JPH0362666B2 - - Google Patents
Info
- Publication number
- JPH0362666B2 JPH0362666B2 JP60082033A JP8203385A JPH0362666B2 JP H0362666 B2 JPH0362666 B2 JP H0362666B2 JP 60082033 A JP60082033 A JP 60082033A JP 8203385 A JP8203385 A JP 8203385A JP H0362666 B2 JPH0362666 B2 JP H0362666B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- titanium carbonitride
- less
- ceramic material
- chromium carbide
- 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
Links
Landscapes
- Ceramic Products (AREA)
Description
〈産業上の利用分野〉
本発明は、高密度、高硬度及び高強度を有する
新規なセラミツクス材料に関するものであり、切
削工具用材料や高耐摩耗性機械部品用材料等多く
の用途があるものである。
〈従来の技術〉
TiCNはTiNとTiCとの固溶体として存在し、
ＣとＮとの比率を自由に配分できる。この様な
TiC、TiCNあるいはTiNを基とするセラミツク
スは殆どなく、僅かに特公昭59−107974号公報で
示される「耐熱用セラミツクス」、特公昭59−
89749号公報で示される「クロム化合物を含有す
る緻密なセラミツクス焼結体」、本発明者らが提
案し特公昭59−018349号公報に示される「炭窒化
チタン−硼化金属系セラミツクス」及び同特願昭
59−270943号の「炭窒化チタン系セラミツクス材
料」があるのみである。
〈発明が解決しようとする課題〉
前記特願昭59−270943号の「炭窒化チタン系セ
ラミツクス材料」は、TiCN−炭化クロム系と、
TiCN−炭化クロム−硼化物系の焼結材料が空隙
率が低下し難い傾向にあり、硬度はさほど高くな
い。
また前記特公昭59−107974号公報で示される
「耐熱用セラミツクス」や特公昭59−89749号公報
で示される「クロム化合物を含有する緻密なセラ
ミツク焼結体」は、炭化クロムを含有する為に硬
さがさほど高くはない。従つて切削工具用材料や
耐摩耗性部材用材料として利用する為にはその硬
度の改善が求められていた。
本発明はこれらの要望を満足するセラミツクス
材料を提供することを目的とするものである。
〈課題を解決する為の手段〉
TiCN−炭化クロム系と、TiCN−炭化クロム
−硼化金属系焼結体の物性改善を行うため、種々
の添加物を検討した結果、B4Ｃの添加効果が著
しいことを見出した。
即ち、本発明は、(A)炭素と窒素とのモル比が
１：９〜９：１の範囲にある炭窒化チタン粉末
に、(B)炭化クロム粉末を全量に対し１〜30重量
％、さらに(C)B4Ｃを0.1〜５重量％添加した混合
粉末、または該混合粉末を基本成分とし、さらに
(D)TiB2、CrB2、TaB2、MnB2、MoB2、VB2、
NbB2、HfB2、AlB2、ZrB2の二硼化金属、TiB、
CrB、TaB、MnB、MoB、VB、NbB、HfB、
ZrBの一硼化金属およびW2B5、Mo2B5の五二硼
化金属の中から選ばれた１種以上の硼化金属を全
量に対して95重量％以下（０は含まず）添加した
混合粉末を焼結して成る炭窒化チタン系セラミツ
クス材料に係るものである。
本発明の主成分である(A)成分の炭素と窒素との
モル比（α：β）を１：９から９：１までの範囲
とするのはこの範囲を逸脱するものでは、靭性の
優れたセラミツクス材料が得られないからであ
る。この炭窒化チタンは単独で用いてもよいし、
２種以上の混合物で用いてもよい。またこの炭窒
化チタン粉末の平均粒径は2μm以下、望ましくは
1μm以下である。
本発明において(B)成分として用いられる炭化ロ
クムには、Cr3C2、Cr4Ｃ、Cr7C3などの化合物が
あり、これらは単独で用いてもよいし、２種以上
組合わせて用いてもよい。この炭化クロム粉末の
平均粒径は2μm以下、望ましくは1μm以下がよ
い。
本発明においては、前記炭化クロム粉末の添加
量は、混合粉末全量当り１〜30重量％の範囲で選
ばれる。この量が１重量％未満又は30重量％を越
える場合は、所定の物性を有するセラミツクス材
料が得られないからである。
また(C)成分のB4Ｃは、0.1〜５重量％の添加に
より著しく緻密化が促進される。0.1重量％未満
又は５重量％を越えて添加すると緻密化し難くな
り、硬度の低下をまねく。このB4Ｃの平均粒径
も2μm以下、望ましくは1μm以下がよい。
次の(D)成分の硼化金属は、全量に対し95重量％
以下（０を含まず）添加するが、この硼化金属の
平均粒径も2μm以下、望ましくは1μm以下がよ
い。
本発明のセラミツクス材料は前記の各成分を混
合し、これまで知られているセラミツクス材料の
場合と同じ様な方法によつて製造することができ
る。例えば原料粉末混合物を金型に充填して、
0.5〜10ton／cm2程度のプレス圧により冷間圧縮
し、次いでラバープレスにより、さらに0.5〜
10ton／cm2以下程度の圧力のもとで圧縮成型した
圧粉体を真空中またはアルゴン中などの中性若し
くは還元性雰囲気中で1300〜1900℃、５〜300分
間焼結する。
また別の方法によると、原料粉末混合物を例え
ば、黒鉛型などの型に充填した後、真空中又はア
ルゴン、水素などの中性若しくは還元性雰囲気中
に於いて、ダイ圧力50〜300Kg／cm2、温度1300〜
2000℃の条件で、10〜200分間加熱焼結する、所
謂ホツトプレス法を用いて焼結できる。
〈実施例〉
以下本発明のセラミツクス材料をその実施例に
より更に詳述する。
下記第１表に示す如く、種々の割合に配合した
粉末を十分に混合した後、金型成型とラバープレ
ス成型を行い圧粉体を得た。この圧粉体を真空中
にて第１表に示す温度にて各々90分間焼結して得
られたセラミツクス焼結体について各々抗折力、
空隙率及びビツカース硬度を測定した結果を第１
表に示す。なお比較のために、本発明以下の場合
の結果も併記した。
<Industrial Application Field> The present invention relates to a new ceramic material having high density, high hardness, and high strength, and has many uses such as a material for cutting tools and a material for highly wear-resistant mechanical parts. It is. <Conventional technology> TiCN exists as a solid solution of TiN and TiC,
The ratio of C and N can be distributed freely. Like this
There are almost no ceramics based on TiC, TiCN or TiN, and there are only a few ceramics based on ``heat-resistant ceramics'' disclosed in Japanese Patent Publication No. 59-107974,
``Dense ceramic sintered body containing a chromium compound'' disclosed in Japanese Patent Publication No. 89749, ``Titanium carbonitride-metal boride ceramic'' proposed by the present inventors and disclosed in Japanese Patent Publication No. 59-018349, and the same. special request
There is only ``Titanium Carbonitride Ceramics Material'' in No. 59-270943. <Problem to be solved by the invention> The "titanium carbonitride ceramic material" of the above-mentioned Japanese Patent Application No. 59-270943 is based on TiCN-chromium carbide,
TiCN-chromium carbide-boride based sintered materials tend to have less porosity and are not very hard. Furthermore, the "heat-resistant ceramics" disclosed in Japanese Patent Publication No. 59-107974 and the "dense ceramic sintered body containing a chromium compound" disclosed in Japanese Patent Publication No. 59-89749 contain chromium carbide. Hardness is not very high. Therefore, in order to use it as a material for cutting tools or a material for wear-resistant members, it has been required to improve its hardness. The object of the present invention is to provide a ceramic material that satisfies these demands. <Means for solving the problem> As a result of examining various additives to improve the physical properties of TiCN-chromium carbide and TiCN-chromium carbide-metal boride sintered bodies, we found that the effect of adding B 4 C was was found to be significant. That is, in the present invention, (A) titanium carbonitride powder having a molar ratio of carbon to nitrogen in the range of 1:9 to 9:1, and (B) chromium carbide powder in an amount of 1 to 30% by weight based on the total amount, Furthermore, a mixed powder to which 0.1 to 5% by weight of (C)B 4 C is added, or the mixed powder is used as a basic component, and
(D) TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 ,
NbB 2 , HfB 2 , AlB 2 , ZrB 2 metal diboride, TiB,
CrB, TaB, MnB, MoB, VB, NbB, HfB,
95% by weight or less of one or more metal borides selected from metal monoboride of ZrB and metal pentaboride of W 2 B 5 and Mo 2 B 5 based on the total amount (excluding 0) This relates to a titanium carbonitride ceramic material made by sintering the added mixed powder. The molar ratio (α:β) of carbon to nitrogen of component (A), which is the main component of the present invention, is in the range of 1:9 to 9:1 because materials outside this range have excellent toughness. This is because it is not possible to obtain ceramic materials with high quality. This titanium carbonitride may be used alone,
A mixture of two or more types may be used. In addition, the average particle size of this titanium carbonitride powder is 2 μm or less, preferably
It is 1 μm or less. The carbide locum used as component (B) in the present invention includes compounds such as Cr 3 C 2 , Cr 4 C, and Cr 7 C 3 , and these may be used alone or in combination of two or more. May be used. The average particle size of this chromium carbide powder is preferably 2 μm or less, preferably 1 μm or less. In the present invention, the amount of the chromium carbide powder added is selected within the range of 1 to 30% by weight based on the total amount of the mixed powder. This is because if this amount is less than 1% by weight or more than 30% by weight, a ceramic material having predetermined physical properties cannot be obtained. Further, when B 4 C, component (C), is added in an amount of 0.1 to 5% by weight, densification is significantly promoted. If less than 0.1% by weight or more than 5% by weight is added, densification becomes difficult, leading to a decrease in hardness. The average particle diameter of this B 4 C is also preferably 2 μm or less, preferably 1 μm or less. The following metal boride component (D) is 95% by weight based on the total amount.
The following (not including 0) is added, and the average particle size of this metal boride is also 2 μm or less, preferably 1 μm or less. The ceramic material of the present invention can be produced by mixing the above-mentioned components and using a method similar to that used for conventionally known ceramic materials. For example, by filling a mold with a raw material powder mixture,
Cold compression is performed using a press pressure of approximately 0.5 to 10 ton/cm 2 , and then further compressed by a rubber press to a pressure of 0.5 to 10
The green compact compacted under a pressure of about 10 tons/cm 2 or less is sintered at 1300 to 1900° C. for 5 to 300 minutes in a neutral or reducing atmosphere such as vacuum or argon. According to another method, after filling a raw material powder mixture into a mold such as a graphite mold, the raw material powder mixture is placed in a vacuum or in a neutral or reducing atmosphere such as argon or hydrogen at a die pressure of 50 to 300 Kg/cm 2 . , temperature 1300~
It can be sintered using the so-called hot press method, which involves heating and sintering at 2000°C for 10 to 200 minutes. <Examples> The ceramic material of the present invention will be described in more detail below with reference to Examples. As shown in Table 1 below, powders blended in various proportions were thoroughly mixed and then molded with a mold and rubber press molded to obtain green compacts. The transverse rupture strength of each ceramic sintered body obtained by sintering this green compact in vacuum at the temperature shown in Table 1 for 90 minutes,
The results of measuring the porosity and Vickers hardness are
Shown in the table. For comparison, results for cases below the present invention are also shown.
【表】
＊は比較データー
この第１表に示す結果から、試料No.３、No.５、
No.７、No.９及びNo.16のいずれの材料も僅かな量の
B4Ｃを添加する事により、その空隙率が大幅に
低下し、緻密な焼結体が得られ、それに伴つて抗
折力や硬度が大となつている事が判る。しかし
B4Ｃの量があまり多過ぎると抗折力及び硬度が
低下しはじめるので５重量％以内とする事が好ま
しい。
〈発明の効果〉
以上述べて来た如く、本発明によれば高密度
で、高硬度、高強度な炭窒化チタン基のセラミツ
クス材料が得られ切削工具材料や耐摩耗性材料と
して適している。
また本発明のセラミツクス材料は、それを大気
中600℃以上の条件で使用するとCr2O3を生成し、
その結果摩擦係数が小となり高温域で用いる摺動
部材用材料として優れている。[Table] * indicates comparative data From the results shown in this table 1, samples No. 3, No. 5,
All materials No. 7, No. 9 and No. 16 contain a small amount.
It can be seen that by adding B 4 C, the porosity is significantly reduced, a dense sintered body is obtained, and the transverse rupture strength and hardness are increased accordingly. but
If the amount of B 4 C is too large, the transverse rupture strength and hardness will begin to decrease, so it is preferably within 5% by weight. <Effects of the Invention> As described above, according to the present invention, a titanium carbonitride-based ceramic material having high density, high hardness, and high strength can be obtained, and is suitable as a cutting tool material or a wear-resistant material. Furthermore, when the ceramic material of the present invention is used in the atmosphere at a temperature of 600°C or higher, it generates Cr 2 O 3 .
As a result, the coefficient of friction is small, making it an excellent material for sliding members used in high temperature ranges.
Claims (1)
％、残部が炭素と窒素とのモル比が１：９〜９：
１の範囲にある炭窒化チタンから成る炭化硼素を
含有する炭窒化チタン系セラミツクス材料。 ２ 炭化クロム１〜30重量％、B4C0.1〜５重量
％、残部が炭素と窒素とのモル比が１：９〜９：
１の範囲にある炭窒化チタンから成る基本成分に
対し、TiB2、CrB2、TaB2、MnB2、MoB2、
VB2、NbB2、HfB2、AlB2、ZrB2、TiB、CrB、
TaB、MnB、MoB、VB、NbB、HfB、ZrB、
W2B5、Mo2B5の硼化金属の中から選ばれた１種
以上を全量に対して95重量％以下（０は含まず）
添加せしめて成る炭化硼素を含有する炭窒化チタ
ン系セラミツクス材料。[Scope of Claims] 1 1 to 30% by weight of chromium carbide, 0.1 to 5% by weight of B 4 C, and the remainder having a molar ratio of carbon to nitrogen of 1:9 to 9:
A titanium carbonitride-based ceramic material containing boron carbide consisting of titanium carbonitride in the range of 1. 2 1 to 30% by weight of chromium carbide, 0.1 to 5% by weight of B 4 C, and the remainder has a molar ratio of carbon to nitrogen of 1:9 to 9:
1, TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 ,
VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , TiB, CrB,
TaB, MnB, MoB, VB, NbB, HfB, ZrB,
95% by weight or less of the total amount of one or more selected from metal borides such as W 2 B 5 and Mo 2 B 5 (excluding 0)
A titanium carbonitride ceramic material containing added boron carbide.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60082033A JPS61242958A (en) | 1985-04-16 | 1985-04-16 | Boron carbide-containing titanium carbonitirde base ceramic material |
| AU51594/85A AU5159485A (en) | 1984-12-24 | 1985-12-23 | Sintered titanium carbo-nitride-chromium carbide ceramics |
| EP85309511A EP0189677A3 (en) | 1984-12-24 | 1985-12-24 | Sintered titanium carbo-nitride ceramics |
| US07/068,740 US4808557A (en) | 1984-12-24 | 1987-06-30 | Sintered titanium carbo-nitride ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60082033A JPS61242958A (en) | 1985-04-16 | 1985-04-16 | Boron carbide-containing titanium carbonitirde base ceramic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61242958A JPS61242958A (en) | 1986-10-29 |
| JPH0362666B2 true JPH0362666B2 (en) | 1991-09-26 |
Family
ID=13763214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60082033A Granted JPS61242958A (en) | 1984-12-24 | 1985-04-16 | Boron carbide-containing titanium carbonitirde base ceramic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61242958A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5093993B2 (en) * | 2005-04-06 | 2012-12-12 | 学校法人東海大学 | Ceramic sintered body |
-
1985
- 1985-04-16 JP JP60082033A patent/JPS61242958A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61242958A (en) | 1986-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4492764A (en) | Sintered ceramic body containing titanium carbonitride | |
| JPH0583514B2 (en) | ||
| US4808557A (en) | Sintered titanium carbo-nitride ceramics | |
| JPH02217359A (en) | Titanium carbon nitride based toughened ceramics | |
| JPH0362666B2 (en) | ||
| US4704372A (en) | High-strength molybdenum silicide-based ceramic material and process for producing the same | |
| US5036028A (en) | High density metal boride-based ceramic sintered body | |
| JP2863829B2 (en) | High toughness, high strength, high hardness alumina-based composite material | |
| JPH069264A (en) | Wc-al2o3 sintered composite compact | |
| JPH0122233B2 (en) | ||
| JPH08176696A (en) | Production of diamond dispersed ceramic composite sintered compact | |
| JP3051603B2 (en) | Titanium compound sintered body | |
| JPS63282166A (en) | High-density metal boride-base sintered ceramics body | |
| JPS6339541B2 (en) | ||
| JPS6332750B2 (en) | ||
| JPH0710747B2 (en) | Boride-zirconium oxide-carbonitride ceramic materials | |
| JPH03290355A (en) | Al2o3-wc-based high-strength-high-toughness sintered material | |
| JPS62260775A (en) | Titanium carbide-hafnium-boride metal base ceramic material(2) | |
| JPS6143308B2 (en) | ||
| JPH07822B2 (en) | High density metal boride based ceramics | |
| JPS6353150B2 (en) | ||
| JPH04104957A (en) | Titanium carbonitride ceramic material having high toughness | |
| JPH0432032B2 (en) | ||
| JPH06219851A (en) | Zro2 added high toughness boride ceramics | |
| JPH0725589B2 (en) | High toughness titanium carbonitride-zirconium oxide ceramic material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |