JPH09262705A - Surface coated tungsten carbide group super hard alloy cutting tool having excellent toughness in hard coating layer thereof - Google Patents
Surface coated tungsten carbide group super hard alloy cutting tool having excellent toughness in hard coating layer thereofInfo
- Publication number
- JPH09262705A JPH09262705A JP7414196A JP7414196A JPH09262705A JP H09262705 A JPH09262705 A JP H09262705A JP 7414196 A JP7414196 A JP 7414196A JP 7414196 A JP7414196 A JP 7414196A JP H09262705 A JPH09262705 A JP H09262705A
- Authority
- JP
- Japan
- Prior art keywords
- hard coating
- layer
- coating layer
- cutting tool
- tungsten carbide
- 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.)
- Pending
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、硬質被覆層がす
ぐれた靭性を有し、したがって連続切削は勿論のこと、
断続切削での高速切削や重切削においても、切刃に欠け
やチッピング（微小欠け）などの発生なく、長期に亘っ
てすぐれた切削性能を発揮する表面被覆炭化タングステ
ン基超硬合金製切削工具（以下、被覆超硬切削工具とい
う）に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a hard coating layer having excellent toughness.
A cutting tool made of surface-coated tungsten carbide based cemented carbide that exhibits excellent cutting performance over a long period of time without causing chipping or chipping (fine chipping) in the cutting edge even during high-speed cutting or heavy cutting in interrupted cutting ( Hereinafter, referred to as coated carbide cutting tool).
【０００２】[0002]
【従来の技術】従来、例えば特公昭５７−１５８５号公
報や特公昭５９−５２７０３号公報に記載されるよう
に、炭化タングステン基超硬合金基体（以下、超硬基体
という）の表面に、化学蒸着法や物理蒸着法を用い、Ｔ
ｉの炭化物、窒化物、炭窒化物、炭酸化物、窒酸化物、
および炭窒酸化物（以下、それぞれＴｉＣ，ＴｉＮ，Ｔ
ｉＣＮ，ＴｉＣＯ，ＴｉＮＯ、およびＴｉＣＮＯで示
す）、並びに酸化アルミニウム（以下、Ａｌ2 Ｏ3 で示
す）のうちの２種以上の複層で構成された硬質被覆層を
３〜３０μｍの平均層厚で形成してなる被覆超硬切削工
具が知られている。また、これら被覆超硬切削工具が、
主に合金鋼や鋳鉄などの連続切削や断続切削に用いられ
ることも良く知られるところである。2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Publication No. 57-1585 and Japanese Patent Publication No. 59-52703, a chemical treatment is performed on the surface of a tungsten carbide based cemented carbide substrate (hereinafter referred to as cemented carbide substrate). Using vapor deposition or physical vapor deposition, T
i carbides, nitrides, carbonitrides, carbonates, oxynitrides,
And oxycarbonitride (hereinafter, respectively TiC, TiN, T
iCN, TiCO, TiNO, and TiCNO) and aluminum oxide (hereinafter referred to as Al 2 O 3 ), a hard coating layer composed of two or more multi-layers with an average layer thickness of 3 to 30 μm. A coated carbide cutting tool formed is known. In addition, these coated carbide cutting tools,
It is well known that it is mainly used for continuous cutting and interrupted cutting of alloy steel and cast iron.
【０００３】[0003]
【発明が解決しようとする課題】一方、近年の切削機械
の高性能化および高出力化はめざましく、切削加工の省
力化と相まって、切削加工は高速化および重切削化の傾
向にあるが、上記の従来被覆超硬切削工具は、特に断続
切削で、これを高速切削や、高送りおよび高切込みの重
切削に用いた場合には、硬質被覆層の靭性不足が原因
で、切刃に欠けやチッピングが発生し易く、比較的短時
間で使用寿命に至るのが現状である。On the other hand, in recent years, cutting machines have been remarkably improved in performance and output, and in combination with labor saving in cutting, the cutting tends to be speeded up and heavy cut. The conventional coated carbide cutting tool of is especially intermittent cutting, and when it is used for high-speed cutting or heavy cutting with high feed and high depth of cut, due to insufficient toughness of the hard coating layer At present, chipping is likely to occur and the service life is reached in a relatively short time.
【０００４】[0004]
【課題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、上記の従来被覆超硬切削工具に
着目し、特にこれの硬質被覆層の靭性向上をはかるべく
研究を行なった結果、超硬基体を、重量％で（以下、％
は重量％を示す）、 Ｃｏ：４〜１０％、 Ｃｒ：０．２〜１％、 を含有し、残りが炭化タングステン（以下、ＷＣで示
す）と不可避不純物からなる組成を有するＷＣ基超硬合
金で構成すると共に、硬質被覆層における少なくとも第
１層を粒状結晶組織を有するＴｉＮ、第２層を縦長成長
結晶組織を有するＴｉＣＮで構成した上で、これに、例
えば３５torrの水素雰囲気中、１０５０℃に１時間保持
の条件で加熱処理を施すと、前記超硬基体を構成する、
主としてＣｒ，Ｗ、およびＣｏが前記第１層および第２
層に容易に拡散し、これを構成するＴｉＣおよびＴｉＣ
Ｎと反応して固溶体を形成するようになり、この状態
で、さらに必要に応じて、第３層以降を、いずれも粒状
結晶組織を有するＴｉＣ，ＴｉＣＯ，ＴｉＮＯ、および
ＴｉＣＮＯ、並びに望ましくはカッパー（Ｋ）型結晶組
織、あるいはＫ型結晶を主体とし、残りがアルファ
（α）型結晶からなる混合組織を有するＡｌ2 Ｏ3 のう
ちの１種または２種以上で構成してなる被覆超硬切削工
具においては、上記硬質被覆層が、これを構成する上記
第１層および第２層によって著しくすぐれ靭性をもつよ
うになり、特に高靭性が要求される断続切削を高速で行
なっても、さらに高送り高切込みなどの重切削条件で行
なっても切刃に欠けやチッピングの発生なく、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。Means for Solving the Problems Accordingly, the present inventors have
From the above-mentioned viewpoint, as a result of paying attention to the above-mentioned conventional coated carbide cutting tool, and particularly conducting research to improve the toughness of the hard coated layer thereof, the cemented carbide substrate is expressed in weight% (hereinafter,%
Indicates the weight%), Co: 4 to 10%, Cr: 0.2 to 1%, and the balance is tungsten carbide (hereinafter referred to as WC) and inevitable impurities. At least the first layer of the hard coating layer is made of TiN having a granular crystal structure, and the second layer is made of TiCN having a vertically elongated crystal structure, and further, in a hydrogen atmosphere of, for example, 35 torr, 1050 When the heat treatment is carried out under the condition of being kept at 0 ° C. for 1 hour, the cemented carbide substrate is constituted,
Mainly Cr, W, and Co are contained in the first layer and the second layer.
TiC and TiC that easily diffuse into and constitute the layer
The solid solution reacts with N to form a solid solution. In this state, if necessary, the third and subsequent layers are TiC, TiCO, TiNO, and TiCNO each having a granular crystal structure, and preferably kappa ( K) type crystal structure, or coated carbide cutting mainly composed of K type crystal and one or more kinds of Al 2 O 3 having a mixed structure of the remainder being alpha (α) type crystal In the tool, the hard coating layer becomes remarkably excellent in toughness due to the first layer and the second layer constituting the hard coating layer, and even if intermittent cutting that requires particularly high toughness is performed at a high speed We obtained the research result that even if it was carried out under heavy cutting conditions such as high feed depth, the cutting edge did not chip or chip and excellent cutting performance could be exhibited 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、超硬基体の表面に、ＴｉＣ，Ｔ
ｉＮ，ＴｉＣＮ，ＴｉＣＯ，ＴｉＮＯ、およびＴｉＣＮ
Ｏ、並びにＡｌ2 Ｏ3 のうちの２種以上の複層で構成さ
れた硬質被覆層を３〜３０μｍの平均層厚で形成してな
る被覆超硬切削工具において、（ａ） 上記基体を、 Ｃｏ：４〜１０％、 Ｃｒ：０．２〜１％、 を含有し、残りがＷＣと不可避不純物からなる組成を有
するＷＣ基超硬合金で構成すると共に、（ｂ） 上記硬
質被覆層のうちの少なくとも第１層を粒状結晶組織を有
するＴｉＮと基体構成拡散成分との反応固溶体、同第２
層を縦長成長結晶組織を有するＴｉＣＮと基体構成拡散
成分との反応固溶体で構成すること、により硬質被覆層
にすぐれた靭性を付与せしめてなる被覆超硬切削工具に
特徴を有するものである。The present invention was made based on the results of the above research, and TiC, T was formed on the surface of a cemented carbide substrate.
iN, TiCN, TiCO, TiNO, and TiCN
In a coated cemented carbide cutting tool formed by forming a hard coating layer composed of two or more layers of O and Al 2 O 3 with an average layer thickness of 3 to 30 μm, (a) Co: 4 to 10%, Cr: 0.2 to 1%, and the rest is composed of a WC-based cemented carbide having a composition of WC and inevitable impurities, and (b) of the hard coating layers. Of at least the first layer of TiN having a granular crystal structure and a reaction solid solution of a diffusion component constituting the substrate,
The coated carbide cutting tool is characterized by imparting excellent toughness to the hard coating layer by forming the layer by a reaction solid solution of TiCN having a vertically elongated crystal structure and a diffusion component constituting the substrate.
【０００６】つぎに、この発明の被覆超硬切削工具を構
成する超硬基体のＣｏおよびＣｒ含有量を上記の通りに
限定した理由を説明する。 （ａ） Ｃｏ Ｃｏ成分には、焼結性を向上させ、もって超硬基体の強
度を向上させるほか、自らも結合相を形成して靭性を向
上させる作用があるが、その含有量が４％未満では前記
作用に所望の効果が得られず、一方その含有量が１０％
を越えると耐摩耗性が低下するようになることから、そ
の含有量を４〜１０％と定めた。Next, the reason why the Co and Cr contents of the cemented carbide substrate constituting the coated cemented carbide cutting tool of the present invention are limited as described above will be explained. (A) Co The Co component has the function of improving the sinterability and thus the strength of the cemented carbide substrate, and also forming the binder phase to improve the toughness, but its content is 4%. If less than 10%, the desired effect cannot be obtained, while the content is 10%.
If it exceeds, the wear resistance will be deteriorated, so the content was set to 4 to 10%.
【０００７】（ｂ） Ｃｒ Ｃｒ成分には、結合相に固溶して、分散相を形成するＷ
Ｃ粒の微細化に寄与するほか、加熱処理時に超硬基体を
構成する成分の硬質被覆層への拡散を促進し、かつ自ら
も前記硬質被覆層に拡散し、前記硬質被覆層を構成する
ＴｉＣおよびＴｉＣＮと反応して固溶体を形成し、前記
硬質被覆層の靭性を向上させる作用があるが、その含有
量が０．２％未満では前記作用に所望の効果が得られ
ず、一方その含有量が１％を越えると、特に結合相の靭
性が低下するようになることから、その含有量を０．２
〜１％と定めた。(B) Cr The Cr component is a W that forms a dispersed phase by forming a solid solution with the binder phase.
TiC that contributes to the miniaturization of the C particles, promotes the diffusion of the constituents of the cemented carbide substrate into the hard coating layer during heat treatment, and diffuses itself into the hard coating layer to form the hard coating layer. And has the effect of reacting with TiCN to form a solid solution and improving the toughness of the hard coating layer, but if the content is less than 0.2% the desired effect is not obtained on the other hand, while the content thereof is When the content exceeds 1%, the toughness of the binder phase particularly decreases, so the content is 0.2
It was set at ~ 1%.
【０００８】また、硬質被覆層の平均層厚を３〜３０μ
ｍとしたのは、その平均層厚が３μｍ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、一方その平均
層厚が３０μｍを越えると切刃に欠けやチッピングが発
生し易くなるという理由によるものである。The average thickness of the hard coating layer is 3 to 30 μm.
When the average layer thickness is less than 3 μm, desired excellent wear resistance cannot be secured, while when the average layer thickness exceeds 30 μm, chipping or chipping of the cutting edge is likely to occur. The reason is that.
【０００９】さらに、上記の硬質被覆層を、化学蒸着法
および物理蒸着法を用い、通常の条件で形成した場合、
Ａｌ2 Ｏ3 層はα型結晶組織をもち、その他の各層は粒
状結晶組織をもつようになるのが一般的である。一方、
上記の硬質被覆層の第２層を構成する縦長成長結晶組織
を有するＴｉＣＮ層は、例えば特開平６−８０１０号公
報に記載されるように、 （ａ） 反応ガス組成：容量％で、ＴｉＣｌ4 ：１〜４
％、ＣＨ3 ：０．１〜５％、Ｎ2 ：０〜３５％、Ｈ2 ：
残り、 （ｂ） 反応温度：８５０〜９５０℃、 （ｃ） 雰囲気圧力：３０〜２００torr、 の条件で形成することができる。また、同じくＫ型結晶
を主体とする組織を有するＡｌ2 Ｏ3 層は、 （ａ） 反応ガス組成：容量％で、初期段階の１〜１２
０分を、ＡｌＣｌ3 ：１〜２０％、Ｈ2 ：残り、または
ＡｌＣｌ3 ：１〜２０％、ＨＣｌ：１〜２０％および／
またはＨ2 Ｓ：０．０５〜５％、Ｈ2 ：残りとし、以
後、ＡｌＣｌ3 ：１〜２０％、ＣＯ2 ：０．５〜３０
％、Ｈ2 ：残り、またはＡｌＣｌ3 ：１〜２０％、ＣＯ
2 ：０．５〜３０％、ＨＣｌ：１〜２０％および／また
はＨ2 Ｓ：０．０５〜５％、Ｈ2 ：残り、 （ｂ） 反応温度：８５０〜１０００℃、 （ｃ） 雰囲気圧力：３０〜２００torr、 の条件で形成される。Further, when the above-mentioned hard coating layer is formed under the usual conditions by the chemical vapor deposition method and the physical vapor deposition method,
Generally, the Al 2 O 3 layer has an α-type crystal structure, and each of the other layers has a granular crystal structure. on the other hand,
The TiCN layer having a vertically elongated crystal structure that constitutes the second layer of the hard coating layer is, for example, as described in JP-A-6-8010, (a) Reactive gas composition: volume%, TiCl 4 : 1 to 4
%, CH 3: 0.1~5%, N 2: 0~35%, H 2:
The rest can be formed under the following conditions: (b) reaction temperature: 850 to 950 ° C., (c) atmospheric pressure: 30 to 200 torr. Also, the Al 2 O 3 layer having a structure mainly composed of K-type crystals has the following composition:
0 minutes, AlCl 3: 1~20%, H 2: remainder, or AlCl 3,: 1~20%, HCl : 1~20% and /
Or H 2 S: 0.05~5%, H 2: the remainder, hereinafter, AlCl 3: 1~20%, CO 2: 0.5~30
%, H 2 : remaining, or AlCl 3 : 1 to 20%, CO
2 : 0.5 to 30%, HCl: 1 to 20% and / or H 2 S: 0.05 to 5%, H 2 : remaining, (b) reaction temperature: 850 to 1000 ° C., (c) atmospheric pressure : 30 to 200 torr.
【００１０】[0010]
【発明の実施の形態】つぎに、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。原料粉末とし
て、平均粒径：２μｍのＷＣ粉末、同２μｍのＣｒ3 Ｃ
2 粉末、および同１．５μｍのＣｏ粉末を用い、これら
原料粉末を所定の配合割合に配合し、ボールミルで７２
時間湿式混合し、乾燥した後、ＩＳＯ規格ＣＮＭＡ１２
０４０８に定める形状の圧粉体にプレス成形し、この圧
粉体を、０．１torrの真空中、１３５０〜１５００℃の
範囲内の所定温度に１時間保持の条件で真空焼結するこ
とにより、表１に示される組成をもった超硬基体Ａ〜Ｅ
をそれぞれ製造した。BEST MODE FOR CARRYING OUT THE INVENTION Next, the coated carbide cutting tool of the present invention will be specifically described by way of Examples. As the raw material powder, WC powder having an average particle size of 2 μm and Cr 3 C having the same particle size of 2 μm
2 powders and the same 1.5 μm Co powder were used.
After wet mixing and drying for an hour, ISO standard CNMA12
By press forming into a green compact having a shape defined in 0408, and vacuum-sintering the green compact in a vacuum of 0.1 torr at a predetermined temperature within the range of 1350 to 1500 ° C. for 1 hour, Carbide substrates A to E having the compositions shown in Table 1
Was manufactured respectively.
【００１１】ついで、これらの超硬基体Ａ〜Ｅの表面
に、ホーニングを施した状態で、通常の化学蒸着装置を
用い、表２に示される条件で、表３に示される平均層厚
のＴｉＣ層およびＴｉＣＮ層を形成し、この状態で３５
torrの水素雰囲気中、１０５０℃に１時間保持の条件で
加熱処理を施し、引続いて同じく表２に示される条件
で、表３に示される組成および平均層厚の第３層以降の
硬質被覆層を形成することにより本発明被覆超硬切削工
具１〜１０をそれぞれ製造した。また、比較の目的で、
上記加熱処理を硬質被覆層の第１層および第２層の形成
後に行なわない以外は同一の条件で上記超硬基体の表面
に硬質被覆層を形成することにより比較被覆超硬切削工
具１〜１０をそれぞれ製造した。なお、この結果得られ
た各種の被覆超硬切削工具について、硬質被覆層の第１
層および第２層をＸ線回折装置を用いて観察したとこ
ろ、本発明被覆超硬切削工具１〜１０のいずれにも超硬
基体の構成成分であるＣｒ，Ｃｏ、およびＷが存在し、
これらの成分がＴｉＣＮと反応固溶体を形成しているこ
とが確認され、一方比較被覆超硬切削工具１〜１０の硬
質被覆層の第１層および第２層はそれぞれＴｉＣおよび
ＴｉＣＮからなるものであった。Then, the surfaces of these cemented carbide substrates A to E were subjected to honing, using a normal chemical vapor deposition apparatus, and under the conditions shown in Table 2 under the conditions shown in Table 2 TiC having the average layer thickness shown in Table 3. Layer and TiCN layer are formed, and in this state 35
A heat treatment was performed in a hydrogen atmosphere of torr at 1050 ° C. for 1 hour, and subsequently, under the conditions shown in Table 2 as well, a hard coating after the third layer having the composition and average layer thickness shown in Table 3 was used. Each of the coated carbide cutting tools 1 to 10 of the present invention was manufactured by forming a layer. Also, for comparison purposes,
Comparative Coated Carbide Cutting Tools 1-10 by forming a hard coating layer on the surface of the cemented carbide substrate under the same conditions, except that the heat treatment is not performed after forming the first and second hard coating layers. Were manufactured respectively. Regarding the various coated cemented carbide cutting tools obtained as a result, the first hard coating layer
When the layer and the second layer were observed using an X-ray diffractometer, Cr, Co, and W, which are constituent components of the cemented carbide substrate, were present in any of the coated cemented carbide cutting tools 1 to 10 of the present invention,
It was confirmed that these components formed a reaction solid solution with TiCN, while the first and second hard coating layers of the comparative coated cemented carbide cutting tools 1 to 10 were composed of TiC and TiCN, respectively. It was
【００１２】つぎに、上記の本発明被覆超硬切削工具１
〜１０および比較被覆超硬切削工具１〜１０について、 被削材：ＦＣ３００（硬さＨB １８０）の角材、 切削速度：３５０ｍ／min.、 送り：０．３mm／rev.、 切込み：１．５mm、 切削時間：２０分、 の条件での鋳鉄の湿式高速断続切削試験、および、 被削材：ＦＣ３００（硬さＨB １８０）の角材、 切削速度：２５０ｍ／min.、 送り：０．４５mm／rev.、 切込み：３．５mm、 切削時間：２５分、 の条件での鋳鉄の湿式高切込み断続切削試験を行ない、
切刃の逃げ面摩耗幅を測定した。これらの測定結果を表
４に示した。Next, the above coated carbide cutting tool 1 of the present invention
-10 and comparative coated carbide cutting tools 1 to 10: Work material: FC300 (hardness H B 180) square material, Cutting speed: 350 m / min., Feed: 0.3 mm / rev., Depth of cut: 1. 5 mm, cutting time: 20 minutes, wet high speed intermittent cutting test of cast iron, and work material: FC300 (hardness H B 180) square material, cutting speed: 250 m / min., Feed: 0.45 mm / Rev., Depth of cut: 3.5 mm, cutting time: 25 minutes, wet high depth interrupted cutting test of cast iron
The flank wear width of the cutting blade was measured. Table 4 shows the results of these measurements.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【表３】 [Table 3]
【００１６】[0016]
【表４】 [Table 4]
【００１７】[0017]
【発明の効果】表３，４に示される結果から、本発明被
覆超硬切削工具１〜１０は、これを構成する硬質被覆層
のうちの少なくとも第１層および第２層を構成するＴｉ
Ｃと基体構成拡散成分との反応固溶体およびＴｉＣＮと
基体構成拡散成分との反応固溶体によってすぐれた靭性
が確保されることから、断続切削を高速で行なっても、
また断続切削を高送り条件で行なっても切刃に欠けやチ
ッピングの発生なく、すぐれた切削性能を発揮するのに
対して、硬質被覆層のうちの第１層および第２層がそれ
ぞれＴｉＣ層およびＴｉＣＮ層で構成される比較被覆超
硬切削工具１〜１０においては、上記の苛酷な条件での
切削では切刃に欠けやチッピングが発生し、比較的短時
間で使用寿命に至ることが明らかである。上述のよう
に、この発明の被覆超硬切削工具は、特に硬質被覆層が
すぐれた靭性を有するので、苛酷な条件で連続切削は勿
論のこと、断続切削でもすぐれた切削性能を著しく長期
に亘って発揮するのである。From the results shown in Tables 3 and 4, the coated carbide cutting tools 1 to 10 of the present invention have Ti constituting at least the first layer and the second layer of the hard coating layers constituting the same.
Since excellent toughness is ensured by the reaction solid solution of C and the base constituent diffusion component and the reaction solid solution of TiCN and the base constituent diffusion component, even if intermittent cutting is performed at high speed,
Moreover, even if intermittent cutting is performed under high feed conditions, the cutting edge does not chip or chip and excellent cutting performance is exhibited, whereas the first and second hard coating layers are TiC layers, respectively. In the comparative coated carbide cutting tools 1 to 10 composed of the TiCN layer and the TiCN layer, it is clear that the cutting edge is chipped or chipped when cutting under the severe conditions described above, and the service life is reached in a relatively short time. Is. As described above, the coated carbide cutting tool of the present invention has excellent toughness particularly in the hard coating layer, so that not only continuous cutting under severe conditions but also excellent cutting performance in intermittent cutting can be achieved over a long period of time. Will be demonstrated.
Claims (1)
に、Ｔｉの炭化物、窒化物、炭窒化物、炭酸化物、酸窒
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２種以上の複層で構成された硬質被覆層を３〜３０
μｍの平均層厚で形成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において、 （ａ） 上記基体を、重量％で、 Ｃｏ：４〜１０％、 Ｃｒ：０．２〜１％、 を含有し、残りが炭化タングステンと不可避不純物から
なる組成を有する炭化タングステン基超硬合金で構成す
ると共に、 （ｂ） 上記硬質被覆層のうちの少なくとも第１層を粒
状結晶組織を有する窒化チタンと基体構成拡散成分との
反応固溶体、同第２層を縦長成長結晶組織を有する炭窒
化チタンと基体構成拡散成分との反応固溶体で構成した
こと、を特徴とする硬質被覆層がすぐれた靭性を有する
表面被覆炭化タングステン基超硬合金製切削工具。1. A surface of a tungsten carbide-based cemented carbide substrate is provided with two or more of Ti carbide, nitride, carbonitride, carbon oxide, oxynitride, and carbonitride oxide, and aluminum oxide. 3-30 hard coating layer composed of multiple layers
In a surface-coated tungsten carbide-based cemented carbide cutting tool formed with an average layer thickness of μm, (a) the above-mentioned base body is, by weight%, Co: 4 to 10%, Cr: 0.2 to 1%, And a balance of tungsten carbide-based cemented carbide having a composition of tungsten carbide and unavoidable impurities, and (b) at least the first layer of the hard coating layer is titanium nitride having a granular crystal structure. A hard coating layer having excellent toughness, characterized in that it is made of a reaction solid solution with a base constituent diffusion component and the second layer is made of a reaction solid solution of a titanium carbonitride having a vertically elongated crystal structure and a base constituent diffusion component. Cutting tool made of surface-coated tungsten carbide based cemented carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7414196A JPH09262705A (en) | 1996-03-28 | 1996-03-28 | Surface coated tungsten carbide group super hard alloy cutting tool having excellent toughness in hard coating layer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7414196A JPH09262705A (en) | 1996-03-28 | 1996-03-28 | Surface coated tungsten carbide group super hard alloy cutting tool having excellent toughness in hard coating layer thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09262705A true JPH09262705A (en) | 1997-10-07 |
Family
ID=13538610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7414196A Pending JPH09262705A (en) | 1996-03-28 | 1996-03-28 | Surface coated tungsten carbide group super hard alloy cutting tool having excellent toughness in hard coating layer thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09262705A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6589602B2 (en) | 2001-04-17 | 2003-07-08 | Toshiba Tungaloy Co., Ltd. | Highly adhesive surface-coated cemented carbide and method for producing the same |
| JP2004509773A (en) | 2000-08-11 | 2004-04-02 | ケンナメタル インコーポレイテッド | Chromium-containing cemented tungsten carbide coated cutting insert |
| JP2004510589A (en) * | 2000-08-11 | 2004-04-08 | ケンナメタル インコーポレイテッド | Chromium-containing sintered cemented carbide body with binder-enriched surface area |
| US6723389B2 (en) | 2000-07-21 | 2004-04-20 | Toshiba Tungaloy Co., Ltd. | Process for producing coated cemented carbide excellent in peel strength |
| JP2004268251A (en) * | 2003-02-17 | 2004-09-30 | Kyocera Corp | Surface coated cutting tool and its manufacturing method |
| WO2014054591A1 (en) | 2012-10-01 | 2014-04-10 | 日立ツール株式会社 | Hard film coating tool and method for manufacturing said tool |
| US20170009352A1 (en) * | 2013-11-29 | 2017-01-12 | Kyocera Corporation | Cutting tool |
| CN111690862A (en) * | 2020-06-30 | 2020-09-22 | 江西中孚硬质合金股份有限公司 | Hard alloy for turnout steel rail milling cutter, milling cutter blank preparation method and milling cutter blank |
-
1996
- 1996-03-28 JP JP7414196A patent/JPH09262705A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6723389B2 (en) | 2000-07-21 | 2004-04-20 | Toshiba Tungaloy Co., Ltd. | Process for producing coated cemented carbide excellent in peel strength |
| JP2004509773A (en) | 2000-08-11 | 2004-04-02 | ケンナメタル インコーポレイテッド | Chromium-containing cemented tungsten carbide coated cutting insert |
| JP2004510589A (en) * | 2000-08-11 | 2004-04-08 | ケンナメタル インコーポレイテッド | Chromium-containing sintered cemented carbide body with binder-enriched surface area |
| US6589602B2 (en) | 2001-04-17 | 2003-07-08 | Toshiba Tungaloy Co., Ltd. | Highly adhesive surface-coated cemented carbide and method for producing the same |
| EP1253124B2 (en) † | 2001-04-17 | 2011-06-15 | Tungaloy Corporation | Highly adhesive surface-coated cemented carbide and method for producing the same |
| JP2004268251A (en) * | 2003-02-17 | 2004-09-30 | Kyocera Corp | Surface coated cutting tool and its manufacturing method |
| JP4562401B2 (en) * | 2003-02-17 | 2010-10-13 | 京セラ株式会社 | Surface coated cutting tool |
| WO2014054591A1 (en) | 2012-10-01 | 2014-04-10 | 日立ツール株式会社 | Hard film coating tool and method for manufacturing said tool |
| US9534292B2 (en) | 2012-10-01 | 2017-01-03 | Hitachi Tool Engineering, Ltd. | Hard-coated tool and its production method |
| US20170009352A1 (en) * | 2013-11-29 | 2017-01-12 | Kyocera Corporation | Cutting tool |
| US10113239B2 (en) * | 2013-11-29 | 2018-10-30 | Kyocera Corporation | Cutting tool |
| CN111690862A (en) * | 2020-06-30 | 2020-09-22 | 江西中孚硬质合金股份有限公司 | Hard alloy for turnout steel rail milling cutter, milling cutter blank preparation method and milling cutter blank |
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