JPS6120627B2 - - Google Patents
Info
- Publication number
- JPS6120627B2 JPS6120627B2 JP53067503A JP6750378A JPS6120627B2 JP S6120627 B2 JPS6120627 B2 JP S6120627B2 JP 53067503 A JP53067503 A JP 53067503A JP 6750378 A JP6750378 A JP 6750378A JP S6120627 B2 JPS6120627 B2 JP S6120627B2
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- coated
- free carbon
- thickness
- free
- 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000011247 coating layer Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 2
- -1 oxycarbides Chemical class 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Chemical Vapour Deposition (AREA)
Description
【発明の詳細な説明】
本発明は被覆超硬合金に係り、特に強度の高い
被覆超硬合金に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coated cemented carbide, and particularly to a coated cemented carbide having high strength.
超硬合金に硬質被覆を施すことは、切削工具の
用途に広く実用化されている。そして気相化学蒸
着法等によつて硬質被覆を施す際に表面が脱炭さ
れることが知られており、それを補うために、母
材超硬合金の全体または表面近傍に遊離炭素を存
在させることが提案されていた。 Applying a hard coating to cemented carbide is widely used in cutting tools. It is known that the surface is decarburized when hard coating is applied using vapor phase chemical vapor deposition, etc., and to compensate for this, free carbon is present throughout or near the surface of the base cemented carbide. It was proposed to do so.
しかし超硬合金の表面近傍に遊離炭素が存在す
ることは、超硬合金の曲げ強度を著しく低下させ
るという欠点があつた。 However, the presence of free carbon near the surface of the cemented carbide has the drawback of significantly reducing the bending strength of the cemented carbide.
本発明はこの欠点を除去するためになされたも
ので、表面付近に、好ましくは10〜100μｍの厚
さ、さらに好ましくは20〜45μｍの厚さに遊離炭
素がなく、内部に好ましくは0.01〜0.3重量％の
範囲の遊離炭素のある超硬合金の表面に、周期律
表ａ，ａおよびａ族金属の炭化物、炭窒化
物および酸炭窒化物の１種また２種以上を被覆し
てなり、超硬合金表面の脱炭層が厚さ３μｍ以下
であることを特徴とする被覆超硬合金、または被
覆層の上にさらに、周期律表ａ，ａ，ａ族
金属およびAl、Si等の酸化物、炭化物、酸炭化
物、窒化物、酸炭窒化物および炭窒化物の１種ま
た２種以上で前記被覆層とは異なるものを、10μ
ｍ以下の厚さに被覆した被覆超硬合金を、内容と
するものである。 The present invention has been made to eliminate this drawback, with no free carbon near the surface, preferably in a thickness of 10-100 μm, more preferably 20-45 μm, and inside preferably 0.01-0.3 μm. The surface of a cemented carbide having free carbon in the range of % by weight is coated with one or more carbides, carbonitrides and oxycarbonitrides of metals in groups A, A and A of the periodic table, A coated cemented carbide characterized by a decarburized layer on the surface of the cemented carbide having a thickness of 3 μm or less, or a coated cemented carbide which is further coated with metals from groups a, a, and a of the periodic table, and oxides of Al, Si, etc. , carbide, oxycarbide, nitride, oxycarbonitride, and carbonitride, which are different from the above-mentioned coating layer.
The content is a coated cemented carbide coated to a thickness of m or less.
本発明被覆超硬合金は、表面近傍に遊離炭素が
存在しないので曲げ強度が高く、しかも表面脱炭
の影響が充分に少なくなつている。 The coated cemented carbide of the present invention has high bending strength since there is no free carbon near the surface, and the influence of surface decarburization is sufficiently reduced.
重量比で89％WC−５％（Ti，Ta）Ｃ−６％
Coの組成の超硬合金焼結体を1050℃でH2気流中
で３時間保持した。これを顕微鏡で断面観察する
と、表面から２μはη相であり、また30μまでは
遊離炭素ない組織が見られた。 Weight ratio: 89% WC-5% (Ti, Ta)C-6%
A cemented carbide sintered body having a composition of Co was held at 1050°C in a H 2 stream for 3 hours. When this cross-section was observed under a microscope, it was found that the 2μ from the surface was an η phase, and a structure with no free carbon was observed up to 30μ.
このような予備処理したものとしないものにつ
いて、多くの種類の被覆を行なつて切削試験をし
た結果、いずれも本発明の効果が認められた。 Cutting tests were carried out using many types of coatings, with and without such pretreatment, and the effects of the present invention were found in all cases.
本発明被覆超硬合金で二重被覆になつている物
は、耐摩耗性および耐溶着性を向上させる目的で
第二の被覆層を設けたのであつて、これによつて
前記の本発明の効果はそこなわれず、むしろ組合
せの効果が生ずる。 The double coating of the coated cemented carbide of the present invention is provided with a second coating layer for the purpose of improving wear resistance and welding resistance. The effect is not impaired, but rather the effect of the combination is produced.
本発明被覆超硬合金は切削工具用として好適で
あり、他の用途にも応用範囲を拡げる可能性を有
するから、本発明の工業的価値は大きい。 The coated cemented carbide of the present invention is suitable for use in cutting tools, and has the potential to expand the scope of application to other uses, so the present invention has great industrial value.
Claims (1)
のある超硬合金の表面に、周期律表ａ，ａお
よびａ族金属の炭化物、炭窒化物および酸炭窒
化物の１種または２種以上を被覆してなり、超硬
合金表面の脱炭層が厚さ３μｍ以下であることを
特徴とする被覆超硬合金。 ２ 超硬合金の表面付近の遊離炭素のない層の厚
さが10〜100μｍである特許請求の範囲第１項記
載の被覆超硬合金。 ３ 超硬合金の表面付近の遊離炭素のない層の厚
さが20〜45μｍである特許請求の範囲第１項記載
の被覆超硬合金。 ４ 超硬合金内部の遊離炭素、含有量が0.01〜
0.3重量％の範囲である特許請求の範囲第１項記
載の被覆超硬合金。 ５ 被覆層の上にさらに、周期律表ａ，ａ，
ａ族金属およびAl、Si等の酸化物、炭化物、酸
炭化物、窒化物、酸炭窒化物および炭窒化物の１
種または２種以上で前記被覆層とは異なるものを
10μｍ以下の厚さに被覆してなる特許請求の範囲
第１項ないし第４項の被覆超硬合金。[Scope of Claims] 1. On the surface of a cemented carbide with no free carbon near the surface and with free carbon inside, carbides, carbonitrides, and oxycarbonitrides of metals in groups a, a, and a of the periodic table are coated. A coated cemented carbide coated with one or more kinds of cemented carbide, characterized in that a decarburized layer on the surface of the cemented carbide has a thickness of 3 μm or less. 2. The coated cemented carbide according to claim 1, wherein the free carbon-free layer near the surface of the cemented carbide has a thickness of 10 to 100 μm. 3. The coated cemented carbide according to claim 1, wherein the free carbon-free layer near the surface of the cemented carbide has a thickness of 20 to 45 μm. 4 Free carbon inside cemented carbide, content is 0.01~
A coated cemented carbide according to claim 1 in the range of 0.3% by weight. 5 On top of the coating layer, periodic table a, a,
Group A metals and oxides, carbides, oxycarbides, nitrides, oxycarbonitrides, and carbonitrides of Al, Si, etc.
A species or two or more species different from the above-mentioned coating layer.
The coated cemented carbide according to any one of claims 1 to 4, which is coated to a thickness of 10 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6750378A JPS54158314A (en) | 1978-06-05 | 1978-06-05 | Coated sintered carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6750378A JPS54158314A (en) | 1978-06-05 | 1978-06-05 | Coated sintered carbide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54158314A JPS54158314A (en) | 1979-12-14 |
| JPS6120627B2 true JPS6120627B2 (en) | 1986-05-23 |
Family
ID=13346848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6750378A Granted JPS54158314A (en) | 1978-06-05 | 1978-06-05 | Coated sintered carbide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54158314A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61174379A (en) * | 1985-01-29 | 1986-08-06 | Sumitomo Electric Ind Ltd | Sintered hard alloy parts coated with silicon nitride and manufacture thereof |
| JP2770372B2 (en) * | 1989-02-21 | 1998-07-02 | 住友電気工業株式会社 | Coated cemented carbide for wear-resistant tools and method for producing the same |
| JP5978671B2 (en) * | 2012-03-15 | 2016-08-24 | 住友電気工業株式会社 | Replaceable cutting edge |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53114711A (en) * | 1977-03-18 | 1978-10-06 | Mitsubishi Metal Corp | Covered superhard alloy tool |
-
1978
- 1978-06-05 JP JP6750378A patent/JPS54158314A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53114711A (en) * | 1977-03-18 | 1978-10-06 | Mitsubishi Metal Corp | Covered superhard alloy tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54158314A (en) | 1979-12-14 |
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