JPH02270957A - Tool member made of tungsten carbide-base sintered hard alloy excellent in wear resistance and breaking resistance - Google Patents
Tool member made of tungsten carbide-base sintered hard alloy excellent in wear resistance and breaking resistanceInfo
- Publication number
- JPH02270957A JPH02270957A JP9218489A JP9218489A JPH02270957A JP H02270957 A JPH02270957 A JP H02270957A JP 9218489 A JP9218489 A JP 9218489A JP 9218489 A JP9218489 A JP 9218489A JP H02270957 A JPH02270957 A JP H02270957A
- Authority
- JP
- Japan
- Prior art keywords
- tungsten carbide
- tool member
- resistance
- carbide
- wear resistance
- 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.)
- Granted
Links
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract 3
- 239000010937 tungsten Substances 0.000 title claims abstract 3
- 239000000956 alloy Substances 0.000 title abstract 3
- 229910045601 alloy Inorganic materials 0.000 title abstract 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title abstract 2
- 239000010410 layer Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 6
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 239000006104 solid solution Substances 0.000 claims abstract description 4
- 150000002739 metals Chemical class 0.000 claims abstract description 3
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims 1
- -1 tungsten carbides Chemical class 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 36
- 239000000203 mixture Substances 0.000 abstract description 9
- 238000002441 X-ray diffraction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
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
互って発揮する炭化タングステン（以下ＷＣで示す）超
超硬合金製工具部材に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention has excellent wear resistance and chipping resistance, and is particularly useful for cutting tool members such as indexable inserts, end mills, small diameter drills and drills, drawing processing, Excellent performance when applied as wear-resistant tool parts such as dies for press working and drawing, rolls for hot and cold rolling, 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) cemented carbide that exhibits the following effects over a long period of time.
一般に、上記の各種工具部材が、粉末冶金法にて、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ＷＣＣ超超硬合金素材成形し、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 various tool members are manufactured by powder metallurgy in terms of weight% (hereinafter, % indicates weight%), CO: 1 to 25% as a binder phase forming component, and element periodicity excluding W as a dispersed phase forming component. Carbides of group 4a, 5a, and 6a metals of the Table of Contents, as well as two or more composite carbide solid solutions containing these WCs (
(hereinafter collectively referred to as "metal carbides"), the composition contains 0.5 to 30% of one or more of the following (hereinafter collectively referred to as "metal carbides"), and the remainder consists of WC as a dispersed phase forming component and unavoidable impurities. It is well known that it is manufactured by molding a WCC cemented carbide material, and then grinding this material to finish it into a predetermined final shape (dimensions).
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、窩送りお
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ＷＣＣ超超硬
合金製工具部材は、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 tool members mentioned above, if we take the indexable insert, which is used as a cutting tool member for continuous cutting and interrupted cutting, as an example, due to the strong demand for labor saving and high efficiency in recent years, It tends to be used for high-speed cutting, heavy cutting such as hole feed and high depth of cut, and the same goes for various wear-resistant tool parts, and the usage conditions tend to become even more severe. At present, tool members made of cemented carbide cannot sufficiently meet these requirements due to 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ＷＣＣ超超硬合金製工具部材着目し、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ＷＣＣ超超硬合金製工具部材おいては、
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
さをり、同じく低い方のピーク高さをｇ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
圧カニ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／Ω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、切削時に発生した裏面部内部歪の除
去、および工具部材を構成する分散相形成成分の部材表
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ＷＣＣ超超硬合金製工具部材耐欠損
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じて適用した場合、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。Therefore, from the above-mentioned viewpoint, the present inventors focused on the conventional WCC cemented carbide tool member and conducted research to improve the wear resistance and chipping resistance of the tool member. In conventional WCC cemented carbide tool parts,
X-ray diffraction on the surface shows that the (211) plane of WC has
If a single peak waveform or two consecutive peak waveforms with a height difference appear, and in the case of the two consecutive peak waveforms, the height of the higher peak is calculated from the valley between the two consecutive peaks, and the height of the lower peak is calculated from the valley between the two consecutive peaks. If the peak height is g, then L/
It shows a diffraction curve in which l is 40 or more, and is maintained at a predetermined temperature within the range of 1000 to 1500°C for a predetermined time in a non-oxidizing atmosphere such as a nitrogen atmosphere or a carburizing atmosphere at a pressure of 1 atm or less. When the heat treatment is applied, the waveform appearing on the (211) plane of WC in the X-ray diffraction of the surface is the two continuous peak waveforms mentioned above, as illustrated in Figure 1, but the ratio of L/Ω is It now shows a diffraction curve with a smaller height difference of 35 or less, and this change in waveform due to heat treatment is caused by crimping or press-fitting into the surface during surface grinding, which becomes a starting point for chipping and chipping. The cutting waste becomes a solid solution in the binder phase at the above-mentioned heating temperature, precipitates and crystallizes during cooling, so that the cutting waste is integrated on the surface of the tool member, and the internal strain on the back surface generated during cutting is removed. It is presumed that the cause is the formation of a hard surface layer with a high concentration of dispersed phase due to the diffusion and movement of the dispersed phase-forming components constituting the tool member to the surface of the member. Cemented carbide tool members have excellent fracture resistance and also have excellent wear resistance due to the formation of a hard surface layer, and when applied to the various cutting tool members and wear-resistant tool members mentioned above, They discovered that even under harsh conditions of use, it will exhibit excellent performance over a long period of time without chipping, chipping, or cracking.
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ＷＣＣ超超硬合金製工具部
材して、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Ｌ１同じく低い方のピーク高さをｇ
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、０．５〜１０ρ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ＷＣＣ超超硬合金製工具部材特
徴を有するものである。The present invention was made based on the above findings, and includes Co: 1 to 25% as a binder phase forming component; one or more metal carbides as a dispersed phase forming component; 0.
5 to 30%, and the remainder consists of WC as a dispersed phase forming component and unavoidable impurities. The (211) plane of WC consists of two consecutive peaks with a difference in height, and the height of the higher peak from the valley between the two consecutive peaks is L1, and the height of the lower peak is g
In the case of The WCC cemented carbide tool member is characterized by excellent wear resistance and chipping resistance.
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 why the numerical values are limited as described above in the tool member of the present invention will be explained.
（ａ） Ｃｏ含有量
Ｃｏ成分には、工具部材の靭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Ｈｍ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〜ｌＯ％の含有が
望ましい。(a) Co content Co component has the effect of improving the toughness and strength of tool members, but if its content is less than 1%, the desired effect cannot be obtained. If the content exceeds 1%, the wear resistance will decrease, so the content is set at 1 to 25%, and especially for cutting tool parts that require strong wear resistance, the content should be 5 to 10%. % content 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％を越えると靭性低下が著しいことから、その
含有量を０．５〜３０％と定め／こ。(b) Content of metal carbide Metal carbide has the effect of further improving wear resistance when coexisting 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 decreases significantly, so the content is set at 0.5 to 30%.
（ｃ） ピーク波形のＬ／Ω
上記の通り、従来ＷＣＣ超超硬合金製工具部材おけるよ
うに、ＬｌＩＩ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／
ρ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１
０００〜１５００℃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/Ω of peak waveform As mentioned above, as with conventional WCC cemented carbide tool members, when the LlII ratio is 40 or more, sufficient wear resistance and chipping resistance are not exhibited, and heat treatment under the above conditions Add L/
Only by setting the ρ ratio to 35 or less will the tool member have sufficient wear resistance and chipping resistance. Also,
This peak waveform of L/l: 35 or less is made possible by setting the heating temperature during heat treatment to 1000°C or higher.On the other hand, if the heating temperature exceeds 1500°C, the crystal grains become coarse and the strength decreases. Therefore, the heating temperature is 1
It is desirable to set the temperature to 000 to 1500°C, and in that case, for example, a holding time of 30 to 90 minutes is sufficient for an indexable tip as a cutting tool member.
（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
厚をもった表面硬質層を形成することができるが、その
厚さが平均Ｉ４厚で０．５−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＜
ＬＯｕｒａ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〜
１０ρと定めた。(d) Average layer thickness of the surface hard layer The formation of the surface hard phase is influenced by the heating atmosphere, heating temperature, and holding time during heat treatment. Therefore, by appropriately controlling these heat treatment conditions, a predetermined layer thickness can be achieved. However, if the thickness is less than 0.5 in terms of average I4 thickness, the desired excellent wear resistance cannot be secured;
Even if it exceeds LOura, no further improvement effect on wear resistance is observed, and considering economic efficiency, the average layer thickness is set to 0.5~
It was set as 10ρ.
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 explained using examples.
実施例 １
原料粉末として、いずれも０，５〜１０−の範・凹円の
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７
２時時間式混合し、乾燥した後、１．５ｔｏｎ／ｃシの
圧力で圧粉体にプレス成形し、この圧粉体を、Ｉ Ｘ
ｌＯ’ｔｏｒｒの真空中、１３５０〜１５００℃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ＷＣＣ超超硬合金工
具素材成形し、この素材の上下面および外周面に研削加
工を施して、ＣＩＳ （超硬工具協会）規格５ＰＰ４２
２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 WC powder, various metal carbide powders, and Co powder, all of which have predetermined average particle diameters in the range of 0.5 to 10 - and a concave circle, were prepared as raw material powders, and each of these raw material powders was Mix it with the composition shown in Table 1 and mill it in a ball mill.
After mixing for 2 hours and drying, it was press-molded into a green compact at a pressure of 1.5 ton/c, and this green compact was
A WCC cemented carbide tool material having substantially the same composition as the compounding composition is formed by sintering in a vacuum of 10'torr and holding at a predetermined temperature within the range of 1350 to 1500°C for 90 minutes. , the upper and lower surfaces and outer peripheral surface of this material are ground to meet CIS (Cemented Carbide Tools Association) standard 5PP42.
Throwaway tip as a cutting tool member having the shape of 2 (this tip corresponds to a conventional indexable tip, so hereinafter referred to as conventional cutting tip) 1 to 12
Then, by using half of each of these conventional cutting tips 1 to 12 and subjecting them to heat treatment under the conditions shown in Table 1, cutting tips 1 to 12 of the present invention were manufactured, 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 ｓ フィルタ：Ｎ１．。Next, regarding the various cutting chips obtained as a result,
In addition to measuring the Rockwell hardness (A scale), the presence or absence of a surface hard layer is observed, and if a surface hard layer is formed, the average layer thickness is measured. :N1. .
管電圧： ４０ｋＶ、 管電流 ：４ｈＡ、、時定
数：５、
レコーダー速度： ４０ｍｍ／ ２θ（度）、Ｌ／（ｌ
比を算出した。Tube voltage: 40kV, tube current: 4hA, time constant: 5, recorder speed: 40mm/2θ (degrees), L/(l
The ratio was calculated.
さらに、上記の各種の切削チップについて、被削材：
Ｓ Ｎ ＣＭｔ３９（硬さ： ＨＢ２５０）の丸棒、切
削速度： １４０ ｍ／ｍ１ｎ 。Furthermore, for the various cutting tips mentioned above, the workpiece material:
Round bar of SN CMt39 (hardness: HB250), cutting speed: 140 m/m1n.
送 り二０．２報／ｒｅｖ、、 切込み： １．５９％ 切削時間： ８０ｍｔｎ 。Sending ri20.2 report/rev,, Depth of cut: 1.59% Cutting time: 80mtn.
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、
被削材： Ｓ Ｎ ＣＭ２Ｂ５（硬さ： ＨＢ２ＢＯ）
の溝入材、切削速度： １３０ ｍ／ｒＡｉｎ 。A continuous dry high-cut cutting test was carried out on steel under the following conditions, and the flank wear width and rake face wear depth of the cutting edge were measured to evaluate the wear resistance. Sa: HB2BO)
Grooving material, cutting speed: 130 m/rAin.
送 リ： ＯＪ５ｍ＋ｓ／ ｒｅｖ、、切込み：２
ｍｍ、
切削時間： ３ｍ１ｎ ％
の条件での鋼の乾式同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。Feed: OJ5m+s/rev, depth of cut: 2
A dry simultaneous feed intermittent cutting test was conducted on steel under the conditions of mm, cutting time: 3m1n%, and the number of fractures among 10 cutting edges was measured to evaluate fracture resistance. These 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０．５〜１０μｓ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断続切
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
（２１１）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ＬｌＩ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, cutting chips 1 to 12 of the present invention
In the X-ray diffraction, the waveforms on the (211) plane of WC are two continuous peak waveforms with different heights, and the diffraction curves have an L/(l ratio of 35 or less). Since a hard surface phase with an average layer thickness of 0.5 to 10 μs is formed, no chipping or chipping occurs even in the above-mentioned interrupted cutting, which is cutting under severe conditions, and it exhibits excellent fracture resistance. In addition, while the continuous cutting described above shows excellent wear resistance, in the conventional cutting tips 1 to 12, the waveform on the (211) plane of the WC is either a single waveform or even if it shows two continuous peak waveforms, both peaks The height difference between
In all cases, the LlI ratio is 40 or more, resulting in insufficient chipping resistance, and most of the cutting edges are chipped during interrupted cutting, and there is no formation of a hard surface layer.
It is clear 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％、
Ｔｉｃ：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、
Ｉ Ｘ １Ｏ−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：１００ｍ＋ｗＸ高さ：３５ｏｍ
の寸法をもったＷＣＣ超超硬合金工具素材成形し、さら
にこの素材に研削加工を施して、その形状をΔ径：９８
ｍ＋＊Ｘ内径’： ３’３ｍ＋ｍ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%,
Tic: 6%, TaC: 4%, WC; blended with the remaining composition, mixed under the same conditions as in Example 1, dried, press-molded into a green compact, and the green compact was ,
IX 1O-3 torr vacuum, temperature: 1360
Sintered under the conditions of holding at ℃ for 90 minutes, with substantially the same composition as the blended composition, line diameter: 100 m + w x height: 35 om
A WCC cemented carbide tool material with dimensions of
By setting m + * A deep drawing die of the present invention was manufactured by heat-treating half of the die at a temperature of 1250° C. for 60 minutes in a nitrogen atmosphere of 0.8 atm.
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０．５關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 resulting deep drawing dies of the present invention and the conventional deep drawing dies exhibit the characteristics shown in Table 2, and can be used to deep draw a steel plate with a thickness of 0.3 mm. The service life was defined as the point in time when the inner diameter of the deep-drawn product decreased by 0.5 degrees due to die wear, and the number of deep drawing processes until the service life was reached was measured, and the results are shown in Table 2.
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ｂＡＡ−て
−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 die of the present invention exhibits much better wear resistance than conventional deep drawing dies, and can significantly extend its service life. That is.
上述のように、この発明のＷＣＣ超超硬合金製工具部材
、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祠などとして適用し
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 mentioned above, since the WCC cemented carbide tool member of the present invention has both excellent wear resistance and chipping resistance,
When this material is applied as a cutting tool member or a wear-resistant tool part chassis, it exhibits excellent performance over an extremely long period of time.
第１図はこの発明のＷＣＣ超超硬合金製工具部材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 an X-ray diffraction diagram of a WCC cemented carbide tool member of the present invention, illustrating a waveform appearing on the (211) plane of WC.
Claims (1)
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（２
１１）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 from groups 4a, 5a, and 6a of the periodic table of the elements excluding W as a dispersed phase-forming component, and two or more of these tungsten carbides. One or more of the composite carbide solid solutions: 0.5 to 30%, with the remainder consisting of tungsten carbide as a dispersed phase forming component and unavoidable impurities (wt%)
This tool member is made of tungsten carbide-based cemented carbide and has tungsten carbide (2
11) The surface consists of two consecutive peaks with a difference in height,
And if the height of the higher peak from the valley between the two consecutive peaks is L, and the height of the lower peak is l,
It shows a diffraction curve in which a waveform satisfying L/l: 35 or less appears, and a hard surface layer with a relatively high dispersed phase concentration is formed on the surface with an average layer thickness of 0.5 to 10 μm. A tungsten carbide-based cemented carbide tool member with excellent wear resistance and chipping 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 true JPH02270957A (en) | 1990-11-06 |
| JP2621474B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012511437A (en) * | 2008-12-10 | 2012-05-24 | セコ ツールズ アクティエボラーグ | Cutting tool insert manufacturing method that requires high dimensional accuracy |
-
1989
- 1989-04-12 JP JP9218489A patent/JP2621474B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012511437A (en) * | 2008-12-10 | 2012-05-24 | セコ ツールズ アクティエボラーグ | Cutting tool insert manufacturing method that requires high dimensional accuracy |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2621474B2 (en) | 1997-06-18 |
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