JPH04304905A - Cutting tool made of titanium carbonitride group ceramics excellent in wear resistance - Google Patents
Cutting tool made of titanium carbonitride group ceramics excellent in wear resistanceInfo
- Publication number
- JPH04304905A JPH04304905A JP3093422A JP9342291A JPH04304905A JP H04304905 A JPH04304905 A JP H04304905A JP 3093422 A JP3093422 A JP 3093422A JP 9342291 A JP9342291 A JP 9342291A JP H04304905 A JPH04304905 A JP H04304905A
- Authority
- JP
- Japan
- Prior art keywords
- cutting tool
- wear resistance
- ticn
- titanium carbonitride
- tool made
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 15
- 239000010936 titanium Substances 0.000 title claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 7
- 229910052719 titanium Inorganic materials 0.000 title claims description 7
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 14
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 abstract description 7
- 229910033181 TiB2 Inorganic materials 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 229910018404 Al2 O3 Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 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】この発明は、高強度および高硬度
を有する炭窒化チタン（以下、ＴｉＣＮで示す）基セラ
ミックスで構成され、実用に際してすぐれた耐摩耗性を
示す切削工具に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool made of titanium carbonitride (hereinafter referred to as TiCN)-based ceramic having high strength and hardness and exhibiting excellent wear resistance in practical use.
【０００２】0002
【従来の技術】従来、例えば特開昭６３−１６６７６１
号公報に記載される通り、酸化ジルコニウム（以下、Ｚ
ｒＯ２ で示す）、並びにＹ，Ｍｇ，Ｃａ，および希土
類元素の酸化物のうちの１種以上を０．１〜３モル％の
割合で固溶させて安定化したＺｒＯ２ のうちのいずれ
か一方、あるいは両方：５〜２５％、
酸化アルミニウム（以下、Ａｌ２ Ｏ３ で示す）：５
〜３０％、
炭窒化チタン（以下ＴｉＣＮで示す）：残り、からなる
配合組成（以下重量％、以下％は重量％を示す）の焼結
体であるＴｉＣＮ基セラミックスで構成された切削工具
が、ダクタイル鋳鉄や鋼などの切削に用いられているこ
とは良く知られている。[Prior Art] Conventionally, for example, Japanese Patent Application Laid-Open No. 63-166761
As described in the publication, zirconium oxide (hereinafter referred to as Z
rO2), and ZrO2 stabilized by solid solution of one or more of Y, Mg, Ca, and oxides of rare earth elements at a ratio of 0.1 to 3 mol%, Or both: 5 to 25%, aluminum oxide (hereinafter referred to as Al2O3): 5
A cutting tool made of TiCN-based ceramics, which is a sintered body, has a composition of ~30%, titanium carbonitride (hereinafter referred to as TiCN), and the remainder (hereinafter referred to as % by weight). It is well known that it is used for cutting ductile cast iron and steel.
【０００３】0003
【発明が解決しようとする課題】一方、近年の切削機械
の高性能化およびＦＡ化はめざましく、これに伴ない、
これに用いられている切削工具には使用寿命のより一層
の延命化が強く望まれているが、上記の従来ＴｉＣＮ基
セラミックス製切削工具においては、耐摩耗性が十分で
ないために、これらの要求に満足に対応することができ
ないのが現状である。[Problem to be solved by the invention] On the other hand, in recent years, the performance of cutting machines and the use of FA have been remarkable, and along with this,
There is a strong desire for the cutting tools used in these applications to have a much longer service life, but the conventional TiCN-based ceramic cutting tools mentioned above do not have sufficient wear resistance, so these demands cannot be met. The current situation is that it is not possible to respond satisfactorily.
【０００４】0004
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、上記の従来ＴｉＣＮ基セラミッ
クス製切削工具に着目し、これの耐摩耗性を改善すべく
研究を行なった結果、上記の従来ＴｉＣＮ基セラミック
ス製切削工具を構成するＴｉＣＮ基セラミックスにほう
化チタン（以下、ＴｉＢ２ で示す）を含有させると、
ＴｉＢ２ 成分は上記セラミックスの強度と硬さの向上
に寄与し、したがってこれを切削工具として実用に供し
た場合にはすぐれた耐摩耗性を示すようになり、使用寿
命の一段の延命化が可能になるという研究結果を得たの
である。[Means for solving the problem] Therefore, the present inventors
From the above-mentioned viewpoint, we focused on the conventional TiCN-based ceramic cutting tool described above and conducted research to improve its wear resistance. When titanium boride (hereinafter referred to as TiB2) is added to
The TiB2 component contributes to improving the strength and hardness of the above-mentioned ceramics, and therefore, when used as a cutting tool, it exhibits excellent wear resistance, making it possible to further extend its service life. The research results showed that.
【０００５】この発明は、上記の研究結果にもとづいて
なされたものであって、ＺｒＯ２ および安定化ＺｒＯ
２ のうちのいずれか、または両方：５〜２５％、Ａｌ
２ Ｏ３ ：５〜３０％、
ＴｉＢ２ ：５〜２０％、
ＴｉＣＮ：残り、
からなる配合組成の焼結体、望ましくはホットプレス焼
結体で構成してなるＴｉＣＮ基セラミックス製切削工具
に特徴を有するものである。[0005] This invention was made based on the above research results, and it
Either or both of 2: 5-25%, Al
2 O3: 5 to 30%, TiB2: 5 to 20%, TiCN: the remainder, A sintered body, preferably a hot press sintered body, is characterized by a TiCN-based ceramic cutting tool. It is something.
【０００６】つぎに、この発明の切削工具において、こ
れを構成するＴｉＣＮ基セラミックスの配合組成を上記
の通りに限定した理由を説明する。Next, the reason why the composition of the TiCN-based ceramics constituting the cutting tool of the present invention is limited as described above will be explained.
【０００７】（ａ）ＺｒＯ２ および安定化ＺｒＯ２
これらの成分は、靭性を向上させ、もって耐欠損性を向
上させる作用があるが、その割合が５％未満では前記作
用に所望の向上効果が得られず、一方その割合が２５％
を越えても靭性に低下傾向が現われるようになるばかり
でなく、硬さも低下するようになることから、その割合
を５〜２５％と定めた。(a) ZrO2 and stabilized ZrO2
These components have the effect of improving toughness and thereby improving fracture resistance, but if the proportion is less than 5%, the desired effect of improving the above effect cannot be obtained; on the other hand, if the proportion is less than 25%
Even if it exceeds 5%, not only does the toughness tend to decrease, but the hardness also decreases, so the ratio was set at 5 to 25%.
【０００８】（ｂ）Ａｌ２ Ｏ３
Ａｌ２ Ｏ３ 成分には、焼結時におけるＴｉＣＮの粒
成長を抑制するほか、化学的安定性を向上させる作用が
あるが、その割合が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３０％を越えると硬さが低
下し、耐摩耗性が低下するようになることから、その割
合を５〜３０％と定めた。(b) Al2 O3 The Al2 O3 component has the effect of suppressing the grain growth of TiCN during sintering and improving the chemical stability, but if its proportion is less than 5%, the desired effect may not be achieved. However, if the ratio exceeds 30%, the hardness decreases and the wear resistance decreases, so the ratio was set at 5 to 30%.
【０００９】（ｃ）ＴｉＢ２
ＴｉＢ２ 成分には、組織を微細化し、かつ強度と硬さ
を向上させる作用があるが、その割合が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％
を越えると靭性が低下し、切刃に欠損が発生し易くなる
ことから、その割合を５〜２０％と定めた。(c) TiB2 The TiB2 component has the effect of refining the structure and improving strength and hardness, but if its proportion is less than 5%, the desired effect cannot be obtained; The percentage is 20%
If it exceeds this, the toughness will decrease and the cutting edge will be more likely to be damaged, so the ratio was set at 5 to 20%.
【００１０】0010
【実施例】つぎに、この発明の切削工具を実施例により
具体的に説明する。[Example] Next, the cutting tool of the present invention will be explained in detail with reference to an example.
【００１１】原料粉末として、いずれも０．２〜２μｍ
の範囲内の平均粒径を有するＴｉＣＮ粉末、ＺｒＯ２
粉末、それぞれ表１，２に示される酸化物を固溶した安
定化ＺｒＯ２ 粉末、Ａｌ２ Ｏ３ 粉末、およびＴｉ
Ｂ２ 粉末を用い、これら原料粉末を表１に示される配
合組成に配合し、以下いずれも通常の条件で湿式混合し
、乾燥した後、これを温度：１６００〜１９００℃の範
囲内の所定温度、圧力：３００ｋｇｆ／ｃｍ２ の条件
でホットプレスして、直径：５０ｍｍ×厚さ：７ｍｍの
寸法をもった焼結体とし、この焼結体のロックウェル硬
さ、３点曲げ強度、および破壊靭性値を測定し、さらに
これをＪＩＳ・ＳＮＧＮ１２０４０８の形状をもった切
削チップに加工することにより本発明ＴｉＣＮ基セラミ
ックス製切削工具（以下、本発明切削工具という）１〜
１１、およびＴｉＢ２ を含有しない従来ＴｉＣＮ基セ
ラミックス製切削工具（以下、従来切削工具という）１
〜１１をそれぞれ製造した。[0011] As raw material powder, each has a diameter of 0.2 to 2 μm.
TiCN powder with an average particle size within the range of ZrO2
Stabilized ZrO2 powder, Al2O3 powder, and Ti powder containing the oxides shown in Tables 1 and 2 as a solid solution, respectively.
Using B2 powder, these raw material powders were blended into the composition shown in Table 1, wet mixed under normal conditions, and dried. A sintered body with dimensions of 50 mm diameter x 7 mm thickness was obtained by hot pressing at a pressure of 300 kgf/cm2, and the Rockwell hardness, three-point bending strength, and fracture toughness of this sintered body were measured. The TiCN-based ceramic cutting tool of the present invention (hereinafter referred to as the cutting tool of the present invention) 1-
11, and conventional TiCN-based ceramic cutting tool not containing TiB2 (hereinafter referred to as conventional cutting tool) 1
-11 were produced, respectively.
【００１２】0012
【表１】[Table 1]
【００１３】[0013]
【表２】[Table 2]
【００１４】ついで、この結果得られた各種の切削工具
について、
被削材：ＪＩＳ・ＳＮＧＮ４４０の丸棒、切削速度：４
００ｍ／ｍｉｎ 、
送り：０．３ｍｍ／ｒｅｖ．、
切込み：１．５ｍｍ、
切削時間：１０分、
の条件で鋼の湿式連続切削試験を行ない、切刃の逃げ面
摩耗幅を測定した。これらの測定結果を表１，２にそれ
ぞれ示した。[0014] Next, regarding the various cutting tools obtained as a result, Work material: JIS/SNGN440 round bar, Cutting speed: 4
00m/min, feed: 0.3mm/rev. A wet continuous cutting test was conducted on steel under the following conditions: depth of cut: 1.5 mm, cutting time: 10 minutes, and the flank wear width of the cutting edge was measured. These measurement results are shown in Tables 1 and 2, respectively.
【００１５】[0015]
【発明の効果】表１，２に示される結果から、本発明切
削工具１〜１１は、これを構成するＴｉＣＮ基セラミッ
クスが従来切削工具１〜１１を構成するＴｉＣＮ基セラ
ミックスに比して一段と高い硬さと強度を有するので、
切削に際して、従来切削工具１〜１１に比して著しくす
ぐれた耐摩耗性を示すことが明らかである。[Effects of the Invention] From the results shown in Tables 1 and 2, the cutting tools 1 to 11 of the present invention have a TiCN-based ceramic that constitutes the cutting tools 1 to 11. Because it has hardness and strength,
It is clear that during cutting, the wear resistance is significantly superior to that of conventional cutting tools 1 to 11.
【００１６】上述のように、この発明のＴｉＣＮ基セラ
ミックス製切削工具は、これを構成するＴｉＣＮ基セラ
ミックスによって高硬度と高強度が確保され、したがっ
てこれを実用に供した場合には一段とすぐれた耐摩耗性
を示し、使用寿命のより一層の延命化が可能となること
から、各種切削機械の高性能化およびＦＡ化にも十分に
対応することができるなど工業上有用な特性を有するの
である。As mentioned above, the TiCN-based ceramic cutting tool of the present invention has high hardness and high strength due to the TiCN-based ceramic that constitutes it, and therefore, when it is put into practical use, it will have even better durability. Since it exhibits abrasion resistance and can further extend its service life, it has industrially useful properties such as being able to fully respond to the high performance and factory automation of various cutting machines.
Claims (1)
定化酸化ジルコニウムのうちのいずれか、または両方：
５〜２５％、 酸化アルミニウム：５〜３０％、 ほう化チタン：５〜２０％、 炭窒化チタン：残り、 からなる配合組成の焼結体で構成したことを特徴とする
耐摩耗性にすぐれた炭窒化チタン基セラミックス製切削
工具。1. Either or both of zirconium oxide and stabilized zirconium oxide, in weight percent:
5 to 25%, aluminum oxide: 5 to 30%, titanium boride: 5 to 20%, and titanium carbonitride: the remainder. Titanium carbonitride ceramic cutting tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3093422A JPH04304905A (en) | 1991-03-29 | 1991-03-29 | Cutting tool made of titanium carbonitride group ceramics excellent in wear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3093422A JPH04304905A (en) | 1991-03-29 | 1991-03-29 | Cutting tool made of titanium carbonitride group ceramics excellent in wear resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04304905A true JPH04304905A (en) | 1992-10-28 |
Family
ID=14081866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3093422A Pending JPH04304905A (en) | 1991-03-29 | 1991-03-29 | Cutting tool made of titanium carbonitride group ceramics excellent in wear resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04304905A (en) |
-
1991
- 1991-03-29 JP JP3093422A patent/JPH04304905A/en active Pending
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