JPH0533098A - Cemented carbide - Google Patents
Cemented carbideInfo
- 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
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- weight
- powder
- present
- wear
- 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
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- Ceramic Products (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【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 1. Field of the Invention The present invention relates to a super-hard alloy having extremely high wear resistance, and mainly wear-resistant parts having a small temperature rise, such as high-pressure water nozzles, coating machine nozzles, molds, dies, etc. The present invention relates to a super hard alloy applied to the production of wear resistant parts of
【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
系もしくはＷＣ−ＴｉＣ−ＴａＣ（ＮｂＣ）−Ｃｏ系Ｗ
Ｃ基超硬合金、Ｓｉ3 Ｎ4 系またはＡｌ2 Ｏ3 系セラミ
ックスが用いられていた。2. Description of the Related Art Conventionally, as a material applied to the production of wear-resistant parts, WC-Co containing Co: 4 to 20% by weight is used.
System or WC-TiC-TaC (NbC) -Co system W
C-based cemented carbide, Si 3 N 4 system or Al 2 O 3 system 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
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。However, since the above WC-based cemented carbide uses Co of the iron group metal as a binder, it has a high strength but a hardness of 93 on the Rockwell A scale.
The above cemented carbide is difficult to make, and sufficient performance cannot be obtained as a material for wear-resistant parts such as nozzles that require high wear resistance. Also, if the content of Co binder is reduced, sufficient strength is obtained. There was a problem that I could not get it.
【０００４】一方、上記Ｓｉ3 Ｎ4 系またはＡｌ2 Ｏ3
系セラミックスは、硬さはロックウエルＡスケールで９
３を越えるものもあるが、主成分がＳｉ3 Ｎ4 またはＡ
ｌ2 Ｏ3 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。On the other hand, the above Si 3 N 4 system or Al 2 O 3
The hardness of ceramics is 9 on the Rockwell A scale.
Some of them exceed 3, but the main component is Si 3 N 4 or A
Since the intergranular bonding force of l 2 O 3 and the like is low, there is a problem that it is inferior to cemented carbide with respect to crevice wear that does not rise in temperature, and its strength is also lower than that of 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Ｍｏ2 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
ｒ3 Ｃ2 、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。Therefore, the inventors of the present invention have developed a super hard alloy having strength and excellent wear resistance even against crevice wear with little temperature rise. WC, which is the main component of the alloy, can be obtained by adding an appropriate amount of Mo 2 C, or Mo and C, and sintering at a temperature of 1600 ° C. or more and a pressure of 100 atm or more without adding Co as a binder. , A dense sintered body is obtained, and further C
r 3 C 2 , VC, NbC, TaC, TiC, ZrC, H
When one or more of fC is added in an appropriate amount, the structure becomes more dense and fine grained, and a sintered body having high hardness and high strength is obtained. These sintered bodies have strength and a low temperature rise. We have obtained the knowledge that it exhibits excellent wear resistance even with respect to abrasion wear.
【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、
Ｍｏ2 Ｃ：２〜２０重量％、Ｃｒ3 Ｃ2 、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。The present invention has been made on the basis of the above findings, and includes: Mo 2 C: 2 to 20% by weight, Cr 3 C 2 , VC, Nb.
One or more of C, TaC, TiC, ZrC, and HfC: 0.2 to 2% by weight, and, if necessary, one or more of Co, Ni, and Fe. It is characterized by a superhard alloy containing 1% by weight or less and the rest 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
００〜１９００℃の範囲内にあることが必要である。In order to obtain the superhard alloy of the present invention, the sintering temperature must be 1600 ° C. or higher, but in order to obtain the superhard alloy having a fine structure, the sintering temperature is 16
It is necessary to be in the range of 00 to 1900 ° 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。Next, the reason why the composition of the cemented carbide of the present invention is limited as described above will be explained.
【０００９】Ｍｏ2 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Ｍｏ2 Ｃの含
有量は２〜２０重量％に定めた。Mo 2 C is an effective component for enhancing the sinterability of the superhard alloy of the present invention and producing a dense and high-strength superhard alloy, but if its content is less than 2% by weight, it is desirable. However, if the content exceeds 20% by weight, the wear resistance of the cemented carbide decreases, so the content of Mo 2 C is set to 2 to 20% by weight.
【００１０】Ｃｒ3 Ｃ2 、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、
０．２重量％未満では所望の効果が得られず、一方、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。Cr 3 C 2 , VC, NbC, TaC, Ti
One, two or more of C, ZrC, and HfC are effective components for suppressing grain growth of the superhard alloy of the present invention and producing a high-hardness superhard alloy, but the content of these is
If it is less than 0.2% by weight, the desired effect cannot be obtained.
Since the strength of the cemented carbide decreases if it is contained in excess of weight%, the content of these components is set to 0.2 to 2 weight%.
【００１１】また、この発明の超硬質合金に、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。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。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。Further, Co, N is added to the superhard alloy of the present invention.
One or more of i and Fe may be contained in a trace amount of 1% by weight or less. By adding a small amount of these iron group metals, the sinterability of the superhard alloy of the present invention is improved and it becomes possible to sinter at a low temperature. However, if the content of these iron group metals exceeds 1% by weight, the wear resistance of the cemented carbide decreases, so the content of these components was set to 1% by weight or less.
【００１２】[0012]
【実施例】原料粉末として、平均粒度：０．８μｍのＷ
Ｃ粉末、平均粒度：１．０μｍのＭｏ2 Ｃ粉末、平均粒
度：０．７μｍのＭｏ粉末、平均粒度：１．２μｍのＣ
ｒ3 Ｃ2 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
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
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。[Example] As a raw material powder, W having an average particle size of 0.8 μm
C powder, Mo 2 C powder having an average particle size of 1.0 μm, Mo powder having an average particle size of 0.7 μm, C having an average particle size of 1.2 μm
r 3 C 2 powder, VC powder having an average particle size of 1.5 μm, NbC powder and TaC powder having an average particle size of 1.0 μm, TiC powder having an average particle size of 1.2 μm, Zr
C powder, HfC powder and graphite powder, and Co powder, Fe powder, and Ni, each having an average particle size of 1.5 μm.
Powders were prepared, and these raw material powders were blended so as to have the compositions shown in Table 1 and Table 2 to prepare blended powders 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
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
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
〜８を作製した。The above-mentioned compounded powders A to T are 72 in a ball mill.
After mixing for a period of time and press forming into a green compact, the green compact is sintered under an argon atmosphere under the conditions shown in Tables 3 and 4, and the outer diameter is 11 mm, the inner diameter is 0.5 mm, and the length is: 51m
Inventive superhard alloys 1 to 12 and comparative superhard alloy 1 having substantially the same composition as the above-mentioned compounded powders A to T in the shape of a round bar with a hole of m.
~ 8 were produced.
【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
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／ｃｍ2 で吹き出さしめ、内径が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
および表４に示した。The obtained superhard alloys 1 to 12 of the present invention and the comparative superhard alloys 1 to 8 have an outer diameter of 10 mm and a length of 50 m.
After polishing to m and measuring the hardness, these round bars with holes were used as nozzles, and water containing alumina was blown out at a protrusion pressure of 8 Kg / cm 2 , and the inner diameter was 0.6 mm.
The time to wear is measured and the results are also shown in Table 3.
And 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
ｌ2 Ｏ3 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／ｃｍ2 で吹き出さしめ、内径が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。Further, for comparison, a conventional WC-Co cemented carbide having a hardness of ISO standard of 92.5 on the Rockwell A scale and an A of 93.0 on the Rockwell A scale.
A round bar with a hole having the above-mentioned size and shape was prepared using l 2 O 3 -based ceramics, and water containing alumina was blown out at a projecting pressure of 8 kg / cm 2 and an inner diameter of 0.
The time to wear to 6 mm was measured and the results are also shown in Table 5.
【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。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Ａｌ2 Ｏ3 基セラミックスは、本発明超硬質合金１
〜１２に比べていずれも耐摩耗性に劣ることが分かる。From the results shown in Tables 2 to 5, it is understood that the superhard alloys 1 to 12 of the present invention have excellent wear resistance when they are used in the nozzle. However, the comparative superhard alloys 1 to 8 having the component compositions deviating from the conditions of the present invention (in Table 2, the compositions deviating from the conditions of the present invention are marked with *), conventional WC-Co system The cemented carbide and conventional Al 2 O 3 -based ceramics are the cemented carbide of the present invention 1
It can be seen that the wear resistance is inferior to that of each of Nos.
Claims (2)
ち１種または２種以上：０．２〜２重量％、を含有し、
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。1. Molybdenum carbide: 2 to 20% by weight, and one or more of carbides of Cr, V, Nb, Ta, Ti, Zr, and Hf: 0.2 to 2% by weight,
A superhard alloy characterized by the balance being tungsten carbide.
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。2. The superhard alloy according to claim 1, containing 1% by weight or less of one or more of Co, Ni and Fe.
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 |
Family
ID=16606974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21150091A Expired - Lifetime JP3341776B2 (en) | 1991-07-29 | 1991-07-29 | Super hard alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3341776B2 (en) |
Cited By (5)
| 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 |
| CN110202155A (en) * | 2019-06-20 | 2019-09-06 | 蓬莱市超硬复合材料有限公司 | A method of preparing high-strength and high ductility hard alloy cutter basis material |
| CN111809093A (en) * | 2020-07-21 | 2020-10-23 | 广东正信硬质材料技术研发有限公司 | Wear-resistant hard alloy and preparation method thereof |
-
1991
- 1991-07-29 JP JP21150091A patent/JP3341776B2/en not_active Expired - Lifetime
Cited By (6)
| 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 |
| CN110202155A (en) * | 2019-06-20 | 2019-09-06 | 蓬莱市超硬复合材料有限公司 | A method of preparing high-strength and high ductility hard alloy cutter basis material |
| CN111809093A (en) * | 2020-07-21 | 2020-10-23 | 广东正信硬质材料技术研发有限公司 | Wear-resistant hard alloy and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3341776B2 (en) | 2002-11-05 |
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