JP2590316B2 - Surface coated cemented carbide cutting tool - Google Patents
Surface coated cemented carbide cutting toolInfo
- Publication number
- JP2590316B2 JP2590316B2 JP11407886A JP11407886A JP2590316B2 JP 2590316 B2 JP2590316 B2 JP 2590316B2 JP 11407886 A JP11407886 A JP 11407886A JP 11407886 A JP11407886 A JP 11407886A JP 2590316 B2 JP2590316 B2 JP 2590316B2
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- cutting
- cutting tool
- coating layer
- coated cemented
- 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.)
- Expired - Fee Related
Links
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、基体の表面に、きわめて硬質な被覆層を
形成することによって耐摩耗性の著しい向上をはかった
表面被覆超硬合金製切削工具に関するものである。Description: BACKGROUND OF THE INVENTION The present invention relates to a cutting tool made of a surface-coated cemented carbide in which an extremely hard coating layer is formed on the surface of a substrate, thereby significantly improving wear resistance. It is about.
一般に、炭化タングステン（以下WCで示す）基超硬合
金基体の表面に、炭化チタン（以下TiCで示す）、窒化
チタン（以下TiNで示す）、および炭窒化チタン（以下T
iCN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形成してなる表面被覆超硬合金製
切削工具が広く実用に供されている。Generally, on a surface of a tungsten carbide (hereinafter referred to as WC) -based cemented carbide substrate, titanium carbide (hereinafter referred to as TiC), titanium nitride (hereinafter referred to as TiN), and titanium carbonitride (hereinafter referred to as T
(indicated by iCN), a cutting tool made of a surface-coated cemented carbide formed by forming a hard coating layer composed of one kind of single layer or two or more kinds of multiple layers is widely used in practice.
しかし、上記の従来表面被覆超硬合金製切削工具にお
いては、これを構成する硬質被覆層が、TiCでビッカー
ス硬さ（Hv）:3000、TiNでHv:2500、さらにTiCNでHv:27
00の比較的低い硬さしかもたないものであるため、実用
に際しては満足な耐摩耗性を示さず、比較的短時間で使
用寿命に至るものであった。However, in the above-mentioned conventional surface-coated hard metal cutting tool, the hard coating layer constituting the cutting tool is composed of Vickers hardness (Hv): 3000 for TiC, 2500 for TiN, and 2500 for TiCN.
Since it had a relatively low hardness of 00, it did not exhibit satisfactory abrasion resistance in practical use, and reached a service life in a relatively short time.
そこで、本発明者等は、上述のような観点から、より
硬質な被覆層を開発すべく研究を行なった結果、WC基超
硬合金基体の表面に、TiとZrとHfの３成分複合炭化物、
３成分複合窒化物、および３成分複合炭窒化物（以下、
それぞれ、（Ti,Zr,Hf）C,（Ti,Zr,Hf）Ｎ、および（T
i,Zr,Hf）CNで示す）のうちの１種の単層または２種以
上の複層からなる被覆層を形成してやると、この被覆層
は、（Ti,Zr,Hf）ＣでHv:3400以上、（Ti,Zr,Hf）ＮでH
v:2900以上、（Ti,Zr,Hf）CNでHv:3200以上の著しく高
い硬さをもつことから、この結果の表面被覆超硬合金製
切削工具は、すぐれた耐摩耗性を示すようになり、長期
に亘ってすぐれた切削性能を発揮するという知見を得た
のである。In view of the above, the present inventors have conducted research to develop a harder coating layer. As a result, the surface of the WC-based cemented carbide substrate has a three-component composite carbide of Ti, Zr and Hf. ,
Three-component composite nitride and three-component composite carbonitride (hereinafter, referred to as
(Ti, Zr, Hf) C, (Ti, Zr, Hf) N and (T
i, Zr, Hf) represented by CN), a coating layer consisting of a single layer or a multilayer of two or more layers is formed by (Ti, Zr, Hf) C and Hv: 3400 or more, H at (Ti, Zr, Hf) N
v: 2900 or more, (Ti, Zr, Hf) CN has a remarkably high hardness of 3200 or more, so the resulting surface-coated cemented carbide cutting tool shows excellent wear resistance. In other words, they have found that they exhibit excellent cutting performance over a long period of time.
この発明は、上記知見にもとづいてなされたものであ
って、WC基超硬合金で構成された基体の表面に、（Ti,Z
r,Hf）Ｃ、（Ti,Zr,Hf）Ｎ、および（Ti,Zr,Hf）CN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0.5〜10μｍの層厚で形成してなる耐摩耗性のすぐ
れた表面被覆超硬合金製切削工具に特徴を有するもので
ある。The present invention has been made on the basis of the above-described findings, and has a structure in which (Ti, Z
a hard coating layer composed of a single layer of at least one of (r, Hf) C, (Ti, Zr, Hf) N, and (Ti, Zr, Hf) CN or a multilayer of at least two layers of 0.5 to 10 μm; The present invention is characterized by a surface-coated cemented carbide cutting tool formed with a thickness and having excellent wear resistance.
