JP2626866B2 - Cemented carbide and its manufacturing method - Google Patents
Cemented carbide and its manufacturing methodInfo
- Publication number
- JP2626866B2 JP2626866B2 JP5006360A JP636093A JP2626866B2 JP 2626866 B2 JP2626866 B2 JP 2626866B2 JP 5006360 A JP5006360 A JP 5006360A JP 636093 A JP636093 A JP 636093A JP 2626866 B2 JP2626866 B2 JP 2626866B2
- Authority
- JP
- Japan
- Prior art keywords
- carbide
- tungsten
- powder
- cemented
- molybdenum
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000000843 powder Substances 0.000 claims description 24
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 18
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 claims description 15
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 claims description 14
- 229910039444 MoC Inorganic materials 0.000 claims description 14
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims description 14
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 claims description 14
- 229910003468 tantalcarbide Inorganic materials 0.000 claims description 14
- 229910003470 tongbaite Inorganic materials 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 10
- 229910017052 cobalt Inorganic materials 0.000 claims description 9
- 239000010941 cobalt Substances 0.000 claims description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 4
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims description 4
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 4
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001936 tantalum oxide Inorganic materials 0.000 claims description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 4
- 229910001935 vanadium oxide Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 230000000536 complexating effect Effects 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910009043 WC-Co Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、微粒ＷＣ−Ｃｏ超硬合
金より高強度高硬度で、エンドミル、ドリル、スリッタ
ーナイフなどに利用される超硬合金に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cemented carbide having higher strength and hardness than fine-grained WC-Co cemented carbide and used for end mills, drills, slitter knives and the like.
【０００２】[0002]
【従来の技術】近年、金型の高精度化と耐久性の向上に
伴い、材料が高硬度となり、難削化を来たしている。そ
のため、従来から用いられていた高速度工具鋼だけでは
十分に対応することができない場合が、生じている。ま
た、プリント基板用ドリルも、プリント基板の積層化の
進展に相応して高強度高硬度の材料が要求されている。
一方、スリッターナイフにおいても、磁気テープの高密
度化と高硬度化に伴い、切断寸法、切り口精度などに対
する要求が、一段と厳格となっている。これらの要求に
対処する技術として現在提案されている特開昭６１−１
２８４７号公報、特開昭６２−４８４１３号公報及び特
開昭６３−９６２４４号公報各記載の発明は、添加物を
入れ、微粒化させてはいるものの、強度及び硬度の点で
十分には満足できない場合がある。2. Description of the Related Art In recent years, with the increase in precision and durability of molds, materials have become harder and harder to machine. For this reason, there have been cases where the conventional high-speed tool steel alone cannot sufficiently cope with the problem. In addition, drills for printed circuit boards are also required to be made of a material having high strength and high hardness in accordance with the progress of lamination of printed circuit boards.
On the other hand, with respect to the slitter knife, the demand for cutting dimensions, cut edge accuracy, and the like has become more severe as the density and hardness of the magnetic tape have increased. Japanese Patent Application Laid-Open No. 611-1 is currently proposed as a technique for meeting these requirements.
The inventions described in JP-A-2847, JP-A-62-48413 and JP-A-63-96244 each contain additives and are atomized, but are sufficiently satisfactory in strength and hardness. It may not be possible.
【０００３】[0003]
【発明が解決しようとする課題】エンドミル、ドリル、
スリッターナイフなどを用途とする超硬合金は、高強
度、高靭性、高剛性、高硬度であることを要求される。
このような要求を相当程度満足する発明として、特開昭
６１−１２８４７号公報記載の発明は、ＷＣ−Ｃｏ合金
にバナジウム及びクロームを添加することにより複合効
果で炭化タングステンの粒成長抑制効果を意図し、ロッ
クウェル硬さＡスケール９１以上、抗折力（靭性）が３
５０ｋｇ／ｍｍ2 以上有する耐摩耗性及び高靭性を有す
る超硬合金である。また、特開昭６２−４８４１３号公
報記載の発明は、刃先部の高硬度材質が超硬合金であ
り、表面被覆層がコバルト、クロム、タングステン、モ
リブデン等からなる群から選ばれた１種以上の金属又は
合金であるプリント基板用穴明けドリルである。更に、
特開昭６３−９６２４４号公報記載の発明は、コバルト
又はニッケルの少なくとも一方の量に対する炭化クロム
の量を調整することにより、炭化タングステンの粒成長
を抑制させて、高強度と樹脂に対する耐腐蝕性の向上を
図ったプリント基板の穴あけ工具部品用超硬合金であ
る。しかし、いずれの超硬合金も、微粒にするがゆえ、
他炭化物を多量に添加しており、切刃にチッピングを生
じ易かったり、靭性に乏しいという欠点があった。SUMMARY OF THE INVENTION End mills, drills,
A cemented carbide used for a slitter knife or the like is required to have high strength, high toughness, high rigidity, and high hardness.
As an invention satisfying such demands to a considerable extent, the invention described in Japanese Patent Application Laid-Open No. 61-12847 aims at suppressing the grain growth of tungsten carbide by adding a vanadium and chromium to a WC-Co alloy. And Rockwell hardness A scale 91 or more, bending strength (toughness) 3
This is a cemented carbide having a wear resistance and high toughness of 50 kg / mm 2 or more. Further, the invention described in Japanese Patent Application Laid-Open No. 62-48413 discloses that the high hardness material of the cutting edge portion is a cemented carbide, and the surface coating layer is at least one selected from the group consisting of cobalt, chromium, tungsten, molybdenum and the like. This is a drill for a printed board, which is a metal or an alloy. Furthermore,
The invention described in Japanese Patent Application Laid-Open No. 63-96244 adjusts the amount of chromium carbide with respect to at least one of cobalt and nickel to suppress the grain growth of tungsten carbide, thereby achieving high strength and corrosion resistance to resin. This is a cemented carbide alloy for drilling tool parts on printed circuit boards that has improved the quality. However, since all cemented carbides are fine-grained,
Since a large amount of other carbides is added, chipping is liable to occur on the cutting edge and the toughness is poor.
【０００４】そこで、本発明は、前記従来の技術の欠点
を改良して、高硬度、高強度、かつ、耐溶着性がすぐれ
た超微粒超硬合金及びその製造方法を提供しようとする
ものである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the disadvantages of the prior art and to provide an ultrafine-grained cemented carbide having high hardness, high strength and excellent welding resistance, and a method for producing the same. is there.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記課題を解
決するため、次の超硬合金及びその製造方法を構成す
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises the following cemented carbide and a method for producing the same.
【０００６】１．コバルト５〜２０、炭化クロム０．５
〜１．５、炭化バナジウム０．１〜０．５、炭化タンタ
ル０．５〜４．０、炭化モリブデン０．５〜３．０で、
残部が炭化タングステン及び不可避不純物からなる組成
を有する超硬合金。[0006] 1. Cobalt 5-20, chromium carbide 0.5
~ 1.5, vanadium carbide 0.1-0.5, tantalum carbide 0.5-4.0, molybdenum carbide 0.5-3.0,
A cemented carbide having a balance of tungsten carbide and unavoidable impurities.
【０００７】２．超硬合金中の炭化タングステンの平均
粒径が０．５μｍ以下である前記１記載の超硬合金。[0007] 2. 2. The cemented carbide according to 1 above, wherein the average particle size of tungsten carbide in the cemented carbide is 0.5 μm or less.
【０００８】３．炭化クロム、炭化バナジウム、炭化タ
ンタル及び炭化モリブデン粉末を、あらかじめ炭化タン
グステンと複合化した粉末を用い、コバルト５〜２０、
炭化クロム０．５〜１．５、炭化バナジウム０．１〜
０．５、炭化タンタル０．５〜４．０、炭化モリブデン
０．５〜３．０で、残部が炭化タングステン及び不可避
不純物からなる組成を有する超硬合金の製造方法。[0008] 3. Chromium carbide, vanadium carbide, tantalum carbide and molybdenum carbide powder, using a powder previously compounded with tungsten carbide, cobalt 5-20,
Chromium carbide 0.5-1.5, vanadium carbide 0.1-
A method for producing a cemented carbide having a composition of 0.5, tantalum carbide 0.5 to 4.0, molybdenum carbide 0.5 to 3.0, with the balance being tungsten carbide and unavoidable impurities.
【０００９】４．前記３記載の複合化した粉末が、酸化
タングステン、酸化クロム、酸化バナジウム、酸化タン
タル、モリブデン及びカーボンの混合粉末を、不活性ガ
ス雰囲気中で加熱処理を施し、再度水素ガス雰囲気中で
加熱処理を施すことによって得た複合炭化物粉末である
超硬合金の製造方法。4. The composite powder according to the above 3 is subjected to a heat treatment of a mixed powder of tungsten oxide, chromium oxide, vanadium oxide, tantalum oxide, molybdenum and carbon in an inert gas atmosphere, and then heat-treated again in a hydrogen gas atmosphere. A method for producing a cemented carbide, which is a composite carbide powder obtained by the application.
【００１０】５．超硬合金中の炭化タングステンの平均
粒径が０．５μｍ以下である前記３又は４記載の超硬合
金の製造方法。[0010] 5. 5. The method for producing a cemented carbide according to the above item 3 or 4, wherein the average particle size of tungsten carbide in the cemented carbide is 0.5 μm or less.
【００１１】ここで、本発明の超硬合金において、前記
のように成分を限定した理由について述べる。Here, the reason why the components are limited as described above in the cemented carbide of the present invention will be described.
【００１２】（１）コバルト コバルト含有量が５％未満では、ち密化が十分行われ
ず、靭性が不足する。一方、２０％を超過すると、硬さ
が低下し過ぎて、耐摩耗性が低下するから、その含有量
を５〜２０％と限定した。(1) Cobalt When the cobalt content is less than 5%, densification is not sufficiently performed, and toughness is insufficient. On the other hand, if it exceeds 20%, the hardness is too low, and the abrasion resistance is low. Therefore, the content is limited to 5 to 20%.
【００１３】（２）炭化クロム 炭化クロム含有量が０．５％未満では、炭化バナジウ
ム、炭化タンタル、炭化モリブデンとの複合効果が得ら
れず、所望の粒度にはならない。一方、１．５％を超過
すると、クロムが第３相として析出し靭性低下をもたら
すから、その含有量を０．５〜１．５％と限定した。(2) Chromium carbide If the chromium carbide content is less than 0.5%, the desired effect cannot be obtained due to the lack of the combined effect with vanadium carbide, tantalum carbide and molybdenum carbide. On the other hand, if the content exceeds 1.5%, chromium precipitates as a third phase and causes a decrease in toughness. Therefore, the content is limited to 0.5 to 1.5%.
【００１４】（３）炭化バナジウム 炭化バナジウムは、炭化クロム、炭化タンタル及び炭化
モリブデンと同様に、炭化タングステンの粒成長抑制効
果を有するが、その含有量が０．１％未満では、所望の
粒成長抑制効果が得られない。一方、０．５％を超過す
ると、焼結条件によって合金中に第３相が生じ、靭性低
下をもたらすから、その含有量を０．１〜０．５％と限
定した。(3) Vanadium carbide Like vanadium carbide, chromium carbide, tantalum carbide and molybdenum carbide, vanadium carbide has the effect of suppressing the grain growth of tungsten carbide. No suppression effect is obtained. On the other hand, if the content exceeds 0.5%, a third phase is formed in the alloy depending on the sintering conditions, resulting in a decrease in toughness. Therefore, the content is limited to 0.1 to 0.5%.
【００１５】（４）炭化タンタル 炭化タンタルは、炭化クロム、炭化バナジウム及び炭化
モリブデンと同様に、炭化タングステンの粒成長抑制効
果を有し、また、その耐溶着性を著しく改善する働きを
営むが、その含有量が０．５％未満では、所望の粒成長
抑制効果が得られない。一方、４．０％を超過すると、
焼結条件によって合金中に第３相が生じる場合があるか
ら、その含有量を０．５〜４．０％と限定した。(4) Tantalum Carbide Tantalum carbide, like chromium carbide, vanadium carbide and molybdenum carbide, has an effect of suppressing the grain growth of tungsten carbide and has a function of remarkably improving the welding resistance. If the content is less than 0.5%, the desired effect of suppressing grain growth cannot be obtained. On the other hand, if it exceeds 4.0%,
Since the third phase may be generated in the alloy depending on the sintering conditions, the content is limited to 0.5 to 4.0%.
