JPH04240162A - Silicon nitride-based body for tool - Google Patents
Silicon nitride-based body for toolInfo
- Publication number
- JPH04240162A JPH04240162A JP3022872A JP2287291A JPH04240162A JP H04240162 A JPH04240162 A JP H04240162A JP 3022872 A JP3022872 A JP 3022872A JP 2287291 A JP2287291 A JP 2287291A JP H04240162 A JPH04240162 A JP H04240162A
- Authority
- JP
- Japan
- Prior art keywords
- silicon nitride
- hafnium
- based sintered
- oxide
- sintered body
- 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
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 43
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 39
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 6
- TWRSDLOICOIGRH-UHFFFAOYSA-N [Si].[Si].[Hf] Chemical compound [Si].[Si].[Hf] TWRSDLOICOIGRH-UHFFFAOYSA-N 0.000 claims abstract description 5
- -1 hafnium nitride Chemical class 0.000 claims abstract description 5
- 229910000449 hafnium oxide Inorganic materials 0.000 claims abstract description 5
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims abstract description 5
- WHJFNYXPKGDKBB-UHFFFAOYSA-N hafnium;methane Chemical compound C.[Hf] WHJFNYXPKGDKBB-UHFFFAOYSA-N 0.000 claims abstract description 5
- LRTTZMZPZHBOPO-UHFFFAOYSA-N [B].[B].[Hf] Chemical compound [B].[B].[Hf] LRTTZMZPZHBOPO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000006104 solid solution Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 150000002363 hafnium compounds Chemical class 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 230000035939 shock Effects 0.000 description 6
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PDPJQWYGJJBYLF-UHFFFAOYSA-J hafnium tetrachloride Chemical compound Cl[Hf](Cl)(Cl)Cl PDPJQWYGJJBYLF-UHFFFAOYSA-J 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Ceramic Products (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、旋削工具，フライス工
具，ドリル，エンドミルなどの切削工具、又は缶成形用
型，スリッター，などの耐摩耗工具として最適な工具用
窒化ケイ素基燒結体に関するものである。[Field of Industrial Application] The present invention relates to a silicon nitride-based sintered body for tools, which is ideal for cutting tools such as turning tools, milling tools, drills, and end mills, or wear-resistant tools such as can forming molds and slitters. It is.
【０００２】0002
【従来の技術】一般に、窒化ケイ素基燒結体は、そのす
ぐれた機械的強度，耐熱性及び耐熱衝撃性によりタービ
ン翼やエンジン部品、又は耐摩耗工具や切削工具として
実用されている。2. Description of the Related Art Generally, silicon nitride-based sintered bodies are used in turbine blades, engine parts, wear-resistant tools, and cutting tools due to their excellent mechanical strength, heat resistance, and thermal shock resistance.
【０００３】しかしながら、これら従来の窒化ケイ素基
燒結体は、耐熱衝撃性及び高温における機械的強度が満
足できないとてう問題がある。However, these conventional silicon nitride-based sintered bodies have the problem of unsatisfactory thermal shock resistance and mechanical strength at high temperatures.
【０００４】この問題を解決しようとした代表的な窒化
ケイ素基燒結体が特開昭５７−２００２６６号公報及び
特開昭６２−１５３１６９号公報で提案されいる。Typical silicon nitride-based sintered bodies intended to solve this problem have been proposed in Japanese Patent Laid-Open Nos. 57-200266 and 62-153169.
【０００５】[0005]
【発明が解決しようとする課題】特開昭５７−２００２
６６号公報には、酸化イツトリウムと酸化アルミニウム
と窒化アルミニウムと、その他の金属の酸化物又は炭化
物の１種と、残部が窒化ケイ素からなる窒化ケイ素基燒
結体が開示されている。[Problem to be solved by the invention] JP-A-57-2002
No. 66 discloses a silicon nitride-based sintered body consisting of yttrium oxide, aluminum oxide, aluminum nitride, one of the oxides or carbides of other metals, and the remainder silicon nitride.
【０００６】また、特開昭６２−１５３１６９号公報に
は、希土類元素の酸化物と、Ｈｆ，Ｔａ又はＮｂの酸化
物，炭化物，ケイ化物の群から選ばれた少なくとも１種
と、残部が窒化ケイ素よりなるセラミックス混合物を焼
成してなる窒化ケイ素基燒結体が開示されている。Furthermore, JP-A No. 62-153169 discloses that oxides of rare earth elements, at least one selected from the group of oxides, carbides, and silicides of Hf, Ta or Nb, and the remainder nitrided. A silicon nitride-based sintered body formed by firing a ceramic mixture made of silicon is disclosed.
【０００７】これらの窒化ケイ素基燒結体は、Ｈｆの酸
化物，炭化物と、必要に応じて窒化アルミニウムを含有
させるか、もしくは窒化アルミニウムと酸化アルミニウ
ムの両方を含有させることにより、従来の窒化ケイ素基
燒結体に比べて、耐熱衝撃性及び高温における機械的強
度を高めることに成功したすぐれた燒結体である。These silicon nitride-based sintered bodies contain Hf oxides and carbides and, if necessary, aluminum nitride, or contain both aluminum nitride and aluminum oxide, thereby improving the conventional silicon nitride-based sintered bodies. This is an excellent sintered body that has succeeded in increasing thermal shock resistance and mechanical strength at high temperatures compared to sintered bodies.
【０００８】しかしながら、これら特開昭５７−２００
２６６号公報及び特開昭６２−１５３１６９号公報に開
示の窒化ケイ素基燒結体は、高温における耐摩耗性及び
機械的強度、特に切削工具のように刃先が１０００℃以
上の高温になる場合における耐摩耗性及び機械的強度の
劣下が著しく短寿命になるという問題がある。However, these Japanese Patent Application Laid-open No. 57-200
The silicon nitride-based sintered bodies disclosed in JP-A No. 266 and JP-A-62-153169 have excellent wear resistance and mechanical strength at high temperatures, especially when the cutting edge is exposed to high temperatures of 1000°C or higher, such as in cutting tools. There is a problem in that wear resistance and mechanical strength deteriorate, resulting in a significantly shortened life.
【０００９】本発明は、上述ような問題点を解決したも
ので、具体的には、窒化ケイ素に、酸化アルミニウムと
ハフニウム化合物との両者を最適量組合わせて含有させ
ることにより、工具用として適するようにした窒化ケイ
素基燒結体の提供を目的とするものである。The present invention solves the above-mentioned problems, and specifically, contains silicon nitride in an optimal amount of both aluminum oxide and a hafnium compound, thereby making it suitable for tools. The object of the present invention is to provide a silicon nitride-based sintered body as described above.
【００１０】0010
【課題を解決するための手段】本発明者らは、高靭性を
有する窒化ケイ素基燒結体の長所を利用し、かつ窒化ケ
イ素の鉄との親和性の高さから鉄系材料を被削材とする
切削工具には満足できないという短所を解決する方向で
検討していた所、理由は、明確ではないが、窒化ケイ素
基燒結体に窒化アルミニウムを含有させると、切削時の
耐摩耗性の低下が著しいという第１の知見を得たもので
ある。[Means for Solving the Problems] The present inventors utilized the advantages of silicon nitride-based sintered bodies having high toughness, and took advantage of the high affinity of silicon nitride with iron to use iron-based materials as work materials. We were considering ways to solve the problem of not being satisfied with the cutting tools used for cutting, and although the reason is not clear, when silicon nitride-based sintered bodies contain aluminum nitride, the wear resistance during cutting decreases. The first finding was that this was significant.
【００１１】また、窒化ケイ素に酸化アルミニウムとハ
フニウム化合物とを適量含有させると靭性と耐摩耗性が
バランスよくすぐれるようになり、しかも鉄系材料を被
削材とする切削工具としても充分にすぐれた効果を発揮
するという第２の知見を得たものである。本発明は、上
述の第１及び第２の知見に基づいて完成するに至ったも
のである。[0011] Furthermore, when silicon nitride contains an appropriate amount of aluminum oxide and a hafnium compound, toughness and wear resistance are excellent in a well-balanced manner, and moreover, it is sufficiently excellent as a cutting tool for cutting iron-based materials. This is the second finding that shows the effectiveness of this method. The present invention has been completed based on the above-mentioned first and second findings.
【００１２】すなわち、本発明の工具用窒化ケイ素基燒
結体は、重量％で、希土類元素の酸化物８％以下と酸化
アルミニウム１０％以下と酸化ハフニウム，窒化ハフニ
ウム，炭化ハフニニウム，ケイ化ハフニウム，ホウ化ハ
フニウム及びこれらの相互固溶体の中の少なくとも１種
８％以下と、残りが窒化ケイ素と不可避不純物とからな
ることを特徴とするものである。That is, the silicon nitride-based sintered body for tools of the present invention contains, by weight, 8% or less of rare earth element oxides, 10% or less of aluminum oxide, and hafnium oxide, hafnium nitride, hafnium carbide, hafnium silicide, and boron. It is characterized by comprising 8% or less of at least one of hafnium chloride and a mutual solid solution thereof, and the remainder consisting of silicon nitride and inevitable impurities.
【００１３】この本発明における希土類元素の酸化物は
、燒結を促進させるのに効果があり、具体的にはＳｃ，
Ｙ，ランタノイドの酸化物からなり、この中でも、例え
ば酸化イツトリウム，酸化セリウムが好ましく、この含
有量が８％を超えて多くなると得られる燒結体の機械的
強度及び耐熱衝撃性の低下が著しくなる。希土類元素の
酸化物の好ましい含有量は、１〜７％、特に好ましくは
、２〜６％である。[0013] The rare earth element oxide in the present invention is effective in promoting sintering, and specifically, Sc,
It consists of oxides of Y and lanthanoids, and among these, for example, yttrium oxide and cerium oxide are preferable.If the content exceeds 8%, the mechanical strength and thermal shock resistance of the obtained sintered body will be significantly reduced. The preferred content of rare earth element oxides is 1 to 7%, particularly preferably 2 to 6%.
【００１４】また、本発明における酸化アルミニウムは
、燒結を促進させると共に、耐摩耗性の向上に寄与する
もので、この含有量が１０％を超えて多くなると高温に
おける機械的強度及び耐熱衝撃性の低下が著しくなる。
酸化アルミニウムの好ましい含有量は、１〜１０％、特
に好ましくは２〜８％である。[0014] Furthermore, aluminum oxide in the present invention promotes sintering and contributes to improving wear resistance, and when the content exceeds 10%, mechanical strength and thermal shock resistance at high temperatures deteriorate. The decline becomes significant. The preferred content of aluminum oxide is 1 to 10%, particularly preferably 2 to 8%.
【００１５】さらに、本発明における酸化ハフニウム，
窒化ハフニウム，炭化ハフニウム，ケイ化ハフニウム，
ホウ化ハフニウム及びこれらの相互固溶体の中の少なく
とも１種からなるハフニウム化合物は、高温における強
度の向上に寄与すると共に燒結の促進にも効果を発揮す
るもので、この含有量が８％を超えて多くなると窒化ケ
イ素粒界に高融点ガラス相が多量に発生して高温時の強
度低下が著しくなる。このハフニウム化合物の好ましい
含有量は、０．５〜５％、特に好ましくは１〜４％であ
る。Furthermore, hafnium oxide in the present invention,
hafnium nitride, hafnium carbide, hafnium silicide,
A hafnium compound consisting of at least one of hafnium boride and their mutual solid solution contributes to improving strength at high temperatures and is also effective in promoting sintering. If the amount increases, a large amount of high melting point glass phase will occur at the silicon nitride grain boundaries, resulting in a significant decrease in strength at high temperatures. The preferred content of this hafnium compound is 0.5 to 5%, particularly preferably 1 to 4%.
【００１６】本発明の工具用窒化ケイ素基燒結体は、従
来からの粉末冶金法を応用することにより作製すること
ができる。例えば、出発物質の内、窒化ケイ素は、α−
窒化ケイ素，β−窒化ケイ素又はこれらの混合物でもよ
く、酸化アルミニウムは、α−酸化アルミニウム，β−
酸化アルミニウム，γ−酸化アルミニウムを用いること
ができる。これらの窒化ケイ素や酸化アルミニウムと他
の出発物質の粒径は、出来るだけ微細なものが好ましく
、具体的には、数μｍ以下、より好ましくはサブミクロ
ンの粉末を用いるのが好ましく、一部の窒化ケイ素，酸
化アルミニウム又はハフニウム化合物をウイスカー状の
ものとして用いることは、さらによりも好ましいことで
ある。The silicon nitride-based sintered body for tools of the present invention can be produced by applying conventional powder metallurgy methods. For example, among the starting materials, silicon nitride is α-
It may be silicon nitride, β-silicon nitride or a mixture thereof; aluminum oxide may be α-aluminum oxide, β-silicon nitride or a mixture thereof;
Aluminum oxide and γ-aluminum oxide can be used. The particle size of these silicon nitride, aluminum oxide, and other starting materials is preferably as fine as possible. Specifically, it is preferable to use powder of several μm or less, more preferably submicron. It is even more preferred to use silicon nitride, aluminum oxide or hafnium compounds in whisker form.
【００１７】これらの出発物質の混合及び成形は、従来
の粉末冶金の方法により行うこと、燒結は、常圧燒結法
，ホットプレス法，雰囲気加圧燒結法，減圧燒結法、又
はこれらの燒結法と熱間静水圧燒結法（ＨＩＰ法）によ
って行うこと、特に粒成長を抑制することが好ましいこ
とから、１６００〜１８５０℃の温度で燒結し、その後
必要に応じて燒結温度よりも低い温度でＨＩＰ処理する
方法である。Mixing and shaping of these starting materials are carried out by conventional powder metallurgy methods, and sintering is carried out by normal pressure sintering, hot pressing, atmospheric pressure sintering, vacuum sintering, or any of these sintering methods. Since it is preferable to suppress grain growth, sintering is performed at a temperature of 1600 to 1850°C, and then HIP is performed at a temperature lower than the sintering temperature as necessary. It is a method of processing.
【００１８】[0018]
【作用】本発明の工具用窒化ケイ素基燒結体は、希土類
元素の酸化物，酸化アルミニウム及びハフニウム化合物
が燒結を促進させる作用をし、酸化アルミニウムが主と
して高温における耐摩耗性を向上させる作用をし、ハフ
ニウム化合物が主として高温における強度及び耐熱衝撃
性を向上させる作用をしているものである。[Function] In the silicon nitride-based sintered body for tools of the present invention, rare earth element oxides, aluminum oxide, and hafnium compounds act to promote sintering, and aluminum oxide mainly acts to improve wear resistance at high temperatures. The hafnium compound mainly functions to improve strength and thermal shock resistance at high temperatures.
【００１９】[0019]
【実施例】β−Ｓｉ３Ｎ４が５％−残りα−Ｓｉ３Ｎ４
でなる平均粒径０．７μｍの窒化ケイ素粉末と、平均粒
径０．５μｍの酸化イツトリウム粉末と、平均粒径０．
８〜１．２μｍの酸化ハフニウム，炭化ハフニウム，窒
化ハフニウム，ケイ化ハフニウム，ホウ化ハフニウムの
各粉末と、平均粒径０．５μｍの酸化アルミニウム粉末
と、平均粒径０．５μｍの窒化アルミニウム粉末を用い
て、表１に示した組成成分に各試料を配合した。[Example] β-Si3N4 is 5% - remaining α-Si3N4
silicon nitride powder with an average particle size of 0.7 μm; yttrium oxide powder with an average particle size of 0.5 μm;
Hafnium oxide, hafnium carbide, hafnium nitride, hafnium silicide, and hafnium boride powders of 8 to 1.2 μm, aluminum oxide powder with an average particle size of 0.5 μm, and aluminum nitride powder with an average particle size of 0.5 μm. Each sample was blended with the composition components shown in Table 1.
【００２０】この各試料をボールミル混合及び１ｔ／ｃ
ｍ２の圧力で所定形状に成形し、粉末成形体とした後、
窒素ガス雰囲気中、１８００℃，１２０分保持で常圧燒
結し、さらに１０００気圧の窒素ガス雰囲気中１７５０
℃，３０分保持でＨＩＰ処理して、本発明品１〜９及び
比較品１〜７を得た。[0020] Each sample was mixed in a ball mill and 1t/c
After molding into a predetermined shape with a pressure of m2 to make a powder compact,
Sintered at 1800°C for 120 minutes in a nitrogen gas atmosphere, then sintered at 1750°C in a nitrogen gas atmosphere of 1000 atm.
A HIP treatment was performed by holding the sample at a temperature of 30 minutes to obtain products 1 to 9 of the present invention and comparative products 1 to 7.
【００２１】[0021]
【表１】
こうして得た本発明品１〜５及び比較品１〜７の室温に
おける抗折強度を測定すると共に、下記（Ａ）及び（Ｂ
）条件による切削試験を行って、これらの結果を表２に
示した。[Table 1] The bending strengths at room temperature of the thus obtained invention products 1 to 5 and comparative products 1 to 7 were measured, and the following (A) and (B
) A cutting test was conducted under the following conditions, and the results are shown in Table 2.
