JPS6234818B2 - - Google Patents
Info
- Publication number
- JPS6234818B2 JPS6234818B2 JP1829384A JP1829384A JPS6234818B2 JP S6234818 B2 JPS6234818 B2 JP S6234818B2 JP 1829384 A JP1829384 A JP 1829384A JP 1829384 A JP1829384 A JP 1829384A JP S6234818 B2 JPS6234818 B2 JP S6234818B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- powder
- dispersed
- ceramic particles
- ceramic
- 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
Links
- 239000002245 particle Substances 0.000 claims description 28
- 239000000919 ceramic Substances 0.000 claims description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- 239000011812 mixed powder Substances 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Description
【発明の詳細な説明】
本発明はセラミツク粒子分散アルミニウム鋳造
合金の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing ceramic particle dispersed aluminum casting alloys.
最近、アルミニウムにセラミツク粒子を分散さ
せて種々の機械的性質を改善させた複合材料が開
発されている。 Recently, composite materials have been developed in which ceramic particles are dispersed in aluminum to improve various mechanical properties.
従来、その製造法としては、セラミツク粒子を
アルミニウム粉末に分散させた後、これを溶解す
る方法が行われている。しかし、この混合粉末を
そのまま溶解すると、通常セラミツク粒子は10μ
ｍ以下の微粒子が使用されるため、セラミツク微
粒子は分散せずに分離し、均一に分散したものは
得難い。従つて、その分離を防ぐために、
(1) これらの混合粉末をスチールボールと共に強
烈に混合して、アルミニウム粉末の中にセラミ
ツク粒子を埋め込んだ状態とした後溶解する方
法。（特開昭55―76033号公報）
(2) 混合粉を加圧機で圧縮して圧粉体を作り、こ
れを溶解する方法。（特開昭57―203733号公
報）
等が知られている。しかし、(1)の方法は特殊な混
練機を必要とするばかりでなく、混練時間も長く
必要とし、作業も非能率でコスト高となる欠点が
ある。(2)の方法は加圧機を必要とし、連続操業が
困難であり、十分に分散したものが得られない欠
点がある。 Conventionally, the manufacturing method has been to disperse ceramic particles in aluminum powder and then to dissolve the dispersion. However, when this mixed powder is dissolved as it is, the ceramic particles are usually 10 μm.
Since fine particles with a size of less than m are used, the ceramic fine particles are separated without being dispersed, making it difficult to obtain uniformly dispersed particles. Therefore, in order to prevent this separation, (1) A method of mixing these mixed powders intensively with a steel ball to form a state in which ceramic particles are embedded in aluminum powder and then melting the powder. (Japanese Unexamined Patent Publication No. 76033/1983) (2) A method in which mixed powder is compressed using a pressurizer to create a green compact, which is then melted. (Japanese Unexamined Patent Publication No. 57-203733) etc. are known. However, method (1) not only requires a special kneading machine, but also requires a long kneading time, and has the disadvantage of being inefficient and expensive. Method (2) requires a pressurizer, is difficult to operate continuously, and has the drawback that a sufficiently dispersed product cannot be obtained.
また、これらの方法に代え、アルミニウム溶湯
に撹拌しながら、セラミツク粒子を混合する方法
も知られている。例えば、セラミツク粒子はアル
ミニウム溶湯との濡れ性が悪いため、そのまま添
加したのでは分散し難いので、セラミツク粒子に
ニツケルメツキを施して添加している。この方法
ではメツキ装置を必要とし、且つ操業も複雑とな
ると共に、ニツケルも必要となり、コスト高とな
る欠点がある。しかも、この方法ではニツケルメ
ツキを施しても10μｍ以下のセラミツク微粒子の
分散は困難である。 In addition, instead of these methods, a method is also known in which ceramic particles are mixed into molten aluminum while stirring. For example, ceramic particles have poor wettability with molten aluminum and are difficult to disperse if added as is, so ceramic particles are added after being nickel-plated. This method requires a plating device, complicates the operation, and requires nickel, which has the disadvantage of increasing costs. Moreover, with this method, it is difficult to disperse ceramic fine particles of 10 μm or less even if nickel plating is applied.
本発明の目的は従来法の欠点を解消し、特殊の
装置を必要とせず、10μｍ以下のセラミツク微粒
子でも容易に、且つ均一に分散させたアルミニウ
ム鋳造合金の製造法を提供するにある。 An object of the present invention is to eliminate the drawbacks of conventional methods and to provide a method for producing an aluminum casting alloy in which even ceramic fine particles of 10 μm or less can be easily and uniformly dispersed without requiring special equipment.
本発明者らは前記目的を達成すべく鋭意研究の
結果、アルミニウム粉末とセラミツク粒子の混合
粉末を、撹拌しながら、昇温溶解すると、セラミ
ツク粒子がアルミニウム溶湯中に均一に容易に分
散することを知見した。それは、アルミニウム粉
末が溶解する過程で、撹拌羽根の機械的外力によ
り、半凝固状態のアルミニウム粉末にセラミツク
粒子が埋め込まれ、濡れ性の悪いセラミツク粒子
も溶湯に分散されるものと考えられる。 As a result of intensive research to achieve the above object, the present inventors have found that when a mixed powder of aluminum powder and ceramic particles is melted at an elevated temperature while stirring, the ceramic particles are easily and uniformly dispersed in the molten aluminum. I found out. It is thought that during the process of melting the aluminum powder, ceramic particles are embedded in the semi-solidified aluminum powder due to the external mechanical force of the stirring blade, and ceramic particles with poor wettability are also dispersed in the molten metal.
この知見に基いて本発明を完成したものであ
る。 The present invention was completed based on this knowledge.
本発明の要旨は、アルミニウム粉末とセラミツ
ク粒子の混合粉末を、撹拌しながら、昇温して溶
解させることを特徴とするセラミツク粒子分散ア
ルミニウム鋳造合金の製造法にある。 The gist of the present invention resides in a method for producing an aluminum casting alloy in which ceramic particles are dispersed, which is characterized in that a mixed powder of aluminum powder and ceramic particles is heated and melted while stirring.
本発明において使用するアルミニウム粉末の粒
径は10〜200μｍ程度のものが好ましい。セラミ
ツク粒子としては、例えば、Al2O3、SiO2、
Cr2O3等の粒子が挙げられる。しかし、これらに
限定されるものではなく、セラミツク粒子ならば
同様に使用することができる。その粒径は１〜
100μｍの広い範囲で使用し得られ、また、その
添加量は通常１〜30重量％である。 The particle size of the aluminum powder used in the present invention is preferably about 10 to 200 μm. Examples of ceramic particles include Al 2 O 3 , SiO 2 ,
Examples include particles such as Cr 2 O 3 . However, the material is not limited to these, and any ceramic particles can be used as well. Its particle size is 1~
It can be used in a wide range of 100 μm, and the amount added is usually 1 to 30% by weight.
昇温、溶湯時における撹拌は、撹拌羽根の回転
数100〜500rpm程度でよい。 Stirring during heating and molten metal may be performed at a stirring blade rotation speed of about 100 to 500 rpm.
溶解温度は700〜900℃、溶融保持時間は３〜
5minである。 Melting temperature is 700~900℃, melting holding time is 3~
It is 5min.
また、溶解までの時間が長い場合は、大気中で
はアルミニウム粉末の表面が酸化し、セラミツク
粒子の埋め込みが悪くなると共にアルミニウム溶
湯が得られなくなるので、酸化を防止するため、
雰囲気を不活性ガス雰囲気とすることが好まし
い。例えば、混合粉を真空で脱ガスし、次に窒素
ガス、アルゴンガスの不活性ガスで置換する。真
空は10-2mmHg程度でよい。また、溶解るつぼ内
も不活性ガスで置換する。また、雰囲気は真空で
あつてもよい。 In addition, if the time until melting is long, the surface of the aluminum powder will oxidize in the atmosphere, making it difficult to embed the ceramic particles and making it impossible to obtain molten aluminum.To prevent oxidation,
Preferably, the atmosphere is an inert gas atmosphere. For example, the mixed powder is degassed in a vacuum and then replaced with an inert gas such as nitrogen gas or argon gas. A vacuum of about 10 -2 mmHg is sufficient. Additionally, the inside of the melting crucible is also replaced with inert gas. Further, the atmosphere may be a vacuum.
