JPH0891936A - Sintered material of boron nitride of cubic system - Google Patents
Sintered material of boron nitride of cubic systemInfo
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- JPH0891936A JPH0891936A JP6234866A JP23486694A JPH0891936A JP H0891936 A JPH0891936 A JP H0891936A JP 6234866 A JP6234866 A JP 6234866A JP 23486694 A JP23486694 A JP 23486694A JP H0891936 A JPH0891936 A JP H0891936A
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- group
- periodic table
- boron nitride
- nitride
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば、切削工具等に
使用される高硬度、高靭性の立方晶窒化硼素質焼結体に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cubic boron nitride sintered body having a high hardness and a high toughness which is used for, for example, a cutting tool.
【０００２】[0002]
【従来技術】立方晶窒化硼素（Cubic Boron Nitride 以
下ｃＢＮと略す）はダイヤモンドに次ぐ硬度を有し、し
かもダイヤモンドと異なり鉄系金属との親和性を持たな
いため、特に高硬度焼入れ鋼の研削工具，切削工具に用
いられている。BACKGROUND OF THE INVENTION Cubic Boron Nitride (hereinafter abbreviated as cBN) has hardness second only to diamond, and unlike diamond, has no affinity with ferrous metals, so it is a grinding tool especially for hardened and hardened steel. , Used for cutting tools.
【０００３】このようなｃＢＮを使用した切削工具とし
ては、ｃＢＮをコバルト（Ｃｏ）等の金属で結合したも
のや、炭化チタン（ＴｉＣ）などのセラミックスで結合
したｃＢＮ焼結体が用いられている（特公昭５２−４３
８４６号公報等参照）。As a cutting tool using such cBN, a cBN bonded with a metal such as cobalt (Co) or a cBN sintered body bonded with a ceramic such as titanium carbide (TiC) is used. (Japanese Patent Publication Sho 52-43
846 publication).
【０００４】[0004]
【発明が解決しようとする問題点】上記のような切削工
具のうち、金属を結合材に用いたｃＢＮ焼結体では、耐
熱性を損なわないようにするため金属量をできるだけ少
量に抑え、残部のｃＢＮが直接結合した組織を形成する
ようにしている。しかしながら、このような焼結体で、
例えば高硬度焼入れ鋼を実際に切削してみると、切削中
にｃＢＮ粒子が脱落することによって工具摩耗が大きく
進行するという問題があった。Among the above cutting tools, in the cBN sintered body using a metal as a binder, the amount of the metal is kept as small as possible in order not to impair the heat resistance, and the balance is CBN directly forms a connected tissue. However, with such a sintered body,
For example, when actually cutting a hardened hardened steel, there was a problem that the tool wear greatly progressed due to the cBN particles falling off during cutting.
【０００５】一方、セラミックス中にｃＢＮが分散した
組織のｃＢＮ焼結体では、上記のようなｃＢＮ粒子の脱
落はほとんど見られず耐摩耗性は比較的良好である。特
に、ＴｉＣ、ＴｉＮ、ＴｉＣＮを結合材に用いた場合、
耐摩耗性は最も優れる。しかしながら、セラミック、例
えばＴｉＣをそのまま結合相としたｃＢＮ焼結体では靭
性が劣り、切削中に欠損しやすいという欠点があった。On the other hand, in the cBN sintered body having a structure in which cBN is dispersed in ceramics, the above-mentioned cBN particles are hardly detached and the wear resistance is relatively good. Especially when TiC, TiN, or TiCN is used as the binder,
Wear resistance is the best. However, a ceramic, for example, a cBN sintered body in which TiC is directly used as a binder phase has a drawback that it has poor toughness and is easily broken during cutting.
【０００６】[0006]
【問題点を解決するための手段】本発明者等は、ｃＢＮ
焼結体の耐摩耗性を損なわずに靭性を向上させるべく鋭
意研究した結果、結合相中のＴｉ化合物とｃＢＮとの反
応により生成したＴｉの硼化物にＴｉ以外の周期律表４
ａ、５ａ、６ａ族金属を焼結の過程で固溶させ、結合相
中に特定の化合物等を含有させることにより、耐摩耗性
および靱性に優れたｃＢＮ焼結体を得ることができるこ
とを見出し、本発明に至った。[Means for Solving the Problems]
As a result of intensive research to improve the toughness of the sintered body without impairing its wear resistance, the borate of Ti formed by the reaction of the Ti compound in the binder phase with cBN was added to the periodic table 4 other than Ti.
It was found that a cBN sintered body excellent in wear resistance and toughness can be obtained by forming a solid solution of a metal of group a, 5a, 6a in the process of sintering and containing a specific compound or the like in the binder phase. The present invention has been reached.
【０００７】即ち、本発明の立方晶窒化硼素質焼結体
は、立方晶窒化硼素を３０〜９５体積％含有するととも
に、残部がＴｉと周期律表第４ａ，５ａ，６ａ族元素
（Ｔｉを除く）を含む硼化物固溶体と、ＡｌＮと、Ｔｉ
の炭化物，窒化物，炭窒化物、Ｔｉと周期律表第４ａ，
５ａ，６ａ族元素（Ｔｉを除く）を含む炭化物固溶体，
窒化物固溶体，炭窒化物固溶体の群から選ばれる少なく
とも一種と、不可避不純物とからなるものである。That is, the cubic boron nitride sintered body of the present invention contains 30 to 95% by volume of cubic boron nitride, and the balance is Ti and elements of the periodic table 4a, 5a, and 6a (Ti). (Excluding) boride solid solution containing AlN, Ti
Carbides, Nitride, Carbonitride, Ti and Periodic Table 4a,
Solid solution of carbide containing 5a, 6a group elements (excluding Ti),
At least one selected from the group consisting of a nitride solid solution and a carbonitride solid solution, and an unavoidable impurity.
【０００８】また、立方晶窒化硼素を３０〜９５体積％
含有するとともに、残部がＴｉと周期律表第４ａ，５
ａ，６ａ族元素（Ｔｉを除く）を含む硼化物固溶体と、
ＡｌＮと、Ｔｉの炭化物，窒化物，炭窒化物、Ｔｉと周
期律表第４ａ，５ａ，６ａ族元素（Ｔｉを除く）を含む
炭化物固溶体，窒化物固溶体，炭窒化物固溶体の群から
選ばれる少なくとも一種と、ＴｉＢ2 、周期律表第４
ａ，５ａ，６ａ族元素（Ｔｉを除く）の炭化物，窒化
物，炭窒化物、Ａｌ2 Ｏ3 の群から選ばれる少なくとも
一種と、不可避不純物とからなるものである。Further, cubic boron nitride is added in an amount of 30 to 95% by volume.
In addition to containing Ti, the balance is Ti and Periodic Table 4a, 5
a boride solid solution containing a and 6a group elements (excluding Ti);
AlN and Ti carbide, nitride, carbonitride, selected from the group of carbide solid solution, nitride solid solution, and carbonitride solid solution containing Ti and Group 4a, 5a, and 6a group elements (excluding Ti) of the periodic table. At least one, TiB 2 , 4th Periodic Table
It is composed of at least one selected from the group consisting of carbides, nitrides, carbonitrides, and Al 2 O 3 of a, 5a, and 6a group elements (excluding Ti), and inevitable impurities.
【０００９】本発明の立方晶窒化硼素質焼結体は、立方
晶窒化硼素を３０〜９５体積％含有するとともに、残部
がＴｉと周期律表第４ａ，５ａ，６ａ族元素（Ｔｉを除
く）を含む硼化物固溶体と、ＡｌＮと、Ｔｉの炭化物，
窒化物，炭窒化物のうちの少なくとも一種と、不可避不
純物とからなることが望ましい。The cubic boron nitride sintered body of the present invention contains cubic boron nitride in an amount of 30 to 95% by volume, and the balance is Ti and elements of the Periodic Table 4a, 5a and 6a groups (excluding Ti). A solid solution of boride containing AlN, a carbide of Ti,
It is desirable that at least one of nitride and carbonitride and unavoidable impurities are contained.
