JPS6395153A - Dice for forming powder - Google Patents
Dice for forming powderInfo
- Publication number
- JPS6395153A JPS6395153A JP61240016A JP24001686A JPS6395153A JP S6395153 A JPS6395153 A JP S6395153A JP 61240016 A JP61240016 A JP 61240016A JP 24001686 A JP24001686 A JP 24001686A JP S6395153 A JPS6395153 A JP S6395153A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- die
- zro
- dice
- molding
- 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.)
- Granted
Links
- 239000000843 powder Substances 0.000 title claims description 25
- 239000000919 ceramic Substances 0.000 claims description 11
- 238000005056 compaction Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、粉末冶金の分野において金属その他の粉末を
種々形状に成形する粉末成形用ダイスに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a powder compacting die for compacting metal and other powders into various shapes in the field of powder metallurgy.
従来金属粉末等の成形用ダイスには超硬合金が用いられ
ていた。Conventionally, cemented carbide has been used for molding dies for metal powder, etc.
しかしながら従来の超硬ダイスではプレス成形時にダイ
ス内周面に被成形物である金属粉末等が付着し、ここを
起点として剥離が進行しダイス摩耗に到ってしまうとい
う問題点を有していた。ここで、粉末がダイスに付着す
る原因は、超硬には一般的に１０％前後のＣｏが含有さ
れており、これが粉末の金属と成形時に凝着をおこすた
めと考えられる。However, conventional carbide dies have the problem that metal powder, etc. of the molded object adheres to the inner peripheral surface of the die during press molding, and peeling progresses from there, leading to die wear. . Here, the reason why the powder adheres to the die is thought to be that carbide generally contains around 10% Co, which causes adhesion with the powder metal during molding.
本発明は以上の問題点に対し、被成形粉末と凝着を生ず
ることがなく長寿命を有する粉末成形用ダイスの提供を
目的とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to provide a powder molding die that does not cause adhesion to the powder to be molded and has a long life.
本発明は、ＺｒＯ，系セラミックスからなることを特徴
とする粉末成形用ダイスである。The present invention is a powder compacting die characterized by being made of ZrO-based ceramics.
本発明ダイスを構成するＺｒＯ□系セラミックスは金属
との化学的結合が起こりにくいため、従来の超硬ダイス
のように被成形粉末との凝着を防止することができる。Since the ZrO□-based ceramics constituting the die of the present invention is less likely to chemically bond with metal, it is possible to prevent adhesion with powder to be molded, unlike conventional cemented carbide dies.
本発明にかかるＺｒＯｚ系セラミックスとしては、Ｙ２
Ｏ，ヲ１〜５ｍｏ１％含有するＺｒ０ｔセラミックス、
又はＹ２Ｏ，を１〜５ＩＩＩＯ１％含有するＺｒ０ｚ
４０〜９０ｗｔ％、残部Ａ Ｉｔ ｚＯｓからなるＺｒ
０ｇ系セラミックスが望ましい。特に強度、硬度の点か
らＡ１２０３２０〜４０ｗｔ％、残部Ｙ２０．を約３ｍ
ｏｌ含有するＺｒＯ，からなるＺｒＯ□系セラミックス
であって、原料粉としてＺｒＯ，−Ｙ、Ｏ，−＾２□０
．の三元共沈粉を用い、熱間静水圧プレス処理を施した
ものが望ましい。ここで、ＺｒＯ□に含有されるＹ２Ｏ
３の量は、１ｍｏ１％未満では単斜晶、また５ｍｏ１％
を越えると立方晶が増加するため強靭化に必要な正方晶
の割合が低下する。またＡ ｌ ｔｃｈ量は１０−ｔ％
未満では強度の向上に十分な効果がなく、また６０ｗｔ
％を越えると硬度は向上するが、逆に抗折強度が上昇す
る。The ZrOz ceramics according to the present invention include Y2
Zr0t ceramics containing 1 to 5 mo1% of O,wo;
or Zr0z containing 1% to 5IIIO of Y2O,
Zr consisting of 40 to 90 wt%, the balance A It zOs
0g ceramics are preferable. Especially from the point of strength and hardness, A120320~40wt%, balance Y20. about 3m
ZrO□-based ceramics consisting of ZrO containing ol, ZrO, -Y, O, -^2□0 as raw material powder.
．． It is preferable to use a ternary co-precipitated powder of 1 and subjected to hot isostatic pressing. Here, Y2O contained in ZrO□
If the amount of 3 is less than 1mol1%, it becomes monoclinic, and 5mol%
If it exceeds , the proportion of tetragonal crystals required for toughening decreases because cubic crystals increase. Also, the amount of Al tch is 10-t%
If it is less than 60wt, there is no sufficient effect on improving the strength, and
%, the hardness improves, but conversely the bending strength increases.
以下本発明を実施例に基づき説明する。 The present invention will be explained below based on examples.
Ａｌｔｏｓを２０−ｔ％含有する市販のＺｒＯ２粉末（
Ｙ２Ｏ３は、Ｚｒ０ｚに対し３ｍｏ１％含有）を、ラバ
ープレスで３ ｔｏｎ／−の圧力で圧粉した後、所定の
形状に加工し、１４００℃で大気中で焼結した。さらに
、この焼結体に、１４５０℃、１１０００ａｔの条件で
旧Ｐを適用し緻密化した。そして、第１図の様に仕上げ
加工し、ダイスとした。また、従来から用いられてきた
超硬（材質： Ｋ−３０）を比較材とした。Commercially available ZrO2 powder containing 20-t% Altos (
Y2O3 (containing 3 mo1% with respect to Zr0z) was pressed into powder using a rubber press at a pressure of 3 tons/-, processed into a predetermined shape, and sintered at 1400° C. in the atmosphere. Further, this sintered body was densified by applying old P at 1450° C. and 11000 at. Then, it was finished into a die as shown in Figure 1. In addition, conventionally used carbide (material: K-30) was used as a comparison material.
テスト方法は、Ｎｉの粉末（粒径約５μｍ）をダイスに
充填した後、３ｔｏｎ／−の圧力になるようにプレス成
形した。１万個成形した後、ダイス側面で最も深く摩耗
した箇所の深さで評価を行った。The test method was to fill a die with Ni powder (particle size: about 5 μm), and then press mold it to a pressure of 3 tons/-. After molding 10,000 pieces, the depth of the most deeply worn part on the side of the die was evaluated.
その結果、本試作品の場合１３μｍであるのに対し、超
硬の場合３２μｍであった。そして、超硬の方が明らか
に粉末の凝着が多く、これが摩耗を促進させるものと思
われる。As a result, it was 13 μm in the case of this prototype, whereas it was 32 μm in the case of carbide. It is clear that cemented carbide has more powder adhesion, and this seems to promote wear.
以上説明のように、本発明粉末成形用ダイスは従来の超
硬製ダイスのように被成形粉末の付着、これに起因する
ダイス摩耗が生ずることがなく、工業上有益である。ま
た、金属粉末のみならずセラミックス等の硬質な粉末を
成形する場合にも有効である。As explained above, the powder molding die of the present invention is industrially useful because unlike conventional cemented carbide dies, there is no adhesion of powder to be molded and no die wear caused by this. Moreover, it is effective not only for molding metal powder but also for molding hard powder such as ceramics.
第１図は本発明粉末成形用ダイスの一実施例を示す断面
図である。
１・・・ダイス ２・・・ダイスケース第
１図FIG. 1 is a sectional view showing an embodiment of the powder compacting die of the present invention. 1... Dice 2... Dice case Figure 1
Claims (3)
る粉末成形用ダイス。(1) A powder compacting die characterized by being made of ZrO_2 ceramic.
〜４ｍｏｌ％含有するＺｒＯ＿２セラミックスである特
許請求の範囲第１項記載の粉末成形用ダイス。(2) ZrO_2 ceramics converts Y_2O_3 into 2
The powder compacting die according to claim 1, which is ZrO_2 ceramic containing ~4 mol%.
〜４ｍｏｌ％含有するＺｒＯ＿２４０〜９０ｗｔ％、残
部Ａｌ＿２Ｏ＿３である特許請求の範囲第１項記載の粉
末成形用ダイス。(3) ZrO_2 ceramics converts Y_2O_3 into 2
The die for powder compaction according to claim 1, which contains ~4 mol% of ZrO_240 to 90 wt%, and the balance is Al_2O_3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61240016A JP2533863B2 (en) | 1986-10-08 | 1986-10-08 | Dies for powder press molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61240016A JP2533863B2 (en) | 1986-10-08 | 1986-10-08 | Dies for powder press molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6395153A true JPS6395153A (en) | 1988-04-26 |
| JP2533863B2 JP2533863B2 (en) | 1996-09-11 |
Family
ID=17053208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61240016A Expired - Lifetime JP2533863B2 (en) | 1986-10-08 | 1986-10-08 | Dies for powder press molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2533863B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06277770A (en) * | 1993-03-29 | 1994-10-04 | Ngk Insulators Ltd | Press die made of ceramics |
| CN1045946C (en) * | 1991-01-24 | 1999-10-27 | 合肥工业大学 | Ceramic drawing die with precise structure and its production process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55130726A (en) * | 1979-03-30 | 1980-10-09 | Ngk Spark Plug Co | Hot press mold |
| JPS60215570A (en) * | 1984-04-06 | 1985-10-28 | 東ソー株式会社 | High strength zirconia sintered body dice |
| JPS60235762A (en) * | 1984-05-07 | 1985-11-22 | 東ソー株式会社 | High strength zirconia sintered body |
| JPS6135808A (en) * | 1984-07-26 | 1986-02-20 | Chiyoda Chem Eng & Constr Co Ltd | Production of porous membrane for gas diffusion separation |
-
1986
- 1986-10-08 JP JP61240016A patent/JP2533863B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55130726A (en) * | 1979-03-30 | 1980-10-09 | Ngk Spark Plug Co | Hot press mold |
| JPS60215570A (en) * | 1984-04-06 | 1985-10-28 | 東ソー株式会社 | High strength zirconia sintered body dice |
| JPS60235762A (en) * | 1984-05-07 | 1985-11-22 | 東ソー株式会社 | High strength zirconia sintered body |
| JPS6135808A (en) * | 1984-07-26 | 1986-02-20 | Chiyoda Chem Eng & Constr Co Ltd | Production of porous membrane for gas diffusion separation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045946C (en) * | 1991-01-24 | 1999-10-27 | 合肥工业大学 | Ceramic drawing die with precise structure and its production process |
| JPH06277770A (en) * | 1993-03-29 | 1994-10-04 | Ngk Insulators Ltd | Press die made of ceramics |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2533863B2 (en) | 1996-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |