
- Authority
- JP
- Japan
- Prior art keywords
- zirconia
- continuous casting
- unstabilized
- nozzle
- less
- 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.)
- Pending
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 16
- 230000004907 flux Effects 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 229910002076 stabilized zirconia Inorganic materials 0.000 claims abstract description 5
- 239000000057 synthetic resin Substances 0.000 claims abstract description 5
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000004901 spalling Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- -1 pinch Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は鋼の連続鋳造に用いられる浸漬ノズルのフラッ
クスライン付近の材質に関するものであ〔従来の技術〕
鋼の連続鋳造に用いられるノズルはアルミナ炭素質原料
を主体にし、特にフラックスに接する溶損の著しい部分
にはジルコニア−炭素質原料が使用されている。このジ
ルコニア−炭素質原料には従来、安定化ジルコニアを主
体に使用されている。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a material near the flux line of a submerged nozzle used in continuous casting of steel. [Prior Art] A nozzle used in continuous casting of steel is The alumina carbonaceous raw material is used as the main material, and the zirconia-carbonaceous raw material is used especially in the parts that are in contact with the flux and are subject to significant erosion. Conventionally, stabilized zirconia has been mainly used as the zirconia-carbonaceous raw material.
上記安定化ジルコニアはフラックスによる膜安定化と細
粒化による損耗があり、充分な耐蝕性が得られなかった
。また、未安定化ジルコニアを使用した場合、弾性率が
１５〜２５Ｘ１０’ｋｇｆ／Ｃ１１！と高い値になり、
結果として耐熱スポーリング性に劣り、使用中に折損す
るという問題があり、従って、未安定化ジルコニアを使
用したノズルは実用化されていない。The above-mentioned stabilized zirconia suffered from wear due to film stabilization due to flux and grain refinement, and sufficient corrosion resistance could not be obtained. Moreover, when unstabilized zirconia is used, the elastic modulus is 15 to 25X10'kgf/C11! becomes a high value,
As a result, there are problems with poor heat spalling resistance and breakage during use, and therefore, nozzles using unstabilized zirconia have not been put into practical use.
本発明は弾性率を８〜１５Ｘ１０’ｋｇｆ／情２に低く
し、結果として耐熱スポーリング性を向上させた、未安
定化ジルコニア使用の連続鋳造用ノズルを提供すること
を目的とする。An object of the present invention is to provide a continuous casting nozzle using unstabilized zirconia, which has a low elastic modulus of 8 to 15 x 10' kgf/2 and has improved heat spalling resistance as a result.
本発明では上記目的を達成するために、未安定化ジルコ
ニア５０〜７０％、安定化ジルコニア１０〜３０％、炭
素７〜２５％、炭化珪素１〜２０％、金属シリコン１〜
５％、合成樹脂６〜２０％を使用する。特に未安定化ジ
ルコニアは粒径４４μｍ以下が２０〜４０％で、且つ０
．５μｍ以下が５〜２５％の微粉を使用するようにして
いる。In order to achieve the above object, the present invention contains 50 to 70% unstabilized zirconia, 10 to 30% stabilized zirconia, 7 to 25% carbon, 1 to 20% silicon carbide, and 1 to 10% metallic silicon.
5%, synthetic resin 6-20%. In particular, unstabilized zirconia has a particle size of 44 μm or less in 20 to 40% and 0.
．． I try to use 5 to 25% fine powder with a particle size of 5 μm or less.
未安定化ジルコニアの量は５０％以下になっても７０％
以上になってもノズルの耐蝕性が劣る。Even if the amount of unstabilized zirconia is less than 50%, it remains 70%.
Even if the temperature exceeds this level, the corrosion resistance of the nozzle is still poor.
未安定化ジルコニアの中、微粉を１０〜５０％使用し、
このうち粒径４４μｍ以下の微粉を２０〜４０％で、且
つ粒径０．５μｍ以下の微粉を５〜２５％使用しなけれ
ばいけない。微粉の使用量が１０％以下では強度が低く
、５０％以上では焼成収縮率が大きくなる。更に、４４
μｍ以下の粒径の微粉が２０％以下になると耐熱スポー
リング性に劣り、４０％以上になると強度が低くなる。Using 10-50% fine powder in unstabilized zirconia,
Of these, 20 to 40% of the powder must have a particle size of 44 μm or less, and 5 to 25% of the powder must have a particle size of 0.5 μm or less. If the amount of fine powder used is less than 10%, the strength will be low, and if it is more than 50%, the firing shrinkage will be large. Furthermore, 44
If the content of fine powder with a particle size of μm or less is less than 20%, the heat spalling resistance will be poor, and if it is more than 40%, the strength will be low.
０゜５μｍ以下の粒径の微粉の使用量が５％以下になる
と強度が低くなり、２５％以上になると耐熱スポーリン
グ性が劣る。If the amount of fine powder with a particle size of 0.5 μm or less is less than 5%, the strength will be low, and if it is more than 25%, the heat spalling resistance will be poor.
炭素は、例えば鱗状黒鉛、玉状黒鉛、電極屑など天然、
人工を問わず使用できるが、特に鱗状黒鉛が好ましい。Carbon can be found in natural sources such as scale graphite, globular graphite, electrode scraps, etc.
Although any artificial material can be used, flaky graphite is particularly preferred.
その使用量は７％以下になると耐熱スポーリング性に劣
り、２５％以上になると耐蝕性が劣る。炭化珪素は１〜
２０％必要である。If the amount used is less than 7%, the heat spalling resistance will be poor, and if it is more than 25%, the corrosion resistance will be poor. Silicon carbide is 1~
20% is required.
その使用量が１％以下では酸化防止の効果がなく、２０
％以上になると耐蝕性が劣る。金属シリコンは１〜５％
必要である。その使用量が１％以下では酸化防止の効果
がな（，５％以上になると耐蝕性が劣る。合成樹脂はフ
ェノール樹脂、フラン樹脂、ピンチ、ポリプロピレン等
が使用できるが、フェノール樹脂が好ましい。この合成
樹脂は６〜２０％必要である。その使用量が６％以下で
は強度が低くなり、２０％以上では焼成収縮率が大きく
なる。If the amount used is less than 1%, there is no antioxidant effect;
% or more, corrosion resistance deteriorates. Metallic silicon is 1-5%
is necessary. If the amount used is less than 1%, there is no antioxidant effect (and if it is more than 5%, the corrosion resistance is poor.As the synthetic resin, phenol resin, furan resin, pinch, polypropylene, etc. can be used, but phenol resin is preferable. The amount of synthetic resin required is 6 to 20%. If the amount used is less than 6%, the strength will be low, and if it is more than 20%, the firing shrinkage rate will be large.
第 １ 表 〔実施例〕 実施例を第１表に示す。Part 1 table 〔Example〕 Examples are shown in Table 1.
第１表に示す本願発明品ｌ〜３は未安定化ジルコニアの
粒径４４μｍ以下の微粉が２０〜４０％で、且つ粒径０
．５μｍ以下の微粉を５〜２５％使用している。比較別
品２は未安定化ジルコニアの粒径が４４μｍ以下の微粉
を５％で、且つ粒径０．５μｍ以下の微粉を２８％使用
している。第１表に示す通り未安定化のジルコニアの微
粉の粒度を本発明の範囲内のものを使用すると耐熱スポ
ーリング性に優れていることが判る。また、未安定化ジ
ルコニアの使用量は多くても少なくても耐蝕性に劣るこ
とが判る。Inventive products 1 to 3 shown in Table 1 contain 20 to 40% fine powder of unstabilized zirconia with a particle size of 44 μm or less, and have a particle size of 0.
