JPH0717929B2 - Method for hot isostatic pressing of powder raw material and container for hot isostatic pressing - Google Patents
Method for hot isostatic pressing of powder raw material and container for hot isostatic pressingInfo
- Publication number
- JPH0717929B2 JPH0717929B2 JP62310335A JP31033587A JPH0717929B2 JP H0717929 B2 JPH0717929 B2 JP H0717929B2 JP 62310335 A JP62310335 A JP 62310335A JP 31033587 A JP31033587 A JP 31033587A JP H0717929 B2 JPH0717929 B2 JP H0717929B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- raw material
- cavity
- hot isostatic
- isostatic pressing
- 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
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、粉末原料を熱間静水圧加圧することにより、
所定形状に形成する方法と、その方法の実施に用いる容
器に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is characterized by hot isostatic pressing of a powder raw material,
The present invention relates to a method of forming a predetermined shape and a container used for carrying out the method.
（従来の技術） 金属や非金属の原料粉末を成形容器に充填すると共に熱
間静水圧加圧することで、その成形容器の形状に対応し
た形状に成形する技術は従来より一般に普及している。(Prior Art) A technique of forming a shape corresponding to the shape of a molding container by filling a molding container with metal or non-metal raw material powder and performing hot isostatic pressing has been widely used.
（発明が解決しようとする問題点） 従来の技術では、成形容器内への原料粉末の充填率の不
均一、成形体各部での肉厚の不均一により、高温域で不
均一な収縮や変形が生じていた。また、成形容器そのも
のの収縮があった。そのため、原料粉末を希望通りの形
状に成形することが困難であった。そのため、最終製品
形状とするまでの機械加工等の余分な工程が増加すると
いう問題があった。(Problems to be Solved by the Invention) In the conventional technology, uneven shrinkage or deformation in a high temperature range is caused due to uneven filling rate of raw material powder in a molding container and uneven thickness of each part of the molded body. Was occurring. In addition, the molding container itself contracted. Therefore, it was difficult to shape the raw material powder into a desired shape. Therefore, there is a problem that extra steps such as machining to form the final product shape increase.
本発明は上記問題点を解決することを目的とする。The present invention aims to solve the above problems.
（問題点を解決するための手段） 本発明方法が、従来技術の問題点を解決するために特徴
とするところは、目的製品形状を呈するキャビティ５が
外面に開口するように形成された成形容器２の開口部を
補助容器３で閉塞し、前記キャビティ５及び補助容器３
内に原料粉末８を気密に充填し、その後、この成形容器
２及び補助容器３をともに熱間静水圧加圧下にさらして
その内部の前記原料粉末８を加圧焼結するに当たり、前
記キャビティ５の形状寸法を保持しながら前記補助容器
３を変形させることによってその補助容器３内の原料粉
末８を前記キャビティ５側へ補給する点にある。(Means for Solving Problems) A feature of the method of the present invention for solving the problems of the prior art is that a molding container formed so that a cavity 5 having a target product shape is opened to the outer surface. 2 is closed by an auxiliary container 3, and the cavity 5 and the auxiliary container 3 are closed.
The raw material powder 8 is filled in the inside airtightly, and then the molding container 2 and the auxiliary container 3 are both exposed to hot isostatic pressing to press-sinter the raw material powder 8 therein, and the cavity 5 is By deforming the auxiliary container 3 while maintaining the shape and size, the raw material powder 8 in the auxiliary container 3 is replenished to the cavity 5 side.
上記方法を実施するための熱間静水圧加圧成形用容器の
特徴とするところは、目的製品形状を呈するキャビティ
５が外面に開口するように形成された成形容器２と、こ
の成形容器２の開口部を閉塞する補助容器３とを備え、 前記成形容器２は、熱間静水圧加圧をうけても原料粉末
８が充填された前記キャビティ５の形状寸法を保持でき
る部材で形成され、 前記補助容器３は、前記キャビティ５及び補助容器３内
に原料粉末８を気密に充填した状態で前記成形容器２及
び補助容器３を熱間静水圧加圧下にさらしたときに前記
キャビティ５側に変形する薄肉部材よりなる点にある。A feature of the hot isostatic pressing container for carrying out the above method is that the molding container 2 is formed so that the cavity 5 having the target product shape is opened to the outer surface, and the molding container 2 An auxiliary container 3 for closing the opening, and the molding container 2 is formed of a member capable of maintaining the shape and size of the cavity 5 filled with the raw material powder 8 even when subjected to hot isostatic pressing. The auxiliary container 3 is deformed to the cavity 5 side when the molding container 2 and the auxiliary container 3 are exposed to hot isostatic pressing while the raw material powder 8 is airtightly filled in the cavity 5 and the auxiliary container 3. It consists of a thin member.
（作用） 本発明では、成形容器２及び補助容器３はともに熱間静
水圧加圧下にさらされ、その内部の原料粉末８が加圧焼
結される。(Operation) In the present invention, both the molding container 2 and the auxiliary container 3 are exposed to hot isostatic pressing, and the raw material powder 8 therein is pressure-sintered.
このとき、キャビティ５の形状寸法を保持しつつ補助容
器３が変形され、この変形によって補助容器３内の原料
粉末８がキャビティ５側へ補給されるので、原料粉末８
は一定の形状寸法に保たれるキャビティ５内で加圧され
ることになり、所望形状に極めて近い成形品が得られ
る。At this time, the auxiliary container 3 is deformed while maintaining the shape and size of the cavity 5, and the material powder 8 in the auxiliary container 3 is replenished to the cavity 5 side by this deformation.
Is pressurized in the cavity 5 which is kept in a constant shape and dimension, and a molded product having a shape very close to the desired shape can be obtained.
（実施例） 以下、本発明の実施例を図面に基づき説明する。(Example) Hereinafter, the Example of this invention is described based on drawing.
第１図は、原料粉末８を充填した熱間静水圧加圧成形用
容器１を示し、成形容器２と補助容器３とを備える。FIG. 1 shows a container 1 for hot isostatic pressing that is filled with a raw material powder 8 and includes a molding container 2 and an auxiliary container 3.
成形容器２はJIS−SF40材製で、直径Ｄ＝200mm、高さｔ
＝50mmの第一部材2aと、直接Ｄ＝200mm、高さＬ＝200mm
の第二部材2bとを溶接４したもので、第二部材2bの中心
に、直径ｄ＝10mm、高さｌ＝150mmの所望成形品寸法の
キャビティ５が形成されている。Molding container 2 is made of JIS-SF40 material, diameter D = 200mm, height t
= 50 mm first member 2a, direct D = 200 mm, height L = 200 mm
The second member 2b is welded to the second member 2b, and a cavity 5 having a diameter of d = 10 mm and a height of l = 150 mm and having a desired molded product size is formed at the center of the second member 2b.
すなわち、この成形容器２は、目的製品形状を呈するキ
ャビティ５が上面に開口するように形成され、熱間静水
圧加圧をうけても原料粉末８が充填された前記キャビテ
ィ５の形状寸法を保持できる部材で形成されている。That is, the molding container 2 is formed so that the cavity 5 having the shape of the target product opens on the upper surface, and retains the shape and size of the cavity 5 filled with the raw material powder 8 even when subjected to hot isostatic pressing. It is formed of a member that can.
補助容器３は、成形容器２の上端に連設されたもので、
厚さ3.2mmの薄鋼板で半球殻形に成形され、成形容器２
の上面に溶着されている。そして、補助容器３と成形容
器２のキャビティ５とを連通するためのランナー６が成
形容器２に成形されている。The auxiliary container 3 is connected to the upper end of the molding container 2,
Formed into a hemispherical shell shape with a thin steel plate with a thickness of 3.2 mm, forming container 2
Is welded to the upper surface of. Then, a runner 6 for communicating the auxiliary container 3 and the cavity 5 of the molding container 2 is molded in the molding container 2.