【００１０】また、立方晶窒化硼素を３０〜９５体積％
含有するとともに、残部がＴｉと周期律表第４ａ，５
ａ，６ａ族元素（Ｔｉを除く）を含む硼化物固溶体と、
ＡｌＮと、Ｔｉと周期律表第４ａ，５ａ，６ａ族元素
（Ｔｉを除く）を含む炭化物固溶体，窒化物固溶体，炭
窒化物固溶体のうちの少なくとも一種と、不可避不純物
とからなることが望ましい。Further, cubic boron nitride is added in an amount of 30 to 95% by volume.
In addition to containing Ti, the balance is Ti and Periodic Table 4a, 5
a boride solid solution containing a and 6a group elements (excluding Ti);
It is preferable that it is composed of AlN, at least one of a solid carbide solution, a solid nitride solution, and a solid carbonitride solution containing Ti and an element (excluding Ti) of Groups 4a, 5a, and 6a of the Periodic Table, and inevitable impurities.
【００１１】さらに、立方晶窒化硼素を３０〜９５体積
％含有するとともに、残部がＴｉと周期律表第４ａ，５
ａ，６ａ族元素（Ｔｉを除く）を含む硼化物固溶体と、
ＡｌＮと、Ｔｉの炭化物，窒化物，炭窒化物のうちの少
なくとも一種と、Ｔｉと周期律表第４ａ，５ａ，６ａ族
元素（Ｔｉを除く）を含む炭化物固溶体，窒化物固溶
体，炭窒化物固溶体のうちの少なくとも一種と、不可避
不純物とからなることが望ましい。Further, it contains cubic boron nitride in an amount of 30 to 95% by volume, and the balance is Ti and 4a, 5 of the periodic table.
a boride solid solution containing a and 6a group elements (excluding Ti);
AlN, at least one of carbides, nitrides, and carbonitrides of Ti, and a solid solution of carbides, nitrides, and carbonitrides containing Ti and elements of Groups 4a, 5a, and 6a of the periodic table (excluding Ti). It is desirable that at least one of the solid solutions and unavoidable impurities are contained.
【００１２】また、立方晶窒化硼素を３０〜９５体積％
含有するとともに、残部がＴｉとＮｂ，Ｍｏ，Ｔａ，Ｗ
のうち少なくとも一種を含む硼化物固溶体と、ＡｌＮ
と、Ｔｉの炭化物，窒化物，炭窒化物のうちの少なくと
も一種と、不可避不純物とからなることが望ましい。Also, cubic boron nitride is added in an amount of 30 to 95% by volume.
In addition to containing Ti and Nb, Mo, Ta, W
A boride solid solution containing at least one of AlN and
And at least one of Ti carbide, nitride, and carbonitride, and inevitable impurities.
【００１３】さらに、立方晶窒化硼素を３０〜９５体積
％含有するとともに、残部がＴｉとＭｏの硼化物固溶体
と、ＡｌＮと、Ｔｉの炭化物と、ＴｉとＭｏの炭化物固
溶体の少なくとも一種と、不可避不純物とからなること
が望ましい。Further, it contains 30 to 95% by volume of cubic boron nitride, and the balance is at least one of a boride solid solution of Ti and Mo, AlN, a carbide of Ti, and a carbide solid solution of Ti and Mo. It is preferably composed of impurities.
【００１４】立方晶窒化硼素（ｃＢＮ）を３０〜９５体
積％含有させたのは、ｃＢＮが３０体積％より少ない
と、ｃＢＮ本来の特性、即ち、高硬度，高熱伝導性など
の優れた特性を生かすことができないからであり、ｃＢ
Ｎが９５体積％より多いと、切削中にｃＢＮ粒子が脱落
しやすくなり、耐摩耗性が低下するからである。ｃＢＮ
は４０〜６０体積％含有することが望ましい。The cubic boron nitride (cBN) is contained in an amount of 30 to 95% by volume. When cBN is less than 30% by volume, the original characteristics of cBN, that is, excellent characteristics such as high hardness and high thermal conductivity are exhibited. Because you can't make use of it, cB
This is because when the N content is more than 95% by volume, the cBN particles are likely to fall off during cutting and wear resistance is reduced. cBN
It is desirable to contain 40 to 60% by volume.