．． 5 to 25% of fine powder with a diameter of 5 μm or less is used. Comparative product 2 uses 5% of unstabilized zirconia fine powder with a particle size of 44 μm or less and 28% of fine powder with a particle size of 0.5 μm or less. As shown in Table 1, it can be seen that when the particle size of unstabilized zirconia fine powder is within the range of the present invention, the heat spalling resistance is excellent. Furthermore, it is found that the corrosion resistance is inferior regardless of whether the amount of unstabilized zirconia used is large or small.
艷比較例１を１００として、数字力ＱＪＸさい程耐蝕性
が良い。Taking Comparative Example 1 as 100, the numerical power QJX has better corrosion resistance.
以下余白
〔発明の効果〕
本発明ノズルは未安定化ジルコニアの微粉を粒度調整し
て配合しているので、耐熱スポーリング性、耐蝕性とも
に優れており、連Ｖｔ鋳造を安定して行うことができ、
高耐用性を示すことができる。Margins below [Effects of the Invention] Since the nozzle of the present invention is blended with unstabilized zirconia fine powder with adjusted particle size, it has excellent heat spalling resistance and corrosion resistance, and can stably perform continuous Vt casting. I can,
Can exhibit high durability.
Claims (1)
分にジルコニア−炭素質原料を使用した連続鋳造用ノズ
ルにおいて、 炭素７〜２５％、未安定化ジルコニア５０〜７０％、安
定化ジルコニア１０〜３０％、炭化珪素１〜２０％、金
属シリコン１〜５％、合成樹脂６〜２０％からなり、未
安定化ジルコニアは１０〜５０％が微粉であり、このう
ち粒径４４μｍ以下が２０〜４０％で、且つ、粒径０．
５μｍ以下が５〜２５％使用する事を特徴とするジルコ
ニア−炭素質連続鋳造用浸漬ノズル。[Scope of Claims] [1] A continuous casting nozzle in which a zirconia-carbonaceous raw material is used in the part of the continuous casting immersion nozzle that comes into contact with flux, which contains 7 to 25% carbon, 50 to 70% unstabilized zirconia, and stable It consists of 10 to 30% stabilized zirconia, 1 to 20% silicon carbide, 1 to 5% metal silicon, and 6 to 20% synthetic resin, and 10 to 50% of unstabilized zirconia is fine powder, of which particle size is 44 μm or less. is 20 to 40%, and the particle size is 0.
A zirconia-carbonaceous continuous casting immersion nozzle characterized in that 5 to 25% of particles of 5 μm or less are used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1199908A JPH0366462A (en) | 1989-07-31 | 1989-07-31 | Zirconia-carbon quality submerged nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1199908A JPH0366462A (en) | 1989-07-31 | 1989-07-31 | Zirconia-carbon quality submerged nozzle for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366462A true JPH0366462A (en) | 1991-03-22 |
Family
ID=16415605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1199908A Pending JPH0366462A (en) | 1989-07-31 | 1989-07-31 | Zirconia-carbon quality submerged nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366462A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100774918B1 (en) * | 2006-12-14 | 2007-11-09 | 조선내화 주식회사 | Refractories for continuos casting |
| JP2011512313A (en) * | 2008-02-18 | 2011-04-21 | リフラクトリー インテレクチュアル プロパティ ゲーエムベーハー アンド コー ケージー | Refractory slag belt |
-
1989
- 1989-07-31 JP JP1199908A patent/JPH0366462A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100774918B1 (en) * | 2006-12-14 | 2007-11-09 | 조선내화 주식회사 | Refractories for continuos casting |
| JP2011512313A (en) * | 2008-02-18 | 2011-04-21 | リフラクトリー インテレクチュアル プロパティ ゲーエムベーハー アンド コー ケージー | Refractory slag belt |
| US8809214B2 (en) | 2008-02-18 | 2014-08-19 | Refractory Intellectual Property Gmbh & Co. Kg | Refractory slag band |
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