【００１６】（５）炭化モリブデン 炭化モリブデンは、炭化クロム、炭化バナジウム及び炭
化タンタルと同様に、炭化タングステンの粒成長抑制効
果を有し、また、その高温での硬度を改善する働きを営
むが、その含有量が０．５％未満では、所望の粒成長抑
制効果が得られない。一方、３．０％を超過すると、焼
結条件によって合金中に第３相が生じ、靭性低下をもた
らすから、その含有量を０．５〜３．０％と限定した。(5) Molybdenum carbide Like molybdenum carbide, vanadium carbide and tantalum carbide, molybdenum carbide has the effect of suppressing the grain growth of tungsten carbide and has the function of improving its hardness at high temperatures. If the content is less than 0.5%, the desired effect of suppressing grain growth cannot be obtained. On the other hand, if the content exceeds 3.0%, a third phase is formed in the alloy depending on the sintering conditions, and the toughness is reduced. Therefore, the content is limited to 0.5 to 3.0%.
【００１７】また、本発明の超硬合金の製造方法におい
て、前記のように、炭化クロム、炭化バナジウム、炭化
タンタル及び炭化モリブデンを、あらかじめ炭化タグス
テンと複合化した粉末を用いる理由を述べると、複合化
した粉末の使用により、高硬度で、硬強度で、かつ、耐
溶着性がすぐれた超微粒超硬合金を製造できることを見
い出したためである。Further, in the method for manufacturing a cemented carbide according to the present invention, as described above, the reason for using powder obtained by previously compounding chromium carbide, vanadium carbide, tantalum carbide and molybdenum carbide with tagustene carbide is as follows. This is because it has been found that a super-fine-grained cemented carbide having high hardness, hard strength, and excellent welding resistance can be manufactured by using the converted powder.
【００１８】複合化した炭化物粉末を得るには、微粒タ
ングステン粉末から作るのが一般的である。しかし、酸
化タングステン粉末を水素雰囲気中で還元する場合、Ｗ
Ｏ2（ＯＨ）2 を介した化学輸送（ｃｈｅｍｉｃａｌ
ｖａｐｏｒ ｔｒａｎｓｐｏｒｔ）反応を伴い、タング
ステン粉末の粒成長が起きる。それで、おのずとタング
ステン粉末の粒度に限界が生じる。たとえ微粒のタング
ステン粉末が得られたとしても、再度、高温で前記酸化
物粉末と微粒タングステン粉末及びカーボン粉末と複合
化処理を行うため、炭化タングステン粉末の粒成長が起
き易くなる。In order to obtain a composite carbide powder, it is generally made from fine tungsten powder. However, when the tungsten oxide powder is reduced in a hydrogen atmosphere, W
Chemical transport via O 2 (OH) 2 (chemical
A vapor transport reaction is accompanied by grain growth of the tungsten powder. This naturally limits the particle size of the tungsten powder. Even if fine tungsten powder is obtained, the oxide powder, the fine tungsten powder and the carbon powder are again subjected to the compounding treatment at a high temperature, so that the tungsten carbide powder is likely to grow.
【００１９】本発明は、酸化クロム、酸化バナジウム、
酸化タンタル、モリブデン及び酸化タングステン粉末を
出発原料とし、最初不活性ガス雰囲気中で加熱処理を施
し、再度水素ガス雰囲気中で加熱処理を施すと、ＷＯ2
（ＯＨ）2 を介する化学輸送反応が生ぜず、微粒で均粒
な他炭化物を複合した、炭化タングステン粉末が得られ
ることを見い出し、完成したものである。The present invention relates to a chromium oxide, a vanadium oxide,
Tantalum oxide, and molybdenum and tungsten oxide powder starting material, subjected to heat treatment in the first inert gas atmosphere, when subjected to heat treatment in a hydrogen gas atmosphere again, WO 2
The present inventors have found that a tungsten carbide powder in which a chemical transport reaction via (OH) 2 does not occur and fine and uniform other carbides are compounded can be obtained.
【００２０】[0020]
【実施例】原料粉末として平均粒径０．５μｍのＷＯ3
粉末、平均粒径０．２μｍの酸化クロム粉末、平均粒径
０．３μｍの酸化バナジウム粉末、平均粒径０．１μｍ
の酸化タンタル粉末、平均粒径１．０μｍのモリブデン
粉末、及び、カーボンブラックを下記の表１に示す配合
組成で混合し、まず、１２５０℃で３０分間、不活性ガ
ス雰囲気中において加熱処理を施し、次に、１５００℃
で３０分間、還元雰囲気中において加熱処理を施して炭
化し、複合炭化物粉末とした。EXAMPLE WO 3 having an average particle size of 0.5 μm was used as a raw material powder.
Powder, chromium oxide powder with an average particle size of 0.2 μm, vanadium oxide powder with an average particle size of 0.3 μm, average particle size of 0.1 μm
Of tantalum oxide powder, molybdenum powder having an average particle size of 1.0 μm, and carbon black were mixed in the composition shown in Table 1 below, and first heat-treated at 1250 ° C. for 30 minutes in an inert gas atmosphere. And then 1500 ° C
For 30 minutes in a reducing atmosphere to perform carbonization to obtain a composite carbide powder.
【００２１】[0021]
【表１】 [Table 1]
【００２２】複合炭化物粉末の特性を下記の表２に示
す。The characteristics of the composite carbide powder are shown in Table 2 below.
【００２３】[0023]
【表２】 [Table 2]
【００２４】次に、下記の表３に示す組成になるように
コバルトを配合した後、アルコール中で湿式にて、１２
時間混合した。比較超硬合金には、炭化クロム、炭化バ
ナジウム、炭化タンタル、炭化モリブデンを用いた。Next, after blending cobalt so as to have the composition shown in Table 3 below, 12% was wet-processed in alcohol.
Mix for hours. Chromium carbide, vanadium carbide, tantalum carbide, and molybdenum carbide were used as comparative cemented carbides.
【００２５】[0025]
【表３】 [Table 3]
【００２６】続いて、大気圧から−１０-1Ｔｏｒｒまで
減圧乾燥し、１０００ｋｇ／ｃｍ2の圧力でプレス成形
した。その後、真空下で１時間焼結後、１３５０℃で１
時間、アルゴンガス雰囲気下において１０００ｋｇ／ｃ
ｍ2 の熱間静水圧プレス処理を行った。比較超硬合金に
おいても、同様の方法で調整した。これらの焼結体をダ
イアモンド砥石で４ｍｍ×８ｍｍ×２５ｍｍのＪＩＳ片
に製作し、抗折力とロックウェル硬さについて測定し
た。超硬合金の粒度は、走査型電子顕微鏡により観察し
て測定した。Subsequently, the resultant was dried under reduced pressure from atmospheric pressure to -10 -1 Torr and press-molded at a pressure of 1000 kg / cm 2 . Then, after sintering for 1 hour under vacuum,
Time, 1000kg / c under argon gas atmosphere
m 2 hot isostatic pressing. The comparative cemented carbide was adjusted in the same manner. These sintered bodies were manufactured into a 4 mm × 8 mm × 25 mm JIS piece with a diamond grindstone, and the transverse rupture strength and Rockwell hardness were measured. The grain size of the cemented carbide was measured by observation with a scanning electron microscope.
【００２７】[0027]
【発明の効果】本発明は、前記のように、炭化クロム、
炭化バナジウム、炭化タンタル及び炭化モリブデン粉末
を、あらかじめ炭化タングステンと複合化した粉末を使
用することにより、高硬度で、高強度で、かつ、耐溶着
性がすぐれた超微粒超硬合金を製造することができる。The present invention provides, as described above, chromium carbide,
Manufacture of ultra-fine-grained cemented carbide with high hardness, high strength and excellent welding resistance by using vanadium carbide, tantalum carbide, and molybdenum carbide powder in combination with tungsten carbide in advance Can be.
Claims (5)
る。）、炭化クロム０．５〜１．５、炭化バナジウム
０．１〜０．５、炭化タンタル０．５〜４．０、炭化モ
リブデン０．５〜３．０で、残部が炭化タングステン及
び不可避不純物からなる組成を有することを特徴とする
超硬合金。1. Cobalt 5 to 20% by weight (the same applies hereinafter), chromium carbide 0.5 to 1.5, vanadium carbide 0.1 to 0.5, tantalum carbide 0.5 to 4.0, carbonized A cemented carbide comprising 0.5 to 3.0 molybdenum and a balance of tungsten carbide and unavoidable impurities.
径が０．５μｍ以下であることを特徴とする請求項１記
載の超硬合金。2. The cemented carbide according to claim 1, wherein the average particle size of tungsten carbide in the cemented carbide is 0.5 μm or less.
タル及び炭化モリブデン粉末を、あらかじめ炭化タング
ステンと複合化した粉末を用い、コバルト５〜２０、炭
化クロム０．５〜１．５、炭化バナジウム０．１〜０．
５、炭化タンタル０．５〜４．０、炭化モリブデン０．
５〜３．０で、残部が炭化タングステン及び不可避不純
物からなる組成を有することを特徴とする超硬合金の製
造方法。3. A powder obtained by complexing chromium carbide, vanadium carbide, tantalum carbide and molybdenum carbide powder with tungsten carbide in advance, using cobalt 5 to 20, chromium carbide 0.5 to 1.5, and vanadium carbide 0.1. ~ 0.
5, tantalum carbide 0.5 to 4.0, molybdenum carbide 0.
A method for producing a cemented carbide, which has a composition of 5 to 3.0, the balance being tungsten carbide and unavoidable impurities.
タングステン、酸化クロム、酸化バナジウム、酸化タン
タル、モリブデン及びカーボンの混合粉末を、不活性ガ
ス雰囲気中で加熱処理を施し、再度水素ガス雰囲気中で
加熱処理を施すことによって得た複合炭化物粉末である
ことを特徴する超硬合金の製造方法。4. The composite powder according to claim 3, wherein a mixed powder of tungsten oxide, chromium oxide, vanadium oxide, tantalum oxide, molybdenum and carbon is subjected to a heat treatment in an inert gas atmosphere, and hydrogen gas is again applied. A method for producing a cemented carbide, which is a composite carbide powder obtained by performing a heat treatment in an atmosphere.
径が０．５μｍ以下であることを特徴とする請求項３又
は４記載の超硬合金の製造方法。5. The method for producing a cemented carbide according to claim 3, wherein the average particle size of tungsten carbide in the cemented carbide is 0.5 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5006360A JP2626866B2 (en) | 1993-01-19 | 1993-01-19 | Cemented carbide and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5006360A JP2626866B2 (en) | 1993-01-19 | 1993-01-19 | Cemented carbide and its manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| JPH06212341A JPH06212341A (en) | 1994-08-02 |
| JP2626866B2 true JP2626866B2 (en) | 1997-07-02 |
Family
ID=11636200
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5006360A Expired - Fee Related JP2626866B2 (en) | 1993-01-19 | 1993-01-19 | Cemented carbide and its manufacturing method |
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| Country | Link |
|---|---|
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| KR20000024552A (en) * | 2000-02-21 | 2000-05-06 | 박영효 | A reform measure fo property by heat treatment of tungsten oxide |
| JP2002155336A (en) * | 2000-11-15 | 2002-05-31 | Fuji Dies Kk | Roll for grooving into strips for heat transfer tube production |
| KR100468215B1 (en) * | 2002-05-06 | 2005-01-26 | 국방과학연구소 | A method for coating thin film using tungsten oxide powders |
| CN103924111B (en) * | 2014-04-14 | 2016-04-20 | 北京工业大学 | The preparation method of a kind of Wimet nanometer particle size powder and high performance sintered block materials |
| CN107867691B (en) * | 2017-11-30 | 2020-07-31 | 株洲三鑫硬质合金生产有限公司 | Preparation method and application of high-quality coarse grain WC powder |
| DE102019110950A1 (en) * | 2019-04-29 | 2020-10-29 | Kennametal Inc. | Hard metal compositions and their applications |
| MX2024006049A (en) * | 2021-11-20 | 2024-06-04 | Hyperion Materials & Tech Inc | Improved cemented carbides. |
| US20250034682A1 (en) * | 2022-03-15 | 2025-01-30 | Sumitomo Electric Industries, Ltd. | Cemented carbide |
| CN117845088B (en) * | 2024-03-06 | 2024-05-28 | 崇义章源钨业股份有限公司 | Binding phase-free hard alloy and preparation method thereof |
| CN120591615B (en) * | 2025-07-14 | 2026-03-24 | Oppo广东移动通信有限公司 | Alloy materials and their preparation methods, structural components and electronic equipment |
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1993
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