JP2932853B2 - Surface coated titanium carbonitride based cermet cutting tool with excellent chipping resistance - Google Patents
Surface coated titanium carbonitride based cermet cutting tool with excellent chipping resistanceInfo
- Publication number
- JP2932853B2 JP2932853B2 JP4235265A JP23526592A JP2932853B2 JP 2932853 B2 JP2932853 B2 JP 2932853B2 JP 4235265 A JP4235265 A JP 4235265A JP 23526592 A JP23526592 A JP 23526592A JP 2932853 B2 JP2932853 B2 JP 2932853B2
- Authority
- JP
- Japan
- Prior art keywords
- crystal structure
- cutting tool
- based cermet
- titanium carbonitride
- granular
- 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 - Lifetime
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- Cutting Tools, Boring Holders, And Turrets (AREA)
- Chemical Vapour Deposition (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、すぐれた耐チッピン
グ性を有し、従って、この結果例えば鋼や鋳鉄などの高
速切削に用いた場合にも切刃にチッピング（微小欠け）
の発生なく、すぐれた耐摩耗性を発揮する表面被覆炭窒
化チタン（以下、ＴｉＣＮで示す）基サーメット製切削
工具に関するものである。BACKGROUND OF THE INVENTION The present invention has excellent chipping resistance, and as a result, even when used for high-speed cutting of steel or cast iron, for example, the cutting edge is chipped (minute chipping).
The present invention relates to a surface coated titanium carbonitride (hereinafter, referred to as TiCN) -based cermet-based cutting tool exhibiting excellent wear resistance without generation of cracks.
【０００２】[0002]
【従来の技術】従来、一般に、例えば特開昭５４−１１
７５１０号公報に記載される通り、ＴｉＣＮ基サーメッ
ト基体や、結合相形成成分としてのＣｏやＮｉなどの含
有量が基体内部に比して相対的に高い表面部、すなわち
結合相富化表面部を有するＴｉＣＮ基サーメット基体の
表面に、化学蒸着法や物理蒸着法を用いて、ＴｉＣＮで
構成された硬質被覆層を０．５〜２０μｍの平均層厚で
形成してなる表面被覆ＴｉＣＮ基サーメット製切削が、
例えば鋼や鋳鉄の連続切削や断続切削に用いられている
ことは良く知られるところである。2. Description of the Related Art Conventionally, generally, for example, Japanese Patent Application Laid-Open No. 54-11 / 1979
As described in Japanese Patent No. 7510, a TiCN-based cermet substrate and a surface portion having a relatively high content of Co or Ni as a binder phase forming component as compared with the inside of the substrate, that is, a binder phase-enriched surface portion, are used. A surface-coated TiCN-based cermet made by forming a hard coating layer composed of TiCN with an average thickness of 0.5 to 20 μm on the surface of a TiCN-based cermet substrate having the same using a chemical vapor deposition method or a physical vapor deposition method. But,
For example, it is well known that it is used for continuous cutting or interrupted cutting of steel or 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
の高性能化および切削加工の省力化はめざましく、これ
に伴ない切削加工は年々高速化の傾向にあるが、上記の
従来表面被覆ＴｉＣＮ基サーメット製切削工具は、これ
を例えば鋼や鋳鉄の高速切削に用いると、特に硬質被覆
層の靭性不足が原因で切刃にチッピングが発生し易く、
チッピングが原因の摩耗が進行し、比較的短時間で使用
寿命に至るものである。On the other hand, in recent years, high performance of cutting machines and labor saving of cutting work have been remarkable, and cutting work tends to be accelerated year by year. If the base cermet cutting tool is used for high-speed cutting of steel or cast iron, for example, chipping is likely to occur on the cutting edge due to insufficient toughness of the hard coating layer,
Wear due to chipping progresses, 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、上記の従来表面被覆ＴｉＣＮ基
サーメット製切削工具に着目し、これの耐チッピング性
の向上をはかるべく研究を行なった結果、一般に、例え
ば化学蒸着法により硬質被覆層としてのＴｉＣＮ層を形
成するに際しては、 反応ガス組成；容量％で、ＴｉＣｌ4 ：１〜５％、ＣＨ
4 ：５〜７％、Ｎ2 ：２０〜３０％、Ｈ2 ：残り、 反応温度：９５０〜１０５０℃、 雰囲気圧力：５０〜２００トル、 の条件で行なわれ、形成されたＴｉＣＮ層は粒状結晶組
織を有するのが通常であるが、この粒状結晶組織を有す
るＴｉＣＮ層形成の後半過程または中間過程、あるいは
前半過程のＴｉＣＮ層形成条件を、相対的に反応温度を
低温にして、反応ガス組成をかえた条件、すなわち、 反応ガス組成；容量％で、ＴｉＣｌ4 ：１〜４％、ＣＨ
3 ＣＮ：０．１〜１％、Ｎ2 ：０〜２５％、Ｈ2 ：残
り、 反応温度：８００〜９００℃、 雰囲気圧力：３０〜２００トル、 の条件にすると、この結果のＴｉＣＮ層は、それぞれ、
（ａ） 粒状結晶組織から縦長成長結晶組織へ変る結晶
構造、（ｂ） 粒状結晶組織から縦長成長結晶組織へ、
さらにこの縦長成長結晶組織から粒状結晶組織へ変る結
晶構造、（ｃ） 縦長成長結晶組織から粒状結晶組織へ
変る結晶構造、上記（ａ）〜（ｃ）のうちのいずれかの
結晶構造をもつようになり、かつＴｉＣＮの単層または
２層以上の積層からなる硬質被覆層のうちの１層または
２層以上を、上記（ａ）〜（ｃ）のうちのいずれか、ま
たは２種以上の結晶構造としてなる表面被覆ＴｉＣＮ基
サーメット製切削工具は、ＴｉＣＮ中の粒状結晶組織と
共存する縦長成長結晶組織によって切刃の耐チッピング
性が著しく向上するようになり、鋼や鋳鉄などの高速切
削ですぐれた耐摩耗性を長期に亘って発揮するという研
究結果を得たのである。Means for Solving the Problems Accordingly, the present inventors have
In view of the above, the above-mentioned conventional surface-coated TiCN-based cermet cutting tool was focused on, and as a result of researching to improve the chipping resistance of the cutting tool, as a result, for example, as a hard coating layer by, for example, a chemical vapor deposition method, In forming the TiCN layer, the reaction gas composition: TiCl 4 : 1 to 5% by volume, CH
4: 5~7%, N 2: 20~30%, H 2: remainder, reaction temperature: 950 to 1050 ° C., atmospheric pressure: 50 to 200 Torr, is performed in conditions, TiCN layer formed granular crystal Although it is normal to have a structure, the reaction gas composition is set to a relatively low reaction temperature by setting the TiCN layer formation conditions in the second half process, intermediate process, or first half process of forming the TiCN layer having the granular crystal structure to a relatively low reaction temperature. The changed conditions, ie, the reaction gas composition; in volume%, TiCl 4 : 1 to 4%, CH
3 CN: 0.1~1%, N 2 : 0~25%, H 2: remainder, reaction temperature: 800 to 900 ° C., atmospheric pressure: 30 to 200 Torr, when the conditions, TiCN layers of the results ,Each,
(A) a crystal structure that changes from a granular crystal structure to a vertically elongated crystal structure, (b) a crystal structure from a granular crystal structure to a vertically elongated crystal structure,
Further, it has a crystal structure that changes from the vertically-grown crystal structure to a granular crystal structure, (c) a crystal structure that changes from the vertically-grown crystal structure to a granular crystal structure, and any one of the above (a) to (c). And one or more of the hard coating layers composed of a single layer or a laminate of two or more layers of TiCN are replaced with any one of the above (a) to (c) or two or more types of crystals. The surface-coated TiCN-based cermet cutting tool, which has a structure, has a significantly improved chipping resistance of the cutting edge due to the vertically elongated crystal structure coexisting with the granular crystal structure in TiCN, and is excellent in high-speed cutting of steel and cast iron. The research results show that the wear resistance is 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、ＴｉＣＮ基サーメット基体、ま
