JPH04280887A - Boron nitride(bn) composite material - Google Patents
Boron nitride(bn) composite materialInfo
- Publication number
- JPH04280887A JPH04280887A JP3043853A JP4385391A JPH04280887A JP H04280887 A JPH04280887 A JP H04280887A JP 3043853 A JP3043853 A JP 3043853A JP 4385391 A JP4385391 A JP 4385391A JP H04280887 A JPH04280887 A JP H04280887A
- Authority
- JP
- Japan
- Prior art keywords
- boron nitride
- sintered body
- composite sintered
- molten steel
- surface layer
- 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
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title abstract description 14
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 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
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- 239000011029 spinel Substances 0.000 claims abstract description 3
- 229910026161 MgAl2O4 Inorganic materials 0.000 claims abstract 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000035939 shock Effects 0.000 abstract description 7
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 229910052582 BN Inorganic materials 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 229910007277 Si3 N4 Inorganic materials 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229910018404 Al2 O3 Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、例えば溶鋼等侵食性の
高い溶融金属の処理に用いる窒化ホウ素（ＢＮ）系複合
材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boron nitride (BN) composite material used for treating highly corrosive molten metals such as molten steel.
【０００２】0002
【従来の技術】従来より水平連続鋳造用の鋳型とタンデ
ィシュを接続する耐火物（いわゆるブレークリング）や
、タンディシュの溶鋼温度測定用の熱電対保護管の構成
材料として、例えば窒化ケイ素（以下、Ｓｉ３ Ｎ４
と記載する）−窒化ホウ素（以下、ＢＮと記載する）系
複合焼結体あるいはサイアロン−ＢＮ系複合焼結体等の
反応焼結法ないしは常圧焼結法によって得られるＢＮ系
複合材が使用されてきた。このようなＢＮ系複合材は、
１５００℃前後の温度下で溶鋼に曝される結果、溶鋼と
の化学的な反応によって損耗することに加えて、ほぼ気
孔率２５〜３５％の割合で存在する該ＢＮ系複合材の気
孔中に溶鋼が侵入して凝固し、溶鋼の動きによって物理
的に摩耗除去される等の、激しい摩耗作用を受ける条件
下で使用される。[Prior Art] Conventionally, silicon nitride (hereinafter referred to as Si3 N4
)-boron nitride (hereinafter referred to as BN)-based composite sintered body or sialon-BN-based composite sintered body, etc. BN-based composite material obtained by reaction sintering method or pressureless sintering method is used. It has been. Such a BN-based composite material is
As a result of being exposed to molten steel at a temperature of around 1500°C, in addition to being damaged by chemical reactions with the molten steel, the pores of the BN-based composite, which exist at a porosity of approximately 25 to 35%, It is used under conditions where it is subjected to severe abrasion, such as when molten steel enters and solidifies and is physically worn away by the movement of the molten steel.
【０００３】このため、耐侵食性の向上を図るために、
組織の緻密化を図る目的で、例えば特開昭５６−１２０
５７５号公報では、組織の緻密化を図るために原料に窒
化アルミニウム（ＡｌＮ）を添加したＳｉ３ Ｎ４ −
ＢＮ系複合焼結体が開示され、また特願昭５８−１５８
７８３号では、同じく原料にアルミナ（Ａｌ２ Ｏ３
）を添加したＳｉ３ Ｎ４ −ＢＮ系複合焼結体等が提
案されている。[0003] Therefore, in order to improve the erosion resistance,
For the purpose of making the organization more detailed, for example,
Publication No. 575 discloses Si3 N4 - in which aluminum nitride (AlN) is added to the raw material in order to make the structure denser.
A BN-based composite sintered body was disclosed, and patent application No. 58-158
No. 783 also uses alumina (Al2O3) as a raw material.
) has been proposed, such as a Si3N4-BN composite sintered body.
【０００４】0004
【発明が解決しようとする課題】しかしながら、上記特
開昭５６−１２０５７５号公報記載の、および特願昭５
８−１５８７８３号のＳｉ３ Ｎ４−ＢＮ系複合焼結体
はいずれも溶鋼に対する耐侵食性の向上に一定の効果は
認められるものの、依然として１０％程度の気孔率を有
するために、特に侵食性の高いステンレス鋼に対する場
合には上述した気孔中に溶鋼が侵入して凝固し、溶鋼の
動きによって物理的に摩耗される損耗メカニズムを解消
するには至らず、長時間の使用では問題があった。[Problems to be Solved by the Invention] However, the above-mentioned Japanese Patent Application Laid-open No. 56-120575 and Japanese Patent Application No. 1983
Although the Si3N4-BN composite sintered body of No. 8-158783 has a certain effect on improving the corrosion resistance against molten steel, it still has a porosity of about 10%, so it is particularly erodible. In the case of stainless steel, the wear mechanism in which molten steel enters the pores and solidifies, and is physically worn away by the movement of the molten steel cannot be solved, and this poses a problem in long-term use.
