JPH07308805A - Hard sintered body cutting tool - Google Patents
Hard sintered body cutting toolInfo
- Publication number
- JPH07308805A JPH07308805A JP6229898A JP22989894A JPH07308805A JP H07308805 A JPH07308805 A JP H07308805A JP 6229898 A JP6229898 A JP 6229898A JP 22989894 A JP22989894 A JP 22989894A JP H07308805 A JPH07308805 A JP H07308805A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- cemented carbide
- cutting tool
- hard
- holder
- 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
- 238000005520 cutting process Methods 0.000 title claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 45
- 229910052582 BN Inorganic materials 0.000 claims abstract description 25
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 23
- 239000010432 diamond Substances 0.000 claims abstract description 23
- 239000010409 thin film Substances 0.000 claims abstract description 20
- 229910052709 silver Inorganic materials 0.000 claims abstract description 11
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 229910052737 gold Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000005219 brazing Methods 0.000 description 27
- 239000002131 composite material Substances 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000010949 copper Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 239000010953 base metal Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 101150033765 BAG1 gene Proteins 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Ceramic Products (AREA)
Abstract
(57)【要約】
【目的】 新規な硬質焼結体切削加工具を提供する。
【構成】 ダイヤモンドおよび／または高圧相型窒硼素
を２０容量％以上含有する焼結体部に超硬合金母材が直
接にまたは中間接合層を介して接合されており、前記焼
結体部の表面が、厚さ０．１μｍ以上２０μｍ以下の F
e , Ni , Co , Au, Pt , Ag , Cu のうちの１種以上か
らなるろう付け可能な物質の薄膜で被覆されており、該
焼結体部および前記超硬合金母材のホルダと接する部分
はすべて該ホルダにろう付けされてなることを特徴とす
る硬質焼結体切削加工具。
【効果】 ダイヤモンド焼結体や高圧相型窒化硼素焼結
体の部分にもろう付けを可能とした工具用硬質焼結体を
使用し、しかも従来品より安価で長寿命な切削加工具で
ある。
(57) [Abstract] [Purpose] To provide a novel hard sintered body cutting tool. [Structure] A cemented carbide base material is bonded directly or through an intermediate bonding layer to a sintered body portion containing 20% by volume or more of diamond and / or high-pressure phase type boron nitride. The surface is F with a thickness of 0.1 μm or more and 20 μm or less
It is coated with a thin film of a brazable substance consisting of one or more of e, Ni, Co, Au, Pt, Ag, and Cu, and contacts the sintered body part and the holder of the cemented carbide base material. A hard sinter cutting tool characterized in that all parts are brazed to the holder. [Effect] It is a cutting tool that uses a hard sintered body for tools that can be brazed to the diamond sintered body and the high-pressure phase boron nitride sintered body, and is cheaper and has a longer life than conventional products. .
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ダイヤモンド焼結体ま
たは高圧相型窒化硼素を含有する焼結体と超硬合金母材
が共にホルダに強固に接合されてなる切削加工具、特に
切削工具、掘削工具等に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool in which a diamond sintered body or a sintered body containing a high-pressure phase boron nitride and a cemented carbide base material are firmly joined to a holder, and particularly a cutting tool. , Excavation tools, etc.
【０００２】[0002]
【従来の技術】微細なダイヤモンド粒子を鉄族金属等の
結合材を用いて超高圧高温下で焼結して得られるダイヤ
モンド焼結体は、切削工具、伸線ダイス、ドリルビツト
耐摩工具の刃先材料として、従来の超硬合金に比べ格段
に優れた耐摩耗性を有している。また、微細な高圧相型
窒化硼素を種々の結合材を用いて焼結した材料は、高硬
度の鉄族金属や鋳鉄の切削に対し優れた性能を示す。図
７の(a) ，(b) および(c) に示すようにこれらの焼結体
１は、超硬合金の母材２上に直接または中間接合層を介
して、接合して用いられることが多い。超硬合金２は、
焼結体１の工具ホルダへのろう付けを可能にするため、
あるいは焼結ダイヤモンド等の補強のために用いられて
いる。2. Description of the Related Art A diamond sintered body obtained by sintering fine diamond particles using a binder such as an iron group metal at high pressure and high temperature is a cutting edge material for cutting tools, wire drawing dies, drill bits and wear resistant tools. As compared with conventional cemented carbide, it has significantly better wear resistance. Further, a material obtained by sintering fine high-pressure phase type boron nitride using various binders shows excellent performance for cutting a high hardness iron group metal or cast iron. As shown in (a), (b) and (c) of FIG. 7, these sintered bodies 1 should be used by being bonded directly to the cemented carbide base material 2 or through an intermediate bonding layer. There are many. Cemented Carbide 2
To enable brazing of the sintered body 1 to the tool holder,
Alternatively, it is used for reinforcing sintered diamond and the like.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、図８の
(a) および(b) に示すように、これらの焼結体ではダイ
ヤモンド焼結体や高圧相型窒化硼素焼結体１の部分がろ
う材４に濡れにくく、ホルダ３とこれら焼結体部分１と
の間には間隙５が生ずるという問題点があった。したが
って、図８の(a) および(b) に矢印で示す超硬合金母材
２との接合面に平行であるような応力が働くと、超硬合
金母材２による補強の効果がなくなり、焼結体１中に亀
裂が発生したり、エツジ部が欠損するという問題を生じ
た。したがって、従来の焼結体では主として超硬合金母
材との接合面に垂直な方向の応力が付加される用途のみ
にしか使用することができなかった。また、これらの硬
質焼結体の寸法が小さい場合には、超硬合金母材でのみ
ろう付けされているため、ろう付け強度が低くなり、使
用中ろう付けが外れてしまうという問題点もあった。However, in FIG.
As shown in (a) and (b), in these sintered bodies, the diamond sintered body and the high-pressure phase boron nitride sintered body 1 are hard to be wetted by the brazing material 4, and the holder 3 and these sintered body portions are not easily wetted. There is a problem in that a gap 5 is formed between 1 and 1. Therefore, when a stress that is parallel to the joint surface with the cemented carbide base material 2 shown by the arrows in (a) and (b) of FIG. 8 acts, the reinforcing effect by the cemented carbide base material 2 disappears, There was a problem that cracks were generated in the sintered body 1 and the edge portion was missing. Therefore, the conventional sintered body can be mainly used only for the purpose of applying the stress in the direction perpendicular to the joint surface with the cemented carbide base material. Further, when the dimensions of these hard sintered bodies are small, there is a problem that the brazing strength becomes low and the brazing comes off during use because the brazing is performed only on the cemented carbide base material. It was
【０００４】ところでこれらの硬質焼結体は、ダイヤモ
ンドや高圧相型窒化硼素が安定な超高圧高温下で製造さ
れるため、これを刃先として用いた切削加工用チツプは
高価なものになる。切削加工を行う場合、硬質焼結体は
刃先になる部分にのみ存在すれば良いが、これらの硬質
焼結体を使用するのは、高速で切削したり高硬度の被削
材の場合であるため、高強度の保持力が必要となる。前
記したように超硬合金母材でのみろう付けされるため、
該超硬合金母材の面積が小さいとろう付け強度が低いの
で、図７の(a) ，(b) および(c) に示すような硬質焼結
体１と超硬合金母材２からなる部材のサイズを必要以上
に大きくせねばならず、この点からも従来のダイヤモン
ドまたは高圧相型窒化硼素焼結体を使用した工具は高価
なものであった。By the way, since these hard sintered bodies are produced under stable ultrahigh pressure and high temperature in which diamond and high-pressure phase boron nitride are stable, a chip for cutting using this as a cutting edge becomes expensive. When performing cutting, the hard sintered body need only be present in the part that becomes the cutting edge, but these hard sintered bodies are used for high-speed cutting or high hardness work materials. Therefore, a high strength holding force is required. As described above, since it is brazed only with the cemented carbide base material,
Since the brazing strength is low when the area of the cemented carbide base material is small, it consists of a hard sintered body 1 and a cemented carbide base material 2 as shown in (a), (b) and (c) of FIG. The size of the member has to be increased more than necessary, and from this point as well, the tool using the conventional diamond or the high-pressure phase boron nitride sintered body is expensive.
【０００５】それゆえに、本発明の目的は、上記のダイ
ヤモンド焼結体や高圧相型窒化硼素焼結体の部分にもろ
う付けを可能とした工具用硬質焼結体を使用し、しかも
従来品より安価で長寿命な切削加工具を提供することに
ある。Therefore, an object of the present invention is to use a hard sinter for tools which can be brazed to the above-mentioned diamond sinter and the high pressure phase boron nitride sinter, and further, the conventional product. It is to provide a cutting tool that is cheaper and has a long life.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
の手段として、本発明はダイヤモンドおよび／または高
圧相型窒硼素を２０容量％以上含有する焼結体部に超硬
合金母材が直接にまたは中間接合層を介して接合されて
おり、前記焼結体部の表面が、厚さ０．１μｍ以上２０
μｍ以下の Fe , Ni , Co , Au , Pt , Ag , Cu のうち
の１種以上からなるろう付け可能な物質の薄膜で被覆さ
れており、該焼結体部および前記超硬合金母材のホルダ
と接する部分はすべて該ホルダにろう付けされてなるこ
とを特徴とする硬質焼結体切削加工具を提供する。本発
明の特に好ましい実施態様としては、前記ホルダが超硬
合金からなることを特徴とする上記硬質焼結体切削加工
具が挙げられる。また本発明の特に好ましい他の実施態
様としては、前記焼結体部がホルダに対し垂直にろう付
けされてなることを特徴とする上記硬質焼結体切削加工
具が挙げられる。As a means for solving the above problems, the present invention is directed to the step of directly applying a cemented carbide base material to a sintered body portion containing 20% by volume or more of diamond and / or high pressure phase boron nitride. Or the surface of the sintered body portion has a thickness of 0.1 μm or more.
