JPH03285885A - Coating material for preventing penetration of molten aluminum - Google Patents
Coating material for preventing penetration of molten aluminumInfo
- Publication number
- JPH03285885A JPH03285885A JP2085661A JP8566190A JPH03285885A JP H03285885 A JPH03285885 A JP H03285885A JP 2085661 A JP2085661 A JP 2085661A JP 8566190 A JP8566190 A JP 8566190A JP H03285885 A JPH03285885 A JP H03285885A
- Authority
- JP
- Japan
- Prior art keywords
- molten
- coating material
- molten aluminum
- coating
- cao
- 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
- 239000011248 coating agent Substances 0.000 title claims abstract description 29
- 238000000576 coating method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 17
- 230000035515 penetration Effects 0.000 title claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 title claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000004031 devitrification Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- -1 stalks Chemical compound 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はアルミニウム溶湯に対して優れた耐食性を有す
るとともに母材と強固に密着し、アルミニウム溶湯の浸
透を防止するためのコーティング材に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a coating material that has excellent corrosion resistance against molten aluminum, firmly adheres to a base material, and prevents penetration of molten aluminum.
アルミニウム溶湯を取り扱う各種部材、例えばストーク
、ラドル、浸漬ヒーター保護管、溶湯ポンプ部材、溶湯
撹拌用部材、トイ等の表面は使用中にアルミニウム溶湯
と接することにより、アルミニウム溶湯が徐々に浸透す
るという問題がある。そのため、従来はこれら部材表面
にコーティングを施し、アルミニウム溶湯との直接接触
を防止することが行われていた。そのためのコーティン
グ材として、従来はアルミナやチタニア等の粉末にバイ
ンダーを混ぜたもの、あるいはガラス質となる釉薬等が
用いられていた。The problem is that the surfaces of various parts that handle molten aluminum, such as stalks, ladles, immersion heater protection tubes, molten metal pump members, molten metal stirring members, toys, etc., come into contact with molten aluminum during use, causing the molten aluminum to gradually penetrate. There is. Therefore, conventionally, the surfaces of these members were coated to prevent direct contact with molten aluminum. Conventionally, the coating materials used for this purpose include powders such as alumina or titania mixed with a binder, or glazes that become glassy.
しかしながら、一般にアルミナやチタニア等の粉末をバ
インダーと混ぜたコーティング材はアルミニウム溶湯と
接触する部材表面に単に塗布するだけであるため、取り
扱い時に剥離してしまう問題点を有する。また、アルミ
ニウム溶湯湯面付近のコーティング膜に亀裂が生じるこ
とがあり、その結果として剥離してしまう問題を抱えて
いた。さらに、アルミニウム溶湯の流動によるコーティ
ングの摩耗も問題となっている。また、ガラス質となる
釉薬を用いる場合にはガラス質にするのにシリカを含有
するものが多く、アルミニウム溶湯と反応して浸透防止
効果に乏しく、さらにシリカを含有しないガラス質コー
ティング材の場合にはガラス化組成が限定されるため、
使用中の熱履歴による経時変化を受けて失透するという
問題点を有する。However, coating materials that are generally made by mixing a powder such as alumina or titania with a binder are simply applied to the surface of a member that comes into contact with molten aluminum, and therefore have the problem of peeling off during handling. In addition, cracks may occur in the coating film near the surface of the molten aluminum, resulting in the problem of peeling. Furthermore, wear of the coating due to the flow of molten aluminum has also become a problem. In addition, when using a glaze that becomes glassy, it often contains silica to make it glassy, and it reacts with molten aluminum and has a poor penetration prevention effect. Since the vitrification composition is limited,
It has the problem of devitrification due to changes over time due to thermal history during use.
本発明はアルミニウム溶湯との反応せず、アルミニウム
溶湯と接触する各種部材と強固に付着し、取り扱い時に
剥離することがなく、使用中に失透しないコーティング
材を提供することを目的とするものである。The object of the present invention is to provide a coating material that does not react with molten aluminum, firmly adheres to various parts that come into contact with molten aluminum, does not peel off during handling, and does not devitrify during use. be.
本発明は、アルミニウム溶湯に接する各種部材表面にガ
ラス化して被覆されるコーティング材において、Ａ Ｑ
、 Ｏ，： ６０〜９５ｗｔ％、Ｂ２０．：３〜２６
％ｌｔ％、ＣａＯ： １．５〜１３ｗｔ％からなること
を特徴とするコーティング材により、前記課題を達成し
たものである。The present invention is a coating material that is vitrified and coated on the surfaces of various members that come into contact with molten aluminum.
, O,: 60-95 wt%, B20. :3~26
%lt%, CaO: 1.5 to 13 wt%, the above object has been achieved.
本発明において、Ａｌ２Ｏ３９５ｗｔ％を越えると母材
への付着強度が弱くなる。逆にＡＱ２０３が６ｋｔ％未
満になるとガラスに富み、不均一な面状態（ブツブツが
出る）となる。In the present invention, when Al2O3 exceeds 95 wt%, the adhesion strength to the base material becomes weak. On the other hand, if AQ203 is less than 6 kt%, it will be rich in glass and the surface will be uneven (bumpy).
本発明ではＡＭ２０．、Ｂ２０．およびＣａＯの各成分
を特定の組成範囲としたため、ＡＱ、０３の一部と、Ｂ
２Ｏ３およびＣａＯとでガラス化し、母材表面に強固に
付着する。従って、上記組成からなるスリップをスプレ
ーあるいは刷毛でアルミニウム溶湯と接触する部材表面
に通常、２ｖｉｍ以下の厚みに塗布し、９００〜１００
０℃で加熱することにより、コーティング膜中にガラス
質を形成し、母材とより強固に結合したアルミナコーテ
ィングとすることができる。In the present invention, AM20. , B20. Since each component of CaO and CaO was set in a specific composition range, some of AQ, 03 and B
It vitrifies with 2O3 and CaO and firmly adheres to the surface of the base material. Therefore, the slip consisting of the above composition is usually applied by spray or brush to the surface of the member that will come into contact with molten aluminum to a thickness of 2vim or less.
By heating at 0° C., a glassy substance is formed in the coating film, and an alumina coating can be formed that is more firmly bonded to the base material.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
＊アルミナコーティングの作製
原料（Ａ Ｑ ２０． ： ８４ｖｔ％、Ｂ ｚ Ｏａ
： １１ｗｔ％およびＣａＯ：５ｗｔ％）、バインダ
ーおよび水をボールミル中で３時間湿式混合し、スリッ
プを作製した。このスリップを用い、スプレーガンによ
り１００℃に予熱した炭化珪素質の浸漬管に厚み１ｍｍ
に塗布し、コーティングを施した。このコーティングを
施した浸漬管を専用のガス炉にて９５０℃で１時間加熱
処理し、コーティングの一部をガラス化した。これによ
り浸漬管表面にアルミナを強固に結合したコーティング
を形成した。* Raw materials for producing alumina coating (A Q 20.: 84vt%, B z Oa
: 11 wt% and CaO: 5 wt%), binder and water were wet mixed in a ball mill for 3 hours to prepare a slip. Using this slip, apply it to a silicon carbide immersion tube preheated to 100°C with a spray gun to a thickness of 1 mm.
was applied and coated. The coated immersion tube was heat-treated at 950° C. for 1 hour in a special gas furnace to vitrify a portion of the coating. As a result, a coating in which alumina was firmly bonded was formed on the surface of the immersion tube.
木ガラスコーティングの効果
コーティングの付着効果を確認するため、本発明のコー
ティングを施した浸漬管と、通常のアルミナコーティン
グ（アルミナ９５％、粘土分５％）を施した浸漬管とを
アルミニウム溶湯中に浸漬し、表面を比較観察した。通
常のアルミナコーティングを施した浸漬管はバインダー
が燃えて、湯面付近のコーティングに亀裂が入り、部分
的に剥離してしまったが、本発明のコーティングはまっ
たく異常は認められなかった。Effect of wood glass coating In order to confirm the adhesion effect of the coating, a dipping tube coated with the present invention and a dipping tube coated with a normal alumina coating (95% alumina, 5% clay) were placed in molten aluminum. It was immersed and the surface was comparatively observed. In the case of a dipping tube coated with ordinary alumina, the binder burned and the coating near the hot water surface cracked and partially peeled off, but no abnormalities were observed with the coating of the present invention.
アルミニウム溶湯中に７５０℃、３０日間浸漬した後の
比較では、通常のアルミナコーティングはコーティング
を施さなかった浸漬管と大差がなかったのに対し、本発
明のアルミナコーティングは湯面付近の酸化物の付着が
少なく、アルミニウム浸透の防止効果が認められた。A comparison after immersion in molten aluminum at 750°C for 30 days showed that there was no significant difference between the conventional alumina coating and the uncoated immersion tube, whereas the alumina coating of the present invention reduced the amount of oxides near the molten metal surface. There was little adhesion, and the effect of preventing aluminum penetration was observed.
さらに、本発明のアルミナコーティングは母材との接合
強度が非常に強く、実際の取り扱い作業で剥がれる心配
がなく、取り扱いが非常に容易になった。Furthermore, the alumina coating of the present invention has a very strong bonding strength with the base material, and there is no fear that it will peel off during actual handling, making it extremely easy to handle.
以上のような本発明のコーティングは、アルミナを強固
に結合したガラス質皮膜を得ることができ、皮膜の剥離
、亀裂が殆どなく、取り扱い性に極めて優れ、アルミニ
ウム溶湯と接触する各種部材の寿命を大幅に延ばし得る
という効果を有する。The coating of the present invention as described above can obtain a vitreous film in which alumina is strongly bonded, has almost no peeling or cracking, is extremely easy to handle, and can extend the life of various parts that come into contact with molten aluminum. It has the effect of being able to be extended significantly.
Claims (1)
して被覆されるコーティング材において、Ａｌ＿２Ｏ＿
３：６０〜９５ｗｔ％、Ｂ＿２Ｏ＿３：３〜２６ｗｔ％
、ＣａＯ：１．５〜１３ｗｔ％からなることを特徴とす
る溶融アルミニウム浸透防止用コーティング材。1. In coating materials that are vitrified and coated on the surfaces of various parts that come into contact with molten aluminum, Al_2O_
3:60-95wt%, B_2O_3:3-26wt%
A coating material for preventing penetration of molten aluminum, characterized by comprising 1.5 to 13 wt% of CaO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085661A JP2947584B2 (en) | 1990-03-30 | 1990-03-30 | Coating material for preventing penetration of molten aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085661A JP2947584B2 (en) | 1990-03-30 | 1990-03-30 | Coating material for preventing penetration of molten aluminum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03285885A true JPH03285885A (en) | 1991-12-17 |
| JP2947584B2 JP2947584B2 (en) | 1999-09-13 |
Family
ID=13865012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2085661A Expired - Fee Related JP2947584B2 (en) | 1990-03-30 | 1990-03-30 | Coating material for preventing penetration of molten aluminum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2947584B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5316859A (en) * | 1992-03-30 | 1994-05-31 | Tocalo Co., Ltd. | Spray-coated roll for continuous galvanization |
| US5397650A (en) * | 1991-08-08 | 1995-03-14 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| US5472793A (en) * | 1992-07-29 | 1995-12-05 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| JP2007091585A (en) * | 2005-09-28 | 2007-04-12 | Snecma | Method for protecting cmc thermostructural part made from ceramic matrix composite material against wear, and coating and part obtained thereby |
| JP2008161880A (en) * | 2006-12-27 | 2008-07-17 | Mitsui Mining & Smelting Co Ltd | Stoke unit for casting |
-
1990
- 1990-03-30 JP JP2085661A patent/JP2947584B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397650A (en) * | 1991-08-08 | 1995-03-14 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| US5316859A (en) * | 1992-03-30 | 1994-05-31 | Tocalo Co., Ltd. | Spray-coated roll for continuous galvanization |
| US5472793A (en) * | 1992-07-29 | 1995-12-05 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| JP2007091585A (en) * | 2005-09-28 | 2007-04-12 | Snecma | Method for protecting cmc thermostructural part made from ceramic matrix composite material against wear, and coating and part obtained thereby |
| JP2008161880A (en) * | 2006-12-27 | 2008-07-17 | Mitsui Mining & Smelting Co Ltd | Stoke unit for casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2947584B2 (en) | 1999-09-13 |
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