KR100187564B1 - Processing for cutting tool surface - Google Patents
Processing for cutting tool surface Download PDFInfo
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- KR100187564B1 KR100187564B1 KR1019960001602A KR19960001602A KR100187564B1 KR 100187564 B1 KR100187564 B1 KR 100187564B1 KR 1019960001602 A KR1019960001602 A KR 1019960001602A KR 19960001602 A KR19960001602 A KR 19960001602A KR 100187564 B1 KR100187564 B1 KR 100187564B1
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- cutting tool
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- cutting
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/56—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/403—Oxides of aluminium, magnesium or beryllium
Abstract
본 발명은 절삭 공구의 표면에 내마모성 증대를 위해 코팅 처리된 코팅층의 불균일한 표면 상태를 개선하여 피가공물 절삭시 미세입자에 걸리는 응력을 분산시켜 주므로써, 공구의 내칩핑성(Chipping)과 인성을 향상시킬 수 있는 것에 관한 것으로, 절삭 공구의 표면에 금속 화합물을 코팅한 후 코팅된 최외곽의 돌출부를 평탄하게 가공 함을 특징으로 하는 코팅 절삭 공구의 표면 처리방법에 관한 기술이다.The present invention improves the non-uniform surface state of the coated coating layer to increase the wear resistance on the surface of the cutting tool to distribute the stress applied to the microparticles when cutting the workpiece, thereby improving the chipping resistance and toughness of the tool The present invention relates to a method of treating a surface of a coated cutting tool, wherein the surface of the cutting tool is coated with a metal compound and then the coated outermost protrusion is smoothly processed.
Description
제1도는 종래의 코팅 절삭 공구의 코팅층 단면을 나타낸 상태도.1 is a state diagram showing a coating layer cross section of a conventional coating cutting tool.
제2도는 본 발명에 따른 코팅 절삭 공구의 코팅층 단면을 나타낸 상태도.2 is a state diagram showing a coating layer cross section of the coated cutting tool according to the present invention.
제3도는 본 발명에 따른 코팅 절삭 공구의 내마모성 시험결과를 나타낸 그래프.3 is a graph showing the wear resistance test results of the coated cutting tool according to the present invention.
제4도는 본 발명에 따른 코팅 절삭 공구의 내결손성 시험결과를 나타낸 그래프.4 is a graph showing the test results of the fracture resistance of the coated cutting tool according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 모재 2 : 표면층1: Base material 2: Surface layer
4 : 평탄면4: flat surface
본 발명은 코팅 절삭 공구의 표면 처리에 관한 것으로, 보다 상세하게는 절삭 공구의 표면에 내마모성 증대를 위해 코팅처리된 코팅층의 불균일한 표면상태를 개선하여 피가공물 절삭시 미세입자에 걸리는 응력을 분산시켜 주므로써 공구의 내칩핑성(Chipping)과 인성을 향상시킬 수 있는 표면 처리에 관한 것이다.The present invention relates to the surface treatment of a coated cutting tool, and more particularly, to improve the non-uniform surface state of the coated coating layer to increase the wear resistance on the surface of the cutting tool to disperse the stress applied to the fine particles when cutting the workpiece The present invention relates to a surface treatment that can improve chipping and toughness of a tool.
피가공물을 절삭하기 위한 절삭 공구는 철, 강(합금강)등과 같은 초경합금을 성분으로 하고, 내마모성 및 인성을 증대시키기 위해 공구 모재표면에 각종 금속 산화물, 탄화물 등과 같은 화합물을 화학증착법(CVD), 물리증착법(PVD)등으로 코팅하고 있다.The cutting tool for cutting the workpiece is made of cemented carbide such as iron, steel (alloy steel), etc., and chemical vapor deposition (CVD), physics of various metal oxides and carbides on the surface of the base material of the tool to increase wear resistance and toughness. It is coated by a vapor deposition method (PVD) or the like.
상기 제조된 코팅막은 통상적으로 다결정 입자로 구성되어 있고, 각각의 입자들은 결정표면의 성질에 의하여 특정한 면이 우선적으로 나타나거나 일부 입자의 불균일한 성질로 인하여 제1도와 같이 모재(1) 코팅된 표면(2)의 최외곽층이 뾰족한 돌출부(3)를 갖게되는 등 거칠어지는 현상이 나타난다.The prepared coating film is usually composed of polycrystalline particles, each surface of the surface is coated with the base material (1) as shown in FIG. 1 due to the non-uniform nature of some particles or a specific surface preferentially due to the nature of the crystal surface The phenomenon that the outermost layer of (2) becomes rough, such as having a sharp protrusion 3 appears.
이러한 현상은 특히 막이 두꺼워 질수록 심해지고, 산화 알루미늄과 같은 세라믹 코팅에서 심하게 나타나는 등, 정도의 차이는 있으나 코팅에서 공통적으로 나타나는 현상이다. 이와 같이 거친 표면 상태를 가진 코팅 절삭 공구는 절삭시 응력이 불균일하게 걸리게되어 특히 절삭날 부위(인선부)에서 쉽게 칩핑(Chipping)이 유발되고, 동시에 하부의 코팅 층이나 모재에 까지 손상을 주어 공구의 성능을 현저히 저하시킨다.This phenomenon is especially common in coatings with varying degrees, especially as the film gets thicker and worsens in ceramic coatings such as aluminum oxide. Coated cutting tools with such rough surface conditions are unevenly stressed during cutting, causing easy chipping at the cutting edge areas (edges), and at the same time damaging the underlying coating layer or substrate. Significantly reduces the performance.
화학증착법인 경우에 고온에서 코팅층의 입자가 성장되기 때문에 입자가 그 물질자체의 평형 상태인 모양으로 되려는 경향이 더욱 강하고, 결정 구조가 입방정형이 아닌 경우에 결정학적 면의 표면에너지 차이가 면에 따라 크기 때문에 표면이 거칠어지는 경향이 더욱 심하다.In the case of chemical vapor deposition, the particles of the coating layer grow at a high temperature, so the particles tend to be in the equilibrium shape of the material itself, and when the crystal structure is not cubic, the difference in the surface energy of the crystallographic plane becomes As a result, the surface tends to be rough.
특히 산화 알루미늄 막의 경우 알파()상이나 카파(к)상을 화학증착법으로 코팅하게 되는데, 이들 산화 알루미늄 코팅층은 내마모성이 우수하여 공구에 코팅하므로써 성능을 크게 향상시킬 수 있으나, 코팅 물질 자체의 인성이 낮고 전술한 바와 같은 거친 표면 상태로 인하여 코팅 공구의 인성 혹은 내칩핑성이 저하되어 결국 공구의 수명이 현저히 감소되는 경우가 종종 나타난다.Especially for aluminum oxide films, ) Or kappa (к) phase is coated by the chemical vapor deposition method, these aluminum oxide coating layer has excellent wear resistance and can greatly improve the performance by coating on the tool, but the toughness of the coating material itself and rough surface condition as described above Due to this, the toughness or chipping resistance of the coated tool is lowered, and thus the tool life is often significantly reduced.
이에 본 발명은 상기한 종래의 문제점을 개선하기 위해 안출한 것으로, 절삭공구 모재표면에 코팅 표층의 예 각 돌출부를 평탄되게 표면처리 함에따라, 피가공물 절삭시 종래의 뾰족한 돌출부에 따른 미세입자에 걸리는 응력을 분산시켜 주므로써 공구의 내칩핑성과 인성(충격성)을 향상시키는데 적합한 코팅 절삭 공구를 제공하고자 하는데 그 목적이 있다.Accordingly, the present invention has been made to improve the above-described problems, and according to the surface treatment of each projecting portion of the coating surface layer on the surface of the cutting tool base material, the workpiece is caught by the fine particles according to the conventional sharp protrusions It is an object of the present invention to provide a coated cutting tool suitable for improving chipping resistance and toughness (impact) by dispersing stress.
이와 같은 목적 달성을 위한 본 발명은, 절삭 공구의 표면에 금속 화합물을 코팅함에 있어서, 코팅후 코팅된 최외곽의 돌출부를 물리적인 방법으로 평탄하게 제거하는 방법으로 이루어진다.The present invention for achieving the above object, in the coating of the metal compound on the surface of the cutting tool, consists of a method of removing the outermost protrusions coated after the coating by a physical method.
제2도는 본 발명에 따른 표면층인 최외곽의 돌출부를 평탄면(4)으로한 상태를 나타낸 것이다.2 shows a state in which the outermost protrusion, which is the surface layer according to the present invention, is a flat surface 4.
이와 같은 표면 상태를 갖는 절삭 공구를 사용함에 따라 공구의 안정된 마모를 가능하게 함으로써 공구 성능이 향상될 수 있다.By using a cutting tool having such a surface condition, the tool performance can be improved by enabling stable wear of the tool.
본 발명에 이용되는 절삭 공구는 주철, 강 등과 같은 피삭재를 절삭 가공할 수 있는 모재 및 표면층을 갖는 성분이면 모두 적용 가능하다.The cutting tool used in the present invention can be used as long as it is a component having a base material and a surface layer capable of cutting a workpiece such as cast iron, steel, or the like.
따라서 모재 및 표면층의 성분을 어느 하나에 국한하지 않는다.Therefore, the components of the base material and the surface layer are not limited to any one.
즉, 본 발명은 표면 코팅층이 불규칙하게 뾰족한 돌출부를 갖는 대상에 적용하는데 요체가 있으므로, 대상의 성분에는 큰 문제가 없다.That is, in the present invention, there is a major problem in that the surface coating layer is applied to an object having irregularly pointed protrusions, and therefore, there is no problem in the component of the object.
다음은 실시예에 따라 설명한다.The following is described according to the embodiment.
[실시예 1]Example 1
초경합금으로된 모재위에 산화알루미늄막을 화학증착법에 의하여 약 7㎛ 코팅하여 절삭 공구를 제조하였다.A cutting tool was prepared by coating an aluminum oxide film on the base material of cemented carbide by chemical vapor deposition at about 7 μm.
제조한 코팅절삭공구의 인선부위를 diamond paste와 연마천으로 문질러 코팅층 표면부의 뾰족한 부분을 제거하고 세척한 후 자동차 부품인 브레이크 드럼 절삭가공 시험을 하여 종래의 처리하지 않은 공구와 절삭 성능을 비교하였다.The cutting edge of the coated cutting tool was rubbed with diamond paste and abrasive cloth to remove the pointed portion of the surface of the coating layer, and then the brake drum cutting test, which is an automotive part, was compared to the conventional untreated tool and the cutting performance was compared.
절삭 성능은 수량에 의해 비교하였으며 다음 표에 그 결과를 나타내었다.Cutting performance was compared by quantity and the results are shown in the following table.
비교시험 결과 종래와 같이 처리하지 않은 공구는 피삭재를 4-5개 가공하였으나, 본 발명에 의한 처리를 실시한 공구는 8-10개를 가공하였다.As a result of the comparative test, the tools not treated as in the prior art processed 4-5 workpieces, but the tools subjected to the present invention processed 8-10.
공구의 마모된 상태를 비교하여 보면 종래와 같이 처리하지 않은 공구는 초기 칩핑 발생이 심하였으나, 본 발명에 의한 표면 처리를 실시한 공구는 칩핑이 발생하지 않거나 발생하더라도 크기가 훨씬 작게 발생되었다.In comparison with the worn state of the tool, the tool which was not treated as in the prior art had severe initial chipping, but the tool which was subjected to the surface treatment according to the present invention was much smaller in size even if no chipping occurred or occurred.
따라서 본 발명에 의한 코팅 처리를 하므로써 공구의 수명이 현저히 향상됨을 알 수 있다.Therefore, it can be seen that the life of the tool is remarkably improved by the coating treatment according to the present invention.
[실시예 2]Example 2
화학증착법에 의하여 외각에상의 산화알루미늄층을 코팅하여 절삭 공구를 제조한 후, 연마재가 도포된 브러시(brush)를 사용하는 통상의 호닝(honing)방법으로 코팅 표면 및 인선부를 호닝한 후 초음파 세척을 실시하여 처리를 하지 않은 시편과 상호 비교하였다.On the outer surface by chemical vapor deposition After manufacturing a cutting tool by coating a layer of aluminum oxide on the top, the coating surface and edges are honed by a conventional honing method using a brush coated with an abrasive, and then ultrasonic cleaning is not performed. Comparison was made with the specimens.
비교결과 처리 후의 시편 표면은 외관상으로도 광택이 나고 미려하였으며, 절삭시험 결과도 본 처리에 의하여 상당히 향상되는 결과를 보여주었다.As a result, the surface of the specimen after treatment was shiny and beautiful in appearance, and the cutting test result showed a significant improvement by this treatment.
절삭 시험은 선반에서 주철(FC30)과 강(S45C)을 피삭재로 하여 행하였다.The cutting test was performed using cast iron (FC30) and steel (S45C) as workpieces on a lathe.
제3도는 내마모성 시험 결과를 공구의 측면 마모량(flank wear)으로 나타내었으며, 제4도에 내충격성 시험 결과를 파손 시까지의 충격 회수로 나타내었다.FIG. 3 shows the wear resistance test results as flank wear of the tool, and the impact resistance test results in FIG. 4 as the number of impacts until breakage.
여기서 시편 1 및 1A, 1B, 1C, 1D는 본 발명에 의한 방법으로 코팅 후 표면 처리한 시편이고, 시편 2 및 2A, 2B, 2C, 2D는 처리하지 않은 종래의 절삭 공구 시편이다.Here, specimens 1 and 1A, 1B, 1C, and 1D are specimens coated and coated by the method according to the present invention, and specimens 2 and 2A, 2B, 2C, and 2D are conventional cutting tool specimens not treated.
제3도와 제4도에서 보는 바와 같이 본 발명에 의한 표면 처리 방법으로 처리된 시편이 내마모성 및 내결손성이 모두 우수한 것을 보여주고 있다.As shown in FIG. 3 and FIG. 4, the specimen treated by the surface treatment method according to the present invention shows that both the wear resistance and the fracture resistance are excellent.
따라서 본 발명에 의한 방법으로 처리하는 것이 처리하지 않은 절삭 공구에 비하여 성능 향상되는 장점이 있음을 알 수 있다.Therefore, it can be seen that the treatment by the method according to the present invention has an advantage of improving performance compared to uncut cutting tools.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960001602A KR100187564B1 (en) | 1996-01-25 | 1996-01-25 | Processing for cutting tool surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960001602A KR100187564B1 (en) | 1996-01-25 | 1996-01-25 | Processing for cutting tool surface |
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| Publication Number | Publication Date |
|---|---|
| KR970059307A KR970059307A (en) | 1997-08-12 |
| KR100187564B1 true KR100187564B1 (en) | 1999-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960001602A KR100187564B1 (en) | 1996-01-25 | 1996-01-25 | Processing for cutting tool surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010047431A1 (en) | 2008-10-21 | 2010-04-29 | Taegutec. Ltd. | Cutting tool and method for treating surface thereof |
-
1996
- 1996-01-25 KR KR1019960001602A patent/KR100187564B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010047431A1 (en) | 2008-10-21 | 2010-04-29 | Taegutec. Ltd. | Cutting tool and method for treating surface thereof |
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| Publication number | Publication date |
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| KR970059307A (en) | 1997-08-12 |
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