JPH02255564A - Nozzle for casting stainless steel - Google Patents
Nozzle for casting stainless steelInfo
- Publication number
- JPH02255564A JPH02255564A JP1077742A JP7774289A JPH02255564A JP H02255564 A JPH02255564 A JP H02255564A JP 1077742 A JP1077742 A JP 1077742A JP 7774289 A JP7774289 A JP 7774289A JP H02255564 A JPH02255564 A JP H02255564A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- stainless steel
- graphite
- alumina
- weight
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 8
- 239000010935 stainless steel Substances 0.000 title claims abstract description 8
- 238000005266 casting Methods 0.000 title claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 9
- 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 7
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000005350 fused silica glass Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000004898 kneading Methods 0.000 abstract 1
- 229920001568 phenolic resin Polymers 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 230000035939 shock Effects 0.000 description 5
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
鋼の連続鋳造用ノズルに関し、特にステンレス鋼の鋳造
用ノズルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a nozzle for continuous casting of steel, and in particular to a nozzle for casting of stainless steel.
ダンデイシュからモールドに溶鋼を注入するための連続
鋳造用ノズルにはＡ１１ｚ Ｏｓ −Ｃ（グラフアイト
）系耐火物が用いられるが、これだけでは溶鋼中のＡｌ
、Ｏｓの付着が起こりやすいとともに、耐スポーリング
性に欠けるところから、Ｓｔｏｗ（フユーズドシリカ）
の添加がなされたＡｌ２Ｏ，−３ｉＯ□−Ｃ系耐火物が
用いられている。A11z Os-C (graphite)-based refractory is used for the continuous casting nozzle for injecting molten steel into the mold from the dungeon, but this alone is not enough to reduce the amount of Al in the molten steel.
, Stow (fused silica) is easy to adhere to Os and lacks spalling resistance.
Al2O, -3iO□-C based refractories are used.
しかしながら、上記のようなＡｌ１ｚＣ）＋ ＳｉＯ
□−Ｃ系ノズルをアルミレスステンレス鋼に適用すると
ＳｉＯ□とＣが
Ｓ ｉ Ｏｘ ＋Ｃ−４Ｓ ｉ Ｏｔ ＋ＣＯ↑のよう
に反応して、Ｓｉｎｇの蒸発と炭素の酸化が起こる。こ
れによってノズルに空隙が形成され、この空隙に溶鋼が
浸入し、また浸入した溶鋼が酸化する。このように浸入
した溶鋼中にはＭｎが含まれているため、
Ｓ ｉＯｔ＋２Ｍｎ−＋Ｓ ｉ ＋２Ｍｎ０なる反応を
起こして、更にＳ ｉ Ｏｚが損耗するとともに溶鋼酸
化物（Ｆｅｄ、Ｃｒｚ Ｏ，、Ｍｎ０）によって炭素が
Ｃ＋ （Ｆｅｄ、Ｃｒｚ Ｏｘ 、Ｍｎ０） →ＣＯ＋
（Ｆｅ、 Ｃｒ、Ｍｎ）
なる反応を起こして消失する。このようにしてノズルは
ますます形骸化することになる。However, Al1zC) + SiO as mentioned above
When a □-C system nozzle is applied to aluminum-less stainless steel, SiO□ and C react as SiOx +C-4SiOt +CO↑, causing evaporation of Sing and oxidation of carbon. As a result, a void is formed in the nozzle, into which the molten steel enters, and the infiltrated molten steel is oxidized. Since the molten steel that has penetrated in this way contains Mn, a reaction of S iOt + 2Mn- + S i + 2Mn0 occurs, and the S iOz is further worn out and is destroyed by molten steel oxides (Fed, CrzO, Mn0). Carbon is C+ (Fed, Crz Ox, Mn0) →CO+
(Fe, Cr, Mn) A reaction occurs and disappears. In this way, the nozzle becomes increasingly obsolete.
また、アルミレス鋼以外の鋼に適用した場合とアルミレ
ス鋼に適用した場合とでは第１表に示すように損耗の状
態が著しく異なり、アルミレス鋼特有の問題が浮き掘り
にされている。Furthermore, as shown in Table 1, the state of wear and tear is markedly different when applied to steels other than aluminum-less steel and when applied to aluminum-less steel, highlighting problems unique to aluminum-less steel.
この発明は上記従来の事情に鑑みて提案されたものであ
って、損耗の少ない長時間耐用の可能なアルミレスステ
ンレス鋼鋳造用ノズルを提供することにある。This invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide an aluminum-free stainless steel casting nozzle that can be used for a long time with little wear and tear.
この発明は上記目的を達成するために、黒鉛１０〜３０
重量％、アルミナ６０〜８０重量％、溶融シリカ０〜１
０重量％、その他金属添加物等をバインダーと混練し、
成形後、還元雰囲気にて焼成してなるものである。In order to achieve the above object, this invention
wt%, alumina 60-80 wt%, fused silica 0-1
0% by weight, and other metal additives are kneaded with a binder,
After molding, it is fired in a reducing atmosphere.
アルミナ−黒鉛材質の損耗に及ぼす５ｉｎ２の影響を調
査するために以下に示す損耗テストを行った。The following wear test was conducted to investigate the effect of 5 in 2 on the wear of alumina-graphite material.
第２表に示すＳｉｎ、含有材質試料ＡとＳｉＯ２を含有
しない材質試料Ｂを、第３表に示す反応剤と接触させて
１５００℃で所定時間加熱し、加熱後の試料の損耗量を
測定した。損耗量を加熱時間に対しプロットし、第１図
に示す。この第１図から明らかなように、ノズル材にＳ
ｉｎ、を含有させないことにより損耗量が低減されるこ
とが判明した。The Sin-containing material sample A shown in Table 2 and the material sample B not containing SiO2 were brought into contact with the reactant shown in Table 3 and heated at 1500°C for a predetermined time, and the amount of wear on the samples after heating was measured. . The loss amount is plotted against heating time and is shown in FIG. As is clear from this Fig. 1, S
It was found that the amount of wear was reduced by not containing in.
次に、上記のようにＳｉＯ２を含有させないことによっ
て、アルミナ−黒鉛質の耐熱衝撃性が低下するため、黒
鉛量の適性化が要求される。黒鉛量が３０重量％以上で
は耐熱衝撃性に優れるものの、耐酸化性が低下し、損耗
が大きくなる。一方、１０重量％以下では耐熱衝撃性に
乏しくなる。Next, since the thermal shock resistance of the alumina-graphite substance is lowered by not containing SiO2 as described above, it is necessary to optimize the amount of graphite. When the amount of graphite is 30% by weight or more, thermal shock resistance is excellent, but oxidation resistance is decreased and wear and tear is increased. On the other hand, if it is less than 10% by weight, thermal shock resistance will be poor.
また、アルミナ量については８０重量％以上では耐熱衝
撃性が低下し、６０重量％以下では充分な耐食性が得ら
れない。また、溶融シリカについては１０重量％までは
損耗量をほとんど増大させずに耐熱衝撃性を付与させる
ことが判明した。Furthermore, if the amount of alumina is 80% by weight or more, the thermal shock resistance will decrease, and if it is less than 60% by weight, sufficient corrosion resistance will not be obtained. Furthermore, it has been found that up to 10% by weight of fused silica imparts thermal shock resistance with almost no increase in wear.
第２表
〔実施例〕
本発明品としてアルミナ７０重量％、黒鉛２０重量％、
残部金属添加物、その他からなる耐火原料配合物にフェ
ノールレジンを添加して混線、成形後、還元雰囲気にて
焼成して本発明に係る浸漬ノズルを製造した。Table 2 [Example] The products of the present invention include 70% by weight of alumina, 20% by weight of graphite,
A phenol resin was added to a refractory raw material mixture consisting of the balance metal additives and others, cross-wired, molded, and then fired in a reducing atmosphere to produce an immersed nozzle according to the present invention.
また、従来品としてアルミナ５０重量％、黒鉛２０重量
％、溶融シリカ２０重量％、残部金属添加物、その他か
らなる耐火原料配合物にフェノールレジンを添加して混
練、成形後、還元雰囲気にて焼成して従来品の浸漬ノズ
ルを製造した。In addition, as a conventional product, phenol resin is added to a refractory raw material mixture consisting of 50% by weight alumina, 20% by weight graphite, 20% by weight fused silica, the balance being metal additives, etc., kneaded, molded, and fired in a reducing atmosphere. A conventional immersion nozzle was manufactured.
上記本発明品と従来品を実機にて２チヤージ使用して、
使用後のノズルを回収し、内孔の損耗量を測定した。第
３表にその使用条件と損耗量を示す。この結果からも明
らかなように、本願発明品の損耗量は著しく小さいこと
が判る。Using two charges of the above-mentioned inventive product and conventional product in an actual machine,
The nozzle was collected after use, and the amount of wear on the inner hole was measured. Table 3 shows the usage conditions and amount of wear and tear. As is clear from this result, the amount of wear and tear of the product of the present invention is extremely small.
第３表
〔発明の効果〕
以上説明したようにこの発明によると、アルミレスステ
ンレス鋼鋳造時のノズル損耗が著しく低減し、従来２チ
ヤージしか使えなかったものが６チヤージまで使用可能
となった。Table 3 [Effects of the Invention] As explained above, according to the present invention, nozzle wear during aluminum-less stainless steel casting is significantly reduced, and it is now possible to use up to 6 charges, whereas previously only 2 charges could be used.
第１図は本発明品と従来品の特性を比較したグラフであ
る。
第 １
図
１、事件の表示
平成０１年特許願第７７７４２号
２、発明の名称
ステンレス鋼鋳造用ノズル
３、補正をする者
事件との関係 特許出願人
住 所 赤穂市中広字東沖１５７６番地の２〔補正の内
容〕
（１） 願書に添付の明細書中、第１頁、１５行の「
ダンデイシュ」を「タンデイシュ」に訂正する。
（２） 同上、第６頁、１４行の「第３表」を「第４
表１に訂正する。
（３） 同上、第６頁最終行と７頁第１行との間に下
記第４表を挿入する。
第 ４ 表
４、代理人FIG. 1 is a graph comparing the characteristics of the product of the present invention and the conventional product. 1 Figure 1, Display of the case 1999 Patent Application No. 77742 2 Name of the invention Stainless steel casting nozzle 3 Person making the amendment Relationship to the case Patent applicant address 1576 Higashioki, Nakahiro, Ako City 2 [Contents of amendment] (1) In the specification attached to the application, on page 1, line 15, “
"Dandesh" is corrected to "Tandesh". (2) Same as above, page 6, line 14, “Table 3” is changed to “Table 4”.
Corrected Table 1. (3) Same as above, insert Table 4 below between the last line of page 6 and the first line of page 7. Table 4. Agent
Claims (1)
％、溶融シリカ０〜１０重量％、その他金属添加物等を
バインダーと混練し、成形後、還元雰囲気にて焼成して
なるステンレス鋼鋳造用ノズル。[Scope of Claims] [1] 10 to 30% by weight of graphite, 60 to 80% by weight of alumina, 0 to 10% by weight of fused silica, and other metal additives are kneaded with a binder, molded, and then fired in a reducing atmosphere. Stainless steel casting nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077742A JPH02255564A (en) | 1989-03-28 | 1989-03-28 | Nozzle for casting stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077742A JPH02255564A (en) | 1989-03-28 | 1989-03-28 | Nozzle for casting stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02255564A true JPH02255564A (en) | 1990-10-16 |
Family
ID=13642363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1077742A Pending JPH02255564A (en) | 1989-03-28 | 1989-03-28 | Nozzle for casting stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02255564A (en) |
-
1989
- 1989-03-28 JP JP1077742A patent/JPH02255564A/en active Pending
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