JPS61194101A - Method for degassing al powder and al alloy powder - Google Patents
Method for degassing al powder and al alloy powderInfo
- Publication number
- JPS61194101A JPS61194101A JP60032457A JP3245785A JPS61194101A JP S61194101 A JPS61194101 A JP S61194101A JP 60032457 A JP60032457 A JP 60032457A JP 3245785 A JP3245785 A JP 3245785A JP S61194101 A JPS61194101 A JP S61194101A
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- JP
- Japan
- Prior art keywords
- powder
- degassing
- alloy
- air
- heating
- 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.)
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- 239000000843 powder Substances 0.000 title claims abstract description 66
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 23
- 238000007872 degassing Methods 0.000 title claims description 46
- 238000000034 method Methods 0.000 title claims description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims abstract 2
- 238000001125 extrusion Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000009849 vacuum degassing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000000956 alloy Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001680 bayerite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はＡｌもしくはＡｌ合金の粉体の脱ガス処理に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the degassing treatment of Al or Al alloy powder.
更に詳細には本発明はブリスターのない真密度Ａｌ合金
材料の原材料として好適に使用できるＡｌもしくはＡｌ
合金粉末の経済的かつ簡便な脱ガス処理方法に関する。More specifically, the present invention provides Al or Al that can be suitably used as a raw material for true density Al alloy material without blisters.
This invention relates to an economical and simple degassing method for alloy powder.
従来の技術
Ａｌ粉およびへ１合金粉、それらの混合粉を圧縮成形し
、それらを熱間押出加工によって真密度Ａｌ合金材料と
する合金製造法は新素材開発方法として注目されている
。しかしながら、この場合、粉末に吸着したガスが押出
加工後にブリスター（気泡）となったり、あるいは押出
材の熱処理時にブリスターや気孔となるため、脱ガス処
理が不可欠である。BACKGROUND OF THE INVENTION An alloy manufacturing method in which Al powder, He1 alloy powder, and a mixed powder thereof are compressed and hot extruded into a true density Al alloy material is attracting attention as a new material development method. However, in this case, degassing treatment is essential because the gas adsorbed to the powder becomes blisters (bubbles) after extrusion processing, or becomes blisters or pores during heat treatment of the extruded material.
このようなブリスターや気孔の発生の防止のため従来技
術においては、粉末あるいは成形体を缶に入れて真空中
で加熱し脱ガス後封缶したり、あるいは粉末を真空中で
ホットプレスすることで脱ガスと同時に圧縮成形するこ
とによって、押出用のビレットとしていた。しかしなが
ら、このような方法による脱ガス処理は工数が増えるば
かりではなく、缶入り押出の場合には素材の歩留りも著
しく低下する欠点を有している。In order to prevent the formation of such blisters and pores, conventional techniques include placing the powder or molded body in a can, heating it in a vacuum, degassing it, and then sealing the can, or hot pressing the powder in a vacuum. A billet for extrusion was made by compression molding at the same time as degassing. However, degassing treatment by such a method not only increases the number of man-hours, but also has the disadvantage that, in the case of canned extrusion, the yield of the material decreases significantly.
発明の解決すべき問題点
本発明は、ブリスターや気孔のない真密度ＡｔまたはＡ
ｌ合金を経済的に製造可能な方法を提供することを目的
とする。さらに詳細には本発明は、真密度ＡｌまたはＡ
ｌ合金の材料であるＡｌ粉およびＡｌ合金粉、それらの
混合粉の脱ガス処理を経済的かつ簡便に実施する方法を
提供することを目的とする。Problems to be Solved by the Invention The present invention provides true density At or A without blisters or pores.
The object of the present invention is to provide a method for economically producing L alloys. More specifically, the present invention provides true density Al or A
It is an object of the present invention to provide an economical and simple method for degassing Al powder, Al alloy powder, and mixed powder thereof, which are materials for l-alloy.
問題点を解決する手段
本発明は、従来粉末が酸化するため非常識とされていた
空気中加熱だけによって脱ガス処理を行うことによって
、ブリスター等の欠陥のないＡｌ合金押出素材やＡｌ合
金粉末鍛造部品を提供するものである。Means for Solving the Problems The present invention is capable of producing aluminum alloy extruded materials and aluminum alloy powder forgings free from defects such as blisters by performing degassing treatment only by heating in air, which was conventionally considered unreasonable because the powder would oxidize. It provides parts.
すなわち本発明に従うと、Ａｌ粉、Ａｌ合金粉、および
それらを含む混合粉のいずれかからなる粉体、またはそ
れらの圧縮成形体を空気中加熱により脱ガス処理するこ
とを特徴とする方法が提供される。That is, according to the present invention, there is provided a method characterized in that a powder made of any of Al powder, Al alloy powder, and a mixed powder containing them, or a compression molded product thereof, is degassed by heating in air. be done.
加熱温度は、２００℃以上且つ粉体の融点以下であり、
また、大気中でも実施できるが、除湿乾燥空気中で加熱
処理するのが好ましい。The heating temperature is 200°C or higher and lower than the melting point of the powder,
Further, although the heat treatment can be carried out in the air, it is preferable to carry out the heat treatment in dehumidified dry air.
発明の作用
以下、本発明に至った検討の過程と本発明の詳細な説明
する。Effects of the Invention Below, the study process that led to the present invention and the detailed explanation of the present invention will be described.
従来、粉末に吸着したガスの脱ガスは、熱力学的な観点
から、真空度と温度に平衡した平衡ガス圧力を求める方
法から脱ガスプロセスを予測するのが一般的であった（
ＬＥＹＢＤＬＤＨＥＲＡＥＵＳ ＧＭＢ）Ｉ、Ｖａｃｕ
ｕｍＤｅｇａｓｓｉｎｇ ｏｆ Ｍｅｔａｌ Ｐ
ｏｗｄｅｒｓ、 ｂｙ Ｐ、Ｆｌｅｃｈｅｒ ａ
ｎｄＲ，Ｒｕｔｈａｒｄｔ参照）。Conventionally, the degassing process of gases adsorbed in powder has been generally predicted from a thermodynamic point of view by determining the equilibrium gas pressure that is balanced with the degree of vacuum and temperature (
LEYBDLDHERAEUS GMB) I, Vacu
umDegassing of Metal P
owders, by P, Flecher a
ndR, Ruthardt).
又、一般には、大気中では酸化が進行するため、大気中
脱ガスは従来検討されたことがなかった。Furthermore, since oxidation generally progresses in the atmosphere, degassing in the atmosphere has not been considered in the past.
しかしながら、■現実の脱ガスプロセスは、時間の関係
した速度論的な過程であり、■しかも吸着ガスのように
は熱力学的に予測することのできない水分を含んでおり
、■Ａｌ粉あるいはＡｌ合金粉の場合には、強固な酸化
皮膜は還元することが困難であり、しかも実際に大気中
加熱を行って形成される酸化皮膜の増加はわずかである
。However, ■The actual degassing process is a time-related kinetic process, ■Moreover, it contains moisture, which cannot be predicted thermodynamically like adsorbed gas, and ■Al powder or Al In the case of alloy powder, it is difficult to reduce the strong oxide film, and the increase in the oxide film formed by actually heating in the atmosphere is small.
以上の点から、まず大気中で脱水分（ガス）が可能かど
うかを理論的に推測した。Based on the above points, we first theoretically estimated whether dehydration (gas) is possible in the atmosphere.
〈熱力学的検討〉
各種粉末温度Ｔ （Ｋ）において、ｌｐｐｍの水蒸気ｉ
Ｍになるための平衡分圧（ｍｂｒ）は概略、で与えられ
、表１に示すごとくなる。<Thermodynamic study> At various powder temperatures T (K), lppm of water vapor i
The equilibrium partial pressure (mbr) for achieving M is approximately given by, and is as shown in Table 1.
表１
一方、大気中の飽和水蒸気圧は、第１図に示す如くなっ
ており、日本において最も高温多湿である梅雨時を例に
とって考えると、気温３０℃で相対湿度１００％なら大
気中の飽和水蒸気圧は４２ｍｂａｒということがわかる
。従って、このように湿度の高い場合でも、表１によれ
ば、大気中脱ガス温度が約４２０℃以上なら、熱力学的
には粉末の水蒸気量は１ ｐｐｍ以下になる。Table 1 On the other hand, the saturated water vapor pressure in the atmosphere is as shown in Figure 1. Taking the rainy season, which is the hottest and humid season in Japan, as an example, if the temperature is 30°C and the relative humidity is 100%, the saturated water vapor pressure in the atmosphere is It can be seen that the water vapor pressure is 42 mbar. Therefore, even in the case of such high humidity, according to Table 1, if the atmospheric degassing temperature is about 420° C. or higher, thermodynamically the amount of water vapor in the powder is 1 ppm or less.
さらに春秋の気温２５℃で相対湿度５０％程度のときに
は、大気中の水蒸気圧はｌ［３ｍｂａｒであり、表１に
よれば大気中脱ガス温度が約３８０℃以上なら、又、冬
期の温度５℃で相対湿度３０％なら大気中の水蒸気圧は
約３ ｍｂａｒであり、表１によれば約３２０℃以上で
加熱すれば、その温度で粉末の水蒸気量１ρρｍと平衡
する水蒸気分圧よりも低くなるため、大気中加熱によっ
て水蒸気量Ｌｐｐｍ以下まで脱ガス処理が可能なことが
わかる。Furthermore, when the temperature in spring and autumn is 25℃ and the relative humidity is about 50%, the water vapor pressure in the atmosphere is 1 [3 mbar. According to Table 1, if the atmospheric degassing temperature is about 380℃ or higher, then the temperature in winter is 5 ℃ and relative humidity of 30%, the water vapor pressure in the atmosphere is about 3 mbar, and according to Table 1, if heated above about 320℃, the water vapor partial pressure will be lower than the water vapor partial pressure that is in equilibrium with the powder's water vapor content of 1ρρm at that temperature. Therefore, it can be seen that degassing treatment is possible to reduce the amount of water vapor to Lppm or less by heating in the atmosphere.
以上のように、熱力学的側面からの大気中脱ガスの可能
性が確認できた。一方、実際にできるかどうか又、でき
るとすれば、どの程度、どれぐらいの時間を必要とする
かは、速度論的検討が必要になるが、ここで問題として
いるのは実際の脱ガス処理であるので、次ぎに定性的な
検討のみを行う。As described above, the possibility of atmospheric degassing from a thermodynamic perspective was confirmed. On the other hand, kinetic studies are needed to determine whether this can actually be done, and if so, how much time it will take, but the issue here is the actual degassing process. Therefore, only a qualitative study will be performed next.
粉末吸着した水が脱ガスするのは、熱活性化過程にある
反応速度論とみなすことができる。従って、温度が高い
ほど粉末の脱ガスは速く進行し、同じ水蒸気量、例えば
ｌｐｐｍとなるのに短時間となることが予測できる。The degassing of powder-adsorbed water can be viewed as a reaction kinetics during the thermal activation process. Therefore, it can be predicted that the higher the temperature, the faster the degassing of the powder will proceed, and it will take a shorter time to reach the same amount of water vapor, for example 1 ppm.
又、当然のことながら、同温度ならば、長時間加熱する
ほど粉末の水掬気量は低くなるり、またその温度での粉
末中のある水蒸気量（例えばｌ ｐｐｍ）との平衡水蒸
気圧よりも、脱ガスに使用する大気中の水蒸気圧が低け
れば低いほど、速く脱ガスできる。例えば上記の梅雨時
、春秋、冬を比較すれば、同じ温度、例えば４５０℃で
大気中加熱すれば、冬が最も速く脱ガスでき、次いで春
秋、梅雨時が最も遅い。さらにこのことは、除湿乾燥空
気を使用すれば、より一層脱ガスが容易になることを示
している。Naturally, at the same temperature, the longer the heating time, the lower the water absorption capacity of the powder, and the lower the equilibrium water vapor pressure with a certain amount of water vapor in the powder (for example, 1 ppm) at that temperature. Also, the lower the water vapor pressure in the atmosphere used for degassing, the faster the gas can be degassed. For example, if we compare the rainy season, spring/autumn, and winter, if we heat in the air at the same temperature, for example, 450°C, degassing is fastest in winter, followed by spring/autumn, and slowest in rainy season. Furthermore, this shows that degassing becomes even easier when dehumidified dry air is used.
上記の速度論的検討と後述の実施例より、健全なＡｌ粉
末押出材を得るには、実際の脱ガス温度が２００℃以下
では長時間かけても脱ガスが不十分であることがわかる
。From the above kinetic study and the examples described later, it can be seen that in order to obtain a sound Al powder extruded material, degassing is insufficient when the actual degassing temperature is 200° C. or less even if it takes a long time.
又、脱ガス処理自体は、粉末のまま行ってもよいし、粉
末を一旦、成形体にしてから行ってもよい。当然ながら
、後者の場合には、前者にくらべて脱ガス速度は遅くな
り、粉末の場合よりも長時間の加熱が必要となる。また
、粉末の場合、粉末を攪拌すれば脱ガス速度は促進され
る。Further, the degassing treatment itself may be performed as a powder, or may be performed after the powder is once formed into a compact. Naturally, in the latter case, the degassing rate is slower than in the former case, and a longer heating time is required than in the case of powder. In addition, in the case of powder, stirring the powder will accelerate the degassing rate.
ところで、Ａｌ粉の場合、表面の酸化皮膜は緻密である
ため大気中加熱によってもそれほどは成長しないという
アルミニウムの特性も大気中加熱脱ガスに有効に働いて
いる。又、速度論的な意味から高温はど脱ガス速度が速
くなることを述べたが、一方、表面酸化膜構造、すなわ
ち各種アルミニウム酸化物の点からも、高温加熱脱ガス
が有利である。つまり、その後の工程でブリスターの原
因となる結晶水として結合している酸化物（ｂａｙｅｒ
ｉｔｅやｂｏｈｍｉｔｅ）を安定なαアルミナにする
ためには、高温はど容易になる。By the way, in the case of Al powder, the oxide film on the surface is dense, so the characteristic of aluminum that it does not grow much even when heated in the air is also effective in degassing by heating in the air. Further, from a kinetic point of view, it has been stated that the degassing rate becomes faster at high temperatures, but on the other hand, high temperature heating degassing is also advantageous from the point of view of the surface oxide film structure, that is, various aluminum oxides. In other words, oxides (Bayer
ite and bohmite) into stable alpha alumina, it is easy to use high temperatures.
以下、本発明を実施例により説明するが、これらの実施
例は本発明の単なる例示であって、本発明の範囲を何隻
制限するものではない。Hereinafter, the present invention will be explained with reference to Examples, but these Examples are merely illustrative of the present invention and do not limit the scope of the present invention.
実施例
Ａｌ−２０ｗｔ％Ｓｉ−４ｗｔ％Ｃｕ−１ｗｔ％Ｍｇ合
金粉末（−１００メツシユ）を３ｔ／ｃｎｆでφ１５５
ｍｍ Ｘ １１５０ｍｍにＣＩＰ（冷間静水圧ブス）成
形した成形体を、３００℃、４００℃、５００℃の各温
度の乾燥空気にて時間を変えて脱ガス処理し、それを押
出用ビレットとして用いて押出比ｌＯ：１にて押出加工
を行った。Example Al-20wt%Si-4wt%Cu-1wt%Mg alloy powder (-100 mesh) was φ155 at 3t/cnf.
A CIP (cold isostatic pressure bus) molded body of mm x 1150 mm was degassed with dry air at temperatures of 300°C, 400°C, and 500°C for different times, and used as a billet for extrusion. Extrusion processing was performed at an extrusion ratio of lO:1.
得られた押出材を５００℃で加熱した時にブリスターが
発生し始めた時間を求めた。第２図にその結果を示す。When the obtained extruded material was heated at 500° C., the time at which blisters began to occur was determined. Figure 2 shows the results.
第２図に示すように脱ガス温度が高いほど、また、脱ガ
ス処理が長時間となるほどブリスターの発生開始時間が
遅くなることがわかる。As shown in FIG. 2, it can be seen that the higher the degassing temperature is, and the longer the degassing treatment is, the later the time at which blisters start forming becomes delayed.
Ｔ６処理等の熱処理を行う場合、溶体化温度を５００℃
、加熱時間を４時間と仮定するならば、空気中脱ガス条
件としては、５００℃なら２時間以上、４００℃なら６
時間以上、３００℃なら２０時間以上の脱ガス加熱によ
ってブリスターの発生が防止できることが確認できた。When performing heat treatment such as T6 treatment, the solution temperature should be 500℃.
Assuming that the heating time is 4 hours, the degassing conditions in air are 2 hours or more at 500℃, 6 hours at 400℃.
It was confirmed that the generation of blisters could be prevented by degassing heating for 20 hours or more at 300°C.
名工ｐ皇】
上記した如く、本発明はＡｌ、Ａｌ合金もしくはそれら
の混合物からなる粉体を空気中で加熱することによって
粉体内の脱ガス、特に脱水蒸気を好適に実施できる方法
を提供するものである。As described above, the present invention provides a method for suitably degassing, particularly dehydrating, vapor in the powder by heating the powder made of Al, Al alloy, or a mixture thereof in air. It is.
本発明の脱ガス処理は空気雰囲気、好適には除湿乾燥空
気中で行うので、従来の真空中での脱ガス処理等に比べ
て工程数が少なく、設備も簡素であり、高能率で実施す
ることができる。Since the degassing treatment of the present invention is performed in an air atmosphere, preferably in dehumidified dry air, the number of steps is fewer than in conventional degassing treatment in a vacuum, the equipment is simple, and it can be carried out with high efficiency. be able to.
さらに、得られた脱ガス処理後の粉体は従来技術とはゾ
同等の品質であり、空気中の加熱処理にもかかわらず酸
化被膜の増大もなく、真密度ＡｌもしくはＡｌ合金の製
造に極めて好適である。Furthermore, the obtained powder after degassing treatment is of the same quality as the conventional technology, and there is no increase in oxide film despite heat treatment in air, making it extremely suitable for producing true density Al or Al alloy. suitable.
第１図は温度と大気中の飽和水蒸気圧との関係を示すグ
ラフであり、
第２図は本発明の実施例において脱ガス処理後、押出し
加工して得られたＡｌ合金ビレットの脱ガス処理時間と
５００℃加熱後のブリスター発生開始時間との関係を示
すグラフである。
特許出願人 住友電気工業株式会社
代 理 人 弁理士 新居 正彦
第１図
遍 度（°Ｃ）
第２ＷＩ
説Ｄ“ス怨理時間（ｈ「）FIG. 1 is a graph showing the relationship between temperature and saturated water vapor pressure in the atmosphere, and FIG. 2 is a graph showing the degassing treatment of an Al alloy billet obtained by extrusion processing after degassing treatment in an example of the present invention. It is a graph showing the relationship between time and blister generation start time after heating at 500°C. Patent Applicant Sumitomo Electric Industries Co., Ltd. Representative Patent Attorney Masahiko Arai
Claims (9)
のいずれかからなる粉体を空気中加熱により脱ガス処理
することを特徴とする方法。(1) A method characterized by degassing a powder made of any one of Al powder, Al alloy powder, and mixed powder containing them by heating in air.
許請求の範囲第１項記載のＡｌ粉およびＡｌ合金粉の脱
ガス処理方法(2) A method for degassing Al powder and Al alloy powder according to claim 1, wherein the powder is a compression molded body.
度で空気中加熱することを特徴とする特許請求の範囲第
１項または第２項記載のＡｌ粉およびＡｌ合金粉の脱ガ
ス処理方法(3) Degassing of Al powder and Al alloy powder according to claim 1 or 2, characterized in that the powder is heated in air at a temperature of 200° C. or higher and lower than the melting point of the powder. Processing method
許請求の範囲第１項乃至第３項のいずれかに記載のＡｌ
粉およびＡｌ合金粉の脱ガス処理方法(4) Al according to any one of claims 1 to 3, characterized in that the powder is heated in the atmosphere.
Degassing method for powder and Al alloy powder
とする特許請求の範囲第１項乃至第３項のいずれかに記
載のＡｌ粉およびＡｌ合金粉の脱ガス処理方法(5) A method for degassing Al powder and Al alloy powder according to any one of claims 1 to 3, characterized in that the powder is heated in dehumidified dry air.
のいずれかからなる粉体の圧縮成形体を空気中加熱して
脱ガス処理し、得られた脱ガス処理後の圧縮成形体を押
出用ビレットや鋳造用プリフォームとして用いることを
特徴とするＡｌまたはＡｌ合金を製造する方法。(6) A compression molded body of powder made of either Al powder, Al alloy powder, or a mixed powder containing them is heated in air to degas it, and the resulting compression molded body after degassing treatment is A method for producing Al or an Al alloy, characterized in that it is used as a billet for extrusion or a preform for casting.
融点以下の温度で空気中加熱することを特徴とする特許
請求の範囲第６項記載のＡｌまたはＡｌ合金を製造する
方法。(7) A method for producing Al or an Al alloy according to claim 6, characterized in that the compression-molded body of the powder is heated in air at a temperature of 200° C. or higher and lower than the melting point of the powder.
特徴とする特許請求の範囲第６項または７項のいずれか
に記載のＡｌまたはＡｌ合金を製造する方法。(8) A method for producing Al or an Al alloy according to claim 6 or 7, characterized in that the compression molded body of the powder is heated in the atmosphere.
ることを特徴とする特許請求の範囲第６項または７項の
いずれかに記載のＡｌまたはＡｌ合金を製造する方法。(9) A method for producing Al or an Al alloy according to claim 6 or 7, characterized in that the compression molded body of the powder is heated in dehumidified dry air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60032457A JPS61194101A (en) | 1985-02-20 | 1985-02-20 | Method for degassing al powder and al alloy powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60032457A JPS61194101A (en) | 1985-02-20 | 1985-02-20 | Method for degassing al powder and al alloy powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61194101A true JPS61194101A (en) | 1986-08-28 |
Family
ID=12359499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60032457A Pending JPS61194101A (en) | 1985-02-20 | 1985-02-20 | Method for degassing al powder and al alloy powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61194101A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993009899A1 (en) * | 1991-11-22 | 1993-05-27 | Sumitomo Electric Industries, Ltd | Method for degassing and solidifying aluminum alloy powder |
| US7625520B2 (en) * | 2003-11-18 | 2009-12-01 | Dwa Technologies, Inc. | Manufacturing method for high yield rate of metal matrix composite sheet production |
-
1985
- 1985-02-20 JP JP60032457A patent/JPS61194101A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993009899A1 (en) * | 1991-11-22 | 1993-05-27 | Sumitomo Electric Industries, Ltd | Method for degassing and solidifying aluminum alloy powder |
| US7625520B2 (en) * | 2003-11-18 | 2009-12-01 | Dwa Technologies, Inc. | Manufacturing method for high yield rate of metal matrix composite sheet production |
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