JPH04344857A - Nozzle for casting molten metal - Google Patents
Nozzle for casting molten metalInfo
- Publication number
- JPH04344857A JPH04344857A JP3146718A JP14671891A JPH04344857A JP H04344857 A JPH04344857 A JP H04344857A JP 3146718 A JP3146718 A JP 3146718A JP 14671891 A JP14671891 A JP 14671891A JP H04344857 A JPH04344857 A JP H04344857A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- casting
- graphite
- alumina
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 8
- 238000005266 casting Methods 0.000 title claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 239000010703 silicon Substances 0.000 claims abstract description 11
- 238000009749 continuous casting Methods 0.000 claims abstract description 10
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007654 immersion Methods 0.000 claims abstract description 6
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 238000005058 metal casting Methods 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 8
- 239000007770 graphite material Substances 0.000 abstract 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、冶金分野における連続
鋳造用ロングノズルや浸漬ノズル等の溶融金属鋳造用ノ
ズルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for casting molten metal, such as a long nozzle for continuous casting or a submerged nozzle, in the field of metallurgy.
【０００２】0002
【従来の技術】従来、たとえば連続鋳造においては、タ
ンディッシュからモ−ルドに溶融金属を注出するのに、
ロングノズルや浸漬ノズルを用いて行なっている。これ
らのノズルを使用することにより、溶鋼の空気との接触
による酸化が防止でき、非金属介在物が鋳片に巻き込ま
れるのを防止することができて、品質の良好な鋳片を製
造することができる。[Prior Art] Conventionally, in continuous casting, for example, when pouring molten metal from a tundish into a mold,
This is done using a long nozzle or submerged nozzle. By using these nozzles, it is possible to prevent oxidation of molten steel due to contact with air, and to prevent non-metallic inclusions from getting caught up in the slab, thereby producing slabs of good quality. Can be done.
【０００３】また、これらのノズルは、高温の溶融金属
と接触して高温状態にさらされるため、熱的な衝撃を受
けるとともに、侵食を受けて溶損しやすいものであった
。そのためステンレススチ−ルのファイバ−や溶融シリ
カ（Ｓｉ Ｏ２ ）を添加したりして改善することが行
なわれている。[0003] Furthermore, since these nozzles come into contact with high-temperature molten metal and are exposed to high-temperature conditions, they are subject to thermal shock and are susceptible to corrosion and melting damage. Therefore, attempts have been made to improve this by adding stainless steel fibers or fused silica (SiO2).
【０００４】0004
【発明が解決しようとする課題】しかし、上記の手段に
よって、耐熱衝撃性は改善できるものの、耐食性が低下
し、長期の連続操業を行なうことができなかった。[Problems to be Solved by the Invention] However, although the thermal shock resistance can be improved by the above-mentioned means, the corrosion resistance deteriorates and long-term continuous operation cannot be carried out.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記のような
点に鑑みたもので、上記の課題を解決するために、連続
鋳造用ロングノズルや浸漬ノズル等の溶融金属鋳造用ノ
ズルにおいて、上記ノズルがアルミナ−黒鉛質、ジルコ
ニア−黒鉛質、またはアルミナ−ジルコニア−黒鉛質の
ものであるとともに、所定量のシリコンを配合して、窒
素雰囲気中で焼成することにより窒化珪素を均一状に分
布した組織としていることを特徴とする溶融金属鋳造用
ノズルを提供するにある。[Means for Solving the Problems] The present invention has been made in view of the above-mentioned points, and in order to solve the above-mentioned problems, in a nozzle for molten metal casting such as a long nozzle for continuous casting or an immersion nozzle, The above nozzle is made of alumina-graphite, zirconia-graphite, or alumina-zirconia-graphite, and a predetermined amount of silicon is blended and fired in a nitrogen atmosphere to uniformly distribute silicon nitride. To provide a nozzle for casting molten metal, which is characterized by having a structure of
【０００６】[0006]
【作用】本発明によれば、連続鋳造用ロングノズルや浸
漬ノズル等のノズルをアルミナ−黒鉛質、ジルコニア−
黒鉛質、またはアルミナ−ジルコニア−黒鉛質のものと
することによって、耐熱性の向上をはかれるとともに、
アルミナ等の脱酸生成物等による内孔の閉塞を極力防止
できる。[Operation] According to the present invention, nozzles such as long nozzles for continuous casting and immersion nozzles can be made of alumina, graphite, zirconia, etc.
By using graphite or alumina-zirconia-graphite, heat resistance can be improved, and
It is possible to prevent the inner pores from being clogged with deoxidized products such as alumina as much as possible.
【０００７】そして、上記ノズルに所定量のシリコンを
配合して、窒素雰囲気中で焼成することにより窒化珪素
を均一状に分布した組織としていることによって、破壊
靱性の向上がはかれ、かつ熱伝導率を向上できて耐熱衝
撃性を向上できる。[0007] By blending a predetermined amount of silicon into the nozzle and firing it in a nitrogen atmosphere, a structure in which silicon nitride is uniformly distributed is achieved, which improves fracture toughness and improves thermal conductivity. It is possible to improve thermal shock resistance.
【０００８】[0008]
【実施例】以下、本発明を実施例にもとづいて説明する
。本発明の連続鋳造用ロングノズルや浸漬ノズル等の溶
融金属鋳造用ノズルは、アルミナ−黒鉛質、ジルコニア
−黒鉛質、またはアルミナ−ジルコニア−黒鉛質として
耐熱性、耐食性をはかっており、さらに所定量のシリコ
ンを配合し、窒素ガス雰囲気下で焼成して窒化珪素が均
一状に分布している組織として、強度の向上をはかって
いる。EXAMPLES The present invention will be explained below based on examples. The nozzle for molten metal casting, such as the long nozzle for continuous casting or the immersion nozzle of the present invention, is made of alumina-graphite, zirconia-graphite, or alumina-zirconia-graphite for heat resistance and corrosion resistance, and also has a predetermined amount of The material is blended with silicon and fired in a nitrogen gas atmosphere to create a structure in which silicon nitride is evenly distributed, improving strength.
【０００９】上記アルミナ、ジルコニアは３０〜９０重
量％、黒鉛１０〜７０重量％、その他シリカなど公知の
材料を適量配合することができる。また、シリコンは０
．１〜１０重量％含有させて成形し、窒素ガス雰囲気下
で焼成して窒化珪素を形成して、窒化珪素が上記配合材
料の構造内に均一状に分布して絡み合った組織としてい
る。The above alumina and zirconia may be blended in an appropriate amount in an amount of 30 to 90% by weight, graphite in an amount of 10 to 70% by weight, and other known materials such as silica. Also, silicon is 0
．． The silicon nitride is formed by containing 1 to 10% by weight and fired in a nitrogen gas atmosphere to form a structure in which silicon nitride is uniformly distributed and intertwined within the structure of the compounded material.
【００１０】0010
【比較例】比較配合表[Comparative example] Comparison recipe table
【表１】[Table 1]
【００１１】上記した本発明について、表１のように配
分成分を変え、これらの配合のものを連続鋳造用ロング
ノズルの形状にプレス成形し、窒素ガス雰囲気下、１０
００℃で１２時間焼成した。そして、万能試験機で曲げ
試験を、高周波加熱スポ−リング試験機で耐熱衝撃試験
を、高周波炉内張り侵食試験機で耐食性試験を行なった
。その結果を図１、図２、図３に示している。[0011] Regarding the above-mentioned present invention, the distributed components were changed as shown in Table 1, and these mixtures were press-molded into the shape of a long nozzle for continuous casting, and then heated for 10 minutes in a nitrogen gas atmosphere.
It was baked at 00°C for 12 hours. Then, a bending test was carried out using a universal testing machine, a thermal shock resistance test was carried out using a high frequency heating spalling test machine, and a corrosion resistance test was carried out using a high frequency furnace lining erosion test machine. The results are shown in FIGS. 1, 2, and 3.
【００１２】図１、図２から分かるように、シリコンを
添加して窒素ガス雰囲気下で焼成することにより、強度
および耐熱衝撃性が大きく向上し、Ｓｉ Ｏ２ 含有系
、ステンレススチ−ルファイバ−含有系に近い強さとな
った。As can be seen from FIGS. 1 and 2, by adding silicon and firing in a nitrogen gas atmosphere, the strength and thermal shock resistance are greatly improved, and SiO2-containing and stainless steel fiber-containing systems The strength was close to that of
【００１３】一方、図３から分かるように、Ｓｉ Ｏ２
含有系やステンレススチ−ルファイバ−含有系のもの
では耐食性が劣化するのに対し、シリコンのみを添加し
たものでは耐食性の低下がほとんどなく、むしろ向上す
る傾向さえみられる。On the other hand, as can be seen from FIG.
In contrast to those containing stainless steel fibers and those containing stainless steel fibers, the corrosion resistance deteriorates, whereas in those containing only silicon, there is almost no decrease in corrosion resistance, and there is even a tendency for the corrosion resistance to improve.
【００１４】上記では、アルミナ−黒鉛質のものについ
て説明したが、ジルコニア−黒鉛質やアルミナ−ジルコ
ニア−黒鉛質のものについても同様に適用することがで
き、また連続鋳造用以外の溶融金属鋳造用ノズルについ
ても同様に実施できる。[0014] In the above, the alumina-graphite type was explained, but it can be similarly applied to the zirconia-graphite type or the alumina-zirconia-graphite type, and it is also applicable to molten metal casting other than continuous casting. The same can be applied to the nozzle.
【００１５】[0015]
【発明の効果】以上のように本発明にあっては、溶融金
属鋳造用ノズルをその耐食性を低下させることなく、耐
熱衝撃性を大幅に向上させることができ、また内孔の閉
塞も極力防止できて、溶融金属鋳造の長期にわたる連続
操業を行なうことができる。[Effects of the Invention] As described above, according to the present invention, the thermal shock resistance of a nozzle for molten metal casting can be greatly improved without reducing its corrosion resistance, and clogging of the inner hole can be prevented as much as possible. This allows long-term continuous operation of molten metal casting.
【図１】本発明の一実施例のシリコン添加量と曲げ強さ
の比較図、[Fig. 1] Comparison diagram of silicon addition amount and bending strength of one example of the present invention,
【図２】同上のシリコン添加量と耐熱衝撃性の比較図、
[Figure 2] Comparison diagram of the amount of silicon added and thermal shock resistance as above,
【図３】同上のシリコン添加量と耐食性の比較図。FIG. 3 is a comparison diagram of the amount of silicon added and corrosion resistance.
Claims (1)
等の溶融金属鋳造用ノズルにおいて、上記ノズルがアル
ミナ−黒鉛質、ジルコニア−黒鉛質、またはアルミナ−
ジルコニア−黒鉛質のものであるとともに、所定量のシ
リコンを配合して、窒素雰囲気中で焼成することにより
窒化珪素を均一状に分布した組織としていることを特徴
とする溶融金属鋳造用ノズル。Claim 1: In a nozzle for molten metal casting such as a long nozzle for continuous casting or an immersion nozzle, the nozzle is made of alumina-graphite, zirconia-graphite, or alumina-graphite.
1. A nozzle for casting molten metal, which is made of zirconia-graphite and has a structure in which silicon nitride is uniformly distributed by blending a predetermined amount of silicon and firing in a nitrogen atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3146718A JPH04344857A (en) | 1991-05-21 | 1991-05-21 | Nozzle for casting molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3146718A JPH04344857A (en) | 1991-05-21 | 1991-05-21 | Nozzle for casting molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04344857A true JPH04344857A (en) | 1992-12-01 |
Family
ID=15413979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3146718A Pending JPH04344857A (en) | 1991-05-21 | 1991-05-21 | Nozzle for casting molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04344857A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998035774A1 (en) * | 1997-02-14 | 1998-08-20 | Acciai Speciali Terni S.P.A. | Feeder of molten metal for moulds of continuous casting machines |
| CN105127409A (en) * | 2015-09-15 | 2015-12-09 | 辽宁科技大学 | Preheating-free long nozzle capable of being repeatedly used and preparing method thereof |
-
1991
- 1991-05-21 JP JP3146718A patent/JPH04344857A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998035774A1 (en) * | 1997-02-14 | 1998-08-20 | Acciai Speciali Terni S.P.A. | Feeder of molten metal for moulds of continuous casting machines |
| CN105127409A (en) * | 2015-09-15 | 2015-12-09 | 辽宁科技大学 | Preheating-free long nozzle capable of being repeatedly used and preparing method thereof |
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