JPS6152081B2 - - Google Patents
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- Publication number
- JPS6152081B2 JPS6152081B2 JP54085877A JP8587779A JPS6152081B2 JP S6152081 B2 JPS6152081 B2 JP S6152081B2 JP 54085877 A JP54085877 A JP 54085877A JP 8587779 A JP8587779 A JP 8587779A JP S6152081 B2 JPS6152081 B2 JP S6152081B2
- Authority
- JP
- Japan
- Prior art keywords
- solid solution
- powder
- stable temperature
- carbide
- carbon
- 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
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- 229910052721 tungsten Inorganic materials 0.000 claims description 61
- 229910052750 molybdenum Inorganic materials 0.000 claims description 56
- 239000000843 powder Substances 0.000 claims description 31
- 239000006104 solid solution Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 238000003763 carbonization Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims 4
- 239000011733 molybdenum Substances 0.000 claims 4
- 239000002245 particle Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 150000001247 metal acetylides Chemical class 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- -1 Iron group metals Chemical class 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000010517 secondary reaction Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
- Powder Metallurgy (AREA)
Description
本発明は超硬合金の主原料である（Mo、Ｗ）
Ｃの固溶炭化物あるいは（Mo、Ｗ）（CN）の炭
窒化物の製造法に関し、特に均一な粒度を有する
該炭化物、炭窒化物の製造法に関する。
従来、超硬合金はWCを主成分としていたが、
タングステンは地球上に僅かしか発明できず高価
であるため、WCと同じ結晶構造、類似の機械的
性質を有するMoCで置換する方向にあるが、
MoCが不安定なため専らWCと固溶させることに
よりMoCを安定させた（Mo、Ｗ）Ｃ固溶体が超
硬合金の原料として用いられるようになつた。
このような炭化物あるいは炭窒化物を超硬合金
の原料として用いる場合に最も重要なことは、合
金中における硬質相の粒度とそれに対応する結合
相の厚みをいかに制御するかであり、これには原
料である（Mo、Ｗ）Ｃ、（Mo、Ｗ）（CN）粉末
の粒度が重要で、硬質相の粒度、粒度分布を揃え
るには原料粉末の均一度が最も重要である。
一般にａ、ａ、ａ族からなる複合炭化物
の製造法は、目的とする配合組成の組合わせで混
合した酸化物金属、炭化物等を高温で反応させる
か、あるいは拡散速度を増す添加物を加えて反応
を促進させることによる。しかしながら粉末間の
固相反応によつて得られる固溶体は、製造時の混
合のされ方や、使用する粉末の粒径、粒度分布等
によつて反応程度にバラツキが出る。これを均一
な固溶体とするには、MoCのMoの一部をＷで置
換してシンプル・ヘキサゴナル（Mo、Ｗ）Ｃ相
を安定化する特開昭51−146306号公報記載の方法
におけるように、長時間の加熱操作が必要であ
る。即ち、Mo、Ｗの金属もしくは炭化物の粉末
同志の拡散により均一な固溶体を得るにあたつ
て、数μのMo、Ｗの金属粉末を拡散固溶させよ
うとすると、1600℃以上の高温における長時間の
加熱が必要になつてくる。
本発明者等はこのような一般的方法で製造した
（Mo、Ｗ）Ｃ、（Mo、Ｗ）CNの粒度、粒度分布
を検討した結果、第１図に示すような反応形態で
あることを見出した。この方法では最終炭化物
（Mo、Ｗ）Ｃを得るのに好ましい量の組成物
MoC、WCを予め混合するが（特開昭51−146306
号、特開昭53−104617号公報）、反応前に多量の
炭素、および（Mo、Ｗ）Ｃの安定化のための
Co、Ni等の鉄族金属が添加される（ａ−１）。反
応の過程では（Mo、Ｗ）2C＋Ｃの形で１度安定
化するが（ａ−２）、これをその後の熱処理で
（Mo、Ｗ）Ｃに変換させるときは、その粒度、粒
径が変動する等の欠点が出る（ａ−３）。
一方、粉末粒子が非常に微細であれば拡散は容
易に行なわれ、しかも拡散助剤である多量の鉄族
金属が不要であるため良質な炭化物が得られる。
しかしながら、金属粉末、炭化物粉末では0.5μ
以下の粉末を工業的に得るのは難かしい。
そこで本発明者等は先にＷ、Mo等のアンモニ
ウム塩、あるいはその溶液状態で／または酸化
物、またはハロゲン化物の状態でMoとＷを混合
すれば、金属粉および／または炭化物粉の組合せ
に比べ、該混合粉末の混合がよくなり、比較的低
い加熱温度でも容易に均一固溶体となりうること
を見出した。例えばＷとMoを酸化物生成段階で
均一に混合し、これをH2中で還元すれば還元後
に（Mo、Ｗ）の固溶体となりうる。この金属粉
を炭素と反応させて固溶体化物とする最も工業的
な方法を提案した。
本発明は最終的に得られる（Mo、Ｗ）Ｃおよ
び（Mo、Ｗ）（CN）の固溶体粉末の粒度を均一
にする方法に関する。そのため、先ず（Mo、
Ｗ）の合金粉を予め合成し、この合金粉末に
（Mo、Ｗ）2Cを生成するために必要とされる最低
量の炭素のみを加え１次反応を行なわせる（第２
図ｂ−１）。このとき反応温度を後述の如く適当
に選ぶと、（Mo、Ｗ）2Cの粒成長を邪魔する余計
な炭素等が存在しないので均一な粒成長を行なわ
せることが出来る。該方法によつて粒成長させた
（Mo、Ｗ）2C粉末（ｂ−２）に最終炭化物組成に
必要とされる炭素、あるいは必要に応じてCo、
Ni等の鉄族金属を加え（ｂ−３）、（Mo、Ｗ）Ｃ
の安定温度で２次炭化を行なわしめると均一な粒
度分布を持つ（Mo、Ｗ）Ｃ粉末を得ることがで
きる（ｂ−４）。
また、（Mo、Ｗ）CNの炭窒化物は（Mo、Ｗ）
Ｃと同様な考え方で炭素配合された混合物を、炭
化過程の一部または全工程の炭化雰囲気を、N2
を含む雰囲気とすることによつて得ることができ
る。
本発明を実施するに当つて必要とされること
は、（Mo、Ｗ）Czあるいは（Mo、Ｗ）（CN）ｚ
等で表わされる炭化物、炭窒化物において、１次
反応前に添加される炭素の量はＺ＝0.4〜0.6の範
囲であることが望ましい。Ｚが0.4未満であると
（Mo、Ｗ）2Cとして安定せず、またｚが0.6を超
えると１次反応後の炭化物が（Mo、Ｗ）2C、
（Mo、Ｗ）Ｃの共存、あるいは（Mo、Ｗ）3C2の
状態となり、均一な粒成長が行なわれない。また
２次反応前に添加される炭素量は最終炭化物組成
が（Mo、Ｗ）Czあるいは（Mo、Ｗ）（CN）ｚで
表わされるｚの値で0.9〜1.0の範囲になるように
調整されるのが望ましい。ｚが0.9未満であると
最終合金の強度が出ない。またｚが1.0を超える
と最終合金の焼結が難かしい。
更に（Moa Wb）Cz、（Moa Wb）（CN）ｚと
表わしたとき、ａ0.8、ｂ0.2であるときの１
次加熱条件は1400℃以上が望ましい。1400℃以下
では（Mo、Ｗ）2Cはあまり安定せず、むしろ温
度が高い方が望ましく、また２次反応はこれと逆
で1400℃以下が望ましい。
ａ＜0.8、ｂ＞0.2の場合は、１次加熱条件は
1400℃以上であれば満足するが、1800℃以上が望
ましい。なお２次炭化反応は1800℃以下で
（Mo、Ｗ）Ｃとして安定するが、1400℃以下で更
に安定する。確実に、しかも短時間に反応を行な
わせるには、１次炭化されたもの（１次炭化物）
を一度室温にもどしたのち粉砕等の機械的歪を与
える処理をすることが更に望ましい。
実施例 １
Mo粉末54ｇ、Ｗ粉末46ｇを28％アンモニア水
に溶解した。このアンモニウム塩を塩酸で徐々に
中和すると針状の結晶が析出した。この共沈した
WO3とMoO3の混合はよく混ざつていた。この酸
化物を空気中で800℃で焼結した。この混合粉末
をNiボートに装入し、ボートに蓋をかぶせてH2
気流中1000℃で還元したところ２μの合金粉末と
なつた。
この（MO0.7 Ｗ0.3）の合金粉末に炭素粉末を
4.5重量％加え、ボールミルで36時間混合した。
該混合粉末を（MO0.7 Ｗ0.3）2Cのサブカーバイ
ドが安定する温度範囲、すなわち水素気流中1900
℃で１時間反応させた。該炭化物を１度冷却し、
ボールミルで１時間粉砕した。得られた（MO0.7
Ｗ0.3）2C粉末の粒度を測定したところ、８μの
粗粒炭化物となり、かつ粒度分布も小さい均粒な
粉末になつた。
該１次炭化物粉に4.5重量％の炭素及び１重量
％のCo2O3の粉末を加えた。再び、該炭化物のモ
ノカーバイドが安定する温度、すなわち水素気流
中1400℃で炭化した。得られた炭化物の特性を調
べたところ、表２に示す如く結合炭素が理論値近
く十分に入り、すべてWCタイプのモノカーバイ
ドになつていた。
The present invention is the main raw material of cemented carbide (Mo, W)
The present invention relates to a method for producing a solid solution carbide of C or a carbonitride of (Mo, W) (CN), and particularly relates to a method for producing the carbide or carbonitride having a uniform particle size. Conventionally, cemented carbide had WC as its main component, but
Since tungsten can only be invented in small quantities on earth and is expensive, there is a trend toward replacing it with MoC, which has the same crystal structure and similar mechanical properties as WC.
Because MoC is unstable, (Mo, W)C solid solution, which stabilizes MoC by forming a solid solution with WC, has come to be used as a raw material for cemented carbide. When using such carbides or carbonitrides as raw materials for cemented carbide, the most important thing is how to control the grain size of the hard phase in the alloy and the corresponding thickness of the binder phase. The particle size of the raw material (Mo, W) C, (Mo, W) (CN) powder is important, and the uniformity of the raw material powder is most important in order to equalize the particle size and particle size distribution of the hard phase. In general, the method for producing composite carbides consisting of groups A, A, and A involves reacting oxide metals, carbides, etc. mixed in the desired composition combination at high temperatures, or by adding additives that increase the diffusion rate. By accelerating the reaction. However, the degree of reaction of solid solutions obtained by solid-phase reactions between powders varies depending on the mixing method during production, the particle size and particle size distribution of the powders used, and the like. In order to make this a uniform solid solution, a part of Mo in MoC is replaced with W to stabilize the simple hexagonal (Mo, W)C phase, as in the method described in JP-A-51-146306. , a long heating operation is required. In other words, in order to obtain a uniform solid solution by diffusing Mo or W metal or carbide powders, if you try to diffuse a few micrometers of Mo or W metal powder into a solid solution, it will take a long time at high temperatures of 1600°C or higher. It will require some heating time. As a result of examining the particle size and particle size distribution of (Mo, W)C and (Mo, W)CN produced by such a general method, the present inventors found that the reaction pattern was as shown in Figure 1. I found it. In this method a preferred amount of the composition to obtain the final carbide (Mo,W)C
Although MoC and WC are mixed in advance (Japanese Patent Application Laid-Open No. 51-146306
(No., JP-A-53-104617), a large amount of carbon before the reaction, and for stabilizing (Mo, W)C.
Iron group metals such as Co and Ni are added (a-1). During the reaction process, (Mo, W) 2 is stabilized once in the form of C + C (a-2), but when it is converted to (Mo, W) C in the subsequent heat treatment, its particle size and particle size are There are drawbacks such as fluctuation (a-3). On the other hand, if the powder particles are very fine, diffusion can be easily carried out, and since a large amount of iron group metal as a diffusion aid is not required, a high-quality carbide can be obtained.
However, for metal powders and carbide powders, it is 0.5μ.
It is difficult to obtain the following powders industrially. Therefore, the present inventors believe that if Mo and W are first mixed in the form of an ammonium salt such as W or Mo, or its solution state, or an oxide, or halide state, a combination of metal powder and/or carbide powder can be obtained. In comparison, it has been found that the mixed powder mixes well and can easily form a uniform solid solution even at a relatively low heating temperature. For example, if W and Mo are uniformly mixed in the oxide generation stage and then reduced in H2 , a solid solution of (Mo, W) can be obtained after reduction. We proposed the most industrial method of reacting this metal powder with carbon to form a solid solution. The present invention relates to a method for uniformizing the particle size of the final solid solution powders of (Mo, W)C and (Mo,W)(CN). Therefore, first of all (Mo,
W) alloy powder is synthesized in advance, and only the minimum amount of carbon required to generate (Mo, W) 2 C is added to this alloy powder to carry out the primary reaction (secondary reaction).
Figure b-1). At this time, if the reaction temperature is appropriately selected as described below, uniform grain growth can be achieved because there is no extra carbon or the like that interferes with grain growth of (Mo, W) 2 C. The (Mo, W) 2 C powder (b-2) grain-grown by this method is supplemented with carbon required for the final carbide composition, or Co, if necessary.
Adding iron group metals such as Ni (b-3), (Mo, W)C
If secondary carbonization is carried out at a stable temperature of (Mo, W)C powder with a uniform particle size distribution can be obtained (b-4). Also, carbonitride of (Mo, W)CN is (Mo, W)
Using the same concept as C, the carbonization atmosphere for part or all of the carbonization process was changed to N 2
This can be obtained by creating an atmosphere containing What is required to carry out the present invention is (Mo, W)Cz or (Mo,W)(CN)z
In the carbides and carbonitrides represented by Z, it is desirable that the amount of carbon added before the primary reaction is in the range of Z=0.4 to 0.6. When Z is less than 0.4, it is not stable as (Mo, W) 2 C, and when z exceeds 0.6, the carbide after the primary reaction becomes (Mo, W) 2 C,
(Mo, W) C coexists or (Mo, W) 3 C 2 state occurs, and uniform grain growth does not occur. In addition, the amount of carbon added before the secondary reaction is adjusted so that the final carbide composition is in the range of 0.9 to 1.0 with the value of z expressed as (Mo, W) Cz or (Mo, W) (CN) z. It is desirable to If z is less than 0.9, the final alloy will not have sufficient strength. Furthermore, when z exceeds 1.0, it is difficult to sinter the final alloy. Furthermore, when expressed as (Moa Wb) Cz, (Moa Wb) (CN) z, 1 when a0.8 and b0.2
The next heating condition is preferably 1400°C or higher. At temperatures below 1400°C, (Mo, W) 2 C is not very stable, and higher temperatures are preferable, and vice versa for secondary reactions, preferably below 1400°C. If a<0.8, b>0.2, the primary heating conditions are
A temperature of 1400°C or higher is satisfactory, but a temperature of 1800°C or higher is desirable. The secondary carbonization reaction is stable as (Mo, W)C at temperatures below 1800°C, but becomes even more stable at temperatures below 1400°C. In order to carry out the reaction reliably and in a short time, primary carbonized materials (primary carbide) are required.
It is more desirable that the material is returned to room temperature and then subjected to mechanical strain such as pulverization. Example 1 54 g of Mo powder and 46 g of W powder were dissolved in 28% aqueous ammonia. When this ammonium salt was gradually neutralized with hydrochloric acid, needle-shaped crystals were precipitated. This coprecipitated
The mixture of WO3 and MoO3 was well mixed. This oxide was sintered at 800°C in air. Charge this mixed powder into a Ni boat, cover the boat with a lid, and add H2
When it was reduced in an air stream at 1000°C, it became an alloy powder of 2μ. Carbon powder is added to this (MO 0.7 W 0.3 ) alloy powder .
4.5% by weight was added and mixed in a ball mill for 36 hours.
The mixed powder was heated at 1900 ° C in a hydrogen stream, which is the temperature range where the (MO 0.7 W 0.3 ) 2 C subcarbide is stable .
The reaction was carried out at ℃ for 1 hour. Cool the carbide once,
It was ground in a ball mill for 1 hour. obtained ( MO 0.7
When the particle size of the W 0 . 3 ) 2 C powder was measured, it was found to be a coarse carbide of 8 μm and a uniform powder with a small particle size distribution. Powders of 4.5% by weight carbon and 1% by weight Co 2 O 3 were added to the primary carbide powder. Carbonization was carried out again at a temperature at which the monocarbide of the carbide is stable, that is, 1400° C. in a hydrogen stream. When the properties of the obtained carbide were investigated, as shown in Table 2, the amount of bonded carbon was sufficiently close to the theoretical value, and all of the carbides were WC type monocarbide.
【表】
実施例 ２
実施例１に示す製造法にて（Mo0.85 Ｗ0.15）Ｃ
の固溶炭化物の試作を試みた。実施例１の如くあ
らかじめ（Mo0.85 Ｗ0.15）の合金粉末を試作し該
合金粉末と5.0重量％の炭素粉末を十分混合し
た。該混合粉末を入れた黒鉛ボートを真空炉に挿
入し、1600℃まで約３時間かけて昇温し、最高温
度で１時間加熱した後、室温まで10時間で冷却し
た。粉末の炭素量を調べた結果を表３に示す。反
応率は50.2％であつた。このＸ線回折結果では、
（Mo、Ｗ）2Cのピークのみであつた。[Table] Example 2 (Mo 0 . 85 W 0 . 15 )C by the manufacturing method shown in Example 1
We attempted to create a prototype of solid solution carbide. As in Example 1 , an alloy powder of (Mo 0.85 W 0.15 ) was prepared in advance , and the alloy powder was thoroughly mixed with 5.0% by weight of carbon powder. The graphite boat containing the mixed powder was inserted into a vacuum furnace, heated to 1600° C. over about 3 hours, heated at the maximum temperature for 1 hour, and then cooled to room temperature over 10 hours. Table 3 shows the results of examining the carbon content of the powder. The reaction rate was 50.2%. In this X-ray diffraction result,
There was only a (Mo, W) 2 C peak.
【表】
結合炭素
反応率＝[Table] Bonded carbon reaction rate =
Claims (1)
窒化物もしくはタングステンとモリブデンの固溶
体からなる単純ヘキサゴナル型の結晶構造を有す
る１種もしくはそれ以上の硬質相から構成される
固溶体の製造において、モリブデンおよびタング
ステンの固溶体からなる合金粉末を得る工程、該
合金粉に（Mo、Ｗ）2Cおよび／または（Mo、
Ｗ）２（CN）を生成するのに必要な量の炭素を
加え、該混合物を（Mo、Ｗ）2Cおよび／または
（Mo、Ｗ）２（CN）の安定温度で加熱する工
程、該（Mo、Ｗ）2Cおよび／または（Mo、Ｗ）
２（CN）に（Mo、Ｗ）Ｃおよび／または
（Mo、Ｗ）（CN）が生成されるのに必要な量の炭
素及び必要に応じて鉄族金属を加え、（Mo、Ｗ）
Ｃおよび／または（Mo、Ｗ）（CN）の安定温度
で加熱する工程からなる、モリブデンを含む硬質
固溶体の製造方法。 ２ 特許請求の範囲第１項において、固溶体を
（Mo、Ｗ）Czまたは（Mo、Ｗ）（CN）ｚと表わ
したとき、１次炭化反応はＺ＝0.4〜0.6の範囲で
行ない、２次炭化反応はＺ＝0.9〜1.0の範囲とな
るように、炭素を加えることを特徴とする製造
法。 ３ 特許請求の範囲第１項において、該固溶体を
（Moa、Wb）Czまたは（Moa、Wb）（CN）ｚと
表わしたとき、ａ0.8、ｂ0.2の場合は、
（Mo、Ｗ）2Cおよび（Mo、Ｗ）２（CN）の安定
温度が1400℃以上であり、（Mo、Ｗ）Ｃおよび
（Mo、Ｗ）（CN）の安定温度が1400℃以下である
ことを特徴とする製造法。 ４ 特許請求の範囲第１項において、該固溶体を
（Moa、Wb）Czまたは（Moa、Wb）（CN）ｚと
表わしたとき、ａ＜0.8、ｂ＞0.2である場合は、
（Mo、Ｗ）2Cおよび（Mo、Ｗ）２（CN）の安定
温度が1400℃以上であり、（Mo、Ｗ）Ｃおよび
（Mo、Ｗ）（CN）の安定温度が1800℃以下である
ことを特徴とする製造法。[Claims] 1. In the production of a solid solution consisting of one or more hard phases having a simple hexagonal crystal structure consisting of a composite carbide or carbonitride of molybdenum and tungsten or a solid solution of tungsten and molybdenum, A step of obtaining an alloy powder consisting of a solid solution of molybdenum and tungsten, in which the alloy powder contains (Mo, W) 2 C and/or (Mo,
W) adding the amount of carbon necessary to form 2 (CN) and heating the mixture at a stable temperature of (Mo,W) 2C and/or (Mo,W) 2 (CN); (Mo, W) 2 C and/or (Mo, W)
2 Add the amount of carbon necessary to generate (Mo, W)C and/or (Mo, W) (CN) to (CN) and iron group metal as necessary, and add (Mo, W) to (CN).
A method for producing a hard solid solution containing molybdenum, comprising a step of heating at a stable temperature of C and/or (Mo, W) (CN). 2 In claim 1, when the solid solution is expressed as (Mo, W) Cz or (Mo, W) (CN) z, the primary carbonization reaction is performed in the range of Z = 0.4 to 0.6, and the secondary carbonization reaction is performed in the range of Z = 0.4 to 0.6. A manufacturing method characterized by adding carbon so that the carbonization reaction is in the range of Z = 0.9 to 1.0. 3 In claim 1, when the solid solution is expressed as (Moa, Wb) Cz or (Moa, Wb) (CN)z, in the case of a0.8 and b0.2,
(Mo, W) 2 C and (Mo, W) 2 (CN) have a stable temperature of 1400°C or higher, and (Mo, W) C and (Mo, W) (CN) have a stable temperature of 1400°C or lower. A manufacturing method characterized by: 4 In claim 1, when the solid solution is expressed as (Moa, Wb)Cz or (Moa, Wb)(CN)z, if a<0.8 and b>0.2,
(Mo, W) 2 C and (Mo, W) 2 (CN) have a stable temperature of 1400°C or higher, and (Mo, W) C and (Mo, W) (CN) have a stable temperature of 1800°C or lower. A manufacturing method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8587779A JPS5614411A (en) | 1979-07-09 | 1979-07-09 | Manufacture of molybdenum-containing hard solid solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8587779A JPS5614411A (en) | 1979-07-09 | 1979-07-09 | Manufacture of molybdenum-containing hard solid solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5614411A JPS5614411A (en) | 1981-02-12 |
| JPS6152081B2 true JPS6152081B2 (en) | 1986-11-12 |
Family
ID=13871122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8587779A Granted JPS5614411A (en) | 1979-07-09 | 1979-07-09 | Manufacture of molybdenum-containing hard solid solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5614411A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991001269A1 (en) * | 1989-07-20 | 1991-02-07 | Institut Strukturnoi Makrokinetiki Akademii Nauk Sssr | Method for obtaining molybdenum carbide |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2400632A1 (en) * | 2000-02-22 | 2001-08-30 | William Owers | Process for producing titanium carbide, titanium nitride, or tungsten carbide hardened materials |
-
1979
- 1979-07-09 JP JP8587779A patent/JPS5614411A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991001269A1 (en) * | 1989-07-20 | 1991-02-07 | Institut Strukturnoi Makrokinetiki Akademii Nauk Sssr | Method for obtaining molybdenum carbide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5614411A (en) | 1981-02-12 |
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