JP2536536B2 - Cermet cutting tip - Google Patents
Cermet cutting tipInfo
- Publication number
- JP2536536B2 JP2536536B2 JP62194603A JP19460387A JP2536536B2 JP 2536536 B2 JP2536536 B2 JP 2536536B2 JP 62194603 A JP62194603 A JP 62194603A JP 19460387 A JP19460387 A JP 19460387A JP 2536536 B2 JP2536536 B2 JP 2536536B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- resistance
- cermet
- cutting tip
- content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011195 cermet Substances 0.000 title claims description 12
- 239000000203 mixture Substances 0.000 claims description 8
- 229910003468 tantalcarbide Inorganic materials 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 2
- 229910052785 arsenic Inorganic materials 0.000 claims description 2
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 claims description 2
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 claims description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 11
- 239000000843 powder Substances 0.000 description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 238000003801 milling Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、耐塑性変形性および耐衝撃性にすぐれ、
かつ高硬度を有するサーメットで構成され、したがって
実用に際しては、すぐれた耐欠損性と耐摩耗性を示す切
削チップに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention has excellent plastic deformation resistance and impact resistance,
In addition, the present invention relates to a cutting tip which is composed of a cermet having high hardness and therefore exhibits excellent fracture resistance and wear resistance in practical use.
先に、同一出願人は、結合相形成成分として、 W:2〜15％、 Coおよび／またはNi:5〜25
％、 を含有し、硬質相形成成分として、 窒化チタン（以下TiNで示す）:10〜40％、 炭化タンタル（以下TaCで示す）:5〜30％、 炭化タングステン（以下WCで示す）:5〜25％、 を含有し、残りが同じく硬質相形成成分としての炭化チ
タン（以下TiCで示す）と不可避不純物からなる組成
（以上重量％、以下％は重量％を示す）を有するサーメ
ットで構成された切削チップ（以下先行切削チップとい
う）を、特願昭60−221547号（特開昭62−79904号）と
して出願した。Previously, the same applicant as the binder phase forming component, W: 2 ~ 15%, Co and / or Ni: 5 ~ 25
%, As a hard phase forming component, titanium nitride (hereinafter indicated by TiN): 10 to 40%, tantalum carbide (hereinafter indicated by TaC): 5 to 30%, tungsten carbide (hereinafter indicated by WC): 5 ~ 25%, and the balance is composed of cermet having the composition of titanium carbide (hereinafter referred to as TiC) as a hard phase forming component and unavoidable impurities (above wt%, below% indicates wt%). Another cutting tip (hereinafter referred to as the preceding cutting tip) was filed as Japanese Patent Application No. 60-221547 (Japanese Patent Laid-Open No. 62-79904).
しかし、上記の先行切削チップは、耐塑性変形性およ
び耐衝撃性にすぐれ、かつ高硬度を有するが、これを例
えばフライス切削のような大きな負荷と熱衝撃の加わる
切削に用いた場合には、必ずしも満足する切削性能を示
さず、切刃に欠損が発生する場合がしばしば生ずるもの
である。However, the preceding cutting tip is excellent in plastic deformation resistance and impact resistance, and has a high hardness, when using it for cutting to which a large load and thermal shock such as milling are applied, It does not always show satisfactory cutting performance, and sometimes a cutting edge is chipped.
そこで、本発明者等は、上述のような観点から、上記
先行切削チップに一段とすぐれた耐欠損性を付与すべく
研究を行なった結果、先行切削チップを構成するサーメ
ットに、硬質相形成成分として炭化ニオブ（以下NbCで
示す）を含有させると、サーメットの耐熱衝撃性および
耐酸化性が著しく向上するようになり、この結果連続切
削ではすぐれた耐摩耗性を示すことは勿論のこと、切削
条件の厳しいフライス切削のような断続切削ですぐれた
等欠損性を示すようになるという知見を得たのである。Therefore, the present inventors, from the above viewpoints, as a result of conducting research to give the preceding cutting tip more excellent fracture resistance, the cermet constituting the preceding cutting tip, as a hard phase forming component. The inclusion of niobium carbide (hereinafter referred to as NbC) significantly improves the thermal shock resistance and oxidation resistance of the cermet, which results in excellent wear resistance in continuous cutting as well as cutting conditions. We have obtained the knowledge that it shows excellent fracture characteristics in interrupted cutting such as severe milling.
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、 W:5〜10％、 Coおよび／またはNi:10〜20
％、 を含有し、硬質相形成成分として、 TiN:15〜30％、 TaC:3〜10％、 NbC:1〜10％、 WC:5〜10％、 を含有し、残りが同じく硬質相形成成分としてのTiCと
不可避不純物からなる組成を有する、耐塑性変形性と耐
衝撃性にすぐれた高硬度サーメットで構成され、実用に
際してすぐれた耐欠損性と耐摩耗性を示す切削チップに
特徴を有するものである。The present invention has been made based on the above findings, and as a binder phase forming component, W: 5-10%, Co and / or Ni: 10-20
%, TiN: 15 to 30%, TaC: 3 to 10%, NbC: 1 to 10%, WC: 5 to 10% as a hard phase forming component, and the rest contains the same hard phase. It is composed of a high-hardness cermet with excellent plastic deformation resistance and impact resistance that has a composition consisting of TiC as a component and unavoidable impurities, and is characterized by a cutting tip that exhibits excellent fracture resistance and wear resistance in practical use. It is a thing.
つぎに、この発明の切削チップにおいて、サーメット
の成分組成を上記の通りに限定した理由を説明する。Next, the reason why the component composition of the cermet in the cutting tip of the present invention is limited as described above will be described.
（ａ） Ｗ Ｗ成分には、CoおよびNiと固溶体を形成し、チップの
耐塑性変形性を向上させる作用があるが、その含有量が
５％未満では前記作用に所望のすぐれた効果が得られ
ず、一方その含有量が10％を越えると、焼結性の低下が
原因でチップの靭性に低下傾向が現われるようになるこ
とから、その含有量を５〜10％と定めた。(A) The WW component has an action of forming a solid solution with Co and Ni and improving the plastic deformation resistance of the chip, but if the content thereof is less than 5%, the desired excellent effect can be obtained in the above action. However, if the content exceeds 10%, the toughness of the chip tends to decrease due to the decrease in sinterability, so the content was set to 5-10%.
（ｂ） CoおよびNi これらの成分には、上記の通りＷ成分と共に結合相を
形成して、チップの耐衝撃性を向上させる作用がある
が、その含有量が10％未満では所望のすぐれた耐衝撃性
を確保することができず、一方その含有量が20％を越え
ると、チップの耐塑性変形性に劣化傾向が現われるよう
になることから、その含有量を10〜20％と定めた。(B) Co and Ni These components have a function of forming a binder phase together with the W component as described above to improve the impact resistance of the chip, but if the content thereof is less than 10%, the desired excellent results are obtained. The impact resistance cannot be ensured. On the other hand, if the content exceeds 20%, the plastic deformation resistance of the chip tends to deteriorate, so the content was set to 10 to 20%. .
（ｃ） TiN TiN成分には、焼結時における粒成長を抑制し、かつ
チップの耐衝撃性を向上させる作用があるが、その含有
量が15％未満では前記作用に所望のすぐれた効果が得ら
れず、一方その含有量が30％を越えると、チップ内に巣
が形成され易くなり、耐衝撃性に低下傾向が現われるよ
うになることから、その含有量を15〜30％と定めた。(C) TiN The TiN component has the effect of suppressing grain growth during sintering and improving the impact resistance of the chip, but if its content is less than 15%, the desired and excellent effect is obtained. However, if the content exceeds 30%, cavities are likely to be formed in the chip, and the impact resistance tends to decrease, so the content was defined as 15 to 30%. .
（ｄ） TaC TaC成分には、チップの耐酸化性を一段と向上させ、
もって高速での切削性能を一段と高める作用があるが、
その含有量が３％未満では前記作用に所望の効果が得ら
れず、一方10％を越えて含有させても作用が飽和し、よ
り一層の向上効果が現われないことから、経済性を考慮
して、その含有量を３〜10％と定めた。(D) TaC The TaC component further improves the oxidation resistance of the chip,
It has the effect of further improving the cutting performance at high speed,
If its content is less than 3%, the desired effect cannot be obtained, while if it exceeds 10%, the effect is saturated and no further improvement effect appears. And its content was set to 3 to 10%.
（ｅ） NbC NbC成分には、チップの耐酸化性および耐熱衝撃性を
著しく向上させ、もってチップの耐欠損性を著しく向上
させる作用があるが、その含有量が１％未満では所望の
耐欠損性向上効果が得られず、一方その含有量が10％を
越えても、より一層の向上効果が得られず、経済性を考
慮して、この含有量を１〜10％と定めた。(E) NbC The NbC component has the effect of significantly improving the oxidation resistance and thermal shock resistance of the chip and thus the chip resistance of the chip, but if the content is less than 1%, the desired chip resistance is obtained. However, even if the content exceeds 10%, no further improvement effect can be obtained, and in consideration of economic efficiency, the content is set to 1 to 10%.
（ｆ） WC WC成分には、硬質相形成成分の結合相形成成分とのぬ
れ性を高め、もってチップの耐衝撃性を向上させる作用
があるが、その含有量が５％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10％を越えると、チ
ップの耐摩耗性に低下傾向が現われるようになることか
ら、その含有量を５〜10％と定めた。(F) WC The WC component has an action of enhancing the wettability of the hard phase forming component with the binder phase forming component and thereby improving the impact resistance of the chip. The desired effect cannot be obtained, and when the content exceeds 10%, the wear resistance of the chip tends to decrease, so the content was set to 5-10%.
つぎに、この発明の切削チップを実施例により具体的
に説明する。Next, the cutting insert of the present invention will be specifically described with reference to examples.
原料粉末として、平均粒径:1.0μｍのＷ粉末、同1.2
μｍのCo粉末、同1.8μｍのNi粉末、同1.5μｍのTiN粉
末、同１μｍのTaC粉末、同１μｍのNbC粉末、同0.8μ
ｍのWC粉末、同1.2μｍのTiC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
ールミルにて72時間湿式混合し、乾燥した後、15kg/mm2
の圧力にて圧粉体にプレス成形し、ついで、この圧粉体
を、いずれも窒素雰囲気中、雰囲気圧力:10-2〜10tor
r、温度:1400〜1500℃、時間:1.5〜２時間の範囲内の所
定の条件で焼結することによって、実質的に配合組成と
同一の成分組成をもち、かつISO・SNGN432の形状をもっ
た本発明切削チップ１〜２および比較切削チップ１〜９
をそれぞれ製造した。As raw material powder, W powder with an average particle size of 1.0 μm, 1.2
μm Co powder, 1.8 μm Ni powder, 1.5 μm TiN powder, 1 μm TaC powder, 1 μm NbC powder, 0.8 μm
m WC powder and 1.2 μm TiC powder were prepared, and these raw material powders were each mixed in the composition shown in Table 1, wet-mixed for 72 hours in a ball mill and dried, then 15 kg / mm 2
Press-molded into a green compact at a pressure of 10 psi, and then press the green compact in a nitrogen atmosphere at atmospheric pressure: 10 -2 to 10 torr.
r, temperature: 1400-1500 ° C, time: 1.5-2 hours by sintering under the prescribed conditions, the composition is substantially the same as that of the composition and the shape of ISO / SNGN432. The present invention cutting tips 1-2 and comparative cutting tips 1-9
Were manufactured respectively.
なお、比較切削チップ１〜９は、いずれも構成成分の
うちの少なくともいずれか１種の成分含有量（第１表で
※印を付したもの）がこの発明の範囲から外れた組成を
もつものである。Each of the comparative cutting tips 1 to 9 has a composition in which the content of at least one of the constituent components (marked with * in Table 1) is outside the scope of the present invention. Is.
ついで、この結果得られた各種の切削チップについ
て、 被削材:SNCM439（硬さ:HB280）、 切削速度:140m/min、 送り:0.3mm/rev、 切込み:3mm、 切削時間:30分、 の条件で鋼丸棒の高速連続切削試験を行ない、耐摩耗性
を評価する目的で切刃の逃げ面摩耗幅を測定し、さら
に、チップの耐衝撃性を評価する目的で、 被削材:SCM440（硬さ:HB250）、 切削速度:250m/min、 送り:0.3mm/刃、 切込み:3mm、 切削時間:5分、 の条件で鋼角材のフライス切削試験を行ない、10個の切
刃数のうちの欠損発生数を測定し、第１表に示した。Then, about various cutting tips obtained as a result, work material: SNCM439 (hardness: H B 280), cutting speed: 140 m / min, feed: 0.3 mm / rev, depth of cut: 3 mm, cutting time: 30 minutes In order to evaluate the wear resistance, the flank wear width of the cutting edge is measured by performing a high-speed continuous cutting test of the steel round bar under the conditions of, and the work material for the purpose of evaluating the impact resistance of the insert. : SCM440 (Hardness: H B 250), Cutting speed: 250m / min, Feed: 0.3mm / blade, Depth of cut: 3mm, Cutting time: 5 minutes, The milling cutting test of the steel square bar was carried out under the conditions of No. 1, and the number of occurrence of defects out of the number of 10 cutting edges was measured and shown in Table 1.
第１表に示される結果から、本発明切削チップ１〜２
は、すぐれた耐摩耗性と耐欠損性を示すのに対して、比
較切削チップ１〜９に見られるように構成成分のうちの
少なくともいずれか１種の含有量がこの発明の範囲から
外れると耐摩耗性と耐欠損性のうちの少なくともいずれ
かの特性が劣化するようになることが明らかです。From the results shown in Table 1, the cutting tips 1-2 of the present invention
Exhibits excellent wear resistance and chipping resistance, while the content of at least one of the constituents is out of the range of the present invention as seen in Comparative Cutting Tips 1-9. It is clear that wear and / or fracture resistance will deteriorate.
上述のように、この発明のサーメット製切削チップ
は、これを構成するサーメットが耐塑性変形性および耐
衝撃性にすぐれ、かつ高硬度を有するので、高速切削は
勿論のこと、高送りおよび高切り込みなどの重切削、さ
らに大きな負荷と熱衝撃の加わるフライス切削などの厳
しい条件での断続切削に際して、すぐれた耐欠損性と耐
摩耗性を示し、長期に亘ってすぐれた切削性能を発揮す
るものである。As described above, the cermet cutting tip of the present invention has a high hardness, because the cermet constituting the cermet has excellent plastic deformation resistance and impact resistance, and has high hardness. It exhibits excellent fracture resistance and wear resistance during heavy cutting such as, and intermittent cutting under severe conditions such as milling where a large load and thermal shock are applied, and exhibits excellent cutting performance over a long period of time. is there.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中原 啓 埼玉県大宮市北袋町１―297 三菱金属 株式会社中央研究所内 (56)参考文献 特開 昭62−79904（ＪＰ，Ａ) 特開 昭61−73857（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kei Nakahara 1-297 Kitabukuro-cho, Omiya-shi, Saitama Inside Central Research Laboratory, Mitsubishi Metals Co., Ltd. (56) Reference JP 62-79904 (JP, A) JP 61 -73857 (JP, A)
Claims (1)
％、 を含有し、硬質相形成成分として、 窒化チタン:15〜30％、 炭化タンタル:3〜10％、 炭化ニオブ:1〜10、 炭化タングステン:5〜10％、 を含有し、残りが同じく硬質相形成成分としての炭化チ
タンと不可避不純物からなる組成（以上重量％）を有す
るサーメットで構成されたことを特徴とする耐塑性変形
性および耐衝撃性のすぐれたサーメット製切削チップ。1. As a binder phase forming component, W: 5 to 10%, Co and / or Ni: 10 to 20
%, As a hard phase forming component, titanium nitride: 15 to 30%, tantalum carbide: 3 to 10%, niobium carbide: 1 to 10, tungsten carbide: 5 to 10%, and the rest are the same. A cermet cutting tip having excellent plastic deformation resistance and impact resistance, which is characterized by comprising a cermet having a composition (above wt%) composed of titanium carbide as a hard phase forming component and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62194603A JP2536536B2 (en) | 1987-08-04 | 1987-08-04 | Cermet cutting tip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62194603A JP2536536B2 (en) | 1987-08-04 | 1987-08-04 | Cermet cutting tip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6439342A JPS6439342A (en) | 1989-02-09 |
| JP2536536B2 true JP2536536B2 (en) | 1996-09-18 |
Family
ID=16327294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62194603A Expired - Fee Related JP2536536B2 (en) | 1987-08-04 | 1987-08-04 | Cermet cutting tip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2536536B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7819401B2 (en) * | 2006-11-09 | 2010-10-26 | Xerox Corporation | Print media rotary transport apparatus and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6173857A (en) * | 1984-09-19 | 1986-04-16 | Mitsubishi Metal Corp | Cermet for cutting tools |
| JPH0616962B2 (en) * | 1985-10-04 | 1994-03-09 | 三菱マテリアル株式会社 | Cutting tip made of titanium carbide based cermet |
-
1987
- 1987-08-04 JP JP62194603A patent/JP2536536B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6439342A (en) | 1989-02-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |