JPH09248703A - Surface coating tungsten carbide radical cemented carbide cutting tool having excellent chipping resistance in hard coating layer - Google Patents
Surface coating tungsten carbide radical cemented carbide cutting tool having excellent chipping resistance in hard coating layerInfo
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- JPH09248703A JPH09248703A JP5616196A JP5616196A JPH09248703A JP H09248703 A JPH09248703 A JP H09248703A JP 5616196 A JP5616196 A JP 5616196A JP 5616196 A JP5616196 A JP 5616196A JP H09248703 A JPH09248703 A JP H09248703A
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- layer
- hard coating
- average
- cutting tool
- cemented carbide
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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
ぐれた耐欠損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（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 relates to a surface-coated tungsten carbide-based cemented carbide cutting tool having a hard coating layer having excellent fracture resistance (hereinafter referred to as coated carbide cutting tool).
【０００２】[0002]
【従来の技術】従来、一般に、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て、いずれも０．１〜４μｍの平
均層厚を有するＴｉの炭化物（以下、ＴｉＣで示す）
層、窒化物（以下、ＴｉＮで示す）層、炭窒化物（以
下、ＴｉＣＮで示す）層、炭酸化物（以下、ＴｉＣＯで
示す）層、窒酸化物（以下、ＴｉＮＯで示す）層、およ
び炭窒酸化物（以下、ＴｉＣＮＯで示す）層（以下、こ
れらを総称してＴｉの炭・窒・酸化物層という）のうち
の１種以上と、０．２〜２μｍの平均層厚を有する酸化
アルミニウム（以下、Ａｌ2 Ｏ3 で示す）層とで構成さ
れた硬質被覆層を、１〜６μｍ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おり、この被覆超硬切削
工具が、例えば鋼や鋳鉄の連続切削や断続切削などに用
いられていることも良く知られるところである。2. Description of the Related Art Conventionally, an average layer thickness of 0.1 to 4 μm has been generally used on the surface of a tungsten carbide based cemented carbide substrate (hereinafter referred to as a cemented carbide substrate) by chemical vapor deposition or physical vapor deposition. Carbide of Ti (hereinafter referred to as TiC)
Layer, nitride (hereinafter, referred to as TiN) layer, carbonitride (hereinafter, referred to as TiCN) layer, carbon oxide (hereinafter, referred to as TiCO) layer, nitrogen oxide (hereinafter, referred to as TiNO) layer, and carbon Oxidation having one or more of a nitride oxide (hereinafter referred to as TiCNO) layer (hereinafter collectively referred to as Ti carbon / nitride / oxide layer) and an average layer thickness of 0.2 to 2 μm. A coated cemented carbide cutting tool is known in which a hard coated layer composed of an aluminum (hereinafter referred to as Al 2 O 3 ) layer is formed with an average layer thickness of 1 to 6 μm. It is also well known that the tool is used for, for example, 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、近年の切削加工
の高能率化および省力化に対する要求は強く、これに伴
ない、切削加工は高速化並びに高送りおよび高切込みな
どの重切削化の傾向にあるが、上記従来被覆超硬切削工
具においては、これを例えば鋼や鋳鉄のフライス切削
（断続切削）に、高速で、かつ高送りや高切込みなどの
高靭性が要求される苛酷な条件で用いた場合、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（微小
欠け）などの欠損が発生し易く、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, there has been a strong demand for high efficiency and labor saving in cutting, and along with this, there is a tendency for heavy cutting such as high speed and high feed and high depth of cutting. However, in the above-mentioned conventional coated carbide cutting tool, for example, this is used for milling (intermittent cutting) of steel or cast iron under high-speed and high-toughness such as high feed and high depth of cut under severe conditions requiring high toughness. When used, the hard coating layer is insufficient in toughness, so that the cutting edge is likely to be damaged such as chipping or chipping (fine chipping), and the service life is relatively short.
【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、上記従来被覆超硬切削工具の硬
質被覆層に着目し、これの耐欠損性向上を図るべく研究
を行った結果、前記硬質被覆層の構成層として、Ａｌと
ＳｉとＴｉの非晶質複合酸化物層、望ましくはＳｉ：１
〜２０重量％およびＴｉ：０．１〜１０重量％を含有す
るＡｌとＳｉとＴｉの非晶質複合酸化物層（以下、非晶
質層という）を加えて、前記硬質被覆層を、Ｔｉの炭・
窒・酸化物のうちの１種以上と、Ａｌ2 Ｏ3 層と、非晶
質層で構成すると、この結果の硬質被覆層は、耐摩耗性
の低下なく、すぐれた靭性を具備するようになり、した
がって、この硬質被覆層を形成してなる被覆超硬切削工
具は、高靭性が要求される高送りおよび高切込みなどの
重切削を断続切削で、かつ高速で行なっても、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
From the above viewpoint, focusing on the hard coating layer of the conventional coated carbide cutting tool, as a result of research to improve the fracture resistance thereof, as a constituent layer of the hard coating layer, Al and Si and Amorphous composite oxide layer of Ti, preferably Si: 1
.About.20% by weight and Ti: 0.1 to 10% by weight, and an amorphous composite oxide layer of Al, Si and Ti (hereinafter referred to as an amorphous layer) is added to the hard coating layer to form Ti. Charcoal
When it is composed of at least one of nitrogen and oxide, an Al 2 O 3 layer, and an amorphous layer, the resulting hard coating layer has excellent toughness without deterioration in wear resistance. Therefore, the coated carbide cutting tool formed by forming this hard coating layer can be used for heavy cutting such as high feed and high depth of cut, which requires high toughness, with intermittent cutting at high speed, We have obtained the research results that show excellent cutting performance over a long period of time without chipping or chipping.
【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、化学蒸着法
および／または物理蒸着法にて、硬質被覆層を１〜６μ
ｍの平均層厚で形成してなる被覆超硬切削工具におい
て、上記硬質被覆層を、いずれも０．１〜４μｍの平均
層厚を有するＴｉの炭・窒・酸化物層のうちの１種以上
と、０．２〜２μｍの平均層厚を有するＡｌ2 Ｏ3層
と、同じく０．２〜２μｍの平均層厚を有する非晶質層
で構成してなる、硬質被覆層がすぐれた耐欠損性を有す
る被覆超硬切削工具に特徴を有するものである。The present invention has been made based on the above-mentioned research results, and a hard coating layer of 1 to 6 μm is formed on the surface of a superhard substrate by a chemical vapor deposition method and / or a physical vapor deposition method.
In a coated carbide cutting tool formed with an average layer thickness of m, the hard coating layer is one of Ti carbon / nitride / oxide layers each having an average layer thickness of 0.1 to 4 μm. As described above, the hard coating layer formed of an Al 2 O 3 layer having an average layer thickness of 0.2 to 2 μm and an amorphous layer also having an average layer thickness of 0.2 to 2 μm has an excellent durability. It is characterized by a coated cemented carbide cutting tool having a chipping property.
【０００６】つぎに、この発明の被覆超硬切削工具にお
いて、上記の通りに数値限定した理由を説明する。 （ａ） 硬質被覆層の平均層厚 その平均層厚が１μｍ未満では所望の耐摩耗性を確保す
ることができず、一方その平均層厚が６μｍを越える
と、特に高靭性が要求される苛酷な切削条件で、切刃に
欠けやチッピングが発生し易くなることから、その平均
層厚を１〜６μｍ、望ましくは２〜４．５μｍと定め
た。Next, the reason for limiting the numerical values as described above in the coated carbide cutting tool of the present invention will be described. (A) Average layer thickness of hard coating layer If the average layer thickness is less than 1 μm, desired abrasion resistance cannot be ensured. On the other hand, if the average layer thickness exceeds 6 μm, particularly high toughness is required. Since the cutting edge is likely to be chipped or chipped under various cutting conditions, the average layer thickness is set to 1 to 6 μm, preferably 2 to 4.5 μm.
【０００７】（ｂ） Ｔｉの炭・窒・酸化物層の平均層
厚 その平均層厚が０．１μｍ未満では、硬質被覆層に脆化
傾向が現れ、切刃にチッピングが発生し易くなり、一方
その平均層厚が４μｍを越えると、摩耗進行が促進する
ようになることから、その平均層厚を０．１〜４μｍ、
望ましくは０．３〜３μｍと定めた。(B) Average Thickness of Carbon / Nitrogen / Oxide Layer of Ti If the average layer thickness is less than 0.1 μm, the hard coating layer tends to become brittle and chipping tends to occur on the cutting edge. On the other hand, if the average layer thickness exceeds 4 μm, the progress of wear will be accelerated. Therefore, the average layer thickness is 0.1 to 4 μm.
It is preferably set to 0.3 to 3 μm.
【０００８】（ｃ） Ａｌ2 Ｏ3 層の平均層厚 その平均層厚が０．２μｍ未満では、所望の耐摩耗性を
確保することができず、一方その平均層厚が２μｍを越
えると、耐欠損性が低下するようになることから、その
平均層厚を０．２〜２μｍ，望ましくは０．５〜１．５
μｍと定めた。(C) Average Layer Thickness of Al 2 O 3 Layer If the average layer thickness is less than 0.2 μm, desired abrasion resistance cannot be secured, while if the average layer thickness exceeds 2 μm, Since the fracture resistance is lowered, the average layer thickness is 0.2 to 2 μm, preferably 0.5 to 1.5.
μm.
【０００９】（ｄ） 非晶質層の平均層厚 その平均層厚が０．２μｍ未満では硬質被覆層に所望の
すぐれた靭性を付与することができず、一方その平均層
厚が２μｍを越えると、耐摩耗性が急激に低下するよう
になることから、その平均層厚を０．２〜２μｍ、望ま
しくは０．５〜１．５μｍと定めた。なお、上記非晶質
層におけるＳｉおよびＴｉの含有割合は、それぞれＳ
ｉ：１〜２０重量％およびＴｉ：０．１〜１０重量％と
するのが望ましく、これはＳｉおよびＴｉのいずれかで
も、その含有割合がＳｉ：１重量％未満およびＴｉ：
０．１重量％未満になると、非晶質化が困難になり、結
晶化が強まって所望のすぐれた靭性を確保することがで
きなくなり、一方ＳｉおよびＴｉのいずれかでもＳｉ：
２０重量％およびＴｉ：１０重量％を越えると、急激に
軟質化し、層自体の摩耗進行が促進し、硬質被覆層の耐
摩耗性低下の原因となるという理由によるものであり、
さらに望ましくはＳｉ：５〜１０重量％、Ｔｉ：１〜５
重量％の含有がよい。(D) Average Layer Thickness of Amorphous Layer If the average layer thickness is less than 0.2 μm, desired excellent toughness cannot be imparted to the hard coating layer, while the average layer thickness exceeds 2 μm. Then, since the wear resistance is rapidly reduced, the average layer thickness is set to 0.2 to 2 μm, preferably 0.5 to 1.5 μm. The content ratios of Si and Ti in the amorphous layer are S and S, respectively.
It is desirable that i: 1 to 20% by weight and Ti: 0.1 to 10% by weight, which is either Si or Ti, the content ratio of which is less than Si: 1% by weight and Ti:
If it is less than 0.1% by weight, it becomes difficult to amorphize, and crystallization is intensified to make it impossible to secure desired excellent toughness. On the other hand, in any of Si and Ti, Si:
This is because when it exceeds 20% by weight and Ti: 10% by weight, it is suddenly softened, the wear of the layer itself is promoted, and the wear resistance of the hard coating layer is reduced.
More preferably, Si: 5 to 10% by weight, Ti: 1 to 5
% By weight is preferred.
【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：５μｍ（粗粒）および同０．５μｍ（細
粒）のＷＣ粉末、同１．２μｍの（Ｔｉ，Ｗ）ＣＮ［Ｔ
ｉＣ／ＴｉＮ／ＷＣ＝重量比で２４／２０／５６］粉
末、同１．３μｍの（Ｔａ，Ｎｂ）Ｃ［ＴａＣ／ＮｂＣ
＝重量比で９０／１０］粉末、同１．０μｍのＣｒ粉
末、および同１．２μｍのＣｏ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ＩＳ
Ｏ規格ＳＥＥＮ１２０４ＡＦＴＮ１に則した形状の圧粉
体にプレス成形し、この圧粉体を同じく表１に示される
条件で真空焼結することにより超硬基体Ａ〜Ｅをそれぞ
れ製造した。ついで、上記超硬基体Ａ〜Ｅを所定の形状
に加工し、ホーニングを施した後、通常の化学蒸着装置
を用いて、それぞれの超硬基体表面に、表２に示される
条件で、表３，４に示される組成および平均層厚の硬質
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
〜１２および従来被覆超硬切削工具１〜１２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 diameter of 5 μm (coarse particles) and 0.5 μm (fine particles), and (Ti, W) CN [T of 1.2 μm
iC / TiN / WC = weight ratio 24/20/56] powder, 1.3 μm of (Ta, Nb) C [TaC / NbC]
= 90/10 by weight ratio] powder, 1.0 μm Cr powder, and 1.2 μm Co powder, and these raw material powders were blended to the blending composition shown in Table 1 and wet-mixed in a ball mill for 72 hours. Then, after drying, the mixed powder is IS
The cemented carbide substrates A to E were manufactured by press-molding into a green compact having a shape conforming to the O standard SEEN1204AFTN1 and subjecting the green compact to vacuum sintering under the same conditions shown in Table 1. Then, the above-mentioned cemented carbide substrates A to E were processed into a predetermined shape and subjected to honing, and thereafter, on the surface of each cemented carbide substrate using a normal chemical vapor deposition apparatus under the conditions shown in Table 2, Of the present invention by forming a hard coating layer having the composition and average layer thickness shown in FIGS.
-12 and conventional coated carbide cutting tools 1-12, respectively.
【００１１】ついで、この結果得られた各種の被覆超硬
切削工具のうち本発明被覆超硬切削工具１〜７および従
来被覆超硬切削工具１〜７については、 被削材：ＦＣ３００（硬さ：ＨB １８０）の角材 切削速度：４００ｍ／min.、 送り：０．３５mm／rev.、 切込み：２mm、 切削時間：１０分、 の条件で鋳鉄の湿式高速高送りフライス切削試験を行
い、また本発明被覆超硬切削工具６〜１２および従来被
覆超硬切削工具６〜１２については、 被削材：ＳＣＭ４４０（硬さ：ＨB ２２０）の角材、 切削速度：３００ｍ／min.、 送り：０．３８mm／rev.、 切込み：２mm、 切削時間：１０分、 の条件で鋼の乾式高速高送りフライス切削試験を行な
い、いずれの試験で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５に示した。Then, among the various coated carbide cutting tools obtained as a result, for the coated carbide cutting tools 1 to 7 of the present invention and the conventional coated carbide cutting tools 1 to 7, the work material: FC300 (hardness : H B 180) square material Cutting speed: 400 m / min., Feed: 0.35 mm / rev., Depth of cut: 2 mm, Cutting time: 10 minutes, Wet high-speed high-feed milling test of cast iron was performed. the present invention coated cemented carbide for cutting tools 6-12 and conventional coated carbide cutting tools 6-12, workpiece: SCM440 (hardness: H B 220) square bar of cutting speed:. 300 meters / min, feed: 0 .38 mm / rev., Depth of cut: 2 mm, cutting time: 10 minutes, a dry high-speed high-feed milling test of steel was performed, and the flank wear width of the cutting edge was measured in each test.
Table 5 shows the results of these measurements.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【表２】 [Table 2]
【００１４】[0014]
【表３】 [Table 3]
【００１５】[0015]
【表４】 [Table 4]
【００１６】[0016]
【表５】 [Table 5]
【００１７】[0017]
【発明の効果】表５に示される結果から、本発明被覆超
硬切削工具１〜１２は、Ｔｉの炭・窒・酸化物層とＡｌ
2 Ｏ3 層と非晶質層で構成される硬質被覆層がすぐれた
靭性をもつことから、フライス切削（断続切削）を高速
で、かつ高送り切削および高切込みで行なっても切刃に
欠けやチッピングの発生なく、すぐれた耐摩耗性を示す
のに対して、従来被覆超硬切削工具１〜１２は、硬質被
覆層が十分な靭性を具備するものでないために、特に高
靭性が要求される上記の苛酷な切削条件では比較的短時
間でいずれも切刃にチッピングが発生し、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、これを構成する硬質被覆層がすぐれた
靭性を有することから、苛酷な切削条件でも前記硬質被
覆層はすぐれた耐欠損性を示し、長期に亘ってすぐれた
切削性能を発揮するものであり、したがって切削加工の
高能率化および省力化に十分満足に対応することができ
るものである。From the results shown in Table 5, the coated carbide cutting tools 1 to 12 of the present invention show that the carbon / nitride / oxide layer of Ti and Al
The hard coating layer composed of the 2 O 3 layer and the amorphous layer has excellent toughness, so that the cutting edge is chipped even when milling (intermittent cutting) is performed at high speed and with high feed cutting and high depth of cut. While it exhibits excellent wear resistance without chipping or chipping, the conventional coated carbide cutting tools 1 to 12 are required to have particularly high toughness because the hard coating layer does not have sufficient toughness. It is clear that under the severe cutting conditions described above, chipping of the cutting edge occurs in a relatively short time and the service life is reached. As described above, the coated carbide cutting tool of the present invention has an excellent toughness of the hard coating layer that constitutes the hard coating layer, which exhibits excellent fracture resistance even under severe cutting conditions, and has a long life. It exhibits excellent cutting performance over a long period of time, and is therefore capable of sufficiently satisfying high efficiency and labor saving in cutting.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２３Ｃ 16/30 Ｃ２３Ｃ 16/30 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C23C 16/30 C23C 16/30
Claims (1)
に、化学蒸着法および／または物理蒸着法にて、硬質被
覆層を１〜６μｍ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、 上記硬質被覆層を、いずれも０．１〜４μｍの平均層厚
を有するＴｉの炭化物層、窒化物層、炭窒化物層、炭酸
化物層、窒酸化物層、および炭窒酸化物層のうちの１種
以上と、０．２〜２μｍの平均層厚を有する酸化アルミ
ニウム層と、０．２〜２μｍの平均層厚を有するＡｌと
ＳｉとＴｉの非晶質複合酸化物層で構成したことを特徴
とする硬質被覆層がすぐれた耐欠損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-coated tungsten carbide-based superstructure obtained by forming a hard coating layer on the surface of a tungsten carbide-based cemented carbide substrate by chemical vapor deposition and / or physical vapor deposition to have an average layer thickness of 1 to 6 μm. In a hard-alloy cutting tool, the hard coating layer includes a Ti carbide layer, a nitride layer, a carbonitride layer, a carbonoxide layer, a nitric oxide layer, each of which has an average layer thickness of 0.1 to 4 μm. One or more of carbon oxynitride layers, an aluminum oxide layer having an average layer thickness of 0.2 to 2 μm, and an amorphous composite of Al, Si, and Ti having an average layer thickness of 0.2 to 2 μm. A surface-coated tungsten carbide-based cemented carbide cutting tool having an excellent fracture resistance, which is characterized by comprising an oxide layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05616196A JP3236910B2 (en) | 1996-03-13 | 1996-03-13 | Surface-coated tungsten carbide based cemented carbide cutting tool with excellent fracture resistance with hard coating layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05616196A JP3236910B2 (en) | 1996-03-13 | 1996-03-13 | Surface-coated tungsten carbide based cemented carbide cutting tool with excellent fracture resistance with hard coating layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09248703A true JPH09248703A (en) | 1997-09-22 |
| JP3236910B2 JP3236910B2 (en) | 2001-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05616196A Expired - Fee Related JP3236910B2 (en) | 1996-03-13 | 1996-03-13 | Surface-coated tungsten carbide based cemented carbide cutting tool with excellent fracture resistance with hard coating layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3236910B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7294356B2 (en) * | 1998-06-17 | 2007-11-13 | Advanced Cardiovascular Systems, Inc. | Performance enhancing coating on intraluminal devices |
| JPWO2008041402A1 (en) * | 2006-10-02 | 2010-02-04 | 住友電気工業株式会社 | Surface coated cutting tool |
| CN103124608A (en) * | 2011-06-22 | 2013-05-29 | 三菱综合材料株式会社 | Surface coating cutting tool with excellent defect resistance and abrasion resistance |
| JP2013188852A (en) * | 2012-03-15 | 2013-09-26 | Mitsubishi Materials Corp | Surface-coated cutting tool exhibiting superior chipping resistance, peeling resistance and wearing resistance |
| CN105401129A (en) * | 2015-12-12 | 2016-03-16 | 河南广度超硬材料有限公司 | Superhard composite coating and preparation method thereof |
-
1996
- 1996-03-13 JP JP05616196A patent/JP3236910B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7294356B2 (en) * | 1998-06-17 | 2007-11-13 | Advanced Cardiovascular Systems, Inc. | Performance enhancing coating on intraluminal devices |
| US7905003B2 (en) | 1998-06-17 | 2011-03-15 | Abbott Cardiovascular Systems Inc. | Process for proving a composite radiopaque intracorporeal product |
| US8480599B2 (en) | 1998-06-17 | 2013-07-09 | Abbott Cardiovascular Systems, Inc. | Composite radiopaque intracorporeal product |
| JPWO2008041402A1 (en) * | 2006-10-02 | 2010-02-04 | 住友電気工業株式会社 | Surface coated cutting tool |
| JP5172687B2 (en) * | 2006-10-02 | 2013-03-27 | 住友電気工業株式会社 | Surface coated cutting tool |
| CN103124608A (en) * | 2011-06-22 | 2013-05-29 | 三菱综合材料株式会社 | Surface coating cutting tool with excellent defect resistance and abrasion resistance |
| JP2013188852A (en) * | 2012-03-15 | 2013-09-26 | Mitsubishi Materials Corp | Surface-coated cutting tool exhibiting superior chipping resistance, peeling resistance and wearing resistance |
| CN105401129A (en) * | 2015-12-12 | 2016-03-16 | 河南广度超硬材料有限公司 | Superhard composite coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3236910B2 (en) | 2001-12-10 |
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