JPH0765183B2 - Coated Cemented Carbide for Interrupted Cutting - Google Patents
Coated Cemented Carbide for Interrupted CuttingInfo
- Publication number
- JPH0765183B2 JPH0765183B2 JP1282689A JP28268989A JPH0765183B2 JP H0765183 B2 JPH0765183 B2 JP H0765183B2 JP 1282689 A JP1282689 A JP 1282689A JP 28268989 A JP28268989 A JP 28268989A JP H0765183 B2 JPH0765183 B2 JP H0765183B2
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- coated cemented
- titanium
- carbide
- coating
- 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
Links
- 238000005520 cutting process Methods 0.000 title claims description 37
- 239000000463 material Substances 0.000 claims description 44
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 239000010936 titanium Substances 0.000 claims description 17
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 13
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 10
- 239000002356 single layer Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 4
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 3
- 238000005524 ceramic coating Methods 0.000 claims description 2
- FOZHTJJTSSSURD-UHFFFAOYSA-J titanium(4+);dicarbonate Chemical compound [Ti+4].[O-]C([O-])=O.[O-]C([O-])=O FOZHTJJTSSSURD-UHFFFAOYSA-J 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 14
- 238000003801 milling Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 229910052715 tantalum Inorganic materials 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Chemical Vapour Deposition (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、切削工具用材料の中でもフライス，エンドミ
ル，ドリルのような回転切削工具、又は旋削加工のよう
な被削材が回転する場合においても被削材に溝が付与さ
れていて、切削中に被削材と工具の切刃が被削材の溝の
部分で瞬間的に接触しない状態が生じた後、再度切刃が
被削材に切込んで行くような切削加工用に適する断続切
削用被覆超硬合金に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a case where a rotary cutting tool such as a milling cutter, an end mill, a drill, or a work material such as a turning machine rotates among materials for a cutting tool. Groove is added to the work material, and during cutting, the cutting edge of the work material and the cutting edge of the tool do not momentarily contact at the groove part of the work material, and then the cutting edge is cut again. The present invention relates to a coated cemented carbide for intermittent cutting, which is suitable for cutting such as cutting into.
（従来の技術） 被覆超硬合金は、超硬合金の基材の表面に被膜を形成し
てなるもので、基材の材料としては、一般的には炭化タ
ングステンと周期律表4a,5a,6a族金属の炭化物，炭窒化
物及びこれらの相互固溶体の中の少なくとも１種の立方
晶系化合物とからなる硬質相と、残りCoを主成分とする
結合相とでなる超硬合金が多用されている。(Prior Art) A coated cemented carbide is one in which a coating is formed on the surface of a cemented carbide base material, and the material of the base material is generally tungsten carbide and periodic table 4a, 5a, Cemented carbide consisting of a hard phase consisting of carbides, carbonitrides of group 6a metals and at least one cubic compound in the mutual solid solution of these, and a binder phase containing the remaining Co as the main component is often used. ing.
ところが最近、被膜超硬合金がフライス加工用に多用さ
れる傾向となり、フライス加工の場合、断続切削に相当
し、特に鋳鉄をフライス加工する場合には工具の切刃が
微小チッピングを起しやすく、又被膜に切粉が圧着分離
して欠損が誘発されることから被膜超硬合金の強度を高
める必要が生じている。However, recently, the coated cemented carbide tends to be frequently used for milling, in the case of milling, it corresponds to intermittent cutting, and particularly when milling cast iron, the cutting edge of the tool easily causes minute chipping, Further, since chips are separated from the coating film by pressure bonding to induce defects, it is necessary to increase the strength of the cemented carbide film.
（発明が解決しようとする問題点） 従来の被膜超硬合金は、大体１〜４μｍの炭化タングス
テンと１μｍ以下の立方晶系化合物とからなり、炭化タ
ングステンに比べて立方晶系化合物を微細にしてなる基
材で、基材の硬質相の平均粒径としても1.5〜2.5μｍ程
度のものが用いられており、このために、特にフライス
の切削加工用として用いると、切刃に微小チッピングが
生じやすいこと、及び被膜に切粉が圧着分離しやすいこ
とから刃先欠損が誘発されて安定な性能が得られなく、
しかも短寿命であるという問題がある。(Problems to be Solved by the Invention) A conventional coated cemented carbide is composed of approximately 1 to 4 μm of tungsten carbide and 1 μm or less of a cubic crystal compound, and the cubic crystal compound is made finer than tungsten carbide. The average particle diameter of the hard phase of the base material is about 1.5 to 2.5 μm. Therefore, when it is used especially for cutting of milling cutters, minute chipping occurs on the cutting edge. It is easy and the chips are easily pressure-bonded and separated from the coating, leading to damage to the cutting edge and stable performance cannot be obtained.
Moreover, there is a problem that the life is short.
本発明は、上述のような問題点を解決したもので、具体
的には、基材と被膜との付着性を高め、基材の耐摩耗性
及び耐欠損性を高めた断続切削用被覆超硬合金の提供を
目的とするものである。The present invention solves the above-mentioned problems, and more specifically, it improves the adhesion between the base material and the coating film, and improves the wear resistance and fracture resistance of the base material. The purpose is to provide a hard alloy.
（問題点を解決するための手段） 本発明者らは、超硬合金の表面に化学蒸着法（CVD法）
でもって被膜を形成してなる被覆超硬合金を用いて鋳鉄
のフライス切削を行い、断続切削用工具として最適な被
覆超硬合金の検討を行っていた所、 第１に、断続切削工具としては、連続切削工具に比べて
被膜の厚さを薄くする必要があり、薄い被膜の場合、被
膜が摩耗して基材の露出が早くなり、基材と被削材とが
直接接触する部分が生じることから、基材自体の耐摩耗
性，耐溶着性を高める必要があるという知見を得た。(Means for Solving Problems) The present inventors have developed a chemical vapor deposition method (CVD method) on the surface of a cemented carbide.
By milling cast iron using a coated cemented carbide formed with a coating, the optimum coated cemented carbide as a tool for interrupted cutting was examined. First, as an interrupted cutting tool, , It is necessary to reduce the thickness of the coating compared to continuous cutting tools. In the case of a thin coating, the coating wears and the exposure of the base material becomes faster, and there is a part where the base material and the work material come into direct contact. Therefore, we have found that it is necessary to improve the wear resistance and welding resistance of the base material itself.
第２に、被膜への切粉の溶着又は圧着、及び切刃のチッ
ピングは、被膜の表面精度に関係し、被膜の表面精度は
基材の表面状態に関係すること、さらに被膜と基材との
付着性も基材の表面状態に関係するという知見を得た。Secondly, the welding or pressure bonding of chips to the coating and the chipping of the cutting edge are related to the surface accuracy of the coating, and the surface accuracy of the coating is related to the surface condition of the base material. It has been found that the adhesiveness of is also related to the surface condition of the substrate.
第３に、基材の耐摩耗性及び耐溶着性を高めるには、基
材中の硬質相と結合相との比率の調整と、硬質相を微細
にすることが好ましく、被膜の表面精度を高めること、
及び被膜と基材との付着性を高めるには結合相量をでき
るだけ少なくし、かつ硬質相を微細にすることが好まし
いという知見を得た。Thirdly, in order to improve the wear resistance and the welding resistance of the base material, it is preferable to adjust the ratio of the hard phase and the binder phase in the base material and to make the hard phase fine, thereby improving the surface accuracy of the coating. To increase,
In addition, it was found that it is preferable to reduce the amount of the binder phase as much as possible and to make the hard phase fine in order to enhance the adhesion between the coating and the substrate.
これら第1,第２及び第３の知見に基づいて、本発明を完
成するに至ったものである。The present invention has been completed based on these first, second and third findings.
すなわち、本発明の断続切削用被覆超硬合金は、炭化タ
ングステン、又は炭化タングステンと周期律表4a,5a,6a
族金属の炭化物，炭窒化物及びこれらの相互固溶体の中
の少なくとも１種の立方晶系化合物とからなる硬質相85
〜97重量％と残りCoを主成分とする結合相と不可避不純
物とからなる超硬合金の基材の表面にセラミックスの被
膜を単層又は多層に形成してなる被覆超硬合金であっ
て、該基材中の該硬質相が平均粒系１μｍ以下でなり、
該被膜が炭化チタン，窒化チタン，炭窒酸化チタンの中
の少なくとも１種の単層又は多層と、酸化アルミニウム
の単層とを組合せてなることを特徴とするものである。That is, the coated cemented carbide for interrupted cutting of the present invention is tungsten carbide, or tungsten carbide and periodic table 4a, 5a, 6a.
Hard phase consisting of carbides, carbonitrides of group metals and at least one cubic compound in their mutual solid solutions 85
A coated cemented carbide formed by forming a ceramic coating in a single layer or multiple layers on the surface of a cemented carbide base material consisting of a binder phase containing Co as a main component and inevitable impurities in an amount of up to 97% by weight, The hard phase in the base material has an average grain size of 1 μm or less,
It is characterized in that the coating is formed by combining at least one kind of single layer or multi-layers of titanium carbide, titanium nitride and titanium oxycarbonitride with a single layer of aluminum oxide.
本発明の断続切削用被覆超硬合金における基材は、硬質
相と結合相と不可避不純物とからなり、この内、硬質相
が炭化タングステンのみからなる場合、又は炭化タング
ステンと立方晶型（NaCl型）の結晶構造を有する立方晶
系化合物とからなる場合があり、この立方晶系化合物と
しては、具体的には、例えばTiC,ZrC,HfC,NbC,TaC,（T
i,Ta）C,（Ti,Nb）C,（Ti,W）C,（Ti,Ta,W）C,（Ti,Ta,
Nb,W）C,Ti（C,N），（Ti,Ta）（C,N）などを代表例と
して挙げることができる。これらの硬質相の内、硬質相
が立方晶系化合物20wt％以上と残り炭化タングステンと
からなる場合が、特に好ましいことである。この硬質相
は、平均粒径で１μｍ以下であることが必要であり、粗
粒の炭化タングステンの硬質相を含有している場合は、
最大粒径２μｍ以下で、かつ平均粒径１μｍ以下である
ことが好ましく、より好ましくは平均粒径0.7μｍ以下
であることである。また、立方晶系化合物の硬質相は、
できるだけ微細で均一に分散していることが好ましく、
粗粒の立方晶系化合物を含有している場合は、最大粒系
１μｍ以下であることが好ましいことである。The substrate in the coated cemented carbide for interrupted cutting of the present invention consists of a hard phase, a binder phase and inevitable impurities, of which, when the hard phase consists of tungsten carbide only, or a tungsten carbide and cubic (NaCl type) ) May be composed of a cubic compound having a crystal structure of, for example, as the cubic compound, specifically, for example, TiC, ZrC, HfC, NbC, TaC, (T
i, Ta) C, (Ti, Nb) C, (Ti, W) C, (Ti, Ta, W) C, (Ti, Ta,
Nb, W) C, Ti (C, N), (Ti, Ta) (C, N), etc. can be mentioned as typical examples. Of these hard phases, the case where the hard phase is composed of 20 wt% or more of the cubic compound and the remaining tungsten carbide is particularly preferable. This hard phase needs to have an average grain size of 1 μm or less, and when it contains a coarse grain hard phase of tungsten carbide,
The maximum particle size is preferably 2 μm or less and the average particle size is 1 μm or less, more preferably the average particle size is 0.7 μm or less. Further, the hard phase of the cubic system compound,
It is preferable that they are dispersed as finely and uniformly as possible,
When a coarse-grained cubic compound is contained, the maximum grain size is preferably 1 μm or less.
これらの硬質相の他に、基材を構成しているもう一つの
結合相は、Coのみからなる場合、又は少なくとも50wt％
のCoと残り、例えばNi,Fe,Cr,W,Mo,Ta,Nb,V,Ti,Zr,Hf,M
n,Cuなどの金属元素の含有してなる場合である。これら
の金属元素の内Ni,Fe,W,Mo,Crなどは製造工程中に不可
避不純物として微量混入してくる場合もある。In addition to these hard phases, another binder phase that constitutes the base material is composed of Co only, or at least 50 wt%
Co and the rest, such as Ni, Fe, Cr, W, Mo, Ta, Nb, V, Ti, Zr, Hf, M
This is a case where a metal element such as n or Cu is contained. Of these metal elements, Ni, Fe, W, Mo, Cr and the like may be mixed in a trace amount as unavoidable impurities during the manufacturing process.
この基材中の硬質相が85wt％未満になると、相対的に結
合相が15wt％を超えて多くなり、結合相が15wt％を超え
て多くなると、結合相の巾（ミーンフリーパス）が広く
なり、その結果被膜の表面精度が低下し、耐チッピング
性及び耐欠損性を劣下させる。逆に、硬質相が97wt％を
超えて多くなると、相対的に結合相が3wt％未満とな
り、結合相が3wt％未満になると、基材自体の強度の低
下が著しくなる。このために基材中の硬質相は、85〜97
wt％と定めたものである。If the hard phase in this substrate is less than 85 wt%, the relative amount of the binder phase exceeds 15 wt%, and if the amount of the binder phase exceeds 15 wt%, the width of the binder phase (mean free path) becomes wide. As a result, the surface accuracy of the coating film is lowered, and the chipping resistance and chipping resistance are deteriorated. On the other hand, when the hard phase exceeds 97 wt% and is large, the binder phase is relatively less than 3 wt%, and when the binder phase is less than 3 wt%, the strength of the base material itself is significantly reduced. For this reason, the hard phase in the substrate is 85 to 97.
It is defined as wt%.
以上のような構成でなる基材の内、基材の硬さが91.0HR
A以上で、かつ破壊靱性値が9.5MN/m3/2以上でなる場合
は、特に鋳鉄のフライス切削用被覆超硬合金として寿命
が向上することから好ましいことである。Among the base made in the above configuration, the hardness of the substrate 91.0H R
When the fracture toughness is A or more and the fracture toughness value is 9.5 MN / m 3/2 or more, it is preferable because the life is improved as a coated cemented carbide for milling cutting of cast iron.
本発明の断続切削用被覆超硬合金における被膜の材質
は、炭化チタン，窒化チタン，炭窒化チタン，炭酸化チ
タン，窒酸化チタン，炭窒酸化チタンの中の少なくとも
１種の単層又は多層と、酸化アルミニウムの単層とを組
合わせてなる場合であり、特に、基材の表面に接合する
側の下層を炭化チタン，炭窒化チタンの単層又は二層と
し、中間層を酸化アルミニウムとし、上層を窒化チタン
にすると、被膜と基材との耐剥離性，被膜の耐摩耗性及
び耐溶着性、並びに被膜の変色むらもなく、鋳鉄のフラ
イス加工用工具として著しくすぐれた被覆超硬合金とな
る。この被膜の厚さは、被膜の材質，その組合わせ，又
は工具形状や用途により異なるが、本体１〜10μｍから
なり、特に耐衝撃性を重要視する場合には、被膜の総厚
が２〜５μｍにすることが好ましいことである。The material of the coating in the coated cemented carbide for intermittent cutting of the present invention is at least one single layer or a multilayer of titanium carbide, titanium nitride, titanium carbonitride, titanium carbonate, titanium oxynitride, and titanium oxycarbonitride. , A case of combining with a single layer of aluminum oxide, in particular, the lower layer on the side to be bonded to the surface of the base material is a single layer or two layers of titanium carbide, titanium carbonitride, the intermediate layer is aluminum oxide, When titanium nitride is used as the upper layer, the coated cemented carbide is extremely excellent as a tool for milling cast iron, without peeling resistance between the coating and the base material, wear resistance and welding resistance of the coating, and even discoloration of the coating. Become. The thickness of this coating varies depending on the material of the coating, its combination, tool shape and application, but consists of the main body of 1 to 10 μm. If impact resistance is important, the total thickness of the coating is 2 to It is preferable that the thickness is 5 μm.
本発明の断続切削用被覆超硬合金は、まず基材を従来の
粉末冶金法を応用して作製し、焼結後の焼肌面の基材、
又は表面をサンドブラスト，ショットピーニング，研摩
などで前処理を施した基材を準備し、次いて基材表面を
洗浄後、従来の熱CVD法やブラズマCVD法などで基材の表
面に被膜を形成するという方法で作製することができ
る。The coated cemented carbide for interrupted cutting of the present invention is produced by first applying a conventional powder metallurgy method to a base material, and a base material for a burnt surface after sintering,
Alternatively, prepare a base material whose surface has been pretreated by sandblasting, shot peening, polishing, etc., then wash the base material surface, and then form a film on the base material surface by the conventional thermal CVD method or plasma CVD method. It can be manufactured by the method.
（作用） 本発明の断続切削用被覆超硬合金は、基材を構成してい
る硬質相と結合相との組成成分が被膜超硬合金としての
耐摩耗性及び強度を最適にする作用をし、基材の組成成
分及び硬質相の粒径が基材のミーンフリーパスを小さく
し、その結果、基材の表面における被膜の成長を均一化
させ、被膜の表面精度を向上させるという作用としてい
るものである。(Function) In the coated cemented carbide for interrupted cutting of the present invention, the composition components of the hard phase and the binder phase constituting the base material function to optimize wear resistance and strength as the coated cemented carbide. The composition component of the base material and the particle size of the hard phase reduce the mean free path of the base material, and as a result, uniformize the growth of the coating film on the surface of the base material and improve the surface accuracy of the coating film. It is a thing.
実施例 平均粒径1.5〜2.5μｍのWC,平均粒径１μｍ以下の（Ti,
Ta,W）C,TiC,TaC及び平均粒径1.5μｍのCoの各粉末を用
いて、所定量に配合し、超硬合金製ボールとアセトンと
共にステンレス製容器でもって湿式混合粉砕及び乾燥
後、1t/cm2の圧力で所定の成形体とし、次いで1380〜14
60℃で焼結して第１表に示した各種の基材を得た。これ
ら基材を従来の熱CVD法でもって基材温度1000℃,TiCl4
−CH4−H2,TiCl4−CH4−N2−H2,AlCl3−CO2−H2,TiCl4
−N2−H2と混合ガス雰囲気を切換えて処理し、基材の表
面にTiCの第１層とTi（C,N）の第２層とAl2O3の第３層
とTiNの第４層を順次形成させて、第２表に示した本発
明品１〜６及び比較品１〜８を得た。Example WC having an average particle size of 1.5 to 2.5 μm, and having an average particle size of 1 μm or less (Ti,
Ta, W) C, TiC, TaC and Co powder having an average particle size of 1.5 μm are mixed in a predetermined amount, and wet mixed and ground in a stainless steel container with cemented carbide balls and acetone, and then dried. a predetermined molded body at a pressure of 1t / cm 2, then 1380-14
It was sintered at 60 ° C. to obtain various base materials shown in Table 1. These base materials were processed by the conventional thermal CVD method at a base material temperature of 1000 ° C, TiCl 4
--CH 4 --H 2 , TiCl 4 --CH 4 --N 2 --H 2 , AlCl 3 --CO 2 --H 2 , TiCl 4
-N 2 -H 2 and mixed gas atmosphere are switched and processed, and the first layer of TiC, the second layer of Ti (C, N), the third layer of Al 2 O 3 and the third layer of TiN are formed on the surface of the base material. Four layers were sequentially formed to obtain inventive products 1 to 6 and comparative products 1 to 8 shown in Table 2.
こうして得た本発明品１〜６及び比較品１〜８を金属顕
微鏡，走査型電子顕微鏡，硬度計でもって調べて、その
結果を第１表に併記した。尚、このときの被膜の厚さ
は、第１層：第２層：第３層：第４層：≒4:2:1:1から
なるものである。また、硬質相の平均粒径は、フルマン
の方式（JOURNAL OF METALS,MARCH,1953,447−452記
載）を主体にして求めたものである。The products 1 to 6 of the present invention and the comparative products 1 to 8 thus obtained were examined with a metallographic microscope, a scanning electron microscope and a hardness tester, and the results are also shown in Table 1. The thickness of the coating film at this time is composed of the first layer: the second layer: the third layer: the fourth layer: ≈ 4: 2: 1: 1. The average particle size of the hard phase is determined mainly by the Fulman method (described in JOURNAL OF METALS, MARCH, 1953, 447-452).
次に、本発明品１〜６及び比較品１〜７を用いて、下記
の（Ａ）条件及び（Ｂ）条件でもって切削試験を行い、
その結果を第１表に併記した。Next, a cutting test was conducted under the following conditions (A) and (B) using the present invention products 1 to 6 and the comparative products 1 to 7,
The results are also shown in Table 1.
（Ａ） フライスによる切削試験（乾式） 被削材:FCD 60（46×200mm角材） 工具形状:SNGN 120408 ホーニング0.1×（−20゜） 切削速度:150mm/min 切込み:2.0mm 送り:0.247mm/刃 切削時間:46×200mm面積を15pass 評価：平均逃げ面摩耗量（VB）mm （Ｂ） フライスによる切削試験（乾式） 被削材:FCD 35（46×200mm角材） 工具形状:SNGN 120408 ホーニング0.1×（−20゜） 切削速度:150mm/min 切込み:2.0mm 送り:0.247mm/刃 切削時間:46×200mm面積を15pass 評価：平均逃げ面摩耗量（VB）mm （発明の効果） 本発明の断続切削用被覆超硬合金は、従来の超硬合金に
相当する比較品に比べて、鋳鉄のフライス切削加工にお
いて、耐摩耗性で約２倍〜8.5倍も向上するという効果
があり、耐欠損性もすぐれているという効果がある。(A) Cutting test by milling (dry type) Work material: FCD 60 (46 × 200mm square material) Tool shape: SNGN 120408 Honing 0.1 × (−20 °) Cutting speed: 150mm / min Depth of cut: 2.0mm Feed: 0.247mm / Blade Cutting time: 15 passes over 46 x 200 mm area Evaluation: Average flank wear amount (V B ) mm (B) Cutting test by milling (dry type) Work material: FCD 35 (46 x 200 mm square material) Tool shape: SNGN 120408 Honing 0.1 × (−20 °) Cutting speed: 150mm / min Depth of cut: 2.0mm Feed: 0.247mm / blade Cutting time: 46 × 200mm Area 15pass Evaluation: Average flank wear (V B ) mm (Effect of the Invention) The coated cemented carbide for interrupted cutting of the present invention is improved in wear resistance by about 2 to 8.5 times in the milling of cast iron as compared with the comparative product corresponding to the conventional cemented carbide. There is an effect that it does, and there is also an effect that the fracture resistance is excellent.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特公 昭60−5673（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Publication Sho 60-5673 (JP, B2)
Claims (4)
と周期律表4a,5a,6a族金属の炭化物，炭窒化物及びこれ
らの相互固溶体の中の少なくとも１種の立方晶系化合物
とからなる硬質相85〜97重量％と残りCoを主成分とする
結合相と不可避不純物とからなる超硬合金の基材の表面
にセラミックスの被膜を単層又は多層に形成してなる被
膜超硬合金において、該基材中の該硬質相が平均粒径１
μｍ以下でなり、該被膜が炭化チタン，窒化チタン，炭
窒化チタン，炭酸化チタン，窒酸化チタン，炭窒酸化チ
タンの中の少なくとも１種の単層又は多層と、酸化アル
ミニウムの単層とを組合わせてなることを特徴とする断
続切削用被覆超硬合金。1. A hard phase comprising tungsten carbide, or tungsten carbide and at least one cubic compound of carbides, carbonitrides of metals of groups 4a, 5a and 6a of the Periodic Table and their mutual solid solutions. ~ 97% by weight and the remainder is a coated cemented carbide formed by forming a ceramic coating in a single layer or multiple layers on the surface of a cemented carbide substrate consisting of a binder phase containing Co as a main component and unavoidable impurities. The hard phase in the material has an average particle size of 1
μm or less, and the coating contains at least one monolayer or multilayer of titanium carbide, titanium nitride, titanium carbonitride, titanium carbonate, titanium oxynitride, and titanium oxycarbonitride, and a single layer of aluminum oxide. Coated cemented carbide for interrupted cutting characterized by being combined.
％以下と、残り炭化タングステンとからなることを特徴
とする特許請求の範囲第１項記載の断続切削用被覆超硬
合金。2. The coated cemented carbide for interrupted cutting according to claim 1, wherein the hard phase comprises 20% by weight or less of the cubic compound and the balance tungsten carbide.
破壊靱性値が9.5MN/m3/2以上であることを特徴とする特
許請求の範囲第１項又は第２項記載の断続切削用被覆超
硬合金。3. The substrate according to claim 1, wherein the substrate has a hardness of 91.0 H R A or more and a fracture toughness value of 9.5 MN / m 3/2 or more. A coated cemented carbide for intermittent cutting according to the item.
ることを特徴とする特許請求の範囲第１項，第２項又は
第３項記載の断続切削用被覆超硬合金。4. The coated cemented carbide for interrupted cutting according to claim 1, 2 or 3, wherein the coating has a total thickness of 2 to 5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1282689A JPH0765183B2 (en) | 1989-10-30 | 1989-10-30 | Coated Cemented Carbide for Interrupted Cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1282689A JPH0765183B2 (en) | 1989-10-30 | 1989-10-30 | Coated Cemented Carbide for Interrupted Cutting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03146677A JPH03146677A (en) | 1991-06-21 |
| JPH0765183B2 true JPH0765183B2 (en) | 1995-07-12 |
Family
ID=17655779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1282689A Expired - Lifetime JPH0765183B2 (en) | 1989-10-30 | 1989-10-30 | Coated Cemented Carbide for Interrupted Cutting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0765183B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE527348C2 (en) | 2003-10-23 | 2006-02-14 | Sandvik Intellectual Property | Ways to make a cemented carbide |
| SE529302C2 (en) * | 2005-04-20 | 2007-06-26 | Sandvik Intellectual Property | Ways to manufacture a coated submicron cemented carbide with binder phase oriented surface zone |
| EP2000236A4 (en) | 2006-03-28 | 2012-01-25 | Sumitomo Metal Ind | CUTTING TOOL AND METHOD FOR MANUFACTURING SAME |
| JP2013107143A (en) * | 2011-11-17 | 2013-06-06 | Osg Corp | Tool and method of manufacturing the same |
| CN104018017B (en) * | 2014-05-27 | 2016-02-24 | 南京航空航天大学 | The recovery of waste and old Ti (C, N) base metal-ceramic material and renovation process |
| MX2024006049A (en) * | 2021-11-20 | 2024-06-04 | Hyperion Materials & Tech Inc | Improved cemented carbides. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS605673A (en) * | 1983-06-23 | 1985-01-12 | Fuji Xerox Co Ltd | Facsimile equipment |
-
1989
- 1989-10-30 JP JP1282689A patent/JPH0765183B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03146677A (en) | 1991-06-21 |
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