【０００５】さらに上記ＡｌＮ及びＡｌ２ Ｏ３ を原
料中に配合することによって耐熱衝撃性が低下すること
が指摘されている。本発明は上記従来の事情に鑑み、提
案されたものであって、耐熱衝撃性を損なうことなく、
溶鋼に対する耐侵食性を向上させたＢＮ系複合材を提供
することを目的とするものである。Furthermore, it has been pointed out that the thermal shock resistance is lowered by blending the above-mentioned AlN and Al2 O3 into the raw materials. The present invention has been proposed in view of the above-mentioned conventional circumstances, and the present invention has been proposed without impairing thermal shock resistance.
The object of the present invention is to provide a BN-based composite material with improved corrosion resistance against molten steel.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明は以下の手段を採用する。すなわち、窒化ケイ
素（Ｓｉ３ Ｎ４ ）−窒化ホウ素（ＢＮ）系複合焼結
体あるいはサイアロン−窒化ホウ素（ＢＮ）系複合焼結
体を、アルミナ（Ａｌ２ Ｏ３ ）、ジルコニア（Ｚｒ
Ｏ２ ）、マグネシア（ＭｇＯ）、スピネル（ＭｇＡｌ
２ Ｏ４）のうちから選ばれる１種以上の物質を焼結さ
せた表面層で被覆した窒化ホウ素（ＢＮ）系複合材であ
る。[Means for Solving the Problems] In order to achieve the above object, the present invention employs the following means. That is, a silicon nitride (Si3 N4)-boron nitride (BN)-based composite sintered body or a sialon-boron nitride (BN)-based composite sintered body is replaced with alumina (Al2 O3), zirconia (Zr
O2 ), magnesia (MgO), spinel (MgAl
This is a boron nitride (BN)-based composite material coated with a surface layer made by sintering one or more substances selected from the group consisting of 2 O4).
【０００７】[0007]
【作用】上記の構成によれば、いずれも溶鋼等に対する
耐侵食性に優れた材料であるＡｌ２ Ｏ３ 、ＺｒＯ２
、ＭｇＯ、ＭｇＡｌ２ Ｏ４ の内から選ばれる１種
以上の物質を焼結して得られた表面層は、該ＢＮ系複合
材の表面から侵入しようとする溶鋼等に対して防御する
機能を有するとともに、基材であるＢＮ系複合材の熱伝
導率を大幅に変化させることがないので耐熱衝撃性が低
下することはない。[Operation] According to the above structure, Al2O3 and ZrO2, both of which are materials with excellent corrosion resistance against molten steel, etc.
The surface layer obtained by sintering one or more substances selected from the group consisting of Since the thermal conductivity of the BN-based composite material, which is the base material, is not significantly changed, the thermal shock resistance does not deteriorate.
【０００８】上記表面層は、含浸法や塗布法、ＣＶＤな
どの形成方法があるが、基材であるＢＮ系複合材との密
着性が高く、高温使用下でも基材との剥離が生じない方
法として含浸法等が好ましい。また、表面層の厚みは溶
融金属の侵食を防止する目的のためには、１０μｍ 以
上が要求され、逆に該表面層が厚すぎると熱伝導率の低
い表面層との膨張率の差から耐熱衝撃性が低下し、表面
層の剥離を生ずることがあり、好ましくは３０〜３００
μｍ が好適と確認できた。このような表面層の厚みは
含浸時間、塗布作業手段の選択、コーティング時間等、
各形成方法でのファクターを調節することで任意にコン
トロールすることができる。[0008] The above-mentioned surface layer can be formed by impregnation, coating, CVD, or other methods, but it has high adhesion to the BN composite material that is the base material, and does not peel off from the base material even when used at high temperatures. As a method, an impregnation method or the like is preferable. In addition, the thickness of the surface layer is required to be 10 μm or more for the purpose of preventing erosion of molten metal, and conversely, if the surface layer is too thick, it will resist heat due to the difference in expansion coefficient with the surface layer, which has low thermal conductivity. The impact strength may decrease and the surface layer may peel off, so preferably 30 to 300
It was confirmed that μm is suitable. The thickness of this surface layer depends on the impregnation time, selection of application method, coating time, etc.
It can be arbitrarily controlled by adjusting the factors in each formation method.
【０００９】[0009]
【実施例】以下、実施例を基に、本発明を具体的に説明
する。
○実施例１
気孔率２５％のサイアロン−ＢＮ系複合焼結体の一面を
アルミナ（Ａｌ２ Ｏ３ ）ゾル中に浸漬し、他面より
真空吸引してアルミナゾルを含浸させた。その後、この
サイアロン−ＢＮ系複合焼結体を乾燥させた後、Ｎ２
雰囲気中、１６００℃で焼成し、１５０μｍの厚み（Ｅ
ＰＭＡ Ｅｌｅｃｔｒｏｎ ｐｒｏｂｅ ｍｉｃｒｏａ
ｎａｌｙｓｅｒ による線分析で測定）をもつ、Ａｌ２
Ｏ３ の表面層を形成させ、実施例１を得た。[Examples] The present invention will be specifically explained below based on Examples. Example 1 One side of a Sialon-BN composite sintered body having a porosity of 25% was immersed in alumina (Al2O3) sol, and vacuum suction was applied from the other side to impregnate the alumina sol. Thereafter, after drying this sialon-BN composite sintered body, N2
It was fired at 1600°C in an atmosphere to a thickness of 150 μm (E
PMA Electron probe microa
(measured by line analysis using a analyzer)
A surface layer of O3 was formed to obtain Example 1.
【００１０】このようにして得られたサイアロン−ＢＮ
系複合焼結体を溶融したステンレス鋼（ＳＵＳ３０４）
中に１５５０℃で５時間浸漬し、侵食量を調べた。尚、
比較材として上記処理を施さない気孔率２５％のサイア
ロン−ＢＮ系複合焼結体も同条件で溶融したステンレス
鋼（ＳＵＳ３０４）中に浸漬し、侵食量を調べた。その
結果、比較材のサイアロン−ＢＮ系複合焼結体は、表面
より４．５ｍｍの深さまで溶鋼による侵食が進み、試料
が損耗していたのに対して、上記実施例では溶鋼による
侵食が全く認められず、損耗量は０であった。Sialon-BN thus obtained
Stainless steel (SUS304) with fused composite sintered body
The specimens were immersed for 5 hours at 1550°C and the amount of corrosion was examined. still,
As a comparison material, a Sialon-BN composite sintered body having a porosity of 25% and not subjected to the above treatment was also immersed in molten stainless steel (SUS304) under the same conditions, and the amount of erosion was examined. As a result, the comparison material Sialon-BN composite sintered body was eroded by molten steel to a depth of 4.5 mm from the surface, and the sample was worn out, whereas in the above example, there was no erosion by molten steel. No damage was observed, and the amount of wear was 0.
【００１１】また、上記実施例１の熱伝導率は０．０２
ｃａｌ／ｃｍ・ｓｅｃ ・℃であり、比較材の熱伝導率
と殆ど変わらない値を示し、耐熱衝撃性も従来と同等の
性能を有するものと判断できる。
○実施例２
気孔率３２％のＳｉ３ Ｎ４ −ＢＮ系複合焼結体をジ
ルコニア（ＺｒＯ２ ）ゾル中に浸漬し、他面より真空
吸引してジルコニアゾルを含浸させた。その後、このＳ
ｉ３ Ｎ４ −ＢＮ系複合焼結体を乾燥させた後、Ｎ２
雰囲気中、１５００℃で焼成し、４０μｍの厚み（Ｅ
ＰＭＡによる線分析で測定）をもつ、ＺｒＯ２ の表面
層を形成させ、実施例２を得た。[0011] Also, the thermal conductivity of Example 1 is 0.02
cal/cm·sec·°C, which is almost the same as the thermal conductivity of the comparative material, and it can be judged that the thermal shock resistance is equivalent to that of the conventional material. Example 2 A Si3N4-BN composite sintered body having a porosity of 32% was immersed in zirconia (ZrO2) sol, and vacuum suction was applied from the other side to impregnate the zirconia sol. Then this S
After drying the i3 N4 -BN composite sintered body, N2
Sintered at 1500°C in an atmosphere to a thickness of 40 μm (E
Example 2 was obtained by forming a surface layer of ZrO2, which had a surface layer of ZrO2 (as measured by line analysis using PMA).
【００１２】このようにして得られたＳｉ３ Ｎ４ −
ＢＮ系複合焼結体を溶融したステンレス鋼（ＳＵＳ３０
４）中に１５５０℃で５時間浸漬し、侵食量を調べた。
尚、比較材として上記処理を施さない気孔率２５％のＳ
ｉ３ Ｎ４ −ＢＮ系複合焼結体も同条件で溶融したス
テンレス鋼（ＳＵＳ３０４）中に浸漬し、侵食量を調べ
た。その結果、比較材のサイアロン−ＢＮ系複合焼結体
は、表面より７．０ｍｍの深さまで溶鋼による侵食が進
み、試料が損耗していたのに対して、上記実施例では溶
鋼による侵食深さは僅かに０．３ｍｍであった。[0012] The thus obtained Si3 N4 −
Stainless steel (SUS30
4) for 5 hours at 1550°C, and the amount of corrosion was examined. In addition, as a comparison material, S with a porosity of 25% without the above treatment was used.
The i3 N4 -BN composite sintered body was also immersed in molten stainless steel (SUS304) under the same conditions to examine the amount of corrosion. As a result, the comparison material, the Sialon-BN composite sintered body, was eroded by molten steel to a depth of 7.0 mm from the surface, and the sample was worn out, whereas in the above example, the erosion depth by molten steel was was only 0.3 mm.
【００１３】また、上記実施例２の熱伝導率も０．０２
ｃａｌ／ｃｍ・ｓｅｃ ・℃であり、比較材の熱伝導率
と殆ど変わらない値を示し、耐熱衝撃性も従来と同等の
性能を有するものと判断できる。本発明は上記２例の実
施例に限定されるものではなく、本発明の趣旨を逸脱し
ない範囲で該窒化ホウ素系複合材の使用条件に則して種
々の応用が可能があることはいうまでもない。[0013] Furthermore, the thermal conductivity of Example 2 was also 0.02.
cal/cm·sec·°C, which is almost the same as the thermal conductivity of the comparative material, and it can be judged that the thermal shock resistance is equivalent to that of the conventional material. It goes without saying that the present invention is not limited to the above two examples, and that various applications are possible according to the conditions of use of the boron nitride composite material without departing from the spirit of the present invention. Nor.
【００１４】[0014]
【発明の効果】以上のように本発明によるＢＮ系複合材
は、Ｓｉ３ Ｎ４ −ＢＮあるいはサイアロン−ＢＮ系
複合焼結体の表面に高耐侵食性のＡｌ２ Ｏ３ 、Ｚｒ
Ｏ２ 、ＭｇＯ、ＭｇＡｌ２ Ｏ４ を焼結させた表面
層により、耐熱衝撃性を低下させることなくステンレス
鋼のような侵食性の高い溶鋼に対しても優れた耐侵食性
を有するものであり、また例えば水平連続鋳造用の鋳型
とタンディシュを接続する耐火物（いわゆるブレークリ
ング）や、タンディシュの溶鋼温度測定用の熱電対保護
管の構成材料として使用した場合には、長時間安定鋳造
や連続測温等を可能にする効果がある。As described above, the BN-based composite material according to the present invention has highly corrosion-resistant Al2O3 and Zr on the surface of the Si3N4-BN or Sialon-BN-based composite sintered body.
Due to the surface layer made of sintered O2, MgO, and MgAl2 O4, it has excellent corrosion resistance against highly corrosive molten steel such as stainless steel without reducing thermal shock resistance. When used as a refractory (so-called break ring) that connects the mold and tundish for horizontal continuous casting, or as a component of a thermocouple protection tube for measuring the temperature of molten steel in the tundish, it can be used for long-term stable casting, continuous temperature measurement, etc. It has the effect of making it possible.
Claims (1)
ホウ素（ＢＮ）系複合焼結体あるいはサイアロン−窒化
ホウ素（ＢＮ）系複合焼結体を、アルミナ（Ａｌ２ Ｏ
３ ）、ジルコニア（ＺｒＯ２ ）、マグネシア（Ｍｇ
Ｏ）、スピネル（ＭｇＡｌ２ Ｏ４ ）のうちから選ば
れる１種以上の物質を焼結させた表面層で被覆すること
を特徴とするＢＮ系複合材。Claim 1: A silicon nitride (Si3N4)-boron nitride (BN)-based composite sintered body or a sialon-boron nitride (BN)-based composite sintered body is combined with alumina (Al2O
3), zirconia (ZrO2), magnesia (Mg
A BN-based composite material characterized by being coated with a surface layer formed by sintering one or more substances selected from O), spinel (MgAl2O4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3043853A JPH04280887A (en) | 1991-03-08 | 1991-03-08 | Boron nitride(bn) composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3043853A JPH04280887A (en) | 1991-03-08 | 1991-03-08 | Boron nitride(bn) composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04280887A true JPH04280887A (en) | 1992-10-06 |
Family
ID=12675273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3043853A Pending JPH04280887A (en) | 1991-03-08 | 1991-03-08 | Boron nitride(bn) composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04280887A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156286A (en) * | 2000-11-16 | 2002-05-31 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| JP4535306B2 (en) * | 2000-10-27 | 2010-09-01 | いすゞ自動車株式会社 | Temperature measuring instrument |
| CN104761271A (en) * | 2015-04-02 | 2015-07-08 | 安徽纽亚达科技有限责任公司 | Magnesium-aluminum spinel-BN-Sialon multiphase refractory raw material and preparation method thereof |
| CN111069579A (en) * | 2019-12-31 | 2020-04-28 | 浙江红鹰铭德高温材料科技有限公司 | Long-life tundish integral impact barrel, formula and manufacturing process thereof |
-
1991
- 1991-03-08 JP JP3043853A patent/JPH04280887A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4535306B2 (en) * | 2000-10-27 | 2010-09-01 | いすゞ自動車株式会社 | Temperature measuring instrument |
| JP2002156286A (en) * | 2000-11-16 | 2002-05-31 | Isuzu Ceramics Res Inst Co Ltd | Thermocouple |
| JP4484129B2 (en) * | 2000-11-16 | 2010-06-16 | いすゞ自動車株式会社 | thermocouple |
| CN104761271A (en) * | 2015-04-02 | 2015-07-08 | 安徽纽亚达科技有限责任公司 | Magnesium-aluminum spinel-BN-Sialon multiphase refractory raw material and preparation method thereof |
| CN111069579A (en) * | 2019-12-31 | 2020-04-28 | 浙江红鹰铭德高温材料科技有限公司 | Long-life tundish integral impact barrel, formula and manufacturing process thereof |
| CN111069579B (en) * | 2019-12-31 | 2021-10-15 | 浙江红鹰铭德高温材料科技有限公司 | Long-life tundish integral impact barrel, formula and manufacturing process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102149166B1 (en) | Coating liquid and method for producing refractory material having coating layer | |
| JP2002502462A (en) | Gradient material of metal and ceramic, product thereof, and method of manufacturing gradient material of metal and ceramic | |
| JPH0789779A (en) | Self-recovery function coating material and its production | |
| JPS6311574A (en) | Thermocouple protection tube and manufacture | |
| JPH04280887A (en) | Boron nitride(bn) composite material | |
| Koh et al. | Improvement in oxidation resistance of carbon by formation of a protective SiO2 layer on the surface | |
| JPH05501850A (en) | Method for producing rigid insulating fire-resistant material and material obtained thereby | |
| Riu et al. | Oxidation behaviour and strength of B 4 C-30 wt% SiC composite materials | |
| Hnatko et al. | Corrosion of engineering ceramic materials by molten iron Part II: Alumina | |
| JPS6050750B2 (en) | Silicon nitride composite sintered body | |
| JP2005213081A (en) | Silicon nitride sintered body and member for molten metal using the same | |
| Abreal et al. | Effect of Y2O3 addition on alumina-hex boron nitride composites | |
| KR20040082399A (en) | Articles for casting applications comprising ceramic composite and methods for making articles thereof | |
| Koh et al. | Strengthening and prevention of oxidation of aluminum nitride by formation of a silica layer on the surface | |
| JP2613086B2 (en) | Thermocouple protection tube and its manufacturing method | |
| JP2698186B2 (en) | Manufacturing method of casting nozzle member | |
| JP2938098B2 (en) | BN-SiC composite sintered body | |
| Wu et al. | The effect of boron additive on the oxidation resistance of SiC-protected graphite | |
| JP2971824B2 (en) | High corrosion resistance refractory | |
| JP3255353B2 (en) | Ceramic structure | |
| JP3255354B2 (en) | Ceramic structure | |
| JP3520998B2 (en) | Heat-resistant silicon nitride sintered body and method for producing the same | |
| RU2243955C2 (en) | Composite | |
| JPS637358A (en) | Formation of coating layer by water plasma thermal spraying having excellent erosion resistance | |
| Yi et al. | Enhanced High Temperature Corrosion Resistance of Al2O3/Al Composite Coating on γ-TiAl Alloy |