JP2002254204A - Surface-coated cemented carbide cutting tool having excellent surface lubricating property for chip - Google Patents

Surface-coated cemented carbide cutting tool having excellent surface lubricating property for chip

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JP2002254204A
JP2002254204A JP2001048327A JP2001048327A JP2002254204A JP 2002254204 A JP2002254204 A JP 2002254204A JP 2001048327 A JP2001048327 A JP 2001048327A JP 2001048327 A JP2001048327 A JP 2001048327A JP 2002254204 A JP2002254204 A JP 2002254204A
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surface
cemented carbide
layer
cutting
coated cemented
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Kazunori Sato
Yusuke Tanaka
和則 佐藤
裕介 田中
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Mmc Kobelco Tool Kk
エムエムシーコベルコツール株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a surface-coated cemented carbide cutting tool having an excellent surface lubricating property for chips.
SOLUTION: In the surface-coated cemented carbide cutting tool of which the surface of a tool substrate composed of tungsten carbide group cemented carbide or titanium carbo-nitride group cermet is physically deposited with high toughness coating layers each having an average thickness of 0.5 to 15 μm and composed of a single layer of one type or a plurality of layers of two types among a compound nitride layer and a compound carbonitride layer of Ti and Al, a lubricating coating layer composed of a zirconium oxide layer having an average thickness of 0.5 to 15 μm is physically deposited on the surface of the high toughness coating layer.
COPYRIGHT: (C)2002,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】この発明は、切粉に対する表面潤滑性にすぐれ、したがって特にステンレス鋼や軟鋼などのきわめて粘性が高く、かつ切粉が切刃表面に溶着し易い難削材の切削加工に用いた場合に、切刃に欠けやチッピング(微小欠け)などの発生なく、すぐれた切削性能を長期に亘って発揮する表面被覆超硬合金製切削工具(以下、被覆超硬工具という)に関するものである。 TECHNICAL FIELD The present invention is excellent in surface lubricity for chips, therefore very particularly high viscosity, and swarf cutting of the welding easily hard-to-cut materials on the cutting edge surface, such as stainless steel or mild steel in the case of using, in the missing or chipping (micro-chipping) without occurrence of cutting, superior cutting performance prolonged over the surface coated cemented carbide cutting tool exhibits (hereinafter, referred coated cemented carbide tool) about it is intended.

【0002】 [0002]

【従来の技術】一般に、切削工具には、各種の鋼や鋳鉄などの被削材の旋削加工や平削り加工にバイトの先端部に着脱自在に取り付けて用いられるスローアウエイチップ、前記被削材の穴あけ切削加工などに用いられるドリルやミニチュアドリル、さらに前記被削材の面削加工や溝加工、肩加工などに用いられるソリッドタイプのエンドミルなどがあり、また前記スローアウエイチップを着脱自在に取り付けて前記ソリッドタイプのエンドミルと同様に切削加工を行うスローアウエイエンドミル工具などが知られている。 In general, the cutting tools, various indexable used in removably attached to the tip of the turning and planing byte of the workpiece such as steel or cast iron, the work material mounting of drilling cutting drill or miniature drill used for like, include further the scalping processing and groove processing of the workpiece, the solid type used in such shoulder working end mills, also removably said indexable wherein such solid type throw-away end mill tool that performs cutting as with the end mill is known Te.

【0003】また、一般に、例えば図1に概略説明図で示される物理蒸着装置の1種であるアークイオンプレーティング装置を用い、ヒータで装置内を、例えば雰囲気を1.3×10 -3 Paの真空として、500℃の温度に加熱した状態で、アノード電極と、所定組成を有するT [0003] In general, for example, using an arc ion plating apparatus which is a kind of physical vapor deposition apparatus shown in schematic illustration in FIG. 1, in the apparatus with a heater, for example an atmosphere of 1.3 × 10 -3 Pa as the vacuum, while heating to a temperature of 500 ° C., T having an anode electrode, a predetermined composition
i−Al合金がセットされたカソード電極(蒸発源)との間にアーク放電を発生させ、同時に装置内に反応ガスとしてメタンガスおよび/または窒素ガスを導入し、一方炭化タングステン(以下、WCで示す)基超硬合金または炭窒化チタン(以下、TiCNで示す)基サーメットからなり、かつ前記アノード電極およびカソード電極と所定間隔をもって対向配置された工具基体(以下、これらを総称して超硬基体と云う)には、例えば−120 i-Al alloy the set cathode (evaporation source) to generate an arc discharge between the introduced methane and / or nitrogen gas as a reaction gas at the same time in the apparatus, whereas tungsten carbide (hereinafter, denoted by WC ) based cemented carbide or titanium carbonitride (hereinafter, shown by TiCN) consists based cermet, and the anode electrode and the cathode electrode and the counter at predetermined intervals arranged tool substrate (hereinafter, the carbide substrate collectively these to say), for example -120
Vのバイアス電圧を印加した条件で、前記超硬基体の表面に、例えば特開昭62−56565号公報に記載されるように、TiとAlの複合窒化物[以下、(Ti,A Under the conditions of applying a bias voltage V, and the surface of the carbide substrate, as described in JP-Sho 62-56565, a composite nitride of Ti and Al [hereinafter, (Ti, A
l)Nで示す]層および複合炭窒化物[以下、(Ti, l) shown by N] layer and the composite carbonitride [hereinafter, (Ti,
Al)CNで示す]層のうちの1種の単層または2種の複層からなる強靭性被覆層を0.5〜15μmの平均層厚で物理蒸着することにより製造された被覆超硬切削工具が知られている。 Al) indicated by CN] 1 or a single-layer or two consisting of multilayered tough coating layer was prepared by physical vapor deposition with an average layer thickness of 0.5~15μm coated cemented carbide cutting of the layer tool is known.