なお、この発明の表面被覆超硬合金製切削工具におい
て、硬質被覆層の層厚を0.5〜10μｍと限定したのは、
その層厚が0.5μｍ未満では所望の耐摩耗性向上効果が
得られず、一方その層厚が10μｍを越えると耐摩耗性が
劣化するようになるとい理由にもとづくものである。In the cutting tool made of a surface-coated cemented carbide according to the present invention, the thickness of the hard coating layer is limited to 0.5 to 10 μm.
If the layer thickness is less than 0.5 μm, the desired effect of improving wear resistance will not be obtained, while if the layer thickness exceeds 10 μm, the wear resistance will be deteriorated.
つぎに、この発明の表面被覆超硬合金製切削工具を実
施例により具体的に説明する。Next, a cutting tool made of a surface-coated cemented carbide according to the present invention will be specifically described with reference to examples.
実施例１ 基体として、重量％で、WC-8％CO-8％TiC-9％TaCから
なる組成を有するWC基超硬合金で構成され、かつJIS・S
NG432に即した形状を有する切削チップを用意し、この
基体を公知のイオンプレーティング装置内に装入し、ま
たこの装置内に置かれたるつぼにはTiとZrとHfの固溶体
を入れ、この状態でまず装置内の真空度を５×10-3mmHg
の雰囲気として、基体に−1000Vの電荷をかけて、これ
を十分に洗浄し、加熱した後、Arを脱気し、代りにN2お
よびC2H2（アセチレン）のうちのいずれか一方、あるい
は両方を200cc/minの割合で流して、前記基体の表面
に、それぞれ第１表に示される組成並びに層厚の単層ま
たは複層からなる硬質被覆層を形成することによって、
本発明表面被覆超硬合金製切削工具（以下、本発明被覆
切削チップという）１〜７をそれぞれ製造した。Example 1 As a substrate, a WC-based cemented carbide having a composition of WC-8% CO-8% TiC-9% TaC by weight, and JIS / S
A cutting tip having a shape conforming to NG432 was prepared, this substrate was placed in a known ion plating apparatus, and a crucible placed in this apparatus was filled with a solid solution of Ti, Zr and Hf. In the state, first, the degree of vacuum in the device is 5 × 10 -3 mmHg
As an atmosphere, a charge of −1000 V is applied to the substrate, and the substrate is sufficiently washed and heated. After degassing Ar, one of N 2 and C 2 H 2 (acetylene) is used instead. Alternatively, by flowing both at a rate of 200 cc / min, a hard coating layer composed of a single layer or a multilayer having the composition and the layer thickness shown in Table 1 is formed on the surface of the substrate,
Cutting tools made of the surface-coated cemented carbide of the present invention (hereinafter, referred to as the coated cutting tips of the present invention) 1 to 7 were manufactured.
また、比較の目的で、イオンプレーティング装置のる
つぼ内に装入されるTiとZrとHfの固溶体に代って、Tiを
装入する以外は同様な操作条件で、同じく第１表に示さ
れる組成並びに層厚の単層または複層からなる硬質被覆
層を形成することによって、従来表面被覆超硬合金製切
削工具（以下、従来被覆切削チップという）１〜５をそ
れぞれ製造した。For the purpose of comparison, Table 1 also shows the same operating conditions except that Ti was charged instead of the solid solution of Ti, Zr, and Hf charged in the crucible of the ion plating apparatus. By forming a hard coating layer composed of a single layer or a multiple layer having the same composition and layer thickness, cutting tools made of a conventional surface-coated cemented carbide (hereinafter referred to as conventional coated cutting tips) 1 to 5 were manufactured, respectively.
ついで、これらの被覆切削チップについて、硬質被覆
層の硬さ（ビッカース硬さ）を測定すると共に、 被削材:SNCM439（硬さ：HB250）の丸棒、 切削速度:170m/min.、 送り:0.3mm/rev.、 切込み:2/mm 切削時間:20min.、 の条件での鋼の連続切削試験、並びに、 被削材:SNCM439（硬さ：HB300）の角材、 切削速度:150m/min.、 送り:0.3mm/rev.、 切込み:3mm、 切削時間:3min.、 の条件での鋼の断続切削試験を行ない、前者の連続切削
試験では、切刃の逃げ面摩耗幅とすくい面摩耗深さを測
定し、また後者の断続切削試験では10個の切刃のうちの
欠損発生切刃数を測定した。これらの測定結果を第２表
に示した。Then, for these coated cutting chips, as well as measuring the hardness of the hard coating layer (Vickers hardness), Workpiece: SNCM439 (Hardness: H B 250) round bar, Cutting speed: 170m / min,. feed: 0.3 mm / rev, cut:. 2 / mm cutting time:. 20min continuous cutting test of steel, with, conditions and, workpiece: SNCM439 (hardness: H B 300) square bar of cutting speed: 150m / min., Feed: 0.3mm / rev., Depth of cut: 3mm, cutting time: 3min., Intermittent cutting test of steel.In the former continuous cutting test, the flank wear width of the cutting edge and The wear depth of the rake face was measured, and in the latter intermittent cutting test, the number of chipped cutting edges out of 10 cutting edges was measured. Table 2 shows the measurement results.
第1,2表に示される結果から、本発明被覆切削チップ
１〜７においては、いずれも硬質被覆層が従来被覆切削
チップ１〜５のそれに比して著しく高い硬さをもってい
るので、連続切削では従来被覆切削チップ１〜５に比し
てすぐれた耐摩 耗性を示すことが明らかであり、また本発明被覆切削チ
ップ１〜７は、いずれも硬質被覆層の形成にもかかわら
ず、断続切削では従来被覆切削チップ１〜５と同等のす
ぐれた耐衝撃性を示すのである。From the results shown in Tables 1 and 2, in the coated cutting tips 1 to 7 of the present invention, since the hard coating layer has a significantly higher hardness than that of the conventional coated cutting tips 1 to 5, Has better wear resistance than conventional coated cutting tips 1-5 It is evident that the coated cutting tips 1 to 7 of the present invention have excellent impact resistance equivalent to that of the conventional coated cutting tips 1 to 5 in intermittent cutting, despite the formation of a hard coating layer. It shows the nature.
上述のように、この発明の表面被覆超硬合金製切削工
具は、その表面が従来硬質被覆層に比して一段と高い硬
さをもった硬質被覆層で被覆されているので、実用に際
してすぐれた耐摩耗性を示し、長期に亘ってすぐれた切
削性能を発揮するのである。As described above, the surface-coated cemented carbide cutting tool of the present invention is excellent in practical use because its surface is coated with a hard coating layer having a higher hardness than the conventional hard coating layer. It exhibits wear resistance and exhibits excellent cutting performance over a long period.
Claims (1)
に、TiとZrとHfの３成分複合炭化物、３成分複合窒化
物、および３成分複合炭窒化物のうちの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、0.5〜10μｍ
の層厚で形成してなる耐摩耗性のすぐれた表面被覆超硬
合金製切削工具。1. A single layer of one of a ternary composite carbide of Ti, Zr and Hf, a ternary composite nitride, and a ternary composite carbonitride on a surface of a tungsten carbide-based cemented carbide substrate. Hard coating layer consisting of multiple layers of at least 0.5 to 10 μm
Cutting tool made of cemented carbide with excellent wear resistance and formed with a layer thickness of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11407886A JP2590316B2 (en) | 1986-05-19 | 1986-05-19 | Surface coated cemented carbide cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11407886A JP2590316B2 (en) | 1986-05-19 | 1986-05-19 | Surface coated cemented carbide cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62270764A JPS62270764A (en) | 1987-11-25 |
| JP2590316B2 true JP2590316B2 (en) | 1997-03-12 |
Family
ID=14628503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11407886A Expired - Fee Related JP2590316B2 (en) | 1986-05-19 | 1986-05-19 | Surface coated cemented carbide cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2590316B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075181A (en) * | 1989-05-05 | 1991-12-24 | Kennametal Inc. | High hardness/high compressive stress multilayer coated tool |
| US5266388A (en) * | 1990-09-17 | 1993-11-30 | Kennametal Inc. | Binder enriched coated cutting tool |
| US5232318A (en) * | 1990-09-17 | 1993-08-03 | Kennametal Inc. | Coated cutting tools |
| US5325747A (en) * | 1990-09-17 | 1994-07-05 | Kennametal Inc. | Method of machining using coated cutting tools |
| US5250367A (en) * | 1990-09-17 | 1993-10-05 | Kennametal Inc. | Binder enriched CVD and PVD coated cutting tool |
| EP0549584B1 (en) * | 1990-09-17 | 1998-07-22 | Kennametal Inc. | Cvd and pvd coated cutting tools |
| JP2016128196A (en) * | 2015-01-09 | 2016-07-14 | 三菱マテリアル株式会社 | Seat with hard coating |
-
1986
- 1986-05-19 JP JP11407886A patent/JP2590316B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62270764A (en) | 1987-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |