JP3341776B2 - Super hard alloy - Google Patents
Super hard alloyInfo
- Publication number
- JP3341776B2 JP3341776B2 JP21150091A JP21150091A JP3341776B2 JP 3341776 B2 JP3341776 B2 JP 3341776B2 JP 21150091 A JP21150091 A JP 21150091A JP 21150091 A JP21150091 A JP 21150091A JP 3341776 B2 JP3341776 B2 JP 3341776B2
- Authority
- JP
- Japan
- Prior art keywords
- super
- hard alloy
- weight
- powder
- present
- 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 - Lifetime
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- Ceramic Products (AREA)
- Powder Metallurgy (AREA)
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 abrasion resistance, and mainly relates to abrasion-resistant parts having a small temperature rise, for example, a high-pressure water nozzle, a nozzle for a coating machine, a mold, a die and the like. And a super-hard alloy applied to the production of wear-resistant parts.
【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 4 to 20% by weight of Co is used.
Or WC-TiC-TaC (NbC) -Co-based W
C-base cemented carbide, Si 3 N 4 or Al 2 O 3 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 WC-based cemented carbide uses Co, an iron group metal, as a binder, it has a high strength but a hardness of 93% on a Rockwell A scale.
The above cemented carbide is difficult to produce, and cannot provide sufficient performance as a material for wear-resistant parts such as nozzles that require high wear resistance.In addition, if the content of the Co binder is reduced, sufficient strength is obtained. There was a problem that it could not be obtained.
【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
Based ceramics have a hardness of 9 on Rockwell A scale.
3, but the main component is Si 3 N 4 or A
Due to the low intergranular bonding force such as l 2 O 3 , there is a problem that the wear is less than that of cemented carbide with respect to crevice wear that does not increase in temperature, and the strength is 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。The present inventors have developed a super-hard alloy which is strong and has excellent wear resistance against crevice wear with a small temperature rise. WC, which is the main component of the alloy, can be prepared by adding an appropriate amount of Mo 2 C, or Mo and C, and sintering at a temperature of 1600 ° C. or more at a pressure of 100 atm or more without adding Co as a binder. , A dense sintered body is obtained,
r 3 C 2 , VC, NbC, TaC, TiC, ZrC, H
When one or more of the fCs are added in an appropriate amount, the structure becomes finer and finer, and high-hardness and high-strength sintered bodies are obtained. These sintered bodies are strong and have low temperature rise. They have found that they show excellent abrasion resistance even when they are worn.
【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 being contained in an ultra-hard alloy of 1% by weight or less, with the 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
００〜１９００℃の範囲内にあることが必要である。In order to obtain the super-hard alloy of the present invention, the sintering temperature must be 1600 ° C. or higher.
It needs 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 component composition of the super-hard alloy of the present invention is limited as described above will be described.
【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 improving the sinterability of the super-hard alloy of the present invention and for producing a dense and high-strength super-hard alloy. Cannot be obtained. On the other hand, if the content exceeds 20% by weight, the wear resistance of the super-hard alloy 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。[0010] Cr 3 C 2 , VC, NbC, TaC, Ti
One or more of C, ZrC and HfC are effective components for suppressing the grain growth of the super-hard alloy of the present invention and producing a high-hardness super-hard alloy.
If it is less than 0.2% by weight, the desired effect cannot be obtained.
If the content exceeds 10% by weight, the strength of the super-hard alloy decreases, so the content of these components is set to 0.2 to 2% by 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, the super-hard alloy of the present invention may contain Co, N
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 super hard alloy of the present invention is improved, and sintering at a low temperature becomes possible. However, if the content of these iron group metals exceeds 1% by weight, the wear resistance of the super-hard alloy decreases, so the content of these components is 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。EXAMPLES As raw material powder, W having an average particle size of 0.8 μm was used.
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 Tables 1 and 2, thereby producing 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 blended powders A to T are mixed in a ball mill for 72 hours.
After mixing for a time, press molding is performed to obtain a green compact, and this green compact is sintered in an argon atmosphere under the conditions shown in Tables 3 and 4, and has an outer diameter of 11 mm, an inner diameter of 0.5 mm, and a length of: 51m
Super hard alloys 1 to 12 of the present invention and a comparative super hard alloy 1 having substantially the same composition as the above-mentioned compounded powders A to T having a round bar shape with a hole of m
To 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
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 super-hard alloys 1 to 12 of the present invention and the comparative super-hard alloys 1 to 8 were obtained with an outer diameter of 10 mm and a length of 50 m.
m, and after measuring the hardness, using a round bar with holes as a nozzle, water containing alumina was blown out at a projection pressure of 8 kg / cm 2 , and the inner diameter was 0.6 mm.
The wear time was measured until
And 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 92.5 on a Rockwell A scale and an A of 93.0 on a Rockwell A scale are compared with each other for comparison.
A round bar with a hole having the above-mentioned dimensions and shape was prepared using l 2 O 3 -based ceramics, and water containing alumina was blown out at a protruding pressure of 8 kg / cm 2 , and the inner diameter was 0.1 kg / cm 2 .
The wear time until the thickness reached 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 can be seen that the super hard alloys 1 to 12 of the present invention have excellent wear resistance when used in a nozzle. However, comparative super-hard alloys 1 to 8 having 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 *), the conventional WC-Co-based alloys The cemented carbide and the conventional Al 2 O 3 -based ceramics are the cemented carbide 1 of the present invention.
It can be seen that all of them are inferior in abrasion resistance as compared with Nos. To 12.
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, one or more of Cr, V, Nb, Ta, Ti, Zr and Hf carbides: 0.2 to 2% by weight,
A super-hard alloy characterized by the balance consisting of 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 super-hard alloy according to claim 1, wherein one or more of Co, Ni and Fe are contained in an amount of 1% by weight or less.
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 JPH0533098A (en) | 1993-02-09 |
| JP3341776B2 true 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) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698002B1 (en) * | 1993-04-30 | 1997-11-05 | The Dow Chemical Company | Densified micrograin refractory metal or solid solution (mixed metal) carbide ceramics |
| US9624417B2 (en) * | 2012-10-09 | 2017-04-18 | Sandvik Intellectual Property Ab | Low binder, wear resistant hard metal |
| JP6182848B2 (en) * | 2012-10-30 | 2017-08-23 | ぺんてる株式会社 | 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 |
-
1991
- 1991-07-29 JP JP21150091A patent/JP3341776B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0533098A (en) | 1993-02-09 |
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