JPH05239506A - Production of metal powder sintered compact - Google Patents
Production of metal powder sintered compactInfo
- Publication number
- JPH05239506A JPH05239506A JP4134692A JP4134692A JPH05239506A JP H05239506 A JPH05239506 A JP H05239506A JP 4134692 A JP4134692 A JP 4134692A JP 4134692 A JP4134692 A JP 4134692A JP H05239506 A JPH05239506 A JP H05239506A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- flat
- metal powder
- compact
- sintered body
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属粉末焼結体の製造
方法に関し、詳しくはアルミニウム（Ａｌ）粉末、マグ
ネシウム（Ｍｇ）粉末、チタン（Ｔｉ）粉末若しくはこ
れらの合金粉末又はこれらの混合粉末が主となる金属粉
末により高い成形体密度の成形体を成形し、この成形体
により緻密化が高く図られた焼結体を製造する金属粉末
焼結体の製造方法の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal powder sintered body, and more specifically, aluminum (Al) powder, magnesium (Mg) powder, titanium (Ti) powder or alloy powder thereof or mixed powder thereof. The present invention relates to an improvement in a method for producing a metal powder sintered body, in which a formed body having a high formed body density is formed from a metal powder mainly containing, and a sintered body which is highly densified by the formed body is produced.
【０００２】[0002]
【従来の技術】従来、粉末冶金法により、Ａｌ粉末、Ｍ
ｇ粉末、Ｔｉ粉末、これらの合金粉末又はこれらの混合
粉末等の各種の軽合金の金属粉末を用いた金属粉末焼結
体の製造方法が知られている（「金属材料と加工技術講
座１２・粉末冶金の技術と材料および性能」地人書館発
行）。この粉末冶金法では、例えば金属粉末を押出法等
によりバルク又は成形体とし、加圧、加熱して緻密化さ
れた焼結体を製造する。この焼結体は、均一な品質であ
ること、合金化しない材料も成形可能であること、金属
とセラミックなどの複合材料が得られること、大量生産
に適して材料の歩留りもよいこと、寸法精度がよいこと
等から、種々の部品、工具等に採用されている。2. Description of the Related Art Conventionally, Al powder and M have been prepared by powder metallurgy.
There is known a method for producing a metal powder sintered body using metal powders of various light alloys such as g powder, Ti powder, alloy powders thereof, or mixed powders thereof (see “Metal Material and Processing Technology Course 12. Powder metallurgy technology and materials and performance "by Jishin Shokan). In this powder metallurgy method, for example, metal powder is made into a bulk or a compact by an extrusion method or the like, and pressurized and heated to produce a densified sintered body. This sintered body has uniform quality, can form non-alloyed materials, can obtain composite materials such as metal and ceramics, is suitable for mass production and has good material yield, and dimensional accuracy Therefore, it is used for various parts, tools, etc.
【０００３】[0003]
【発明が解決しようとする課題】成形体密度は、成形体
抜き出し時に割れない条件下では、高い程後加工の焼結
緻密化の進行が容易になり、高強度の焼結体が得られ
る。しかし、従来の粉末冶金法では、一般に球状粉や不
規則形状粉からなる金属粉末を採用していたため、成形
体中の気孔率を充分低下させにくく、高価な冷間静水圧
焼結法（ＣＩＰ）等によらなければ成形体ひいては焼結
体が高い強度を確保しにくかった。また、高い強度の焼
結体を得るために、超急冷粉末を金属粉末として採用す
ることも考えられるが、超急冷粉末は極めて硬質である
ため、成形が非常に困難である。さらに、熱間押出法に
代表される焼結・バルク化過程では、高強度の焼結体を
得べく効果的な焼結を行なうためには、金属粉末の表面
の酸化膜を破壊する必要があるが、一般的な球状粉等を
金属粉末として採用すれば、大きな押出比を要し、やは
り製造コストの高騰を生じてしまう。The higher the density of the molded body, the more easily the sintering and densification in the post-processing will proceed, and the higher strength the sintered body can be obtained under the condition that the molded body is not cracked when the molded body is taken out. However, in the conventional powder metallurgical method, since the metal powder composed of spherical powder or irregularly shaped powder is generally adopted, it is difficult to sufficiently reduce the porosity in the molded body, and the expensive cold isostatic pressing (CIP) method is used. ), Etc., it was difficult to secure high strength for the molded body and thus the sintered body. Further, in order to obtain a high-strength sintered body, it is possible to adopt ultra-quenched powder as the metal powder, but since ultra-quenched powder is extremely hard, it is very difficult to mold it. Further, in the sintering / bulking process represented by the hot extrusion method, it is necessary to destroy the oxide film on the surface of the metal powder in order to perform effective sintering to obtain a high-strength sintered body. However, if a general spherical powder or the like is used as the metal powder, a large extrusion ratio is required, and the manufacturing cost also rises.
【０００４】本発明は、上記従来の事情に鑑みてなされ
たものであって、低い製造コストで高い強度の焼結体を
製造可能な金属粉末焼結体の製造方法を提供することを
目的とする。The present invention has been made in view of the above conventional circumstances, and an object of the present invention is to provide a method for producing a metal powder sintered body capable of producing a high-strength sintered body at a low production cost. To do.
【０００５】[0005]
（１）本第１発明の金属粉末焼結体の製造方法は、Ａｌ
粉末、Ｍｇ粉末、Ｔｉ粉末若しくはこれらの合金粉末又
はこれらの混合粉末が主となる金属粉末を加圧成形し、
緻密化する金属粉末焼結体の製造方法であって、前記金
属粉末として、平均粒径３〜２００μｍであるとともに
厚さに対する粒径からなる偏平比５以上の偏平粉を５０
体積％以上用意するとともに、平均粒径が該偏平粉の平
均粒径の２０％以下の球状粉を残部用意し、振動エネル
ギーを加えて成形する振動成形法によって、該金属粉末
中の該偏平粉を配向制御するとともに、成形体密度９０
％以上の成形体を成形する成形工程と、前記成形体の配
向方向と垂直方向に熱間又は温間加工を施し、焼結緻密
化する焼結工程と、を備えてなることを特徴とする。(1) The method for producing a metal powder sintered body according to the first aspect of the present invention is
Powder, Mg powder, Ti powder, alloy powder thereof, or metal powder whose main component is a powder mixture,
A method for producing a densified metal powder sintered body, wherein as the metal powder, 50 flat particles having an average particle size of 3 to 200 µm and a flatness ratio of 5 or more having a particle size with respect to a thickness are used.
The flat powder in the metal powder is prepared by a vibration molding method in which a spherical powder having an average particle diameter of 20% or less of the average particle diameter of the flat powder is prepared and the molding is performed by adding vibration energy. The orientation of the molded body and the density of the molded body of 90
% Or more of a molded body, and a sintering step of performing hot or warm working in a direction perpendicular to the orientation direction of the molded body to sinter and densify the molded body. ..
【０００６】第１発明の製造方法では、偏平粉は平均粒
径３〜２００μｍであるものを採用する。平均粒径３μ
ｍ未満では、球状粉に近似して本発明の効果が得られに
くくなるとともに、取扱いが困難になる。平均粒径２０
０μｍを超えると、金属粉末の絡み合いが少なく、成形
性が低下する。また、この偏平粉は偏平比（粒径／厚
さ）５以上のものを採用する。偏平比５未満では、緻密
化効果が得られにくい。In the manufacturing method of the first invention, the flat powder has an average particle diameter of 3 to 200 μm. Average particle size 3μ
If it is less than m, it becomes difficult to obtain the effects of the present invention in a manner similar to spherical powder, and handling becomes difficult. Average particle size 20
When it exceeds 0 μm, the entanglement of the metal powder is small and the formability is deteriorated. Further, this flat powder has a flatness ratio (particle diameter / thickness) of 5 or more. If the aspect ratio is less than 5, it is difficult to obtain the densification effect.
【０００７】球状粉は平均粒径が偏平粉の平均粒径の２
０％以下のものを採用する。偏平粉を５０体積％以上用
意するとともに、球状粉を残部用意する。偏平粉が５０
体積％未満では本発明の効果が得られにくい。 （２）本第２発明の金属粉末焼結体の製造方法は、Ａｌ
粉末、Ｍｇ粉末、Ｔｉ粉末若しくはこれらの合金粉末又
はこれらの混合粉末が主となる金属粉末を加圧成形し、
緻密化する金属粉末焼結体の製造方法であって、前記金
属粉末として、平均粒径３〜２００μｍであるとともに
厚さに対する粒径からなる偏平比５以上の偏平粉を９５
体積％以上用意し、振動エネルギーを加えて成形する振
動成形法によって、該金属粉末中の該偏平粉を配向制御
するとともに、成形体密度９０％以上の成形体を成形す
る成形工程と、前記成形体の配向方向と垂直方向に熱間
又は温間加工を施し、焼結緻密化する焼結工程と、を備
えてなることを特徴とする。The average particle size of spherical powder is 2 of the average particle size of flat powder.
Use 0% or less. Prepare 50% by volume or more of flat powder and the rest of spherical powder. 50 flat powders
If it is less than volume%, the effect of the present invention is difficult to be obtained. (2) The method for producing a metal powder sintered body according to the second aspect of the present invention is
Powder, Mg powder, Ti powder, alloy powder of these, or metal powder mainly consisting of mixed powder thereof, is pressure-molded,
A method for producing a densified metal powder sintered body, which comprises, as the metal powder, a flat powder having an average particle size of 3 to 200 μm and a flatness ratio of 5 or more having a particle size with respect to thickness.
A molding step of controlling the orientation of the flat powder in the metal powder and molding a molded body having a molded body density of 90% or more by a vibration molding method of preparing at least volume% and molding by adding vibration energy, And a sintering step of performing hot or warm working in a direction perpendicular to the orientation direction of the body to sinter and densify the body.
【０００８】第２発明の製造方法では、偏平粉を９５体
積％以上用意する。偏平粉が９５体積％以上であると、
より本発明の効果が得られる。In the manufacturing method of the second invention, the flat powder is prepared in an amount of 95% by volume or more. If the flat powder is 95% by volume or more,
The effect of the present invention is further obtained.
【０００９】[0009]
【作用】本発明者は、金属粉末として偏平粉を採用して
高い成形体密度の成形体を得、これにより焼結体の強度
を向上させることを検討した。この場合、偏平粉を主と
する成形体は、無配向状態では一般的な球状粉や不規則
形状粉を主とする成形体と比較して成形体密度が低くな
るが、本発明のように振動エネルギを利用して強制的に
配向制御できる振動成形法を活用すれば、成形体密度を
９０％以上に高くすることができる。しかも、その際、
成形加圧力は振動エネルギの活用により通常の１／２以
下であり、高価なＣＩＰ等の成形法を採用する必要がな
い。また、偏平粉を主とする高い成形体密度の成形体
は、配向方向と垂直方向に熱間又は温間加工を施すこと
により、金属粉末にせん断力を最も強く働かせることが
可能となり、金属粉末における表面の酸化膜を効果的に
破壊して焼結緻密化を進行させうる。The present inventor has studied the use of flat powder as the metal powder to obtain a compact having a high compact density, thereby improving the strength of the sintered compact. In this case, the compact mainly composed of flat powder has a lower compact density as compared with the compact mainly composed of general spherical powder or irregularly shaped powder in the non-oriented state, but as in the present invention. By utilizing a vibration molding method in which the orientation can be forcibly controlled by utilizing the vibration energy, the density of the molded body can be increased to 90% or more. Moreover, at that time,
The molding pressure is 1/2 or less of the normal pressure by utilizing the vibration energy, and there is no need to adopt an expensive molding method such as CIP. Further, a compact having a high compact density, which is mainly composed of flat powder, can be subjected to hot or warm working in the direction perpendicular to the orientation direction so that the shearing force can be exerted most strongly on the metal powder. It is possible to effectively destroy the oxide film on the surface to promote sintering and densification.
【００１０】[0010]
【実施例】以下、本発明を具体化した実施例１〜４を比
較例１〜４とともに図面を参照しつつ説明する。 （実施例１） 成形工程：金属粉末として、平均粒径３０μｍ、厚さ３
μｍ（偏平比１０）の偏平Ａｌ合金粉（ＪＩＳ２０２４
（Ｈｖ２２０））を１００体積（Ｖｆ）％用意する。な
お、偏平Ａｌ合金粉の平面図及び立面図を図２（Ａ）に
例示する。アサヒエンジニアリング（株）製のクロトン
振動成形プレス機により、図３に示すように、この偏平
Ａｌ合金粉を加圧面圧２ｔｏｎ／ｃｍ2 で加圧方向Ｐに
垂直に配向させて成形し、偏平Ａｌ合金粉のみからなる
成形体密度９６％（気孔率４％）の成形体を得る（な
お、図において黒塗りは気孔を示す。以下同様。）。EXAMPLES Examples 1 to 4 embodying the present invention will be described below together with Comparative Examples 1 to 4 with reference to the drawings. (Example 1) Molding process: As a metal powder, an average particle diameter of 30 μm and a thickness of 3
Flat Al alloy powder (JIS 2024)
(Hv220)) is prepared by 100 volume (Vf)%. A plan view and an elevation view of the flat Al alloy powder are illustrated in FIG. As shown in FIG. 3, this flat Al alloy powder was formed by orienting it perpendicularly to the pressing direction P at a pressing surface pressure of 2 ton / cm 2 using a croton vibration molding press manufactured by Asahi Engineering Co., Ltd. A compact having a compact density of 96% (porosity 4%) made of only alloy powder is obtained (the black coating in the figure indicates pores, and so on).
【００１１】焼結工程：図４に示すように、上記成形体
６をＣｕ製カプセル７に入れ、真空加熱脱気処理後、封
缶し、５００ｔｏｎ熱間押出機を用いて４００℃で偏平
Ａｌ合金粉の配向と垂直方向にダイ８間を押出比「２」
で矢印方向に押出し、偏平粉の配向と垂直方向に後加工
して金属粉末にせん断力を最も強く働かせる。こうし
て、金属粉末における表面の酸化膜を効果的に破壊して
焼結緻密化を進行させ、焼結体密度１００％の焼結体９
を得る。 （実施例２） 成形工程：金属粉末として、実施例１と同種の偏平Ａｌ
合金粉７５体積％と、平均粒径５μｍ（偏平Ａｌ合金粉
に対して１６．７％）の微細球状Ａｌ合金粉（ＪＩＳ２
０２４）２５体積％とを用意し、他は実施例１と同一の
条件の下、図５に示すように、偏平Ａｌ合金粉と微細球
状Ａｌ合金粉とからなる成形体密度９３％（気孔率７
％）の成形体を得る。なお、微細球状Ａｌ合金粉の立面
図を図２（Ｂ）に例示する。Sintering step: As shown in FIG. 4, the molded body 6 was placed in a Cu capsule 7, degassed by vacuum heating, sealed in a can, and heated to 400 ° C. using a 500 ton hot extruder to flatten Al. Extrusion ratio “2” between the dies 8 in the direction perpendicular to the alloy powder orientation
The metal powder is extruded in the direction of arrow and is post-processed in the direction perpendicular to the orientation of the flat powder to exert the strongest shearing force on the metal powder. In this way, the oxide film on the surface of the metal powder is effectively destroyed to advance the sintering and densification, and the sintered body 9 having a sintered body density of 100% is obtained.
To get (Example 2) Forming process: Flat metal of the same kind as in Example 1 as metal powder
Fine spherical aluminum alloy powder (JIS2) having 75% by volume of alloy powder and an average particle diameter of 5 μm (16.7% with respect to flattened aluminum alloy powder).
024) 25% by volume, and under the same conditions as in Example 1 except for that, as shown in FIG. 5, a compact density 93% (porosity) composed of flat Al alloy powder and fine spherical Al alloy powder 7
%) To obtain a molded product. An elevation view of the fine spherical Al alloy powder is illustrated in FIG. 2 (B).