本発明の方法を実施する装置の一態様を示すと
第１図の通りである。第１図は該装置の断面図
で、図中、１は黒鉛製溶解るつぼ、２はシール用
上蓋、３は混合粉用容器、４はステンレス製撹拌
羽根、５は不活性ガス（窒素）供給管、６はセラ
ミツク粒子分散アルミニウム溶湯、７はヒーター
を示す。その操業法は実施例において示す。 FIG. 1 shows one embodiment of an apparatus for carrying out the method of the present invention. Figure 1 is a cross-sectional view of the device, in which 1 is a graphite melting crucible, 2 is a sealing top, 3 is a container for mixed powder, 4 is a stainless steel stirring blade, and 5 is an inert gas (nitrogen) supply. A tube, 6 a ceramic particle-dispersed aluminum molten metal, and 7 a heater. Its operating method is shown in the examples.
実施例 １ 装置として第１図に示す装置を使用した。Example 1 The apparatus shown in FIG. 1 was used.
平均粒径100μｍの純アルミニウム粉末300ｇに
平均粒径10μｍの球状アルミナ微粉末を５〜20重
量％混合した。この混合粉を混合粉末容器３に入
れ、10-2mmHgに脱ガスし、窒素ガスで置換し
た。また、溶解るつぼ１内に窒素ガス供給管５か
ら窒素ガスを供給し、溶解るつぼ１の温度をヒー
ター７により加熱して800℃に昇温し、混合粉末
を混合粉末容器３から徐々に溶解るつぼ中に装入
した。同時にステンレス製撹拌羽根４を400rpm
の速度で回転させた。溶解が終了した後、これを
取出し、内径20mmの金型に鋳込んだ。 5 to 20% by weight of fine spherical alumina powder with an average particle size of 10 μm was mixed with 300 g of pure aluminum powder with an average particle size of 100 μm. This mixed powder was placed in a mixed powder container 3, degassed to 10 -2 mmHg, and replaced with nitrogen gas. Further, nitrogen gas is supplied into the melting crucible 1 from the nitrogen gas supply pipe 5, the temperature of the melting crucible 1 is heated to 800°C by the heater 7, and the mixed powder is gradually melted from the mixed powder container 3 into the crucible. I put it inside. At the same time, the stainless steel stirring blade 4 is set at 400 rpm.
rotated at a speed of After the melting was completed, it was taken out and cast into a mold with an inner diameter of 20 mm.
アルミナの分散状態は試料の断面を研磨して顕
微鏡写真で調べた。その写真は第２図の(1)，(2)に
示す通りであつた。なお、第２図の(1)はアルミナ
を５重量％分散させたとき、(2)はアルミナを20％
分散させたときを示す。（100倍の倍率）
実施例 ２
実施例１におけるアルミナ微粉末に代え、100
μｍの純アルミニウム粉末300ｇに平均粒径５μ
ｍのCr2O3粉末15重量％、及び平均粒径50μｍの
SiO2粉末15重量％をそれぞれ単独に添加した。 The state of dispersion of alumina was examined by polishing a cross section of the sample and using micrographs. The photographs were as shown in Figure 2 (1) and (2). Note that (1) in Figure 2 shows when 5% by weight of alumina is dispersed, and (2) shows when 20% alumina is dispersed.
Shows when dispersed. (100x magnification) Example 2 Instead of the alumina fine powder in Example 1, 100x
Average particle size of 5 μm in 300 g of μm pure aluminum powder
m Cr2O3 powder 15% by weight, and average particle size 50μm
15% by weight of SiO 2 powder was added individually.
また、雰囲気の窒素の代りにアルゴンガスを用
いて、他は実施例１と同様にセラミツク粒子分散
アルミニウム鋳造合金を作つた。その結果、
Cr2O3粉末及びSiO2粉末はそれぞれ第２図の(1)，
(2)に示すものと同様な分散状態のものが得られ
た。 Further, a ceramic particle-dispersed aluminum cast alloy was produced in the same manner as in Example 1 except that argon gas was used instead of nitrogen in the atmosphere. the result,
Cr 2 O 3 powder and SiO 2 powder are shown in (1) in Figure 2, respectively.
A dispersion state similar to that shown in (2) was obtained.
本発明の方法によると、従来法におけるような
特殊な混練機、加圧機を必要とせず、またニツケ
ルメツキ装置等も必要とせず、連続的に容易にセ
ラミツク粒子分散アルミニウム鋳造合金が得ら
れ、また10μｍ以下のセラミツク微粒子も容易に
分散されることができる優れた効果を奏し得られ
る。 According to the method of the present invention, an aluminum cast alloy with ceramic particles dispersed in it can be easily and continuously obtained without the need for a special kneader or pressurizer, or a nickel plating device, etc., as in the conventional method. The ceramic fine particles described below can also be easily dispersed and exhibit excellent effects.
第１図は本発明の方法を実施する装置の断面図
である。第２図は本発明の方法で得られたアルミ
ニウム合金の顕微鏡写真（100倍）で、(1)はアル
ミニウムに５重量％のアルミナを分散させたも
の、(2)は20重量％のアルミナを分散させたものを
示す。
１は黒鉛製溶解るつぼ、２はシール用上蓋、３
は混合粉用容器、４はステンレス製撹拌羽根、５
は不活性ガス供給管、６はセラミツク粒子分散ア
ルミニウム溶湯、７はヒーター。
FIG. 1 is a sectional view of an apparatus for carrying out the method of the invention. Figure 2 is a micrograph (100x magnification) of an aluminum alloy obtained by the method of the present invention, (1) is aluminum with 5% by weight alumina dispersed in it, and (2) is aluminum with 20% by weight alumina dispersed in it. Shows what has been dispersed. 1 is a graphite melting crucible, 2 is a sealing top cover, 3
is a container for mixed powder, 4 is a stainless steel stirring blade, and 5 is a container for mixed powder.
6 is an inert gas supply pipe, 6 is a ceramic particle-dispersed aluminum molten metal, and 7 is a heater.
Claims (1)
末を、撹拌しながら昇温して溶解させることを特
徴とするセラミツク粒子分散アルミニウム鋳造合
金の製造法。 ２ 不活性ガス雰囲気中で行う特許請求の範囲第
１項記載の製造法。[Scope of Claims] 1. A method for producing an aluminum casting alloy containing ceramic particles dispersed therein, which comprises heating and melting a mixed powder of aluminum powder and ceramic particles while stirring. 2. The manufacturing method according to claim 1, which is carried out in an inert gas atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1829384A JPS60162740A (en) | 1984-02-06 | 1984-02-06 | Production of aluminum casting alloy dispersed with ceramic particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1829384A JPS60162740A (en) | 1984-02-06 | 1984-02-06 | Production of aluminum casting alloy dispersed with ceramic particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60162740A JPS60162740A (en) | 1985-08-24 |
| JPS6234818B2 true JPS6234818B2 (en) | 1987-07-29 |
Family
ID=11967559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1829384A Granted JPS60162740A (en) | 1984-02-06 | 1984-02-06 | Production of aluminum casting alloy dispersed with ceramic particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60162740A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3553520B2 (en) * | 2001-04-19 | 2004-08-11 | 三菱重工業株式会社 | Method for producing radioactive substance storage member and billet for extrusion molding |
| CN106392099B (en) * | 2016-06-08 | 2018-08-31 | 昆明理工大学 | A kind of preparation method of aluminium oxide/aluminium composite superfine powder |
-
1984
- 1984-02-06 JP JP1829384A patent/JPS60162740A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60162740A (en) | 1985-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |