JPH06212202A - Production of high-density sintered body of high melting metal - Google Patents
Production of high-density sintered body of high melting metalInfo
- Publication number
- JPH06212202A JPH06212202A JP5026175A JP2617593A JPH06212202A JP H06212202 A JPH06212202 A JP H06212202A JP 5026175 A JP5026175 A JP 5026175A JP 2617593 A JP2617593 A JP 2617593A JP H06212202 A JPH06212202 A JP H06212202A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- sintered body
- powder
- density
- treatment
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000002844 melting Methods 0.000 title abstract description 10
- 230000008018 melting Effects 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 43
- 238000005245 sintering Methods 0.000 claims abstract description 42
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 28
- 229910019589 Cr—Fe Inorganic materials 0.000 claims abstract description 7
- 239000003870 refractory metal Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 3
- 238000001513 hot isostatic pressing Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000006104 solid solution Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 11
- 239000002775 capsule Substances 0.000 abstract description 3
- 230000002706 hydrostatic effect Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 238000000280 densification Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009766 low-temperature sintering Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高融点金属からなる高
緻密質の焼結製品を製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a highly dense sintered product made of a refractory metal.
【０００２】[0002]
【従来の技術】粉末冶金法により製造される焼結金属製
品を、強度、靱性等にすぐれたものとするには、その焼
結処理において焼結体の高密度化を十分に達成すること
が必要である。焼結体の高密度化には高温焼結処理を必
要とするが、高加圧力を作用させて焼結を行う場合は、
高圧力エネルギー付加の効果として焼結温度をそれ程高
めずに焼結体を高密度化することができ、従来よりその
焼結法として熱間静水圧加圧焼結法（ＨＩＰ焼結法）が
行われてきた。ＨＩＰ焼結法によれば、不活性ガス（Ａ
ｒガス）を圧力媒体とする高加圧力の均一な作用下に焼
結反応を生じ、真密度に近い高緻密性を有する、均質か
つ寸法精度の良好な焼結製品を得ることができる。ＨＩ
Ｐ焼結法には、原料粉末をカプセルで真空密封してＨＩ
Ｐ処理する方法と、予め他の成形焼結法により所定形状
を有する焼結体を製造し、これをカプセルに封入するこ
となくＨＩＰ処理する方法（カプセルフリーＨＩＰ法）
とがあり、複雑形状を有する焼結製品を製造する場合に
は、焼結処理後のストリツピング（機械加工によるカプ
セルの除去処理工程）を必要としないカプセルフリーＨ
ＩＰ法が適用される。カプセルフリーＨＩＰ法では、被
処理物の表面に直接圧力媒体（Ａｒガス）が接触するの
で、ポロシテイの大きい被処理物では、圧力媒体ガスが
被処理物の空孔に侵入し、有効圧力伝達を確保し得ず、
ＨＩＰ処理効果としての高密度化を十分に達成すること
ができない。このため、焼結体を被処理物としてカプセ
ルフリーＨＩＰ処理による十分な高密度化を達成するに
は、その焼結体は相対密度約９０％以上の緻密性を有す
るものであることが必要とされている。2. Description of the Related Art In order to make a sintered metal product manufactured by powder metallurgy excellent in strength, toughness, etc., it is necessary to sufficiently attain a high density of a sintered body in the sintering process. is necessary. High-temperature sintering treatment is required to increase the density of the sintered body, but when applying high pressure to perform sintering,
As a result of the addition of high pressure energy, the sintered body can be densified without increasing the sintering temperature so far, and the hot isostatic pressing method (HIP sintering method) has been conventionally used as the sintering method. Has been done. According to the HIP sintering method, the inert gas (A
(r gas) is used as a pressure medium to cause a sintering reaction under the uniform action of a high pressurizing force, and it is possible to obtain a homogeneous and good dimensional precision sintered product having high density close to true density. HI
In the P sintering method, the raw material powder is vacuum-sealed with a capsule and HI
P treatment method and a method of producing a sintered body having a predetermined shape in advance by another forming and sintering method and performing HIP treatment without encapsulating the sintered body (capsule-free HIP method)
Capsule-free H that does not require stripping (capsule removal processing step by machining) after sintering when manufacturing a sintered product having a complicated shape.
The IP method is applied. In the capsule-free HIP method, the pressure medium (Ar gas) comes into direct contact with the surface of the object to be treated, so in the object having a large porosity, the pressure medium gas penetrates into the pores of the object to transmit effective pressure. Cannot be secured,
It is not possible to sufficiently achieve high density as the HIP processing effect. Therefore, in order to achieve sufficient densification by the capsule-free HIP process using the sintered body as the object to be processed, it is necessary that the sintered body has a relative density of about 90% or more. Has been done.
【０００３】[0003]
【発明が解決しようとする課題】上記カプセルフリーＨ
ＩＰ処理に供する焼結体は、代表的には、高圧力成形法
である冷間静水圧プレス成形法（ＣＩＰ成形法、成形圧
力：例えば１０００〜１５００ｋｇｆ／ｃｍ2 ）で成形
した粉末成形体に焼結処理（焼結温度：約１０００〜１
３５０℃）を施して得られる相対密度９０％以上の焼結
体が使用されている。しかるに、焼結原料粉末が、例え
ばＣｒ（融点：約１８６０℃）やＣｒ基合金（例えば９
０％Ｃｒ−１０％Ｆｅ合金の融点：約１８００℃）など
のような高融点金属の粉末である場合においては、上記
成形焼結により得られる焼結体の相対密度は、後記のよ
うに７０％を若干上廻る程度にすぎず、カプセルフリー
ＨＩＰ処理に必要な相対密度（約９０％以上）の焼結体
を得ることができない。その粉末成形体の焼結処理を、
例えば１６００℃を越えるような高温度で行えば、カプ
セルフリーＨＩＰ処理に供し得る焼結体に焼き上げるこ
とも不可能ではないが、設備上の制約や、メンテナン
ス、コスト等の点から、そのような高温焼結を工業的に
実施することは極めて困難である。本発明は、ＣｒやＣ
ｒ基合金等の高融点金属粉末を原料として、比較的低温
での焼結処理により、高密度を有する焼結体を得ること
ができ、また更に高密度化することを望む場合は、これ
をカプセルフリーＨＩＰ処理に付して真密度に近い焼結
製品に仕上げることができるようにしたものである。DISCLOSURE OF THE INVENTION Capsule-free H
The sintered body to be subjected to the IP treatment is typically a powder compact molded by a cold isostatic press molding method (CIP molding method, molding pressure: for example, 1000 to 1500 kgf / cm 2 ) which is a high pressure molding method. Sintering treatment (sintering temperature: about 1000 to 1
A sintered body having a relative density of 90% or more obtained by applying (350 ° C.) is used. However, the sintering raw material powder is, for example, Cr (melting point: about 1860 ° C.) or Cr-based alloy (for example, 9
In the case of a powder of a high melting point metal such as a 0% Cr-10% Fe alloy melting point: about 1800 ° C.), the relative density of the sintered body obtained by the above compaction sintering is 70% as described later. %, Which is slightly higher than%, and a sintered body having a relative density (about 90% or more) necessary for the capsule-free HIP treatment cannot be obtained. Sintering the powder compact,
For example, if it is carried out at a high temperature exceeding 1600 ° C., it is not impossible to bake into a sintered body that can be used for capsule-free HIP processing, but in terms of equipment restrictions, maintenance, cost, etc. It is extremely difficult to carry out high temperature sintering industrially. The present invention uses Cr and C
When a high melting point metal powder such as an r-based alloy is used as a raw material, a sintered body having a high density can be obtained by a sintering process at a relatively low temperature. Capsule-free HIP processing is performed so that a sintered product close to the true density can be finished.
【０００４】[0004]
【課題を解決するための手段および作用】本発明は、高
融点金属粉末を原料とする高緻密質焼結体の製造方法に
おいて、高融点金属に固溶して焼結温度を下げ焼結を促
進する元素を、高融点金属粉末に配合して粉末成形体を
成形し、焼結処理することを特徴としている。本発明方
法によれば、上記焼結体は、所望によりこれを更に高緻
密度化するためのカプセルフリーＨＩＰ処理が施され
る。The present invention provides a method for producing a highly dense sintered body using a refractory metal powder as a raw material. It is characterized in that the accelerating element is blended with the refractory metal powder to form a powder compact and the sintering treatment is performed. According to the method of the present invention, the above-mentioned sintered body is optionally subjected to a capsule-free HIP treatment for further increasing the density.
【０００５】以下、本発明について詳しく説明する。本
発明において母合金粉末に配合される第三元素は、母合
金に固溶、拡散して合金を形成し、母合金の融点を下
げ、焼結反応温度の降下、易焼結性をもたらす元素であ
る。母合金粉末に配合される上記第三元素は母合金の材
種に応じて選択される。母合金がＣｒまたはＣｒ基合金
（例えば、Ｃｒ−Ｆｅ合金）である場合のこれに配合さ
れる元素の好適な例としてＮｉが挙げられる。その配合
量は、数％以下（例えば、１〜５重量％）の少量で十分
であり、従つて母合金の材料特性に実質的な影響を与え
ずに、その配合効果として、粉末成形体を低温焼結によ
り、相対密度９０％以上の焼結体とすることができる。The present invention will be described in detail below. The third element to be mixed with the mother alloy powder in the present invention is an element that forms a solid solution with the mother alloy and diffuses to form an alloy, lowers the melting point of the mother alloy, lowers the sintering reaction temperature, and facilitates sinterability. Is. The above-mentioned third element to be mixed with the mother alloy powder is selected according to the material type of the mother alloy. When the mother alloy is Cr or a Cr-based alloy (for example, a Cr-Fe alloy), Ni is mentioned as a suitable example of the element to be mixed therein. A small amount of a few% or less (for example, 1 to 5% by weight) is sufficient for the compounding amount, and therefore, as a compounding effect of the powder compact, it does not substantially affect the material properties of the master alloy. By low temperature sintering, a sintered body having a relative density of 90% or more can be obtained.
【０００６】母合金粉末に対する第三元素の配合は、例
えば母合金粉末に第三元素の粉末を加えボールミルで混
練する方法、またはアトライタ、振動ミル等により母合
金と第三元素との機械的合金化を生じさせる高エネルギ
ーボールミル混練、あるいは無電解めつき法により母合
金粉末の粒子表面を第三元素のめつき膜で被覆する方法
等を適用することができる。The mixing of the third element with the mother alloy powder is carried out, for example, by adding the powder of the third element to the mother alloy powder and kneading with a ball mill, or a mechanical alloy of the mother alloy and the third element by an attritor or a vibration mill. A high-energy ball mill kneading that causes oxidization or a method of coating the particle surface of the mother alloy powder with a plating film of the third element by an electroless plating method or the like can be applied.
【０００７】第三元素が配合された母合金粉末の成形焼
結は、常法に従つて行えばよく、ＣＩＰ成形法により、
約１０００ｋｇｆ／ｃｍ2 以上の成形圧で粉末成形体
（好ましくは、相対密度 ６０％以上）を成形し、つい
でこれを焼結する。焼結処理は、例えば１２００〜１４
００℃の低温度域で行うことができ、その低温焼結処理
により、９０％以上の相対密度を有する焼結体を得るこ
とができる。The molding and sintering of the mother alloy powder containing the third element may be carried out according to a conventional method, for example, by the CIP molding method.
A powder compact (preferably a relative density of 60% or more) is compacted at a compacting pressure of about 1000 kgf / cm 2 or more, and then sintered. The sintering process is, for example, 1200 to 14
It can be carried out in a low temperature range of 00 ° C., and the low temperature sintering treatment makes it possible to obtain a sintered body having a relative density of 90% or more.
【０００８】上記焼結体は、これをカプセルフリーＨＩ
Ｐ処理に付して更に高密度化することができる。そのＨ
ＩＰ処理は常法に従つて行われ、例えば加圧力：約１０
００ｋｇｆ／ｃｍ2 以上、温度：約１２００〜１４００
℃の加熱加圧下に適当時間（例えば、２〜４Ｈｒ）保持
することにより、ほぼ真密度に等しい高緻密質の焼結品
に仕上げることができる。The above sintered body is a capsule-free HI.
Further densification can be achieved by applying P treatment. That H
IP treatment is carried out according to a conventional method, for example, a pressing force: about 10
00 kgf / cm 2 or more, temperature: about 1200 to 1400
By holding the material under heating and pressurizing at a temperature of [deg.] C. for an appropriate time (for example, 2 to 4 hours), it is possible to finish a highly dense sintered product having substantially the same true density.
【０００９】こうして得られる高緻密質の高融点金属焼
結品は、高度の材料特性を具備し、特に高強度・高靱性
等が要求される部材として有用であり、例えばＣｒまた
はＣｒ−Ｆｅ合金を母合金とする焼結品は、鋼材熱処理
炉の炉床部材（スキツドボタン、スキツドレール等）に
適用して卓抜した耐久性を示し、炉床メンテナンスの軽
減・操炉効率の向上に絶大な効果が得られる。The high-density, high-melting-point metal sintered product thus obtained has high material properties and is particularly useful as a member that requires high strength and high toughness. For example, a Cr or Cr--Fe alloy is used. Sintered products with a mother alloy as a master alloy have outstanding durability when applied to the hearth members of steel heat treatment furnaces (skid buttons, skid rails, etc.), and have a great effect on reducing hearth maintenance and improving furnace operation efficiency. can get.
【００１０】[0010]
〔Ｉ〕焼結原料粉末の調製 ９０％Ｃｒ−１０％Ｆｅ合金（融点：約１８００℃）の
粉砕粉末（平均粒径：１０μｍ以下）とＮｉを使用して
下記の粉末を調製。実施例１ Ｃｒ−Ｆｅ合金粉末にＮｉ粉末を添加し、ボールミルで
２４時間混練した粉末（Ｎｉ量：３％）。実施例２ 無電解めつきによりＣｒ−Ｆｅ合金粉末の粒子表面をＮ
ｉめつき膜で被覆した粉末（Ｎｉ量：３％）。実施例３ Ｃｒ−Ｆｅ合金粉末にＮｉ粉末を添加し、アトライター
で５時間混練して機械的合金化した粉末（Ｎｉ量：３
％）。比較例 Ｎｉの配合を省略したＣｒ−Ｆｅ合金粉末単味の粉末
（組成、粒度等は上記と同一）。 〔ＩＩ〕粉末成形体の成形 ＣＩＰ成形法により円柱形状の粉末成形体を成形。成形
圧力・時間：１５００ｋｇｆ／ｃｍ2 ・１ｍｉｎ。成形
体サイズ：φ３０×３０ ｌ（ｍｍ）。 〔ＩＩＩ〕焼結処理 焼結温度：１３５０℃，処理時間：４Ｈｒ、焼結雰囲
気：Ａｒ＋Ｎ2 ガス（大気圧） 〔ＩＶ〕カプセルフリーＨＩＰ処理 加圧力：１２００ｋｇｆ／ｃｍ2 ，焼結温度：１３５０
℃，処理時間：２Ｈｒ，圧力媒体：Ａｒガス。[I] Preparation of Sintering Raw Material Powder A pulverized powder (average particle diameter: 10 μm or less) of 90% Cr-10% Fe alloy (melting point: about 1800 ° C.) and Ni were used to prepare the following powder. Example 1 Ni powder was added to Cr—Fe alloy powder, and the powder was kneaded in a ball mill for 24 hours (Ni content: 3%). Example 2 The surface of particles of a Cr—Fe alloy powder was N-coated by electroless plating.
i Powder coated with a plating film (Ni content: 3%). Example 3 Ni powder was added to Cr—Fe alloy powder and mechanically alloyed by kneading for 5 hours with an attritor (Ni content: 3
%). Comparative Example A powder of Cr—Fe alloy powder alone without the addition of Ni (composition, particle size and the like are the same as above). [II] Molding of powder compact A cylindrical powder compact was molded by the CIP molding method. Molding pressure / time: 1500 kgf / cm 2 · 1 min. Molded body size: φ30 × 30 l (mm). [III] Sintering treatment Sintering temperature: 1350 ° C., treatment time: 4 Hr, sintering atmosphere: Ar + N 2 gas (atmospheric pressure) [IV] Capsule-free HIP treatment Pressure: 1200 kgf / cm 2 , sintering temperature: 1350
° C, processing time: 2 Hr, pressure medium: Ar gas.
【００１１】〔Ｖ〕結果 各実施例の粉末成形体、焼結体およびＨＩＰ処理後の焼
結体の密度（ｇ／ｃｍ3 ）を測定し、表１に示す結果を
得た。表中、カツコ内の数値は真密度比（％）を示して
いる。[V] Results The densities (g / cm 3 ) of the powder compacts, sintered compacts and sintered compacts after HIP treatment of the respective examples were measured, and the results shown in Table 1 were obtained. In the table, the value in Katsuko indicates the true density ratio (%).
【００１２】[0012]
【表１】 密 度 （ｇ／ｃｍ3 ） ＣＩＰ密度 ＳＩＮＴＥＲ密度 ＨＩＰ密度 実施例１ ４．７（６５％） ６．８（９４％） ７．２（１００％） 実施例２ ４．６（６４％） ６．８（９４％） ７．２（１００％） 実施例３ ４．６（６４％） ６．８（９４％） ７．２（１００％） 比較例 ４．４（６１％） ５．３（７４％） ５．４（７５％）Table 1 Density (g / cm 3 ) CIP density SINER density HIP density Example 1 4.7 (65%) 6.8 (94%) 7.2 (100%) Example 2 4.6 (64) %) 6.8 (94%) 7.2 (100%) Example 3 4.6 (64%) 6.8 (94%) 7.2 (100%) Comparative Example 4.4 (61%) 5 .3 (74%) 5.4 (75%)
【００１３】表１に示したように、ＣＩＰ成形による粉
末成形体の密度は、各実施例および比較例の間に実質的
な差はないが、その焼結体の密度は、比較例（Ｎｉ配合
なし）では真密度の約７４％にすぎないのに対し、Ｎｉ
を少量配合した実施例１〜３のそれは約９４％と著しく
高い密度を有している。また、比較例の焼結体の密度
は、ＨＩＰ処理を行つても、処理前のそれと変わらず、
ＨＩＰ処理効果としての高密度化は全く見られないのに
対し、実施例１〜３の各焼結体は、ＨＩＰ処理により更
に高密度化し、真密度とほぼ同等の密度に達している。As shown in Table 1, the densities of the powder compacts obtained by CIP molding are not substantially different between the examples and the comparative examples, but the densities of the sintered compacts are the same as those of the comparative examples (Ni (Without compounding) is only about 74% of true density, whereas Ni
It has a remarkably high density of about 94% in Examples 1 to 3 in which a small amount of is added. Further, the density of the sintered body of the comparative example is the same as that before the treatment even after the HIP treatment,
Although the densification as the HIP treatment effect is not observed at all, each of the sintered bodies of Examples 1 to 3 is further densified by the HIP treatment and reaches a density almost equal to the true density.
【００１４】[0014]
【発明の効果】本発明によれば、高融点金属粉末を原料
とする焼結品の製造において、焼結処理設備の負荷が大
きい高温焼結を必要とせず、工業的な実施に困難のない
比較的低温度域での焼結処理により、高緻密質の焼結品
を得ることができ、その焼結品はカプセルに封入するこ
となくＨＩＰ処理に付して更に高密度化し、真密度と同
等の密度を有する焼結品に仕上げることができる。本発
明は、高融点金属からなる高密度の焼結品をコスト的に
有利に製造することができ、またカプセルフリーＨＩＰ
処理により更に密度を高めることができるので、複雑形
状を有する高融点金属焼結品の製造法として特に有用で
ある。EFFECTS OF THE INVENTION According to the present invention, in the production of a sintered product using a refractory metal powder as a raw material, there is no need for high-temperature sintering that places a heavy load on the sintering treatment equipment, and there is no difficulty in industrial implementation. By performing the sintering process in a relatively low temperature range, a highly dense sintered product can be obtained, and the sintered product is subjected to HIP treatment without encapsulation to further increase the density, thereby obtaining a true density. It is possible to finish a sintered product having an equivalent density. INDUSTRIAL APPLICABILITY According to the present invention, a high-density sintered product made of a refractory metal can be manufactured at an advantageous cost, and a capsule-free HIP
Since the density can be further increased by the treatment, it is particularly useful as a method for producing a high melting point metal sintered product having a complicated shape.
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２２Ｃ 27/06 (72)発明者 西 隆 兵庫県尼崎市西向島町64番地 株式会社ク ボタ尼崎工場内 (72)発明者 蘭 裕幸 大阪府枚方市中宮大池１丁目１番１号 株 式会社クボタ枚方製造所内 (72)発明者 山本 裕史 兵庫県尼崎市浜１丁目１番１号 株式会社 クボタ技術開発研究所内Continuation of front page (51) Int.Cl. 5 Identification number Office reference number FI technical display location C22C 27/06 (72) Inventor Takashi Nishi Nishi 64, Nishimukaijima-cho, Amagasaki-shi, Hyogo KUBOTA Amagasaki factory (72) ) Inventor Hiroyuki Ran 1-1-1, Nakamiya Oike, Hirakata-shi, Osaka, Ltd. Kubota Hirakata Manufacturing Company (72) Inventor Hiroshi Yamamoto 1-1-1 Hama, Amagasaki-shi, Hyogo Kubota Technology Development Laboratory Co., Ltd.
Claims (3)
結体の製造方法において、高融点金属に固溶して焼結温
度を下げ焼結を促進する元素を、高融点金属粉末に配合
して粉末成形体を成形し、焼結処理することを特徴とす
る高緻密質の高融点金属焼結体の製造方法。1. A method for producing a highly dense sintered body using a refractory metal powder as a raw material, wherein an element which forms a solid solution with the refractory metal to lower the sintering temperature and promote sintering is added to the refractory metal powder. A method for producing a highly dense high-melting-point metal sintered body, which comprises blending to form a powder compact and sintering the mixture.
れた焼結体を、カプセルに封入することなく熱間静水圧
加圧焼結処理することを特徴とする高緻密質の高融点金
属焼結体の製造方法。2. A highly dense refractory metal, characterized in that the sintered body produced by the production method according to claim 1 is subjected to hot isostatic pressing sintering without being encapsulated. Manufacturing method of sintered body.
合金粉末であり、これに１〜５重量％のＮｉを配合する
ことを特徴とする請求項１または請求項２に記載の高緻
密質の高融点金属焼結体の製造方法。3. The refractory metal powder is Cr or Cr-Fe.
It is alloy powder, and 1 to 5 weight% of Ni is mix | blended with this, The manufacturing method of the highly dense refractory metal sintered compact of Claim 1 or Claim 2 characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026175A JPH06212202A (en) | 1993-01-20 | 1993-01-20 | Production of high-density sintered body of high melting metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026175A JPH06212202A (en) | 1993-01-20 | 1993-01-20 | Production of high-density sintered body of high melting metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06212202A true JPH06212202A (en) | 1994-08-02 |
Family
ID=12186204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5026175A Pending JPH06212202A (en) | 1993-01-20 | 1993-01-20 | Production of high-density sintered body of high melting metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06212202A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11634797B2 (en) | 2013-03-14 | 2023-04-25 | Massachusetts Institute Of Technology | Sintered nanocrystalline alloys |
| US11644288B2 (en) | 2015-09-17 | 2023-05-09 | Massachusetts Institute Of Technology | Nanocrystalline alloy penetrators |
-
1993
- 1993-01-20 JP JP5026175A patent/JPH06212202A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11634797B2 (en) | 2013-03-14 | 2023-04-25 | Massachusetts Institute Of Technology | Sintered nanocrystalline alloys |
| US11674205B2 (en) * | 2013-03-14 | 2023-06-13 | Massachusetts Institute Of Technology | Alloys comprising chromium and second metal material |
| US11644288B2 (en) | 2015-09-17 | 2023-05-09 | Massachusetts Institute Of Technology | Nanocrystalline alloy penetrators |
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