JPS60200926A - Treatment for reforming aluminum alloy and device therefor - Google Patents
Treatment for reforming aluminum alloy and device thereforInfo
- Publication number
- JPS60200926A JPS60200926A JP5776884A JP5776884A JPS60200926A JP S60200926 A JPS60200926 A JP S60200926A JP 5776884 A JP5776884 A JP 5776884A JP 5776884 A JP5776884 A JP 5776884A JP S60200926 A JPS60200926 A JP S60200926A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- cylinder
- melt
- agent
- molten metal
- 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.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 20
- 238000002407 reforming Methods 0.000 title abstract 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 6
- 239000000155 melt Substances 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 3
- 239000011780 sodium chloride Substances 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- -1 NaCl and NaF Chemical class 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 235000013024 sodium fluoride Nutrition 0.000 description 2
- 239000011775 sodium fluoride Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はアルミニウム合金、例えばｋｌ−８ｉ合金など
の機械的特性全向上するために行なうアルミニウム合金
改良処理方法と、そのために使用される器具に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the mechanical properties of aluminum alloys, such as KL-8I alloys, and to equipment used for the process.
Ａ７−８ｉ合金の靭性等の機械的％性向上のため、共晶
及び亜共晶組成の合金の改良処理として、従来、金属ナ
トリウム又はナトツウム塩金主成分とした溶剤をＡＪ−
８ｉ合金の溶湯内に添加していた。In order to improve mechanical properties such as toughness of A7-8i alloy, as an improvement treatment for alloys with eutectic and hypoeutectic compositions, AJ-
It was added to the molten metal of 8i alloy.
しかしながら、金属ナトリウムの場合は、取扱いが危険
であると共に多量の白煙を発して作業環境が著しく悪化
していた。又、溶湯との反応が激しいために溶湯内にガ
スが多量に吸収され、さらに金属す） ＩＪウムの表面
の酸化物が溶湯内に分散して溶湯汚染の原因となり、こ
れによ！ｌｌ鋳造製品にハードスポラトラ増加させて、
欠陥を生じるという欠点があった。一方、ナトリウム塩
を主成分とした溶剤を使用した場合には、このような欠
点はないが、作業者の操作方法によっては溶湯内へのナ
トリウム量がばらつくことがおり、このため、予め必要
量以上のす） ＩＪウム量を添加するようにしているっ
しかしながら、このように添加されたす） ＩＪウム
塩にあっても、ナトリウム量が時間の経過に伴なって減
少するため最低必要量としてのナトリウム量（通常は約
２０ ｐｐ＋ｎ）を維持するのに３０分ないし６０分経
過ごとに再処理をする必要があシ、煩雑な作業となって
いた。又、このナトリウム塩処理によって溶湯表面にド
ロスが発生するため、この除去作業が必要であり、さら
には、アルミニウム合金の溶融に使用される黒鉛ルツボ
の内壁にナトリウム塩が拡散して付着するため、ルツボ
のに命も短かいものであった。However, in the case of metallic sodium, handling is dangerous and a large amount of white smoke is emitted, significantly deteriorating the working environment. In addition, due to the intense reaction with the molten metal, a large amount of gas is absorbed into the molten metal, and the oxides on the surface of the metal (IJ) disperse into the molten metal, causing contamination of the molten metal. ll increase hard sporatra to casting products,
It has the disadvantage of causing defects. On the other hand, when using a solvent with sodium salt as its main component, there is no such drawback, but the amount of sodium injected into the molten metal may vary depending on the operator's operating method. However, even in IJium salt, the amount of sodium decreases over time, so the minimum required amount is In order to maintain the amount of sodium (usually about 20 pp+n), it is necessary to perform reprocessing every 30 to 60 minutes, which is a complicated process. In addition, this sodium salt treatment generates dross on the surface of the molten metal, which must be removed.Furthermore, the sodium salt diffuses and adheres to the inner wall of the graphite crucible used for melting the aluminum alloy. Even though it was a crucible, its life was short.
本発明はこのような欠点を除去するためになされたもの
であり、耐熱性の筒体をアルミニウム合金の溶湯上に浮
かべ、この筒体内にナトリウム塩を主成分とした固形の
改良処理剤を添加して、該筒体内からナトリウム塩を溶
解して改良処理を行なうことに％徴としている。The present invention was made to eliminate these drawbacks, and involves floating a heat-resistant cylinder on a molten aluminum alloy, and adding a solid improving treatment agent mainly composed of sodium salt into the cylinder. Therefore, the improvement treatment is carried out by dissolving the sodium salt from the cylinder.
以下、本発明をさらに具体的に説明する。The present invention will be explained in more detail below.