【００２２】
（Ａ）耐摩耗性の切削試験
チップ形状：ＳＮＧＮ１２０４０８
被削材 ：ＦＣ３５
切削速度 ：５００ｍ／ｍｉｎ
切込み ：１．５ｍｍ 送り
：０．３ｍｍ／ｒｅｖ 評
価 ：２分間切削後の平均逃げ面摩耗量で比
較 （Ｂ）耐欠損性の切削試験
チップ形状：ＳＮＧＮ１２０４０
８ 被削材 ：ＦＣＤ６０（
Ｗ４０×Ｌ２００面を１パス） 切
削速度 ：１５０ｍ／ｍｉｎ 切
込み ：１．５ｍｍ 評価
：０．１５ｍｍ／ｒｅｖの送りで開始し、１
パス切削時の
衝撃に耐えた場合は、０．０４の送りを増加させ
、欠損
時の送りで比較（３回の平均値）(A) Wear resistance cutting test Chip shape: SNGN120408
Work material: FC35
Cutting speed: 500m/min
Depth of cut: 1.5mm feed
: 0.3mm/rev Evaluation: Comparison of average flank wear amount after 2 minutes of cutting (B) Cutting test for chipping resistance Chip shape: SNGN12040
8 Work material: FCD60 (
(1 pass on W40 x L200 surface) Cutting speed: 150m/min Depth of cut: 1.5mm Evaluation
:Start with a feed of 0.15mm/rev, 1
During pass cutting
If it withstands the impact, increase the feed by 0.04 and remove the defect.
Comparison by time advance (average value of 3 times)
【００２３】[0023]
【表２】[Table 2]
【００２４】[0024]
【発明の効果】本発明の工具用窒化ケイ素基燒結体は、
室温における抗折強度が従来の窒化ケイ素基燒結体と比
べて略等しく、本発明から外れた窒化ケイ素基燒結体と
比べて僅かにすぐれた傾向にある。[Effects of the invention] The silicon nitride-based sintered body for tools of the present invention is
The bending strength at room temperature is approximately the same as that of conventional silicon nitride-based sintered bodies, and tends to be slightly superior to that of silicon nitride-based sintered bodies that are outside the scope of the present invention.
【００２５】また、従来の窒化ケイ素基燒結体及び本発
明から外れた窒化ケイ素基燒結体が鉄系材料を切削した
場合に、耐摩耗性にすぐれると耐欠損性で短寿命になる
こと、逆に耐欠損性にすぐれるようになると耐摩耗性で
短寿命になるという二律背反的傾向にあるのに対し、本
発明の工具用窒化ケイ素基燒結体は、耐摩耗性と耐欠損
性がバランスよくすぐれているという効果がある。この
ことから、本発明の工具用窒化ケイ素基燒結体は、切削
工具用としては勿論のこと、切断加工又は成形加工用と
しての耐摩耗性にも効果が期待できる産業上有用な材料
である。[0025] Furthermore, when conventional silicon nitride-based sintered bodies and silicon nitride-based sintered bodies that differ from the present invention have excellent wear resistance when cutting iron-based materials, they have excellent chipping resistance and a short life. On the other hand, there is a trade-off between having excellent fracture resistance and wear resistance resulting in a short life.However, the silicon nitride-based sintered body for tools of the present invention has a balance between wear resistance and fracture resistance. It has the effect of being very good. For this reason, the silicon nitride-based sintered body for tools of the present invention is an industrially useful material that can be expected to be effective in wear resistance not only for cutting tools but also for cutting or molding.
Claims (1)
下と酸化アルミニウム１０％と酸化ハフニウム，窒化ハ
フニウム，炭化ハフニニウム，ケイ化ハフニウム，ホウ
化ハフニウム及びこれらの相互固溶体の中の少なくとも
１種８％以下と、残りが窒化ケイ素と不可避不純物とか
らになることを特徴とする工具用窒化ケイ素基燒結体。Claim 1: In weight percent, 8% or less of an oxide of a rare earth element, 10% of aluminum oxide, and at least one of hafnium oxide, hafnium nitride, hafnium carbide, hafnium silicide, hafnium boride, and a mutual solid solution thereof. A silicon nitride-based sintered body for tools, characterized in that the content is 8% or less, with the remainder consisting of silicon nitride and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3022872A JPH04240162A (en) | 1991-01-23 | 1991-01-23 | Silicon nitride-based body for tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3022872A JPH04240162A (en) | 1991-01-23 | 1991-01-23 | Silicon nitride-based body for tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04240162A true JPH04240162A (en) | 1992-08-27 |
Family
ID=12094788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3022872A Pending JPH04240162A (en) | 1991-01-23 | 1991-01-23 | Silicon nitride-based body for tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04240162A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010052110A (en) * | 2008-08-29 | 2010-03-11 | Shimane Prefecture | Sintered body |
-
1991
- 1991-01-23 JP JP3022872A patent/JPH04240162A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010052110A (en) * | 2008-08-29 | 2010-03-11 | Shimane Prefecture | Sintered body |
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