JPH07108405A - Surface coated cutting tool - Google Patents
Surface coated cutting toolInfo
- Publication number
- JPH07108405A JPH07108405A JP28003493A JP28003493A JPH07108405A JP H07108405 A JPH07108405 A JP H07108405A JP 28003493 A JP28003493 A JP 28003493A JP 28003493 A JP28003493 A JP 28003493A JP H07108405 A JPH07108405 A JP H07108405A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- cutting tool
- coated cutting
- reaction gas
- aluminum oxide
- 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.)
- Granted
Links
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- Cutting Tools, Boring Holders, And Turrets (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、超硬合金基体または
サーメット基体の表面に化学蒸着法により形成された、
チタンの炭化物、窒化物、炭窒化物、炭酸化物および炭
窒酸化物のうち１種の単層または２種以上の複層（以
下、チタン化合物層と総称する）並びに少なくとも１層
の酸化アルミニウム層からなる複合硬質層を形成してな
る耐摩耗性および耐欠損性に優れた表面被覆切削工具に
関するものである。FIELD OF THE INVENTION The present invention is formed on the surface of a cemented carbide substrate or a cermet substrate by chemical vapor deposition.
Titanium carbide, nitride, carbonitride, carbon oxide and oxycarbonitride, which is a single layer or two or more layers (hereinafter collectively referred to as titanium compound layer) and at least one aluminum oxide layer. The present invention relates to a surface-coated cutting tool having excellent wear resistance and chipping resistance formed by forming a composite hard layer made of
【０００２】[0002]
【従来の技術】従来、超硬合金基体またはサーメット基
体の表面に、チタン化合物層および少なくとも１層の酸
化アルミニウム層からなる複合硬質層を化学蒸着法によ
り被覆してなる表面被覆切削工具は、鋼などの連続切削
や断続切削に用いられていることは良く知られていると
ころである。2. Description of the Related Art Conventionally, a surface-coated cutting tool obtained by coating a surface of a cemented carbide substrate or a cermet substrate with a composite hard layer consisting of a titanium compound layer and at least one aluminum oxide layer by a chemical vapor deposition method is made of steel. It is well known that it is used for continuous cutting and intermittent cutting.
【０００３】前記酸化アルミニウム層は、前記チタン化
合物層よりも高温における耐摩耗性に優れているが、密
着性および靭性に劣るために、超硬合金基体またはサー
メット基体の表面に化学蒸着法により先ずチタン化合物
層を被覆し、このチタン化合物層の上に化学蒸着法によ
り酸化アルミニウム層を被覆し、形成された複合硬質層
の耐摩耗性および靭性を付与して耐欠損性を向上させて
いる。The aluminum oxide layer is superior to the titanium compound layer in wear resistance at high temperatures, but since it is inferior in adhesion and toughness, it is first deposited on the surface of a cemented carbide substrate or a cermet substrate by a chemical vapor deposition method. A titanium compound layer is coated, and an aluminum oxide layer is coated on the titanium compound layer by a chemical vapor deposition method to impart wear resistance and toughness to the formed composite hard layer to improve fracture resistance.
【０００４】前記複合硬質層における酸化アルミニウム
層を化学蒸着法により形成する方法として、二酸化炭
素：１５Ｖｏｌ％以下を含む通常の反応ガスに０．０１
〜１．０Ｖｏｌ％の硫化水素ガスを添加した反応ガスを
用いることにより酸化アルミニウム層の成長速度を向上
させる方法が知られている。この方法によると、酸化ア
ルミニウム層の成長速度が向上するところからその他の
被覆層および基体を高温に長時間さらすことなく組織変
化を防止することができ、したがって、従来の被覆切削
工具よりも優れた性能を有する表面被覆切削工具が得ら
れるといわれている（例えば、特公昭６２−３２３４号
公報参照）。As a method for forming the aluminum oxide layer in the composite hard layer by the chemical vapor deposition method, 0.01 is added to an ordinary reaction gas containing carbon dioxide: 15 Vol% or less.
There is known a method of improving the growth rate of an aluminum oxide layer by using a reaction gas to which hydrogen sulfide gas of up to 1.0 Vol% is added. According to this method, since the growth rate of the aluminum oxide layer is improved, it is possible to prevent the structural change without exposing the other coating layers and the substrate to high temperature for a long time, and therefore, it is superior to the conventional coated cutting tool. It is said that a surface-coated cutting tool having performance can be obtained (see, for example, Japanese Patent Publication No. 62-3234).
【０００５】[0005]
【発明が解決しようとする課題】しかし、近年、切削工
程の省力化および短縮化に対する要求は強く、これに伴
ない、より一段と苛酷な条件下での高送りおよび高切込
みなどの高速連続重切削や断続切削が強いられる傾向に
あるが、前記従来の二酸化炭素：１５Ｖｏｌ％以下を含
む反応ガスに硫化水素ガス：０．０１〜０．３Ｖｏｌ％
を添加した反応ガスを用いて酸化アルミニウム層を含む
複合硬質層が被覆された切削工具は、これら苛酷な条件
下では、被覆層の耐摩耗性および耐欠損性が不十分であ
り、比較的短時間の使用寿命しか示さないのが現状であ
る。However, in recent years, there is a strong demand for labor saving and shortening of the cutting process, and accordingly, high-speed continuous heavy cutting such as high feed and high depth of cut under more severe conditions. However, there is a tendency for forced intermittent cutting, but hydrogen sulfide gas: 0.01 to 0.3 Vol% in the reaction gas containing the conventional carbon dioxide: 15 Vol% or less.
A cutting tool coated with a composite hard layer containing an aluminum oxide layer by using a reaction gas added with is under relatively severe conditions, the wear resistance and fracture resistance of the coating layer are insufficient, and is relatively short. At present, it only shows the service life of time.
【０００６】[0006]
【課題を解決するための手段】そこで本発明者らは、さ
らに一層耐摩耗性および耐欠損性に優れた酸化アルミニ
ウム層を含む複合硬質層が被覆された表面被覆切削工具
を開発すべく研究を行った結果、Ｘ線回折による（１０
４）面のピーク強度をＩ（１０４）、（０３０）面のピ
ーク強度をＩ（０３０）、（０１２）面のピーク強度を
Ｉ（０１２）とすると、Ｉ（０３０）／Ｉ（１０４）＞
１でありかつＩ（０１２）／Ｉ（０３０）＞１なる関係
にあるα型結晶を主体とした結晶構造の酸化アルミニウ
ムで構成された酸化アルミニウム層は、一層すぐれた耐
摩耗性および耐欠損性を示すという知見を得たのであ
る。Therefore, the inventors of the present invention have conducted research to develop a surface-coated cutting tool coated with a composite hard layer including an aluminum oxide layer which is further excellent in wear resistance and fracture resistance. As a result, X-ray diffraction (10
If the peak intensity of the 4) plane is I (104), the peak intensity of the (030) plane is I (030), and the peak intensity of the (012) plane is I (012), then I (030) / I (104)>
The aluminum oxide layer composed of aluminum oxide having a crystal structure mainly composed of α-type crystals having a relationship of 1 and I (012) / I (030)> 1 has more excellent wear resistance and fracture resistance. We obtained the finding that
【０００７】この発明は、かかる知見にもとずいてなさ
れたものであって、基体表面に、チタン化合物層（Ｔｉ
Ｃ、ＴｉＮ、ＴｉＣＮ、ＴｉＣＯ、ＴｉＣＮＯなどのう
ちの単層または２種以上の複層からなる硬質被覆層）お
よび少なくとも１層の酸化アルミニウム層からなる複合
硬質層を被覆してなる切削工具において、前記酸化アル
ミニウム層は、Ｘ線回折による（１０４）面のピーク強
度をＩ（１０４）、（０３０）面のピーク強度をＩ（０
３０）、（０１２）面のピーク強度をＩ（０１２）とす
ると、Ｉ（０３０）／Ｉ（１０４）＞１でありかつＩ
（０１２）／Ｉ（０３０）＞１なる関係にあるα型結晶
を主体とした結晶構造の酸化アルミニウムで構成されて
いる表面被覆切削工具に特徴とするものである。The present invention has been made on the basis of such findings, and a titanium compound layer (Ti
C, TiN, TiCN, TiCO, TiCNO, etc., a hard coating layer consisting of a single layer or a multilayer of two or more kinds) and a cutting tool formed by coating a composite hard layer consisting of at least one aluminum oxide layer, In the aluminum oxide layer, the peak intensity of the (104) plane by X-ray diffraction is I (104), and the peak intensity of the (030) plane is I (0).
30), and the peak intensity of the (012) plane is I (012), I (030) / I (104)> 1 and I
It is characterized by a surface-coated cutting tool composed of aluminum oxide having a crystal structure mainly composed of α-type crystals having a relationship of (012) / I (030)> 1.
【０００８】この発明の表面被覆切削工具を製造するに
は、通常の表面を研削処理したサーメット製切削工具
（ＷＣ基超硬合金製切削工具なども含む）を基体とし、
この基体表面に、通常の化学蒸着法により少なくとも１
層のチタン化合物層を形成し、そのチタン化合物層の上
に、さらに少なくとも１層のこの発明の酸化アルミニウ
ム層を形成することにより作製される。この発明の酸化
アルミニウム層は、必ずしも最外層である必要はなく、
酸化アルミニウム層の上にさらに少なくとも１層のチタ
ン化合物層を被覆しても良い。この発明でα型結晶を主
体とするとは、α型結晶が８５％以上占めることであ
り、α型結晶が１００％存在しても良い。In order to produce the surface-coated cutting tool of the present invention, a cermet cutting tool (including a WC-based cemented carbide cutting tool) whose surface is usually ground is used as a base,
At least 1 is formed on the surface of the substrate by a conventional chemical vapor deposition method.
It is prepared by forming a titanium compound layer of a layer and further forming at least one aluminum oxide layer of the present invention on the titanium compound layer. The aluminum oxide layer of the present invention does not necessarily have to be the outermost layer,
At least one titanium compound layer may be further coated on the aluminum oxide layer. In the present invention, “α-type crystals as a main component” means that α-type crystals occupy 85% or more, and 100% of α-type crystals may be present.
【０００９】この発明のＩ（０３０）／Ｉ（１０４）＞
１であるような酸化アルミニウム層を形成するには、通
常の酸化アルミニウム層を形成するためのＨ2 Ｓガス：
０．０１〜２．０Ｖｏｌ％を含有する化学蒸着反応ガス
中にさらにＳＯ2 ガス：０．０１〜１．０Ｖｏｌ％を添
加した反応ガスを用いることにより形成される。また、
Ｉ（０１２）／Ｉ（０３０）＞１であるような酸化アル
ミニウム層を形成するには、前記Ｈ2 Ｓガス：０．０１
〜２．０Ｖｏｌ％およびＳＯ2 ガス：０．０１〜１．０
Ｖｏｌ％を含有する化学蒸着反応ガス中に、さらに通常
のＣＯ2 ガス量（１５Ｖｏｌ％以下）よりも多い２０〜
３０Ｖｏｌ％のＣＯ2 ガスを含む反応ガスを用いること
により形成される。I (030) / I (104) of the present invention>
To form an aluminum oxide layer such as 1, H 2 S gas for forming a normal aluminum oxide layer:
It is formed by using a reaction gas obtained by further adding SO 2 gas: 0.01 to 1.0 Vol% in a chemical vapor deposition reaction gas containing 0.01 to 2.0 Vol%. Also,
To form an aluminum oxide layer such that I (012) / I (030)> 1, the above H 2 S gas: 0.01
～2.0Vol% and SO 2 gas: 0.01-1.0
In the chemical vapor deposition reaction gas containing Vol%, more than the usual CO 2 gas amount (15 Vol% or less) 20 to
It is formed by using a reaction gas containing 30 Vol% CO 2 gas.
【００１０】Ｈ2 ＳガスおよびＳＯ2 ガスとは、 ２Ｈ2 Ｓ＋ＳＯ2 ＝３Ｓ＋２Ｈ2 Ｏ となるように反応してＳと水を生成し、さらに、生成し
た水は塩化アルミニウムと反応し、 Ｈ2 Ｏ＋２ＡｌＣｌ＝Ａｌ2 Ｏ3 ＋６ＨＣｌ となり、このときＩ（０３０）／Ｉ（１０４）＞１であ
るようなＡｌ2 Ｏ3 が生成されるものと考えられている
が、通常のＣＯ2 ガス量（１５Ｖｏｌ％以下）よりも多
い２０〜３０Ｖｏｌ％のＣＯ2 ガスを含む反応ガスを用
いることにより何故にＩ（０１２）／Ｉ（０３０）＞１
となるのかは明らかでない。The H 2 S gas and the SO 2 gas react with each other so that 2H 2 S + SO 2 = 3S + 2H 2 O to generate S and water, and the generated water reacts with aluminum chloride to produce H 2 S O + 2AlCl = Al 2 O 3 + 6HCl , and this time I (030) / I (104 )> is 1 Al 2 O 3 such that are considered to be generated, the normal amount of CO 2 gas (15 vol % (Less than or equal to 10%) by using a reaction gas containing 20 to 30% by volume of CO 2 gas, I (012) / I (030)> 1
It is not clear if
【００１１】[0011]
【実施例】つぎに、この発明の表面被覆切削工具の製造
法を実施例により具体的に説明する。通常の粉末冶金法
により製造した７２％ＷＣ−８％ＴｉＣ−１０％ＴａＣ
−１０％Ｃｏからなる成分組成（ＩＳＯ規格Ｐ３０相
当）を有しかつＩＳＯ規格のＳＮＭＧ４３２に定めた形
状の切削工具を用意した。EXAMPLES Next, the method for producing the surface-coated cutting tool of the present invention will be specifically described by way of examples. 72% WC-8% TiC-10% TaC manufactured by normal powder metallurgy
A cutting tool having a component composition of -10% Co (corresponding to ISO standard P30) and having a shape defined in ISO standard SNMG432 was prepared.
【００１２】実施例１ 前記切削工具を通常の化学蒸着装置に装入し、温度：１
０００℃、圧力：１００torr、反応ガス組成：４％Ｔｉ
Ｃｌ4 −１６％ＣＨ4 −８０％Ｈ2 、の条件で厚さ：５
μｍのＴｉＣ層を形成し、その上に、温度：１０００
℃、圧力：１００torr、反応ガス組成：５％ＴｉＣｌ4
−１５％ＣＨ4 −２０％Ｎ2 −６０％Ｈ2、の条件で厚
さ：２μｍのＴｉＣＮ層を形成し、さらにその上に、温
度：１０００℃、圧力：１００torr、反応ガス組成：５
％ＡｌＣｌ3 −３０％ＣＯ2 −０．６％Ｈ2 Ｓ−０．３
％ＳＯ2 −６４％Ｈ2 、の条件で厚さ：３μｍのＡｌ2
Ｏ3 層を形成し、本発明被覆切削工具１を作製した。Example 1 The cutting tool was placed in a conventional chemical vapor deposition apparatus and the temperature was set to 1
000 ° C, pressure: 100 torr, reaction gas composition: 4% Ti
Cl 4 -16% CH 4 -80% H 2 , thickness: 5
A TiC layer of μm is formed, and a temperature of 1000 is formed on the TiC layer.
° C, pressure: 100 torr, reaction gas composition: 5% TiCl 4
A TiCN layer having a thickness of 2 μm is formed under the conditions of -15% CH 4 -20% N 2 -60% H 2 , and further thereon, temperature: 1000 ° C., pressure: 100 torr, reaction gas composition: 5
% AlCl 3 -30% CO 2 -0.6% H 2 S-0.3
% SO 2 -64% H 2 , thickness: 3 μm Al 2
An O 3 layer was formed to produce the coated cutting tool 1 of the present invention.
【００１３】従来例１ 実施例１と同じ条件でＴｉＣ層およびＴｉＣＮ層を形成
した後、温度：１０００℃、圧力：５０torr、反応ガス
組成：５％ＡｌＣｌ3 −１０％ＣＯ2 −１．０％Ｈ2 Ｓ
−８４％Ｈ2 、の条件で厚さ：３μｍのＡｌ2 Ｏ3 層を
形成し、従来被覆切削工具１を作製した。Conventional Example 1 After forming a TiC layer and a TiCN layer under the same conditions as in Example 1, temperature: 1000 ° C., pressure: 50 torr, reaction gas composition: 5% AlCl 3 -10% CO 2 -1.0% H 2 S
An Al 2 O 3 layer having a thickness of 3 μm was formed under the condition of −84% H 2 , and the conventional coated cutting tool 1 was produced.
【００１４】実施例２ 前記切削工具を通常の化学蒸着装置に装入し、温度：１
０００℃、圧力：１００torr、反応ガス組成：５％Ｔｉ
Ｃｌ4 −１５％ＣＨ4 −２０％Ｎ2 −６０％Ｈ2、の条
件で厚さ：６μｍのＴｉＣＮ層を形成し、その上に、温
度：１０００℃、圧力：５０torr、反応ガス組成：５％
ＡｌＣｌ3 −２５％ＣＯ2 −０．４％Ｈ2 Ｓ−０．２％
ＳＯ2 −６９．４％Ｈ2 、の条件で厚さ：６μｍのＡｌ
2 Ｏ3 層を形成し、本発明被覆切削工具２を作製した。Example 2 The cutting tool was placed in a conventional chemical vapor deposition apparatus and the temperature was set to 1
000 ° C, pressure: 100 torr, reaction gas composition: 5% Ti
A TiCN layer having a thickness of 6 μm is formed under the conditions of Cl 4 -15% CH 4 -20% N 2 -60% H 2 , and temperature: 1000 ° C., pressure: 50 torr, reaction gas composition: 5 %
AlCl 3 -25% CO 2 -0.4% H 2 S-0.2%
SO 2 -69.4% H 2, conditions with a thickness of: 6 [mu] m of Al
A 2 O 3 layer was formed to produce the coated cutting tool 2 of the present invention.
【００１５】従来例２ 実施例２と同じ条件でＴｉＣＮ層を形成した後、温度：
１０００℃、圧力：５０torr、反応ガス組成：６％Ａｌ
Ｃｌ3 −８％ＣＯ2 −０．６％Ｈ2 Ｓ−８５．４％
Ｈ2 、の条件で厚さ：６μｍのＡｌ2 Ｏ3 層を形成し、
従来被覆切削工具２を作製した。Conventional Example 2 After forming a TiCN layer under the same conditions as in Example 2, temperature:
1000 ° C, pressure: 50 torr, reaction gas composition: 6% Al
Cl 3 -8% CO 2 -0.6% H 2 S-85.4%
An Al 2 O 3 layer having a thickness of 6 μm is formed under the condition of H 2 .
A conventional coated cutting tool 2 was produced.
【００１６】実施例３ この切削工具を通常の化学蒸着装置に装入し、温度：１
０００℃、圧力：１００torr、反応ガス組成：４％Ｔｉ
Ｃｌ4 −１６％ＣＨ4 −８０％Ｈ2 、の条件で厚さ：３
μｍのＴｉＣ層を形成し、その上に、温度：１０００
℃、圧力：１００torr、反応ガス組成：５％ＴｉＣｌ4
−５％ＣＯ−９０％Ｈ2 、の条件で厚さ：２μｍのＴｉ
ＣＯ層を形成し、さらにその上に、温度：１０００℃、
圧力：１００torr、反応ガス組成：５％ＴｉＣｌ4 −１
０％ＣＨ4 −１０％ＣＯ2 −１０％Ｎ2 −６５％Ｈ2 、
の条件で厚さ：１μｍのＴｉＣＮＯ層を形成し、その上
に、温度：１０００℃、圧力：１００torr、反応ガス組
成：５％ＡｌＣｌ3 −２０％ＣＯ2 −０．２％Ｈ2 Ｓ−
０．１％ＳＯ2 −７４．７％Ｈ2 、の条件で厚さ：４μ
ｍのＡｌ2 Ｏ3 層を形成し、本発明被覆切削工具３を作
製した。Example 3 This cutting tool was placed in a conventional chemical vapor deposition apparatus and the temperature was set to 1
000 ° C, pressure: 100 torr, reaction gas composition: 4% Ti
Cl 4 -16% CH 4 -80% H 2, conditions with a thickness of: 3
A TiC layer of μm is formed, and a temperature of 1000 is formed on the TiC layer.
° C, pressure: 100 torr, reaction gas composition: 5% TiCl 4
-5% CO-90% H 2 , conditions with a thickness of: 2 [mu] m of Ti
A CO layer is formed, and a temperature of 1000 ° C. is further formed on the CO layer.
Pressure: 100 torr, Reaction gas composition: 5% TiCl 4 -1
0% CH 4 -10% CO 2 -10% N 2 -65% H 2,
A TiCNO layer having a thickness of 1 μm is formed under the conditions of 1), temperature: 1000 ° C., pressure: 100 torr, reaction gas composition: 5% AlCl 3 -20% CO 2 -0.2% H 2 S-.
0.1% SO 2 -74.7% H 2 , conditions with a thickness of: 4 [mu]
m Al 2 O 3 layer was formed to prepare the coated cutting tool 3 of the present invention.
【００１７】実施例３と同じ条件でＴｉＣ層、ＴｉＣＯ
層およびＴｉＣＮＯ層を形成した後、温度：１０００
℃、圧力：５０torr、反応ガス組成：５％ＡｌＣｌ3 −
８％ＣＯ2 −０．３％Ｈ2 Ｓ−８６．７％Ｈ2 、の条件
で厚さ：４μｍのＡｌ2 Ｏ3 層を形成し、従来被覆切削
工具３を作製した。Under the same conditions as in Example 3, TiC layer and TiCO
After forming the layer and the TiCNO layer, the temperature: 1000
C, pressure: 50 torr, reaction gas composition: 5% AlCl 3 −
An Al 2 O 3 layer having a thickness of 4 μm was formed under the conditions of 8% CO 2 -0.3% H 2 S-86.7% H 2 to prepare a conventional coated cutting tool 3.
【００１８】実施例４ 前記切削工具を通常の化学蒸着装置に装入し、温度：１
０００℃、圧力：１００torr、反応ガス組成：４％Ｔｉ
Ｃｌ4 −１６％ＣＨ4 −８０％Ｈ2 、の条件で厚さ：２
μｍのＴｉＣ層を形成し、その上に、温度：１０００
℃、圧力：１００torr、反応ガス組成：５％ＴｉＣｌ4
−３５％Ｎ2 −６０％Ｈ2 、の条件で厚さ：２μｍのＴ
ｉＮ層を形成し、さらにその上に、温度：１０００℃、
圧力：１００torr、反応ガス組成：４％ＴｉＣｌ4 −１
６％ＣＨ4 −８０％Ｈ2 、の条件で厚さ：２μｍのＴｉ
Ｃ層を形成し、その上に、温度：１０００℃、圧力：１
００torr、反応ガス組成：５％ＡｌＣｌ3 −３０％ＣＯ
2 −１．０％Ｈ2 Ｓ−０．５％ＳＯ2 −６３．５％
Ｈ2 、の条件で厚さ：３μｍのＡｌ2 Ｏ3 層を形成し、
本発明被覆切削工具４を作製した。Example 4 The cutting tool was placed in a conventional chemical vapor deposition apparatus and the temperature was set to 1
000 ° C, pressure: 100 torr, reaction gas composition: 4% Ti
Cl 4 -16% CH 4 -80% H 2 , thickness: 2
A TiC layer of μm is formed, and a temperature of 1000 is formed on the TiC layer.
° C, pressure: 100 torr, reaction gas composition: 5% TiCl 4
-35% N 2 -60% H 2 , thickness: 2 μm T
An iN layer is formed, and a temperature of 1000 ° C. is further formed on the iN layer.
Pressure: 100 torr, Reaction gas composition: 4% TiCl 4 -1
Thickness of 6% CH 4 -80% H 2 , Ti: 2 μm
Form a C layer, on which temperature: 1000 ° C., pressure: 1
00 torr, reaction gas composition: 5% AlCl 3 -30% CO
2 -1.0% H 2 S-0.5 % SO 2 -63.5%
An Al 2 O 3 layer having a thickness of 3 μm is formed under the condition of H 2 .
The coated cutting tool 4 of the present invention was produced.
【００１９】従来例４ 実施例４と同じ条件でＴｉＣ層、ＴｉＮ層およびＴｉＣ
層を形成した後、温度：１０００℃、圧力：１００tor
r、反応ガス組成：５％ＡｌＣｌ3 −１０％ＣＯ2 −
１．５％Ｈ2 Ｓ−８３．５％Ｈ2 、の条件で厚さ：３μ
ｍのＡｌ2 Ｏ3 層を形成し、従来被覆切削工具４を作製
した。Conventional Example 4 Under the same conditions as in Example 4, TiC layer, TiN layer and TiC layer
After forming the layer, temperature: 1000 ° C., pressure: 100 torr
r, reaction gas composition: 5% AlCl 3 -10% CO 2-
Thickness: 3μ under the condition of 1.5% H 2 S-83.5% H 2 .
m Al 2 O 3 layer was formed, and the conventional coated cutting tool 4 was produced.
【００２０】実施例５〜８ 実施例１〜４で作製した本発明被覆切削工具１〜４のＡ
ｌ2 Ｏ3 層の表面に、さらに温度：１０００℃、圧力：
２００torr、反応ガス組成：２％ＴｉＣｌ4 −３８％Ｎ
2 −６０％Ｈ2 、の条件で厚さ：１μｍのＴｉＮ層を形
成し、本発明被覆切削工具５〜８を作製した。Examples 5-8 A of coated cutting tools 1 to 4 of the present invention produced in Examples 1 to 4
On the surface of the l 2 O 3 layer, further temperature: 1000 ° C., pressure:
200 torr, Reaction gas composition: 2% TiCl 4 -38% N
2 -60% H 2, conditions with a thickness of: to form a TiN layer of 1 [mu] m, to prepare a present invention coated cutting tool 5-8.
【００２１】従来例５〜８ 従来例１〜４で作製した従来被覆切削工具１〜４のＡｌ
2 Ｏ3 層の表面に、さらに温度：１０００℃、圧力：２
００torr、反応ガス組成：２％ＴｉＣｌ4 −３８％Ｎ2
−６０％Ｈ2 、の条件で厚さ：１μｍのＴｉＮ層を形成
し、従来被覆切削工具５〜８を作製した。Conventional Examples 5 to 8 Al of the conventional coated cutting tools 1 to 4 produced in Conventional Examples 1 to 4
On the surface of the 2 O 3 layer, temperature: 1000 ° C., pressure: 2
00 torr, reaction gas composition: 2% TiCl 4 -38% N 2
A TiN layer having a thickness of 1 μm was formed under the condition of −60% H 2 , and conventional coated cutting tools 5 to 8 were produced.
【００２２】これら本発明被覆切削工具１〜８および従
来被覆切削工具１〜８について、Ｘ線回折を行ない、
（０３０）面のピーク強度：Ｉ（０３０）に対する（１
０４）面のピーク強度：Ｉ（１０４）の比＝Ｉ（０３
０）／Ｉ（１０４）を求め、さらに（０１２）面のピー
ク強度：Ｉ（０１２）に対する（０３０）面のピーク強
度：Ｉ（０３０）の比＝Ｉ（０１２）／Ｉ（０３０）を
求め、それらの値を表１〜２に示した。The coated cutting tools 1 to 8 of the present invention and the conventional coated cutting tools 1 to 8 were subjected to X-ray diffraction,
Peak intensity of (030) plane: (1 with respect to I (030)
Ratio of peak intensity of plane 04: I (104) = I (03
0) / I (104), and the ratio of the peak intensity of the (012) plane: the peak intensity of the (030) plane: I (030) to the I (012) = I (012) / I (030) The values are shown in Tables 1-2.
【００２３】得られた本発明被覆切削工具１〜８および
従来被覆切削工具１〜８について、 被削材 ：ＳＣＭ４４０（硬さ：ＨB ２３０） 切削速度：２００ｍ／min 送 り：０．３mm／rev 切込み ：２．０mm 切削時間：３０min 冷却油 ：なし の条件で鋼の連続切削試験を行ない、切刃の逃げ面摩耗
幅を測定し、これらの結果も表１〜２に示し、With respect to the obtained coated cutting tools 1 to 8 of the present invention and conventional coated cutting tools 1 to 8, a work material: SCM440 (hardness: H B 230) cutting speed: 200 m / min feed: 0.3 mm / rev Depth of cut: 2.0 mm Cutting time: 30 min Continuous cutting test of steel under the condition of no cooling oil: The flank wear width of the cutting edge was measured, and these results are also shown in Tables 1-2.
【００２４】さらに、本発明被覆切削工具１〜８および
従来被覆切削工具１〜８について、 被削材 ：ＳＮＣＭ４３９（硬さ：ＨB ２３０）角材 切削速度：１００ｍ／min 送 り：０．２３６mm／rev 切込み ：３．０mm 切削時間：３０min 冷却油 ：なし の条件で鋼の断続切削試験を行ない、工具刃先が欠損に
至までの時間を測定し、これらの結果も表１〜２に示し
た。Further, regarding the coated cutting tools 1 to 8 of the present invention and the conventional coated cutting tools 1 to 8, the work material: SNCM439 (hardness: H B 230) square material Cutting speed: 100 m / min Feed: 0.236 mm / rev Depth of cut: 3.0 mm Cutting time: 30 min Cooling oil: The intermittent cutting test of the steel was conducted under the conditions, and the time until the tool edge was broken was measured, and these results are also shown in Tables 1-2.
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】[0027]
【発明の効果】表１〜２に示された結果から明らかなよ
うに、本発明被覆切削工具１〜８のＡｌ2 Ｏ3 層のＩ
（０３０）／Ｉ（１０４）の値はいずれも１より大であ
りかつＩ（０１２）／Ｉ（０３０）の値はいずれも１よ
り大であるが、従来被覆切削工具１〜８のＡｌ2 Ｏ3 層
のＩ（０３０）／Ｉ（１０４）の値はいずれも１以下で
ありかつＩ（０１２）／Ｉ（０３０）の値はいずれも１
以下であり、本発明被覆切削工具１〜８は従来被覆切削
工具１〜８に比べていずれも連続切削試験を行なった際
の逃げ面摩耗幅が小さくかつ断続切削試験による欠損に
至までの時間が長いことがわかる。As is clear from the results shown in Tables 1 and 2 , I of the Al 2 O 3 layer of the coated cutting tools 1 to 8 of the present invention is I.
The values of (030) / I (104) are all greater than 1 and the values of I (012) / I (030) are all greater than 1, but Al 2 of conventional coated cutting tools 1-8 The values of I (030) / I (104) of the O 3 layer are all 1 or less and the values of I (012) / I (030) are all 1
The following shows that the coated cutting tools 1 to 8 of the present invention each have a smaller flank wear width when a continuous cutting test is performed than the conventional coated cutting tools 1 to 8 and a time until a defect occurs in the intermittent cutting test. It turns out that is long.
【００２８】したがって、この発明の表面被覆切削工具
は、従来の表面被覆切削工具よりも一層優れた切削性能
を有しており、この発明の表面被覆切削工具を用いるこ
とにより切削工具交換回数などを減らすことができ、産
業の発展に大いに貢献しうるものである。Therefore, the surface-coated cutting tool of the present invention has a much higher cutting performance than that of the conventional surface-coated cutting tool. It can be reduced and it can greatly contribute to the development of industry.
Claims (1)
炭窒化物、炭酸化物および炭窒酸化物のうち１種の単層
または２種以上の複層、並びに少なくとも１層の酸化ア
ルミニウム層からなる複合硬質層を被覆してなる切削工
具において、 前記酸化アルミニウム層は、Ｘ線回折による（１０４）
面のピーク強度をＩ（１０４）、（０３０）面のピーク
強度をＩ（０３０）、（０１２）面のピーク強度をＩ
（０１２）とすると、 Ｉ（０３０）／Ｉ（１０４）＞１、 Ｉ（０１２）／Ｉ（０３０）＞１、 なる関係にあるα型結晶を主体とした結晶構造の酸化ア
ルミニウムで構成されていることを特徴とする表面被覆
切削工具。1. A titanium carbide or nitride on the surface of a substrate,
A cutting tool obtained by coating a composite hard layer composed of one kind of carbonitride, one of carbonic oxides and one of two or more kinds of carbonitrides, and at least one aluminum oxide layer, wherein the oxidation is Aluminum layer by X-ray diffraction (104)
The peak intensity of the plane is I (104), the peak intensity of the (030) plane is I (030), and the peak intensity of the (012) plane is I.
(012), I (030) / I (104)> 1, I (012) / I (030)> 1, and aluminum oxide having a crystal structure mainly composed of α-type crystals. A surface-coated cutting tool characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28003493A JP3236903B2 (en) | 1993-10-13 | 1993-10-13 | Surface coated cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28003493A JP3236903B2 (en) | 1993-10-13 | 1993-10-13 | Surface coated cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07108405A true JPH07108405A (en) | 1995-04-25 |
| JP3236903B2 JP3236903B2 (en) | 2001-12-10 |
Family
ID=17619378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28003493A Expired - Lifetime JP3236903B2 (en) | 1993-10-13 | 1993-10-13 | Surface coated cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3236903B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752644C2 (en) * | 1996-11-29 | 2003-06-26 | Hitachi Metals Ltd | Tool coated with alumina and manufacturing process therefor |
| JP2004195564A (en) * | 2002-12-16 | 2004-07-15 | Kyocera Corp | Surface-covered cutting tool and throw-away tip |
| WO2009107648A1 (en) | 2008-02-27 | 2009-09-03 | 京セラ株式会社 | Surface coated member and cutting tool |
-
1993
- 1993-10-13 JP JP28003493A patent/JP3236903B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752644C2 (en) * | 1996-11-29 | 2003-06-26 | Hitachi Metals Ltd | Tool coated with alumina and manufacturing process therefor |
| JP2004195564A (en) * | 2002-12-16 | 2004-07-15 | Kyocera Corp | Surface-covered cutting tool and throw-away tip |
| WO2009107648A1 (en) | 2008-02-27 | 2009-09-03 | 京セラ株式会社 | Surface coated member and cutting tool |
| US8449992B2 (en) | 2008-02-27 | 2013-05-28 | Kyocera Corporation | Surface-coated member and cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3236903B2 (en) | 2001-12-10 |
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