JPS61223182A - Cutting tool made of surface-coated tungsten carbide sintered hard alloy - Google Patents
Cutting tool made of surface-coated tungsten carbide sintered hard alloyInfo
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- JPS61223182A JPS61223182A JP6513985A JP6513985A JPS61223182A JP S61223182 A JPS61223182 A JP S61223182A JP 6513985 A JP6513985 A JP 6513985A JP 6513985 A JP6513985 A JP 6513985A JP S61223182 A JPS61223182 A JP S61223182A
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、炭化タングステン（以下ＷＣで示す）超超
硬合金母材の表面に、硬質被覆層をきわめて高い付着強
度で被覆してなる表面被覆ＷＣＣ超超硬合金製切削工具
関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a surface formed by coating a hard coating layer with extremely high adhesion strength on the surface of a tungsten carbide (hereinafter referred to as WC) cemented carbide base material. The present invention relates to a cutting tool made of coated WCC cemented carbide.
（従来の技術）
従来、ＷＣＣ超超硬合金母材表面に、
炭化チタン（以下ＴｉＣで示す）からなる平均層厚：１
〜１０μｍの内層と、
炭酸化チタン（以下Ｔｉ Ｃｏで示す）、炭窒酸化チタ
ン（以下Ｔｉ ＣＮＯで示す）、および酸化アルミニウ
ム（以下Ａ１２０ｇ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平均層厚＝０．５〜１０μｍの
外層、
で構成された硬質被覆層を２〜２０μｍの平均層厚で被
覆してなる表面被覆ＷＣ基超硬合金製切削工具が実用に
供されている。(Prior art) Conventionally, an average layer thickness of titanium carbide (hereinafter referred to as TiC) on the surface of a WCC cemented carbide base material: 1
~10 μm inner layer, and a single layer or two or more of titanium carbonate (hereinafter referred to as TiCo), titanium carbonitride oxide (hereinafter referred to as TiCNO), and aluminum oxide (hereinafter referred to as A120g). A cutting tool made of a surface-coated WC-based cemented carbide has been put into practical use by coating an outer layer with an average layer thickness of 0.5 to 10 μm and a hard coating layer with an average layer thickness of 2 to 20 μm. It is provided.
しかし、上記の従来表面波ｖｉｗｃ基超硬合金製切削工
具を、特に送りが０．４ｍ／ 「ｅＶ、以上の高送り切
削や、切削速度が２５０ ｍ／ｓｉｎ以上の高速切削に
用いた場合、前記ＴｉＣからなる内層のＷＣＣ超超硬合
金母材対する付着強度が十分でないために硬質被覆層に
剥離が生じ易（、比較的短時間で使用寿命に至るもので
あった。However, when the above-mentioned conventional surface wave VIWC-based cemented carbide cutting tool is used for high-feed cutting with a feed rate of 0.4 m/eV or more or high-speed cutting with a cutting speed of 250 m/sin or more, Because the adhesion strength of the inner layer made of TiC to the WCC cemented carbide base material was not sufficient, the hard coating layer was likely to peel off (and the service life was reached in a relatively short period of time).
〔問題点を解決するための手段〕 □−そこで、
本発明者等は、上述のような観点から、上記の従来表面
被覆ＷＣＭ超硬合金製切削工具において、内層としての
ＴｉＣ層のＷＣＣ超超硬合金母材対する付着強度を高め
て、硬質被覆層の剥離を抑制すべく研究を行なった結果
、
ＷＣＣ超超硬合金母材表面に、まず、ＣＯ：ｏ、 ｏｉ
〜１０重量％およびＷ：０．０１〜２５重量％を含有し
、残りがＴｉＣからなる組成の下方下地層を被覆し、
ついで、Ａｌ２Ｏ３からなる上方下地層を被覆した状態
で、
ＴｉＣからなる内層と、Ｔｉ Ｃｏ、Ｔｉ ＣＮＯ。[Means to solve the problem] □-So,
From the above-mentioned viewpoints, the present inventors have developed the conventional surface-coated WCM cemented carbide cutting tool by increasing the adhesion strength of the TiC layer as an inner layer to the WCC cemented carbide base material, thereby creating a hard coating layer. As a result of research to suppress the peeling of CO:o, oi on the surface of the WCC cemented carbide base material
~10% by weight and W: 0.01 to 25% by weight, with the remainder being TiC. Then, with the upper base layer made of Al2O3 covered, an inner layer made of TiC is coated. and Ti Co, Ti CNO.
およびＡｔ２０３のうちの１種の単層または２種以上の
複層からなる外層を被覆すると、前記下方下地層は、Ｃ
ｏおよびＷの含有によってｗｃ基超超硬合金母材強固に
付着し、かつ前記上方下地層は、ＷＣＣ超超硬合金母材
よび前記下方下地層中に含有するＣＯおよびＷの前記内
層への拡散防止層として作用するほか、前記下方下地層
と前記内層に対して強固に付着することがら、この結果
の表面波Ｖ＊ＷＣ基超硬合金においては、硬質被覆層全
体が前記下方下地層および上方下地層によってＷＣＣ超
超硬合金母材強固に付着し、かつ前記内層および外層に
よってすぐれた耐摩耗性が確保されるようになり、した
がって、これを特に高送り切削や高速切削に切削工具と
して使用しても硬質被覆層に剥離が発生せず、著しく長
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。When coated with an outer layer consisting of a single layer or a multilayer of two or more of At203 and At203, the lower base layer is C
O and W are contained in the WCC cemented carbide base material to firmly adhere to the WCC cemented carbide base material, and the upper base layer has a structure in which CO and W contained in the WCC cemented carbide base material and the lower base layer are bonded to the inner layer. In addition to acting as a diffusion prevention layer, it also firmly adheres to the lower base layer and the inner layer, so in the resulting surface-wave V*WC-based cemented carbide, the entire hard coating layer is bonded to the lower base layer and the inner layer. The upper base layer ensures strong adhesion to the WCC cemented carbide base material, and the inner and outer layers ensure excellent wear resistance, making it suitable for use as a cutting tool, especially for high-feed cutting and high-speed cutting. They found that the hard coating layer does not peel off even when used, and that it exhibits excellent cutting performance over an extremely 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、
ＷＣＣ超超硬合金母材表面に、重量％（以下％は重量％
を示す）で、
Ｃｏ ： ０．０１〜１０％およびＷ：０．０１〜２
５％を含有し、残りがＴｉＣからなる平均層厚：０．２
〜３μｍの下方下地層と、
Ａｆｆｉ２０３からなる平均層厚：０．２〜３μｍの上
方下地層と、
ＴｉＣからなる平均層厚：１〜１０μｍの内層と、
Ｔｉ Ｃｏ、Ｔｉ ＣＮＯ，およびＡｌ２Ｏ３のうちの
１種の単層または２種以上の複層からなる平均層厚＝０
．５〜１０ｉｍの外層、
で構成された硬質被覆層を２〜２０μｍの平均層厚で被
覆してなる表面被覆ＷＣＭ超硬合金製切削工具に特徴を
有するものである。This invention was made based on the above knowledge, and the present invention was made based on the above knowledge, and the present invention is based on the above-mentioned findings.
), Co: 0.01-10% and W: 0.01-2
Average layer thickness: 0.2
A lower base layer of ~3 μm, an upper base layer of Affi203 with an average layer thickness of 0.2 to 3 μm, an inner layer of TiC with an average layer thickness of 1 to 10 μm, and one of TiCo, TiCNO, and Al2O3. Average layer thickness consisting of one type of single layer or two or more types of multilayer = 0
．． The surface-coated WCM cemented carbide cutting tool is characterized by being coated with a hard coating layer having an average layer thickness of 2 to 20 μm and having an outer layer of 5 to 10 μm.
つぎに、この発明の切削工具において、下方下地層のＣ
ＯおよびＷの含有Ｇ１並びに各層の平均層厚を上記の通
りに限定した理由を説明する。Next, in the cutting tool of the present invention, C of the lower base layer is
The reason why the content G1 of O and W and the average layer thickness of each layer are limited as described above will be explained.
（ａ）下方下地層のＣＯおよびＷ含有量その含有量が、
ＣＧ ： ０．０１％未満およびＷ：０．０１％未満
では所望の母材に対する付着強度が得られず、一方、Ｃ
ｏ：１０％およびＷ：２５％をそれぞれ越えて含有する
と、耐摩耗性の低下が著しくなることから、その含有層
を、それぞれＣｏ ： ０．０１〜１０％、Ｗ：０
．０１〜２５％と定めた。(a) CO and W content in the lower base layer;
If CG: less than 0.01% and W: less than 0.01%, the desired adhesive strength to the base material cannot be obtained;
If the content exceeds Co: 10% and W: 25%, the wear resistance will decrease significantly, so the containing layer should be made of Co: 0.01 to 10% and W: 0.
．． It was set at 01 to 25%.
（ｂ）下方下地層の平均層厚
上記のように下方下地層には、硬質被覆層をＷＣＮ超硬
合金母材に強固に付着させる作用があるが、反面耐摩耗
性の低いものであるので、強固な付着強度が確保できれ
ば、できるだけ薄い方が望ましい。したがって、所望の
強固な付着強度を確保できる最小平均層厚が０．２μｍ
であり、−万両摩耗性に悪影響が現われる最大平均層厚
が３μｍであることから、その平均層厚を０．２〜３μ
ｍと定めた。(b) Average layer thickness of the lower base layer As mentioned above, the lower base layer has the effect of firmly adhering the hard coating layer to the WCN cemented carbide base material, but on the other hand, it has low wear resistance. As long as strong adhesion strength can be ensured, it is desirable that the film be as thin as possible. Therefore, the minimum average layer thickness that can ensure the desired strong adhesion strength is 0.2 μm.
Since the maximum average layer thickness at which an adverse effect on wear resistance appears is 3 μm, the average layer thickness is set to 0.2 to 3 μm.
It was determined as m.
（ｃ）上方下地層の平均層厚
上方下地層には、上記のようにＴｉＣからなる自重へ下
方下地層およびＷＣ基超超合金母材中のＧＯおよびＷが
拡散して、前記内層の耐摩耗性が低下するのを防止する
拡散防止層としての作用があるほか、上方下地層および
内層と強固に付着する作用があるが、その平均層厚が０
．２μｍ未満では所望の拡散防止効果が得られず、一方
この拡散防止効果は３μｍまでの平均層厚で十分で、こ
れより厚い平均層厚になると靭性が低下するようになる
ことから、その平均層厚を０．２〜３μｍと定めた。(c) Average layer thickness of the upper underlayer As mentioned above, GO and W in the lower underlayer and the WC-based superalloy base material diffuse into the upper underlayer due to its own weight made of TiC, and the inner layer has a In addition to acting as a diffusion prevention layer that prevents abrasion from decreasing, it also has the effect of firmly adhering to the upper base layer and inner layer, but the average layer thickness is 0.
．． If the thickness is less than 2 μm, the desired diffusion prevention effect cannot be obtained; on the other hand, an average layer thickness of up to 3 μm is sufficient for this diffusion prevention effect, and if the average layer thickness is thicker than this, the toughness will decrease. The thickness was determined to be 0.2 to 3 μm.
（ｄ）内層の平均層厚
ａ ＴｉＣからなる内層には、耐摩耗性を著
しく向上させる作用があるが、その平均層厚が１μｍ未
満では所望のすぐれた耐摩耗性を確保することができず
、一方１０μｍを越えた平均層厚にすると、硬質被覆層
全体の靭性が低下するようになることから、その平均層
厚を１〜１０μｍと定めた。(d) Average layer thickness a of the inner layer The inner layer made of TiC has the effect of significantly improving wear resistance, but if the average layer thickness is less than 1 μm, the desired excellent wear resistance cannot be achieved. On the other hand, if the average layer thickness exceeds 10 μm, the toughness of the entire hard coating layer decreases, so the average layer thickness was set at 1 to 10 μm.
（ｅ）外層の平均層厚
外層には、耐摩耗性、特に切刃の耐すくい面摩耗を向上
させる作用があるが、その平均層厚が０．５μｍ未満で
は前記作用に所望の効果が得られず、一方１０μｍを越
えた平均Ｎ厚にすると、内層同様に靭性が低下するよう
になることから、その平均層厚を０．５〜１０μｍと定
めた。(e) Average layer thickness of the outer layer The outer layer has the effect of improving wear resistance, especially rake face wear resistance of the cutting edge, but if the average layer thickness is less than 0.5 μm, the desired effect cannot be achieved. On the other hand, if the average N thickness exceeds 10 μm, the toughness will decrease similarly to the inner layer, so the average layer thickness was set at 0.5 to 10 μm.
（ｆ）硬質被覆層の平均層厚
上記の４種の層によって構成される硬質被覆層において
は、その平均層厚が２μｍ未満になると、上記の自艦お
よび外層の平均層厚がこの発明の範囲を外れて薄くなる
場合が生じるようになって、所望のすぐれた耐摩耗性を
確保することができなくなり、一方その平均層厚が２０
μｍを越えると、切削工具全体の靭性が低下するように
なることから、その平均ＰＡ厚を２〜２０μｍと定めた
。(f) Average layer thickness of hard coating layer In the hard coating layer composed of the above four types of layers, if the average layer thickness is less than 2 μm, the above average layer thickness of the own ship and the outer layer falls within the scope of this invention. As a result, it becomes impossible to secure the desired excellent wear resistance, and on the other hand, when the average layer thickness is 20
If it exceeds μm, the toughness of the entire cutting tool decreases, so the average PA thickness was set at 2 to 20 μm.
なお、上記の下方下地層は、通常の化学蒸着法によりＴ
ｉ ＣＰＪを形成するに際して、１０００℃前後の反応
温度に昇温する過程の雰囲気（多くの場合、水素雰囲気
）中に２容石％以上のＣＨ４を含有させ、反応温度に昇
温後、ＴｉＣＪｉを形成する反応ガス組成とすることに
よって形成することができる。Note that the lower base layer mentioned above is coated with T by the usual chemical vapor deposition method.
i When forming CPJ, 2% or more of CH4 is contained in the atmosphere (in most cases, a hydrogen atmosphere) during the process of raising the temperature to a reaction temperature of around 1000 °C, and after raising the temperature to the reaction temperature, TiCJi is added. It can be formed by adjusting the reaction gas composition to be formed.
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。Next, the cutting tool of the present invention will be specifically explained using examples.
ＣＯ：６％、ＴｉＣ：２％、ＴａＣ：５％を含有し、残
りがＷＣと不可避不純物からなる組成、並びにＣＩＳ規
格ＳＮＭＧ４３２の形状をもったＷＣＣ超超硬合金母材
以下母材′１という）、およびＣＯ：５％、ＴｉＣ：５
％、ＴａＣ：５％を含有し、残りがＷＣと不可避不純物
からなる組成、並びに前記母材１と同一形状をもったＷ
ＣＣ超超硬合金母材以下母材２という）を用意し、これ
ら母材の表面に、通常の化学蒸着法にて、反応ガスとし
て、Ｔｉ Ｃ１４、Ｈ２、ＣＨ４、Ｎ２ ｔ−Ｃ０ｚ
、およびＡＩ Ｃ１３を用い、これら反応ガスを適宜組
合せて、
反応温度：１０００℃。A WCC cemented carbide base material with a composition containing 6% CO, 2% TiC, 5% TaC, with the remainder being WC and unavoidable impurities, and a shape according to CIS standard SNMG432. ), and CO: 5%, TiC: 5
%, TaC: 5%, the remainder is WC and unavoidable impurities, and W has the same shape as the base material 1.
A CC cemented carbide base material (hereinafter referred to as base material 2) is prepared, and TiC14, H2, CH4, N2 t-C0z as a reaction gas is applied to the surface of these base materials by a normal chemical vapor deposition method.
, and AI C13, these reaction gases were appropriately combined, and the reaction temperature was 1000°C.
炉内圧カニ５００厘Ｈａ。Furnace pressure 500 liters Ha.
の条件で、それぞれ第１表に示される組成および平均層
厚をもった本発明表面被覆ＷＣＣ超超硬合金製切削工具
以下本発明切削工具という）１〜６および従来表面液ｍ
ｗｃ基超硬合金製切削工具（以下従来切削工具という）
１〜６をそれぞれ製造した。Under the conditions, the present invention surface-coated WCC cemented carbide cutting tools 1 to 6 (hereinafter referred to as the present invention cutting tools) having the compositions and average layer thicknesses shown in Table 1, respectively, and the conventional surface liquid m
WC-based cemented carbide cutting tools (hereinafter referred to as conventional cutting tools)
1 to 6 were produced respectively.
なお、本発明切削工具１〜６の下方下地層形成にあたっ
ては、その前段階である昇温時の水素雰囲気中に同じく
第１表に示される量のＣＨ４を含有させ、このＣＨ４の
含有量の違いによって下方下地層におけるＣＯおよびＷ
の含有量の調整をはかった。In addition, in forming the lower base layer of the cutting tools 1 to 6 of the present invention, CH4 is added in the amount shown in Table 1 in the hydrogen atmosphere at the time of heating, which is the preliminary step, and the CH4 content is reduced. CO and W in the lower substratum due to differences
We tried to adjust the content of
ついで、この結果得られた本発明切削工具１〜６および
従来切削工具１〜６について、被削材：ＳＮ０Ｍ４３９
（硬さ：ＨＢ ２７０）。Next, regarding the cutting tools 1 to 6 of the present invention and the conventional cutting tools 1 to 6 obtained as a result, the work material: SN0M439
(Hardness: HB 270).
切削速度：１３０ｍ／鵬ｉ−１ 送り： ０．７ａｍ ／ ｒｅＶ、 。Cutting speed: 130m/Peng i-1 Sending: 0.7am/reV.
切込み：２ａｍ。Depth of cut: 2am.
切削時間＝２０分。Cutting time = 20 minutes.
の条件（以下切削条件１という）での乾式高送り切削試
験、並びに、
被削材：Ｆｅ１２（硬さ：Ｈｅ’１４０）。Dry high-feed cutting test under conditions (hereinafter referred to as cutting conditions 1), and Work material: Fe12 (hardness: He'140).
切削速度：２７０ｍ／ｍｉｓ。Cutting speed: 270m/mis.
′＃８２表 送り：０．３履／ ｒｅＶ、 。'#82 table Feed: 0.3 shoes/reV.
切込み：２履。Notch: 2 shoes.
切削時ｆｉｌ：２０分。Cutting fil: 20 minutes.
の条件（以下切削条件２という）での乾式高速切削試験
を行ない、それぞれ切刃の逃げ面摩耗幅とすくい面摩耗
深さを測定した。これらの測定結果を第２表に合せて示
した。A dry high-speed cutting test was conducted under the following conditions (hereinafter referred to as cutting conditions 2), and the flank wear width and rake face wear depth of the cutting edge were measured. These measurement results are also shown in Table 2.
第２表に示される結果から、本発明切削工具１〜６は、
いずれも高送り切削および高速切削において、硬質被覆
層に剥離の発生がなく、すぐれた耐摩耗性を示すのに対
して、従来切削工具１〜６においては、いずれも切刃に
欠けが発生し、比較的短かい時間で使用寿命に到り、実
用に供するには問題のあることが明らかである。From the results shown in Table 2, cutting tools 1 to 6 of the present invention are as follows:
All of them show excellent wear resistance with no peeling of the hard coating layer during high-feed cutting and high-speed cutting, whereas conventional cutting tools 1 to 6 all have chipping on the cutting edge. , it is clear that the service life is reached in a relatively short period of time, and that there is a problem in putting it into practical use.
上述のように、この発明の表面被覆ＷＣＣ超超硬合金製
切削工具、下方および上方下地層の介在によって、高送
り切削や高速切削に用いても硬質被覆層に剥離が全く発
生せず、すぐれた切削性能を長期に亘って発揮するので
ある。As mentioned above, the surface-coated WCC cemented carbide cutting tool of the present invention, with the presence of the lower and upper base layers, does not cause any peeling of the hard coating layer even when used in high-feed cutting or high-speed cutting, resulting in excellent performance. It provides excellent cutting performance over a long period of time.
Claims (1)
０１〜１０重量％およびＷ：０．０１〜２５重量％を含
有し、残りが炭化チタンからなる平均層厚：０．２〜３
μｍの下方下地層と、酸化アルミニウムからなる平均層
厚：０．２〜３μｍの上方下地層と、 炭化チタンからなる平均層厚：１〜１０μｍの内層と、 炭酸化チタン、炭窒酸化チタン、および酸化アルミニウ
ムのうちの１種の単層または２種以上の複層からなる平
均層厚：０．５〜１０μｍの外層、で構成された硬質被
覆層を２〜２０μｍの平均層厚で被覆してなる表面被覆
炭化タングステン基超硬合金製切削工具。[Claims] Co:0.
01 to 10% by weight and W: 0.01 to 25% by weight, with the remainder being titanium carbide Average layer thickness: 0.2 to 3
A lower base layer of μm, an upper base layer of aluminum oxide with an average thickness of 0.2 to 3 μm, an inner layer of titanium carbide with an average thickness of 1 to 10 μm, titanium carbonate, titanium carbonitride, and an outer layer with an average layer thickness of 0.5 to 10 μm and an average layer thickness of 2 to 20 μm. A cutting tool made of surface-coated tungsten carbide-based cemented carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6513985A JPS61223182A (en) | 1985-03-29 | 1985-03-29 | Cutting tool made of surface-coated tungsten carbide sintered hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6513985A JPS61223182A (en) | 1985-03-29 | 1985-03-29 | Cutting tool made of surface-coated tungsten carbide sintered hard alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61223182A true JPS61223182A (en) | 1986-10-03 |
| JPS644589B2 JPS644589B2 (en) | 1989-01-26 |
Family
ID=13278253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6513985A Granted JPS61223182A (en) | 1985-03-29 | 1985-03-29 | Cutting tool made of surface-coated tungsten carbide sintered hard alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61223182A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04141392A (en) * | 1990-09-28 | 1992-05-14 | Kobe Steel Ltd | Work tool protecting device for industrial robot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832734A (en) * | 1971-09-01 | 1973-05-02 | ||
| GB1394108A (en) * | 1971-11-12 | 1975-05-14 | Sandco Ltd | Coated hard metal body |
| JPS54103409A (en) * | 1978-02-01 | 1979-08-14 | Sumitomo Electric Industries | Surface coated superhard alloy member |
| JPS55154562A (en) * | 1979-05-18 | 1980-12-02 | Sumitomo Electric Ind Ltd | Sintered hard alloy part for base material of surface-covered tool material and their manufacture |
| JPS5867861A (en) * | 1981-09-11 | 1983-04-22 | イスカ−・リミテツド | Sintered hard metal product |
-
1985
- 1985-03-29 JP JP6513985A patent/JPS61223182A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832734A (en) * | 1971-09-01 | 1973-05-02 | ||
| GB1394108A (en) * | 1971-11-12 | 1975-05-14 | Sandco Ltd | Coated hard metal body |
| JPS54103409A (en) * | 1978-02-01 | 1979-08-14 | Sumitomo Electric Industries | Surface coated superhard alloy member |
| JPS55154562A (en) * | 1979-05-18 | 1980-12-02 | Sumitomo Electric Ind Ltd | Sintered hard alloy part for base material of surface-covered tool material and their manufacture |
| JPS5867861A (en) * | 1981-09-11 | 1983-04-22 | イスカ−・リミテツド | Sintered hard metal product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS644589B2 (en) | 1989-01-26 |
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