すなわち、この補助容器３は、後述のようにキャビティ
５及び補助容器３内に原料粉末８を気密に充填した状態
で成形容器２及び補助容器３を熱間静水圧加圧下にさら
したときに、この補助容器３のみが前記キャビティ５側
に変形する薄肉部材によって構成されている。That is, when the molding container 2 and the auxiliary container 3 are exposed to hot isostatic pressure while the raw material powder 8 is airtightly filled in the cavity 5 and the auxiliary container 3 as described later, Only the auxiliary container 3 is composed of a thin member that deforms toward the cavity 5 side.
また、補助容器３は、前記成形容器２の開口部が形成さ
れている上面に溶着されていて、その内周面上の任意点
における法線方向がキャビティ５側へ向く成分を有する
ドーム状に形成されている。Further, the auxiliary container 3 is welded to the upper surface of the molding container 2 where the opening is formed, and has a dome shape having a component in which a normal line direction at an arbitrary point on the inner peripheral surface thereof is directed to the cavity 5 side. Has been formed.
従って、熱間静水圧加圧によって当該補助容器３が変形
しても、成形容器２との溶着部が容器中央側へ変位する
ことがなく、これによってその溶着部が壊れて内部にガ
スが侵入するのを防止している。Therefore, even if the auxiliary container 3 is deformed by hot isostatic pressing, the welded portion with the molding container 2 is not displaced toward the center of the container, whereby the welded portion is broken and gas enters the inside. To prevent it.
そして、補助容器３の上端には脱気管７が連設され、こ
の脱気管７から真空中にて金属粉末を成形容器２のキャ
ビティ５、ランナー６及び補助容器３に充填し、その後
脱気管７を閉塞している。A deaeration pipe 7 is connected to the upper end of the auxiliary container 3, and the metal powder is filled in the cavity 5 of the molding container 2, the runner 6 and the auxiliary container 3 in a vacuum from the deaeration pipe 7, and then the deaeration pipe 7 is removed. Is blocked.
ここで、補助容器３の容積は、成形容器２のキャビティ
５とランナー６内の原料粉末８だけでは収縮によって所
望真密度の成形品寸法とできない場合に、その不足分を
補うに足る原料粉末を充填できる大きさとする。Here, the volume of the auxiliary container 3 is sufficient to compensate for the deficiency in the case where the raw material powder 8 in the molding container 2 and the runner 6 alone cannot achieve the desired true density molded product dimension due to shrinkage. The size should be large enough to fill.
そして、上記原料粉末を充填した成形容器２と補助容器
３とを、1200℃、1000kg/mm2で熱間静水圧加圧した。こ
の場合の成形容器２と補助容器３の経時変化は第２図乃
至第４図に示すものであり、補助容器３は大きく収縮し
たが、成形容器２は殆ど収縮しなかった。また、原料粉
末８は補助容器３、ランナー６、キャビティ５内のもの
の順に軟化していく。これにより、補助容器３内の原料
粉末８が成形容器２内に移動するのがわかる。しかる後
に徐冷して成形容器２を機械加工して成形品を取り出し
て測定すると、直径Ｄ＝99.9mm、高さｌ＝149.7mmであ
り、所望形状に極めて近い成形品を得ることができた。Then, the molding container 2 filled with the raw material powder and the auxiliary container 3 were subjected to hot isostatic pressing at 1200 ° C. and 1000 kg / mm 2 . The changes with time of the molding container 2 and the auxiliary container 3 in this case are shown in FIGS. 2 to 4, and the auxiliary container 3 contracted greatly, but the molding container 2 hardly contracted. The raw material powder 8 is softened in the order of the auxiliary container 3, the runner 6, and the inside of the cavity 5. As a result, it can be seen that the raw material powder 8 in the auxiliary container 3 moves into the molding container 2. Then, after slowly cooling, the molded container 2 was machined, and the molded product was taken out and measured, and the diameter D was 99.9 mm and the height l was 149.7 mm, and a molded product very close to the desired shape could be obtained. .
第５図は異なった実施例に係る熱間静水圧加圧成形容器
１であり、上記実施例との相違は、補助容器３が前記キ
ャビティ５及びランナー６の内面に沿う形状に形成され
ており、この補助容器３が断熱材９よりなる成形容器２
によって周囲を覆われている点にある。FIG. 5 shows a hot isostatic pressing container 1 according to a different embodiment. The difference from the above embodiment is that the auxiliary container 3 is formed in a shape along the inner surfaces of the cavity 5 and the runner 6. , The auxiliary container 3 is a molded container 2 made of a heat insulating material 9.
The point is that it is covered by.
この場合、補助容器３の上端は上方にやや膨らんだ蓋体
で閉塞され、この蓋体の中央に脱気管７が設けられてい
る。In this case, the upper end of the auxiliary container 3 is closed by a lid that bulges slightly upward, and a deaeration pipe 7 is provided in the center of the lid.
従って、容器１は上方からのみ加熱され、補助容器３の
上面が下向に圧下加熱されて収縮し、原料粉末８は補助
容器３からキャビティ５内のものと順次軟化され、補助
容器３内の原料粉末８が成形容器２に移動する。Therefore, the container 1 is heated only from above, the upper surface of the auxiliary container 3 is downwardly heated and contracted, and the raw material powder 8 is gradually softened from that in the cavity 5 from the auxiliary container 3 and the auxiliary container 3 The raw material powder 8 moves to the molding container 2.
なお、金属粉末を原料とする場合は、成形容器２の内面
にセラミックス形の離形材を塗布すれば、成形体と容器
との拡散接合を防止でき、成形体を成形容器２から容易
に取り出すことができる。When a metal powder is used as a raw material, if a ceramic mold release material is applied to the inner surface of the molding container 2, diffusion bonding between the molding and the container can be prevented, and the molding can be easily taken out of the molding container 2. be able to.
（発明の効果） 本発明によれば、成形容器２及び補助容器３をともに熱
間静水圧加圧下にさらしてその内部の原料粉末８を加圧
焼結するに当たり、成形容器２内のキャビティ５の形状
寸法を保持しながら補助容器３を変形させることによっ
てその補助容器３内の原料粉末８をキャビティ５側へ補
給するため、所望形状に極めて近い成形品を得ることが
でき、その後の機械加工等の工程の増加を防止できる。(Effect of the Invention) According to the present invention, when the molding container 2 and the auxiliary container 3 are both exposed to hot isostatic pressing to press-sinter the raw material powder 8 therein, the cavity 5 in the molding container 2 is By deforming the auxiliary container 3 while maintaining the shape and dimensions of the auxiliary container 3, the raw material powder 8 in the auxiliary container 3 is replenished to the cavity 5 side, so that a molded product having a shape very close to the desired shape can be obtained, and the subsequent machining is performed. It is possible to prevent an increase in the number of steps.
図面は本発明の実施例に係り、第１図は熱間静水圧加圧
成形用容器の断面図、第２図乃至第４図は同容器の熱間
静水圧加圧下での変形状態を順次示す図、第５図は異な
った実施例に係る同容器の断面図である。 ２…成形容器、３…補助容器、５…キャビティ、８…原
料粉末、９…断熱材。The drawings relate to the embodiment of the present invention. Fig. 1 is a cross-sectional view of a container for hot isostatic pressing, and Figs. 2 to 4 are sequential deformation states of the container under hot isostatic pressing. FIG. 5 and FIG. 5 are sectional views of the same container according to different embodiments. 2 ... Molding container, 3 ... Auxiliary container, 5 ... Cavity, 8 ... Raw material powder, 9 ... Heat insulating material.
Claims (4)
外面に開口するように形成された成形容器（２）の開口
部を補助容器（３）で閉塞し、前記キャビティ（５）及
び補助容器（３）内に原料粉末（８）を気密に充填し、
その後、この成形容器（２）及び補助容器（３）をとも
に熱間静水圧加圧下にさらしてその内部の前記原料粉末
（８）を加圧焼結するに当たり、前記キャビティ（５）
の形状寸法を保持しながら前記補助容器（３）を変形さ
せることによってその補助容器（３）内の原料粉末
（８）を前記キャビティ（５）側へ補給することを特徴
とする粉末原料の熱間静水圧加圧成形方法。1. A molding container (2) having a cavity (5) having the shape of a target product formed on the outer surface of the molding container (2) is closed with an auxiliary container (3) to form the cavity (5) and the auxiliary container. The raw material powder (8) is airtightly filled in (3),
After that, both the molding container (2) and the auxiliary container (3) are exposed to hot isostatic pressing to press-sinter the raw material powder (8) therein, the cavity (5)
The heat of the powder raw material, characterized in that the raw material powder (8) in the auxiliary container (3) is replenished to the cavity (5) side by deforming the auxiliary container (3) while maintaining the shape and dimensions of Isostatic pressing method.
外面に開口するように形成された成形容器（２）と、こ
の成形容器（２）の開口部を閉塞する補助容器（３）と
を備え、 前記成形容器（２）は、熱間静水圧加圧をうけても原料
粉末（８）が充填された前記キャビティ（５）の形状寸
法を保持できる部材で形成され、 前記補助容器（３）は、前記キャビティ（５）及び補助
容器（３）内に原料粉末（８）を気密に充填した状態で
前記成形容器（２）及び補助容器（３）を熱間静水圧加
圧下にさらしたときに前記キャビティ（５）側に変形す
る薄肉部材よりなることを特徴とする粉末原料の熱間静
水圧加圧成形用容器。2. A molding container (2) having a cavity (5) having the shape of a target product formed so as to open to the outer surface, and an auxiliary container (3) for closing the opening of the molding container (2). The molding container (2) is formed of a member capable of maintaining the shape and size of the cavity (5) filled with the raw material powder (8) even when subjected to hot isostatic pressing, and the auxiliary container (3) ), The molding container (2) and the auxiliary container (3) were exposed to hot isostatic pressure while the raw material powder (8) was airtightly filled in the cavity (5) and the auxiliary container (3). A container for hot isostatic pressing of a powder raw material, characterized by comprising a thin member that sometimes deforms toward the cavity (5) side.
とを特徴とする特許請求の範囲第２項に記載の粉末原料
の熱間静水圧加圧成形用容器。3. A container for hot isostatic pressing of a powder raw material according to claim 2, wherein the molding container (2) is made of a heat insulating material (9).
部がある面に溶着され、かつ内周面上の任意点における
法線方向がキャビティ（５）側へ向く成分を有するドー
ム状に形成されていることを特徴とする特許請求の範囲
第２項に記載の粉末原料の熱間静水圧加圧成形用容器。4. The auxiliary container (3) has a component which is welded to the surface of the molding container (2) having an opening and in which the normal direction at an arbitrary point on the inner peripheral surface is directed to the cavity (5) side. The container for hot isostatic pressing of the powder raw material according to claim 2, wherein the container is formed in a dome shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62310335A JPH0717929B2 (en) | 1987-12-07 | 1987-12-07 | Method for hot isostatic pressing of powder raw material and container for hot isostatic pressing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62310335A JPH0717929B2 (en) | 1987-12-07 | 1987-12-07 | Method for hot isostatic pressing of powder raw material and container for hot isostatic pressing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01149904A JPH01149904A (en) | 1989-06-13 |
| JPH0717929B2 true JPH0717929B2 (en) | 1995-03-01 |
Family
ID=18003997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62310335A Expired - Lifetime JPH0717929B2 (en) | 1987-12-07 | 1987-12-07 | Method for hot isostatic pressing of powder raw material and container for hot isostatic pressing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717929B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2950264B2 (en) * | 1996-12-06 | 1999-09-20 | 住友電気工業株式会社 | Manufacturing method of optical fiber ribbon |
| FR2996474B1 (en) * | 2012-10-05 | 2014-12-12 | Snecma | METHOD FOR THE INTEGRATION OF ABRADABLE MATERIAL IN ISOSTATIC COMPRESSION HOUSING |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE411854B (en) * | 1976-12-01 | 1980-02-11 | Asea Ab | METHOD OF ISOSTATIC HEAT COMPRESSION OF A BODY OF A POWDER IN A GASTE COAT AND WRAP FOR IMPLEMENTATION OF THE PROCEDURE |
-
1987
- 1987-12-07 JP JP62310335A patent/JPH0717929B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01149904A (en) | 1989-06-13 |
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