It is coated with a thin film of a brazable substance consisting of one or more of Fe, Ni, Co, Au, Pt, Ag, and Cu of less than μm, and the sintered body portion and the cemented carbide base material are Provided is a hard sintered body cutting tool characterized in that all the portions in contact with the holder are brazed to the holder. A particularly preferable embodiment of the present invention is the above-mentioned hard sintered body cutting tool, wherein the holder is made of cemented carbide. Another particularly preferable embodiment of the present invention is the hard sintered body cutting tool characterized in that the sintered body portion is brazed vertically to a holder.
【０００７】[0007]
【作用】本発明者等は、ダイヤモンド焼結体および／ま
たは高圧相型窒化硼素焼結体にもろう付け可能で、かつ
ろう付け強度の優れたものを開発すべく鋭意研究を重ね
た結果、ダイヤモンド焼結体および／または高圧相型窒
化硼素焼結体に超硬合金母材を直接または中間結合層を
介して接合した硬質焼結体に、厚さ０．１μｍ以上２０
μｍ以下の Fe , Ni , Co , Au , Pt , Ag , Cu のうち
の１種以上の薄膜で、少なくともろう付けの必要な硬質
焼結体の表面を被覆することにより、被覆した薄膜にろ
う材が濡れて、ホルダと硬質焼結体とが接合可能となる
ことを見い出した。The present inventors have conducted extensive studies to develop a diamond sintered body and / or a high-pressure phase boron nitride sintered body which can be brazed and has excellent brazing strength. A hard sintered body obtained by joining a cemented carbide base material directly or through an intermediate bonding layer to a diamond sintered body and / or a high-pressure phase type boron nitride sintered body, and having a thickness of 0.1 μm or more 20
A brazing material is applied to the coated thin film by coating at least the surface of a hard sintered body that needs brazing with one or more thin films of Fe, Ni, Co, Au, Pt, Ag, and Cu of less than μm. It was found that the holder became wet and the hard sintered body could be joined.
【０００８】このことにより、焼結体部にもろう付け可
能となるため、接合面積が増加するとともに、上述のよ
うに超硬合金母材との接合面に平行であるような応力が
付加された場合にでも、ホルダが補強の役割を果たし、
硬質焼結体の亀裂の発生やエツジの欠損が有効に防止さ
れることを見い出した。As a result, since it becomes possible to braze the sintered body as well, the joint area is increased and, as described above, stress that is parallel to the joint surface with the cemented carbide base material is added. The holder plays a reinforcing role even when
It has been found that cracking and edge loss of the hard sintered body are effectively prevented.
【０００９】さらにダイヤモンドおよび／または高圧相
型窒化硼素を２０容量％以上含有する焼結体部に超硬合
金母材が直接にまたは中間接合層を介して接合されてお
り、前記焼結体部の表面が、厚さ０．１μｍ以上２０μ
ｍ以下、好ましくは１μｍ以上２０μｍ以下の Fe , Ni
, Co , Au , Pt , Ag , Cu のうちの１種以上からなる
ろう付け可能な物質の薄膜で被覆されており、該焼結体
部および前記超硬合金母材のホルダと接する部分はすべ
て該ホルダにろう付けされてなる切削加工具は、高いろ
う付け強度を得られるので、刃先にのみ該硬質焼結体が
存在するような従来品より小型の焼結体を用いるもので
あっても、ろう付け部よりの破損や硬質焼結体の破壊が
生じないことを見い出した。Further, the cemented carbide base material is bonded directly or via an intermediate bonding layer to a sintered body portion containing 20% by volume or more of diamond and / or high-pressure phase boron nitride. The surface is 0.1μm or thicker than 20μ
Fe or Ni of m or less, preferably 1 μm or more and 20 μm or less
, Co, Au, Pt, Ag, Cu, which is covered with a thin film of a brazable substance made of one or more of them, and the portion in contact with the sintered body portion and the holder of the cemented carbide base material is all Since the cutting tool brazed to the holder can obtain high brazing strength, even if a sintered body smaller than a conventional product in which the hard sintered body exists only at the cutting edge is used, It was found that no damage from the brazed part or destruction of the hard sintered body occurred.
