JP3309507B2 - Surface-coated cubic boron nitride containing group ceramic cutting tool having adhesion to the hard coating layer has excellent - Google Patents

Surface-coated cubic boron nitride containing group ceramic cutting tool having adhesion to the hard coating layer has excellent

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Publication number
JP3309507B2
JP3309507B2 JP18748493A JP18748493A JP3309507B2 JP 3309507 B2 JP3309507 B2 JP 3309507B2 JP 18748493 A JP18748493 A JP 18748493A JP 18748493 A JP18748493 A JP 18748493A JP 3309507 B2 JP3309507 B2 JP 3309507B2
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surface
cutting tool
boron nitride
coating layer
cubic boron
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JP18748493A
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JPH0718415A (en )
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文洋 植田
逸郎 田嶋
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三菱マテリアル株式会社
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/53After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete
    • C04B41/5315Cleaning compositions, e.g. for removing hardened cement from ceramic tiles

Description

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

【0001】 [0001]

【産業上の利用分野】この発明は、硬質被覆層の立方晶窒化ほう素(以下、cBNで示す)基セラミックス基体に対する密着性にすぐれた表面被覆cBN基セラミックス製切削工具に関するものである。 BACKGROUND OF THE INVENTION This invention, cubic boron nitride of the hard coating layer (hereinafter, indicated by cBN) relates the surface coated cBN-based ceramic cutting tool having excellent adhesion to a base ceramic base.

【0002】 [0002]

【従来の技術】従来、例えば特開昭59−8679号公報や特開平1−96083号公報などに記載されるように、TiCやTiN、あるいはTiCN、さらにAl 2 Conventionally, as described in, for example, JP 59-8679 and JP 1-96083 discloses, TiC and TiN, or TiCN, further Al 2
3やWC,TiB 2などで構成されたセラミックス結合相が20〜50容量%を占め、残りが実質的にcBN O 3 and WC, TiB ceramic binding phase, which is constituted by a 2 accounts for 20 to 50 volume%, the remainder substantially cBN
分散相からなる組成を有するcBN基セラミックス基体の表面に、物理蒸着法や化学蒸着法を用い、Tiの炭化物、窒化物、炭窒化物、炭酸化物、および炭窒酸化物、 On the surface of the cBN-based ceramic substrate having a composition consisting of dispersed phase, using a physical vapor deposition method or chemical vapor deposition, carbides Ti, nitrides, carbo-nitrides, carbonates and oxycarbonitride,
並びに酸化アルミニウム(以下、それぞれTiC,Ti And aluminum oxide (hereinafter, TiC respectively, Ti
N,TiCN,TiCO,TiCNO、およびAl 2 N, TiCN, TiCO, TiCNO, and Al 2 O
3で示す)のうちの1種の単層または2種以上の複層からなる硬質被覆層を5〜20μmの平均層厚で形成してなる表面被覆cBN基セラミックス製切削工具が知られており、これが、例えば高硬度焼入鋼や鋳鉄などの切削加工に用いられていることも知られている。 3 shows) is one of a single layer or two or more surface covering cBN-based ceramic cutting tool of the hard coating layer obtained by forming an average layer thickness of 5~20μm consisting multilayered known of this is, for example, is also known that are used in cutting such as high hardness hardened steel and cast iron.

【0003】 [0003]

【発明が解決しようとする課題】一方、近年の切削加工は省力化の面から高速化の傾向にあるが、上記の従来表面被覆cBN基セラミックス製切削工具を用いて、例えば高硬度焼入鋼を切削加工する場合、通常切削速度が2 THE INVENTION Problems to be Solved On the other hand, although recent cutting tends to speed in terms of labor saving, using the above conventional surface-coated cBN-based ceramic cutting tools, such as high hardness quenched steel when cutting a normal cutting speed 2
00m/min.程度までの切削速度では問題はないが、これを越えて400m/min.程度まで高速になると、硬質被覆層に剥離が発生し易くなり、これが原因で比較的短時間で使用寿命に至るのが現状である。 There is no problem in cutting speeds of up to 00m / min. Approximately, at a high speed until 400 meters / min. About Beyond this, peeling hard layer is likely to occur, this is a relatively short time service life due the leads to is the status quo.

【0004】 [0004]

【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、上記の従来表面被覆cBN基セラミックス製切削工具に着目し、これを構成する硬質被覆層の基体表面に対する密着性向上をはかるべく研究を行なった結果、基体表面に対するイオンエッチング処理で、cBN分散相をそのまま残留させ、セラミックス結合相だけを除去することができることを見出し、したがって基体表面を、最表面から所定深さに亘ってセラミックス結合相だけを除去した状態、すなわち残留したcB From the viewpoint as described above, results view of the above-described conventional surface-coated cBN-based ceramic cutting tools were subjected to the study achieve adhesion improvement to the substrate surface of the hard coat layer constituting this ion etching of the substrate surface in the process, cBN dispersed phase as it is the residue, found that it is possible to remove only the ceramic binding phase, thus the substrate surface, while removing only the ceramic binding phase over from the outermost surface to a predetermined depth, i.e. the residual cB
N分散相によって粗面化した状態とすることができ、この状態の基体表面に、物理蒸着法あるいは化学蒸着法を用い、通常の条件で硬質被覆層を形成すると、前記硬質被覆層は前記基体表面に対してきわめて強固に密着するようになることから、この結果の表面被覆cBN基セラミックス製切削工具は、例えばこれを高硬度焼入鋼の切削速度が400m/min.程度の高速切削に用いた場合にも前記硬質被覆層に剥離の発生なく、長期に亘ってすぐれた切削性能を発揮するという研究結果を得たのである。 Can be a state of being roughened by N dispersed phase, the substrate surface in this state, using a physical vapor deposition or chemical vapor deposition, to form a hard layer under normal conditions, the hard layer is the substrate use because it becomes very firmly adhered to the surface, the surface coating cBN-based ceramic cutting tool of this result, for example, which in high-speed cutting cutting speed 400 meters / min. about the high hardness quenched steel no occurrence of peeling in the hard coating layer even if you were, it was obtained a finding that exhibits superior cutting performance over a long period of time.

【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、20〜50容量%のセラミックス結合相と、残部のcBN分散相からなる組成を有し、 [0005] This invention was made based on the above findings, a 20-50 volume% of ceramic binder phase, with balance of cBN dispersed phase,
かつイオンエッチング処理で上記セラミックス結合相が最表面から0.5〜5μmの深さに亘って除去され、残留したcBN分散相によって粗面化された基体の表面に、TiC,TiN,TiCN,TiCO,TiCN And the ceramic binding phase ion etching process is removed over a depth of 0.5~5μm from the outermost surface, the surface of the roughened substrate by residual cBN dispersed phase, TiC, TiN, TiCN, TiCO , TiCN
O、およびAl 23のうちの1種の単層または2種以上の複層からなる硬質被覆層を5〜20μmの平均層厚で蒸着形成してなる、硬質被覆層がすぐれた密着性を有する表面被覆cBN基セラミックス製切削工具に特徴を有するものである。 O, and Al 2 O formed by vapor deposited with an average layer thickness of 5~20μm a hard layer made of one single layer or a multi layer of two or more types of the three, adhesion to a hard coating layer has excellent those characterized by a surface coating cBN-based ceramic cutting tool having a.

【0006】なお、この発明の切削工具において、これを構成する基体のセラミックス結合相の含有量を20〜 [0006] Incidentally, in the cutting tool of the present invention, 20 to the content of the ceramic binder phase of the substrate to configure this
50容量%と限定したのは、その含有量が20容量%未満では所望の強度を確保することができず、一方その含有量が50容量%を越えると、基体の耐摩耗性が低下するようになるばかりでなく、cBN分散相の割合が相対的に少なくなりすぎて、イオンエッチング処理後の面粗さのピッチが大きくなりすぎ、これに形成される硬質被覆層に所望のすぐれた密着性を確保することができなくなるという理由によるものであり、またセラミックス結合相の除去深さを0.5〜5μmとしたのは、その深さが0.5μm未満では、硬質被覆層に所望のすぐれた密着性を確保することができず、一方その深さが5μmを越えると、基体表面が粗面となりすぎ、この粗面はこれに形成される硬質被覆層の平滑性を損ない、切刃に欠損やチッピングが発生 The reason for limiting the 50 volume%, the content is less than 20 volume% can not be ensured desired strength, whereas when the content exceeds 50 volume%, so that the wear resistance of the substrate is reduced to not only the proportion of cBN dispersed phase becomes too relatively small, the pitch of the surface roughness after the ion etching process becomes too large, the desired good adhesion to the hard coating layer formed thereto is due because can not be ensured, also had a 0.5~5μm the removal depth of the ceramic binder phase, in a depth of less than 0.5 [mu] m, the desired excellent hard coating layer was not possible to secure adhesion, whereas if it exceeds it 5μm its depth, too and the substrate surface is rough, the rough surface impairs the smoothness of the hard coating layer formed thereto, the cutting edge loss or chipping occurs る原因になるという理由によるものであり、さらにこれの除去深さに関連して、原料粉末として使用されるcBNは、その粒度が平均粒径で0. That is due to reasons that cause, further in conjunction with removal depth of this, cBN used as raw material powder, 0 the granularity in average particle size.
5〜3μmであるのが望ましい。 And it is desirable 5~3μm. また、この発明の切削工具において、これを構成する硬質被覆層の平均層厚を5〜20μmと限定したのは、その平均層厚が5μm未満では所望のすぐれた耐摩耗性を長期に亘って保持することができず、一方その平均層厚が20μmを越えると、切刃に欠損やチッピング(微小欠け)が発生し易くなるという理由にもとづくものである。 Further, in the cutting tool of the present invention, which from the mean layer thickness of the hard coating layer that constitutes the limiting and 5~20μm, the the average layer thickness is less than 5μm for a long time the desired excellent wear resistance It can not be maintained, whereas when the average layer thickness exceeds 20 [mu] m, are based on the reason that defects and chipping in the cutting edge (small chipping) tends to occur.

【0007】 [0007]

【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。 EXAMPLES Next is a more detailed description of the cutting tool embodiments of the present invention. 基体として、それぞれ表1に示される組成を有し、かつTPGA322のスローアウェイチップ形状をもったcBN基セラミックス基体を用意し、 Substrate as has a composition that respectively shown in Table 1, and prepared cBN-based ceramic base having a throw away tip shape of TPGA322,
これに通常のイオンシンニング装置を用い、通常の条件でイオンエッチング処理を施して、同じく表1に示される深さでセラミックス結合相を除去した後、物理蒸着装置を用い、通常の条件で同じく表1に示される組成および平均層厚の硬質被覆層を形成することにより本発明表面被覆cBN基セラミックス製切削工具(以下、本発明被覆切削工具という)1〜6をそれぞれ製造した。 This using conventional ion thinning device, it is subjected to ion etching treatment under normal conditions, after removal of the ceramic binder phase at same depths as shown in Table 1, using a physical vapor deposition system, also table under normal conditions the present invention surface coating cBN-based ceramic cutting tool by forming the composition and average layer thickness hard layer of shown in 1 (hereinafter, the present invention coated as cutting tools) 1-6 were prepared, respectively. また、比較の目的で、上記基体表面に対するイオンエッチング処理を行なわない以外は同一の条件で従来表面被覆cBN基セラミックス製切削工具(以下、従来被覆切削工具という)1〜6をそれぞれ製造した。 For the purpose of comparison, but for the ion etching process for the substrate surface prior surface coating cBN-based ceramic cutting tool under the same conditions (hereinafter, the conventional coating of cutting tools) was 1-6 were prepared, respectively.

【0008】ついで、この結果得られた各種の被覆切削工具について、 被削材:SCM415(硬さ:H R C65)の丸棒、 切削速度:400m/min.、 切込み:0.2mm、 送り:0.1mm/rev.、 切削時間:30分、 の条件で高硬度焼入鋼の乾式連続高速切削試験を行ない、切刃の逃げ面摩耗幅を測定した。 [0008] Next, the results obtained various coated cutting tool, work material: SCM415 (hardness: H R C65) round bar, Cutting speed:. 400 meters / min, cut: 0.2 mm, Feed: . 0.1 mm / rev, cutting time: 30 minutes, in conditions subjected to dry continuous high-speed cutting test of the high-hardness hardened steel was measured flank wear width of the cutting edge. これらの測定結果を表2に示した。 These measurement results are shown in Table 2.

【0009】 [0009]

【表1】 [Table 1]

【0010】 [0010]

【表2】 [Table 2]

【0011】 [0011]

【発明の効果】表1,2に示される結果から、本発明被覆切削工具1〜6は、いずれも硬質被覆層の基体表面に対する密着性にすぐれているので、高硬度焼入鋼の高速切削でも硬質被覆層に剥離の発生なく、すぐれた耐摩耗性を示すのに対して、従来被覆切削工具1〜6は、いずれも硬質被覆層の基体表面に対する密着性が不十分であるために、切削加工開始後比較的短時間で硬質被覆層に剥離が発生し、これが原因で使用寿命に至ることが明らかである。 From the results shown in Tables 1 and 2 according to the present invention, the present invention coated cutting tool 1 to 6, since both are excellent in adhesion to the substrate surface of the hard coating layer, high-speed cutting of high-hardness hardened steel But without the occurrence of peeling in the hard coating layer, whereas exhibit excellent abrasion resistance, the conventional coated cutting tools 1 to 6, for both adhesion to the substrate surface of the hard coating layer is insufficient, cutting start after a relatively short period of time with a release hard coating layer occurred, it is apparent that lead to service life due. 上述のように、この発明の表面被覆cBN基セラミックス製切削工具は、通常の切削速度(例えば高硬度焼入鋼の場合は200m/min.、鋳鉄の場合は40 As described above, the surface-coated cBN-based ceramic cutting tool of this invention, if in the case of normal cutting speed (e.g., high hardness quenched steel 200 meters / min., The cast iron 40
0m/min.)では勿論のこと、上記のように高速切削(例えば鋳鉄の場合は600m/min.程度)でも硬質被覆層に剥離の発生なく、すぐれた切削性能を長期に亘って発揮し、切削加工の高速化に十分対応することができるものである。 0 m / min.) In the course of it, in the case of high-speed cutting (e.g. cast iron as described above 600 meters / min. About) even without the occurrence of peeling in the hard coating layer, exhibits over superior cutting performance for long-term, the speed of cutting in which can be accommodated sufficiently.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−142769(JP,A) 特開 平4−283005(JP,A) 特開 平3−146663(JP,A) 特開 昭61−183187(JP,A) (58)調査した分野(Int.Cl. 7 ,DB名) C23C 14/00 - 14/58 B23P 15/28 ────────────────────────────────────────────────── ─── front page of the continuation (56) reference Patent Sho 62-142769 (JP, a) JP flat 4-283005 (JP, a) JP flat 3-146663 (JP, a) JP Akira 61- 183187 (JP, a) (58 ) investigated the field (Int.Cl. 7, DB name) C23C 14/00 - 14/58 B23P 15/28

Claims (1)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 20〜50容量%のセラミックス結合相と、残部の立方晶窒化ほう素分散相からなる組成を有し、かつイオンエッチング処理で上記セラミックス結合相が最表面から0.5〜5μmの深さに亘って除去され、残留した立方晶窒化ほう素分散相によって粗面化された基体の表面に、Tiの炭化物、窒化物、炭窒化物、 And 1. A 20 to 50 volume% of the ceramic binder phase has a composition consisting of cubic boron nitride dispersed phase of balance, and the ceramic binding phase ion etching process from the outermost surface 0.5~5μm the removed over a depth, on the surface of the substrate which is roughened by cubic boron nitride dispersed phase remaining, carbides Ti, nitrides, carbonitrides,
    炭酸化物、および炭窒酸化物、並びに酸化アルミニウムのうちの1種の単層または2種以上の複層からなる硬質被覆層を5〜20μmの平均層厚で蒸着形成してなる硬質被覆層がすぐれた密着性を有する表面被覆立方晶窒化ほう素基セラミックス製切削工具。 Carbonates, and oxycarbonitride, and one single-layer or hard coat layer formed by depositing form two or more hard layer formed of multiple layers with an average layer thickness of 5~20μm of aluminum oxide law surface-coated cubic nitride have excellent adhesion containing group ceramic cutting tool.
JP18748493A 1993-06-30 1993-06-30 Surface-coated cubic boron nitride containing group ceramic cutting tool having adhesion to the hard coating layer has excellent Expired - Lifetime JP3309507B2 (en)

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DE69519341T2 (en) * 1994-08-01 2001-03-15 Sumitomo Electric Industries About Hard composite material for tools
US5948541A (en) * 1996-04-04 1999-09-07 Kennametal Inc. Boron and nitrogen containing coating and method for making
US5976716A (en) * 1996-04-04 1999-11-02 Kennametal Inc. Substrate with a superhard coating containing boron and nitrogen and method of making the same
US6593015B1 (en) 1999-11-18 2003-07-15 Kennametal Pc Inc. Tool with a hard coating containing an aluminum-nitrogen compound and a boron-nitrogen compound and method of making the same
JP3637883B2 (en) 2000-08-31 2005-04-13 住友電気工業株式会社 Surface-coated boron nitride sintered body tool
JP3637882B2 (en) 2000-08-31 2005-04-13 住友電気工業株式会社 Surface-coated boron nitride sintered body tool
US6962751B2 (en) 2001-06-13 2005-11-08 Sumitomo Electric Industries, Ltd. Amorphous carbon coated tools and method of producing the same
US6881475B2 (en) 2001-06-13 2005-04-19 Sumitomo Electric Industries, Ltd Amorphous carbon coated tool and fabrication method thereof
JP5125646B2 (en) 2008-03-19 2013-01-23 株式会社タンガロイ Cubic boron nitride sintered body tool
JP5663807B2 (en) * 2010-10-29 2015-02-04 住友電工ハードメタル株式会社 Cubic boron nitride sintered body tool
CN103459071B (en) 2012-04-03 2015-09-30 住友电工硬质合金株式会社 Cubic boron nitride sintered body tool
JP5879664B2 (en) * 2013-12-26 2016-03-08 住友電工ハードメタル株式会社 Cutting tools
JP6343161B2 (en) * 2014-03-28 2018-06-13 山陽特殊製鋼株式会社 Centrifugal atomization powder production disks

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