JP2951349B2 - Manufacturing method of powder pressed body using underwater shock wave - Google Patents
Manufacturing method of powder pressed body using underwater shock waveInfo
- Publication number
- JP2951349B2 JP2951349B2 JP2029531A JP2953190A JP2951349B2 JP 2951349 B2 JP2951349 B2 JP 2951349B2 JP 2029531 A JP2029531 A JP 2029531A JP 2953190 A JP2953190 A JP 2953190A JP 2951349 B2 JP2951349 B2 JP 2951349B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- explosive
- shock wave
- water tank
- manufacturing
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/001—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by explosive charges
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、水中衝撃波により、粉末衝撃固化により、
粉末圧搾体を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an underwater shock wave,
The present invention relates to a method for producing a pressed powder body.
［従来の技術］ 現在、航空宇宙分野を始めとする極限条件下において
使用する材料の耐熱性、耐食性の改善および高強度軽量
化を目的として、金属間化合物、ファインセラミック
ス、セラミックス／金属複合材さらに傾斜機能材の開発
が積極的に進められている。傾斜組成材における基本的
思想はセラミックスと金属との接合において両者の熱膨
張差により生ずる接合界面の熱応力を緩和させるため
に、セラミックス側よりセラミックス粉と金属粉との割
合を順次変え、組成を連続的に傾斜させることにより、
熱応力の緩和と密着した接合をうるものである。[Prior art] Currently, intermetallic compounds, fine ceramics, ceramic / metal composites, and the like are used to improve the heat resistance, corrosion resistance, and high strength and weight of materials used under extreme conditions such as the aerospace field. The development of functionally graded materials is being actively pursued. The basic idea of the graded composition material is to change the composition of the ceramic powder and the metal powder sequentially from the ceramic side in order to reduce the thermal stress at the bonding interface caused by the difference in thermal expansion between the ceramic and the metal. By inclining continuously,
It is intended to reduce the thermal stress and to achieve a close bonding.
これらの材料は通常の粉末冶金法により製造されるこ
とが多い。すなわち、成形−焼結の過程を経て製造さ
れ、焼結時においては焼結助材を加えるが、組成が変化
する場合には助材の選択が難しい。These materials are often manufactured by ordinary powder metallurgy. That is, it is manufactured through a process of molding and sintering, and a sintering aid is added at the time of sintering, but when the composition changes, it is difficult to select the aid.
一方、衝撃エネルギーを利用して粉末を固化する方法
が注目されており、これまで、平面衝撃波を用いるもの
と円筒衝撃波を用いるものがある。この方法は衝撃波の
干渉により、材料内に各種の割れを生じたり、Mach−st
emによる空洞を形成したりして、セラミックス等の難焼
結材の固化には、満足すべき圧搾体の製造は十分ではな
かった。On the other hand, a method of solidifying powder by using impact energy has been attracting attention, and there have been ones using a plane shock wave and those using a cylindrical shock wave. This method causes various cracks in the material due to shock wave interference,
The production of satisfactory pressed bodies was not sufficient for solidification of hard-to-sinter materials such as ceramics by forming cavities due to em.
［発明が解決しようとする課題］ 上記従来の粉末冶金法による製造はその工程が複雑
で、技術的にも解決すべき点が多い。また、爆薬の衝撃
エネルギーを用いる方法は欠陥のない良好な圧搾体をう
ることが難しく、必ずしも必要十分な製造法ではなかっ
た。[Problems to be Solved by the Invention] The above-mentioned conventional production by the powder metallurgy method has complicated steps, and there are many technical points to be solved. Also, the method using the impact energy of explosives is difficult to obtain a good pressed body without defects, and is not always a necessary and sufficient manufacturing method.
本発明の目的はセラミックスと金属の圧搾体の製造に
対し、超高圧の水中衝撃波の衝撃エネルギーを用い、簡
単な方法で欠陥のない良好な圧搾体の製造方法を提供す
るものである。An object of the present invention is to provide a simple and good defect-free manufacturing method using a shock energy of an underwater shock wave of an ultra-high pressure for manufacturing a pressed body of ceramics and metal.
［課題を解決するための手段］ 本発明は、上記課題を解決するために、種々検討した
ところ、超高圧の水中衝撃波を直接、粉末に伝播し、そ
の衝撃エネルギーにより、固化できることに注目して本
発明を完成した。[Means for Solving the Problems] In order to solve the above problems, the present invention has been studied in various ways, and has noticed that ultra-high pressure underwater shock waves can be directly propagated to powder and solidified by the impact energy. The present invention has been completed.
すなわち、本発明の構成は、衝撃固化法により、粉末
圧搾体を製造する方法であって、爆薬充填部、水槽部、
粉末充填部を積層し、爆薬充填部の一端と水槽部の間及
び水槽部と粉末充填部の一端の間を金属箔膜で仕切り、
爆薬と水及び水と粉末を各々前記金属箔膜を介して隣接
せしめ、爆薬充填部の爆薬を爆発させて発生させた爆発
エネルギーを水槽部に伝播させて超高圧の水中平面衝撃
波を発生させ、該衝撃波を粉末充填部に伝播して粉末を
圧搾固化させることを特徴とする粉末圧搾体の製造方法
である。That is, the configuration of the present invention is a method of manufacturing a powder compact by an impact solidification method, and includes an explosive charging unit, a water tank unit,
Laminate the powder filling part, partition between one end of the explosive charging part and the water tank part and between the water tank part and one end of the powder filling part with a metal foil film,
Explosives and water and water and powder are respectively adjacent to each other through the metal foil film, and explosive energy generated by exploding the explosive in the explosive charged portion is propagated to the water tank portion to generate an ultra-high pressure underwater plane shock wave, A method for producing a pressed powder body, characterized in that the shock wave is propagated to a powder filling section to compress and solidify the powder.
本方法の特色は、 （１）水中衝撃波の圧力は爆薬と水のウゴニオ関係によ
って決まるが、圧力は概略次式で示される、 Ｐ＝2940（kg/cm2）［（ρ／ρ０）7.25−１］ 上式より、水の密度変化に対する圧力の増加量が非常に
大きいため、爆薬量の調節により、容易に超高圧が得ら
れ、その際の温度は空気の場合に比べ、低温度に保持さ
れる。The features of this method are as follows: (1) The pressure of the underwater shock wave is determined by the relationship between the explosive and the water, but the pressure is roughly expressed by the following equation: P = 2940 (kg / cm 2 ) [(ρ / ρ 0 ) 7.25 -1] From the above formula, the amount of increase in pressure with respect to the change in water density is very large, so that an ultra-high pressure can be easily obtained by adjusting the amount of explosive, and the temperature at that time is lower than that of air. Will be retained.
（２）衝撃圧力の持続時間が長い。(2) The duration of the impact pressure is long.
（３）衝撃圧力が均一に負荷できる。(3) The impact pressure can be uniformly applied.
以上の特徴を有するため、Si3N4等のセラミックス粉
末も容易に衝撃固化でき、平面的に衝撃圧力が負荷され
るので、円筒衝撃法で生じたMach stemによる材料内部
の割れや中心部の空洞の形成を防ぐことができ、欠陥の
ない試料ができ、水中衝撃波の利用は衝撃固化に非常に
有効である。Due to the above features, ceramic powders such as Si 3 N 4 can be easily solidified by impact, and impact pressure is applied in a planar manner. The formation of cavities can be prevented, a defect-free sample can be obtained, and the use of underwater shock waves is very effective for impact solidification.
ここに、本発明の要旨とするところは、衝撃固化法に
より、セラミックスと金属との混合体や傾斜機能材を製
造する際に、爆発エネルギーにより超高圧の水中衝撃波
を発生させ、その衝撃エネルギーを粉体に伝播し、各種
粉末を欠陥なく固化させようとする方法である。Here, the gist of the present invention is that when a mixture of ceramics and metal or a functionally graded material is produced by an impact solidification method, an ultra-high pressure underwater shock wave is generated by explosion energy, and the impact energy is generated. This is a method of transmitting to powder and solidifying various powders without defects.
［作 用］ 次に添付図面を参照しながら本発明を説明する。[Operation] Next, the present invention will be described with reference to the accompanying drawings.
第１図は本発明の装置を説明する略式断面図である。
装置は鋼製の３つの部分すなわちＡ）爆薬充填部、Ｂ）
水槽部、Ｃ）粉末充填部より構成される。上部より、Ａ
−Ｃの部分を接着剤で接合する。衝撃固化の過程はまず
雷管１を起爆することにより、爆轟速度7000m/s程度の
爆薬２を爆発させ、発生する衝撃波を銅箔３を通して水
４に伝播する。つぎに発生した水中衝撃波を銅箔５を通
して、その衝撃エネルギーを粉末６に伝播する事によ
り、衝撃固化する。その際、粉末充填室内の空気は小穴
７を通して前もって脱気するか、衝撃エネルギー伝播時
に小穴７を通して脱気させる。FIG. 1 is a schematic sectional view illustrating the device of the present invention.
The device consists of three parts made of steel: A) explosive charge, B)
A water tank section and C) a powder filling section. From the top, A
Join the portion -C with an adhesive. In the process of impact solidification, first, the detonator 1 is detonated to explode the explosive 2 having a detonation speed of about 7000 m / s, and the generated shock wave is transmitted to the water 4 through the copper foil 3. Next, the generated underwater shock wave passes through the copper foil 5 and the shock energy is propagated to the powder 6, thereby solidifying the shock. At this time, the air in the powder filling chamber is preliminarily degassed through the small holes 7 or degassed through the small holes 7 when the impact energy is propagated.
粉体に負荷するエネルギーの大きさは爆薬量により調
整する。The amount of energy applied to the powder is adjusted by the amount of explosive.
試料は放電加工か旋盤加工により、切り出す。 The sample is cut out by electric discharge machining or lathe machining.
以下実施例によって、本発明を具体的に説明する。 Hereinafter, the present invention will be specifically described with reference to examples.
［実施例］ 本発明法、即ち第１図に示した方法と、円筒衝撃波を
利用した従来法（以下比較法という）について、第１表
に示すように、金属間化合物粉末、セラミックス粉末、
混合粉末および傾斜組成粉末を用い、衝撃圧搾体を作製
した。[Examples] As shown in Table 1, the method of the present invention, that is, the method shown in FIG. 1 and the conventional method using a cylindrical shock wave (hereinafter referred to as a comparative method) are shown in Table 1 below.
Using the mixed powder and the gradient composition powder, an impact pressed body was produced.
本発明法は超高圧の水中衝撃波を粉末に平面的に伝播
させるため、比較法に比べ、全ての場合について中心孔
も発生せず圧縮相対密度がほぼ100％近くなった。In the method of the present invention, underwater shock waves of ultra-high pressure were propagated in a plane to the powder, so that in all cases, no center hole was generated and the relative compressive density was almost 100% as compared with the comparative method.
一方、比較法では圧縮相対密度を高くするため、爆薬
量を増加すると、中心孔が発生し、薬量を減ずると、相
対密度が小さくなるという欠点があるため、金属間化合
物粉末は固化しうるが、圧縮相対密度は高々70％であ
る。またセラミックスを含む粉末は固化が困難である。On the other hand, in the comparative method, since the compressed relative density is increased, when the amount of explosive is increased, a central hole is generated, and when the amount of the explosive is reduced, there is a disadvantage that the relative density is reduced, so that the intermetallic compound powder can be solidified. However, the compressed relative density is at most 70%. Powder containing ceramics is difficult to solidify.
［発明の効果］ 以上述べたように、本発明方法による各種粉末の衝撃
固化方法によれば、セラミックス粉末等の難焼結性粉末
も焼結助剤なしに、純粋状態で、所定の形状の型に粉末
を充填する事により、各種形状の圧搾体を作製でき、良
質な圧搾体をうるに大きな効果がある。 [Effects of the Invention] As described above, according to the impact solidification method for various powders according to the method of the present invention, even a hardly sinterable powder such as a ceramic powder can be formed in a pure state without a sintering aid in a predetermined shape. By filling the mold with powder, pressed bodies of various shapes can be produced, which has a great effect on obtaining a high-quality pressed body.
第１図は本発明を実施するための装置の一例である。 Ａ……爆薬充填部、Ｂ……水槽部、Ｃ……粉末充填部、
１……雷管、２……爆薬、３……金属箔、４……水、５
……金属箔、６……粉末、７……小穴。FIG. 1 shows an example of an apparatus for carrying out the present invention. A: explosive charging section, B: water tank section, C: powder filling section,
1 detonator, 2 explosive, 3 metal foil, 4 water, 5
... metal foil, 6 ... powder, 7 ... small holes.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−243205（ＪＰ，Ａ) 特公 昭59−32174（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) B30B 11/00,11/02 B30B 5/00 B28B 1/00 B22F 3/08 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-243205 (JP, A) JP-B-59-32174 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) B30B 11 / 00,11 / 02 B30B 5/00 B28B 1/00 B22F 3/08
Claims (1)
方法であって、爆薬充填部、水槽部、粉末充填部を積層
し、爆薬充填部の一端と水槽部の間及び水槽部と粉末充
填部の一端の間を金属箔膜で仕切り、爆薬と水及び水と
粉末を各々前記金属箔膜を介して隣接せしめ、爆薬充填
部の爆薬を爆発させて発生させた爆発エネルギーを水槽
部に伝播させて超高圧の水中平面衝撃波を発生させ、該
衝撃波を粉末充填部に伝播して粉末を圧搾固化させるこ
とを特徴とする粉末圧搾体の製造方法。1. A method for producing a pressed powder body by an impact solidification method, comprising: laminating an explosive charging section, a water tank section, and a powder charging section, between one end of the explosive charging section and the water tank section, and between the water tank section and the powder tank. One end of the filling portion is partitioned by a metal foil film, and the explosive and water and water and powder are made adjacent to each other via the metal foil film, and the explosive energy generated by exploding the explosive in the explosive filling portion is generated in the water tank portion. A method for producing a pressed powder body, comprising: generating an ultra-high pressure underwater shock wave by propagating the shock wave; and propagating the shock wave to a powder filling portion to compress and solidify the powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2029531A JP2951349B2 (en) | 1990-02-13 | 1990-02-13 | Manufacturing method of powder pressed body using underwater shock wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2029531A JP2951349B2 (en) | 1990-02-13 | 1990-02-13 | Manufacturing method of powder pressed body using underwater shock wave |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03234398A JPH03234398A (en) | 1991-10-18 |
| JP2951349B2 true JP2951349B2 (en) | 1999-09-20 |
Family
ID=12278695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2029531A Expired - Fee Related JP2951349B2 (en) | 1990-02-13 | 1990-02-13 | Manufacturing method of powder pressed body using underwater shock wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2951349B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009057742A1 (en) | 2007-11-02 | 2009-05-07 | Asahi Kasei Kabushiki Kaisha | Composite magnetic material for magnet and method for manufacturing such material |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112976A (en) * | 2001-09-28 | 2003-04-18 | National Institute Of Advanced Industrial & Technology | Structure and method for manufacturing the same, particle for forming structure and method for manufacturing the same |
| JP5290540B2 (en) * | 2007-06-18 | 2013-09-18 | 旭化成ケミカルズ株式会社 | Explosive processing method |
| JP2011068551A (en) * | 2009-08-22 | 2011-04-07 | Kumamoto Univ | Method for manufacturing inorganic-compound bulk body and inorganic-compound bulk body |
| CN103862696A (en) * | 2014-03-19 | 2014-06-18 | 中国船舶重工集团公司第七○二研究所 | Conical underground explosion shock wave compaction device |
| CN103862697A (en) * | 2014-03-19 | 2014-06-18 | 中国船舶重工集团公司第七○二研究所 | Cylindrical underground explosion shock wave compaction device |
-
1990
- 1990-02-13 JP JP2029531A patent/JP2951349B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009057742A1 (en) | 2007-11-02 | 2009-05-07 | Asahi Kasei Kabushiki Kaisha | Composite magnetic material for magnet and method for manufacturing such material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03234398A (en) | 1991-10-18 |
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Legal Events
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| LAPS | Cancellation because of no payment of annual fees |