【００１０】本発明に使用するダイヤモンド焼結体は、
20容量％以上のダイヤモンドを含有するものである。特
にダイヤモンド含有量が８０容量％以上で、残部が周期
律表IVａ、ＶａおよびVIａ族の元素からなる群より選ば
れた１種もしくは２種以上の金属の炭化物および／また
は鉄族金属よりなる結合材である焼結ダイヤモンドが、
特に優れた耐摩耗性を示すため好ましい。The diamond sintered body used in the present invention is
It contains 20% by volume or more of diamond. In particular, a bond having a diamond content of 80% by volume or more and the balance being a carbide of one or more metals selected from the group consisting of elements of groups IVa, Va and VIa of the periodic table and / or a metal of the iron group Sintered diamond, which is the material,
It is particularly preferable because it exhibits excellent wear resistance.
【００１１】また、本発明に使用する高圧相型窒化硼素
焼結体は、高圧相型窒化硼素を２０容量％以上を含有す
るものである。特に高圧相型窒化硼素の含有量が２０容
量％以上９０容量％以下で、残部が周期律表IVａ、Ｖａ
およびVIａ族の元素からなる群より選ばれた１種もしく
は２種以上の金属の窒化物、炭化物、炭窒化物、硼化物
の混合物または固溶体よりなる結合材、あるいはこれら
の結合材に Al および／または Si を結合材全体に対し
て１容量％以上含有する高圧相型窒化硼素焼結体は、高
硬度の鉄族金属の切削において優れた耐摩耗性と靱性を
示すため好ましい。The high-pressure phase type boron nitride sintered body used in the present invention contains 20% by volume or more of high-pressure phase type boron nitride. In particular, the content of the high-pressure phase type boron nitride is 20% by volume or more and 90% by volume or less, and the balance is the periodic table IVa, Va.
And a binder consisting of a mixture or a solid solution of a nitride, a carbide, a carbonitride, a boride mixture of one or more metals selected from the group consisting of the elements of group VIa and Al and / or Alternatively, a high-pressure phase type boron nitride sintered body containing Si in an amount of 1% by volume or more based on the entire binder is preferable because it exhibits excellent wear resistance and toughness in cutting a high hardness iron group metal.
【００１２】本発明において、硬質焼結体に付着させろ
う付けを可能にする薄膜の膜厚は、０．１〜２０μｍの
範囲とする。膜厚が０．１μｍ未満であると、硬質焼結
体の表面を有効に被覆することが困難であり、その結果
ろう材が均一に硬質焼結体表面に付着しない。また膜厚
が 2 0μｍを越えると、被覆工程に長時間を要し被覆層
形成のコストが高くなってしまう。すなわち膜厚の上限
2 0μm は技術的な理由であく、経済的な理由により限
定されるものである。In the present invention, the thickness of the thin film which is adhered to the hard sintered body and enables brazing is set in the range of 0.1 to 20 μm. When the film thickness is less than 0.1 μm, it is difficult to effectively coat the surface of the hard sintered body, and as a result, the brazing material does not uniformly adhere to the hard sintered body surface. On the other hand, if the film thickness exceeds 20 μm, the coating process takes a long time and the cost for forming the coating layer increases. That is, the upper limit of the film thickness
20 μm is limited for technical and economic reasons.
【００１３】本発明の薄膜としては、ろう材との濡れ性
が良く、かつ硬質焼結体との接合強度の高いものが好ま
しく、特に好ましくは Fe , Ni , Co , Au , Pt , Ag ,
Cuのうちの１種以上である。本発明の Fe , Ni , Co ,
Au , Pt , Ag , Cu の薄膜が硬質焼結体上に強固に接
合する理由は以下のごとくに考えられる。まず薄膜とし
て用いる上記金属は、硬質焼結体中の結合材である周期
律表IVａ、ＶａおよびVIａ族の元素からなる金属の炭化
物、窒化物、炭窒化物との濡れ性が良いこと、および上
記金属はダイヤモンド焼結体中の炭素もしくは高圧相型
窒化硼素焼結体中の硼素、窒素と反応すること、による
と考えられる。さらにこれらの金属は銀ろうや銅ろうと
の濡れ性が良く、これらの金属を硬質焼結体に被覆する
ことにより、ホルダへの強固なろう付けが可能となる。The thin film of the present invention is preferably one having good wettability with the brazing material and high bonding strength with the hard sintered body, and particularly preferably Fe, Ni, Co, Au, Pt, Ag,
One or more of Cu. Fe, Ni, Co, of the present invention
The reason why the Au, Pt, Ag, and Cu thin films are firmly bonded on the hard sintered body is considered as follows. First, the metal used as a thin film has good wettability with carbides, nitrides, and carbonitrides of metals composed of elements of groups IVa, Va, and VIa of the Periodic Table, which are binders in the hard sintered body, and It is considered that the metal reacts with carbon in the diamond sintered body or boron and nitrogen in the high-pressure phase boron nitride sintered body. Furthermore, these metals have good wettability with silver solder and copper solder, and by coating these metals on a hard sintered body, firm brazing to the holder becomes possible.
【００１４】本発明における薄膜としては、特にNi , A
u , Pt , Ag の薄膜が優れている。これらの材料は銀ろ
うとの濡れ性が特に良好であると共に、高温条件下大気
中でも安定であるからである。As the thin film in the present invention, especially Ni, A
The thin films of u, Pt, and Ag are excellent. This is because these materials have particularly good wettability with silver solder and are stable in the atmosphere under high temperature conditions.
【００１５】ところで本発明において用いる優れた性能
を有する硬質焼結体は、７５０℃より高温になると、結
合材とダイヤモンドあるいは高圧相型窒化硼素との熱膨
張差による亀裂発生や、ダイヤモンドあるいは高圧相型
窒化硼素の低圧相型への変態（ダイヤモンドの場合には
グラフアイト化、高圧相型窒化硼素の場合には hex−BN
化）が生じ劣化する。したがって、硬質焼結体の温度が
７５０℃以下の条件下Fe , Ni , Co , Au , Pt , Ag ,
Cu の薄膜を強固に結合させる必要があり、これは以下
の実施例に具体的に開示されている。By the way, the hard sinter having excellent performance used in the present invention, when the temperature is higher than 750 ° C., cracks are generated due to the difference in thermal expansion between the binder and the diamond or the high pressure phase type boron nitride, or the diamond or the high pressure phase. -Type boron nitride transformation to low-pressure phase type (graphite conversion for diamond, hex-BN for high-pressure phase boron nitride)
) Occurs and deteriorates. Therefore, under the condition that the temperature of the hard sintered body is 750 ° C. or lower, Fe, Ni, Co, Au, Pt, Ag,
A tight bond of the Cu thin film is required, which is specifically disclosed in the examples below.
【００１６】以上説明した本発明の硬質焼結体を用いた
切削加工用チツプについて以下に述べる。本発明の切削
加工具においては、該硬質焼結体の焼結体部の少なくと
もろう付けの必要な表面について、該薄膜を被覆し、該
被覆焼結体部と超硬合金母材のホルダと接する部分はす
べてろう付けする、すなわち超硬合金母材部はそのま
ま、また硬質焼結体部は該薄膜を介して、ホルダにろう
付けされているので、その性能が向上する。The chip for cutting using the hard sintered body of the present invention described above will be described below. In the cutting tool of the present invention, at least the surface of the sintered body portion of the hard sintered body that is required to be brazed is coated with the thin film, and the coated sintered body portion and a holder of a cemented carbide base material are provided. All the contacting portions are brazed, that is, the cemented carbide base material portion is as it is and the hard sintered body portion is brazed to the holder through the thin film, so that the performance is improved.
【００１７】本発明におけるホルダとしては超硬合金製
のものが性能向上の点で特に好ましい。これは、超硬合
金と硬質焼結体の熱膨張係数が近く、ろう付けによる残
留応力が少いこと、超硬合金は強度が高いため硬質焼結
体の補強に有効であることが考えられる。本発明に用い
るろう材としては特に限定されず例えば銀ろう、銅ろう
等が用いられる。As the holder in the present invention, a holder made of cemented carbide is particularly preferable in terms of performance improvement. It is thought that this is because the cemented carbide and the hard sintered body have close thermal expansion coefficients and little residual stress due to brazing, and the cemented carbide has high strength and is effective in reinforcing the hard sintered body. . The brazing material used in the present invention is not particularly limited, and for example, silver brazing material, copper brazing material or the like is used.
【００１８】なお焼結体部の被覆は少なくともろう付け
に必要な表面について形成されておればよいのである
が、焼結体の表面にすべて被覆しておき、ろう付けの後
何らかの手段でろう付け面でない部分に残った被覆を除
去してもよいし、場合によればろう付け後も残しておい
てもよい。図１、図２、図３および図４は本発明の切削
加工具の種々の実施態様を示す斜視図であって、１′は
硬質焼結体部、２は超硬合金母材、３はホルダ、４は薄
膜を示す。また図５は本発明に用いる硬質焼結体１と超
硬合金母材２からなる部材の斜視図である。The coating of the sintered body portion should be formed at least on the surface necessary for brazing. However, the surface of the sintered body should be entirely covered, and after brazing, it should be brazed by some means. The coating that remains on the non-planar portion may be removed, or optionally left after brazing. 1, 2, 3 and 4 are perspective views showing various embodiments of the cutting tool of the present invention, in which 1'is a hard sintered body portion, 2 is a cemented carbide base material, and 3 is Holders 4 represent thin films. FIG. 5 is a perspective view of a member composed of the hard sintered body 1 and the cemented carbide base material 2 used in the present invention.
【００１９】[0019]
【実施例】以下、本発明の実施例について説明する。 〔実施例１〕平均粒度７μｍの立方晶型窒化硼素を７５
容量％含有し、残部が TiN，TiC および Al を容積で
５：３：２の割合で含有してなる立方晶型窒化硼素焼結
体大部が、５０容量％の立方晶型窒化硼素とTi−Alから
なる結合材の中間層( 50μｍ厚）を介して、超硬合金母
材に接合されてなる複合焼結体を作製した。該複合焼結
体を図５に示した形状（１×1.5 ×４mm）に切断した
後、表１に示す薄膜を表１に示す種々の方法により該複
合焼結体の硬質焼結体部に被覆した。EXAMPLES Examples of the present invention will be described below. [Example 1] 75 cubic cubic boron nitride particles having an average particle size of 7 μm
A cubic boron nitride sintered body containing 50% by volume of cubic boron nitride and Ti with the balance containing TiN, TiC and Al in a volume ratio of 5: 3: 2. A composite sintered body was produced which was joined to the cemented carbide base material via the intermediate layer (50 μm thick) of the binder made of —Al. After cutting the composite sintered body into the shape (1 × 1.5 × 4 mm) shown in FIG. 5, the thin film shown in Table 1 was formed into a hard sintered body portion of the composite sintered body by various methods shown in Table 1. Coated.
【００２０】[0020]
【表１】 [Table 1]
【００２１】これらの被覆した複合焼結体を、図１に示
す如く超硬合金製の台金３に銀ろう（ JIS BAg−１）４
を用いてろう付けし、刃先ノーズ部が0.8 Ｒになるよう
に加工して切削加工具（本発明品）を作製した。また、
比較のため薄膜を被覆していない複合焼結体についても
同様にして切削加工具（比較品）を作製した。以上で得
られた切削加工具のチップろう付け状態を観察したとこ
ろ、Ａ〜Ｇのものは硬質焼結体が銀ろうを介して超硬合
金の台金に接合されていたが、Ｈは一部分ろうすきがあ
った。また比較品は硬質焼結体と台金は接着しておらず
隙間があった。次にこれ等の切削加工具を用いて、切削
速度１２０ｍ／分、切込み 0.3mm、送り 0.1mm／回転
で、直径１００mmのインコネルを切削したところ、本発
明品であるＡ〜Ｇは１０分間切削しても問題は生じなか
ったが、Ｈは２分間切削した時点で、また比較品は５分
間切削した時点で刃先が欠損した。As shown in FIG. 1, a cemented carbide base metal 3 and a silver solder (JIS BAg-1) 4 were coated on these coated composite sintered bodies.
Was brazed and processed so that the nose portion of the cutting edge was 0.8 R to produce a cutting tool (product of the present invention). Also,
For comparison, a cutting tool (comparative product) was prepared in the same manner for the composite sintered body not coated with the thin film. When the chip brazing state of the cutting tool obtained above was observed, the hard sintered bodies of A to G were joined to the base metal of the cemented carbide through the silver brazing, but H was partially There was a crush. Further, in the comparative product, the hard sintered body and the base metal were not adhered, and there was a gap. Next, using these cutting tools, Inconel having a diameter of 100 mm was cut at a cutting speed of 120 m / min, a depth of cut of 0.3 mm, and a feed of 0.1 mm / revolution. Although no problems occurred, the cutting edge of H was cut at the time of cutting for 2 minutes, and the cutting edge of the comparative product at the time of cutting for 5 minutes.
【００２２】〔実施例２〕平均粒度３μｍの立方晶型窒
化硼素を６０容量％含有し、残部が Ti および Al を容
積で９：１の割合で含有してなる焼結体が、超硬合金母
材に直接結合した複合焼結体を作製した。該複合焼結体
を図５に示した形状（２×１×２mm）に切断し、表２に
示す種々の薄膜４を該複合焼結体に形成させた後、図６
に示すように超硬合金基材３′に JIS BAg−７相当の銀
ろう材を使用して大気中でろう付けし、図６の４の部分
に圧力を加え剪断強度を測定した。この結果も併せて表
２に示す。なお、硬質焼結体と超硬合金の厚さはそれぞ
れ１mmと一定にした。Example 2 A sintered body containing 60% by volume of cubic boron nitride having an average grain size of 3 μm and the balance containing Ti and Al in a volume ratio of 9: 1 was a cemented carbide. A composite sintered body directly bonded to the base material was produced. After cutting the composite sintered body into the shape (2 × 1 × 2 mm) shown in FIG. 5 and forming various thin films 4 shown in Table 2 on the composite sintered body, FIG.
As shown in (3), the cemented carbide base material 3'was brazed in the atmosphere using a silver brazing material equivalent to JIS BAg-7, and pressure was applied to the portion 4 in FIG. 6 to measure the shear strength. The results are also shown in Table 2. The thickness of each of the hard sintered body and the cemented carbide was set to 1 mm.
【００２３】[0023]
【表２】 [Table 2]
【００２４】上記剪断強度測定に用いたものと同じ各複
合焼結体を用いて図４に示す形状の硬質焼結体切削加工
具を作製した。ダイス鋼からなる１００mmφの円柱に９
０°毎にＶ字状の溝を設けた被削材料を、切削速度１０
０ｍ／分、切込み０．３mm、送り 0.1mm／回転で切削し
たところ、本発明品であるＩ，Ｊ，Ｌ〜ＱおよびＲのも
のは１０分間切削しても問題は生じなかった。Ｋのもの
は、１分間切削した時点で刃先が欠損した。A hard sinter cutting tool having the shape shown in FIG. 4 was produced using the same composite sinter as that used for the shear strength measurement. 9 in a 100mmφ cylinder made of die steel
A work material having V-shaped grooves at every 0 ° is cut at a cutting speed of 10
When cutting was performed at 0 m / min, a depth of cut of 0.3 mm, and a feed of 0.1 mm / revolution, the products of the present invention, I, J, L to Q, and R, did not cause any problem even after 10 minutes of cutting. In the case of K, the cutting edge was broken at the time of cutting for 1 minute.
【００２５】[0025]
【発明の効果】以上説明したように、本発明の切削加工
具の硬質焼結体部はろう付け可能であってホルダとの間
に隙間を生じることなく、ホルダにろう付けされてい
る。したがって、従来の硬質焼結体よりもろう付けの面
積を大幅に増加させることができるので、ろう付け強度
を飛躍的に向上させることが可能になる。よって、本発
明の切削加工具は、切削工具、ドリルビツト等の刃先材
等に有効に利用され得るものである。また上記の特定の
硬質焼結体を用いた本発明の切削加工具はホルダと接す
る焼結体部と超硬合金の表面はすべて隙間なくホルダに
ろう付けされているので、硬質焼結体を充分補強するこ
とが可能であり、従来品では不可能であった超硬合金母
材接合面に平行な応力が働らく用途にも使用でき、高い
衝撃力が負荷される断続切削用途にも用いて、切削時の
欠損やホルダからのはずれ等がなく、従来品より長寿命
であり、またろう付け面積の増加により、従来この型の
チツプでは強度的に困難であった複合焼結体部の小さい
ものでも実用しうるので、より安価で高品質である。As described above, the hard sintered body portion of the cutting tool of the present invention can be brazed and is brazed to the holder without forming a gap with the holder. Therefore, the brazing area can be significantly increased as compared with the conventional hard sintered body, so that the brazing strength can be dramatically improved. Therefore, the cutting tool of the present invention can be effectively used for cutting tools, cutting edge materials such as drill bits, and the like. Further, the cutting tool of the present invention using the above specific hard sintered body, since the sintered body portion in contact with the holder and the surface of the cemented carbide are all brazed to the holder without a gap, the hard sintered body is It can be sufficiently reinforced and can be used for applications where stress parallel to the cemented carbide base metal joining surface works, which was impossible with conventional products, and also for intermittent cutting applications where high impact force is applied. In addition, it has a longer life than conventional products, with no damage during cutting or disengagement from the holder, and due to the increase in brazing area, the strength of the composite sintered body that was difficult with this type of chip It is cheaper and of high quality because it can be used in small things.
【図１】は本発明の切削加工具の一実施態様を示す斜視
図である。FIG. 1 is a perspective view showing an embodiment of a cutting tool of the present invention.
【図２】は本発明の切削加工具の他の実施態様を示す斜
視図である。FIG. 2 is a perspective view showing another embodiment of the cutting tool of the present invention.
【図３】は本発明の切削加工具の他の実施態様を示す斜
視図である。FIG. 3 is a perspective view showing another embodiment of the cutting tool of the present invention.
【図４】は本発明の切削加工具の他の実施態様を示す斜
視図である。FIG. 4 is a perspective view showing another embodiment of the cutting tool of the present invention.
【図５】は本発明に用いる硬質焼結体部１と超硬合金母
材２からなる部材の斜視図である。FIG. 5 is a perspective view of a member composed of a hard sintered body portion 1 and a cemented carbide base material 2 used in the present invention.
【図６】は本発明の実施例２で剪断強度を測定した部材
の斜視図である。FIG. 6 is a perspective view of a member whose shear strength is measured in Example 2 of the present invention.
【図７】は従来の焼結体と超硬合金母材からなる複合焼
結体の斜視図である。FIG. 7 is a perspective view of a composite sintered body including a conventional sintered body and a cemented carbide base material.
【図８】は従来品を説明する断面図および斜視図であっ
て、図中矢印は応力の負荷方向をあらわす。8A and 8B are a cross-sectional view and a perspective view illustrating a conventional product, in which an arrow indicates a stress load direction.
１ 硬質焼結体、 １′ 硬質焼結体部、 ２ 超
硬合金母材、３ ホルダ、 ３′ 超硬合金基
材、 ４ 薄膜。DESCRIPTION OF SYMBOLS 1 hard sintered body, 1'hard sintered body part, 2 cemented carbide base material, 3 holder, 3 'cemented carbide base material, 4 thin film.
