JP3712241B2 - Coated cutting tools and coated abrasion tool - Google Patents

Coated cutting tools and coated abrasion tool Download PDF

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JP3712241B2
JP3712241B2 JP2591895A JP2591895A JP3712241B2 JP 3712241 B2 JP3712241 B2 JP 3712241B2 JP 2591895 A JP2591895 A JP 2591895A JP 2591895 A JP2591895 A JP 2591895A JP 3712241 B2 JP3712241 B2 JP 3712241B2
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oxidation
coated
film
table
cutting tools
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Expired - Fee Related
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JPH08199338A (en )
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広志 植田
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日立ツール株式会社
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【0001】 [0001]
【産業上の利用分野】 BACKGROUND OF THE INVENTION
本願発明は、耐摩耗性、耐欠損性に優れる切削工具として用いられる被覆切削工具及び耐摩耗工具として用いられる被覆耐摩工具に関する。 The present invention provides abrasion resistance, relates to coated wear tool used as a coated cutting tools and wear-resistant tools used as a cutting tool having excellent chipping resistance.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
従来PVD法による硬質皮膜は、TiNが主流であったが、最近TiCN膜あるいは(TiAl)Nといった新しい種類の皮膜が開発され注目されてきている。 Hard coating according to a conventional PVD method, although TiN has been mainly, recently a new type of film, such as TiCN film or (TiAl) N have been noted been developed. TiCNはビッカース硬さが3000近くあり、TiNのビッカース硬さ2200に比べ格段に硬く耐摩耗性を著しく高める効果も持つ。 TiCN is Vickers hardness near 3000, also has the effect of increasing significantly the much harder wear resistance compared to the Vickers hardness 2200 TiN. 一方(TiAl)NはTiとAlの比率により異なるが、概略2300〜2800のビッカース硬さを有し、TiNに比べ耐摩耗性を高める一方耐酸化性が優れるため刃先が高温になる切削条件下などで優れた特性を発揮するものである。 On the other hand (TiAl) N is different by the ratio of Ti and Al, have a Vickers hardness of schematic 2300-2800, cutting conditions edge for one oxidation resistance enhancing the wear resistance as compared to TiN is excellent in a high temperature it is intended to demonstrate the excellent characteristics such as.
【0003】 [0003]
又、(TiAl)N膜の皮膜の改善としてTi/Alの比率を限定した特公平5−67705号や、(TiAlZr)N、(TiAlV)Nといった更に多元系の皮膜にした米国特許4871434号等が提案され、更に改善が計られている。 Further, (TiAl) film JP and fair 5-67705 Patent for limiting the ratio of Ti / Al as an improvement of the N film, (TiAlZr) N, (TiAlV) were further film of multi-element such as N U.S. Patent 4,871,434 No. and the like There are proposed, have been scaled further improvement. しかしながらこれらの新しい皮膜は、上述の長所を有するものの耐酸化性においてはまだ十分に満足されるものではない。 However, these new coatings, not to be still fully satisfactory in oxidation resistance of which has the advantages described above.
【0004】 [0004]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
その理由は、上述のAlを含む皮膜は確かに酸化開始温度は、TiN、TiCNに比べ高く、耐酸化性には優れるものの酸化が連続的に進行する条件下においては酸化進行速度は、TiN、TiCNと比べほとんど変わりのないものである。 The reason is that the film is certainly oxidation initiation temperature containing Al described above, TiN, higher than that TiCN, oxidation rate of progression in conditions where the oxidation of those excellent in oxidation resistance progresses continuously is, TiN, those without little change compared with TiCN. つまり、酸化により生成する酸化皮膜は、TiN、TiCNの場合と同様Alを含有する皮膜においても、ルチル構造を有し、ポーラスな皮膜である。 That is, the oxide film formed by oxidation, TiN, even in coatings containing the same Al as in the case of TiCN, have a rutile structure, a porous film.
従って、酸化進行に対する抵抗は、ルチル構造であるがために極めて低い結果となるわけである。 Therefore, resistance to oxidation progress is not a very low result for is a rutile structure.
【0005】 [0005]
【本発明の目的】 An object of the present invention]
本発明は、TiとAlを含有する窒化物、炭窒化物皮膜の耐酸化性をさらに改善し、酸化が連続的に進む高速切削において、より長寿命を示す皮膜を提供するものである。 The present invention is a nitride containing Ti and Al, to improve further the oxidation resistance of carbonitrides film, in high-speed cutting oxidation proceeds continuously, there is provided a film that shows a longer lifetime.
【0006】 [0006]
【課題を解決するための手段】 In order to solve the problems]
そのため、本発明は(TiAl)Nを基本にこれに各種元素を添加する検討を行った結果、Yの添加により耐酸化性が著しく改善される知見を得た。 Therefore, the present invention is the result of investigations of adding it to the various elements in the basic (TiAl) N, to obtain a knowledge oxidation resistance is significantly improved by the addition of Y.
表1は、3μmの(TiAl)N皮膜をアークイオンプレーティング法により、バイアス電圧120V、窒素圧力10 -1 Paの条件下で成膜するときにYを添加した場合の酸化開始温度、及び850℃大気中での酸化速度を、3μmのTiN、(Ti 0.5 Al 0.5 )N皮膜と比較した結果を示す。 Table 1, by 3μm of a (TiAl) N coating arc ion plating method, a bias voltage 120V, oxidation starting temperature in the case of addition of Y when film under the conditions of nitrogen pressure 10 -1 Pa, and 850 ℃ the oxidation rate in air shows 3μm of TiN, the results of a comparison with the (Ti 0.5 Al 0.5) N film.
【0007】 [0007]
【表1】 [Table 1]
【0008】 [0008]
表1より、(TiAl)N皮膜中にYを固溶体化させることにより、皮膜の耐酸化性が向上することがわかる。 From Table 1, by solid solution of Y in (TiAl) N coating, it can be seen that the improved oxidation resistance of the coating. よって、本願発明は、主成分としてTiとAlまたはその固溶体の窒化物、炭窒化物、炭化物より構成された0.5〜15μmの膜厚から成る硬質皮膜を被覆した被覆切削工具・被覆耐摩耗工具において、該硬質皮膜は、アークイオンプレーティングにより成膜され、且つ、該硬質皮膜の主成分の1部をイットリウムで置換し、該硬質皮膜の組成をモル比で、(TiaAlbYc) CxN1−x と表した場合、a、b、c、xがそれぞれ、a+b+C=1、0.3≦a≦0.7、0.3≦b≦0.7、0.01<c≦0.20、0≦x≦1、であることを特徴とする被覆切削工具・被覆耐摩耗工具であり、更に、 該硬質皮膜の層と、Alの窒化物または炭窒化物、またはTiの窒化物または炭窒化物、またはTiAlの固溶体の窒化物 Accordingly, the present invention, Ti and Al or a nitride of the solid solution as a main component, carbon nitride, coated cutting tools and coated abrasion coated with a hard film made of a film thickness of 0.5~15μm constructed from a carbide in the tool, hard coating is deposited by arc ion plating, and, a part of the main component of the hard coating was replaced by yttrium, in molar ratio the composition of the hard film, (TiaAlbYc) (CxN1- when expressed as x), a, b, c , x , respectively, a + b + C = 1,0.3 ≦ a ≦ 0.7,0.3 ≦ b ≦ 0.7,0.01 <c ≦ 0.20 , 0 ≦ x ≦ 1, a coated cutting tool-coated wear-resistant tool, characterized in that a further, a layer of hard coating, nitride or carbonitride Al or nitride or a carbonitride of Ti, nitrides, or nitrides of a solid solution of TiAl たは炭窒化物から成る層を5層以上の多層または積層にして、耐酸化性・高硬度を達成したものである。 Other by a layer consisting of carbonitrides 5 or more layers or laminate is obtained by achieving oxidation resistance and high hardness.
【0009】 [0009]
【作用】 [Action]
上記のように(TiAl)化合物の皮膜中にYを添加することにより、皮膜の耐酸化性を向上させることが可能である。 By adding Y in the coating of the above-mentioned manner (TiAl) compound, it is possible to improve the oxidation resistance of the coating. 特に酸化速度において著しい改善が可能になる理由は、Yを添加した場合、形成される酸化皮膜の形態がルチル構造ではなくアナターゼ構造を示すためである。 Why particularly allowing significant improvement in the oxidation rate, if the addition of Y, the form of oxide film formed is to show the anatase structure rather than a rutile structure. つまり、Y添加により非常に緻密な酸化膜が形成され酸化の進行が形成された酸化膜中の酸素の拡散に律速される形態をとることにより、酸化の進行が著しく抑制されるわけである。 That is, by taking a very forms dense oxide film is formed progress of oxidation is limited by the diffusion of oxygen in the oxide film formed by Y addition, it is not the progression of oxidation is greatly suppressed.
従って、酸化が連続的に進行する高速切削において、皮膜の酸化がごく表面のみで発生し、これが酸化に対し保護膜として作用し、皮膜内部にまで酸化が進行せず、長寿命が得られるわけである。 Therefore, in high speed cutting where oxidation proceeds continuously, occurs only in very surface oxidation of the film, which acts as a protective film against oxidation, without oxidation proceeds to the inside film, not long life can be obtained it is.
【0010】 [0010]
以下、数値限定した理由に付いて説明する。 Below, a description is given to the reason for the numerical limitation.
(TiAl)化合物膜中に固溶体/混合体として添加するYは、0.01以下では耐酸化性を向上するのに必ずしも十分な効果がなく、0.20を越えると皮膜の硬さが著しく低下し、著しく劣化する傾向にあるため0.01<c≦0.20の範囲とした。 (TiAl) Y to be added to the compound film as a solid solution / mixture is not necessarily sufficient effect to a 0.01 or less to improve the oxidation resistance is significantly reduced hardness of the film exceeds 0.20 and was in the range of 0.01 <c ≦ 0.20 for tends to significantly deteriorate.
尚、上記の元素はターゲット材として固溶体化しても、また各元素を個別のターゲットとして蒸着時に成分を調整しても、さらに固溶体ターゲットと個別ターゲットを組み合わせても同様の効果が得られる。 The above elements are also solid solution as the target material, and also to adjust the components at the time of evaporation of each element as a separate target, the same effect can be obtained in further combination with solid solution target and individual targets.
【0012】 [0012]
次に、Tiの量は0.7を越えると反対にAlの含有量が少なくなり、耐酸化性を劣化し0.3未満であると著しく硬さが低下するため0.3≦a≦0.7とした。 Then, the amount of Ti becomes small content of Al in the opposite exceeds 0.7, 0.3 ≦ a ≦ 0 for significantly hard as to degrade the oxidation resistance of less than 0.3 is reduced It was .7. 皮膜中のCNの比率は、0≦x≦1、すなわち炭化物、窒化物、炭窒化物の範囲としたのは、(TiAl)膜中に固溶体/混合体として添加したYの効果により耐酸化性が改善されるため、窒化物よりさらに耐酸化性の悪い炭化物でも十分に使用でき、また硬さのやや低い窒化物、炭窒化物においても極端な耐摩耗性の劣化はないため0≦x≦1の範囲とした。 The ratio of the CN in the film is, 0 ≦ x ≦ 1, namely carbides, nitrides, had a range of carbonitrides, oxidation resistance by the effect of Y added as a solid solution / mixture in (TiAl) film because There is improved, can also be used satisfactorily in more oxidation resistant poor carbides of nitride, also slightly lower nitride hardness, 0 ≦ x ≦ since no extreme wear resistance deteriorated even carbonitride It was one of the range.
また、多層叉は積層化については5層以上にしないと個々の層の粒子の微細化が実現されず、硬さの向上が認められないため5層以上とした。 Further, multilayer or the Failure to 5 or more layers for laminated not realize the miniaturization of the individual layers particles was 5 or more layers for improving the hardness is not observed.
以下、実施例により本願発明を詳細に説明する。 Hereinafter, explaining the present invention in detail by way of Examples.
【0013】 [0013]
【実施例1】 [Example 1]
84WC−3TiC−1TiN−3TaC−9Coの組成になるよう市販の2.5μmのWC粉末、1.5μmのTiC粉末、同TiN粉末、1.2μmのTaC粉末をボールミルにて96時間混合し、乾燥造粒の後、SNMG432のTAインサートをプレスし、焼結後、所定の形状に加工した。 84WC-3TiC-1TiN-3TaC-9Co commercial 2.5 [mu] m WC powder so that the composition of, 1.5 [mu] m of TiC powder, the TiN powder, TaC powder of 1.2μm was mixed for 96 hours in a ball mill, dried after granulation and pressed the TA insert SNMG432, after sintering, and processed into a predetermined shape.
この超硬合金基体上にPVD法により、各種(TiAlY)合金のターゲットを用い、表2に示すような皮膜を形成した。 By PVD on the cemented carbide substrate, using a target of various (TiAlY) alloy, thereby forming a film as shown in Table 2.
尚、比較のため従来例で記載した膜も形成した。 Incidentally, it was also formed film described in the prior art for comparison.
【0014】 [0014]
【表2】 [Table 2]
【0015】 [0015]
次いで、これらの皮膜をコーティングされたスローアウェイインサートを大気中で徐々に昇温し、酸化増が認められる温度を測定した。 Then, the throw-away insert of these coatings were coated gradually heated in air, the temperature was measured to increase the oxidation is observed. また、大気中900℃において、時間とともに酸化増量を測定し、酸化速度を算出した。 Also, at 900 ° C. in air, and measure the oxidized amounts over time, it was calculated oxidation rate. これらの結果も表2に併記する。 These results are also shown in Table 2.
更に、下記に示す高速切削条件にて切削テストを行い最大摩耗が0.2mmに達するまでの時間を求め、その結果も表2に併記する。 Furthermore, the maximum wear perform cutting test at high-speed cutting conditions shown in the seek time to reach 0.2 mm, the result is also shown in Table 2.
被削材 S50C (Hs32) Workpiece S50C (Hs32)
切削速度 300m/min Cutting speed of 300m / min
送り 0.15mm/rev Feed 0.15mm / rev
切込み 1mm Cuts 1mm
切削油 なし【0016】 No cutting oil [0016]
表2より、Yを添加した皮膜は、格段に酸化速度が遅く、また、そのことが連続高速切削において著しい長寿命化に寄与している事が明らかである。 From Table 2, coating with the addition of Y is much oxidation is slow, and it is clear that the fact contributes to significant long life in continuous high-speed cutting.
【0017】 [0017]
【実施例2】 [Example 2]
実施例1で用いた同一の超硬合金スローアウェイインサートを用い、表3に示す皮膜成分系の多層叉は積層化を行った。 Using the same cemented carbide throwaway insert used in Example 1, a multilayer or the coating component system shown in Table 3 were laminated. この場合、皮膜の総厚さは8μmに統一した。 In this case, the total thickness of the film was unified to 8μm. 次いで、耐酸化性の評価を実施例1と同様に行い、その結果を表4に示す。 Then, evaluates the oxidation resistance in the same manner as in Example 1. The results are shown in Table 4. また、ウルトラマイクロビッカース(荷重10g)にて硬さの測定を行った結果も表4に併記する。 Also shown in Table 4 result of measurement of hardness in an ultra micro Vickers (load 10 g).
【0018】 [0018]
【表3】 [Table 3]
【0019】 [0019]
【表4】 [Table 4]
【0020】 [0020]
表3より、多層叉は積層化することにより、硬さの向上が認められるとともに1600層(1層当たり5nm)の場合には著しい硬さの向上が認められることが明かである。 From Table 3, multilayer or by laminating, it is clear that is observed a remarkable improvement in hardness in the case of the 1600 layers together is observed improvement in the hardness (5 nm per layer).
【0021】 [0021]
【発明の効果】 【Effect of the invention】
本発明の被覆切削工具・被覆耐摩耗工具は、従来のTiN、TiAlNに比べ、Yを添加することにより、耐酸化性、とりわけ耐酸化速度を向上させ、格段に長い工具寿命が得られるものである。 Coated cutting tools and coated wear-resistant tools of the invention, conventional TiN, compared to TiAlN, by adding Y, oxidation resistance, is especially improving oxidation speed, in which remarkably longer tool life can be obtained is there. また、本発明は超硬合金を主に説明してきたがTiCN基サーメットに適用した場合、及び高速度鋼に適用した場合にも優れた効果を現すことは自明である。 Further, the present invention if has been primarily described cemented carbide applied to TiCN-based cermet, and to exhibit an excellent effect even when applied to a high speed steel is obvious.

Claims (2)

  1. 主成分としてTiとAlまたはその固溶体の窒化物、炭窒化物、炭化物より構成された0.5〜15μmの膜厚から成る硬質皮膜を被覆した被覆切削工具・被覆耐摩耗工具において、該硬質皮膜は、アークイオンプレーティングにより成膜され、且つ、該硬質皮膜の主成分の1部をイットリウムで置換し、該硬質皮膜の組成をモル比で、(TiaAlbYc) CxN1−x と表した場合、a、b、c、xがそれぞれ、a+b+C=1、0.3≦a≦0.7、0.3≦b≦0.7、0.01<c≦0.20、0≦x≦1、であることを特徴とする被覆切削工具・被覆耐摩耗工具 Ti and Al or a nitride of the solid solution as a main component, carbonitrides, in coated cutting tools and coated wear-resistant tool coated with a hard film made of a film thickness of 0.5~15μm constructed from a carbide, hard coating It is deposited by arc ion plating, and, a part of the main component of the hard coating was replaced by yttrium, in molar ratio the composition of the hard film, when expressed as (TiaAlbYc) (CxN1-x) , a, b, c, x, respectively, a + b + C = 1,0.3 ≦ a ≦ 0.7,0.3 ≦ b ≦ 0.7,0.01 <c ≦ 0.20,0 ≦ x ≦ 1 coated cutting tools and coated wear-resistant tool, characterized in that a.
  2. 請求項1記載の被覆切削工具・被覆耐摩耗工具において、 該硬質皮膜の層と、Alの窒化物または炭窒化物、またはTiの窒化物または炭窒化物、またはTiAlの固溶体の窒化物または炭窒化物から成る層を5層以上の多層または積層にしたことを特徴とする被覆切削工具・被覆耐摩耗工具 In coated cutting tools and coated wear-resistant tool of claim 1 wherein a layer of hard coating, nitride or carbonitride Al, or nitride or carbonitride Ti, or TiAl nitride or carbonitride solid solution a layer of a nitride of more than 5-layered or coated cutting tool-coated wear-resistant tool, characterized in that a laminated.
JP2591895A 1995-01-20 1995-01-20 Coated cutting tools and coated abrasion tool Expired - Fee Related JP3712241B2 (en)

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US7144639B2 (en) * 2002-01-31 2006-12-05 Mitsubishi Materials Corporation Surface-coated cutting tool member having hard coating layer and method for forming the hard coating layer on surface of cutting tool
WO2004000494A1 (en) 2002-06-25 2003-12-31 Mitsubishi Materials Corporation Coated cutting tool member
JP5118381B2 (en) * 2007-04-10 2013-01-16 エリコン・トレーディング・アクチェンゲゼルシャフト,トリュープバッハOerlikon Trading AG,Truebbach Tool having a protective layer system
JP5692635B2 (en) * 2010-11-16 2015-04-01 三菱マテリアル株式会社 Surface-coated cutting tool
JP5692636B2 (en) * 2010-11-16 2015-04-01 三菱マテリアル株式会社 Surface-coated cutting tool
JP2014122400A (en) * 2012-12-21 2014-07-03 Kobe Steel Ltd Hard film excellent in cohesion resistance to soft metal

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