JP2621474B2 - Tungsten carbide based cemented carbide tool members with excellent wear and fracture resistance - Google Patents
Tungsten carbide based cemented carbide tool members with excellent wear and fracture resistanceInfo
- Publication number
- JP2621474B2 JP2621474B2 JP9218489A JP9218489A JP2621474B2 JP 2621474 B2 JP2621474 B2 JP 2621474B2 JP 9218489 A JP9218489 A JP 9218489A JP 9218489 A JP9218489 A JP 9218489A JP 2621474 B2 JP2621474 B2 JP 2621474B2
- Authority
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- Japan
- Prior art keywords
- based cemented
- tungsten carbide
- cemented carbide
- carbide
- cutting
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、耐摩耗性および耐欠損性にすぐれ、特に
スローアウェイチップやエンドミル、さらに小径ドリル
やドリルなどの切削工具部材、並びに絞り加工、プレス
加工および引抜き加工用ダイスや、熱間および冷間圧延
用ロール、熱間加工用ガイドローラおよびシュー、さら
に製缶用シーミングロールなどの耐摩耗工具部材などと
して適用した場合にきわめてすぐれた性能を著しく長期
に亘って発揮する炭化タングステン（以下WCで示す）基
超硬合金製工具部材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is excellent in wear resistance and fracture resistance, and is particularly useful for cutting tool members such as indexable inserts and end mills, small diameter drills and drills, and drawing, Outstanding performance when applied as wear-resistant tool members such as dies for pressing and drawing, hot and cold rolling rolls, guide rollers and shoes for hot working, and seaming rolls for can manufacturing. The present invention relates to a tool member made of tungsten carbide (hereinafter referred to as WC) based cemented carbide, which exerts a remarkably long time.
一般に、上記の各種工具部材が、粉末治金法にて、重
量％で（以下％は重量％を示す）、 結合相形成成分としてCo:1〜25％、 分散相形成成分としてＷを除く元素周期律表の4a,5a,
および6a族金属の炭化物、並びにこれらのWCを含む２種
以上の複合炭化物固溶体（以下これらを総称して「金属
炭化物」という）のうちの１種または２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するWC基超硬合金素材を成
形し、この素材に研削加工を施して所定の最終形状（寸
法）に仕上げることにより製造されることは良く知られ
るところである。In general, the above-mentioned various tool members are prepared by powder metallurgy in terms of% by weight (hereinafter,% indicates% by weight), Co: 1 to 25% as a binder phase forming component, and elements other than W as a dispersed phase forming component. 4a, 5a of the periodic table,
And / or two or more of carbides of Group 6a metals and two or more complex carbide solid solutions containing these WCs (hereinafter collectively referred to as “metal carbides”): 0.5 to 30
WC-based cemented carbide material containing the same composition as WC as a dispersed phase forming component and unavoidable impurities, and the remaining material is ground to a predetermined final shape (dimensions). It is well known that it is manufactured by finishing.
しかし、上記の各種工具部材のうち、切削工具部材と
して連続切削や断続切削に用いられているスローアウェ
イチップを例にとるならば、近年の省力化および高能率
化に対する強い要求から、これを、高速切削や、高送り
および高切込みなどの重切削に用いる傾向にあり、これ
は各種の耐摩耗工具部材に対しても同様で、使用条件が
一段と苛酷になる傾向にあるが、上記の従来WC基超硬合
金製工具部材では、耐摩耗性および耐欠損性不足が原因
で、これに十分対応することができないのが現状であ
る。However, among the various types of tool members described above, if the indexable insert used for continuous cutting or intermittent cutting is taken as an example of a cutting tool member, a strong demand for labor saving and high efficiency in recent years, They tend to be used for high-speed cutting and heavy cutting such as high feed and high depth of cut.The same applies to various wear-resistant tool members, and the use conditions tend to be more severe. At present, a base cemented carbide tool member cannot sufficiently cope with the insufficient wear resistance and chipping resistance.
そこで、本発明者等は、上述のような観点から、上記
の従来WC基超硬合金製工具部材に着目し、これの耐摩耗
性および耐欠損性の向上をはかるべく研究を行なった結
果、上記の従来WC基超硬合金製工具部材においては、そ
の表面に対するＸ線回折で、WCの（211）面に、単一の
ピーク波形か、あるいは高低差のある２つの連続ピーク
波形が現われ、かつ前記２つの連続ピーク波形の場合、
２つの連続ピーク間の谷部から高い方のピーク高さを
Ｌ、同じく低い方のピーク高さをｌとすると、L/lが40
以上になる回折曲線を示すが、これに、例えば圧力:1気
圧以下の窒素雰囲気あるいは浸炭性雰囲気などの非酸化
性雰囲気中、1000〜1500℃の範囲内の所定温度に所定時
間保持の熱処理を施すと、その表面に対するＸ線回折
で、WCの（211）面に現われる波形が、第１図に例示さ
れる通り上記の２つの連続ピーク波形ではあるが、L/l
の比が35以下の高低差の小さくなった回折曲線を示すよ
うになり、このような熱処理による波形の変化は、表面
の研削加工時に表面に圧着あるいはこれに圧入して欠け
やチッピングなどの起点となっていた切削屑が上記加熱
温度で結合相中に固溶し、冷却時に析出して結晶化する
ことによる切削屑の工具部材表面部での一体化、切削時
に発生した表面部内部歪の除去、および工具部材を構成
する分散相形成部分の部材表面部への拡散移動に伴なう
分散相濃度の高い表面硬質層の形成に原因があるものと
推定され、したがって上記熱処理後の波形を示すWC基超
硬合金製工具部材は耐欠損性にすぐれ、かつ表面硬質層
の形成によって耐摩耗性にもすぐれたものとなり、これ
を上記の各種の切削工具部材や耐摩耗工具部材などとし
て適用した場合、苛酷な使用条件下でも欠けやチッピン
グ、さらに割れなどの発生なく、すぐれた性能を長期に
亘って発揮するようになるという知見を得たのである。Thus, the present inventors have focused on the above-mentioned conventional WC-based cemented carbide tool members from the above-described viewpoints, and as a result of conducting research to improve the wear resistance and fracture resistance thereof, In the above-mentioned conventional WC-based cemented carbide tool member, a single peak waveform or two continuous peak waveforms having a height difference appear on the (211) plane of the WC by X-ray diffraction on the surface, And in the case of the two continuous peak waveforms,
Assuming that the higher peak height from the valley between two consecutive peaks is L and the lower peak height is 1, L / l is 40
The above shows a diffraction curve, for example, a pressure: 1 atm or less in a non-oxidizing atmosphere such as a nitrogen atmosphere or a carburizing atmosphere, a heat treatment held at a predetermined temperature in the range of 1000 to 1500 ° C for a predetermined time. When applied, the waveform appearing on the (211) plane of the WC in the X-ray diffraction on the surface is the above-mentioned two continuous peak waveforms as illustrated in FIG.
Shows a diffraction curve with a reduced height difference of 35 or less, and the change in waveform due to such heat treatment is caused by the starting point of chipping or chipping caused by pressing or pressing into the surface during surface grinding. The cutting chips that had become a solid solution in the binder phase at the above heating temperature, integrated on the surface of the tool member due to the precipitation and crystallization during cooling, It is presumed to be caused by the removal and the formation of a surface hard layer having a high dispersed phase concentration due to the diffusion and migration of the dispersed phase forming portion constituting the tool member to the surface of the member. The WC-based cemented carbide tool members shown are excellent in fracture resistance and wear resistance due to the formation of a hard surface layer, and are used as the above various cutting tool members and wear-resistant tool members If you do It has been found that excellent performance can be exhibited over a long period of time without causing chipping, chipping, and cracking even under severe use conditions.
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Co:1〜25％、 分散相形成成分として金属炭化物のうちの１種または
２種以上:0.5〜30％、 を含有し、残りが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するWC基超硬合金製工具部材にし
て、この工具部材は、 その表面に対するＸ線回折で、WCの（211）面に、高
低差のある２つの連続ピークからなり、かつ前記２つの
連続ピーク間の谷部から高い方のピーク高さをＬ、同じ
く低い方のピーク高さをｌとした場合、L/l:35以下を満
足する波形が現われる回折曲線を示すと共に、 その表面部に、0.5〜10μｍの平均層厚で、相対的に
分散相濃度の高い表面硬質層を形成してなる耐摩耗性お
よび耐欠損性のすぐれたWC基超硬合金製工具部材に特徴
を有するものである。The present invention has been made based on the above findings, wherein Co: 1 to 25% as a binder phase-forming component, one or more of metal carbides as a dispersed phase-forming component: 0.5 to 30%, WC-based cemented carbide having the composition consisting of WC as a disperse phase-forming component and unavoidable impurities, and this tool member was subjected to X-ray diffraction on its surface to determine the WC (211) When the surface is composed of two continuous peaks having a height difference, and the height of the higher peak from the valley between the two continuous peaks is L and the height of the lower peak is 1 as L / l, : Shows a diffraction curve that shows a waveform satisfying 35 or less, and has a surface hard layer with an average layer thickness of 0.5 to 10 μm and a relatively high concentration of dispersed phase formed on the surface, and has abrasion resistance and resistance. Features of WC based cemented carbide tool members with excellent fracture That.
つぎに、この発明の工具部材において、上記の通り数
値限定した理由を説明する。Next, the reason for limiting the numerical values of the tool member of the present invention as described above will be described.
（ａ）Co含有量 Co成分には、工具部材の靱性および強度を向上させる
作用があるが、その含有量が１％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25％を越えると
耐摩耗性が低下するようになることから、その含有量を
１〜25％と定めたものであり、特に耐摩耗性が強く要求
される切削工具部材にあっては５〜10％の含有が望まし
い。(A) Co Content The Co component has an effect of improving the toughness and strength of the tool member. However, if the content is less than 1%, the desired effect cannot be obtained in the above-mentioned effect. %, The wear resistance is reduced. Therefore, the content is specified to be 1 to 25%. % Is desirable.
（ｂ）金属炭化物の含有量 金属炭化物には、WCとの共存において耐摩耗性を一段
と向上させる作用があるが、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％を越えると靱性低下が著しいことから、その含有
量を0.5〜30％と定めた。(B) Content of metal carbide Metal carbide has an effect of further improving wear resistance in the coexistence with WC, but if its content is less than 0.5%, the desired effect of improving wear resistance cannot be obtained, On the other hand, if the content exceeds 30%, the toughness significantly decreases, so the content is set to 0.5 to 30%.
（ｃ）ピーク波形のL/l 上記の通り、従来WC基超硬合金製工具部材におけるよ
うに、L/l比が40以上では十分な耐摩耗性および耐欠損
性を示さず、上記条件での熱処理を加えて、L/l比を35
以下にすることによってはじめて、工具部材は十分な耐
摩耗性と耐欠損性をもつようになる。また、このL/l:35
以下のピーク波形は、熱処理時の加熱温度を1000℃以上
とすることにより可能となり、一方その加熱温度が1500
℃を越えると結晶粒が粗大化して強度が低下するように
なるので、前記加熱温度は1000〜1500℃とするのが望ま
しく、その場合の保持時間は、例えば切削工具部材とし
てのスローアウェイチップで30〜90分で十分である。(C) L / l of peak waveform As described above, when the L / l ratio is 40 or more, sufficient wear resistance and fracture resistance are not exhibited as in the conventional WC-based cemented carbide tool member. L / l ratio 35
Only when the following is done, the tool member will have sufficient wear resistance and fracture resistance. Also, this L / l: 35
The following peak waveform can be obtained by setting the heating temperature during the heat treatment to 1000 ° C. or higher, while the heating temperature is set to 1500
If the temperature exceeds ℃, since the crystal grains become coarse and the strength is reduced, the heating temperature is preferably set to 1000 to 1500 ° C. 30-90 minutes is enough.
（ｄ）表面硬質層の平均層厚 表面硬質相の形成は、熱処理時の加熱雰囲気、加熱温
度、および保持時間によって影響を受け、したがって、
これらの熱処理条件を適宜制御することによって所定の
層厚をもって表面硬質層を形成することができるが、そ
の厚さが平均層厚で0.5μｍ未満では所望のすぐれた耐
摩耗性を確保することができず、一方その厚さが同じく
10μｍを越えても耐摩耗性により一層の向上効果は見ら
れず、経済性も考慮して、その平均層厚を0.5〜10μｍ
と定めた。(D) Average layer thickness of the surface hard layer The formation of the surface hard phase is affected by the heating atmosphere, the heating temperature, and the holding time during the heat treatment, and therefore,
By appropriately controlling these heat treatment conditions, the surface hard layer can be formed with a predetermined layer thickness, but if the average layer thickness is less than 0.5 μm, it is possible to secure desired excellent wear resistance. I ca n’t, but the thickness is the same
Even if it exceeds 10 μm, no further improvement effect is seen due to abrasion resistance.
It was decided.
つぎに、この発明の工具部材を実施例により具体的に
説明する。Next, the tool member of the present invention will be specifically described with reference to examples.
実施例１ 原料粉末として、いずれも0.5〜10μｍの範囲内の所
定の平均粒径を有するWC粉末、各種の金属炭化物粉末、
およびCo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、ボールミルで72時間湿
式混合し、乾燥した後、1.5ton/cm2の圧力で圧粉体にプ
レス成形し、この圧粉体を、１×10-3torrの真空中、13
50〜1500℃の範囲内の所定温度に90分間保持の条件で焼
結して配合組成と実質的に同一の成分組成をもったWC基
超硬合金工具素材を成形し、この素材の上下面および外
周面に切削加工を施して、CIS（超硬工具協会）規格SPP
422の形状をもった切削工具部材としてのスローアウェ
イチップ（このチップは従来スローアウェイチップに相
当するものなので、以下従来切削チップという）１〜12
を製造し、引続いてこれら従来切削チップ１〜12のそれ
ぞれの半分を用い、これに第１表に示される条件で熱処
理を施すことにより本発明切削チップ１〜12をそれぞれ
製造した。Example 1 As raw material powders, WC powders each having a predetermined average particle size in the range of 0.5 to 10 μm, various metal carbide powders,
And Co powder are prepared.
Compounded in the composition shown in the table, wet-mixed in a ball mill for 72 hours, dried, pressed into a green compact at a pressure of 1.5 ton / cm 2 , and this green compact was 1 × 10 -3 torr In a vacuum of 13
Sintering is performed at a predetermined temperature within the range of 50 to 1500 ° C for 90 minutes to form a WC-based cemented carbide tool material having substantially the same composition as the compounded composition. And CIS (Carbide Tool Association) standard SPP
A throw-away insert as a cutting tool member having a shape of 422 (this insert corresponds to a conventional throw-away insert, and is hereinafter referred to as a conventional insert).
And then heat-treating them under the conditions shown in Table 1 to produce cutting chips 1 to 12 of the present invention, respectively.
ついで、この結果得られた各種の切削チップについ
て、ロックウェル硬さ（Ａスケール）を測定すると共
に、表面硬質層の有無について観察し、表面硬質層形成
の場合はその平均層厚を測定し、さらにチップ表面に対
して、 管 球:Cu 、フィルタ:Ni、 管電圧:40kV、管電流 :40mA.、 時定数:5、 レコーダー速度:40mm/2θ（度）、 レコーダーフルスケール:10000cps、 の条件でＸ線回折を施して回折曲線を求め、この回折曲
線からWCの（211）面に現われた波形のL/l比を算出し
た。Next, the Rockwell hardness (A scale) of the various cutting tips obtained as a result was measured, and the presence or absence of a hard surface layer was observed. When a hard surface layer was formed, the average layer thickness was measured. With respect to the chip surface, tube: Cu, filter: Ni, tube voltage: 40kV, tube current: 40mA., Time constant: 5, recorder speed: 40mm / 2θ (degrees), recorder full scale: 10,000cps X-ray diffraction was performed to obtain a diffraction curve, and the L / l ratio of the waveform appearing on the (211) plane of the WC was calculated from the diffraction curve.
さらに、上記の各種の切削チップについて、 被削材:SNCM439（硬さ：HB250）の丸棒、 切削速度:140m/min、 送り:0.2mm/rev.、 切込み:1.5mm、 切削時間:30min、 の条件での鋼の乾式高切込み連続切削試験を行ない、切
刃の逃げ面摩耗幅とすくい面摩耗深さを測定して耐摩耗
性を評価し、さらに、 被研材:SNCM439（硬さ：HB260）の溝入材、 切削速度:130m/min、 送り:0.35mm/rev.、 切込み:2mm、 切削時間:3min、 の条件での鋼の乾式高送り断続切削試験を行ない、切刃
10個のうちの欠損発生数を測定して耐欠損性を評価し
た。これらの結果を第１表に示した。Furthermore, the above-mentioned various cutting inserts, a workpiece: SNCM439 (Hardness: H B 250) round bar, Cutting speed: 140 m / min, Feed:. 0.2 mm / rev, cut: 1.5 mm Cutting Time: A dry high-cutting continuous cutting test was performed on steel under the conditions of 30 min., And the wear resistance was evaluated by measuring the flank wear width and rake face wear depth of the cutting edge. Furthermore, the work piece: SNCM439 (hard Is: H B 260) of the groove Irizai, cutting speed: 130m / min, feed:. 0.35 mm / rev, cut: 2 mm cutting time: 3min, performs dry high feed interrupted cutting test of steel in the conditions, Cutting blade
The number of occurrences of defects out of 10 was measured to evaluate the defect resistance. The results are shown in Table 1.
第１表に示される結果から、本発明切削チップ１〜12
は、Ｘ線回折で、いずれもWCの（211）面 における波形が高低差のある２つの連続ピーク波形にし
て、そのL/l比が35以下の回折曲線を示し、さらに表面
部には平均層厚で0.5〜10μｍの表面硬質相が形成され
ているので、苛酷な条件下での切削となる上記継続切削
でも、欠けやチッピングの発生がなく、すぐれた耐欠損
性を示し、また上記連続切削ではすぐれた耐摩耗性を示
すのに対して、従来切削チップ１〜12では、WCの（21
1）面における波形が単一波形か、２つの連続ピーク波
形を示しても両ピークの高低差が著しく大きく、いずれ
もL/l比が40以上となっており、この結果耐欠損性不足
となるため断続切削ではほとんどの切刃に欠けが発生し
ており、また表面硬質層の形成もないので、連続切削で
は高い摩耗を示すことが明らかである。From the results shown in Table 1, the cutting tips 1 to 12 of the present invention are shown.
Is the X-ray diffraction, both of which are (211) faces of WC Are two continuous peak waveforms with a height difference, the L / l ratio shows a diffraction curve of 35 or less, and a surface hard phase with an average layer thickness of 0.5 to 10 μm is formed on the surface. Therefore, even in the above-mentioned continuous cutting, which is performed under severe conditions, there is no chipping or chipping, and it shows excellent fracture resistance. For cutting tips 1-12, WC (21
1) Even if the waveform on the surface shows a single waveform or two continuous peak waveforms, the height difference between the two peaks is remarkably large, and both have an L / l ratio of 40 or more. Therefore, it is apparent that intermittent cutting causes chipping on most of the cutting edges and that no hard surface layer is formed, so that continuous cutting shows high wear.
実施例２ 実施例１で用いたと同じ原料粉末を用い、Co:6％、Ti
C:6％、TaC:4％、WC:残りからなる配合組成に配合し、
実施例１におけると同一の条件で混合し、乾燥した後、
圧粉体にプレス成形し、その圧粉体を、１×10-3torrの
真空中、温度:1360℃に90分間保持の条件で焼結して、
実質的に配合組成と同じ組成、並び直径:100mm×高さ:3
5mmの寸法をもったWC基超硬合金工具素材を成形し、さ
らにこの素材に研削加工を施して、その形状を外径:98m
m×内径:33mmとすることにより耐摩耗工具部材としての
深絞り加工ダイス（このダイスは従来深絞り加工ダイス
に相当するものである）を複数本製造し、さらにこれら
従来深絞り加工ダイスのうちの半分に、0.8気圧の窒素
雰囲気中、温度:1250℃に60分間保持の条件で熱処理を
施すことにより本発明深絞り加工ダイスを製造した。Example 2 Using the same raw material powder as used in Example 1, Co: 6%, Ti
C: 6%, TaC: 4%, WC: blended into the composition consisting of the rest,
After mixing and drying under the same conditions as in Example 1,
Press molding into a green compact, and sintering the green compact in a vacuum of 1 × 10 -3 torr at a temperature of 1360 ° C. for 90 minutes,
Composition that is substantially the same as the blend composition, diameter: 100 mm × height: 3
A WC-based cemented carbide tool material with a dimension of 5 mm is formed, and this material is further subjected to grinding to change its shape to an outer diameter of 98 m.
By setting m × inner diameter: 33 mm, a plurality of deep drawing dies (this die is equivalent to conventional deep drawing dies) as wear-resistant tool members are manufactured, and among these conventional deep drawing dies, A deep drawing die of the present invention was manufactured by subjecting half of the sample to heat treatment in a nitrogen atmosphere at 0.8 atm under the condition of holding at a temperature of 1250 ° C. for 60 minutes.
この結果得られた本発明深絞り加工ダイスおよび従来
深絞り加工ダイスは、第２表に示される通りの特性を示
し、また、これを用いて厚さ:0.3mmの鋼板の深絞り加工
を行ない、深絞り製品の内径寸法がダイス摩耗により0.
5mm縮径となった時点を使用寿命とし、使用寿命に至る
までの深絞り加工回数を測定し、第２表に示した。The deep-drawing dies of the present invention and the conventional deep-drawing dies obtained as a result show the characteristics as shown in Table 2, and are used for deep-drawing a steel sheet having a thickness of 0.3 mm. The inner diameter of deep drawn products is reduced to 0.
The service life is defined as the time when the diameter is reduced by 5 mm, and the number of times of deep drawing until the service life is reached was measured.
第２表に示される結果から明らかなように、本発明深
絞り加工ダイスは従来深絞り加工ダイスに比して一段と
すぐれた耐摩耗性を示し、使用寿命の著しい延命化を可
能とするものである。 As is clear from the results shown in Table 2, the deep-drawing dies of the present invention show much higher wear resistance than the conventional deep-drawing dies, and can significantly extend the service life. is there.
上述のように、この発明のWC基超硬合金製工具部材
は、すぐれた耐摩耗性と耐欠損性を兼ね備えているの
で、これを切削工具部材や耐摩耗工具部材などとして適
用した場合、すぐれた性能を著しく長期に亘って発揮す
るのである。As described above, the WC-based cemented carbide tool member of the present invention has both excellent wear resistance and fracture resistance. The performance is extremely long-lasting.
第１図はこの発明のWC基超硬合金製工具部材のＸ線回折
で、WCの（211）面に現われた波形を例示する図であ
る。FIG. 1 is a diagram illustrating an example of a waveform appearing on the (211) plane of WC in the X-ray diffraction of a tool member made of a WC-based cemented carbide according to the present invention.
Claims (1)
よび6a族金属の炭化物、並びにこれらの炭化タングステ
ンを含む２種以上の複合炭化物固溶体のうちの１種また
は２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炭化タ
ングステンと不可避不純物からなる組成（以上重量％）
を有する炭化タングステン基超硬合金製工具部材にし
て、この工具部材は、 その表面に対するＸ線回折で、炭化タングステンの（21
1）面に、高低差のある２つの連続ピークからなり、か
つ前記２つの連続ピーク間の谷部から高い方のピーク高
さをＬ、同じく低い方のピーク高さをｌとした場合、L/
l:35以下を満足する波形が現われる回折曲線を示すと共
に、 その表面部に、0.5〜10μｍの平均層厚で相対的に分散
相濃度の高い表面硬質層を形成せしめたことを特徴とす
る耐摩耗性および耐欠損性のすぐれた炭化タングステン
基超硬合金製工具部材。1. Co: 1 to 25% as a binder phase-forming component, carbides of metals of groups 4a, 5a and 6a of the periodic table except for W as a disperse phase-forming component, and two types including these tungsten carbides One or more of the above-mentioned complex carbide solid solutions: 0.5 to 30%, and the balance also includes tungsten carbide as a dispersed phase forming component and unavoidable impurities (more than weight%)
A tungsten carbide-based cemented carbide tool member having the following characteristics: This tool member is characterized by its tungsten carbide (21
1) When the surface is composed of two continuous peaks having a height difference, and the height of the higher peak from the valley between the two continuous peaks is L, and the height of the lower peak is 1 /
l: A diffraction curve showing a waveform that satisfies 35 or less appears, and a surface hard layer having an average layer thickness of 0.5 to 10 μm and a relatively high dispersed phase concentration is formed on the surface thereof. Tungsten carbide based cemented carbide tool members with excellent wear and fracture resistance.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9218489A JP2621474B2 (en) | 1989-04-12 | 1989-04-12 | Tungsten carbide based cemented carbide tool members with excellent wear and fracture resistance |
| US07/507,665 US5066553A (en) | 1989-04-12 | 1990-04-10 | Surface-coated tool member of tungsten carbide based cemented carbide |
| EP90106963A EP0392519B1 (en) | 1989-04-12 | 1990-04-11 | Surface-coated tool member of tungsten carbide based cemented carbide |
| DE69005348T DE69005348T2 (en) | 1989-04-12 | 1990-04-11 | Surface-coated tool part made of tungsten carbide based on tungsten carbide. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9218489A JP2621474B2 (en) | 1989-04-12 | 1989-04-12 | Tungsten carbide based cemented carbide tool members with excellent wear and fracture resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02270957A JPH02270957A (en) | 1990-11-06 |
| JP2621474B2 true JP2621474B2 (en) | 1997-06-18 |
Family
ID=14047354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9218489A Expired - Lifetime JP2621474B2 (en) | 1989-04-12 | 1989-04-12 | Tungsten carbide based cemented carbide tool members with excellent wear and fracture resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2621474B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8512807B2 (en) * | 2008-12-10 | 2013-08-20 | Seco Tools Ab | Method of making cutting tool inserts with high demands on dimensional accuracy |
-
1989
- 1989-04-12 JP JP9218489A patent/JP2621474B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02270957A (en) | 1990-11-06 |
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