JPH08150502A - Cutting tool excellent in resistance to chipping and abrasion - Google Patents
Cutting tool excellent in resistance to chipping and abrasionInfo
- Publication number
- JPH08150502A JPH08150502A JP31931494A JP31931494A JPH08150502A JP H08150502 A JPH08150502 A JP H08150502A JP 31931494 A JP31931494 A JP 31931494A JP 31931494 A JP31931494 A JP 31931494A JP H08150502 A JPH08150502 A JP H08150502A
- Authority
- JP
- Japan
- Prior art keywords
- shape line
- cutting tool
- flank
- less
- 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.)
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- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は切削工具に関する。より
詳細には、焼結合金により形成され、高い耐欠損性と高
い耐摩耗性とを兼ね備えた新規な切削工具の構成に関す
る。FIELD OF THE INVENTION This invention relates to cutting tools. More specifically, the present invention relates to a structure of a novel cutting tool which is formed of a sintered alloy and has both high fracture resistance and high wear resistance.
【０００２】[0002]
【従来の技術】焼結硬質合金は、製造方法によって、最
表面にCo、Niを主成分とする金属結合相層による表面軟
化層を形成させたり、間にＷＣ等を主成分とする層を挟
んだCo、Niを主成分とする複数の金属結合層の積層構造
からなる表面軟化層を形成させたりすることができる。
この軟化層を有する焼結硬質合金は、表面軟化層の直下
に合金内で最も高硬度な部位が存在するので優れた耐摩
耗性を発揮し、耐摩耗性に優れた工具の材料として実用
化されている。尚、切削工具として用いられる焼結硬質
合金の場合、上記のような表面軟化層の厚さは通常１μ
ｍ〜15μｍ程度である。2. Description of the Related Art Sintered hard alloys have a surface softening layer formed by a metal binder phase layer containing Co and Ni as main components, or a layer containing WC as a main component, depending on the manufacturing method. It is possible to form a surface softening layer having a laminated structure of a plurality of metal bonding layers containing Co and Ni as main components sandwiched therebetween.
Sintered hard alloys with this softening layer exhibit excellent wear resistance because the hardest part of the alloy exists immediately below the surface softening layer, and it is put to practical use as a tool material with excellent wear resistance. Has been done. In the case of a sintered hard alloy used as a cutting tool, the thickness of the surface softening layer as described above is usually 1 μm.
It is about m to 15 μm.
【０００３】[0003]
【発明が解決しようとする課題】上記のように、表面軟
化層を設けた硬質焼結合金により形成された切削工具は
耐摩耗性に優れている。しかしながら、この種の表面軟
化層を備えた焼結硬質合金の切削工具は突発的に欠損を
発生することが知られており、耐欠損性については依然
として問題を残している。As described above, the cutting tool formed of the hard sintered alloy provided with the surface softening layer has excellent wear resistance. However, it is known that a cutting tool made of a sintered hard alloy provided with this kind of surface softening layer suddenly causes a defect, and the defect resistance still remains a problem.
【０００４】そこで、本発明は、上記従来技術の問題点
を解決し、従来から優れている耐摩耗性を劣化させるこ
となく、更に、焼結硬質合金により形成された切削工具
の耐欠損性を向上させることを目的としている。Therefore, the present invention solves the above-mentioned problems of the prior art, and does not deteriorate the wear resistance, which has been excellent in the prior art, and further improves the fracture resistance of the cutting tool formed of the sintered hard alloy. The purpose is to improve.
【０００５】[0005]
【課題を解決するための手段】本発明に従うと、周期律
表第４ａ族、第５ａ族および第６ａ族から選択された少
なくとも２種類の遷移金属の炭化物、窒化物または炭窒
化物若しくはこれらの複合炭窒化物を少なくとも１種類
含む硬質相と、NiおよびCo並びに不可避的不純物を含
み、表面近傍に形成された金属結合相層を有する焼結硬
質合金により形成され、該焼結硬質合金の表面に形成さ
れた互いに交差する掬い面および逃げ面と、該掬い面お
よび該逃げ面が交差する角部をホーニング処理すること
により形成された所定の形状線をなす処理面を有する切
刃稜とを備えた切削工具において、該形状線を含む任意
の断面において、該掬い面および逃げ面の表面近傍に形
成された該金属結合相層の厚さがそれぞれ１μｍ以上15
μｍ以下であり、該処理面の両端に露出する該金属結合
相層の側方端面がひとつの形状線上で占める長さの和Ｌ
1 ＋Ｌ2 が該形状線の全長Ｌ0 の20％以下であり、該形
状線上の他の領域には金属結合相層が存在しないことを
特徴とする切削工具が提供される。According to the present invention, a carbide, nitride or carbonitride of at least two transition metals selected from Groups 4a, 5a and 6a of the Periodic Table or a combination thereof. A hard phase containing at least one composite carbonitride, and a sintered hard alloy containing Ni and Co and inevitable impurities and having a metallic binder phase layer formed in the vicinity of the surface, the surface of the sintered hard alloy A scooping surface and a flank surface that intersect with each other, and a cutting edge having a processing surface forming a predetermined shape line formed by honing the corner portion where the scooping surface and the flank surface intersect. In the provided cutting tool, the thickness of the metal binder phase layer formed in the vicinity of the surfaces of the scooping surface and the flank surface is 1 μm or more in any cross section including the shape line.
μm or less, and the sum L of the lengths of the lateral end faces of the metal-bonded phase layer exposed at both ends of the treated surface on one shape line
There is provided a cutting tool characterized in that 1 + L 2 is 20% or less of the total length L 0 of the shape line, and a metal binder phase layer is not present in other regions on the shape line.
【０００６】[0006]
【作用】前述のような表面軟化層が切削加工時に果たす
役割について詳細に検討したところ、切削時の衝撃、特
に切屑による衝撃を緩和して、切削工具の靭性を向上さ
せる機能があり、表面軟化層直下の高硬度部位が耐摩耗
性を向上させていることが判った。一方、それと同時
に、この表面軟化層が、特に切削工具の刃先部におい
て、被削材と反応し易い物質を生じ、切削工具と被削材
とが局部的に溶着するために突発的に欠損が生じること
も判った。[Function] When the role of the surface softening layer as described above is studied in detail, it has the function of reducing the impact during cutting, especially the impact due to chips, and improving the toughness of the cutting tool. It was found that the high hardness portion just below the layer improved the wear resistance. On the other hand, at the same time, this surface softening layer produces a substance that easily reacts with the work material, especially at the cutting edge of the cutting tool, and the cutting tool and the work material are locally welded to each other, causing a sudden loss. I also knew that it would happen.
【０００７】そこで、表面軟化層の長所を活かしつつ、
上記のような溶着による欠損の発生を防止することがで
きる構造を種々検討した結果、溶着欠損の生じ易い掬い
面と逃げ面との交差部分から表面軟化層を除去すること
により、溶着による欠損の発生を極めて効果的に防止で
きることが判った。Therefore, while taking advantage of the advantages of the surface softening layer,
As a result of various studies on the structure capable of preventing the occurrence of defects due to welding as described above, by removing the surface softening layer from the intersection of the scooping surface and flank where welding defects are likely to occur, the defects due to welding can be eliminated. It has been found that the occurrence can be prevented very effectively.
【０００８】即ち、本発明に係る切削工具においては、
ホーニング処理により形成される処理面上の主要部分に
は、実質的に軟化層が形成されないように構成されてい
る。このような構成により、従来の切削工具において溶
着が発生し易かった処理面の主要部には、溶着欠損の原
因となる表面軟化層が存在せず、欠損の発生が激減す
る。That is, in the cutting tool according to the present invention,
The main portion on the treated surface formed by the honing treatment is configured so that the softening layer is not substantially formed. With such a configuration, the surface softening layer that causes welding defects does not exist in the main part of the treated surface where welding is likely to occur in the conventional cutting tool, and the occurrence of defects is drastically reduced.
【０００９】尚、本願発明においては、処理面上の任意
の形状線上で、軟化層をなす金属結合相層が占める長さ
を20％以下に制限している。これは、具体的に後述する
ように、処理面において軟化層が占める割合がこれより
も大きくなると、軟化層の存在に起因する溶着欠損が増
加するからである。In the present invention, the length occupied by the metal binder phase layer forming the softening layer is limited to 20% or less on an arbitrary shape line on the treated surface. This is because, as will be described later in detail, when the proportion of the softened layer on the treated surface is larger than this, welding defects due to the presence of the softened layer increase.
【００１０】また、本発明の好ましい態様のひとつに従
うと、ホーニング処理による掬い面の加工量は0.05mm以
上且つ0.20mm未満に、逃げ面の加工量は0.03mm以上且つ
0.15mm未満にそれぞれ制限される。その理由は、表面軟
化層の除去に関する条件が満たされていたとしても、ホ
ーニング加工量がこの範囲よりも小さい場合は、切刃の
機械的強度が著しく低下して初期欠損を発生し易くなる
からである。逆に、加工量がこの範囲よりも大きい場合
は、切削加工時の切削抵抗が大きくなるので切刃に対す
る熱負荷が大きくなり、結果的に熱亀裂を生じ易くなる
ので、最終的に工具の大破に至るからである。According to one of the preferred embodiments of the present invention, the honing processing amount of the scooping surface is 0.05 mm or more and less than 0.20 mm, and the flank surface processing amount is 0.03 mm or more.
Each is limited to less than 0.15 mm. The reason is that even if the conditions for removal of the surface softening layer are satisfied, if the honing amount is smaller than this range, the mechanical strength of the cutting edge is remarkably reduced and the initial defect is likely to occur. Is. On the other hand, if the machining amount is larger than this range, the cutting resistance during cutting will be large and the heat load on the cutting edge will be large, resulting in the tendency to easily generate thermal cracks. Because it leads to.
【００１１】更に、上記範囲の加工量で、具体的に後述
するように、掬い面側の加工量と逃げ面側の加工量との
比を１〜5.0 程度とすることが、耐欠損性を向上させる
上で有利であることが判っている。Further, in the processing amount within the above range, as will be described later in detail, it is necessary to set the ratio of the processing amount on the scooping surface side to the processing amount on the flank surface side to about 1 to 5.0 to improve the fracture resistance. It has been found to be advantageous in improving.
【００１２】以下、具体例を参照して本発明をより具体
的に説明するが、以下の開示は本発明の一実施例に過ぎ
ず、本発明の技術的範囲を何ら限定するものではない。Hereinafter, the present invention will be described more specifically with reference to specific examples, but the following disclosure is merely one example of the present invention and does not limit the technical scope of the present invention.
【００１３】[0013]
〔実施例１〕図１は、本発明に係る切削工具の特徴部分
を拡大して示す横断面図である。[Embodiment 1] FIG. 1 is an enlarged transverse sectional view showing a characteristic portion of a cutting tool according to the present invention.
【００１４】図１(a) に示すように、この切削工具は、
焼結硬質合金２の表面に表面軟化層１を備えた焼結硬質
合金の角部において、一方の面を掬い面３とし、他方の
面を逃げ面４とし、更に角部先端にホーニング処理によ
る処理面５を形成して構成されている。ここで、処理面
５の両端には、掬い面３および逃げ面４の表面軟化層１
の側方端面が露出しているが、表面軟化層の側方端面の
露出部分の長さＬ1 、Ｌ2 の合計は、処理面の形状線の
長さＬ0 の20％を越えない。また、前述のように、掬い
面３側のホーニング加工量ａと、逃げ面４側のホーニン
グ加工量ｂとは、それぞれ所定の範囲内であることが好
ましい。更に、加工量ａと加工量ｂとの比も１〜５の範
囲内とすることが好ましい。As shown in FIG. 1 (a), this cutting tool is
In the corner portion of the sintered hard alloy having the surface softening layer 1 on the surface of the sintered hard alloy 2, one surface is used as the scooping surface 3, the other surface is used as the flank surface 4, and the corner tip is subjected to honing treatment. The processing surface 5 is formed. Here, the surface softening layer 1 of the scooping surface 3 and the flank surface 4 is provided at both ends of the treated surface 5.
Although the side end surface of the surface softening layer is exposed, the total length L 1 and L 2 of the exposed side end surface of the surface softening layer does not exceed 20% of the length L 0 of the shape line of the treated surface. Further, as described above, it is preferable that the honing processing amount a on the scooping surface 3 side and the honing processing amount b on the flank surface 4 side are each within a predetermined range. Further, it is preferable that the ratio between the processing amount a and the processing amount b is also within the range of 1 to 5.
【００１５】尚、図１(b) に示すように、この種の焼結
硬質合金では、表面軟化層１が、複数の金属結合相層11
と、その間に間挿されたＷＣを主成分とする層12とから
なる積層構造として形成される場合もある。この場合
は、複数の金属結合相層11とその間に間挿されたＷＣ層
12とを合わせた全体をひとつの表面軟化層と見做す。As shown in FIG. 1 (b), in this kind of sintered hard alloy, the surface softening layer 1 is composed of a plurality of metal binding phase layers 11
In some cases, it is formed as a laminated structure including a layer 12 containing WC as a main component and interposed between the layers. In this case, a plurality of metal-bonded phase layers 11 and a WC layer interposed therebetween
The whole of 12 and 12 is regarded as one surface softening layer.
【００１６】〔作製例〕下記の表１に示す原料粉末Ａお
よびＢの２種類の原料粉末を用意した。[Manufacturing Example] Two kinds of raw material powders A and B shown in Table 1 below were prepared.
【００１７】[0017]
【表１】 [Table 1]
【００１８】上記のような２種の原料粉末を、それぞれ
湿式混合の後に、ＳＮＭＧ432 型の形状に型押し成形
し、真空下で1400℃で１時間焼結した。焼結の結果得ら
れた焼結耐の表面の組成と特性を下記の表２に示す。The above-mentioned two kinds of raw material powders were each wet-mixed, and then pressed and molded into an SNMG432 mold shape and sintered under vacuum at 1400 ° C. for 1 hour. Table 2 below shows the composition and characteristics of the sinter-resistant surface obtained as a result of sintering.
【００１９】[0019]
【表２】 [Table 2]
【００２０】尚、上記表２において、表面軟化層の構造
は、各層において最も体積比率が高いもので表してい
る。また、〔Ni＋Co〕なる表示は、２つの組成を合わせ
て最も体積比率が高いことを意味している。In Table 2, the structure of the surface softening layer is represented by the layer having the highest volume ratio. Further, the expression [Ni + Co] means that the two compositions have the highest volume ratio.
【００２１】上記各原料粉末Ａ、Ｂに由来する各焼結体
について、下記の表３に示す条件でホーニング処理を行
って切削工具を作製した。尚、占有率とは、ホーニング
処理により形成された処理面上の任意の形状線上で表面
軟化層が占める長さを意味している。また、試料番号の
左に "※" が付いている試料は、本発明の範囲外の仕様
を有する比較試料である。Each sintered body derived from each raw material powder A, B was subjected to a honing treatment under the conditions shown in Table 3 below to produce a cutting tool. The occupancy means the length occupied by the surface softening layer on an arbitrary shape line on the treated surface formed by the honing treatment. The sample marked with "*" to the left of the sample number is a comparative sample having specifications outside the scope of the present invention.
【００２２】[0022]
【表３】 [Table 3]
【００２３】〔実施例２／評価１〕表３に示した各仕様
の試料を使用して、ＳＣＭ435(ＨＢ：250)の長手方向に
４本の溝付丸棒を切削する加工により切削靭性試験を行
い、各試料の耐欠損性を比較した。加工の条件は下記の
表４に示す通りである。また、評価結果を表５に示す。
尚、評価は、20個の切刃に対して欠損の発生した切刃の
数で表わしている。また、試料番号の左に "※" が付い
ている試料は、本発明の範囲外の仕様を有する比較試料
である。Example 2 / Evaluation 1 A cutting toughness test was carried out by cutting four round bar rods with grooves in the longitudinal direction of SCM435 (HB: 250) using samples of each specification shown in Table 3. Then, the fracture resistance of each sample was compared. The processing conditions are as shown in Table 4 below. The evaluation results are shown in Table 5.
Note that the evaluation is represented by the number of cutting edges having a defect with respect to 20 cutting edges. The sample marked with "*" to the left of the sample number is a comparative sample having specifications outside the scope of the present invention.
【００２４】[0024]
【表４】 [Table 4]
【００２５】[0025]
【表５】 [Table 5]
【００２６】〔実施例３／評価２〕表３に示した各仕様
の試料を使用して、ＳＣＭ435(ＨＢ：250)の丸棒を切削
する加工により切削耐摩耗試験を行い、各試料の耐摩耗
性を比較した。加工の条件は下記の表６に示す通りであ
る。また、評価結果を表７に示す。尚、評価は、20個の
切刃について各試料の逃げ面の摩耗量の平均値〔mm〕で
表している。また、試料番号の左に "※" が付いている
試料は、本発明の範囲外の仕様を有する比較試料であ
る。[Example 3 / Evaluation 2] Using the samples having the respective specifications shown in Table 3, a cutting and abrasion resistance test was conducted by cutting a round bar of SCM435 (HB: 250), and the resistance of each sample was evaluated. The wear properties were compared. The processing conditions are as shown in Table 6 below. The evaluation results are shown in Table 7. The evaluation is represented by the average value [mm] of the wear amount of the flank of each sample for 20 cutting edges. The sample marked with "*" to the left of the sample number is a comparative sample having specifications outside the scope of the present invention.
【００２７】[0027]
【表６】 [Table 6]
【００２８】[0028]
【表７】 [Table 7]
【００２９】〔実施例４／評価３〕表３に示した試料の
うちＡ−１およびＢ−１の仕様を有する試料と、更に、
Ａ−１およびＢ−１の仕様を有する試料に対してラッピ
ング処理を行って表面軟化層を完全に除去した試料Ｃ−
１およびＤ−１とに対して、ＳＣＭ435(ＨＢ：250)の長
手方向に４本の溝付丸棒を切削する加工により切削靭性
試験を行い、各試料の耐欠損性を比較した。加工の条件
は下記の表８に示す通りである。また、評価結果を表９
に示す。尚、評価は20個の切刃に欠損が生じた個数で表
わしている。また、試料番号の左に "※" が付いている
試料は、本発明の範囲外の仕様を有する比較試料であ
る。[Example 4 / Evaluation 3] Of the samples shown in Table 3, samples having specifications A-1 and B-1 and further
Sample C- in which the surface softening layer was completely removed by lapping the samples having the specifications of A-1 and B-1
1 and D-1 were subjected to a cutting toughness test by a process of cutting four grooved round bars in the longitudinal direction of SCM435 (HB: 250) to compare the fracture resistance of each sample. The processing conditions are as shown in Table 8 below. Table 9 shows the evaluation results.
Shown in The evaluation is represented by the number of defects in 20 cutting edges. The sample marked with "*" to the left of the sample number is a comparative sample having specifications outside the scope of the present invention.
【００３０】[0030]
【表８】 [Table 8]
【００３１】[0031]
【表９】 [Table 9]
【００３２】〔実施例５／評価４〕表１に示した原料粉
末により、表２に示した構造と組成を有するＡおよびＢ
の焼結体に対して、下記の表10に示す条件でホーニング
処理を行って切削工具を小作製した。[Example 5 / Evaluation 4] A and B having the structures and compositions shown in Table 2 were prepared from the raw material powders shown in Table 1.
A honing process was performed on the sintered body of No. 1 under the conditions shown in Table 10 below to make a small cutting tool.
【００３３】[0033]
【表１０】 [Table 10]
【００３４】〔評価４〕上記の各切削工具を使用して、
ＳＣＭ435(ＨＢ：250)の長手方向に４本の溝付丸棒を
切削する加工により切削靭性試験を行い各試料の耐欠損
性を比較した。加工の条件は下記の表11に示す通りであ
る。また、評価結果を表12に示す。尚、評価は、20個の
切刃に対して欠損の発生した切刃の数で表わしている。
また、試料番号の左に "※" が付いている試料は、本発
明の範囲外の仕様を有する比較試料である。[Evaluation 4] Using each of the above cutting tools,
A cutting toughness test was conducted by cutting four grooved round bars in the longitudinal direction of SCM435 (HB: 250) to compare the fracture resistance of each sample. The processing conditions are as shown in Table 11 below. The evaluation results are shown in Table 12. Note that the evaluation is represented by the number of cutting edges having a defect with respect to 20 cutting edges.
The sample marked with "*" to the left of the sample number is a comparative sample having specifications outside the scope of the present invention.
【００３５】[0035]
【表１１】 [Table 11]
【００３６】[0036]
【表１２】 [Table 12]
【００３７】〔評価５〕表10に示した各仕様の試料を使
用して、ＳＣＭ435(ＨＢ：250)の丸棒を切削する加工に
より切削耐摩耗試験を行い、各試料の耐摩耗性を比較し
た。加工の条件は下記の表13に示す通りである。また、
評価結果を表14に示す。尚、評価は、20個の切刃につい
て各試料の逃げ面の摩耗量の平均値〔mm〕で表してい
る。また、試料番号の左に "※" が付いている試料は、
本発明の範囲外の仕様を有する比較試料である。[Evaluation 5] Using the samples of each specification shown in Table 10, a cutting and abrasion resistance test was conducted by cutting a round bar of SCM435 (HB: 250) to compare the abrasion resistance of each sample. did. The processing conditions are as shown in Table 13 below. Also,
The evaluation results are shown in Table 14. The evaluation is represented by the average value [mm] of the wear amount of the flank of each sample for 20 cutting edges. In addition, for samples with "*" to the left of the sample number,
It is a comparative sample having specifications outside the scope of the present invention.
【００３８】[0038]
【表１３】 [Table 13]
【００３９】[0039]
【表１４】 [Table 14]
【００４０】[0040]
【発明の効果】以上詳細に説明したように、本発明に係
る切削工具は、表面軟化層を備えた焼結硬質合金の切削
工具が従来から備えていた耐摩耗性を全く損なうことな
く、更に、高い耐欠損性を有している。従って、本願発
明は、切削加工の高能率化のみならず、無人加工化等に
も寄与するものである。As described in detail above, the cutting tool according to the present invention does not impair the wear resistance which the cutting tool of the sintered hard alloy having the surface softening layer has conventionally provided, and further, , Has high fracture resistance. Therefore, the invention of the present application contributes not only to high efficiency of cutting but also to unmanned processing.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明に係る切削工具の構成を模式的に示す断
面図である。FIG. 1 is a cross-sectional view schematically showing a configuration of a cutting tool according to the present invention.
１・・・表面軟化層（金属結合層）、 ２・・・焼結硬
質合金層（ＷＣ層）、３・・・掬い面、
４・・・逃げ面、５・・・処理面、11・・・金属
結合層、 12・・・ＷＣ層1 ... surface softening layer (metal bonding layer), 2 ... sintered hard alloy layer (WC layer), 3 ... scooping surface,
4 ... Relief surface, 5 ... Treatment surface, 11 ... Metal bonding layer, 12 ... WC layer
Claims (4)
族から選択された少なくとも２種類の遷移金属の炭化
物、窒化物または炭窒化物若しくはこれらの複合炭窒化
物を少なくとも１種類含む硬質相と、NiおよびCo並びに
不可避的不純物を含み、表面近傍に形成された金属結合
相層を有する焼結硬質合金により形成され、 該焼結硬質合金の表面に形成された互いに交差する掬い
面および逃げ面と、該掬い面および該逃げ面が交差する
角部をホーニング処理することにより形成された所定の
形状線をなす処理面を有する切刃稜とを備えた切削工具
において、 該形状線を含む任意の断面において、該掬い面および逃
げ面の表面近傍に形成された該金属結合相層の厚さがそ
れぞれ１μｍ以上15μｍ以下であり、該処理面の両端に
露出する該金属結合相層の側方端面がひとつの形状線上
で占める長さの和Ｌ1 ＋Ｌ2 が該形状線の全長Ｌ0 の20
％以下であり、該形状線上の他の領域には金属結合相層
が存在しないことを特徴とする切削工具。1. A group 4a, 5a and 6a of the periodic table.
A hard phase containing at least one kind of carbide, nitride or carbonitride of at least two kinds of transition metals selected from the group, and Ni, Co and unavoidable impurities and formed near the surface Formed by a sintered hard alloy having a metal-bonded phase layer formed on the surface of the sintered hard alloy, and a scooping surface and a flank formed on the surface of the sintered hard alloy, and a corner portion where the scooping surface and the flank intersect. A cutting tool provided with a cutting edge having a processing surface forming a predetermined shape line formed by honing, in the vicinity of the scooping surface and the flank surface in an arbitrary cross section including the shape line. has been the thickness of the metal binder phase layer is at 1μm or more 15μm or less, the metal binder phase layer sum L 1 side end face length of occupied of a shape line of the exposed both ends of the treated surface 20 L 2 is the total length L 0 of the shape line
% Or less, and a metal binder phase layer does not exist in other regions on the shape line.
族から選択された少なくとも２種類の遷移金属の炭化
物、窒化物または炭窒化物若しくはこれらの複合炭窒化
物を少なくとも１種類含む硬質相と、NiおよびCo並びに
不可避的不純物を含み表面近傍に形成された金属結合相
層がＷＣを主成分とする層を間に挟み込んだ積層構造を
有する焼結硬質合金により形成され、 該焼結硬質合金の表面に形成された互いに交差する掬い
面および逃げ面と、該掬い面および該逃げ面が交差する
角部をホーニング処理することにより形成された所定の
形状線をなす処理面を有する切刃稜とを備えた切削工具
において、 該形状線を含む任意の横断面において、該積層構造の厚
さが１μｍ以上15μｍ以下であり、該処理面の両端に露
出する該積層構造の側方端面がひとつの形状線上で占め
る長さの和Ｌ1 ＋Ｌ2 が該形状線の全長Ｌ0 の20％以下
であり、該形状線上の他の領域には積層構造が存在しな
いことを特徴とする切削工具。2. Periodic table groups 4a, 5a and 6a.
A hard phase containing at least one kind of carbide, nitride or carbonitride of at least two transition metals selected from the group, and Ni and Co and inevitable impurities and formed near the surface And a metal binding phase layer formed of a sintered hard alloy having a laminated structure in which a layer containing WC as a main component is sandwiched therebetween, and a scooping surface and a flank surface formed on the surface of the sintered hard alloy and intersecting each other. A cutting tool edge having a processing surface forming a predetermined shape line formed by honing the corner portion where the scooping surface and the flank surface intersect, and a cutting tool including any shape line In the cross-section, the thickness of the laminated structure is 1 μm or more and 15 μm or less, and the sum L 1 + L 2 of the lengths of the lateral end faces of the laminated structure exposed on both ends of the treated surface on one shape line is form 20% or less of the total length L 0 of the line, the cutting tool is in the other areas of the shape line, characterized in that there are no stacked structure.
工具において、前記形状線上での前記掬い面のホーニン
グ加工量が0.05mm以上且つ0.20mm未満であり、該形状線
上での前記逃げ面のホーニング加工量が0.03mm以上且つ
0.15mm未満であることを特徴とする切削工具。3. The cutting tool according to claim 1 or 2, wherein the honing amount of the scooping surface on the shape line is 0.05 mm or more and less than 0.20 mm, and the clearance on the shape line is obtained. The honing amount of the surface is 0.03 mm or more and
Cutting tool characterized by being less than 0.15 mm.
記載された切削工具において、前記形状線上での前記掬
い面のホーニング加工量ａおよび該形状線上での前記逃
げ面の加工量ｂの比ａ／ｂが１以上、５以下であること
を特徴とする切削工具。4. A cutting tool according to any one of claims 1 to 3, wherein the honing amount a of the scooping surface on the shape line and the flank surface on the shape line. A cutting tool characterized in that the ratio a / b of the amount b is 1 or more and 5 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31931494A JPH08150502A (en) | 1994-11-29 | 1994-11-29 | Cutting tool excellent in resistance to chipping and abrasion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31931494A JPH08150502A (en) | 1994-11-29 | 1994-11-29 | Cutting tool excellent in resistance to chipping and abrasion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08150502A true JPH08150502A (en) | 1996-06-11 |
Family
ID=18108819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31931494A Pending JPH08150502A (en) | 1994-11-29 | 1994-11-29 | Cutting tool excellent in resistance to chipping and abrasion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08150502A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0812650A2 (en) * | 1996-06-12 | 1997-12-17 | Sumitomo Electric Industries, Ltd. | Coated hard metal tool |
| JP2001341004A (en) * | 2000-05-31 | 2001-12-11 | Sumitomo Electric Ind Ltd | Coated cutting tool |
| US7090914B2 (en) | 2000-07-12 | 2006-08-15 | Sumitomo Electric Industries, Ltd. | Coated cutting tool |
| US7431747B2 (en) * | 2003-07-15 | 2008-10-07 | Kennametal Inc. | Cutting tool and method of reducing the width of wear mark on a cutting tool |
| US7476437B2 (en) * | 2004-07-05 | 2009-01-13 | Sandvik Intellectual Property Ab | Cutting tool insert |
| JP2011093053A (en) * | 2009-10-30 | 2011-05-12 | Mitsubishi Materials Corp | Cutting tool and method for manufacturing the same |
| CN102632261A (en) * | 2012-04-26 | 2012-08-15 | 株洲精工硬质合金有限公司 | Metal ceramic cutting tool and preparation method thereof |
| WO2012124559A1 (en) * | 2011-03-15 | 2012-09-20 | 住友電工ハードメタル株式会社 | Cutting edge-replaceable cutting tool |
| JP2012245581A (en) * | 2011-05-26 | 2012-12-13 | Mitsubishi Materials Corp | Cutting insert made from surface coated titanium carbon nitride-based cermet, and method for manufacturing the same |
-
1994
- 1994-11-29 JP JP31931494A patent/JPH08150502A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0812650A2 (en) * | 1996-06-12 | 1997-12-17 | Sumitomo Electric Industries, Ltd. | Coated hard metal tool |
| EP0812650A3 (en) * | 1996-06-12 | 1998-07-29 | Sumitomo Electric Industries, Ltd. | Coated hard metal tool |
| US6082936A (en) * | 1996-06-12 | 2000-07-04 | Sumitomo Electric Industries, Ltd. | Coated hard metal tool |
| JP2001341004A (en) * | 2000-05-31 | 2001-12-11 | Sumitomo Electric Ind Ltd | Coated cutting tool |
| JP4518626B2 (en) * | 2000-05-31 | 2010-08-04 | 住友電工ハードメタル株式会社 | Coated cutting tool |
| US7090914B2 (en) | 2000-07-12 | 2006-08-15 | Sumitomo Electric Industries, Ltd. | Coated cutting tool |
| US7431747B2 (en) * | 2003-07-15 | 2008-10-07 | Kennametal Inc. | Cutting tool and method of reducing the width of wear mark on a cutting tool |
| US7476437B2 (en) * | 2004-07-05 | 2009-01-13 | Sandvik Intellectual Property Ab | Cutting tool insert |
| JP2011093053A (en) * | 2009-10-30 | 2011-05-12 | Mitsubishi Materials Corp | Cutting tool and method for manufacturing the same |
| WO2012124559A1 (en) * | 2011-03-15 | 2012-09-20 | 住友電工ハードメタル株式会社 | Cutting edge-replaceable cutting tool |
| JP2012192474A (en) * | 2011-03-15 | 2012-10-11 | Sumitomo Electric Hardmetal Corp | Cutting edge replaceable cutting tool |
| CN103429372A (en) * | 2011-03-15 | 2013-12-04 | 住友电工硬质合金株式会社 | Cutting edge-replaceable cutting tool |
| KR101540876B1 (en) * | 2011-03-15 | 2015-07-30 | 스미또모 덴꼬오 하드메탈 가부시끼가이샤 | Indexable cutting tool |
| CN103429372B (en) * | 2011-03-15 | 2015-09-30 | 住友电工硬质合金株式会社 | Turable cutting instrument |
| JP2012245581A (en) * | 2011-05-26 | 2012-12-13 | Mitsubishi Materials Corp | Cutting insert made from surface coated titanium carbon nitride-based cermet, and method for manufacturing the same |
| CN102632261A (en) * | 2012-04-26 | 2012-08-15 | 株洲精工硬质合金有限公司 | Metal ceramic cutting tool and preparation method thereof |
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