JPH03205351A - Nozzle for continuously casting stainless steel - Google Patents
Nozzle for continuously casting stainless steelInfo
- Publication number
- JPH03205351A JPH03205351A JP1344031A JP34403189A JPH03205351A JP H03205351 A JPH03205351 A JP H03205351A JP 1344031 A JP1344031 A JP 1344031A JP 34403189 A JP34403189 A JP 34403189A JP H03205351 A JPH03205351 A JP H03205351A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- alloy
- amount
- stainless steel
- steel
- 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
- 239000010935 stainless steel Substances 0.000 title claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 8
- 238000005266 casting Methods 0.000 title description 3
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 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 5
- 229910003023 Mg-Al Inorganic materials 0.000 claims abstract description 4
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract 3
- 238000009749 continuous casting Methods 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000002829 reductive effect Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910044991 metal oxide Inorganic materials 0.000 description 6
- 150000004706 metal oxides Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 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〕
本発明は弱脱酸のステンレス鋼の鋳造に用いられる連続
鋳造用ノズルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous casting nozzle used for casting weakly deoxidized stainless steel.
弱脱酸のステンレス鋼の鋳造に用いられる連続鋳造用ノ
ズルとしては、ＡＮ２０，−Ｓｉ○２ＳｉＣ一黒鉛質の
耐火材原料を用いて或るノズルを使用することが一般的
である。As a continuous casting nozzle used for casting weakly deoxidized stainless steel, it is common to use a certain nozzle using AN20,-Si○2SiC-graphite refractory material raw material.
弱脱酸のステンレス銅の製鋼工程における網の脱酸のた
めにＭｎ，Ｓｉを添加することによって行われていて、
通常ＡＮは添加されない。従って、網中に存在する酸素
の活量は高く、Ｆｅ，Ｃｒ、Ｎｉ，Ｍｎ等の鋼中の金属
と反応して酸化物を容易に生戒する。こうして生戒した
金属酸化物は上記従来のＡＩ２２０ｓ ＳｉＯ。一Ｓ
ｉＣ一黒鉛（Ｃ）質の耐火材原料を用いて或るノズルの
損耗を大きくする。This is done by adding Mn and Si to deoxidize the mesh in the steelmaking process of weakly deoxidized stainless copper.
Usually AN is not added. Therefore, the activity of oxygen present in the mesh is high, and it reacts with metals in the steel, such as Fe, Cr, Ni, and Mn, and easily removes oxides. The metal oxide prepared in this way is the conventional AI220s SiO mentioned above. One S
iC - Using a graphite (C) refractory material to increase the wear and tear of a certain nozzle.
すなわち、上記ノズルに含まれるＳｉ○２やＳｉＣはＣ
との還元反応でＳｉ○とＣＯに分解されて気体となって
放出されたり、鋼中のＭｎ○との還元反応でＳｉ単体に
分解されて溶鋼中に溶解したりして消失する。また同じ
くＣは上記金属酸化物によって酸化され、Ｃ○となって
放出される等？反応を生じる。That is, Si○2 and SiC contained in the above nozzle are C
It decomposes into Si○ and CO in a reduction reaction with Mn○ in the steel and is released as a gas, or it decomposes into simple Si in a reduction reaction with Mn○ in the steel and dissolves in the molten steel and disappears. Similarly, C is oxidized by the metal oxide mentioned above and released as C○, etc.? produce a reaction.
従って、上記の考察から損耗の程度を低減したノズルを
提供するには、Ｓ ｉ Ｏ ｚの還元分解反応やＳｉ○
２とＭｎ○との還元分解反応を抑制し、さらにはＳｉ単
体が鋼中へ溶解することを抑制することが必要である。Therefore, from the above considerations, in order to provide a nozzle with reduced wear and tear, it is necessary to conduct a reductive decomposition reaction of SiOz or
It is necessary to suppress the reductive decomposition reaction between 2 and Mn◯, and further to suppress the dissolution of simple Si into the steel.
さらに上記の要件に加えて、鋼中の金属酸化物によって
生じるＣの酸化反応を抑制することも上記損耗の程度を
低減したノズルを提供するためには必要である。Furthermore, in addition to the above requirements, it is also necessary to suppress the oxidation reaction of C caused by metal oxides in the steel in order to provide a nozzle with reduced wear and tear.
従って、上記の要件を満たすためにノズルを構成する耐
火材原料にＳｉ戒分を含まないことが必要であるが、Ｓ
ｉ○２はＣの酸化反応を抑制して、ノズルに耐酸化性を
付与するためには必要であり、単純に上記ＳｉＯ■を添
加しないだけではおよそノズルの耐用性を高めることは
できない。Therefore, in order to meet the above requirements, it is necessary that the refractory raw material constituting the nozzle does not contain Si.
i○2 is necessary for suppressing the oxidation reaction of C and imparting oxidation resistance to the nozzle, and the durability of the nozzle cannot be improved simply by not adding the above-mentioned SiO■.
そこで本発明ではノズルの損耗量を少なくし、かつ耐酸
化性をも具備するステンレス鋼連続鋳造用ノズルを提供
することを目的とする。Therefore, an object of the present invention is to provide a stainless steel continuous casting nozzle that reduces the amount of nozzle wear and also has oxidation resistance.
上記の考察をもとに損耗量を少なくしたステンレス鋼連
続鋳造用ノズルを提供するために本発明では以下の手段
をとる。すなわち、少なくともアルミナ５０〜９０重量
％、黒鉛１０〜５０重量％から構或されるノズル本体の
耐火材原料であって、上記耐火材原料にＭｇ−Ａｌ合金
、Ａ６−Ｓｉ合金のうちの少なくとも１種類の合金を、
該合金に含まれるＡＡ量に換算して、１〜１０重量％配
合し、ＳｉＣ），を含まないことを特徴とするステンレ
ス鋼連続鋳造用ノズルである。Based on the above considerations, the present invention takes the following measures in order to provide a stainless steel continuous casting nozzle with reduced wear. That is, the refractory material for the nozzle body is composed of at least 50 to 90% by weight of alumina and 10 to 50% by weight of graphite, and the refractory material includes at least one of Mg-Al alloy and A6-Si alloy. types of alloys,
This nozzle for continuous casting of stainless steel is characterized in that the alloy contains 1 to 10% by weight of AA in terms of the amount of AA contained in the alloy, and does not contain SiC.
？作 用〕
本発明におけるノズルを構戒する耐火材原料の主或分で
ある黒鉛の配合量はアルミナの配合量を勘案して１０重
量％未満では耐熱衝撃性の低下をもたらし、５０重量％
を超える配合量であると、組織中の炭素量が過大となり
、損耗量が増して好ましくない。? Effect] The blending amount of graphite, which is the main component of the refractory material raw material forming the nozzle in the present invention, is less than 10% by weight, taking into account the blending amount of alumina, resulting in a decrease in thermal shock resistance, and 50% by weight.
If the blending amount exceeds the above, the amount of carbon in the structure becomes excessive, which increases the amount of wear and tear, which is not preferable.
本発明においては、ＳｉＯ■またはＳｉを含有する耐火
材原料を一切配合しないため、上記ＳｉＯ２の還元分解
反応やＭｎＯとの還元分解反応による損耗を生じず、そ
れに加えて、Ｓｉ○２、ＳｉＣ，Ｓｉが鋼中に溶出ずる
こともなく、さらに上記Ｓｉ或分を含まないことによっ
て低下する耐酸化性の維持のために、鋼中で酸化物を形
戒するＦｅ，Ｃｒ，Ｎｉ．．Ｃ等の物質よりも安定した
酸化物を形威する金属ＡＡを配合することにより、ノズ
ルを酸化し、損耗する有害な金属酸化物の生或を抑制す
る。In the present invention, since no SiO2 or Si-containing refractory materials are blended, there is no wear due to the reductive decomposition reaction of SiO2 or the reductive decomposition reaction with MnO, and in addition, Si○2, SiC, In order to prevent Si from leaching into the steel and to maintain the oxidation resistance, which is lowered by not containing a certain amount of Si, Fe, Cr, Ni. ．． By blending metal AA, which forms an oxide more stable than substances such as C, the production of harmful metal oxides that oxidize and wear out the nozzle is suppressed.
この際、上記金属ＡＡ・を単体で添加すると、ノズルの
焼或工程や実機使用の際の熱履歴によりノズルを構或す
る炭素と反応して、Ａｌ４Ｃｆｆを生戒して、体積膨張
を起こし、ノズルの折損を引き起こす自体に到るため、
ＭｇないしはＳｉとの合金を威してＡｌを添加し、安定
相として固定させるものである。At this time, if the above-mentioned metal AA is added alone, it will react with the carbon that makes up the nozzle due to the nozzle burning process or thermal history during actual machine use, deplete Al4Cff, and cause volumetric expansion. This can lead to breakage of the nozzle.
Al is added to the alloy with Mg or Si and is fixed as a stable phase.
こうして添加された金属Ａｌｌは、
３ＭｅＯｘ ＋２１Ａ１１ →ｘＡ１！ｚ Ｏｓ ＋３
Ｍｅ（Ｍｅ：鋼中に含まれる金属）
なる反応を生じ、組織中の炭素の酸化を防ぎ、それと同
時に上記反応で生或した／１．０３は他の鋼中金属酸化
物と反応し、高融点、高粘性化し、上記鋼中金属酸化物
のノズル内組織への侵入を防ぐ。The metal All added in this way is 3MeOx +21A11 →xA1! z Os +3
A reaction called Me (Me: a metal contained in steel) occurs and prevents the oxidation of carbon in the structure, and at the same time /1.03 produced in the above reaction reacts with other metal oxides in the steel, increasing the It has a high melting point and high viscosity, and prevents the metal oxide in the steel from penetrating into the nozzle internal structure.
上記ＡＩ！の添加量は合金の重量ではなく、Ａβ金属の
正味量として１〜１０重量％が望ましく、１重量％未満
では上記目的は達或できす、１０重量％を超える添加量
では、ノズルの耐食性および耐熱衝撃性の低下を招き好
ましくない。The above AI! The amount of addition is preferably 1 to 10% by weight as the net amount of Aβ metal, not the weight of the alloy.If it is less than 1% by weight, the above purpose cannot be achieved, but if it is added in an amount exceeding 10% by weight, the corrosion resistance of the nozzle and This is not preferable because it causes a decrease in thermal shock resistance.
以下、本発明の実施例を第１表をもとに説明する。 Examples of the present invention will be described below based on Table 1.
本発明品および従来品は第１表上欄に示す様な組戒であ
り、常法に従って戒形・焼或工程を経て気孔率、弾性率
、曲げ強度をそれぞれ測定し、同表中欄に示すような測
定値を得た。また第１表下欄には、鋼種ＳＵＳ３０４、
温度１５３０〜１５５０℃、時間４５０分で実機使用し
た場合の内孔の損耗量を示す。The products of the present invention and the conventional products are assembled as shown in the upper column of Table 1, and the porosity, elastic modulus, and bending strength were measured through the molding and burning process according to the usual method, and the results are shown in the middle column of the same table. The measurements shown were obtained. In addition, the lower column of Table 1 shows steel types SUS304,
The amount of wear on the inner hole is shown when the actual machine is used at a temperature of 1530 to 1550°C for 450 minutes.
本発明品、従来品とも気孔率、弾性率はほぼ同じで曲げ
強度が若干本発明品が上回っている程度の相違しかない
が、従来品の損耗量が１５＋＋ｎと大きく損耗したのに
対し、本発明品では０．５〜ＩＵと全く軽微であり、損
耗量の低減という初期の目的は大幅に達或できるもので
あり、著しい効果を認められた。The porosity and elastic modulus of the inventive product and the conventional product are almost the same, and the only difference is that the inventive product slightly exceeds the bending strength, but the conventional product had a large amount of wear of 15++n, while the present product had a large amount of wear. In the invented product, the amount was completely insignificant at 0.5 to IU, and the initial objective of reducing the amount of wear and tear was largely achieved, and a remarkable effect was recognized.
なお、本発明は上記実施例である本発明品に限られるも
のではなく、本発明の趣旨を逸脱しない範囲で種々の応
用が可能であることはいうまでもない。It goes without saying that the present invention is not limited to the above-mentioned embodiments of the present invention, and that various applications are possible without departing from the spirit of the present invention.
く以下余白〉
第
１
表
〔本発明の効果〕
上記のように本発明ではＳｉｎ２或分をふくまず、かつ
耐酸化性をも具備したステンレス網連続鋳造用ノズルを
提供することができて、従来のノズルに比較して連続鋳
造の連敗を増やすことが可能となった。Table 1 [Effects of the present invention] As described above, the present invention can provide a stainless steel mesh continuous casting nozzle that does not contain a certain amount of Sin2 and has oxidation resistance, and is superior to the conventional one. It has become possible to increase the number of consecutive losses in continuous casting compared to the previous nozzle.
その経済的な効果はコストダウンに大きく寄与するもの
である。The economic effect greatly contributes to cost reduction.
Claims (1)
〜５０重量％から構成されるノズル本体の耐火材原料で
あって、 上記耐火材原料にＭｇ−Ａｌ合金、Ａｌ−Ｓｉ合金のう
ちの少なくとも１種類の合金を、該合金に含まれるＡｌ
量に換算して、１〜１０重量％配合したことを特徴とす
るステンレス鋼連続鋳造用ノズル。(1) At least 50-90% by weight alumina, 10% graphite
~50% by weight of a refractory material for the nozzle body, wherein the refractory material contains at least one alloy of Mg-Al alloy and Al-Si alloy, and Al contained in the alloy
A nozzle for continuous casting of stainless steel, characterized in that it contains 1 to 10% by weight in terms of amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1344031A JPH03205351A (en) | 1989-12-29 | 1989-12-29 | Nozzle for continuously casting stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1344031A JPH03205351A (en) | 1989-12-29 | 1989-12-29 | Nozzle for continuously casting stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03205351A true JPH03205351A (en) | 1991-09-06 |
Family
ID=18366123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1344031A Pending JPH03205351A (en) | 1989-12-29 | 1989-12-29 | Nozzle for continuously casting stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03205351A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999014005A1 (en) * | 1997-09-17 | 1999-03-25 | Ishikawajima-Harima Heavy Industries Company Limited | Immersion nozzle for casting steel strip |
-
1989
- 1989-12-29 JP JP1344031A patent/JPH03205351A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999014005A1 (en) * | 1997-09-17 | 1999-03-25 | Ishikawajima-Harima Heavy Industries Company Limited | Immersion nozzle for casting steel strip |
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