【0004】 [0004]

【発明が解決しようとする課題】近年の切削加工装置のFA化はめざましく、一方で切削加工に対する省力化および省エネ化、さらに低コスト化の要求は強く、これに伴い、切削工具には1種類の工具でできるだけ多くの材種の被削材を切削加工できる汎用性が求められる傾向にあるが、上記の従来被覆超硬工具においては、これを鋼や鋳鉄などの切削加工に用いた場合には問題はないが、 FA of the [0004] Recent cutting device is remarkable, while the labor saving and energy saving for cutting, further cost reduction strongly demanded, with this, the cutting tool 1 type tends to versatility capable cutting as many grades of the workpiece by the tool is required, in the conventional coated cemented carbide tool described above, which when used in cutting such as steel or cast iron Although there is no problem,
これをきわめて粘性の高いステンレス鋼や軟鋼などの被削材の切削に用いた場合には、これら被削材の切粉は、 In the case of using this very cutting of the workpiece, such as a viscous stainless steel or mild steel, the chips of the workpiece,
被覆層を構成する(Ti,Al)N層や(Ti,Al) Constituting the coating layer (Ti, Al) N layer and (Ti, Al)
CN層に対する親和性が高いために、切刃表面に溶着し易く、この溶着現象が原因で切刃に欠けやチッピングが発生し、この結果比較的短時間で使用寿命に至るのが現状である。 Because of the high affinity for CN layer, easily welded to the cutting edge surface, the welding phenomenon chipping or chipping occurs in the cutting edge because there currently that lead to this result relatively short time service life .

【0005】 [0005]

【課題を解決するための手段】そこで、本発明者等は、 Means for Solving the Problems] The present inventors have
上述のような観点から、特にステンレス鋼や軟鋼などの切削加工に用いた場合にも、切刃表面に切粉の溶着し難い被覆超硬工具を開発すべく研究を行った結果、上記の従来被覆超硬工具の表面に、酸化ジルコニウム(以下、 From the viewpoint described above, particularly in the case of using the cutting such as stainless steel or mild steel, as a result of studies to develop a welding hard coated cemented carbide cutting chips to the cutting edge surface, the above conventional the surface of the coating cemented carbide, zirconium oxide (hereinafter,
ZrO 2で示す)層を物理蒸着すると、この結果のZr When physical vapor deposition of ZrO 2 indicated by) layer, the result Zr
2層が上記の通常の被覆層の表面に最表面層として物理蒸着された被覆超硬工具においては、前記最表面層を構成するZrO 2層の被削材、特にステンレス鋼や軟鋼などの粘性の高い難削材に対する親和性がきわめて低く、この結果切刃に切粉が溶着することがない、すなわち前記ZrO 2層がすぐれた表面潤滑性を発揮することから、切刃に欠けやチッピングの発生がなくなり、長期に亘ってすぐれた切削性能を発揮するようになる、という研究結果を得たのである。 On the surface of the O 2 layers above conventional coating layer in the physical vapor deposited coating cemented carbide tool as the outermost layer, wherein the workpiece of ZrO 2 layer constituting the outermost surface layer, in particular stainless steel or mild steel etc. affinity for highly viscous difficult-to-cut materials is very low, as a result chips the cutting edge will not be welded, that is, from exerting the surface lubricity of the ZrO 2 layer is excellent, and chipping the cutting edge chipping there is no occurrence, so to exert superior cutting performance over a long period of time, is to obtain a finding that.

【0006】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、超硬基体の表面に、(Ti,A [0006] This invention was made based on the above findings, the surface of the carbide substrate, (Ti, A
l)N層および(Ti,Al)CN層のうちの1種の単層または2種の複層からなる強靭性被覆層を0.5〜1 l) N layer and (Ti, one single layer or two or toughness coating layer consisting of multiple layers of one of Al) CN layer 0.5-1
5μmの平均層厚で物理蒸着してなる被覆超硬切削工具において、上記強靭性被覆層の表面に、ZrO 2層からなる潤滑性被覆層を0.5〜15μmの平均層厚で物理蒸着してなる、切粉に対する表面潤滑性にすぐれた被覆超硬切削工具に特徴を有するものである。 In coating cemented carbide cutting tools formed by physical vapor deposition with an average layer thickness of 5 [mu] m, the surface of the toughness coating layer, and a physical vapor deposition lubricity coating layer made of ZrO 2 layer with an average layer thickness of 0.5~15μm comprising Te, and it has the characteristics to the coated cemented carbide cutting tool having excellent surface lubricity for chips.

【0007】なお、この発明の被覆超硬切削工具において、これを構成する強靭性被覆層、および潤滑性被覆層の平均層厚を上記の通りに限定した理由を説明する。 [0007] Incidentally, in the coating cemented carbide cutting tools of the present invention, toughness coating layer constituting the same, and the average layer thickness of the lubricating coating layer is described the reason for limiting as described above. (a)強靭性被覆層 その平均層厚が0.5μm未満では所望のすぐれた強靭性を確保することができず、この結果切刃に欠けやチッピング(微小欠け)が発生し易くなり、一方その層厚が15μmを越えると、上記の密着性下地被覆層の層厚と相俟って、切削時の熱塑性変形が一段と起り易くなり、 The average layer thickness (a) toughness coating layer is less than 0.5μm is not able to ensure the desired excellent toughness, result chipping the cutting edge and chipping (micro-chipping) is likely to occur, whereas If the layer thickness exceeds 15 [mu] m, I layer thickness coupled with the adhesion undercoat layer, tends to occur thermal plastic deformation during cutting is more,
これが原因の切刃偏摩耗によって使用寿命が短縮化するようになることから、その平均層厚を0.5〜15μm From this it is to be shortened service life by cutting uneven wear causes, 0.5 to 15 m and the average layer thickness
と定めた。 It was defined as. (b)潤滑性被覆層 その平均層厚が0.5μm未満では所望のすぐれた潤滑性を確保することができず、一方その平均層厚が15μ (B) in the lubricating coating layer less than the average layer thickness of 0.5μm can not be ensured the desired excellent lubricity, whereas the average layer thickness thereof is 15μ
mを越えると切刃に偏摩耗が発生し易くなり、これが摩耗進行を促進するようになることから、その平均層厚を0.5〜15μmと定めた。 It exceeds m easily uneven wear occurs in the cutting edge, which from becoming to promote the wear progress, determined the average layer thickness and 0.5 to 15 m. なお、上記の潤滑性被覆層の上に、必要に応じてTiN層を0.1〜2μmの平均層厚で形成してもよく、これはTiN層が黄金色の色調を有し、この色調によって切削工具の使用前と使用後の識別が容易になるという理由からで、この場合その層厚が0.1μm未満では前記色調の付与が不十分であり、 Incidentally, on the lubricating coating layer may be formed with an average layer thickness of 0.1~2μm a TiN layer as required, which TiN layer has a color tone of the golden color, the tone by the reason that it is easy to identify the before and after use of the cutting tool by the layer thickness in this case is the application of the color tone is less than 0.1μm is insufficient,
一方前記色調の付与は2μmまでの平均層厚で十分である。 On the other hand impart the color tone is sufficient with an average layer thickness of up to 2 [mu] m.

【0008】 [0008]

【発明の実施の形態】ついで、この発明の被覆超硬切削工具を実施例により具体的に説明する。 DETAILED DESCRIPTION OF THE INVENTION Next, specifically described by examples coated cemented carbide cutting tool of the present invention. (実施例1)原料粉末として、いずれも1〜3μmの平均粒径を有するWC粉末、TiC粉末、ZrC粉末、V (Example 1) Raw material powder, WC powder both having an average particle size of 1 to 3 [mu] m, TiC powder, ZrC powder, V
C粉末、TaC粉末、NbC粉末、Cr 32粉末、T C powder, TaC powder, NbC powder, Cr 3 C 2 powder, T
iN粉末、TaN粉末、およびCo粉末を用意し、これら原料粉末を、表1に示される配合組成に配合し、ボールミルで72時間湿式混合し、乾燥した後、100MP After iN powder, TaN powder, and Co powder was prepared, these raw material powders were blended in blending composition shown in Table 1, and 72 hours wet mixing in a ball mill, dried, 100MP
a の圧力で圧粉体にプレス成形し、この圧粉体を6P It was pressed into a green compact at a pressure of a, the green compact 6P
aの真空中、温度:1400℃に1時間保持の条件で焼結し、焼結後、切刃部分にR:0.05のホーニング加工を施してISO規格・CNMG120408のチップ形状をもったWC基超硬合金製の超硬基体A1〜A10 In vacuum of a, temperature: sintered under the conditions of 1 hour hold time at 1400 ° C., after sintering, R the cutting edge portion: with chip shape of ISO standard · CNMG120408 subjected to honing of 0.05 WC based cemented carbide made of cemented carbide substrate A1~A10
を形成した。 It was formed.

【0009】また、原料粉末として、いずれも0.5〜 [0009] In addition, as a raw material powder, 0.5 to none
2μmの平均粒径を有するTiCN(重量比でTiC/ TiCN having an average particle size of 2 [mu] m (TiC in a weight ratio /
TiN=50/50)粉末、Mo 2 C粉末、ZrC粉末、NbC粉末、TaC粉末、WC粉末、Co粉末、およびNi粉末を用意し、これら原料粉末を、表2に示される配合組成に配合し、ボールミルで24時間湿式混合し、乾燥した後、100MPaの圧力で圧粉体にプレス成形し、この圧粉体を2kPaの窒素雰囲気中、温度: TiN = 50/50) was prepared powder, Mo 2 C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder, and Ni powder, are blended raw material powders, the compounding composition shown in Table 2 , 24-hour wet mixing in a ball mill, dried, and pressed into a green compact under a pressure of 100 MPa, in a nitrogen atmosphere at 2kPa the green compact, temperature:
1500℃に1時間保持の条件で焼結し、焼結後、切刃部分にR:0.03のホーニング加工を施してISO規格・CNMG120408のチップ形状をもったTiC Sintered under the conditions of 1 hour hold time at 1500 ° C., after sintering, R the cutting edge portion: with 0.03 ISO standards · CNMG120408 tip shape is subjected to honing of TiC
N系サーメット製の超硬基体B1〜B6を形成した。 The formation of the N-based cermet made of cemented carbide substrate B1~B6.

【0010】ついで、これら超硬基体A1〜A10およびB1〜B6を、アセトン中で超音波洗浄し、乾燥した状態で、それぞれ図1に例示される通常のアークイオンプレーティング装置に装入し、一方カソード電極(蒸発源)として種々の成分組成をもったTi−Al合金を装着し、装置内を排気して0.5Paの真空に保持しながら、ヒーターで装置内を500℃に加熱した後、Arガスを装置内に導入して10PaのAr雰囲気とし、この状態で超硬基体に−800Vのバイアス電圧を印加して超硬基体表面をArガスボンバート洗浄し、ついで装置内に反応ガスとして、メタンガスおよび/または窒素ガスを導入して6Paの反応雰囲気とすると共に、前記超硬基体に印加するバイアス電圧を−200Vに下げて、 [0010] Next, these cemented carbide substrates A1~A10 and B1-B6, ultrasonic cleaning in acetone, in a dry state, was charged to a normal arc ion plating apparatus illustrated in FIG. 1, respectively, on the other hand the Ti-Al alloy having various component compositions as a cathode electrode (vapor source) is mounted, while maintaining a vacuum of 0.5Pa and evacuating the apparatus, it was heated in the apparatus to 500 ° C. by the heater , and Ar atmosphere 10Pa by introducing Ar gas into the apparatus, as a reaction gas carbide substrate surface by applying a bias voltage of -800V to the cemented carbide substrate in this state was washed Ar gas bombardment, then into the apparatus , by introducing methane gas and / or nitrogen gas with a reactive atmosphere of 6 Pa, lowering the bias voltage applied to the carbide substrate to -200 V,
前記カソード電極とアノード電極との間にアーク放電を発生させ、もって前記超硬基体A1〜A10およびB1 The cathode electrode and to generate arc discharge between the anode electrode, with it the carbide substrate A1~A10 and B1
〜B6のそれぞれの表面に、表3、4に示される目標組成および目標層厚の密着性下地被覆層および強靭性被覆層を蒸着することにより、図2(a)に概略斜視図で、 On each surface of the B6, by depositing the adhesion underlayer coating layer and tough coating layer of the target composition and target layer thicknesses shown in Tables 3 and 4, a schematic perspective view in FIG. 2 (a),
同(b)に概略縦断面図で示される形状を有する従来被覆超硬工具としての従来表面被覆超硬合金製スローアウエイチップ(以下、従来被覆超硬チップと云う)1〜2 The (b) to the conventional surface coating cemented carbide indexable as a conventional coated cemented carbide tool having a shape shown in a schematic longitudinal sectional view (hereinafter, referred to as conventional coated carbide inserts) 1-2
2をそれぞれ製造した。 2 was prepared, respectively.

【0011】ついで、これら従来被覆超硬チップ1〜2 [0011] Then, these prior coated carbide inserts 1-2
2のそれぞれの表面に、同じく図1のアークイオンプレーティング装置にて、カソード電極(蒸発源)として、 On each surface of the two, at same arc ion plating apparatus of Figure 1, as a cathode electrode (vapor source),
金属Zrを装着し、装置内を排気して1.3×10 -3 A metal Zr mounted, 1.3 × 10 -3 P by evacuating the apparatus
aの真空に保持しながら、ヒーターで装置内を620〜 While maintaining the vacuum of a, 620~ in the apparatus with a heater
720℃の範囲内の所定の温度に加熱した状態で、超硬基体に印加するパルスバイアス電圧を−350Vとし、 While heating to a predetermined temperature in the range of 720 ° C., a pulse bias voltage applied to the carbide substrate and -350 V,
ついで装置内に反応ガスとして酸素ガスを導入しながら、前記カソード電極とアノード電極との間にアーク放電を発生させ、もって表5に示される目標層厚の潤滑性被覆層を形成することにより同じく図2に示される形状をもった本発明被覆超硬工具としての本発明表面被覆超硬合金製スローアウエイチップ(以下、本発明被覆超硬チップと云う)1〜22をそれぞれ製造した。 Then while introducing oxygen gas as a reaction gas into the apparatus, again by the by generating arc discharge between the cathode electrode and the anode electrode, to form a lubricating coating layer of the target layer thicknesses shown in Table 5 with shown by the present invention a surface coating made of cemented carbide indexable as the present invention coated carbide tool having the shape in FIG. 2 (hereinafter, the present invention refers to the coating hard tip) 1 to 22 were prepared, respectively.

【0012】なお、この結果得られた各種の被覆超硬チップについて、これを構成する各種被覆層の組成および層厚を、オージェ分光分析装置および走査型電子顕微鏡を用いて測定したところ、表3〜5の目標組成および目標層厚と実質的に同じ組成および平均層厚(任意5ヶ所測定の平均値)を示した。 [0012] Note that the resulting various coated carbide inserts where the composition and thickness of the various coating layers constituting this was measured using Auger spectroscopy apparatus and a scanning electron microscope, Table 3 It showed substantially the same composition and average layer thickness and the target composition and the target layer thickness of 5 (average value of any five locations measured).

【0013】ついで、この結果得られた各種の被覆超硬チップのうち、本発明被覆超硬切削工具1〜16および従来被覆超硬切チップ1〜16について、 被削材:JIS・SUS304の丸棒、 切削速度:200m/min. [0013] Then, among the resulting various coated carbide inserts, the present invention coated cemented carbide cutting tools 1 to 16 and conventional coated carbide switching chips 1-16 Workpiece: round of JIS · SUS304 rod, cutting speed: 200m / min. 、 切り込み:1.5mm、 送り:0.25mm/rev. , Cut: 1.5mm, Feed: 0.25mm / rev. 、 切削時間:10分、の条件でのステンレス鋼の乾式連続旋削加工試験、 被削材:JIS・SUS304の長さ方向等間隔4本縦溝入り丸棒、 切削速度:130m/min. Cutting Time: dry continuous turning test stainless steel in 10 minutes, conditions, Workpiece: length equidistant four longitudinal grooves containing round bar of JIS · SUS304, Cutting speed: 130m / min. 、 切り込み:1.5mm、 送り:0.20mm/rev. , Cut: 1.5mm, Feed: 0.20mm / rev. 、 切削時間:3分、の条件でのステンレス鋼の乾式断続旋削加工試験、さらに、 被削材:JIS・S15Cの長さ方向等間隔4本縦溝入り丸棒、 切削速度:220m/min. Cutting Time: Dry intermittent turning test stainless steel in 3 minutes, conditions, further Workpiece: JIS · S15C length direction at equal intervals of four longitudinal grooves containing round bar, Cutting speed: 220 m / min. 、 切り込み:2.0mm、 送り:0.25mm/rev. , Cut: 2.0mm, Feed: 0.25mm / rev. 、 切削時間:5分、の条件での軟鋼の乾式断続旋削加工試験を行い、いずれの旋削加工試験でも切刃の逃げ面摩耗幅を測定した。 Cutting Time: perform mild dry interrupted turning test at 5 minutes, conditions were measured flank wear width of the cutting blade in either turning test.

【0014】また、本発明被覆超硬チップ17〜22および従来被覆超硬チップ17〜22については、 被削材:JIS・SUS304の丸棒、 切削速度:180m/min. Further, the present invention cover the hard tip 17 to 22 and conventional coated carbide inserts 17-22, Workpiece: round bar of JIS · SUS304, Cutting speed: 180 m / min. 、 切り込み:1.5mm、 送り:0.25mm/rev. , Cut: 1.5mm, Feed: 0.25mm / rev. 、 切削時間:10分、の条件でのステンレス鋼の乾式連続旋削加工試験、 被削材:JIS・SUS304の長さ方向等間隔4本縦溝入り丸棒、 切削速度:120m/min. Cutting Time: 10 min, dry continuous turning test under the conditions of a stainless steel, a work material: JIS · SUS304 length direction at equal intervals of four longitudinal grooves containing round bar, Cutting speed: 120 m / min. 、 切り込み:1.5mm、 送り:0.20mm/rev. , Cut: 1.5mm, Feed: 0.20mm / rev. 、 切削時間:3分、の条件でのステンレス鋼の乾式断続旋削加工試験、さらに、 被削材:JIS・S15Cの長さ方向等間隔4本縦溝入り丸棒、 切削速度:220m/min. Cutting Time: Dry intermittent turning test stainless steel in 3 minutes, conditions, further Workpiece: JIS · S15C length direction at equal intervals of four longitudinal grooves containing round bar, Cutting speed: 220 m / min. 、 切り込み:2.0mm、 送り:0.25mm/rev. , Cut: 2.0mm, Feed: 0.25mm / rev. 、 切削時間:5分、の条件での軟鋼の乾式断続旋削加工試験を行い、いずれの旋削加工試験でも切刃部の逃げ面摩耗幅を測定した。 Cutting Time: perform mild dry interrupted turning test at 5 minutes, conditions were measured flank wear width of the cutting edge in either turning test. この測定結果を表6に示した。 The measurement results are shown in Table 6.

【0015】 [0015]

【表1】 [Table 1]

【0016】 [0016]

【表2】 [Table 2]

【0017】 [0017]

【表3】 [Table 3]

【0018】 [0018]

【表4】 [Table 4]

【0019】 [0019]

【表5】 [Table 5]

【0020】 [0020]

【表6】 [Table 6]

【0021】(実施例2)原料粉末として、平均粒径: [0021] (Example 2) raw material powder, average particle diameter:
5.5μmを有する中粗粒WC粉末、同0.8μmの微粒WC粉末、同1.3μmのTaC粉末、同1.2μm Coarse WC powder in with 5.5 [mu] m, the 0.8μm of fine WC powder, TaC powder of the 1.3 .mu.m, the 1.2μm
のNbC粉末、同1.2μmのZrC粉末、同2.3μ NbC powder, the 1.2μm of ZrC powder, same 2.3μ
mのCr 32粉末、同1.5μmのVC粉末、同1.0 Cr 3 C 2 powder m, VC powder of the same 1.5 [mu] m, by 1.0
μmの(Ti,W)C粉末、同1.8μmのCo粉末、 μm of (Ti, W) C powder, Co powder of the 1.8 .mu.m,
および同1.2μmの炭素(C)粉末を用意し、これら原料粉末をそれぞれ表7に示される配合組成に配合し、 And providing a same 1.2μm carbon (C) powder were blended in blending compositions shown these raw material powders in Tables 7,
さらにワックスを加えてアセトン中で24時間ボールミル混合し、減圧乾燥した後、100MPaの圧力で所定形状の各種の圧粉体にプレス成形し、これらの圧粉体を、6Paの真空雰囲気中、7℃/分の昇温速度で13 In addition to the wax and mixed for 24 hours ball milling in acetone, dried under reduced pressure, and press-molded into various green compact of a predetermined shape at a pressure of 100 MPa, these green compacts in a vacuum atmosphere of of 6 Pa, 7 ° C. / min at a heating rate of 13
70〜1470℃の範囲内の所定の温度に昇温し、この温度に1時間保持後、炉冷の条件で焼結して、直径が8 Heated to a predetermined temperature in the range of 70-1470 ° C., after 1 hour hold time at this temperature, and sintered under the conditions of furnace cooling, diameter 8
mm、13mm、および26mmの3種の超硬基体形成用丸棒焼結体を形成し、さらに前記の3種の丸棒焼結体から、研削加工にて、表7に示される組合せで、切刃部の直径×長さがそれぞれ6mm×13mm、10mm× mm, 13 mm, and 26mm to form a three carbide substrate for forming a round rod sintered body, the further three round bar sintered body of said at grinding, in combinations shown in Table 7, diameter × length of cutting edge, each 6 mm × 13 mm, 10 mm ×
22mm、および20mm×45mmの寸法をもった超硬基体(エンドミル)a〜hをそれぞれ製造した。 22 mm, and 20 mm × 45 mm size carbide substrate (end mills) to h having produced respectively.

【0022】ついで、これらの超硬基体(エンドミル) [0022] Subsequently, these carbide substrate (end mill)
a〜hの表面に、ホーニングを施し、アセトン中で超音波洗浄し、乾燥した状態で、同じく図1に例示される通常のアークイオンプレーティング装置に装入し、上記実施例1と同一の条件で、表8に示される目標組成および目標層厚の強靭性被覆層を蒸着することにより、図3 On the surface of the to h, subjected to honing, ultrasonic cleaning in acetone, in a dry state, also charged to the normal arc ion plating apparatus illustrated in FIG. 1, the first embodiment the same as in condition, by depositing a tough coating layer of the target composition and target layer thicknesses shown in Table 8, FIG. 3
(a)に概略正面図で、同(b)に切刃部の概略横断面図で示される形状を有する従来被覆超硬工具としての従来表面被覆超硬合金製エンドミル(以下、従来被覆超硬エンドミルと云う)1〜8をそれぞれ製造した。 A schematic front view (a), the same (b) to the conventional surface coating cemented carbide end mill of the prior coating cemented carbide tool having a shape shown in a schematic cross-sectional view of the cutting edge (hereinafter, conventional coating superhard end mill and refers) 1-8 were prepared, respectively.

【0023】さらに、上記の従来被覆超硬エンドミル1 Furthermore, the above conventional coated cemented carbide end mills 1
〜8の表面に、同じくアークイオンプレーティング装置にて、上記実施例1と同一の条件で、表9に示される目標層厚の潤滑性被覆層を形成することにより同じく図3 To 8 of the surface, also by an arc ion plating apparatus, under the same conditions as in Example 1, also Figure 3 by forming a lubricating coating layer of the target layer thicknesses shown in Table 9
に示される形状をもった本発明被覆超硬工具としての本発明表面被覆超硬合金製エンドミル(以下、本発明被覆超硬エンドミルと云う)1〜8をそれぞれ製造した。 The present invention surface coating cemented carbide end mill of the present invention coated carbide tool having a shape shown in (hereinafter, the present invention refers to the coating end mills) 1-8 were prepared, respectively.

【0024】また、この結果得られた各種の被覆超硬エンドミルについて、これを構成する各種被覆層の組成および層厚を、オージェ分光分析装置および走査型電子顕微鏡を用いて測定したところ、表8、9の目標組成および目標層厚と実質的に同じ組成および平均層厚(任意5 Further, this resulting various coated cemented carbide end mills where the composition and thickness of the various coating layers constituting this was measured using Auger spectroscopy apparatus and a scanning electron microscope, Table 8 , substantially the same composition and average layer thickness and the target composition and the target layer thickness of 9 (optional 5
ヶ所測定の平均値との比較)を示した。 It shows a comparison) between the average value of the locations measured.

【0025】つぎに、上記本発明被覆超硬エンドミル1 Next, the present invention coated cemented carbide end mill 1
〜8および従来被覆超硬エンドミル1〜8のうち、本発明被覆超硬エンドミル1〜3および従来被覆超硬エンドミル1〜3については、 被削材:平面寸法:100mm×250mm、厚さ:5 8 and of the conventional coated cemented carbide end mills 1-8, the present invention cover the end mills 1-3 and the conventional coated cemented carbide end mills 1-3 Workpiece: planar dimensions: 100 mm × 250 mm, thickness: 5
0mmのJIS・SUS304の板材、 切削速度:50m/min. Plate of 0mm of JIS · SUS304, cutting speed: 50m / min. 、 溝深さ(切込み):3mm、 テーブル送り:200mm/分、 の条件でのステンレス鋼の湿式溝切削加工試験(水溶性切削油使用)、本発明被覆超硬エンドミル4〜6および従来被覆超硬エンドミル4〜6については、 被削材:平面寸法:100mm×250mm、厚さ:5 , Groove depth (infeed): 3 mm, table feed: 200 mm / min, wet groove cutting test stainless steel in the conditions (water-soluble cutting oil used), the present invention coated cemented carbide end mills 4-6 and conventional coating than hardness for end mills 4-6 workpiece: planar dimensions: 100 mm × 250 mm, thickness: 5
0mmのJIS・S15C板材、 切削速度:60m/min. 0mm of JIS · S15C plate, cutting speed: 60m / min. 、 溝深さ(切込み):6mm、 テーブル送り:400mm/分、の条件での軟鋼の乾式溝切削加工試験、本発明被覆超硬エンドミル7,8および従来被覆超硬エンドミル7,8については、 被削材:平面寸法:100mm×250mm、厚さ:5 , Groove depth (infeed): 6 mm, table feed: About mild dry groove cutting test at 400 mm / min, the conditions, the present invention coated cemented carbide end mills 7 and 8 and the conventional coated cemented carbide end mills 7 and 8, workpiece: planar dimensions: 100 mm × 250 mm, thickness: 5
0mmのJIS・SUS304の板材、 切削速度:50m/min. Plate of 0mm of JIS · SUS304, cutting speed: 50m / min. 、 溝深さ(切込み):2.0mm、 テーブル送り:200mm/分、の条件でのステンレス鋼の湿式溝切削加工試験(水溶性切削油使用)、をそれぞれ行い、いずれの溝切削加工試験でも外周刃の逃げ面摩耗量が使用寿命の目安とされる0.1mmに至るまでの切削溝長を測定した。 , Groove depth (infeed): 2.0 mm, table feed: performed 200 mm / min, wet groove cutting test stainless steel under conditions (water-soluble cutting oil used), respectively, in either the groove cutting test cutting groove length up to 0.1mm for flank wear of the peripheral cutting edge is a measure of the service life was measured. この測定結果を表8、9にそれぞれ示した。 The measurement results are shown in Tables 8 and 9.

【0026】 [0026]

【表7】 [Table 7]

【0027】 [0027]

【表8】 [Table 8]

【0028】 [0028]

【表9】 [Table 9]

【0029】(実施例3)上記の実施例2で製造した直径が8mm(超硬基体a〜c形成用)、13mm(超硬基体d〜f形成用)、および26mm(超硬基体g、h [0029] (Example 3) in diameter prepared in Example 2 above is 8 mm (for cemented carbide substrates a~c formation), 13 mm (for cemented carbide substrates d~f formation), and 26 mm (carbide substrates g, h
形成用)の3種の丸棒焼結体を用い、この3種の丸棒焼結体から、研削加工にて、溝形成部の直径×長さがそれぞれ4mm×13mm(超硬基体a'〜c')、8mm With three round bar sintered body forming), from the three round bar sintered at grinding, diameter × length respectively 4 mm × 13 mm of the groove forming portion (carbide substrates a ' ~c '), 8mm
×22mm(超硬基体d'〜f')、および16mm× × 22 mm (carbide substrates d'~f '), and 16 mm ×
45mm(超硬基体g'、h')の寸法をもった超硬基体(ドリル)a'〜h'をそれぞれ製造した。 45 mm (cemented carbide substrates g ', h') were prepared, respectively cemented carbide substrate having a size of (the drill) a'~h '.

【0030】ついで、これらの超硬基体(ドリル)a [0030] Subsequently, these carbide substrate (drill) a
'〜h'の表面に、ホーニングを施し、アセトン中で超音波洗浄し、乾燥した状態で、同じく図1に例示される通常のアークイオンプレーティング装置に装入し、上記実施例1と同一の条件で、表10に示される目標組成および目標層厚の強靭性被覆層を蒸着することにより、図4(a)に概略正面図で、同(b)に溝形成部の概略横断面図で示される形状を有する従来被覆超硬工具としての従来表面被覆超硬合金製ドリル(以下、従来被覆超硬ドリルと云う)1〜8をそれぞれ製造した。 On the surface of 'to h', subjected to honing, ultrasonic cleaning in acetone, in a dry state, it was charged to a normal arc ion plating apparatus which is also illustrated in Figure 1, identical to the first embodiment in conditions, by depositing toughness coating layer of the target composition and target layer thicknesses shown in Table 10, a schematic front view in FIG. 4 (a), a schematic cross-sectional view of the groove forming portion to the (b) in the conventional surface-coated cemented carbide drills of the conventional coated cemented carbide tool having a shape shown (hereinafter, the conventional coating called carbide drills) was 1-8 were prepared, respectively.

【0031】さらに、上記の従来被覆超硬ドリル1〜8 Furthermore, the above conventional coated cemented carbide drills 1-8
の表面に、同じくアークイオンプレーティング装置にて、上記実施例1と同一の条件で、表11に示される目標層厚の潤滑性被覆層を形成することにより、同じく図4に示される形状をもった本発明被覆超硬工具としての本発明表面被覆超硬合金製ドリル(以下、本発明被覆超硬ドリルと云う)1〜8をそれぞれ製造した。 On the surface of, likewise by an arc ion plating apparatus, under the same conditions as in Example 1, by forming a lubricating coating layer of the target layer thicknesses shown in Table 11, the shape also shown in FIG. 4 the present invention surface coating cemented carbide drill as the present invention coated carbide tool having (hereinafter, the present invention coating referred to as carbide drills) 1-8 were prepared, respectively.

【0032】さらに、この結果得られた各種の被覆超硬ドリルについて、これを構成する各種被覆層の組成および層厚を、オージェ分光分析装置および走査型電子顕微鏡を用いて測定したところ、表10、11の目標組成および目標層厚と実質的に同じ組成および平均層厚(任意5ヶ所測定の平均値との比較)を示した。 Furthermore, the coating cemented carbide drills of the resulting various, composition and thickness of the various coating layers constituting this was measured using Auger spectroscopy apparatus and a scanning electron microscope, Table 10 showed substantially the same composition and average layer thickness and the target composition and the target layer thickness of 11 (compared to the average value of any five locations measured).

【0033】つぎに、上記本発明被覆超硬ドリル1〜8 Next, the present invention coated cemented carbide drills 1-8
および従来被覆超硬ドリル1〜8のうち、本発明被覆超硬ドリル1〜3および従来被覆超硬ドリル1〜3については、 被削材:平面寸法:100mm×250厚さ:50mm And among the conventional coated cemented carbide drills 1-8, the present invention cover the carbide drill 1-3 and the conventional coated cemented carbide drills 1-3 Workpiece: planar dimensions: 100 mm × 250 thickness: 50mm
のJIS・SUS304板材、 切削速度:15m/min. Of JIS · SUS304 plate, cutting speed: 15m / min. 、 送り:0.10mm/rev、の条件でのステンレス鋼の湿式穴あけ切削加工試験、本発明被覆超硬ドリル4〜 , Feed: 0.10 mm / rev, wet drilling cutting test stainless steel in the conditions, the present invention coated cemented carbide drills 4
6および従来被覆超硬ドリル4〜6については、 被削材:平面寸法:100mm×250mm、厚さ:5 6 and the conventional coated cemented carbide drills 4-6, Workpiece: planar dimensions: 100 mm × 250 mm, thickness: 5
0mmのJIS・SUS304の板材、 切削速度:20m/min. Plate of 0mm of JIS · SUS304, cutting speed: 20m / min. 、 送り:0.15mm/rev、の条件でのステンレス鋼の湿式穴あけ切削加工試験、本発明被覆超硬ドリル7, , Feed: 0.15 mm / rev, wet drilling cutting test stainless steel in the conditions, the present invention coated cemented carbide drills 7,
8および従来被覆超硬ドリル7,8については、 被削材:平面寸法:100mm×250mm、厚さ:5 8 and for conventional coated cemented carbide drills 7 and 8, Workpiece: planar dimensions: 100 mm × 250 mm, thickness: 5
0mmのJIS・S15Cの板材、 切削速度:40m/min. Plate of 0mm of JIS · S15C, cutting speed: 40m / min. 、 送り:0.35mm/rev、の条件での軟鋼の湿式穴あけ切削加工試験、をそれぞれ行い、いずれの湿式(水溶性切削油使用)高速穴あけ切削加工試験でも先端切刃面の逃げ面摩耗幅が0.3mmに至るまでの穴あけ加工数を測定した。 , Feed: 0.35 mm / rev, deeds mild wet drilling cutting test under conditions, respectively, either a wet (water-soluble cutting oil used) Fast drilling cutting flank wear width of the end cutting surfaces in the test There was measured the drilling number of up to 0.3mm. この測定結果を表10、11にそれぞれ示した。 The measurement results are shown in Tables 10 and 11.

【0034】 [0034]

【表10】 [Table 10]

【0035】 [0035]

【表11】 [Table 11]

【0036】 [0036]

【発明の効果】表3〜11に示される結果から、本発明被覆超硬切削工具は、いずれも潤滑性被覆層としてのZ From the results shown in Table 3 to 11 according to the present invention, the present invention coated cemented carbide cutting tools are both as a lubricating coating layer Z
rO 2層によって切刃表面にすぐれた潤滑性が確保されることから、ステンレス鋼や軟鋼の切削加工で切粉が前記ZrO 2層に溶着することがなく、切刃は常にすぐれた表面潤滑性を維持することから、切刃への切粉溶着が原因のチッピングが切刃に発生することがなく、すぐれた耐摩耗性を発揮するのに対して、前記ZrO 2層の形成のない従来被覆超硬工具においては、切粉が強靭性被覆層である(Ti,Al)N層および(Ti,Al)C Since the lubricity was excellent cutting surface by and rO 2 layers is ensured, without chips of stainless steel or mild steel cutting is welded to the ZrO 2 layer, the cutting edge is always excellent surface lubricity since maintaining a, without chips welded to the cutting edge chipping caused occurs cutting, good relative to exhibit wear resistance, coating conventionally without formation of the ZrO 2 layer in cemented carbide tool, chips are tough coating layer (Ti, Al) N layer and (Ti, Al) C
N層に溶着し易く、これが原因で前記被覆層が局部的に剥がし取られることから、切刃にチッピングが発生し、 Easily welded to the N layer, which since the coating layer is locally peeled taken due chipping occurs in the cutting edge,
比較的短時間で使用寿命に至ることが明らかである。 It is clear that lead to a relatively short time service life. 上述のように、この発明の被覆超硬工具は、各種の鋼や鋳鉄などの切削加工は勿論のこと、特に粘性が高く、切粉が切刃表面に溶着し易いステンレス鋼や軟鋼などの切削加工でも切粉に対してすぐれた表面潤滑性を発揮し、汎用性のある切削性能を示すものであるから、切削加工装置のFA化並びに切削加工の省力化および省エネ化、さらに低コスト化に十分満足に対応できるものである。 As described above, the coating cemented carbide tool of the present invention, various things steel or cutting of cast iron is of course, particularly high viscosity, cutting factors such as stainless steel or mild steel welded chips are the cutting edge surface even working exhibits excellent surface lubricity against chips, but to indicate the cutting performance with versatile, FA reduction and labor saving cutting and energy saving of the cutting device, further cost reduction it is those that can respond to satisfactory.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】アークイオンプレーティング装置の概略説明図である。 1 is a schematic illustration of an arc ion plating apparatus.

【図2】(a)は被覆超硬チップの概略斜視図、(b) 2 (a) is a schematic perspective view of a coated carbide inserts, (b)
は被覆超硬チップの概略縦断面図である。 Is a schematic longitudinal sectional view of a coated carbide inserts.

【図3】(a)は被覆超硬エンドミル概略正面図、 3 (a) is coated cemented carbide end mills schematic front view,
(b)は同切刃部の概略横断面図である。 (B) is a schematic cross-sectional view of the cutting edge.

【図4】(a)は被覆超硬ドリルの概略正面図、(b) 4 (a) is a schematic front view of the coating carbide drill, (b)
は同溝形成部の概略横断面図である。 Is a schematic cross-sectional view of the groove forming portion.

フロントページの続き Fターム(参考) 3C037 AA02 CC01 CC02 CC04 CC09 CC11 FF04 FF06 3C046 FF03 FF05 FF10 FF11 FF17 FF19 FF25 FF52 4K029 AA02 AA04 BA43 BA54 BA58 BC00 BD05 CA04 CA13 DB03 DD06 EA01 FA04 Front page of the continued F-term (reference) 3C037 AA02 CC01 CC02 CC04 CC09 CC11 FF04 FF06 3C046 FF03 FF05 FF10 FF11 FF17 FF19 FF25 FF52 4K029 AA02 AA04 BA43 BA54 BA58 BC00 BD05 CA04 CA13 DB03 DD06 EA01 FA04

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 炭化タングステン基超硬合金または炭窒化チタン基サーメットで構成された工具基体の表面に、 To 1. A tungsten carbide based cemented carbide or surface of the constructed tool substrate with titanium carbonitride based cermet,
    TiとAlの複合窒化物層および複合炭窒化物層のうちの1種の単層または2種の複層からなる強靭性被覆層を0.5〜15μmの平均層厚で物理蒸着してなる表面被覆超硬合金製切削工具において、 上記強靭性被覆層の表面に、酸化ジルコニウム層からなる潤滑性被覆層を0.5〜15μmの平均層厚で物理蒸着したことを特徴とする切粉に対する表面潤滑性にすぐれた表面被覆超硬合金製切削工具。 Formed by physical vapor deposition with an average layer thickness of 0.5 to 15 m 1 kind of a single layer or two or toughness coating layer consisting of multiple layers of one of the composite nitride layer of Ti and Al and complex carbonitride layer in the surface-coated cemented carbide cutting tool, for chips, characterized in that on the surface of the toughness coating layer was physical vapor lubrication coating layer made of zirconium oxide layer with an average layer thickness of 0.5~15μm surface-coated cemented carbide cutting tool having excellent surface lubricity.
JP2001048327A 2001-02-23 2001-02-23 Surface-coated cemented carbide cutting tool having excellent surface lubricating property for chip Pending JP2002254204A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005342856A (en) * 2004-06-04 2005-12-15 Mitsubishi Materials Corp Surface coated cemented carbide cutting tool having hard coating layer exerting excellent chipping resistance on intermittent double cutting condition
JP2006075911A (en) * 2004-09-07 2006-03-23 Mitsubishi Materials Corp Method of manufacturing surface coated cemented carbide cutting tool with surface coating layer exhibiting excellent wear resistance and chipping resistance in high-speed cutting
JP2006075912A (en) * 2004-09-07 2006-03-23 Mitsubishi Materials Corp Method of manufacturing surface coated cemented carbide cutting tool with surface coating layer exhibiting excellent wear resistance and chipping resistance in high-speed cutting of high hardness steel
JP2010082741A (en) * 2008-09-30 2010-04-15 Sumitomo Electric Hardmetal Corp Surface coated cutting tool
JP2011088263A (en) * 2009-10-26 2011-05-06 Allied Material Corp Method for manufacturing metal bond wheel and tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005342856A (en) * 2004-06-04 2005-12-15 Mitsubishi Materials Corp Surface coated cemented carbide cutting tool having hard coating layer exerting excellent chipping resistance on intermittent double cutting condition
JP2006075911A (en) * 2004-09-07 2006-03-23 Mitsubishi Materials Corp Method of manufacturing surface coated cemented carbide cutting tool with surface coating layer exhibiting excellent wear resistance and chipping resistance in high-speed cutting
JP2006075912A (en) * 2004-09-07 2006-03-23 Mitsubishi Materials Corp Method of manufacturing surface coated cemented carbide cutting tool with surface coating layer exhibiting excellent wear resistance and chipping resistance in high-speed cutting of high hardness steel
JP4535255B2 (en) * 2004-09-07 2010-09-01 三菱マテリアル株式会社 Method for manufacturing a surface-coated cemented carbide cutting tools which exhibits high speed cutting excellent surface coating layer wear resistance and chipping resistance of hardened steels
JP4535254B2 (en) * 2004-09-07 2010-09-01 三菱マテリアル株式会社 Method for manufacturing a surface-coated cemented carbide cutting tool exhibits a surface coating layer has excellent wear resistance and chipping resistance in high speed cutting
JP2010082741A (en) * 2008-09-30 2010-04-15 Sumitomo Electric Hardmetal Corp Surface coated cutting tool
JP2011088263A (en) * 2009-10-26 2011-05-06 Allied Material Corp Method for manufacturing metal bond wheel and tool

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