JPH0533098A - Cemented carbide - Google Patents

Cemented carbide

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Publication number
JPH0533098A
JPH0533098A JP3211500A JP21150091A JPH0533098A JP H0533098 A JPH0533098 A JP H0533098A JP 3211500 A JP3211500 A JP 3211500A JP 21150091 A JP21150091 A JP 21150091A JP H0533098 A JPH0533098 A JP H0533098A
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Prior art keywords
cemented carbide
powder
wt
table
wear
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JP3211500A
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JP3341776B2 (en
Inventor
Hironori Yoshimura
寛範 吉村
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Mitsubishi Materials Corp
三菱マテリアル株式会社
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Abstract

PURPOSE:To provide a cemented carbide applicable to the manufacture of wear resistant members small in the rise of temp. such as high pressure water nozzles, nozzles for a coating machine, metallic molds, dies or the like. CONSTITUTION:A cemented carbide having a compsn. contg., by weight, 2 to 20% Mo2C and 0.2 to 2% of one or >= two kinds among Cr3C2, VC, NbC, TaC, TiC, ZrC and HfC, furthermore contg., at need, <=1% of one or >= two kinds among Co, Ni and Fe and the balance WC is obtd.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、極めて耐摩耗性が高い超硬質合金に関するものであり、主として温度上昇の少ない耐摩耗部品、例えば、高圧水ノズル、塗装機用ノズル、金型、ダイスなどの耐摩耗部品の製造に適用される超硬質合金に関するものである。 BACKGROUND OF THE INVENTION This invention relates to extremely high wear-resistant cemented carbide, less wear parts with principally the temperature rise, for example, high-pressure water nozzle, atomizer nozzle, mold, die, etc. it relates super hard alloy to be applied in the production of wear-resistant components.

【0002】 [0002]

【従来の技術】従来、耐摩耗部品の製造にに適用される材料としては、Co:4〜20重量%含有のWC−Co Conventionally, as a material to be applied to the production of wear-resistant parts, Co: 4 to 20 wt% content of WC-Co
系もしくはWC−TiC−TaC(NbC)−Co系W System or WC-TiC-TaC (NbC) -Co-based W
C基超硬合金、Si 34系またはAl 23系セラミックスが用いられていた。 C-based cemented carbide, Si 3 N 4 system or Al 2 O 3 based ceramics have been used.

【0003】 [0003]

【発明が解決しようとする課題】しかし、上記WC基超硬合金は、鉄族金属のCoを結合剤としているので、強度は高いけれども硬さがロックウエルAスケールで93 [SUMMARY OF THE INVENTION] However, the WC-based cemented carbide, since the Co of iron group metals are the binder, although the strength is high hardness in Rockwell A scale 93
以上の超硬合金は作りにくく、高い耐摩耗性を必要とするノズルなどの耐摩耗部品の材料としては十分な性能が得られず、また、Co結合剤の含有量を減らすと十分な強度が得られないという問題点があった。 Does not form the above cemented carbide, sufficient performance can be obtained as a material for wear-resistant parts, such as nozzles that require high wear resistance, also have sufficient strength when reducing the content of Co binder there is a problem that can not be obtained.

【0004】一方、上記Si 34系またはAl 23 On the other hand, the Si 3 N 4 system or Al 2 O 3
系セラミックスは、硬さはロックウエルAスケールで9 System ceramics, hardness in Rockwell A scale 9
3を越えるものもあるが、主成分がSi 34またはA 3 some of which exceed, but the main component is Si 3 N 4 or A
23などの粒間結合力が低いために、温度の上がらないすきとり摩耗に対しては超硬合金よりも劣り、強度も超硬合金よりも低いという問題があった。 For l low 2 O 3 intergranular binding force, such as inferior to cemented carbide for likes tori wear does not increase the temperature, the strength was also a problem that is lower than the cemented carbide.

【0005】 [0005]

【課題を解決するための手段】そこで本発明者らは、強度があり、温度上昇の少ないすきとり摩耗に対しても優れた耐摩耗性を有する超硬質合金の開発を行ったところ、超硬合金の主成分であるWCは、結合剤のCoを添加しなくても、適量のMo 2 C、またはMoおよびCを添加して1600℃以上の温度で100気圧以上の圧力で焼結すれば、緻密な焼結体が得られ、これにさらにC Means for Solving the Problems] The present inventors have found that there is a strength, was subjected to development superhard alloy having excellent wear resistance even for small plow tori wear temperature rise, carbide WC is the main component of the alloy, without the addition of Co binder, if sintered in an appropriate amount of Mo 2 C, or Mo and added to 100 atm over a pressure at 1600 ° C. or more temperature C, , dense sintered body is obtained, further C to
32 、VC、NbC、TaC、TiC、ZrC、H r 3 C 2, VC, NbC , TaC, TiC, ZrC, H
fCのうち1種または2種以上の適量を添加すると、組織が一層緻密かつ微粒となり高硬度でかつ高強度の焼結体が得られ、これら焼結体は強度があり、温度上昇の少ないすきとり摩耗に対しても優れた耐摩耗性を示す、との知見を得たのである。 The addition of one or more appropriate amount of fC, tissue obtained sintered body having high hardness and high strength becomes more dense and fine, these sintered body has strength less plow temperature rise exhibits excellent wear resistance even to take wear, it is the knowledge was obtained with.

【0006】この発明は、かかる知見に基づいて成されたものであって、 Mo 2 C:2〜20重量%、Cr 32 、VC、Nb [0006] This invention, which was made on the basis of this finding, Mo 2 C: 2 to 20 wt%, Cr 3 C 2, VC , Nb
C、TaC、TiC、ZrC、HfCのうち1種または2種以上:0.2〜2重量%、を含有し、さらに必要に応じて、Co、NiおよびFeのうち1種または2種以上を1重量%以下含有し、残りがWCからなる超硬質合金に特徴を有するものである。 C, TaC, TiC, ZrC, one or more of HfC: 0.2 to 2 wt%, contains, further as necessary, Co, one or more of Ni and Fe 1 containing wt% or less, and it has the characteristics in super-hard alloy balance being WC.

【0007】この発明の超硬質合金を得るためには、焼結温度は1600℃以上であることが必要であるが、組織の微細な超硬質合金を得るためには、焼結温度は16 [0007] In order to obtain a super-hard alloy of the present invention, although the sintering temperature is required to be 1600 ° C. or more, in order to obtain a fine cemented carbide the tissue, the sintering temperature is 16
00〜1900℃の範囲内にあることが必要である。 It should be in the range of 00 to 1,900 ° C..

【0008】つぎに、この発明の超硬質合金の成分組成を上記のごとく限定した理由を説明する。 [0008] Next, the component composition of the super hard alloy of the present invention will be described the reason for limiting as described above.

【0009】Mo 2 Cは、この発明の超硬質合金の焼結性を高め、緻密で高強度の超硬質合金を作るに有効な成分であるが、その含有量が2重量%未満では、所望の効果が得られず、一方、20重量%を越えて含有すると超硬質合金の耐摩耗性が低下してしまうのでMo 2 Cの含有量は2〜20重量%に定めた。 [0009] Mo 2 C increases the sinterability of the super hard alloy of the present invention is an effective ingredient in making cemented carbide of dense and high strength, the content thereof is less than 2 wt%, optionally not effect of obtained, whereas, when the content exceeds 20 wt% because wear resistance of cemented carbide is decreased content of Mo 2 C was determined to 2-20% by weight.

【0010】Cr 32 、VC、NbC、TaC、Ti [0010] Cr 3 C 2, VC, NbC , TaC, Ti
C、ZrC、HfCのうち1種または2種以上は、この発明の超硬質合金の粒成長を抑制し、高硬度の超硬質合金をつくるに有効な成分であるが、これらの含有量が、 C, ZrC, 1 or two or more of HfC is to suppress grain growth of the super hard alloy of the present invention is an effective ingredient in making cemented carbide with high hardness, the content thereof,
0.2重量%未満では所望の効果が得られず、一方、2 Not obtained the desired effect is less than 0.2 wt%, whereas, 2
重量%を越えて含有すると超硬質合金の強度が低下してしまうので、これら成分の含有量は0.2〜2重量%に定めた。 Because when the content exceeds the weight percent strength cemented carbide is decreased, the content of these components defined in 0.2 to 2 wt%.

【0011】また、この発明の超硬質合金に、Co、N [0011] In addition, the super-hard alloy of the present invention, Co, N
iおよびFeのうち1種または2種以上を1重量%以下の微量含有してもよい。 i and one of Fe or two or more may contain trace amounts of 1 wt% or less. これら鉄族金属の微量添加により、この発明の超硬質合金の焼結性は向上し、低温での焼結が可能となる。 The dopants of these iron group metals, sintering of the cemented carbide of the present invention is improved and it becomes possible to sinter at a low temperature. しかし、これら鉄族金属の含有量が1重量%を越えて含有すると、超硬質合金の耐摩耗性が低下してしまうので、これら成分の含有量は1重量%以下に定めた。 However, if the content of iron group metals content exceeds 1 wt%, the wear resistance of cemented carbide is decreased, the content of these components defined in 1 wt% or less.

【0012】 [0012]

【実施例】原料粉末として、平均粒度:0.8μmのW As EXAMPLES raw material powder, average particle size: 0.8 [mu] m of W
C粉末、平均粒度:1.0μmのMo 2 C粉末、平均粒度:0.7μmのMo粉末、平均粒度:1.2μmのC C powder, average particle size: 1.0 .mu.m Mo 2 C powder, average particle size: 0.7 [mu] m of Mo powder, average particle size: 1.2 [mu] m for C
32粉末、平均粒度:1.5μmのVC粉末、いずれも平均粒度:1.0μmのNbC粉末およびTaC粉末、いずれも平均粒度:1.2μmのTiC粉末、Zr r 3 C 2 powder, average particle size: 1.5 [mu] m VC powder, both the average particle size: 1.0 .mu.m NbC powder and TaC powders of both average particle size: 1.2 [mu] m of TiC powder, Zr
C粉末、HfC粉末および黒鉛粉末、並びにいずれも平均粒度:1.5μmのCo粉末、Fe粉末、およびNi C powder, HfC powder and graphite powder, as well as any average particle size: 1.5 [mu] m Co powder, Fe powder, and Ni
粉末を用意し、これら原料粉末を表1および表2に示す組成となるように配合し、配合粉末A〜Tを作製した。 Powder was prepared, by blending these starting material powders so as to have the composition shown in Table 1 and Table 2, to prepare a blended powder A to T.

【0013】 [0013]

【表1】 [Table 1]

【0014】 [0014]

【表2】 [Table 2]

【0015】上記配合粉末A〜Tをボールミルにて72 [0015] The above ingredients powder A~T ball mill 72
時間混合し、プレス成形して圧粉体とし、この圧粉体をアルゴン雰囲気中、表3および表4に示す条件にて焼結し、外径:11mm、内径:0.5mm、長さ:51m Mixing time, the green compact by press-forming, and sintering the green compact in an argon atmosphere, under the conditions shown in Tables 3 and 4, the outer diameter: 11 mm, inner diameter: 0.5 mm, length: 51m
mの穴付き丸棒形状の上記配合粉末A〜Tとほぼ同一組成の本発明超硬質合金1〜12および比較超硬質合金1 The present invention cemented carbide having substantially the same composition as the blended powder A~T the slotted round bar shape m 1 to 12 and Comparative cemented carbide 1
〜8を作製した。 8 were prepared.

【0016】得られた本発明超硬質合金1〜12および比較超硬質合金1〜8を外径:10mm、長さ:50m [0016] The resulting invention the cemented carbide 12 and Comparative cemented carbide 1-8 outer diameter: 10 mm, length: 50 m
mに研磨仕上げし、硬さを測定した後、これら穴付き丸棒をノズルとして使用し、アルミナを含んだ水を突出圧:8Kg/cm 2で吹き出さしめ、内径が0.6mm polished finish m, after measuring the hardness, using these holes with a round bar as a nozzle, water projecting pressure containing alumina: tighten blown at 8 Kg / cm 2, an inner diameter of 0.6mm
になるまで摩耗する時間を測定し、それらの結果も表3 The time to wear measured until, Table 3 The results are also
および表4に示した。 And it is shown in Table 4.

【0017】さらに、比較のためにISO規格の硬さがロックウエルAスケールで92.5の従来WC−Co系超硬合金およびロックウエルAスケールで93.0のA Furthermore, conventional WC-Co-based cemented carbide 92.5 Hardness ISO standards are in Rockwell A scale for comparison and Rockwell A A scale 93.0
23基セラミックスを用いて上記寸法および形状を有する穴付き丸棒を作製し、同じくアルミナを含んだ水を突出圧:8Kg/cm 2で吹き出さしめ、内径が0. using l 2 O 3 based ceramic material to produce a slotted rod having the above dimensions and shape, the same water containing alumina projecting pressure: tighten blown at 8 Kg / cm 2, an inner diameter of 0.
6mmになるまで摩耗する時間を測定し、それらの結果も表5に示した。 Measuring the time of wear until 6 mm, it is also shown in Table 5 the results.

【0018】 [0018]

【表3】 [Table 3]

【0019】 [0019]

【表4】 [Table 4]

【0020】 [0020]

【表5】 [Table 5]

【0021】 [0021]

【発明の効果】表2〜表5に示される結果から、本発明超硬質合金1〜12はこれをノズルに用いた場合に優れた耐摩耗性を有することがわかる。 From the results table shown in 2 Table 5, according to the present invention, the present invention cemented carbide 1-12 found to have excellent wear resistance when using this nozzle. しかし、この発明の条件から外れた成分組成(表2において、この発明の条件から外れた組成に※印を付して示した。)を有する比較超硬質合金1〜8、従来WC−Co系超硬合金および従来Al 23基セラミックスは、本発明超硬質合金1 However, (in Table 2, the composition deviated from the conditions of the invention shows marked ※.) Component composition out of the range of the present invention compared cemented carbide 1-8 with, conventional WC-Co-based cemented carbide and conventional Al 2 O 3 based ceramic material, the present invention cemented carbide 1
〜12に比べていずれも耐摩耗性に劣ることが分かる。 It can be seen that both inferior in wear resistance as compared to 12.

Claims (1)

  1. 【特許請求の範囲】 【請求項1】 炭化モリブデン:2〜20重量%、 Cr、V、Nb、Ta、Ti、Zr、Hfの炭化物のうち1種または2種以上:0.2〜2重量%、を含有し、 Claims We claim: 1. A molybdenum carbide: 2-20 wt%, Cr, V, Nb, Ta, Ti, Zr, 1 or two or more of the carbides Hf: 0.2 to 2 weight %, containing,
    残りが炭化タングステンからなることを特徴とする超硬質合金。 Super hard alloy, wherein the balance being tungsten carbide. 【請求項2】 Co、NiおよびFeのうち1種または2種以上を1重量%以下含有することを特徴とする請求項1記載の超硬質合金。 Wherein Co, Ni and one or two or more, characterized in that it contains less than 1 wt% claim 1 superhard alloy according of Fe.
JP21150091A 1991-07-29 1991-07-29 Super-hard alloy Expired - Lifetime JP3341776B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21150091A JP3341776B2 (en) 1991-07-29 1991-07-29 Super-hard alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21150091A JP3341776B2 (en) 1991-07-29 1991-07-29 Super-hard alloy

Publications (2)

Publication Number Publication Date
JPH0533098A true JPH0533098A (en) 1993-02-09
JP3341776B2 JP3341776B2 (en) 2002-11-05

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ID=16606974

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JP21150091A Expired - Lifetime JP3341776B2 (en) 1991-07-29 1991-07-29 Super-hard alloy

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5612264A (en) * 1993-04-30 1997-03-18 The Dow Chemical Company Methods for making WC-containing bodies
JP2014087953A (en) * 2012-10-30 2014-05-15 Pentel Corp Ball for ballpoint pen
JP2016500755A (en) * 2012-10-09 2016-01-14 サンドビック インテレクチュアル プロパティー アクティエボラーグ Wear resistant hard metal with low binder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5612264A (en) * 1993-04-30 1997-03-18 The Dow Chemical Company Methods for making WC-containing bodies
US5681783A (en) * 1993-04-30 1997-10-28 The Dow Chemical Company Sintered WC-containing materials
JP2016500755A (en) * 2012-10-09 2016-01-14 サンドビック インテレクチュアル プロパティー アクティエボラーグ Wear resistant hard metal with low binder
JP2014087953A (en) * 2012-10-30 2014-05-15 Pentel Corp Ball for ballpoint pen

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Publication number Publication date
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