たは結合相富化表面部を有するＴｉＣＮ基サーメット基
体の表面に、ＴｉＣＮの単層または２層以上の積層から
なる硬質被覆層を０．５〜２０μｍの平均層厚で形成し
てなる表面被覆ＴｉＣＮ基サーメット製切削工具におい
て、上記ＴｉＣＮ層の単層または２層以上の積層からな
る構成層のうちの１層または２層以上を、（ａ） 粒状
結晶組織から縦長成長結晶組織へ変る結晶構造、（ｂ）
粒状結晶組織から縦長成長結晶組織へ、さらにこの縦
長成長結晶組織から粒状結晶組織へ変る結晶構造、
（ｃ） 縦長成長結晶組織から粒状結晶組織へ変る結晶
構造、上記（ａ）〜（ｃ）のうちのいずれか、または２
種以上の結晶構造とすることにより耐チッピング性の向
上をはかった表面被覆ＴｉＣＮ基サーメット製切削工具
に特徴を有するものである。The present invention has been made on the basis of the above-mentioned research results, and a TiCN-based cermet substrate or a TiCN-based cermet substrate having a binder-phase-enriched surface portion is provided with a TiCN monolayer or a bilayer. In a cutting tool made of a surface-coated TiCN-based cermet formed by forming a hard coating layer having the above-mentioned lamination with an average layer thickness of 0.5 to 20 μm, a component layer composed of a single layer of the above-mentioned TiCN layer or a lamination of two or more layers (A) a crystal structure that changes from a granular crystal structure to a vertically elongated crystal structure,
A crystal structure that changes from a granular crystal structure to a vertically-grown crystal structure, and further from this vertically-grown crystal structure to a granular crystal structure,
(C) a crystal structure that changes from a vertically grown crystal structure to a granular crystal structure, any one of the above (a) to (c), or 2
The present invention is characterized by a surface-coated TiCN-based cermet-made cutting tool having an improved chipping resistance by having a crystal structure of more than one kind.
【０００６】なお、この発明の表面被覆ＴｉＣＮ基サー
メット製切削工具において、硬質被覆層の平均層厚を
０．５〜２０μｍと定めたのは、その層厚が０．５μｍ
未満では、硬質被覆層によってもたらされる所望のすぐ
れた耐摩耗性を確保することができず、一方その層厚が
２０μｍを越えると切刃に欠けが発生し易くなるという
理由によるものである。In the cutting tool made of a surface-coated TiCN-based cermet according to the present invention, the average thickness of the hard coating layer is determined to be 0.5 to 20 μm because the thickness is 0.5 μm.
If the thickness is less than the above, the desired excellent wear resistance provided by the hard coating layer cannot be ensured. On the other hand, if the thickness exceeds 20 μm, chipping is likely to occur in the cutting edge.
【０００７】[0007]
【実施例】つぎに、この発明の表面被覆ＴｉＣＮ基サー
メット製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、いずれも１〜２μｍの範囲内の所定の平
均粒径を有するＴｉＣＮ粉末、ＴｉＣ粉末、ＴｉＮ粉
末、ＴａＣ粉末、ＮｂＣ粉末、ＷＣ粉末、Ｍｏ2 Ｃ粉
末、ＺｒＣ粉末、Ｃｏ粉末、およびＮｉ粉末を用い、こ
れら原料粉末を表１に示される配合組成に配合し、ボー
ルミルで７２時間湿式混合し、乾燥した後、この混合粉
末を圧粉体にプレス成形し、ついでこの圧粉体の１部
を、１０-2トルの真空中、１４５０〜１５００℃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
より結合相富化表面部の形成がないＴｉＣＮ基サーメッ
ト基体Ａ〜Ｃを製造し、また上記圧粉体の残りには、焼
結温度までの昇温過程を１０-2トルの真空雰囲気とし、
１４５０〜１５５０℃の範囲内の所定の焼結温度に到達
後は雰囲気を１０トルのＮ2 雰囲気として１時間保持
し、焼結温度からの冷却を１０-1トルの真空中で行なう
焼結を施すことにより、同じく表１に示される最大結合
相含有量と厚さの結合相富化表面部を有するＴｉＣＮ基
サーメット基体Ｄ〜Ｆをそれぞれ製造した。なお、この
結果得られたＴｉＣＮ基サーメット基体Ａ〜Ｆは、いず
れもＩＳＯ・ＣＮＭＧ１２０４０８の切削チップ形状を
もつものである。Next, a cutting tool made of a surface-coated TiCN-based cermet according to the present invention will be described in detail with reference to examples. As raw material powders, both TiCN powder having a predetermined average particle size in the range of 1 to 2 [mu] m, TiC powder, TiN powder, TaC powder, NbC powder, WC powder, Mo 2 C powder, ZrC powder, Co powder, and Using Ni powder, these raw material powders were blended into the blending composition shown in Table 1, wet-mixed for 72 hours with a ball mill, dried, and then press-molded into a green compact. One part is vacuum-sintered at a predetermined temperature in the range of 1450 to 1500 ° C. for 1 hour in a vacuum of 10 −2 Torr to form a TiCN-based cermet substrate A having no binder phase-enriched surface portion ~ C, and the rest of the green compact is heated to a sintering temperature in a vacuum atmosphere of 10 -2 Torr,
After reaching a predetermined sintering temperature within the range of 1450 to 1550 ° C., the atmosphere is maintained at 10 torr N 2 atmosphere for 1 hour, and the sintering is performed by cooling from the sintering temperature in a vacuum of 10 -1 torr. By applying the same, TiCN-based cermet substrates D to F having a binder phase-enriched surface portion having the same maximum binder phase content and thickness as shown in Table 1 were produced, respectively. The TiCN-based cermet substrates A to F obtained as a result all have a cutting tip shape of ISO • CNMG120408.
【０００８】ついで、これらのＴｉＣＮ基サーメット基
体Ａ〜Ｆの表面に、通常の化学蒸着装置を用い、ＴｉＣ
Ｎの粒状結晶組織の形成条件を、 反応ガス組成；容量％で、ＴｉＣｌ3 ：３％、ＣＨ3 ：
５％、Ｎ2 ：２５％、Ｈ2 ：残り、 反応温度：１０２０℃、 雰囲気圧力：１００トル、 とし、またＴｉＣＮの縦長成長結晶組織の形成条件を、 反応ガス組成；容量％で、ＴｉＣｌ4 ：１．５％、ＣＨ
3 ＣＮ：０．５％、Ｎ2 ：２５％、Ｈ2 ：残り、 反応温度：８６０℃、 雰囲気圧力：５０トル、 とし、これらの形成条件を構成層ごとに形成途中で適宜
変換して、表２，３に示される結晶構造を有する単層ま
たは２層以上の積層からなるＴｉＣＮ構成層を、同じく
表２，３に示される平均層厚で形成することにより本発
明表面被覆ＴｉＣＮ基サーメット製切削工具（以下、本
発明被覆切削工具という）１〜１２をそれぞれ製造し
た。Next, the surface of each of the TiCN-based cermet substrates A to F is
The conditions for forming the granular crystal structure of N are as follows: reaction gas composition; volume%, TiCl 3 : 3%, CH 3 :
5%, N 2: 25% , H 2: remainder, reaction temperature: 1020 ° C., atmospheric pressure: 100 Torr, and then, also the formation conditions of the longitudinal growth crystal structure of TiCN, the reaction gas composition; in volume%, TiCl 4 : 1.5%, CH
3 CN: 0.5%, N 2 : 25%, H 2 : residual, reaction temperature: 860 ° C., atmospheric pressure: 50 torr, and these forming conditions were appropriately changed during the formation of each constituent layer. The surface-coated TiCN-based cermet according to the present invention is formed by forming a single layer or a laminate of two or more layers having a crystal structure shown in Tables 2 and 3 with an average layer thickness also shown in Tables 2 and 3. Cutting tools (hereinafter, referred to as coated cutting tools of the present invention) 1 to 12 were manufactured, respectively.
【０００９】また、比較の目的で、表３に示される通り
ＴｉＣＮ層の結晶構造を粒状結晶組織とする以外は同一
の条件で従来表面被覆ＴｉＣＮ基サーメット製切削工具
（以下、従来被覆切削工具という）１〜６をそれぞれ製
造した。[0009] For the purpose of comparison, a cutting tool made of a conventional surface-coated TiCN-based cermet (hereinafter referred to as a conventional coated cutting tool) under the same conditions except that the crystal structure of the TiCN layer is a granular crystal structure as shown in Table 3. ) 1 to 6 were produced respectively.
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【表２】 [Table 2]
【００１２】[0012]
【表３】 [Table 3]
【００１３】つぎに、この結果得られた各種の被覆切削
工具について、 被削材：ＳＣＭ４４０（硬さ：ＨB ２２０）、 切削速度：２５０ｍ／min.、 送り：０．２mm／rev.、 切込み：１mm、 切削時間：３０分、 の条件での鋼の乾式高速切削試験、並びに、 被削材：ＦＣ３０（硬さ：ＨB ２００）、 切削速度：３００ｍ／min.、 送り：０．２mm／rev.、 切込み：１mm、 切削時間：３０分、 の条件での鋳鉄の湿式高速切削試験を行ない、いずれの
場合も切刃の逃げ面摩耗幅を測定した。これらの測定結
果を表２，３に示した。[0013] Next, the resulting various coated cutting tool, work material: SCM440 (hardness: H B 220), cutting speed:. 250 meters / min, Feed:. 0.2 mm / rev, cut : 1 mm, cutting time: dry high-speed cutting test of steel in 30 minutes, conditions as well as work material: FC30 (hardness: H B 200), cutting speed:. 300 meters / min, feed: 0.2 mm / rev., depth of cut: 1 mm, cutting time: 30 minutes, a wet high-speed cutting test of cast iron was performed, and the flank wear width of the cutting edge was measured in each case. Tables 2 and 3 show the measurement results.
【００１４】また、図１および２には、本発明被覆切削
工具１および従来被覆切削工具３の表面部の走査電子顕
微鏡による縦断面組織写真（倍率：５０００倍）を示し
た。図示される通り、図１（本発明被覆切削工具１）に
は、粒状結晶組織から縦長成長結晶組織へ、さらにこの
縦長成長結晶組織から粒状結晶組織へ変る結晶構造のＴ
ｉＣＮ層（図１の下部は基体を示す）が示され、また図
２（従来被覆切削工具３）には、粒状結晶組織のみから
なるＴｉＣＮ層（図２の下部も同じく基体を示す）が示
されている。1 and 2 show micrographs (magnification: 5000 times) of vertical cross-sectional structures of the surface portions of the coated cutting tool 1 of the present invention and the conventional coated cutting tool 3 by a scanning electron microscope. As shown in FIG. 1, FIG. 1 (the coated cutting tool 1 of the present invention) shows a T having a crystal structure that changes from a granular crystal structure to a vertically-grown crystal structure, and further from this vertically-grown crystal structure to a granular crystal structure.
An iCN layer (the lower part of FIG. 1 shows the substrate) is shown, and FIG. 2 (conventional coated cutting tool 3) shows a TiCN layer consisting of only the granular crystal structure (the lower part of FIG. 2 also shows the substrate). Have been.
【００１５】[0015]
【発明の効果】表２，３および図１，２に示される結果
から、ＴｉＣＮの単層または２層以上の積層からなる構
成層のうちの少なくとも１層が、粒状結晶組織から縦長
成長結晶組織へ変る結晶構造、あるいは粒状結晶組織か
ら縦長成長結晶組織へ、さらにこの縦長成長結晶組織か
ら粒状結晶組織へ変る結晶組織、あるいは縦長成長結晶
組織から粒状結晶組織へ変る結晶構造を有する本発明被
覆切削工具１〜１２は、いずれも上記の結晶構造によっ
てすぐれた耐チッピング性を具備するようになることか
ら、特に耐チッピング性が要求される鋼や鋳鉄などの高
速切削に用いた場合に、粒状結晶組織のＴｉＣＮ層から
なる硬質被覆層を形成してなる従来被覆切削工具１〜６
に比してすぐれた耐摩耗性を示すことが明らかである。According to the results shown in Tables 2 and 3 and FIGS. 1 and 2, at least one of the constituent layers composed of a single layer of TiCN or a laminate of two or more layers is changed from a granular crystal structure to a vertically elongated crystal structure. The present invention coated cutting having a crystal structure that changes to a crystal structure, or a crystal structure that changes from a granular crystal structure to a vertically-grown crystal structure, further from this vertically-grown crystal structure to a granular crystal structure, or a crystal structure that changes from a vertically-grown crystal structure to a granular crystal structure. Since the tools 1 to 12 all have excellent chipping resistance due to the above-mentioned crystal structure, when used for high-speed cutting of steel or cast iron particularly requiring chipping resistance, the granular crystals Conventional coated cutting tools 1 to 6 formed by forming a hard coating layer composed of a TiCN layer of a structure
It is evident that it shows excellent wear resistance as compared with
【００１６】上述のように、この発明の表面被覆ＴｉＣ
Ｎ基サーメット製切削工具は、特に耐チッピング性が要
求される、例えば鋼や鋳鉄などの高速切削に用いた場合
にすぐれた耐摩耗性を示し、著しく長期に亘ってすぐれ
た切削性能を発揮するのである。As mentioned above, the surface-coated TiC of the present invention
N-base cermet cutting tools exhibit excellent wear resistance when used for high-speed cutting of steel or cast iron, for example, which requires chipping resistance, and exhibits excellent cutting performance over a long period of time. It is.
【図１】本発明被覆切削工具１の表面部の走査電子顕微
鏡による縦断面組織写真である。FIG. 1 is a vertical section micrograph of the surface of a coated cutting tool 1 of the present invention, taken by a scanning electron microscope.
【図２】従来被覆切削工具３の表面部の走査電子顕微鏡
による縦断面組織写真である。FIG. 2 is a longitudinal section micrograph of the surface of a conventional coated cutting tool 3 taken by a scanning electron microscope.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−311202（ＪＰ，Ａ) 特開 平６−57430（ＪＰ，Ａ) 特開 平６−49646（ＪＰ，Ａ) 特公 平３−72696（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) C23C 16/00 - 16/56 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-311202 (JP, A) JP-A-6-57430 (JP, A) JP-A-6-49646 (JP, A) 72696 (JP, B2) (58) Field surveyed (Int. Cl. 6 , DB name) C23C 16/00-16/56
Claims (2)
に、硬質被覆層を０．５〜２０μｍの平均層厚で形成し
てなる表面被覆炭窒化チタン基サーメット製切削工具に
おいて、 上記硬質被覆層を、炭窒化チタンの単層または２層以上
の積層で構成すると共に、これら構成層のうちの１層ま
たは２層以上を、 （ａ） 粒状結晶組織から縦長成長結晶組織へ変る結晶
構造、 （ｂ） 粒状結晶組織から縦長成長結晶組織へ、さらに
この縦長成長結晶組織から粒状結晶組織へ変る結晶構
造、 （ｃ） 縦長成長結晶組織から粒状結晶組織へ変る結晶
構造、 上記（ａ）〜（ｃ）のうちのいずれか、または２種以上
の結晶構造としたことを特徴とする耐チッピング性にす
ぐれた表面被覆炭窒化チタン基サーメット製切削工具。1. A cutting tool made of a surface-coated titanium carbonitride-based cermet, wherein a hard coating layer is formed on the surface of a titanium carbonitride-based cermet substrate with an average layer thickness of 0.5 to 20 μm. A single layer or a laminate of two or more layers of titanium carbonitride, and one or more of these constituent layers are: (a) a crystal structure that changes from a granular crystal structure to a vertically elongated crystal structure; A) a crystal structure that changes from a granular crystal structure to a vertically-grown crystal structure, further from this vertically-grown crystal structure to a granular crystal structure, (c) a crystal structure that changes from a vertically-grown crystal structure to a granular crystal structure, and (a) to (c) above. A cutting tool made of a surface-coated titanium carbonitride-based cermet having excellent chipping resistance, characterized in that the cutting tool has one or more crystal structures.
して相対的に高い表面部を有する炭窒化チタン基サーメ
ット基体の表面に、硬質被覆層を０．５〜２０μｍの平
均層厚で形成してなる表面被覆炭窒化チタン基サーメッ
ト製切削工具において、 上記硬質被覆層を、炭窒化チタンの単層または２層以上
の積層で構成すると共に、これら構成層のうちの１層ま
たは２層以上を、 （ａ） 粒状結晶組織から縦長成長結晶組織へ変る結晶
構造、 （ｂ） 粒状結晶組織から縦長成長結晶組織へ、さらに
この縦長成長結晶組織から粒状結晶組織へ変る結晶構
造、 （ｃ） 縦長成長結晶組織から粒状結晶組織へ変る結晶
構造、 上記（ａ）〜（ｃ）のうちのいずれか、または２種以上
の結晶構造としたことを特徴とする耐チッピング性にす
ぐれた表面被覆炭窒化チタン基サーメット製切削工具。2. A hard coating layer having an average layer thickness of 0.5 to 20 μm is formed on the surface of a titanium carbonitride-based cermet substrate having a surface portion in which the content of a binder phase forming component is relatively high as compared with the inside of the substrate. In the surface-coated titanium carbonitride-based cermet cutting tool formed by the above method, the hard coating layer is constituted by a single layer of titanium carbonitride or a laminate of two or more layers, and one or two of these constituent layers are formed. (A) a crystal structure that changes from a granular crystal structure to a vertically-grown crystal structure, (b) a crystal structure that changes from a granular crystal structure to a vertically-grown crystal structure, and further from this vertically-grown crystal structure to a granular crystal structure; A surface coating excellent in chipping resistance, characterized in that the crystal structure changes from a vertically grown crystal structure to a granular crystal structure, or any one of the above (a) to (c) or two or more crystal structures. Charcoal Titanium-based cermet cutting tool made of.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4235265A JP2932853B2 (en) | 1992-08-11 | 1992-08-11 | Surface coated titanium carbonitride based cermet cutting tool with excellent chipping resistance |
| US08/073,328 US5436071A (en) | 1990-01-31 | 1993-06-08 | Cermet cutting tool and process for producing the same |
| US08/408,691 US5589223A (en) | 1990-01-31 | 1995-03-21 | Process for producing cermet cutting tools having both longitudinal and granular crystal structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4235265A JP2932853B2 (en) | 1992-08-11 | 1992-08-11 | Surface coated titanium carbonitride based cermet cutting tool with excellent chipping resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0657429A JPH0657429A (en) | 1994-03-01 |
| JP2932853B2 true JP2932853B2 (en) | 1999-08-09 |
Family
ID=16983533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4235265A Expired - Lifetime JP2932853B2 (en) | 1990-01-31 | 1992-08-11 | Surface coated titanium carbonitride based cermet cutting tool with excellent chipping resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2932853B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5652045A (en) * | 1994-10-20 | 1997-07-29 | Mitsubishi Materials Corporation | Coated tungsten carbide-based cemented carbide blade member |
| USRE43387E1 (en) * | 1995-10-27 | 2012-05-15 | TDY Industries, LLC | Anchored oxide coatings on hard metal cutting tools |
| US6395379B1 (en) * | 1996-09-03 | 2002-05-28 | Balzers Aktiengesellschaft | Workpiece with wear-protective coating |
| US7581906B2 (en) | 2004-05-19 | 2009-09-01 | Tdy Industries, Inc. | Al2O3 ceramic tools with diffusion bonding enhanced layer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2876130B2 (en) * | 1989-05-19 | 1999-03-31 | 京セラ株式会社 | Coated cutting tool |
| JPH0728146B2 (en) * | 1989-08-11 | 1995-03-29 | 富士通株式会社 | Mounting structure of printed wiring board |
-
1992
- 1992-08-11 JP JP4235265A patent/JP2932853B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0657429A (en) | 1994-03-01 |
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