【００１２】焼結工程：実施例１と同一の条件の下、焼
結体密度１００％の焼結体を得る。 （実施例３） 成形工程：金属粉末として、実施例１と同種の偏平Ａｌ
合金粉５０体積％と、実施例２と同種の微細球状Ａｌ合
金粉５０体積％とを用意し、他は実施例１と同一の条件
の下、成形体密度９０％（気孔率１０％）の成形体を得
る。Sintering step: Under the same conditions as in Example 1, a sintered body having a sintered body density of 100% is obtained. (Example 3) Molding process: Flat metal of the same kind as in Example 1 as metal powder
Under the same conditions as in Example 1, 50% by volume of the alloy powder and 50% by volume of the fine spherical Al alloy powder of the same kind as in Example 2 were prepared, and the compact density 90% (porosity 10%) was obtained. Obtain a molded body.
【００１３】焼結工程：実施例１と同一の条件の下、焼
結体密度１００％の焼結体を得る。 （実施例４） 成形工程：金属粉末として、平均粒径２０μｍ、厚さ２
μｍ（偏平比１０）の超急冷偏平Ａｌ合金粉（ＪＩＳ２
０２４（Ｈｖ３５０））を１００体積％用意し、他は実
施例１と同一の条件の下、成形体密度９５％（気孔率５
％）の成形体を得る。Sintering step: Under the same conditions as in Example 1, a sintered body having a sintered body density of 100% is obtained. (Example 4) Molding step: As metal powder, average particle diameter 20 μm, thickness 2
Ultra-quick flattened Al alloy powder (JIS2
024 (Hv350)) was prepared in an amount of 100% by volume, and under the same conditions as in Example 1 except for that, a compact density 95% (porosity 5
%) To obtain a molded product.
【００１４】焼結工程：３５０℃の押出比「１０」で押
出し、他は実施例１と同一の条件の下、焼結体密度１０
０％の焼結体を得る。 （比較例１） 成形工程：金属粉末として、実施例２と同種の微細球状
Ａｌ合金粉１００体積％を用意し、他は実施例１と同一
の条件の下、成形体を得たところ、成形体密度９２％
（気孔率８％）の成形体を得る。Sintering step: Extruded at an extrusion ratio of "10" at 350 ° C., under the same conditions as in Example 1 except that the density of the sintered body was 10
A 0% sintered body is obtained. (Comparative Example 1) Molding step: 100% by volume of a fine spherical Al alloy powder of the same type as in Example 2 was prepared as the metal powder, and a molded body was obtained under the same conditions as in Example 1 except that the molding was carried out. Body density 92%
A molded product having a porosity of 8% is obtained.
【００１５】焼結工程：実施例１と同一の条件の下、焼
結体密度１００％の焼結体を得る。 （比較例２） 成形工程：金属粉末として、平均粒径２０μｍ（偏平Ａ
ｌ合金粉に対して６．７％）の粗大球状Ａｌ合金粉（Ｊ
ＩＳ２０２４）１００体積％を用意し、他は実施例１と
同一の条件の下、成形体を得たところ、図６に示すよう
に、粗大球状Ａｌ合金粉からなる成形体密度８７％（気
孔率１３％）の成形体を得る。Sintering step: Under the same conditions as in Example 1, a sintered body having a sintered body density of 100% is obtained. (Comparative Example 2) Molding process: Metal powder having an average particle size of 20 μm (flat A
Coalescent spherical Al alloy powder (J% to 6.7%) (J
IS2024) 100% by volume was prepared, and a compact was obtained under the same conditions as in Example 1 except that, as shown in FIG. 6, the compact density of the coarse spherical Al alloy powder was 87% (porosity). 13%) molded body is obtained.
【００１６】焼結工程：実施例１と同一の条件の下、焼
結体密度９８％の焼結体を得る。（比較例３） 成形工程：金属粉末として、実施例１と同種の偏平Ａｌ
合金粉７５体積％と、比較例２と同種の粗大球状Ａｌ合
金粉２５体積％とを用意し、他は実施例１と同一の条件
の下、成形体を得たところ、図７に示すように、偏平Ａ
ｌ合金粉と粗大球状Ａｌ合金粉とからなる成形体密度７
５％（気孔率２５％）の成形体を得る。Sintering step: Under the same conditions as in Example 1, a sintered body having a sintered body density of 98% is obtained. (Comparative Example 3) Molding process: Flat metal of the same kind as in Example 1 as a metal powder.
An alloy powder was prepared under the same conditions as in Example 1 except that 75% by volume of alloy powder and 25% by volume of coarse spherical Al alloy powder of the same type as in Comparative Example 2 were prepared, and as shown in FIG. And flat A
Compacted body density of 1 alloy powder and coarse spherical Al alloy powder 7
A 5% (porosity 25%) compact is obtained.
【００１７】焼結工程：実施例１と同一の条件の下、焼
結体密度７５％の焼結体を得る。（比較例４） 成形工程：金属粉末として、平均粒径１０μｍ（偏平Ａ
ｌ合金粉に対して３．３％）の球状Ａｌ合金粉（ＪＩＳ
２０２４）５０体積％と、実施例１と同種の偏平Ａｌ合
金粉５０体積％とを用意し、他は実施例１と同一の条件
の下、成形体を得たところ、成形体密度８０％（気孔率
２０％）の成形体を得る。Sintering step: Under the same conditions as in Example 1, a sintered body having a sintered body density of 75% is obtained. (Comparative Example 4) Molding process: Metal powder having an average particle diameter of 10 μm (flat A
3.3% spherical aluminum alloy powder (JIS)
2024) 50% by volume and 50% by volume of flat Al alloy powder of the same kind as in Example 1 were prepared, and a compact was obtained under the same conditions as in Example 1, except that the compact density was 80% ( A molded product having a porosity of 20% is obtained.
【００１８】焼結工程：実施例１と同一の条件の下、焼
結体密度９６％の焼結体を得る。（評価） 実施例１〜３、比較例３、４の成形体の気孔率を図１に
示す。図１より、偏平Ａｌ合金粉が５０体積％以上、平
均粒径が偏平Ａｌ合金粉の平均粒径の２０％以下の球状
Ａｌ合金粉が残部であることにより、振動エネルギを利
用して強制的に配向制御できる振動成形法の活用によ
り、成形体密度を９０％以上にできることがわかる。 （試験）成形体中の偏平粉混合比率と成形体中の気孔率
との関係を図８に示す。図８において、Ａ曲線は実施例
１と同種の偏平Ａｌ合金粉と実施例２と同種の微細球状
Ａｌ合金粉との混合粉末からなる金属粉末を振動成形し
た場合、Ｂ曲線は同偏平Ａｌ合金粉と比較例２と同種の
粗大球状Ａｌ合金粉との混合粉末からなる金属粉末を振
動成形した場合、Ｃ曲線は同偏平Ａｌ合金粉と同微細球
状Ａｌ合金粉との混合粉末からなる金属粉末を一般成形
（振動させない成形）した場合、Ｄ曲線は同偏平Ａｌ合
金粉と同粗大球状Ａｌ合金粉との混合粉末からなる金属
粉末を一般成形した場合を示す。図８により、本発明の
範囲に一部が該当するＡ曲線では、成形体中の偏平粉の
混合比率が５０体積％以上であれば、成形体密度９０％
以上の成形体が得られることがわかる。よって、本発明
の製造方法では、後加工の焼結緻密化の進行が容易な成
形体密度９０％以上にすることができるため、高強度の
焼結体が得られることがわかる。Sintering step: Under the same conditions as in Example 1, a sintered body having a sintered body density of 96% is obtained. (Evaluation) The porosities of the molded bodies of Examples 1 to 3 and Comparative Examples 3 and 4 are shown in FIG. From FIG. 1, since the spherical Al alloy powder having 50% by volume or more of the flat Al alloy powder and 20% or less of the average particle size of the flat Al alloy powder is the rest, the vibration energy is used forcibly. It can be seen that the density of the molded body can be increased to 90% or more by utilizing the vibration molding method capable of controlling the orientation. (Test) The relationship between the flat powder mixing ratio in the compact and the porosity in the compact is shown in FIG. In FIG. 8, the curve A is the same flat aluminum alloy powder as in Example 1 and the fine spherical aluminum alloy powder of the same kind as in Example 2 is subjected to vibration molding, and the curve B is the same flat Al alloy powder. When a metal powder made of a mixed powder of the powder and a coarse spherical Al alloy powder of the same type as that of Comparative Example 2 is vibration-molded, the C curve shows a metal powder made of a mixed powder of the same flat Al alloy powder and the same fine spherical Al alloy powder. In the case of general molding (molding without vibration), the D curve shows the case of general molding of a metal powder made of a mixed powder of the same flat Al alloy powder and the coarse spherical Al alloy powder. According to FIG. 8, in the A curve, a part of which falls within the range of the present invention, if the mixing ratio of the flat powder in the compact is 50% by volume or more, the compact density 90%
It can be seen that the above molded body can be obtained. Therefore, according to the manufacturing method of the present invention, it is possible to obtain a high-strength sintered body because the density of the formed body can be set to 90% or more, which facilitates the progress of sintering and densification in post-processing.
【００１９】しかも、その際、成形加圧力が通常の１／
２以下であるため、高価なＣＩＰ等の成形法を採用する
必要がなく、低い製造コストで焼結体を製造することが
できる。In addition, at that time, the molding pressure is 1 / normal.
Since it is 2 or less, it is not necessary to use an expensive molding method such as CIP, and a sintered body can be manufactured at a low manufacturing cost.
【００２０】[0020]
【発明の効果】以上詳述したように、本発明の金属粉末
焼結体の製造方法では、所定の偏平粉からなる金属粉末
を採用し、振動エネルギを利用して強制的に配向制御
し、かつ偏平粉の配向と垂直方向に後加工するため、低
い製造コストで高い強度の焼結体を製造することができ
る。As described above in detail, in the method for producing a metal powder sintered body of the present invention, a metal powder made of a predetermined flat powder is adopted, and the orientation is forcibly controlled by utilizing vibration energy. Moreover, since the post-processing is performed in the direction perpendicular to the orientation of the flat powder, it is possible to manufacture a high-strength sintered body at a low manufacturing cost.
【図１】実施例１〜３、比較例３、４の成形体の気孔率
を示すグラフである。FIG. 1 is a graph showing the porosity of molded bodies of Examples 1 to 3 and Comparative Examples 3 and 4.
【図２】（Ａ）は偏平Ａｌ合金粉の平面図及び立面図、
（Ｂ）は球状Ａｌ合金粉の立面図である。2A is a plan view and an elevation view of a flat Al alloy powder, FIG.
(B) is an elevation view of spherical Al alloy powder.
【図３】実施例１の成形体の成形状態を示す側面図であ
る。3 is a side view showing a molded state of the molded body of Example 1. FIG.
【図４】実施例１の成形体を熱間押出加工した状態を示
す断面図である。FIG. 4 is a cross-sectional view showing a state where the molded body of Example 1 is hot extruded.
【図５】実施例２の成形体の成形状態を示す側面図であ
る。5 is a side view showing a molded state of the molded body of Example 2. FIG.
【図６】比較例２の成形体の成形状態を示す側面図であ
る。FIG. 6 is a side view showing a molded state of a molded body of Comparative Example 2.
【図７】比較例３の成形体の成形状態を示す側面図であ
る。FIG. 7 is a side view showing a molded state of a molded body of Comparative Example 3.
【図８】成形体中の偏平粉混合比率と成形体中の気孔率
との関係を示すグラフである。FIG. 8 is a graph showing the relationship between the flat powder mixing ratio in the compact and the porosity in the compact.
６…成形体 ７…Ｃｕ製カプセル
８…ダイ ９…焼結体6 ... Molded body 7 ... Cu capsule
8 ... Die 9 ... Sintered body
Claims (2)
タン粉末若しくはこれらの合金粉末又はこれらの混合粉
末が主となる金属粉末を加圧成形し、緻密化する金属粉
末焼結体の製造方法において、 前記金属粉末として、平均粒径３〜２００μｍであると
ともに厚さに対する粒径からなる偏平比５以上の偏平粉
を５０体積％以上用意するとともに、平均粒径が該偏平
粉の平均粒径の２０％以下の球状粉を残部用意し、振動
エネルギーを加えて成形する振動成形法によって、該金
属粉末中の該偏平粉を配向制御するとともに、成形体密
度９０％以上の成形体を成形する成形工程と、 前記成形体の配向方向と垂直方向に熱間又は温間加工を
施し、焼結緻密化する焼結工程と、を備えてなることを
特徴とする金属粉末焼結体の製造方法。1. A method for producing a metal powder sintered body, which comprises compacting and densifying a metal powder mainly composed of aluminum powder, magnesium powder, titanium powder, an alloy powder thereof, or a mixed powder thereof, wherein As the powder, 50% by volume or more of flat powder having an average particle size of 3 to 200 μm and a flatness ratio of 5 or more and having a particle size with respect to thickness is prepared, and the average particle size is 20% or less of the average particle size of the flat powder. A spherical powder of the rest, and by a vibration molding method of molding by applying vibration energy, while controlling the orientation of the flat powder in the metal powder, and molding a molded body having a molded body density of 90% or more, And a sintering step of performing hot or warm working in a direction perpendicular to the orientation direction of the molded body to sinter and densify it.
タン粉末若しくはこれらの合金粉末又はこれらの混合粉
末が主となる金属粉末を加圧成形し、緻密化する金属粉
末焼結体の製造方法において、 前記金属粉末として、平均粒径３〜２００μｍであると
ともに厚さに対する粒径からなる偏平比５以上の偏平粉
を９５体積％以上用意し、振動エネルギーを加えて成形
する振動成形法によって、該金属粉末中の該偏平粉を配
向制御するとともに、成形体密度９０％以上の成形体を
成形する成形工程と、 前記成形体の配向方向と垂直方向に熱間又は温間加工を
施し、焼結緻密化する焼結工程と、を備えてなることを
特徴とする金属粉末焼結体の製造方法。2. A method for producing a metal powder sintered body, which comprises compacting and densifying a metal powder mainly composed of aluminum powder, magnesium powder, titanium powder, an alloy powder thereof, or a mixed powder thereof, wherein 95% by volume or more of flat powder having an average particle size of 3 to 200 μm and a flatness ratio of 5 or more having a particle size with respect to the thickness is prepared, and vibration powder is added to the metal powder by a vibration molding method. Of controlling the orientation of the flat powder, and forming a compact having a compact density of 90% or more, and performing hot or warm working in a direction perpendicular to the orientation direction of the compact to sinter and densify. A method of manufacturing a metal powder sintered body, comprising: a sintering step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4041346A JP3006263B2 (en) | 1992-02-27 | 1992-02-27 | Method for producing metal powder sintered body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4041346A JP3006263B2 (en) | 1992-02-27 | 1992-02-27 | Method for producing metal powder sintered body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05239506A true JPH05239506A (en) | 1993-09-17 |
| JP3006263B2 JP3006263B2 (en) | 2000-02-07 |
Family
ID=12605958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4041346A Expired - Lifetime JP3006263B2 (en) | 1992-02-27 | 1992-02-27 | Method for producing metal powder sintered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3006263B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5429393B2 (en) * | 2010-09-30 | 2014-02-26 | 株式会社村田製作所 | Multilayer ceramic electronic component and method of manufacturing multilayer ceramic electronic component |
-
1992
- 1992-02-27 JP JP4041346A patent/JP3006263B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5429393B2 (en) * | 2010-09-30 | 2014-02-26 | 株式会社村田製作所 | Multilayer ceramic electronic component and method of manufacturing multilayer ceramic electronic component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3006263B2 (en) | 2000-02-07 |
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