JPH08732B2 - Manufacturing method of cubic boron nitride based ultra high pressure sintered body for cutting tool - Google Patents
Manufacturing method of cubic boron nitride based ultra high pressure sintered body for cutting toolInfo
- Publication number
- JPH08732B2 JPH08732B2 JP62007726A JP772687A JPH08732B2 JP H08732 B2 JPH08732 B2 JP H08732B2 JP 62007726 A JP62007726 A JP 62007726A JP 772687 A JP772687 A JP 772687A JP H08732 B2 JPH08732 B2 JP H08732B2
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- powder
- sintered body
- high pressure
- pressure sintered
- cbn
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、耐熱性および靭性にすぐれ、特に焼入鋼
などの高硬度鋼の高速切削に切削工具として使用するの
に適した立方晶窒化硼素（以下、CBNで示す）基超高圧
焼結体の製造法に関するものである。Description: [Industrial field of application] The present invention has a cubic nitriding property which is excellent in heat resistance and toughness and is particularly suitable for use as a cutting tool for high speed cutting of hardened steel such as hardened steel. The present invention relates to a method for producing a boron (hereinafter referred to as CBN) -based ultra-high pressure sintered body.
近年、焼入鋼などの高硬度鋼の研削加工から、より加
工能率を高い切削加工への切り換えが急速に進み、それ
に伴って高い硬度を有するCBN基超高圧焼結体が切削工
具として注目されるようになっており、例えば、周期律
表の4a族、5a族、および6a族金属の炭化物、窒化物、硼
化物、珪化物、Al2O3,MgO,AlN,Si3N4のうちの１種また
は２種以上:20〜80重量％と、CBNおよび不可避不純物：
残り、からなる組成を有するCBN基超高圧焼結体が、焼
入鋼の切削工具として提案されている（特公昭57−3631
号公報参照）。In recent years, there has been a rapid shift from grinding of high hardness steel such as hardened steel to cutting with higher processing efficiency, and along with this, CBN-based ultra-high pressure sintered compacts with high hardness have attracted attention as cutting tools. For example, among 4a group, 5a group, and 6a group metal carbides, nitrides, borides, silicides, Al 2 O 3 , MgO, AlN, Si 3 N 4 of the periodic table One or more of: 20 to 80% by weight, CBN and unavoidable impurities:
A CBN-based ultra-high pressure sintered body having a composition consisting of the rest has been proposed as a cutting tool for hardened steel (Japanese Patent Publication No. Sho 57-3631).
(See the official gazette).
しかしながら、上記の従来CBN基超高圧焼結体のう
ち、Tiの炭化物、窒化物、および硼化物（以下、Ti化合
物という）の１種または２種以上と、CBNおよび不可避
不純物とからなるCBN基超高圧焼結体を切削工具とし
て、例えばHRC:60以上の硬さを有する焼入鋼を施削する
場合には、その切削速度を150m/minを越す速さとする
と、刃先の温度上昇によって被削材が刃先に溶着しやす
くなり、それによって摩擦熱の増大、刃先温度の上昇を
招いて、刃先の摩耗が急激に増大するとともに、上記CB
N基超高圧焼結体の靭性不足に起因して、刃先にチッピ
ングや欠損を起しやすいところから、上記従来のCBN基
超高圧焼結体は、焼入鋼の切削工具とした場合、概ね10
0m/min以下の切削速度でしか使用することができないの
で、１個当りに長時間の加工時間を要し、そのため高い
切削速度を必要とする大型部品の切削には利用すること
ができず、したがって上記の従来CBN基超高圧焼結体で
は、焼入鋼などの高硬度鋼の切削に切削工具として用い
る価値が未だ十分得られていないという問題があった。However, among the above-mentioned conventional CBN-based ultra-high pressure sintered bodies, a CBN group consisting of one or more of Ti carbides, nitrides and borides (hereinafter referred to as Ti compounds), CBN and unavoidable impurities as a cutting tool for ultra high pressure sintered body, for example, H R C: in the case of lathe turning a hardened steel having 60 or more hardness, when the cutting speed and the speed in excess of 150 meters / min, the temperature rise of the cutting edge Due to this, the work material is easily welded to the cutting edge, which increases frictional heat and increases the temperature of the cutting edge, and the wear of the cutting edge sharply increases.
Due to the lack of toughness of the N-based ultra-high pressure sintered body, it is easy to cause chipping or chipping in the cutting edge. Ten
Since it can be used only at a cutting speed of 0 m / min or less, it requires a long machining time per piece, and therefore it cannot be used for cutting large parts that require a high cutting speed. Therefore, the above-mentioned conventional CBN-based ultra-high pressure sintered body has a problem that its value as a cutting tool for cutting hardened steel such as hardened steel has not been sufficiently obtained.
そこで、本発明者等は、上記のような従来CBN基超高
圧焼結体のもつ問題点を解決すべく種々研究を重ねた結
果、 （１） 上記従来CBN基超高圧焼結体を切削工具として
高硬度鋼を高い切削速度で切削すると、切削中、高温に
曝されて溶着を起し、耐摩耗性が著しく低下するのは、
このCBN基超高圧焼結体の製造中に、WC基超硬合金製ま
たはステンレス鋼製などの混合装置、例えばそのボール
やポットが摩滅することによって混合粉末中に混入した
鉄族金属およびＷが焼結時にＢと化合物を形成しやす
く、したがって焼結体中に前記化合物が存在すると、こ
の化合物中のＢは高温で不安定となって動きやすくな
り、このＢが被削材中に拡散すると刃先に被削材が溶着
して、摩擦熱の増大、刃先温度の上昇を招くことに起因
すること、 （２） CBN基超高圧焼結体を製造するための原料粉末
中に鉄族金属が混在していると、焼結時に鉄族金属とＢ
とが反応して部分的に液相を生じ、それによってTi化合
物が粒成長を起して焼結体の靭性を低下させること、 したがって、焼結直前の混合粉末中の鉄族金属および
Ｗの含有量を低減すれば、上記２つの問題が一挙に解決
されて、耐熱性にすぐれ、かつ靭性の向上したCBN基超
高圧焼結体が得られること、 （３） 上記特性の向上したCBN基超高圧焼結体を製造
するに際して、さらに原料粉末として、Alの酸化物粉
末、窒化物粉末、窒酸化物粉末、および硼化物粉末（以
下、それぞれAl2O3粉末、AlN粉末、AlNO粉末、および
（AlBX粉末で示し、これらをまとめてAl化合物粉末とい
う）を用い、これら原料粉末のうちの１種または２種以
上を0.5〜20重量％の割合で配合すると、その焼結性が
改善されて、焼結体の靭性が一層向上すること、 以上（１）〜（３）に示される研究結果を得たのであ
る。Therefore, the present inventors have conducted various studies to solve the problems of the conventional CBN-based ultra-high pressure sintered body as described above, and as a result, (1) The conventional CBN-based ultra-high pressure sintered body is used as a cutting tool. As a result, when high hardness steel is cut at a high cutting speed, it is exposed to high temperature during welding and causes welding, which significantly reduces wear resistance.
During the production of this CBN-based ultra-high pressure sintered body, a mixing device made of WC-based cemented carbide or stainless steel, for example, iron group metal and W mixed in the mixed powder due to abrasion of the balls and pots When sintering, a compound is easily formed with B. Therefore, when the compound is present in the sintered body, B in the compound becomes unstable at high temperature and easily moves, and when the B diffuses into the work material. This is due to the fact that the work material is welded to the cutting edge, causing an increase in friction heat and an increase in the cutting edge temperature. (2) Iron group metal is contained in the raw material powder for producing the CBN-based ultra-high pressure sintered body. If they are mixed, the iron group metal and B are mixed during sintering.
React with and partially generate a liquid phase, whereby the Ti compound causes grain growth and reduces the toughness of the sintered body. Therefore, the iron group metal and W in the mixed powder immediately before sintering are If the content is reduced, the above two problems can be solved at once, and a CBN-based ultra-high pressure sintered body having excellent heat resistance and improved toughness can be obtained. (3) CBN-based material with improved characteristics When producing the ultra-high pressure sintered body, as the raw material powder, further, Al oxide powder, nitride powder, oxynitride powder, and boride powder (hereinafter, respectively Al 2 O 3 powder, AlN powder, AlNO powder, Using (and shown as AlB X powder and collectively referred to as Al compound powder) and blending one or more of these raw material powders in a proportion of 0.5 to 20% by weight improves the sinterability. To further improve the toughness of the sintered body, as described above (1) to ( Than is to obtain research results shown in).
この発明は、上記の研究結果に基づいてなされたもの
で、すぐれた耐熱性と靭性を有し、特に焼入鋼などの高
硬度鋼の高速切削に切削工具として使用するのに適した
CBN基超高圧焼結体の製造法を提供することを目的と
し、原料粉末を、重量％で（以下、％は重量％を示
す）、 Tiの炭化物粉末、窒化物粉末、炭窒化物粉末、および
硼化物粉末（以下、それぞれTiC粉末、TiN粉末、TiCN粉
末、およびTiBX粉末で示し、これらをまとめてTi化合物
粉末という）のうちの１種または２種以上:5〜50％、 Al化合物粉末のうちの１種または２種以上:0.5〜20
％、 CBN粉末：残り、 からなる配合組成に配合し、かつ混合粉末中に混入する
Fe,Ni,Co、およびＷのうちの１種または２種以上からな
る不純物（以下、鉄族金属およびＷからなる不純物とい
う）を除去して、混合粉末中の前記不純物の含有量を0.
5％以下に低減する、切削工具用CBN基超高圧焼結体の製
造法に特徴を有するものである。The present invention was made based on the above research results, has excellent heat resistance and toughness, and is particularly suitable for use as a cutting tool for high-speed cutting of hardened steel such as hardened steel.
For the purpose of providing a method for producing a CBN-based ultra-high pressure sintered body, the raw material powder in% by weight (hereinafter,% means% by weight), Ti carbide powder, nitride powder, carbonitride powder, and boride powder (hereinafter, TiC powder, respectively, TiN powder, indicated at TiCN powder, and TiB X powder, they are collectively referred to as Ti compound powder) one or more of: 5 to 50%, Al compound One or more powders: 0.5 to 20
%, CBN powder: The rest is blended in a blending composition consisting of and mixed in the mixed powder.
Impurities composed of one or more of Fe, Ni, Co, and W (hereinafter referred to as impurities composed of iron group metal and W) are removed, and the content of the impurities in the mixed powder is reduced to 0.
It is characterized by the manufacturing method of CBN-based ultra-high pressure sintered body for cutting tools, which is reduced to 5% or less.
つぎに、この発明方法において配合組成を上記のとお
りに限定した理由を述べる。Next, the reason why the compounding composition is limited as described above in the method of the present invention will be described.
（ａ） Ti化合物粉末 これらの原料粉末には、焼結体に耐溶着性を付与する
作用があるが、その割合が５％未満では所望の耐溶着性
を確保することができず、一方その割合が50％を越える
と、焼結体の靭性が不足して刃先が欠けやすくなること
から、その割合を５〜50％と定めた。(A) Ti compound powder These raw material powders have the function of imparting welding resistance to the sintered body, but if the proportion is less than 5%, the desired welding resistance cannot be secured, while If the ratio exceeds 50%, the toughness of the sintered body is insufficient and the cutting edge is likely to be chipped, so the ratio was set to 5 to 50%.
（ｂ） Al化合物粉末 これらの原料粉末には、焼結体の靭性を向上させる作
用があるが、その割合が0.5％未満では前記作用に所望
の効果が得られず、一方その割合が20％を越えると、高
温となったときの刃先の耐摩耗性が低下するようになる
ことから、その割合を0.5〜20％と定めた。(B) Al compound powder These raw material powders have the effect of improving the toughness of the sintered body, but if the proportion is less than 0.5%, the desired effect is not obtained on the other hand, while the proportion is 20%. If it exceeds, the wear resistance of the cutting edge will decrease when the temperature becomes high, so the ratio was set to 0.5 to 20%.
なお、鉄族金属およびＷからなる不純物は、焼結時に
CBNのＢと化合して部分的に液相を生じ、それによってT
i化合物の粒成長を促して焼結体の靭性を低下させると
ともに、前記不純物成分と化合した状態で焼結体中に含
まれるＢは、切削時に高温に曝されることによって被削
材中に拡散しやすくなり、その結果刃先の耐溶着性を低
下させてそれの摩耗を急激に増大させるので、特に高硬
度鋼の高速切削に切削工具として使用されるCBN基超高
圧焼結体においては、その靭性と、高温における十分な
耐溶着性、したがって耐摩耗性、すなわち耐熱性とを確
保するために、この鉄族金属およびＷからなる不純物が
できるだけ含まれないことが肝要であるが、焼結直前の
混合粉末中の含有量が0.5％以下であれば、上記の不都
合は無視できるようになることから、これらの不純物の
混合粉末中の含有量を0.5％以下と定めた。Impurities composed of iron group metals and W are
It combines with B of CBN to partially form a liquid phase, whereby T
In addition to promoting the grain growth of the i-compound to lower the toughness of the sintered body, B contained in the sintered body in the state of being combined with the above-mentioned impurity component is exposed to a high temperature during cutting, and thus is contained in the work material. It becomes easy to diffuse, as a result of which the welding resistance of the cutting edge is reduced and the wear thereof is sharply increased, so especially in the CBN-based ultra-high pressure sintered body used as a cutting tool for high-speed cutting of high hardness steel, In order to secure its toughness and sufficient welding resistance at high temperature, and thus wear resistance, that is, heat resistance, it is essential that impurities of this iron group metal and W are not included as much as possible. If the content in the mixed powder immediately before is 0.5% or less, the above inconvenience can be ignored. Therefore, the content of these impurities in the mixed powder is set to 0.5% or less.
また、この発明の方法は、通常の超高圧焼結法、すな
わち、まず原料粉末として、CBN粉末、TiC粉末、TiN粉
末、TiCN粉末、TiB2粉末、Al2O3粉末、AlN粉末、AlNO粉
末、およびAlBX粉末を用意し、これら原料粉末のうちか
ら適宜選択したものを所定の配合組成に配合し、混合
し、この混合粉末調製中、その混合工程においてボール
ミルのような混合装置から混入してきた前記不純物を、
例えば、アセトン等の溶剤と混ざり合って、またスラリ
ー状となっている混合粉末中で磁石をゆるやかに回転さ
せ、それによって鉄族金属およびそれらと結合している
Ｗを磁石に吸着させる方法、あるいは混合粉末を乾燥し
た後、それを酸洗して前記不純物を選択的に溶解する方
法などによって除去し、ついで混合粉末の状態あるいは
圧粉体の状態で、必要に応じてWC基超硬合金製プレート
などと一緒に、金属容器に挿入し、これを800〜1200℃
の温度に加熱して真空脱ガスを行って封入し、引続いて
この封入容器を超高圧高温発生装置に装着してから圧力
および温度を上げ、圧力:40〜70Kb、温度:1200〜1600℃
の範囲内の圧力および温度に数分〜数10分保持した後、
冷却し、最終的に圧力を解放することからなる基本的工
程によって実施される。Further, the method of the present invention is a normal ultra-high pressure sintering method, that is, first, as the raw material powder, CBN powder, TiC powder, TiN powder, TiCN powder, TiB 2 powder, Al 2 O 3 powder, AlN powder, AlNO powder. , And AlB X powder are prepared, and one appropriately selected from these raw material powders is blended into a predetermined blending composition and mixed, and during this mixed powder preparation, it is mixed from a mixing device such as a ball mill in the mixing step. The impurities
For example, a method in which a magnet is mixed with a solvent such as acetone, or is slowly rotated in a mixed powder in a slurry state, thereby adsorbing an iron group metal and W bound thereto to the magnet, or After drying the mixed powder, it is pickled to remove the impurities by a method such as selectively dissolving the impurities, and then, in the mixed powder state or the green compact state, if necessary, made of WC-based cemented carbide. Insert it in a metal container together with a plate, etc.
It is heated to the temperature of 1 to perform vacuum degassing and sealed, and then this sealed container is attached to the ultra-high pressure and high temperature generator, and then the pressure and temperature are increased, pressure: 40 to 70 Kb, temperature: 1200 to 1600 ° C.
After holding the pressure and temperature within the range of several minutes to several tens of minutes,
It is carried out by the basic process consisting of cooling and finally releasing the pressure.
さらにこの発明の方法によって製造されたCBN基超高
圧焼結体を切削工具として使用するに当っては、単独
で、あるいはWC基超硬合金やサーメットなどの高剛性焼
結体と複合させた状態で、スローアウェイチップとして
用いても、さらにこれらのチップをWC基超硬合金や焼入
鋼などでつくられたホルダの先端部にろう付けにより取
り付けた状態で用いてもよい。Furthermore, in using the CBN-based ultra-high pressure sintered body produced by the method of the present invention as a cutting tool, it is used alone or in a state of being compounded with a high-rigidity sintered body such as WC-based cemented carbide or cermet. Then, the inserts may be used as throw-away inserts, or these inserts may be attached to the tip of a holder made of WC-based cemented carbide or hardened steel by brazing.
ついで、この発明のCBN基焼結材料を実施例によって
説明する。Next, the CBN-based sintered material of the present invention will be described by way of examples.
原料粉末として、平均粒径:3μを有するCBN粉末、い
ずれも１μの平均粒径を有するTiC粉末、TiN粉末、TiC
0.5Ｎ0.5粉末、およびTiB2粉末、さらに平均粒径:1.5μ
のAl2O3粉末、AlN粉末、およびAlNO粉末、同0.7μのAlB
2粉末を用意し、これら原料粉末を、それぞれ第1,2表に
示される配合組成に配合した後、ボールミルによりアセ
トン中で５時間混合して混合粉末を形成させた。この段
階における混合粉末は、主として混合装置に由来する鉄
族金属とＷからなる不純物を、乾燥重量を基にして第1,
2表に示される通り１〜５％の範囲で含んでいた。As the raw material powder, CBN powder having an average particle size: 3μ, TiC powder, TiN powder, TiC having an average particle size of 1μ
0.5 N 0.5 powder, TiB 2 powder, average particle size: 1.5μ
Al 2 O 3 powder, AlN powder, and AlNO powder, 0.7μ AlB
Two powders were prepared, and these raw material powders were blended to the blending composition shown in Tables 1 and 2, respectively, and then mixed in acetone by a ball mill for 5 hours to form a mixed powder. The mixed powder in this stage contains the impurities mainly composed of the iron group metal and W, which originate in the mixing device, based on the dry weight.
As shown in Table 2, the content was 1 to 5%.
ついで、磁気吸着された不純物を容易に除去できるよ
うに表面をテフロンシート（ただしテフロンは米国デュ
ポン社の商標）で被った円柱状の永久磁石を、アセトン
と混ざってスリーとなっている前記混合粉末中で２時間
ゆるやかに回転させて前記不純物を吸着除去し、それに
よってそれぞれ第１表に示される含有量の前記不純物を
含有した混合粉末を調製した。Then, a cylindrical permanent magnet whose surface is covered with a Teflon sheet (Teflon is a trademark of DuPont, USA) so that the magnetically adsorbed impurities can be easily removed. The mixture was gently rotated for 2 hours in order to adsorb and remove the impurities, thereby preparing mixed powders containing the impurities in the contents shown in Table 1, respectively.
つぎに、このように調製した混合粉末を2ton/cm2の圧
力で直径:13mm×厚さ:1.5mmの寸法をもった円板状圧粉
体に成形した後、これらの圧粉体を、超高圧高温発生装
置の容器内に挿入し、圧力:50Kb、温度:1500℃、保持時
間:5分の条件で超高圧焼結することによって本発明法１
〜14および比較法１〜７を実施し、CBN基超高圧焼結体
をそれぞれ製造し、さらに第２表に示される通り前記 のAl化合物粉末の配合を行なわず、かつ磁石による不純
物の吸着除去行なわかった点を除き、上記と同一の条件
によって従来法１〜７を行ない、CBN基超高圧焼結体を
製造した。なお、比較法１〜７は、いずれも原料粉末の
うちのいずれかの配合割合（第１表中に※印で示す）が
この発明の範囲から外れたものである。Next, the mixed powder thus prepared was molded into a disk-shaped green compact having a diameter of 13 mm and a thickness of 1.5 mm at a pressure of 2 ton / cm 2 , and then these green compacts were formed. The method 1 of the present invention is carried out by inserting into a container of an ultrahigh pressure and high temperature generator and performing ultrahigh pressure sintering under conditions of pressure: 50 Kb, temperature: 1500 ° C., holding time: 5 minutes
14 to 14 and Comparative Methods 1 to 7 to produce CBN-based ultra-high pressure sintered bodies, respectively, and further as shown in Table 2 above. The conventional methods 1 to 7 were performed under the same conditions as above, except that the Al compound powder was not mixed and the impurities were removed by adsorption with a magnet, to produce a CBN-based ultrahigh pressure sintered body. In each of Comparative Methods 1 to 7, the mixing ratio of any one of the raw material powders (indicated by * in Table 1) is out of the range of the present invention.
ついで、この結果得られた各種のCBN基超高圧焼結体
について、靭性を評価する目的で破壊靭性値を測定し、
また高温における耐溶着性並びに耐摩耗性を評価する目
的で、上記各焼結体から切削チップを切出し、WC基超硬
合金製ホルダにろう付けし、研磨仕上げしてTNGA332の
工具形状とした後、 被削材:SCM−418の焼入鋼（硬さ:HRC62）の丸棒（直径:
100mm）、 切削速度:250m/min、 切込み:0.1mm、 送り:0.08mm/rev. の条件で連続切削試験を実施し、切刃の逃げ面摩耗幅が
0.2mmに至るまでの切削時間を測定して、これらの結果
を第３表に示した。Then, for each of the various CBN-based ultra-high pressure sintered bodies obtained as a result, the fracture toughness value was measured for the purpose of evaluating the toughness,
For the purpose of evaluating the welding resistance and wear resistance at high temperatures, cutting chips were cut from each of the above sintered bodies, brazed to a WC-based cemented carbide holder, and then ground to a TNGA332 tool shape. workpiece: hardened steel (hardness: H R C62) of SCM-418 round bar (diameter:
100mm), cutting speed: 250m / min, depth of cut: 0.1mm, feed: 0.08mm / rev.
The cutting time up to 0.2 mm was measured, and these results are shown in Table 3.
第１〜３表に示される結果から、本発明法１〜14で製
造されたCBN基超高圧焼結体は、いずれも高い靭性を有
するとともに、高温においてすぐれた耐溶着性および耐
摩耗性を示し、したがってこれらの特性が特に要求され
る焼入鋼などの高硬度鋼の速度切削においてもすぐれた
切削性能を発揮するのに対して、比較法１〜７に見られ
るように、原料粉末のうちのいずれかの配合割合がこの
発明の範囲から外れると、製造されたCBN基超高圧焼結
体は前記特性のうち少なくともいずれかの特性が低下し
て、切削性能の劣ったものとなり、また従来法１〜７で
製造されたCBN基超高圧焼結体では、混合粉末中の鉄族
金属とＷからなる不純物がこの発明で規定した含有量を
越えて多量に含まれ、かつAl化合物を含有しないため、
その耐溶着性と耐摩耗性が低く、切削性能が著しく劣っ
たものであり、高硬度鋼の高速切削に適した切削工具で
ないことがわかる。From the results shown in Tables 1 to 3, the CBN-based ultra-high pressure sintered bodies produced by the methods 1 to 14 of the present invention all have high toughness, and also have excellent welding resistance and wear resistance at high temperatures. Therefore, while these characteristics show excellent cutting performance even in speed cutting of high hardness steel such as hardened steel which is particularly required, as shown in Comparative methods 1 to 7, When the blending ratio of any of them is out of the range of the present invention, the manufactured CBN-based ultra-high pressure sintered body is deteriorated in at least one of the above characteristics, and has poor cutting performance. In the CBN-based ultrahigh-pressure sintered compacts manufactured by the conventional methods 1 to 7, impurities of the iron group metal and W in the mixed powder are contained in a large amount in excess of the contents specified in the present invention, and the Al compound is contained. Since it does not contain
The welding resistance and wear resistance are low, and the cutting performance is remarkably inferior, which means that the cutting tool is not suitable for high speed cutting of high hardness steel.
上述のように、この発明の方法によれば、高い靭性と
すぐれた耐熱性を備えたCBN基超高圧焼結体を製造する
ことができ、したがってこれを、これらの特性が要求さ
れる焼入鋼などの高硬度鋼の高速切削に切削工具として
用いた場合、きわめてすぐれた切削性能を示すものであ
り、さらに上記のような難削材が大型部品となっても能
率よく切削できるという効果を奏するものである。As described above, according to the method of the present invention, it is possible to produce a CBN-based ultra-high pressure sintered body having high toughness and excellent heat resistance, and therefore, it is necessary to carry out quenching which requires these properties. When used as a cutting tool for high-speed cutting of high hardness steel such as steel, it shows extremely excellent cutting performance. Furthermore, even if the above-mentioned difficult-to-cut materials become large parts, they can be efficiently cut. It plays.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 和男 埼玉県大宮市北袋町１−297 三菱金属株 式会社中央研究所内 (56)参考文献 特開 昭53−77811（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Yamamoto 1-297 Kitabukuro-cho, Omiya-shi, Saitama Inside Central Research Laboratory, Mitsubishi Metals Corporation (56) Reference JP-A-53-77811 (JP, A)
Claims (1)
方法において、原料粉末を、 Tiの炭化物粉末、窒化物粉末、炭窒化物粉末、および硼
化物粉末のうちの１種または２種以上:5〜50重量％、 Alの酸化物粉末、窒化物粉末、窒酸化物粉末、および硼
化物粉末のうちの１種または２種以上:0.5〜20重量％、 立方晶窒化硼素粉末：残り、 からなる配合組成に配合し、かつ混合粉末中に混入する
Fe,Ni,Co、およびＷのうちの１種または２種以上からな
る不純物を除去して、混合粉末中の前記不純物の含有量
を0.5重量％以下とすることを特徴とする切削工具用立
方晶窒化硼素基超高圧焼結体の製造法。1. A method for producing a cubic boron nitride-based ultra-high pressure sintered body, wherein the raw material powder is one or two of Ti carbide powder, nitride powder, carbonitride powder, and boride powder. 1 or more: 5 to 50% by weight, one or more of oxide powder of Al, nitride powder, oxynitride powder, and boride powder: 0.5 to 20% by weight, cubic boron nitride powder: The rest is blended into a blended composition consisting of and mixed into the mixed powder.
A cubic for a cutting tool, characterized in that the impurities consisting of one or more of Fe, Ni, Co and W are removed to make the content of the impurities in the mixed powder 0.5 wt% or less. Method for producing ultra-high pressure sintered boron nitride base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62007726A JPH08732B2 (en) | 1987-01-16 | 1987-01-16 | Manufacturing method of cubic boron nitride based ultra high pressure sintered body for cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62007726A JPH08732B2 (en) | 1987-01-16 | 1987-01-16 | Manufacturing method of cubic boron nitride based ultra high pressure sintered body for cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63176367A JPS63176367A (en) | 1988-07-20 |
| JPH08732B2 true JPH08732B2 (en) | 1996-01-10 |
Family
ID=11673714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62007726A Expired - Fee Related JPH08732B2 (en) | 1987-01-16 | 1987-01-16 | Manufacturing method of cubic boron nitride based ultra high pressure sintered body for cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08732B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8915890B2 (en) | 2009-07-30 | 2014-12-23 | Becton, Dickinson And Company | Medical device assembly |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2782524B2 (en) * | 1989-02-07 | 1998-08-06 | 東芝タンガロイ株式会社 | High density phase boron nitride based reaction sintered body and method for producing the same |
| CN1240641C (en) | 1999-02-12 | 2006-02-08 | 住友电气工业株式会社 | High strength sintered impact having excellent resistance to cratering |
| JP5100927B2 (en) * | 2001-01-30 | 2012-12-19 | 昭和電工株式会社 | Method for producing cubic boron nitride sintered body |
| WO2010119962A1 (en) * | 2009-04-17 | 2010-10-21 | 株式会社タンガロイ | Cubic boron nitride sintered compact and coated cubic boron nitride sintered compact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5377811A (en) * | 1976-12-21 | 1978-07-10 | Sumitomo Electric Ind Ltd | Sintered material for tools of high hardness and its preparation |
-
1987
- 1987-01-16 JP JP62007726A patent/JPH08732B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8915890B2 (en) | 2009-07-30 | 2014-12-23 | Becton, Dickinson And Company | Medical device assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63176367A (en) | 1988-07-20 |
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