JPH0222453A - Surface-treated tungsten carbide-base sintered hard alloy for cutting tool - Google Patents
Surface-treated tungsten carbide-base sintered hard alloy for cutting toolInfo
- Publication number
- JPH0222453A JPH0222453A JP17018588A JP17018588A JPH0222453A JP H0222453 A JPH0222453 A JP H0222453A JP 17018588 A JP17018588 A JP 17018588A JP 17018588 A JP17018588 A JP 17018588A JP H0222453 A JPH0222453 A JP H0222453A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- carbonitrides
- tungsten carbide
- coating layer
- hard alloy
- 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.)
- Granted
Links
- 229910052721 tungsten Inorganic materials 0.000 title claims description 8
- 239000000956 alloy Substances 0.000 title abstract description 7
- 229910045601 alloy Inorganic materials 0.000 title abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title 1
- 239000010937 tungsten Substances 0.000 title 1
- 239000011247 coating layer Substances 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 13
- 150000004767 nitrides Chemical class 0.000 claims abstract description 8
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- -1 carbonitrides Chemical class 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 3
- 239000002356 single layer Substances 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims description 21
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910002090 carbon oxide Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、被覆層の炭化タングステン（以下ＷＣで示
す）超超硬合金基体への密着性にすぐれ、特に高速切削
や、高送りおよび高切込みなどの重切削に切削工具とし
て用いた場合にも被覆層の剥離が著しく抑制され、すぐ
れた耐摩耗性を示す表面被覆ＷＣＣ超超硬合金関するも
のである。Detailed Description of the Invention [Field of Industrial Application] This invention has excellent adhesion of a coating layer to a tungsten carbide (hereinafter referred to as WC) cemented carbide substrate, and is particularly suitable for high-speed cutting, high feed, and high speed cutting. The present invention relates to a surface-coated WCC cemented carbide that exhibits excellent wear resistance and exhibits excellent wear resistance, with peeling of the coating layer being significantly suppressed even when used as a cutting tool for heavy cutting such as notching.
従来、一般に、鋼などの切削に切削工具として、結合相
形成成分としてのＣｏ、Ｎｌ、およびＦｅのうちの１種
以上＝４〜１５％、
を含有し、さらに必要に応じて、
分散相形成成分としてのＴｉ 、”ｒａ、Ｎｂ、および
Ｗの炭化物、窒化物、および炭窒化物、並びにこれらの
２種以上の固溶体（ただしＷの窒化物と炭窒化物は除き
、以下、これら全体を、（Ｔ１゜Ｔａ、Ｎｂ、Ｗ）Ｃ−
Ｎで示す）のうちの１種以上：０．５〜３０％、
を含有し、残りが同じく分散相形成成分としてのＷＣと
不可避不純物からなる組成（以下ｉｔ％、以下％は重量
％を示ず）を有するＷＣＣ超超硬合金基体表面に、化学
蒸着法（ＣＶＤ法）や物理蒸着法を用いて、Ｔｉ、Ｚｒ
、およびＨｆの炭化物、窒化物、炭窒化物、炭酸化物、
および炭窒酸化物、並びに酸化アルミニウム（以下、こ
れら全体を、（Ｔｉ、Ｚｒ、Ｈｆ’）Ｃ−Ｎ−０で示す
）のうちの１種の単層または２種以上の複層からなる被
覆層を０．５〜２０虜の平均層厚で形成してなる表面被
覆ＷＣＣ超超硬合金用いられている。Conventionally, cutting tools for cutting steel, etc., generally contain 4 to 15% of one or more of Co, Nl, and Fe as binder phase forming components, and further, if necessary, disperse phase forming. Carbides, nitrides, and carbonitrides of Ti, ra, Nb, and W as components, and solid solutions of two or more of these (excluding nitrides and carbonitrides of W, hereinafter referred to in their entirety as (T1゜Ta, Nb, W)C-
A composition containing 0.5 to 30% of one or more of the following (indicated by N): 0.5 to 30%, with the remainder also consisting of WC as a dispersed phase forming component and unavoidable impurities (hereinafter "it%", hereinafter "%" indicates weight%). Using chemical vapor deposition (CVD) or physical vapor deposition, Ti, Zr and
, and Hf carbides, nitrides, carbonitrides, carbonates,
and carbonitride oxide, and aluminum oxide (hereinafter, all of these will be referred to as (Ti, Zr, Hf')C-N-0). A surface-coated WCC cemented carbide formed by forming layers with an average layer thickness of 0.5 to 20 mm is used.
しかし、近年の切削の高速化および省力化に伴い、高速
切削や重切削を余儀なくされつつあるが、上記の従来表
面被覆ＷＣＣ超超硬合金場合、ＷＣＣ超超硬合金基体表
面対する被覆層の付着強度が十分でないために、これを
高速切削や重切削に用いると被覆層が剥離し易く、この
剥離が原因で摩耗が促進するようになって満足な使用寿
命を示さないのが現状である。However, as cutting speeds and labor savings have increased in recent years, high-speed cutting and heavy-duty cutting have become necessary. Due to insufficient strength, the coating layer tends to peel off when used for high-speed cutting or heavy cutting, and this peeling accelerates wear, resulting in an unsatisfactory service life.
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ＷＣＣ超超硬合金着目し、被覆層の基体表
面に対する付着強度を向上せしめるべく研究を行なった
結果、通常、ＷＣＣ超超硬合金基体、所定の配合組成を
もった圧粉体を、真空中で所定の焼結温度に昇温し、同
じく真空中で焼結温度に所定時間保持することによって
製造され、この場合製造されたＷＣＣ超超硬合金基体、
表面から内部まで均一な組織をもつが、これを上記の通
り真空焼結するに際して、真空雰囲気での昇温時に所定
の温度に昇温した時点で雰囲気を、メタン分解ガスやア
ンモニア分解ガス、あるいはＣＯガスなどの席次雰囲気
とし、この所定温度での席次雰囲気に所定時間保持する
と、焼結後のＷＣＣ超超硬合金基体表面部には、内部か
ら表面に向って、Ｃｏ含有量が連続的に減少するＣＯａ
度勾配、並びに硬さが連続的に増加する硬さ勾配をもっ
た表面硬質層が形成されるようになり、この状態で、Ｃ
ＶＤ法やＰＶＤ法により被覆層を形成すると、この被覆
層の基体表面に対する密着性は著しく強固なものとなり
、これを高速切削や重切削に切削工具として用いると、
被覆層の剥離は著しく抑制されるようになることから、
すぐれた耐摩耗性を長期に亘って発揮し、使用寿命の延
命化が可能になるという知見を得たのである。Therefore, from the above-mentioned viewpoint, the present inventors focused on the above-mentioned conventional surface-coated WCC cemented carbide and conducted research to improve the adhesion strength of the coating layer to the substrate surface. It is manufactured by raising the temperature of a powder compact with a cemented carbide base and a predetermined composition to a predetermined sintering temperature in a vacuum, and then holding it at the sintering temperature for a predetermined time in a vacuum. WCC cemented carbide substrate,
It has a uniform structure from the surface to the inside, but when vacuum sintering it as described above, when the temperature is raised to a predetermined temperature in a vacuum atmosphere, the atmosphere is changed to methane decomposition gas, ammonia decomposition gas, or When a predetermined atmosphere such as CO gas is used and the predetermined temperature is maintained in the predetermined atmosphere for a predetermined period of time, the Co content continuously increases from the inside to the surface of the WCC cemented carbide base after sintering. Decreasing COa
A hard surface layer with a hardness gradient and a hardness gradient in which the hardness increases continuously is formed, and in this state, C
When a coating layer is formed using the VD method or PVD method, the adhesion of this coating layer to the substrate surface becomes extremely strong, and when this coating layer is used as a cutting tool for high-speed cutting or heavy cutting,
Peeling of the coating layer is significantly suppressed, so
They found that it exhibits excellent wear resistance over a long period of time, making it possible to extend its service life.
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、
結合相形成成分としてのＣｏ、Ｎｉ、およびＦｅのうち
の１種以上：４〜１５％、
を含有し、さらに必要に応じて、
分散相形成成分としての（Ｔｉ、Ｔａ、Ｎｂ、Ｗ）Ｃ−
Ｈのうちの１種以上＝０．５〜３０％、を含有し、残り
が同じく分散相形成成分としてのＷＣと不可避不純物か
らなる組成を有し、かつ表面部に、内部から表面に向っ
て、Ｃｏ含有量が連続的に減少するＣｏ濃度勾配、並び
に硬さが連続的に増加する硬さ勾配をもった表面硬質層
を形成してなるＷＣＣ超超硬合金基体表面に、（Ｔ１゜
Ｚｒ、Ｈｒ）Ｃ−Ｎ−０のうちの１種の単層または２種
以上の複層からなる被覆層を０．５〜２０ｕ３の平均層
厚で形成してなる切削工具用表面波ｇｗｃ基超硬合金、
に特徴を有するものである。This invention was made based on the above findings, and contains 4 to 15% of one or more of Co, Ni, and Fe as bonding phase forming components, and further contains, if necessary, (Ti, Ta, Nb, W)C- as a dispersed phase forming component
One or more of H = 0.5 to 30%, and the rest has a composition consisting of WC as a dispersed phase forming component and unavoidable impurities, and in the surface part, from the inside to the surface. , on the surface of the WCC cemented carbide substrate formed by forming a surface hard layer having a Co concentration gradient in which the Co content continuously decreases and a hardness gradient in which the hardness continuously increases. , Hr) Surface wave GWC base material for cutting tools formed by forming a coating layer consisting of one type of single layer or two or more types of multiple layers of C-N-0 with an average layer thickness of 0.5 to 20u3. It is a hard metal with the following characteristics.
つぎに、この発明の表面被覆ＷＣＣ超超硬合金おいて、
上記の通りに数値限定した理由を説明する。Next, in the surface-coated WCC cemented carbide of this invention,
The reason for limiting the numerical values as above will be explained.
（ａ） 基体における結合相形成成分の含有量これら
の成分には、分散相と強固に結合し、基体の強度および
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１５％を越えると、基体の耐摩耗性が低下するように
なることから、その含有量を４〜１５％と定めた。(a) Content of binder phase-forming components in the substrate These components have the effect of strongly bonding with the dispersed phase and improving the strength and toughness of the substrate, but if the content is less than 4%, this effect will not be achieved. The desired effect could not be obtained, and if the content exceeded 15%, the wear resistance of the substrate would decrease, so the content was set at 4 to 15%.
（ｂ） 基体における（Ｔｉ、Ｔａ、Ｎｂ、Ｗ）Ｃ−
Ｎの含有量
これらの成分には、基体の硬さを高めて、耐摩耗性を向
上させる作用があるので、必要に応じて含有させるが、
その含有量が０．５％未満では所望の耐摩耗性向上効果
が得られず、一方その含有量が３０％を越えると基体の
靭性が低下するようになることから、その含有量を０．
５〜３０％と定めた。(b) (Ti, Ta, Nb, W)C- in the substrate
Content of N These components have the effect of increasing the hardness of the base and improving wear resistance, so they may be included as necessary.
If the content is less than 0.5%, the desired effect of improving wear resistance cannot be obtained, while if the content exceeds 30%, the toughness of the substrate will decrease.
It was set at 5-30%.
（ｃ） 被覆層の平均層厚
その平均層厚が０．５−未満では、被覆層形成に伴なう
所望の耐摩耗性向上効果が得られず、一方その平均層厚
が２０１１ｎを越えると、耐欠損性が低下し、チッピン
グや欠けが発生し易（なることから、その平均層厚を０
．５〜２０コと定めた。(c) Average layer thickness of the coating layer If the average layer thickness is less than 0.5-n, the desired effect of improving wear resistance accompanying the formation of the coating layer cannot be obtained, while on the other hand, if the average layer thickness exceeds 2011n. , the chipping resistance is reduced, and chipping and chipping are likely to occur (this is why the average layer thickness is reduced to 0).
．． It was set at 5 to 20 pieces.
なお、この発明の表面被覆ＷＣＣ超超硬合金おける表面
硬質層のＣｏ濃度勾配および硬さ濃度勾配は、圧粉体の
配合組成や、焼結時の昇温過程における席次雰囲気の温
度、保持時間、および圧力などによって変化するので、
これらを制御することにより所定の勾配に調整すること
ができる。Note that the Co concentration gradient and hardness concentration gradient of the surface hard layer in the surface-coated WCC cemented carbide of the present invention depend on the composition of the green compact, the temperature of the secondary atmosphere during the heating process during sintering, and the holding time. , and changes depending on pressure, etc.
By controlling these, it is possible to adjust to a predetermined slope.
つぎに、この発明の表面被覆ＷＣＣ超超硬合金実施例に
より具体的に説明する。Next, the surface-coated WCC cemented carbide of the present invention will be specifically explained using examples.
原料粉末として、いずれも１〜５．５μｍの範囲内の平
均粒径を有するＷＣ粉末、各種の（Ｔｉ、Ｔａ。As raw material powders, WC powders, various types of (Ti, Ta,
Ｎｂ、Ｗ）Ｃ−Ｎ粉末、このうち、（Ｔｉ、Ｔａ、Ｎｂ
。Nb, W)C-N powder, among which (Ti, Ta, Nb
.
Ｗ）ＣＮはＴｉＣ／ＴｉＮ／ＴａＣ／ＮｂＣ／ＷＣ＝１
５／１５．／２７／ ３ ／４０の組成、（Ｔｉ、Ｔａ
、Ｗ）ＣはＴ ｉ Ｃ／Ｔａ Ｃ／ＷＣ−３０／２０１
５０の組成、そして（Ｔｉ、Ｗ）ＣはＴ ｉ Ｃ／ＷＣ
−３０／７０の組成（以上重量化）をもち、さらにＣｏ
粉末、Ｎｉ粉末、およびＦｅ粉末を用意し、これら原料
粉末をそれぞれ第１表に示される配合組成に配合し、ボ
ールミルにて７２時時間式混合し、乾燥した後、ＬＯｋ
ｇ／μｍの圧力にて圧粉体にプレス成形し、この圧粉体
を、５ Ｘ １Ｏ−２ｔｏｒｒの真空中で昇温し、１２
６０〜１３００℃の範囲内の所定の温度に昇温した時点
で、雰囲気を０．５ｔＯｒｒのメタン分解ガス雰囲気か
らなる席次雰囲気にかえ、この席次雰囲気に１５分間保
持した後、再び昇温雰囲気を元の真空雰囲気に戻して、
１３８０〜１５００の範囲内の所定の焼結温度まで昇温
し、同じ真空雰囲気中で、前記焼結温度に３０分間保持
した後、冷却することからなる焼結条件にて焼結して、
実質的に配合組成と同一の成分組成を有し、かつ表面部
にＣＯａ度勾配および硬さ勾配をもった表面硬質層が形
成されたＷＣＣ超超硬合金基体製造し、ついでこれらの
基体の表面に、化学蒸着法にて、同じく第１表に示され
る組成および平均層厚の被覆層を形成するこ＼
とにより本発明表面被覆ＷＣＣ超超硬合金以下本発明被
覆超硬合金という）１〜１８をそれぞれ製造した。W) CN is TiC/TiN/TaC/NbC/WC=1
5/15. /27/ 3 /40 composition, (Ti, Ta
, W) C is T i C/Ta C/WC-30/201
50 composition, and (Ti, W)C is T i C/WC
- has a composition of 30/70 (weighted above), and also Co
Powder, Ni powder, and Fe powder were prepared, and these raw material powders were blended into the composition shown in Table 1, mixed for 72 hours in a ball mill, dried, and then LOk
It was press-molded into a green compact at a pressure of g/μm, and the green compact was heated in a vacuum of 5 x 1O-2 torr to give a temperature of 12
When the temperature was raised to a predetermined temperature within the range of 60 to 1300°C, the atmosphere was changed to a partial atmosphere consisting of a methane decomposition gas atmosphere of 0.5 tOrr, and after maintaining this partial atmosphere for 15 minutes, the heating atmosphere was changed again. Return to the original vacuum atmosphere,
Sintering under sintering conditions consisting of raising the temperature to a predetermined sintering temperature within the range of 1,380 to 1,500 ℃, holding the sintering temperature for 30 minutes in the same vacuum atmosphere, and then cooling.
WCC cemented carbide substrates having substantially the same composition as the compounding composition and on which a hard surface layer with a COa degree gradient and a hardness gradient are formed are manufactured, and then the surfaces of these substrates are Then, by using a chemical vapor deposition method, a coating layer having the composition and average layer thickness shown in Table 1 is formed to obtain the surface-coated WCC cemented carbide of the present invention (hereinafter referred to as the coated cemented carbide of the present invention) 1 to 1. 18 were produced respectively.
また、比較の目的で、焼結時の常温から焼結温度までの
昇温を、昇温途中で席次雰囲気にかえることなく、５
Ｘ １ｏ−２ｔｏｒｒの真空中で行なう以外は、同一の
条件で従来表面被覆ＷＣ基超硬合金（以下従来被覆超硬
合金）１〜１８をそれぞれ製造した。In addition, for the purpose of comparison, the temperature was raised from room temperature to the sintering temperature during sintering without changing to the sintering atmosphere during heating.
Conventional surface-coated WC-based cemented carbide (hereinafter referred to as "conventional coated cemented carbide") 1 to 18 were each produced under the same conditions except that the process was carried out in a vacuum of X 10-2 torr.
なお、上記の各種被覆超硬合金においては、基体の成分
組成に対応し、基体表面部はそれぞれ近似し、たＣｏ濃
度勾配および硬さ勾配を示すので、本発明被覆超硬合金
１．２および従来被覆超硬合金１．２を代表して、第１
図および第２図に、その基体表面部におけるＣｏａ度勾
配および硬さ勾配をそれぞれ示した。In addition, in the above-mentioned various coated cemented carbide alloys, the surface portions of the substrates exhibit Co concentration gradients and hardness gradients that are similar to each other, corresponding to the component composition of the substrate. As a representative of conventional coated cemented carbide 1.2, the first
The Coa degree gradient and the hardness gradient on the surface of the substrate are shown in the figure and FIG. 2, respectively.
ついで、この結果得られた各種の被覆超硬合金を切削工
具として用い、
被削材：ＪＩＳ−８ＣＭ４１５ （硬さ： ＨＢ１５０
）、切削速度：３００ｍ／ｉｆ口、
送 リ：０．２ｍｍ／ ｒｅｖ −。Next, the various coated cemented carbide obtained as a result was used as a cutting tool to cut the material: JIS-8CM415 (hardness: HB150).
), Cutting speed: 300m/if, Feed: 0.2mm/rev -.
切込み：２ｍｍ、
切削時間： ２０ｍ１口、
の条件で鋼の連続高速切削試験を行ない、試験後、切刃
の逃げ面摩耗幅を測定すると共に、被覆層の剥離の有無
を観察した。これらの結果を第１表に示した。A continuous high-speed cutting test was conducted on steel under the following conditions: depth of cut: 2 mm, cutting time: 20 m/cut, and after the test, the flank wear width of the cutting edge was measured and the presence or absence of peeling of the coating layer was observed. These results are shown in Table 1.
第１表に示される結果から、本発明被覆超硬合金１〜１
８は、いずれも被覆層の基体表面への密着性にすぐれて
いるので、被覆層に剥離現象は見られず、したがってす
ぐれた耐摩耗性を示すのに対して、従来被覆超硬合金１
〜１８は、いずれも被覆層の基体表面への密着性が不十
分なので、被覆層に剥離が発生し、耐摩耗性の劣ったも
のになっていることが明らかである。From the results shown in Table 1, the present invention coated cemented carbide 1 to 1
No. 8 has excellent adhesion of the coating layer to the substrate surface, so no peeling phenomenon is observed in the coating layer, and thus exhibits excellent wear resistance, whereas conventionally coated cemented carbide No. 1
It is clear that in all of Samples Nos. 1 to 18, the adhesion of the coating layer to the substrate surface was insufficient, resulting in peeling of the coating layer and poor abrasion resistance.
上述のように、この発明の表面被覆ＷＣＣ超超硬合金、
これを構成する被覆層の基体表面への付着強度が、基体
表面部に形成された、いずれも内部から表面に向って、
連続的に減少したＣｏａ度勾配、並びに連続的に増加し
た硬さ勾配を有する表面硬質層によって著しく向上した
ものになっているので、これを高速切削や重切削などの
苛酷な条件下で切削工具として用いても被覆層に剥離が
発生ずることなく、すぐれた耐摩耗性を著しく長期に亘
って発揮するのである。As mentioned above, the surface-coated WCC cemented carbide of the present invention,
The adhesion strength of the coating layer constituting this to the substrate surface increases from the inside to the surface of the substrate formed on the substrate surface.
The surface hardness layer has a continuously decreasing Coa degree gradient and a continuously increasing hardness gradient, which significantly improves the performance of cutting tools under severe conditions such as high-speed cutting and heavy cutting. Even when used as a coating, the coating layer does not peel off and exhibits excellent wear resistance over a long period of time.
第１図および第２図は基体の表面部におけるＣｏａ度勾
配並びに硬さ勾配をそれぞれ示す図である。FIGS. 1 and 2 are diagrams showing the Coa degree gradient and hardness gradient, respectively, on the surface portion of the base.
Claims (2)
のうちの１種以上：４〜１５重量％、 を含有し、残りが分散相形成成分としての炭化タングス
テンと不可避不純物からなる組成を有し、かつ、表面部
に、内部から表面に向って、Ｃｏ含有量が連続的に減少
するＣｏ濃度勾配、並びに硬さが連続的に増加する硬さ
勾配をもった表面硬質層を形成してなる炭化タングステ
ン基超硬合金基体の表面に、Ｔｉ、Ｚｒ、およびＨｆの
炭化物、窒化物、炭窒化物、炭酸化物、および炭窒酸化
物、並びに酸化アルミニウムのうちの１種の単層または
２種以上の複層からなる被覆層を０．５〜２０μｍの平
均層厚で形成してなる切削工具用表面被覆炭化タングス
テン基超硬合金。(1) Co, Ni, and Fe as bonded phase forming components
One or more of the following: 4 to 15% by weight, with the remainder consisting of tungsten carbide as a dispersed phase forming component and unavoidable impurities, and in the surface portion, from the inside to the surface, Ti, Zr, , Hf carbides, nitrides, carbonitrides, carbonates, and carbonitrides, and aluminum oxide. A surface-coated tungsten carbide-based cemented carbide for cutting tools formed with an average layer thickness of .
のうちの１種以上：４〜１５重量％、 分散相形成成分としてのＴｉ、Ｔａ、Ｎｂ、およびＷの
炭化物、窒化物、および炭窒化物、並びにこれらの２種
以上の固溶体（ただしＷの窒化物と炭窒化物は除く）の
うちの１種以上：０．５〜３０重量％、 を含有し、残りが同じく分散相形成成分としての炭化タ
ングステンと不可避不純物からなる組成を有し、かつ、
表面部に、内部から表面に向って、Ｃｏ含有量が連続的
に減少するＣｏ濃度勾配、並びに硬さが連続的に増加す
る硬さ勾配をもった表面硬質層を形成してなる炭化タン
グステン基超硬合金基体の表面に、Ｔｉ、Ｚｒ、および
Ｈｆの炭化物、窒化物、炭窒化物、炭酸化物、および炭
窒酸化物、並びに酸化アルミニウムのうちの１種の単層
または２種以上の複層からなる被覆層を０．５〜２０μ
ｍの平均層で形成してなる切削工具用表面被覆炭化タン
グステン基超硬合金。(2) Co, Ni, and Fe as bonded phase forming components
One or more of the following: 4 to 15% by weight, carbides, nitrides, and carbonitrides of Ti, Ta, Nb, and W as dispersed phase forming components, and solid solutions of two or more of these (however, 0.5 to 30% by weight of one or more of the following (excluding nitrides and carbonitrides), with the remainder consisting of tungsten carbide as a dispersed phase forming component and inevitable impurities, and ,
A tungsten carbide base formed by forming a hard surface layer on the surface having a Co concentration gradient in which the Co content continuously decreases from the inside toward the surface and a hardness gradient in which the hardness continuously increases. A single layer or a composite layer of two or more of carbides, nitrides, carbonitrides, carbonates, and carbonitrides of Ti, Zr, and Hf, and aluminum oxide are formed on the surface of the cemented carbide substrate. The coating layer consists of 0.5~20μ
A surface-coated tungsten carbide-based cemented carbide for cutting tools formed of an average layer of m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63170185A JP2684688B2 (en) | 1988-07-08 | 1988-07-08 | Surface-coated tungsten carbide based cemented carbide for cutting tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63170185A JP2684688B2 (en) | 1988-07-08 | 1988-07-08 | Surface-coated tungsten carbide based cemented carbide for cutting tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0222453A true JPH0222453A (en) | 1990-01-25 |
| JP2684688B2 JP2684688B2 (en) | 1997-12-03 |
Family
ID=15900262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63170185A Expired - Lifetime JP2684688B2 (en) | 1988-07-08 | 1988-07-08 | Surface-coated tungsten carbide based cemented carbide for cutting tools |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2684688B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04120274A (en) * | 1989-12-27 | 1992-04-21 | Sumitomo Electric Ind Ltd | Coated cemented carbide and production thereof |
| US5296016A (en) * | 1990-12-25 | 1994-03-22 | Mitsubishi Materials Corporation | Surface coated cermet blade member |
| JP2005529236A (en) * | 2002-06-10 | 2005-09-29 | ケンナメタル ヴィディア ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト | Hard metal support and manufacturing method thereof |
| JP2012117121A (en) * | 2010-12-01 | 2012-06-21 | Sumitomo Electric Hardmetal Corp | Cermet |
| CZ305378B6 (en) * | 2000-12-22 | 2015-08-26 | Seco Tools Ab | Cutting tool insert comprising hard metal substrate and coating |
| CN109863257A (en) * | 2016-09-30 | 2019-06-07 | 山特维克知识产权股份有限公司 | The method for being machined Ti, Ti alloy and Ni based alloy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60100660A (en) * | 1983-11-07 | 1985-06-04 | Toshiba Tungaloy Co Ltd | Surface-coated hard material |
| JPS6389666A (en) * | 1986-10-03 | 1988-04-20 | Mitsubishi Metal Corp | Cutting tool made of surface-coated tungsten carbide based sintered hard alloy |
-
1988
- 1988-07-08 JP JP63170185A patent/JP2684688B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60100660A (en) * | 1983-11-07 | 1985-06-04 | Toshiba Tungaloy Co Ltd | Surface-coated hard material |
| JPS6389666A (en) * | 1986-10-03 | 1988-04-20 | Mitsubishi Metal Corp | Cutting tool made of surface-coated tungsten carbide based sintered hard alloy |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04120274A (en) * | 1989-12-27 | 1992-04-21 | Sumitomo Electric Ind Ltd | Coated cemented carbide and production thereof |
| US5296016A (en) * | 1990-12-25 | 1994-03-22 | Mitsubishi Materials Corporation | Surface coated cermet blade member |
| CZ305378B6 (en) * | 2000-12-22 | 2015-08-26 | Seco Tools Ab | Cutting tool insert comprising hard metal substrate and coating |
| JP2005529236A (en) * | 2002-06-10 | 2005-09-29 | ケンナメタル ヴィディア ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト | Hard metal support and manufacturing method thereof |
| JP2012117121A (en) * | 2010-12-01 | 2012-06-21 | Sumitomo Electric Hardmetal Corp | Cermet |
| CN109863257A (en) * | 2016-09-30 | 2019-06-07 | 山特维克知识产权股份有限公司 | The method for being machined Ti, Ti alloy and Ni based alloy |
| CN109863257B (en) * | 2016-09-30 | 2021-06-22 | 山特维克知识产权股份有限公司 | Method for machining Ti, Ti alloy and Ni-based alloy |
| US11141829B2 (en) | 2016-09-30 | 2021-10-12 | Sandvik Intellectual Property Ab | Method of machining Ti, Ti-alloys and Ni-based alloys |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2684688B2 (en) | 1997-12-03 |
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