Claims (3)
硼素を２０容量％以上含有する焼結体部に超硬合金母材
が直接にまたは中間接合層を介して接合されており、前
記焼結体部の表面が、厚さ０．１μｍ以上２０μｍ以下
の Fe , Ni ,Co , Au , Pt , Ag , Cu のうちの１種以
上からなるろう付け可能な物質の薄膜で被覆されてお
り、該焼結体部および前記超硬合金母材のホルダと接す
る部分はすべて該ホルダにろう付けされてなることを特
徴とする硬質焼結体切削加工具。1. A cemented carbide base material is bonded directly or through an intermediate bonding layer to a sintered body portion containing 20% by volume or more of diamond and / or high-pressure phase boron nitride, and the sintered body The surface of the part is covered with a thin film of a brazable substance made of one or more of Fe, Ni, Co, Au, Pt, Ag, and Cu having a thickness of 0.1 μm or more and 20 μm or less, A hard sintered body cutting tool characterized in that the bonded portion and the portion of the cemented carbide base material in contact with the holder are all brazed to the holder.
徴とする請求項１記載の硬質焼結体切削加工具。2. The hard sintered body cutting tool according to claim 1, wherein the holder is made of cemented carbide.
付けされてなることを特徴とする請求項１又は請求項２
に記載の硬質焼結体切削加工具。3. The sintered body portion is brazed perpendicularly to the holder, and the sintered body portion is brazed vertically.
A hard-sintered body cutting tool according to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6229898A JPH07308805A (en) | 1986-02-14 | 1994-09-26 | Hard sintered body cutting tool |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3138686 | 1986-02-14 | ||
| JP61-31386 | 1986-02-14 | ||
| JP6229898A JPH07308805A (en) | 1986-02-14 | 1994-09-26 | Hard sintered body cutting tool |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14141886A Division JPH0730363B2 (en) | 1986-02-14 | 1986-06-19 | Hard sintered body cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07308805A true JPH07308805A (en) | 1995-11-28 |
Family
ID=26369832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6229898A Pending JPH07308805A (en) | 1986-02-14 | 1994-09-26 | Hard sintered body cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07308805A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006526508A (en) * | 2003-06-03 | 2006-11-24 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Indexable cutting insert and method of manufacturing the cutting insert |
| JP2009023010A (en) * | 2007-07-17 | 2009-02-05 | Fuji Heavy Ind Ltd | Gear tooth surface finishing tool |
| CN110449678A (en) * | 2019-07-23 | 2019-11-15 | 河南机电职业学院 | A kind of method for welding improving PDC and steel matrix bonding strength |
| CN111054928A (en) * | 2019-12-25 | 2020-04-24 | 西华大学 | A kind of preparation method of cemented carbide/steel weldment |
| WO2023223941A1 (en) * | 2022-05-18 | 2023-11-23 | 株式会社オリジン | Tip nose component, cutting tool tip, and manufacturing method for cutting tool tip |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141702A (en) * | 1984-08-06 | 1986-02-28 | Sumitomo Electric Ind Ltd | Composite material containing sintered hard body |
-
1994
- 1994-09-26 JP JP6229898A patent/JPH07308805A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141702A (en) * | 1984-08-06 | 1986-02-28 | Sumitomo Electric Ind Ltd | Composite material containing sintered hard body |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006526508A (en) * | 2003-06-03 | 2006-11-24 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Indexable cutting insert and method of manufacturing the cutting insert |
| JP4782672B2 (en) * | 2003-06-03 | 2011-09-28 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Indexable cutting insert and method of manufacturing the cutting insert |
| JP2009023010A (en) * | 2007-07-17 | 2009-02-05 | Fuji Heavy Ind Ltd | Gear tooth surface finishing tool |
| CN110449678A (en) * | 2019-07-23 | 2019-11-15 | 河南机电职业学院 | A kind of method for welding improving PDC and steel matrix bonding strength |
| CN110449678B (en) * | 2019-07-23 | 2021-05-18 | 河南机电职业学院 | Brazing method for improving connection strength of PDC and steel matrix |
| CN111054928A (en) * | 2019-12-25 | 2020-04-24 | 西华大学 | A kind of preparation method of cemented carbide/steel weldment |
| CN111054928B (en) * | 2019-12-25 | 2022-03-08 | 西华大学 | Preparation method of hard alloy/steel welding part |
| WO2023223941A1 (en) * | 2022-05-18 | 2023-11-23 | 株式会社オリジン | Tip nose component, cutting tool tip, and manufacturing method for cutting tool tip |
| JP2023170201A (en) * | 2022-05-18 | 2023-12-01 | 株式会社オリジン | Tip parts for tips, tips for cutting tools, and methods for producing tips for cutting tools |
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