JPS632858A - Manufacture of boron nitride-containing refractories - Google Patents
Manufacture of boron nitride-containing refractoriesInfo
- Publication number
- JPS632858A JPS632858A JP61145548A JP14554886A JPS632858A JP S632858 A JPS632858 A JP S632858A JP 61145548 A JP61145548 A JP 61145548A JP 14554886 A JP14554886 A JP 14554886A JP S632858 A JPS632858 A JP S632858A
- Authority
- JP
- Japan
- Prior art keywords
- boron nitride
- resistance
- weight
- strength
- manufacture
- 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.)
- Granted
Links
- 229910052582 BN Inorganic materials 0.000 title claims description 19
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000011819 refractory material Substances 0.000 title description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 8
- 229910052596 spinel Inorganic materials 0.000 claims description 6
- 239000011029 spinel Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000011863 silicon-based powder Substances 0.000 claims 1
- 238000004901 spalling Methods 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 102100026816 DNA-dependent metalloprotease SPRTN Human genes 0.000 description 1
- 101710175461 DNA-dependent metalloprotease SPRTN Proteins 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000019621 digestibility Nutrition 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、溶融金属及び又はスラグに接する個所に好適
に使用される耐火物とその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refractory suitable for use in areas that come into contact with molten metal and/or slag, and a method for manufacturing the same.
かかる個所に使用される耐火物として、窒化硼素を含有
せしめたものが、特開昭５５−３４６６３号公報、特開
昭５６−１２０５７５号公報、特開昭５６−１３９２６
０号公報、特開昭５９−１６９９８２号公報等に開示さ
れている。Refractories containing boron nitride used in such places are disclosed in JP-A-55-34663, JP-A-56-120575, and JP-A-56-13926.
This method is disclosed in Japanese Patent Application Laid-Open No. 59-169982, etc.
窒化硼素を含有する耐火物はスラグに対して極めて安定
であり、かつ優れた耐スポーリング性を存するものであ
るが、圧縮強さが４５０ｋｇ／ｃ＋Ｊ以下で、熱間曲げ
強さも充分ではない。その結果、振動もしくは摩耗に関
する耐久性が不足するという問題がある。Refractories containing boron nitride are extremely stable against slag and have excellent spalling resistance, but their compressive strength is less than 450 kg/c+J and their hot bending strength is not sufficient. As a result, there is a problem that durability with respect to vibration or wear is insufficient.
例えば、特開昭５５−３４６６３号公報に記載の窒化硼
素を含有する耐火物は黒鉛を含有しており、強度向上は
期待できず、黒鉛は溶鋼に溶解し易いという問題がある
。For example, the boron nitride-containing refractory described in Japanese Patent Application Laid-Open No. 55-34663 contains graphite, so no improvement in strength can be expected, and graphite easily dissolves in molten steel.
また、特開昭５６−１２０５７５号公挫に記載の耐火物
は窒化珪素を６０〜９０重量％含有しており、充分なる
強度を存しているが、溶鋼に対する耐食性に間題がある
。Further, the refractory described in JP-A-56-120575 contains 60 to 90% by weight of silicon nitride and has sufficient strength, but there is a problem in corrosion resistance against molten steel.
特開昭５６−１３９２６０号公報の場合には、黒鉛ある
いは炭化珪素と共に、結合強度を増大させるために金属
珪素のみが添加されている。これらの添加物から形成さ
れるβ−Ｓｉ Ｃ、５ｉ３Ｎｓ、 ５ｉｉＯＮｚのボン
ドは溶ＫＡに対する耐食性、耐スポーリング性を劣化さ
せる。In the case of JP-A-56-139260, only metallic silicon is added together with graphite or silicon carbide to increase bonding strength. Bonds of β-Si C, 5i3Ns, and 5iiONz formed from these additives deteriorate corrosion resistance and spalling resistance against molten KA.
このように、窒化硼素含有耐火物の耐スポーリング性、
耐食性を充分に発揮させる結合材として金属珪素のみで
は不充分であり、金属アルミニウムの使用が不可欠とな
る。In this way, the spalling resistance of boron nitride-containing refractories,
Metallic silicon alone is insufficient as a bonding material to exhibit sufficient corrosion resistance, and the use of metallic aluminum is essential.
特開昭５９−１６９９８２号公報において記載されてい
るように、金属アルミニウムはＡＩａＣｓ、 ＡＩＮ、
ＩｄＪｘに変化するが、ＡＺ４Ｃｆｆ、 ＡＩＮのみ
の存在では耐消化性の問題が生じる。As described in JP-A-59-169982, metal aluminum is AIaCs, AIN,
However, the presence of only AZ4Cff and AIN causes problems with digestion resistance.
Ｃ問題点を解決するための手段〕
本発明は窒化硼素含有耐火物において、耐スポーリング
性と耐食性を充分に発揮させるための結合材として添加
される金属アルミニウムによる消化性の問題を解決する
ための手段としマ、金属珪素との併用がを効であるとい
う知見に基づいて完成したものである。Means for Solving Problem C] The present invention solves the problem of digestibility caused by metallic aluminum added as a binder in order to fully exhibit spalling resistance and corrosion resistance in boron nitride-containing refractories. This was completed based on the knowledge that the combination of metal silicon and metal silicon is effective.
金属アルミニウムと金属珪素との添加重量比Ａｌ／Ｓｉ
が２０／１より大きいと、金属アルミニウムによる消化
現象の防止効果がない。他方、Ａｌ ／ Ｓ ｉが１／
１より小さいと耐食性、耐久ポーリング性が低下する。Addition weight ratio Al/Si of metal aluminum and metal silicon
When the ratio is larger than 20/1, there is no effect of preventing the digestion phenomenon caused by metallic aluminum. On the other hand, Al/S i is 1/
If it is less than 1, corrosion resistance and durable poling properties will decrease.
窒化硼素としては、耐スポーリング及びコストの面から
六方晶であることが望ましいが、立方晶。Boron nitride is desirably hexagonal from the standpoint of spalling resistance and cost, but cubic crystal is preferable.
無定形のものも板状でないため、耐スポーリング性の点
に注意すれば使用可能である。Since amorphous materials are not plate-like, they can be used as long as care is taken in terms of spalling resistance.
窒化硼素の添加量は、２０重量％未満では窒化硼素の添
加による耐久ポーリング性と耐食性との改善効果がなく
なり、耐久ポーリング性、耐孔閉塞性、自己潤滑性が低
下するので２０重量％以上の添加が必要である。If the amount of boron nitride added is less than 20% by weight, the effect of improving the durable poling property and corrosion resistance by adding boron nitride will be lost, and the durable poling property, pore clogging resistance, and self-lubricating property will decrease. Addition is necessary.
本発明においては種Ｈの骨材が使用可能であるが、以上
の窒化硼素、金属アルミニウム、それに金属珪素と組み
合わせて強度向上に効果がある骨材としてＡｌ２Ｏ，、
スピネル＋ＡＩＮがある。In the present invention, type H aggregate can be used, but aggregates that are effective in improving strength when combined with the above boron nitride, metal aluminum, and metal silicon include Al2O,...
There is spinel + AIN.
これに対してＭｇＯは熱膨張が大きく、Ｍから生成され
るＡＩｚＱ３と反応して二次スピネルを生じ焼成膨張が
太き（なるという問題がある。On the other hand, MgO has a large thermal expansion, and reacts with AIzQ3 produced from M to form secondary spinel, resulting in a large firing expansion.
また、ムライト、シリカ等の５ｉｆｔを多く含む骨材の
場合には、ＭによるＳｉＯ□の還元作用により骨材をポ
ーラス化させて強度の低下、耐食性の低下をもたらす。In addition, in the case of aggregates containing a large amount of 5ift, such as mullite and silica, the reducing action of SiO□ by M causes the aggregates to become porous, resulting in a decrease in strength and corrosion resistance.
ジルコニア、ジルコン等のＺｒＯ，を含む骨材を使用す
る場合、ＭによるＺｒＯ□の還元作用により焼成トラブ
ルが発生し製造が困難である。When using aggregates containing ZrO, such as zirconia and zircon, the reduction of ZrO□ by M causes firing troubles, making production difficult.
更に、他の骨材としてＳｉＣ，５ｉ３Ｌ等がある。Furthermore, other aggregates include SiC, 5i3L, etc.
しかし、これらの骨材は溶鉄に溶解し、耐食性の点で好
ましくない。However, these aggregates dissolve in molten iron, making them unfavorable in terms of corrosion resistance.
以上の耐食性、耐スポーリング性１歩留りを満足させる
骨材としてのＡｌ、Ｏ，、スピネル、 Ａ７Ｎは、その
量が全量の１０重１％より少なければ強度向上効果が少
なく、６０重量％以上では耐スポーリング性が低下する
。コスト面を考えると、Ａｌ２Ｏ３，スピネルの方が４
７Ｎよりは優位である。Al, O, spinel, and A7N as aggregates that satisfy the above corrosion resistance and spalling resistance 1 yield have little effect on improving strength if the amount is less than 1% by weight of the total amount, and if it is more than 60% by weight. Spalling resistance decreases. Considering the cost, Al2O3 and spinel are 4
It is superior to 7N.
製造に際しての配合物の混線についていえば、配合物が
微粉のみからなるものであるため、造粒工程を必要とす
るスパルタンミキサー、ヘンシェルミキサー等の造粒ミ
キサーを使用することができる。Regarding mixing of the blend during production, since the blend consists only of fine powder, a granulation mixer such as a Spartan mixer or a Henschel mixer that requires a granulation step can be used.
成形は、ラバー・プレスを品質の均一性の点より主に使
用するが、形状等によりダイナミックプレス、オイルプ
レス等も採用可能である。For molding, a rubber press is mainly used to ensure uniform quality, but depending on the shape etc., dynamic presses, oil presses, etc. can also be used.
また、焼成に際しては、配合物が窒化硼素、金属アルミ
ニウム、金属珪素等を使用しており、当然のことながら
、酸化雲囲気下の焼成は不可である。窒化雰囲気の焼成
も可能であるが、焼成物は強度が２０％程度低下し、雰
囲気の保持のため多量の窒素が必要である。従って、コ
スト面からいってもサヤ内での焼成が望ましい。Further, during firing, the compound uses boron nitride, metal aluminum, metal silicon, etc., and as a matter of course, firing under an oxide cloud atmosphere is not possible. Firing in a nitriding atmosphere is also possible, but the strength of the fired product decreases by about 20% and a large amount of nitrogen is required to maintain the atmosphere. Therefore, from a cost standpoint, firing in the pod is desirable.
焼成時のサヤ内の充填材としては、非酸化性雰囲気下に
保つものであればよく、コークス粉、鱗状黒鉛、黒鉛電
極切削屑等使用可能であり、カーボン粉末の種類を限定
するものではない。The filling material in the pod during firing may be any material that can be maintained in a non-oxidizing atmosphere, such as coke powder, graphite scales, graphite electrode cuttings, etc., and the type of carbon powder is not limited. .
第１表に示す配合物を造粒、ラバープレス成形後、１４
５０℃のコークス中で焼成した。After granulation and rubber press molding of the formulation shown in Table 1, 14
Calcined in coke at 50°C.
アルミナ添加量が１０重量％より少ないと、比較例１．
２の場合を実施例１と比較して明らかなように強度向上
の効果はない。またアルミナ添加量が６０重量％を超す
と実施例３と比較例３との比較から明らかなようにより
耐スポーリング性が低下する。When the amount of alumina added was less than 10% by weight, Comparative Example 1.
As is clear from comparing case 2 with Example 1, there is no effect of improving strength. Furthermore, if the amount of alumina added exceeds 60% by weight, the spalling resistance is further reduced as is clear from the comparison between Example 3 and Comparative Example 3.
窒化硼素の添加量については、実施例４と比較例６との
比較から、２０重皿％より少ないと耐スポーリング性が
低下することが判る。アルミナの代わりにスピネルを使
用することは問題ない。Regarding the amount of boron nitride added, a comparison between Example 4 and Comparative Example 6 shows that spalling resistance decreases when the amount is less than 20%. There is no problem using spinel instead of alumina.
Ｍ及びＳｉの添加量が１０重量％より少ないと、比較例
４を実施例７と比較して明らかな通り、より強度が低下
する。また耐摩耗性も低下する。５０重量％より多いと
実施例８と比較例５とを比較して耐スポーリング性が低
下していることが判る。When the amount of M and Si added is less than 10% by weight, as is clear from comparing Comparative Example 4 with Example 7, the strength is further reduced. In addition, wear resistance also decreases. Comparing Example 8 and Comparative Example 5, it can be seen that when the amount exceeds 50% by weight, the spalling resistance decreases.
更に、第２表に示すような配合を第１表に示す場合と同
一方法で製造した。Furthermore, the formulations shown in Table 2 were manufactured in the same manner as shown in Table 1.
Ａｌ／ Ｓ ｉ比が２０／１より裔いと消化しやすくな
り、１／１より低いとＳｉの性質が強くなるため、耐食
性、耐スポーリング性が共に低下していることが判る。It can be seen that when the Al/Si ratio is 20/1, it becomes easier to digest, and when it is lower than 1/1, the properties of Si become stronger, so that both corrosion resistance and spalling resistance are decreased.
次に、第３表に示すような焼結体を用いてタンデイツシ
ュノズル（口径：２０ｍ、肉厚：１５ｍ１＋、長さ：
１００ ｒ＠ｍ）と保護管（内径：２０ｆｌ、外径：４
Ｑｍｍ。Next, a tundish nozzle (diameter: 20 m, wall thickness: 15 m1+, length:
100 r@m) and protection tube (inner diameter: 20 fl, outer diameter: 4
Qmm.
長さ；１Ｉ１１）を作製した。A length of 1I11) was produced.
比較例１の場合には、クンデイツシュノズルでは耐摩耗
性不足により口径拡大、保護管では強度不足による折損
の発生があった。In the case of Comparative Example 1, the Kundeitz nozzle had an enlarged diameter due to insufficient wear resistance, and the protective tube had breakage due to insufficient strength.
比較例６は窒化硼素量の不足により、Ｍの添加による孔
閉塞の発生を見た。In Comparative Example 6, pore clogging occurred due to the addition of M due to an insufficient amount of boron nitride.
比較例３の場合には、耐久ポーリング性の不足により亀
裂の発生、折損を見た。In the case of Comparative Example 3, cracking and breakage were observed due to insufficient poling durability.
比較例５も耐スポーリング性の不足により折損した。Comparative Example 5 also broke due to lack of spalling resistance.
本発明の製造方法によれば、窒化硼素と金属アルミニウ
ムと金属珪素とを組み合わせて添加する還元焼成品の欠
点である強度、耐摩耗性の不足の問題が解消し、かつ耐
食性、耐スポーリング性。According to the manufacturing method of the present invention, the problem of lack of strength and wear resistance, which is a drawback of reduction fired products made by adding a combination of boron nitride, metal aluminum, and metal silicon, can be solved, and the problems of lack of corrosion resistance and spalling resistance can be solved. .
耐孔閉塞性も問題ないものとなった。The pore clogging resistance was also satisfactory.
Claims (1)
しくはＡｌ＿２Ｏ＿３−ＭｇＯのスピネルもしくはＡｌ
Ｎの一種もしくは二種以上を１０〜６０重量％と、Ａｌ
／Ｓｉ比を２０／１〜１／１の範囲内で混合又は合金化
したＡｌ及びＳｉの粉末を１０〜５０重量％で配合し、
成形後非酸化性雰囲気中で焼成することを特徴とする窒
化硼素含有耐火物の製造方法。 ２、窒化硼素が六方晶系であることを特徴とする特許請
求の範囲第１項に記載の窒化硼素含有耐火物の製造方法
。 ３、非酸化性雰囲気としてカーボン粉を用いることを特
徴とする特許請求の範囲第１項に記載の窒化硼素含有耐
火物の製造方法。[Claims] 1. 20% by weight or more of boron nitride powder and spinel of Al_2O_3 or Al_2O_3-MgO or Al
10 to 60% by weight of one or more types of N and Al
10 to 50% by weight of Al and Si powder mixed or alloyed with a /Si ratio of 20/1 to 1/1 is blended,
A method for producing a boron nitride-containing refractory, which comprises firing in a non-oxidizing atmosphere after forming. 2. The method for producing a boron nitride-containing refractory according to claim 1, wherein the boron nitride has a hexagonal system. 3. The method for producing a boron nitride-containing refractory according to claim 1, characterized in that carbon powder is used as the non-oxidizing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61145548A JPH0753607B2 (en) | 1986-06-21 | 1986-06-21 | Method for manufacturing refractory material containing boron nitride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61145548A JPH0753607B2 (en) | 1986-06-21 | 1986-06-21 | Method for manufacturing refractory material containing boron nitride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS632858A true JPS632858A (en) | 1988-01-07 |
| JPH0753607B2 JPH0753607B2 (en) | 1995-06-07 |
Family
ID=15387727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61145548A Expired - Lifetime JPH0753607B2 (en) | 1986-06-21 | 1986-06-21 | Method for manufacturing refractory material containing boron nitride |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753607B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0244067A (en) * | 1988-08-04 | 1990-02-14 | Koransha Co Ltd | Bn no-pressure sintered ceramic having excellent melting flacture resistance |
| JPH02111665A (en) * | 1988-10-19 | 1990-04-24 | Koransha Co Ltd | Production of dissolution loss-resistant bn ceramics |
| WO1990005122A1 (en) * | 1988-11-10 | 1990-05-17 | Kabushiki Kaisha Kouransha | Boron nitride ceramic having excellent resistance against fusing damage |
| US5389587A (en) * | 1988-11-10 | 1995-02-14 | Kabushiki Kaisha Kouransha | BN-group ceramics having excellent resistance to loss by dissolving |
| WO2011059020A1 (en) * | 2009-11-11 | 2011-05-19 | 株式会社タンガロイ | Cubic boron nitride sintered compact, coated cubic boron nitride sintered compact, method for producing cubic boron nitride sintered compact, and method for producing coated cubic boron nitride sintered compact |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861256A (en) * | 1981-10-07 | 1983-04-12 | Mitsubishi Metal Corp | High-toughness boron nitride-base material sintered under superhigh pressure for cutting tool and wear resistant tool |
-
1986
- 1986-06-21 JP JP61145548A patent/JPH0753607B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861256A (en) * | 1981-10-07 | 1983-04-12 | Mitsubishi Metal Corp | High-toughness boron nitride-base material sintered under superhigh pressure for cutting tool and wear resistant tool |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0244067A (en) * | 1988-08-04 | 1990-02-14 | Koransha Co Ltd | Bn no-pressure sintered ceramic having excellent melting flacture resistance |
| JPH02111665A (en) * | 1988-10-19 | 1990-04-24 | Koransha Co Ltd | Production of dissolution loss-resistant bn ceramics |
| WO1990005122A1 (en) * | 1988-11-10 | 1990-05-17 | Kabushiki Kaisha Kouransha | Boron nitride ceramic having excellent resistance against fusing damage |
| EP0396779A1 (en) * | 1988-11-10 | 1990-11-14 | Kabushiki Kaisha Kouransha | Boron nitride ceramic having excellent resistance against fusing damage |
| US5389587A (en) * | 1988-11-10 | 1995-02-14 | Kabushiki Kaisha Kouransha | BN-group ceramics having excellent resistance to loss by dissolving |
| EP0396779B1 (en) * | 1988-11-10 | 1995-06-28 | Kabushiki Kaisha Kouransha | Boron nitride ceramic having excellent resistance against fusing damage |
| WO2011059020A1 (en) * | 2009-11-11 | 2011-05-19 | 株式会社タンガロイ | Cubic boron nitride sintered compact, coated cubic boron nitride sintered compact, method for producing cubic boron nitride sintered compact, and method for producing coated cubic boron nitride sintered compact |
| US8814965B2 (en) | 2009-11-11 | 2014-08-26 | Tungaloy Corporation | Cubic boron nitride sintered body and coated cubic boron nitride sintered body and preparation processes thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753607B2 (en) | 1995-06-07 |
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