【００１５】Ｔｉと周期律表第４ａ，５ａ，６ａ族元素
（Ｔｉを除く）を含有する硼化物固溶体を含有させたの
は、このような硼化物固溶体により結合相が強化され、
耐摩耗性、靭性が向上するからである。周期律表第４
ａ，５ａ，６ａ族元素としては、Ｖ，Ｃｒ，Ｚｒ，Ｎ
ｂ，Ｍｏ，Ｈｆ，Ｔａ，Ｗがある。Ｔｉの硼化物に固溶
する元素としては、Ｎｂ、Ｍｏ，Ｔａ、Ｗが望ましく、
特にＭｏが望ましい。このような相互固溶体は焼結体中
０．１〜８０体積％、特には１〜１０体積％含有するこ
とが望ましい。The inclusion of a boride solid solution containing Ti and elements of groups 4a, 5a and 6a (excluding Ti) of the Periodic Table is because such a boride solid solution strengthens the binder phase,
This is because wear resistance and toughness are improved. Periodic table No. 4
Examples of a, 5a, and 6a group elements include V, Cr, Zr, and N.
b, Mo, Hf, Ta, W. Nb, Mo, Ta, and W are desirable as elements that form a solid solution in the boride of Ti,
Mo is particularly desirable. Such a mutual solid solution is preferably contained in the sintered body in an amount of 0.1 to 80% by volume, particularly 1 to 10% by volume.
【００１６】残部に、ＡｌＮを存在させたのは、結合相
を強化させ、耐摩耗性、靱性を向上させるからである。
ＡｌＮは、焼結体中５〜１０体積％含有することが望ま
しい。AlN was present in the balance because it strengthens the binder phase and improves wear resistance and toughness.
AlN is preferably contained in the sintered body in an amount of 5 to 10% by volume.
【００１７】また、Ｔｉの炭化物，窒化物，炭窒化
物、Ｔｉと周期律表第４ａ，５ａ，６ａ族元素（Ｔｉ
を除く）を含む炭化物固溶体，窒化物固溶体，炭窒化物
固溶体、ＴｉＢ2 、周期律表第４ａ，５ａ，６ａ族
元素（Ｔｉを除く）の炭化物，窒化物，炭窒化物、Ａ
ｌ2 Ｏ3 は、いずれもｃＢＮ粒子を強固に保持する作用
を有し、これら自身が耐熱性に優れる性質を有してい
る。Further, Ti carbides, nitrides, carbonitrides, Ti and elements of Groups 4a, 5a and 6a of the periodic table (Ti
Carbide solid solution containing the excluding), carbide nitride solid solution carbonitride solid solution, TiB 2, Periodic Table 4a, 5a, 6a group element (excluding Ti), nitrides, carbonitrides, A
Each of l 2 O 3 has a function of firmly holding the cBN particles, and each of them has a property of excellent heat resistance.
【００１８】ここで、残部にＴｉの炭化物、窒化物、炭
窒化物を含む場合には、耐摩耗性の点から焼結体中５〜
７０体積％含有することが望ましく、特にＴｉＣを選択
した場合には耐摩耗性が良好でＴｉＮを選択した場合に
は高温での耐反応性、耐酸化性を向上できる。また、Ｔ
ｉＣＮの場合、これらの両方の特性を有する。When the balance contains Ti carbides, nitrides, and carbonitrides, the sintered body contains 5 to 5 from the viewpoint of wear resistance.
It is desirable to contain 70% by volume. Particularly, when TiC is selected, the wear resistance is good, and when TiN is selected, the reaction resistance at high temperature and the oxidation resistance can be improved. Also, T
iCN has both of these properties.
【００１９】ＴｉＢ2 を含む場合、焼結体中１〜１０体
積％含有することが望ましい。When TiB 2 is contained, it is preferably contained in the sintered body in an amount of 1 to 10% by volume.
【００２０】またＴｉと周期律表第４ａ，５ａ，６ａ族
元素（Ｔｉを除く）を含む炭化物固溶体，窒化物固溶
体，炭窒化物固溶体を含む場合には、焼結体中５〜７０
体積％含有することが望ましい。これらの固溶体では、
特にＴｉとＷ，Ｍｏ，Ｔａ，Ｎｂとの炭化物固溶体が望
ましい。When a carbide solid solution, a nitride solid solution, or a carbonitride solid solution containing Ti and a group 4a, 5a, or 6a group element (excluding Ti) of the Periodic Table is contained, the sintered body has a content of 5 to 70.
It is desirable to contain it by volume%. In these solid solutions,
In particular, a carbide solid solution of Ti and W, Mo, Ta, Nb is desirable.
【００２１】Ａｌ2 Ｏ3 を含む場合は１〜３体積％含有
することが望ましい。When Al 2 O 3 is contained, it is preferably contained in an amount of 1 to 3% by volume.
【００２２】周期律表第４ａ，５ａ，６ａ族元素（Ｔｉ
を除く）の炭化物，窒化物，炭窒化物を含む場合には、
２〜２０体積％含有することが望ましく、周期律表第４
ａ，５ａ，６ａ族元素の炭化物，窒化物，炭窒化物とし
ては、特に、ＨｆやＷの炭化物が望ましい。Periodic table elements 4a, 5a, 6a (Ti
(Excluding), carbides, nitrides, carbonitrides,
It is desirable to contain 2 to 20% by volume.
Carbides, nitrides, and carbonitrides of the elements a, 5a, and 6a are particularly preferably Hf and W carbides.
【００２３】さらに、上記の構成に対してＣｏ，Ｎｉな
どの結合金属を１０体積％以下含有してもよい。Further, in addition to the above structure, a binding metal such as Co or Ni may be contained in an amount of 10 vol% or less.
【００２４】本願発明の立方晶窒化硼素質焼結体の具体
的な製造方法は、例えば、まず、原料粉末として、ｃＢ
Ｎ粉末と、ＴｉＣ粉末、ＴｉＮ粉末、ＴｉＣＮ粉末と、
Ａｌ粉末と、Ｖ，Ｃｒ，Ｚｒ，Ｎｂ，Ｍｏ，Ｈｆ，Ｔ
ａ，Ｗの金属もしくは炭化物のうち少なくとも一種の粉
末を特定の組成に秤量し、例えば超硬合金製のボールミ
ルで混合する。その後、必要があれば所定形状に成形す
る。成形にはプレス成形、射出成形、鋳込み成形、押し
出し成形等、周知の成形手段を用いることができる。A concrete method for producing the cubic boron nitride sintered body of the present invention is as follows.
N powder, TiC powder, TiN powder, TiCN powder,
Al powder, V, Cr, Zr, Nb, Mo, Hf, T
At least one kind of powder of a or W metal or carbide is weighed to have a specific composition and mixed with, for example, a ball mill made of cemented carbide. Then, if necessary, it is formed into a predetermined shape. Known molding means such as press molding, injection molding, cast molding, extrusion molding can be used for molding.
【００２５】次に上記成形体を、例えば、特公昭３９−
８９４８号公報に開示されるように高温高圧で焼結す
る。即ち、圧力４ＧＰａ以上、温度１３００℃以上で１
５〜６０分間保持し、本発明の立方晶窒化硼素質焼結体
を得る。圧力は４〜６ＧＰａが好ましく、温度は１３０
０〜１８００℃が好ましい。Next, the above-mentioned molded body is treated, for example, in Japanese Examined Patent Publication No.
Sinter at high temperature and high pressure as disclosed in Japanese Patent No. 8948. That is, at a pressure of 4 GPa or more and a temperature of 1300 ° C. or more, 1
Hold for 5 to 60 minutes to obtain the cubic boron nitride sintered body of the present invention. The pressure is preferably 4 to 6 GPa, and the temperature is 130.
0-1800 degreeC is preferable.
【００２６】[0026]
【作用】本発明の立方晶窒化硼素質焼結体では、結合相
のＴｉの硼化物相に周期律表第４ａ，５ａ，６ａ族元素
（Ｔｉを除く）のうち少なくとも一種が固溶した硼化物
固溶体とＡｌＮと、その他に、Ｔｉの炭化物，窒化物，
炭窒化物、ＴｉＢ2 、ＡｌＮおよびＡｌ2 Ｏ3 、Ｔｉと
周期律表第４ａ，５ａ，６ａ族元素（Ｔｉを除く）を含
む炭化物固溶体，窒化物固溶体，炭窒化物固溶体等の特
定の化合物等を含有することにより、結合相が強化さ
れ、焼結体の耐摩耗性と靭性が向上する。また結合相中
にＮｉ，Ｃｏ等の金属が微量存在することにより、焼結
体の靱性がさらに向上する。In the cubic boron nitride sintered body of the present invention, a boron in which at least one of the elements of groups 4a, 5a and 6a (excluding Ti) of the periodic table is dissolved in the boride phase of Ti as the binder phase. Solid solution and AlN, as well as Ti carbide, nitride,
Carbonitrides, TiB 2, AlN and Al 2 O 3, Ti and Periodic Table 4a, 5a, carbide solid solution containing 6a group element (excluding Ti), nitride solid solution, certain compounds, such as carbonitride solid solution By containing the above, the binder phase is strengthened, and the wear resistance and toughness of the sintered body are improved. In addition, the presence of trace amounts of metals such as Ni and Co in the binder phase further improves the toughness of the sintered body.
【００２７】[0027]
【実施例】原料粉末として、ｃＢＮ粉末と、ＴｉＣ粉
末、ＴｉＮ粉末、ＴｉＣＮ粉末と、Ａｌ粉末と、Ｚｒ，
Ｍｏ，Ｈｆ，Ｗの金属もしくは炭化物のうち少なくとも
一種の粉末を準備し、焼結体組成が表１，２に示す組成
となるように秤量し、この粉体を超硬合金製のボールミ
ルで６時間混合した。EXAMPLES As raw material powders, cBN powder, TiC powder, TiN powder, TiCN powder, Al powder, Zr,
At least one powder of Mo, Hf, and W metals or carbides is prepared, weighed so that the composition of the sintered body is as shown in Tables 1 and 2, and the powder is mixed with a ball mill made of cemented carbide. Mixed for hours.
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【表２】 [Table 2]
【００３０】次に、混合した粉体を圧力１ｔｏｎ／ｃｍ
2 で加圧成形し、この成形体を、超高温高圧発生装置を
用いて、表１，２に示す圧力、温度で所定時間保持し、
焼成し、本発明の立方晶窒化硼素質焼結体を得た。Next, the mixed powder is pressed at a pressure of 1 ton / cm.
2 , pressure-molded, using an ultra-high temperature and high pressure generator, hold the pressure and temperature shown in Tables 1 and 2 for a predetermined time,
It was fired to obtain a cubic boron nitride sintered body of the present invention.
【００３１】そして、立方晶窒化硼素質焼結体を取り出
して研削後、鏡面加工し、ＳＥＭ（走査型電子顕微鏡）
で組織を観察した。その結果、本発明品はいずれもポア
のない緻密な組織を有していることが確かめられた。Then, the cubic boron nitride sintered body was taken out, ground, and then mirror-finished, and SEM (scanning electron microscope)
The tissue was observed with. As a result, it was confirmed that all the products of the present invention had a dense structure without pores.
【００３２】次に、得られた焼結体に対し、荷重１ｋｇ
ｆのマイクロビッカース硬度及びビッカース硬度用ダイ
ヤモンド圧子を用いた荷重２０ｋｇｆの圧痕法による破
壊靭性を測定した。Next, a load of 1 kg was applied to the obtained sintered body.
The fracture toughness was measured by the indentation method under a load of 20 kgf using a micro Vickers hardness of f and a diamond indenter for Vickers hardness.
【００３３】さらに、これらの焼結体を用いて工具を作
製し、下記に示す条件で、連続切削試験と断続切削試験
を行った。これらの結果を表１，２に示す。Further, a tool was produced using these sintered bodies, and a continuous cutting test and an interrupted cutting test were conducted under the following conditions. The results are shown in Tables 1 and 2.
【００３４】 （連続切削試験） 被削材 ＳＫＤ１１（Ｈ Ｃ６０）、円筒材 切削速度 １００ｍ／ｍｉｎ 切り込み ０．５ｍｍ 送り ０．１ｍｍ／ｒｅｖ 切削時間 ２０ｍｉｎ （断続切削試験） 被削材 ＳＫＤ１１（Ｈ Ｃ６０）、５ｍｍ幅溝４本
入り円筒材 切削速度 １００ｍ／ｍｉｎ 切り込み ０．５ｍｍ 送り ０．１ｍｍ／ｒｅｖ 切削時間 ５ｍｉｎ これらの表１，２より、本発明の焼結体では硬度Ｈｖが
２３００ｋｇ／ｍｍ2以上、破壊靱性Ｋ1cが７ＭＰａ・
ｍ1/2 以上と高い。また切削試験でも摩耗量が０．１５
ｍｍ以下と少なく、耐欠損性に優れていることが判る。(Continuous Cutting Test) Work Material SKD11 (HC60), Cylindrical Material Cutting Speed 100 m / min Cutting 0.5 mm Feed 0.1 mm / rev Cutting Time 20 min (Intermittent Cutting Test) Work Material SKD11 (H C60) Cylindrical material with four 5 mm width grooves Cutting speed 100 m / min Cutting 0.5 mm Feed 0.1 mm / rev Cutting time 5 min From these Tables 1 and 2, hardness Hv of the sintered body of the present invention is 2300 kg / mm 2 or more. , Fracture toughness K 1c is 7 MPa ・
High as m 1/2 or more. Also, the wear amount was 0.15 in the cutting test.
It can be seen that it is as small as mm or less and has excellent fracture resistance.
【００３５】[0035]
【発明の効果】以上詳述した通り、本発明によれば、結
合相にＴｉと周期律表第４ａ，５ａ，６ａ族元素（Ｔｉ
を除く）を含む硼化物固溶体と、ＡｌＮと、その他にＴ
ｉの炭化物，窒化物，炭窒化物、ＴｉＢ2 、Ａｌ2 Ｏ3
等の特定の化合物を含有させることにより、結合相が強
化され、焼結体の耐摩耗性と靭性が向上した立方晶窒化
硼素質焼結体が得られる。As described in detail above, according to the present invention, Ti is contained in the binder phase and elements of the periodic table group 4a, 5a and 6a (Ti).
Solid solution containing Al, and other than T
i Carbide, nitride, carbonitride, TiB 2 , Al 2 O 3
By incorporating a specific compound such as, for example, a cubic boron nitride sintered body in which the binder phase is strengthened and the wear resistance and toughness of the sintered body are improved can be obtained.
Claims (2)
るとともに、残部がＴｉと周期律表第４ａ，５ａ，６ａ
族元素（Ｔｉを除く）を含む硼化物固溶体と、ＡｌＮ
と、Ｔｉの炭化物，窒化物，炭窒化物、Ｔｉと周期律表
第４ａ，５ａ，６ａ族元素（Ｔｉを除く）を含む炭化物
固溶体，窒化物固溶体，炭窒化物固溶体の群から選ばれ
る少なくとも一種と、不可避不純物とからなることを特
徴とする立方晶窒化硼素質焼結体。1. A cubic boron nitride is contained in an amount of 30 to 95% by volume, and the balance is Ti and 4a, 5a, 6a of the periodic table.
Boride solid solution containing group elements (excluding Ti), and AlN
And at least one selected from the group consisting of a carbide, a nitride, a carbonitride of Ti, a solid solution of a carbide containing Ti and a group 4a, 5a, 6a group element (excluding Ti) of the periodic table, a solid solution of a nitride, and a solid solution of a carbonitride. A cubic boron nitride sintered body comprising one kind and inevitable impurities.
るとともに、残部がＴｉと周期律表第４ａ，５ａ，６ａ
族元素（Ｔｉを除く）を含む硼化物固溶体と、ＡｌＮ
と、Ｔｉの炭化物，窒化物，炭窒化物、Ｔｉと周期律表
第４ａ，５ａ，６ａ族元素（Ｔｉを除く）を含む炭化物
固溶体，窒化物固溶体，炭窒化物固溶体の群から選ばれ
る少なくとも一種と、ＴｉＢ2 、周期律表第４ａ，５
ａ，６ａ族元素（Ｔｉを除く）の炭化物，窒化物，炭窒
化物、Ａｌ2 Ｏ3 の群から選ばれる少なくとも一種と、
不可避不純物とからなることを特徴とする立方晶窒化硼
素質焼結体。2. A cubic boron nitride is contained in an amount of 30 to 95% by volume, and the balance is Ti and 4a, 5a, 6a of the periodic table.
Boride solid solution containing group elements (excluding Ti), and AlN
And at least one selected from the group consisting of a carbide, a nitride, a carbonitride of Ti, a solid solution of a carbide containing Ti and a group 4a, 5a, 6a group element (excluding Ti) of the periodic table, a solid solution of a nitride, and a solid solution of a carbonitride. One, TiB 2 , Periodic Table 4a, 5
at least one selected from the group consisting of carbides, nitrides, carbonitrides, and Al 2 O 3 of a and 6a group elements (excluding Ti);
A cubic boron nitride sintered body characterized by comprising unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6234866A JPH0891936A (en) | 1994-09-29 | 1994-09-29 | Sintered material of boron nitride of cubic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6234866A JPH0891936A (en) | 1994-09-29 | 1994-09-29 | Sintered material of boron nitride of cubic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0891936A true JPH0891936A (en) | 1996-04-09 |
Family
ID=16977574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6234866A Pending JPH0891936A (en) | 1994-09-29 | 1994-09-29 | Sintered material of boron nitride of cubic system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0891936A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002060833A1 (en) * | 2001-01-30 | 2002-08-08 | Showa Denko K.K. | Cubic boron nitride sintered body and cutting tool |
| WO2007039955A1 (en) * | 2005-10-04 | 2007-04-12 | Sumitomo Electric Hardmetal Corp. | cBN SINTERED BODY FOR HIGH-QUALITY SURFACE ASPECT MACHINING AND CUTTING TOOL OF cBN SINTERED BODY |
| JP2007169107A (en) * | 2005-12-22 | 2007-07-05 | Tungaloy Corp | Cubic bn ultra-high pressure sintered compact and its producing method |
| JP2019156692A (en) * | 2018-03-15 | 2019-09-19 | 株式会社タンガロイ | Cubic crystal boron nitride sintered body, and tool having cubic crystal boron nitride sintered body |
-
1994
- 1994-09-29 JP JP6234866A patent/JPH0891936A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002060833A1 (en) * | 2001-01-30 | 2002-08-08 | Showa Denko K.K. | Cubic boron nitride sintered body and cutting tool |
| WO2007039955A1 (en) * | 2005-10-04 | 2007-04-12 | Sumitomo Electric Hardmetal Corp. | cBN SINTERED BODY FOR HIGH-QUALITY SURFACE ASPECT MACHINING AND CUTTING TOOL OF cBN SINTERED BODY |
| US7758976B2 (en) | 2005-10-04 | 2010-07-20 | Sumitomo Electric Hardmetal Corp. | cBN sintered body for high surface integrity machining and cBN sintered body cutting tool |
| JP2007169107A (en) * | 2005-12-22 | 2007-07-05 | Tungaloy Corp | Cubic bn ultra-high pressure sintered compact and its producing method |
| JP2019156692A (en) * | 2018-03-15 | 2019-09-19 | 株式会社タンガロイ | Cubic crystal boron nitride sintered body, and tool having cubic crystal boron nitride sintered body |
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