本発明において、改良処理剤としてナトリウム塩を主成
分としだもｇ福用する。この改良処理剤としては、例え
ば、塩化ナトリウムとフッ化ナトリウムと全混合した粉
体状のものが使用され、その混合比としては塩化ナトリ
ウム４０〜６０部、フッ化す） ＩＪウム４０〜６０部
の範囲内で適宜、選択される。又、添加される形態とし
ては、粉体状だけでなく、顆粒状、塊状であってもよい
、このような改良処理剤をアルミニウム合金の溶湯に添
加するには 耐熱性の筒体が使用され、この筒体内に添
加せしめられる。この筒体はアルミニウム合金溶湯上に
浮かぶように該合金の比重よりも小さな軽質で、かつ、
高温下においても溶解、変形しない耐熱性の伺質から形
成され、例えば、セラミックファイバー、グラスファイ
バー、アスベスト等が選択される。この内、セラミック
ファイバーとしては、例えば商品名［ファインフレック
スにチアス社製）」が使用できる。又、筒体の形状とし
ては円筒、角筒、円錐筒、角錐筒を問わないが、アルミ
ニウム合金の溶湯に浮かんだ状態で転４４１１＋ １．
ないような寸法が好ましく、又、ルツボに対して約晃の
面積を有していることが好ましい。In the present invention, as an improved treatment agent, sodium salt is used as a main component. As this improving treatment agent, for example, a powder mixture of sodium chloride and sodium fluoride is used, and the mixing ratio is 40 to 60 parts of sodium chloride and 40 to 60 parts of sodium fluoride. It is selected as appropriate within the range. In addition, the form in which it is added may be not only in powder form but also in granular or lump form.A heat-resistant cylinder is used to add such improving treatment agents to molten aluminum alloy. , is added into this cylinder. This cylindrical body is light and has a specific gravity smaller than that of the molten aluminum alloy so that it floats on the molten aluminum alloy, and
It is formed from a heat-resistant material that does not melt or deform even at high temperatures, such as ceramic fiber, glass fiber, asbestos, etc. Among these, as the ceramic fiber, for example, the product name [Fineflex manufactured by Chias Co., Ltd.] can be used. The shape of the cylinder may be cylindrical, rectangular, conical, or pyramidal, but it can be rolled while floating in molten aluminum alloy.
Preferably, the crucible has dimensions such that it has no area, and it preferably has an area of about 100 cm with respect to the crucible.
第１図及び第２図はこの筒体を使用してアルミニウム合
金の改良処理を行なう場合を示しておシ、黒鉛ルツボ１
内に充填され、加熱炉２によって加熱溶融されたアルミ
ニウム合金の溶湯３上に短尺尻状の筒体４が浮かべられ
ている。そして、この筒体４内にはナトリウム塩を主成
分とした粉体状の改良処理剤５が所定量添加され、この
−１ま、溶湯３が放置される。このような状態において
は、改良処理剤は筒体内で湯温によって溶解して溶湯内
に滲透、拡散するため、必要なナトリウム量を溶湯内に
含有させることができる。このように溶解したす） Ｉ
Ｊウムは溶湯の内部で徐々に反応してアルミニウム合金
の改良が行なわれるが、この場合、湯面に接して溶融し
た改良処理剤は筒体内に隔離されており、該筒体の壁で
遮断されるため湯面と筒体下部の隙間から滲み出る程度
で湯面の表面上で拡散せず、ルツボ１の壁面には付着し
ないからルツボを長期間使用することができる。、又、
溶湯との接触度を多くするため従来から行なっていた攪
拌作業や挿入作業及びドロス除去作業を省略できるから
作業性が飛躍的に向上すると共に、溶湯内での反応も徐
々に進行するため、改良処理剤不足による経時ごとの再
処理も不要となる。さらに、鋳造のためルツボから溶湯
全湯汲みする場合にも、筒体を除いた他の箇所からでき
るからその作業の支障にもならない。なお、１笥体は複
数使用して処理することも可能であり、これにより、溶
湯の全面から均一に溶解させることができる。Figures 1 and 2 show the case where this cylinder is used to improve aluminum alloy.
A cylindrical body 4 in the shape of a short tail is floated on a molten aluminum alloy 3 which is filled in the inside and heated and melted in a heating furnace 2. Then, a predetermined amount of a powdered improving treatment agent 5 containing sodium salt as a main component is added into the cylinder 4, and the molten metal 3 is left to stand until -1. In such a state, the improving treatment agent is dissolved in the cylinder depending on the temperature of the water and permeates and diffuses into the molten metal, so that the necessary amount of sodium can be contained in the molten metal. Dissolved like this) I
Jum gradually reacts inside the molten metal to improve the aluminum alloy, but in this case, the improving treatment agent that melts in contact with the molten metal is isolated within the cylinder and is blocked by the wall of the cylinder. Therefore, the crucible can be used for a long period of time because it oozes out from the gap between the hot water surface and the lower part of the cylinder and does not spread on the hot water surface and does not adhere to the wall surface of the crucible 1. ,or,
In order to increase the degree of contact with the molten metal, the conventional stirring work, insertion work, and dross removal work can be omitted, which dramatically improves work efficiency, and the reaction within the molten metal progresses gradually, making it an improvement. There is no need for reprocessing over time due to lack of processing agent. Furthermore, even when the entire molten metal is pumped from the crucible for casting, it does not interfere with the work since it can be done from other locations other than the cylinder. Incidentally, it is possible to use a plurality of molten metals for processing, thereby making it possible to uniformly melt the molten metal from the entire surface.
第３図ないし第５図は、改良処理剤として、金属ナトリ
ウム’ｉ０．０１％μのへ度で溶湯中に添加した場合、
ナトリウム塩を主成分とした改質処理剤を溶湯量に対し
０．５ Ｗ／ｗチを溶湯中に添加した場合及びす） Ｉ
Ｊウム塩を主成分とした改良処理剤全溶湯＋ａに対し”
２５％％を筒体を使用して添加した場合の経時的減少
＋ａ′を測定したものである。いずれも、アルミニウム
合金としてＡＣ３Ａ合金を１５ ｋｇ使用し、処理温度
を７２０℃±１０℃に保って行なったものであり、第３
図及び第４図に示す従来方法が短時間で消費されている
のに比べ、本発明方法による第５図の場合はナトリウム
が長時間浴湯中に保存されている２、Figures 3 to 5 show that when metallic sodium 'i is added to the molten metal at a concentration of 0.01%μ as an improved treatment agent,
Cases in which 0.5 w/w of a modifying agent containing sodium salt as the main component is added to the molten metal) I
Improved treatment agent containing Jium salt as main component (for total molten metal + a)
The time-dependent decrease +a' was measured when 25%% was added using a cylinder. In both cases, 15 kg of AC3A alloy was used as the aluminum alloy, and the treatment temperature was maintained at 720°C ± 10°C.
Compared to the conventional method shown in Figs. and 4, in which sodium is consumed in a short time, in the case of the method of the present invention shown in Fig. 5, sodium is stored in the bath water for a long time2.
第１図及び第２図は本発明方法を示すｈフ［面図及び要
部の断面図、第３図ないし第５図は従来方法“及び本発
明方法にょるす） ＩＪウムの経時的消費率を示す特性
図である。
４・・・筒体、訃・・改良処理剤
特許出願人 永 １）−男
〃 大 山 幸 士
代理人 弁理士佐 藤 英 昭
一牙／１臼
だｔ２鴫
べFig. 1 and Fig. 2 show the method of the present invention. It is a characteristic diagram showing the rate. 4... Cylinder, body... Improved processing agent patent applicant Nagai 1) - Male Yukiji Oyama Agent Patent attorney Hide Sato Shoichiga / 1 mortar t2 Tsujibe
Claims (1)
べ、この筒体内にナトリウム塩を主成分とした固形の改
良処理剤全添加することを特徴とするアルミニウム合金
改良処理方法。 （２）アルミニウム合金の溶湯よシも比重が小さい耐熱
性の筒体であり、前記溶湯上に浮かべられることを％徴
とするアルミニウム合金改良処理用器具。 （３）前記筒体の材質がセラミックファイバーであるこ
とを特徴とする特許請求の範囲第（２）項記載のアルミ
ニウム合金改良処理用器具。[Scope of Claims] +11 A method for improving an aluminum alloy, which comprises floating a heat-resistant cylindrical body in a molten aluminum alloy, and completely adding a solid improving agent containing a sodium salt as a main component into the cylindrical body. (2) An apparatus for improving aluminum alloy, which is a heat-resistant cylinder with a low specific gravity and is floated on top of the molten metal. (3) The aluminum alloy improving treatment tool according to claim (2), wherein the material of the cylindrical body is ceramic fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5776884A JPS60200926A (en) | 1984-03-26 | 1984-03-26 | Treatment for reforming aluminum alloy and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5776884A JPS60200926A (en) | 1984-03-26 | 1984-03-26 | Treatment for reforming aluminum alloy and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60200926A true JPS60200926A (en) | 1985-10-11 |
Family
ID=13065052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5776884A Pending JPS60200926A (en) | 1984-03-26 | 1984-03-26 | Treatment for reforming aluminum alloy and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60200926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007528443A (en) * | 2003-11-19 | 2007-10-11 | コラス、テクノロジー、ベスローテン、フェンノートシャップ | Method for cooling molten metal during fractional crystallization |
-
1984
- 1984-03-26 JP JP5776884A patent/JPS60200926A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007528443A (en) * | 2003-11-19 | 2007-10-11 | コラス、テクノロジー、ベスローテン、フェンノートシャップ | Method for cooling molten metal during fractional crystallization |
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