JP2016027192A - 積層型硬質皮膜および切削工具 - Google Patents
積層型硬質皮膜および切削工具 Download PDFInfo
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Abstract
【解決手段】異なる層Aと層Bが積層されてなる積層型硬質皮膜であって、上記層Aが、(MaAlbCrcTad)(BxCyNz)からなり、
0≦a≦0.35、0.05≦d≦0.35
0≦x≦0.15、0≦y≦0.50
a+b+c+d=1、x+y+z=1
の関係を満足すると共に、上記層Bが、(TiαSiβ)(BxCyNz)からなり、
0.05≦β≦0.35
0≦x≦0.15、0≦y≦0.50
α+β=1、x+y+z=1
の関係を満足し、これらが夫々1層以上交互に積層したものであることを特徴とする。
【選択図】なし
Description
組成の異なる層Aと層Bが積層されてなる積層型硬質皮膜であって、
上記層Aが、
(MaAlbCrcTad)(BxCyNz)からなり、
0≦a≦0.35、0.05≦d≦0.35
0≦x≦0.15、0≦y≦0.50
a+b+c+d=1、x+y+z=1
但し、Mは、V、Nb、MoおよびWよりなる群から選択される少なくとも1種であり、a、b、cおよびdは、夫々M、Al、CrおよびTaの原子比、x、yおよびzは、夫々B、CおよびNの原子比を示す。
の関係を満足すると共に、
上記層Bが、
(TiαSiβ)(BxCyNz)からなり、
0.05≦β≦0.35
0≦x≦0.15、0≦y≦0.50
α+β=1、x+y+z=1
但し、αおよびβは、夫々TiおよびSiの原子比、x、yおよびzは、夫々B、CおよびNの原子比を示す。
の関係を満足し、これらが夫々1層以上交互に積層したものであることを特徴とする。
0≦a≦0.35、0.05≦d≦0.35
0≦x≦0.15、0≦y≦0.50
a+b+c+d=1、x+y+z=1
但し、Mは、V、Nb、MoおよびWよりなる群から選択される少なくとも1種であり、a、b、cおよびdは、夫々M、Al、CrおよびTaの原子比、x、yおよびzは、夫々B、CおよびNの原子比を示す。
0.05≦β≦0.3
0≦x≦0.15、0≦y≦0.50
α+β=1、x+y+z=1
但し、αおよびβは、夫々TiおよびSiの原子比、x、yおよびzは、夫々B、CおよびNの原子比を示す。
してもよい。
全圧力:0.5Pa以上、4Pa以下
印加電流(放電電流):100〜200A
成膜時の基材温度:300℃以上、800℃以下
下記表1に示す組成の層A、層Bを積層した皮膜を、複数の蒸発源を有するAIP装置にて形成した。このとき基材として、硬さ測定用に、13mm×13mm×5mm厚さの鏡面超硬合金製試験片、および耐摩耗性の測定用に、直径:8.5mmの超硬合金製2枚刃ドリルを用いた。
前記硬さ測定用試験片を用いて、ビッカース硬さ(HV)を荷重1Nの条件で測定した。具体的な基準として、硬さがHV3400以上のものは硬度が十分にあると判定した。尚、硬さは好ましくはHV3700以上、より好ましくはHV3800以上である。硬さは大きい方が良いため、特に上限は定めないがあまり大きすぎると、皮膜内部での破壊につながるため、その上限はHV4700以下であることが好ましい。より好ましくはHV4600以下である。
耐摩耗性に関しては、上記超硬合金製2枚刃ドリルに成膜したサンプルを用いて、下記の条件で切削試験を行ない、ドリル外周面のフランク摩耗幅、即ち逃げ面摩耗幅を測定して耐摩耗性を評価した。具体的な基準として、逃げ面摩耗幅が69μm以下のものを耐摩耗性に優れると評価した。尚、逃げ面摩耗幅は好ましくは64μm以下であり、より好ましくは59μm以下であり、更に好ましくは54μm以下であり、より更に好ましくは49μm以下である。
被削材料:SCM440(機械構造用合金鋼鋼材:JIS G 4053:2003
熱処理する前の状態のもの(生材))
切削速度:75m/分
送り:0.24mm/回転
切り込み深さ:2mm
潤滑:外部給油(エマルジョン)
評価条件:1000穴加工後のドリル外周面でのフランク摩耗幅で評価
前記表1の試験No.4に示した組成および構造の皮膜を、最初に100nmの層Aを形成しない以外は、サンプル毎に層Aおよび層Bの厚さを変えつつ積層数を変え、合計厚さを3μmの一定として硬質皮膜を形成した。このときの製造方法は、実施例1に示した方法と同様である。尚、試験No.37では、合計厚さを3.2μm、即ち3200nmとした。
Claims (5)
- 組成の異なる層Aと層Bが積層されてなる積層型硬質皮膜であって、
上記層Aが、
(MaAlbCrcTad)(BxCyNz)からなり、
0≦a≦0.35、0.05≦d≦0.35
0≦x≦0.15、0≦y≦0.50
a+b+c+d=1、x+y+z=1
但し、Mは、V、Nb、MoおよびWよりなる群から選択される少なくとも1種であり、a、b、cおよびdは、夫々M、Al、CrおよびTaの原子比、x、yおよびzは、夫々B、CおよびNの原子比を示す。
の関係を満足すると共に、
上記層Bが、
(TiαSiβ)(BxCyNz)からなり、
0.05≦β≦0.35
0≦x≦0.15、0≦y≦0.50
α+β=1、x+y+z=1
但し、αおよびβは、夫々TiおよびSiの原子比、x、yおよびzは、夫々B、CおよびNの原子比を示す。
の関係を満足し、これらが夫々1層以上交互に積層したものであることを特徴とする積層型硬質皮膜。 - 前記層Aおよび層Bの厚みが、夫々1.5nm以上である請求項1に記載の積層型硬質皮膜。
- 前記層Aおよび層Bの厚みが、夫々100nm以下であり、積層数が複数である請求項1または2に記載の積層型硬質皮膜。
- 請求項1〜3のいずれかに記載の積層型硬質皮膜を基材表面に形成した切削工具。
- 前記基材が、炭化タングステン基超硬合金、サーメット合金、高速度工具鋼、合金工具鋼のいずれかからなるものである請求項4に記載の切削工具。
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EP15811208.6A EP3162911A4 (en) | 2014-06-24 | 2015-06-23 | Laminated hard film and cutting tool |
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JP2019098471A (ja) * | 2017-12-04 | 2019-06-24 | 三菱マテリアル株式会社 | 表面被覆切削工具 |
JP2022168833A (ja) * | 2021-04-26 | 2022-11-08 | ユニオンツール株式会社 | 切削工具用硬質皮膜 |
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CN107747092B (zh) * | 2017-10-10 | 2019-08-23 | 岭南师范学院 | 一种耐高温硬质复合涂层及其制备方法和涂层刀具 |
GB201802468D0 (en) * | 2018-02-15 | 2018-04-04 | Rolls Royce Plc | Coated substrate |
CN112840062B (zh) * | 2018-08-01 | 2022-11-04 | Osg株式会社 | 硬质被膜和硬质被膜被覆构件 |
DE112018007875T5 (de) * | 2018-08-01 | 2021-04-22 | Osg Corporation | Hartbeschichtung und mit Hartbeschichtung bedecktes Element |
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