JPH0247553B2 - - Google Patents
Info
- Publication number
- JPH0247553B2 JPH0247553B2 JP58107520A JP10752083A JPH0247553B2 JP H0247553 B2 JPH0247553 B2 JP H0247553B2 JP 58107520 A JP58107520 A JP 58107520A JP 10752083 A JP10752083 A JP 10752083A JP H0247553 B2 JPH0247553 B2 JP H0247553B2
- Authority
- JP
- Japan
- Prior art keywords
- boron nitride
- enamel
- nitride particles
- metal
- glaze
- 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 - Lifetime
Links
- 210000003298 dental enamel Anatomy 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 239000002245 particle Substances 0.000 claims description 33
- 229910052582 BN Inorganic materials 0.000 claims description 24
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 24
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000006060 molten glass Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
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、鉛のような低融点金属
溶湯、溶融ガラス、各種溶融塩等の高温溶融物に
接触させて用いられる高耐食性金属製品およびそ
の製造方法に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to highly corrosion-resistant metal products that are used in contact with high-temperature melts such as molten metals with low melting points such as aluminum and lead, molten glass, and various molten salts. The present invention relates to a manufacturing method thereof.
（従来技術）
アルミニウム精錬においてアルミニウム溶湯中
に塩素を吹込むために使用される吹精管やアルミ
ニウム溶湯中に浸漬される熱電対の保護管のよう
な低融点金属溶湯と接触させて使用される部材と
しては主としてステンレス鋼、石英管、黒鉛管等
が用いられてきた。ところが、ステンレス鋼は高
価であるうえに高温における耐食性が十分ではな
く、また、石英、黒鉛等は耐食性には優れている
反面高価でかつ折損し易い欠点があるため、近年
これらに代る材料として鋼板表面に琺瑯層を形成
した琺瑯引き金属製品が一部で使用されている。
しかしながら、このような琺瑯引き金属製品は琺
瑯層のピンホールから溶融金属が浸入して琺瑯層
を剥離させたり、琺瑯質を溶出させたりする恐れ
があるので長時間の使用に耐えず、耐食性及び耐
久性の面で満足できぬものがあり、また、使用後
に高温溶融物が冷却して付着残存するおそれもあ
つた。また、このような琺瑯製品の耐食性を高め
るためにはその製造工程において施釉、焼成を数
回繰返す必要があるので工程が複雑化して製造コ
ストが高くつく欠点があつた。(Prior art) As a member used in contact with a low melting point metal molten metal, such as a blowing tube used to blow chlorine into the molten aluminum in aluminum refining or a protective tube for a thermocouple immersed in the molten aluminum. Stainless steel, quartz tubes, graphite tubes, etc. have been mainly used. However, stainless steel is expensive and does not have sufficient corrosion resistance at high temperatures, while quartz, graphite, etc. have excellent corrosion resistance but are expensive and easily break, so in recent years, materials have been used to replace them. Enameled metal products, which have an enameled layer formed on the surface of a steel plate, are used in some products.
However, such enameled metal products cannot withstand long-term use because molten metal may enter through pinholes in the enamel layer and cause the enamel layer to peel off or elute the enamel. Some properties were unsatisfactory, and there was also a risk that the high-temperature molten material would cool down and remain attached after use. Furthermore, in order to improve the corrosion resistance of such enamel products, it is necessary to repeat glazing and firing several times in the manufacturing process, which has the disadvantage of complicating the process and increasing manufacturing costs.
（発明の目的）
本発明はこのような従来の問題点を解決してア
ルミニウム、鉛のような低融点金属溶湯のほか溶
融ガラス、溶融塩等の各種高温溶融物と接触した
状態で長時間使用することができる高耐食性金属
製品およびこの高耐食性金属製品を安価に量産す
ることのできる高耐食性金属製品の製造方法を目
的として完成されたものである。(Objective of the Invention) The present invention solves these conventional problems and enables long-term use in contact with various high-temperature melts such as molten glass and molten salt in addition to molten metals with low melting points such as aluminum and lead. This was completed with the aim of creating a highly corrosion-resistant metal product that can be used as a metal product, and a method for manufacturing a highly corrosion-resistant metal product that can be mass-produced at low cost.
（発明の構成）
本発明は、金属製の主体の少なくとも高温溶融
物と接する面に、粒径が100μm以下の無数の窒化
硼素粒子が0.7〜24％の面積比で表面に散着され
た琺瑯層を層着したことを特徴とする第１の発明
と、金属製の主体の少なくとも高温溶融物と接す
る面に琺瑯釉薬を施釉し、該琺瑯釉薬の乾燥前に
その表面に粒径が100μm以下の窒化硼素粒子を
0.7〜24％の面積比となるように吹付けた後乾燥、
焼成することを特徴とする第２の発明とよりなる
ものである。(Structure of the Invention) The present invention provides enamel in which countless boron nitride particles with a particle size of 100 μm or less are scattered on the surface of at least the surface of the main body made of metal that comes into contact with a high-temperature melt at an area ratio of 0.7 to 24%. A first invention characterized in that layers are deposited, and an enamel glaze is applied to at least the surface of a metal main body that comes into contact with a high-temperature melt, and the enamel glaze is coated on the surface with a particle size of 100 μm or less before drying. of boron nitride particles
After spraying to an area ratio of 0.7 to 24%, dry.
This invention consists of the second invention characterized in that it is fired.
本発明において使用される金属製の主体は低融
点金属の溶湯、溶融ガラス、溶融塩等の高温溶融
物と接触する面を有するパイプ、棒、タンク、
弁、コツク、樋、ポンプであつてその形状は問わ
ないが、鉄、ステンレス鋼、銅その他の耐熱性を
有する金属から常法により成形されるものであ
り、また、この表面に層着される琺瑯層を形成す
る琺瑯釉薬としては水分、アルコールのような分
散剤を含有させた普通釉あるいは耐食釉を用いる
ことができ、金属製の主体の少なくとも高温溶融
物と接触する面に常法により例えば0.1〜1.0mm程
度の厚みに施釉される。そして、施釉直後の琺瑯
釉薬中の水分等の分散剤が未だ蒸発せず釉薬が湿
潤状態にある間すなわち乾燥前にパウダーガン等
の適宜の粉粒体吹付機によつて琺瑯釉薬の表面に
窒化硼素粒子を吹付け法により散着する。窒化硼
素粒子としては粒径が100μmを越えると使用中に
粒子の脱落が生じ易いので、粒径が100μm以下の
ものが用いられ、琺瑯釉薬層の全表面積に対する
窒化硼素粒子部分の占める表面積が0.7〜24％程
度、好ましくは1.2〜11％程度となる分量を均等
に吹付ける。また窒化硼素粒子の面積比率は0.7
％以下では後述する耐久耐食効果が十分に得られ
ず、24％を越えると窒化硼素粒子の脱落を生じ易
くなる傾向を示す。吹付けられた窒化硼素粒子は
大部分が琺瑯釉薬表面に付着し、また、一部は琺
瑯釉薬内部に侵入するのでこれを常法により乾
燥、焼成すれば窒化硼素粒子は琺瑯層にその外表
面を強固に保持され、表面に無数の窒化硼素粒子
が散着された琺瑯層を金属製の主体の外表面の所
要部分に層着させることができる。なお、吹付後
の焼成は通常の外部加熱方式によるほか、高周波
誘導加熱手段を用いて金属素地を発熱させ、金属
素地側から表面方法へ向つて加熱を進行させる方
法によつても行なうことができる。 The metal main bodies used in the present invention include pipes, rods, tanks, etc., which have surfaces that come into contact with high-temperature melts such as molten metal, molten glass, and molten salt;
Valves, pots, gutters, and pumps of any shape are formed from iron, stainless steel, copper, or other heat-resistant metals by conventional methods, and are layered on the surface. As the enamel glaze that forms the enamel layer, ordinary glaze or corrosion-resistant glaze containing water and a dispersant such as alcohol can be used. It is glazed to a thickness of about 0.1 to 1.0 mm. Immediately after glazing, while the dispersant such as water in the enamel glaze has not yet evaporated and the glaze is still in a wet state, that is, before drying, the surface of the enamel glaze is nitrided using an appropriate powder spraying machine such as a powder gun. Boron particles are scattered by a spraying method. If the boron nitride particles have a particle size exceeding 100 μm, they tend to fall off during use, so those with a particle size of 100 μm or less are used, and the surface area occupied by the boron nitride particles relative to the total surface area of the enamel glaze layer is 0.7. Spray evenly in an amount of about ~24%, preferably about 1.2 to 11%. Also, the area ratio of boron nitride particles is 0.7
If it is less than 24%, the durable corrosion-resistant effect described below cannot be sufficiently obtained, and if it exceeds 24%, boron nitride particles tend to easily fall off. Most of the sprayed boron nitride particles adhere to the surface of the enamel glaze, and some penetrate into the interior of the enamel glaze, so if they are dried and fired using a conventional method, the boron nitride particles will be attached to the outer surface of the enamel layer. The enamel layer, which is firmly held and has countless boron nitride particles scattered on its surface, can be deposited on a desired portion of the outer surface of the metal main body. In addition to the usual external heating method, firing after spraying can also be carried out by using high-frequency induction heating means to generate heat in the metal base, and heating progresses from the metal base toward the surface. .
このようにして得られた製品は金属製の主体の
少なくとも高温溶融物と接する面に層着された琺
瑯層の表面に無数の微細な窒化硼素粒子が散着さ
れたものであり、琺瑯層の表面は溶融金属、溶融
ガラス、溶融塩等に対して安定でこれらに濡れた
り侵されたりすることのない窒化硼素粒子により
保護されているので琺瑯層が浸食されることがな
く、また、仮に琺瑯層にピンホールが存在したと
しても溶融金属等の高温溶融物は琺瑯層に濡らす
ことができないからピンホール内に侵入すること
がなく、従つて、琺瑯層が剥離したり琺瑯質が溶
出したりすることがなくなつて高温溶融物と接触
した状態で長時間使用することができ、また、石
英や黒鉛とは異なり素材が金属であるので折損の
おそれもなく、さらに、使用後に高温溶融物が表
面に付着し、これが冷却固化して残存するおそれ
もないので再使用上も便利である。しかして、こ
のような高耐食性金属製品を製造するには金属製
主体を成形後その少なくとも高温溶融物と接する
表面に琺瑯釉薬を施釉し、該琺瑯釉薬の乾燥前に
窒化硼素粒子を吹付け、乾燥、焼成を行なえばよ
いので一回の施釉、焼成により製造を行なうこと
ができるうえ、窒化硼素粒子を吹付けという簡略
な方法により釉薬層の表面に効率良く散着させる
ことができるので、複雑な製造工程を必要とせ
ず、また、窒化硼素粒子は比較的高価な材料であ
るが琺瑯層の所要部分の表面に散着するだけでよ
いので使用量はわずかで製造コストを低く押える
ことができる。 The product obtained in this way has countless fine boron nitride particles scattered on the surface of the enamel layer, which is layered on at least the surface in contact with the high-temperature melt of the metal main body. The surface is protected by boron nitride particles that are stable against molten metal, molten glass, molten salt, etc., and will not be wetted or attacked by these, so the enamel layer will not be eroded. Even if there are pinholes in the layer, high-temperature melts such as molten metal cannot wet the enamel layer, so they will not penetrate into the pinholes, and the enamel layer will peel off or the enamel material will dissolve. It can be used for a long time in contact with high-temperature molten materials, and unlike quartz or graphite, it is made of metal so there is no risk of breakage. It is also convenient for reuse since there is no risk that it will stick to the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface. Therefore, in order to manufacture such a highly corrosion-resistant metal product, after forming a metal main body, apply an enamel glaze to at least the surface that comes into contact with the high-temperature melt, and before drying the enamel glaze, spray boron nitride particles. Drying and firing are all you need to do, so manufacturing can be done in a single glaze and firing process.In addition, boron nitride particles can be efficiently scattered on the surface of the glaze layer by a simple method of spraying, making it difficult to manufacture. Although boron nitride particles are a relatively expensive material, they only need to be scattered on the surface of the required parts of the enamel layer, so the amount used is small and manufacturing costs can be kept low. .
（実施例）
アルミニウム精錬においてアルミニウム溶湯中
に塩素を吹込むために使用される長さ4m、内径
30mm、肉厚４mmの鉄鋼製パイプの表面に分散剤と
して水分を含有させた普通組成の琺瑯釉薬を厚さ
が0.5mmとなるよう施釉し、この琺瑯釉薬が湿潤
状態にある間に粒径が100μm以下の窒化硼素粒子
を表面に手動パウダーガンにより全面的に均一に
吹付けた。このときの手動パウダーガンの輸送圧
は約２Kg／cm2、窒化硼素粒子の流量は毎分200gr
であり、釉薬層の表面積に対する窒化硼素粒子の
表面積は約５％であつた。次いで、これを常法に
より乾燥、焼成した結果、表面に窒化硼素粒子が
散着された琺瑯層が鉄鋼製パイプの外表面に形成
された。このようにして得られた吹精管は従来の
耐熱琺瑯製の吹精管が約160時間しか使用できな
かつたのに対し400時間にわたり使用することが
できた。(Example) Length 4m, inner diameter used for blowing chlorine into molten aluminum in aluminum refining
Enamel glaze of normal composition containing water as a dispersant is applied to the surface of a steel pipe with a diameter of 30 mm and a wall thickness of 4 mm to a thickness of 0.5 mm.While the enamel glaze is in a wet state, the particle size is Boron nitride particles of 100 μm or less were uniformly sprayed onto the surface using a manual powder gun. At this time, the transport pressure of the manual powder gun was approximately 2Kg/cm 2 , and the flow rate of boron nitride particles was 200gr/min.
The surface area of the boron nitride particles was approximately 5% of the surface area of the glaze layer. Next, this was dried and fired by a conventional method, and as a result, an enamel layer with boron nitride particles scattered on the surface was formed on the outer surface of the steel pipe. The blown sperm tube thus obtained could be used for 400 hours, whereas the conventional blown tube made of heat-resistant enamel could only be used for about 160 hours.
（発明の効果）
前記説明から明らかなように、第１の発明は金
属製の主体の少なくとも高温溶融物と接する面を
粒径が100μm以下の無数の窒化硼素粒子が0.7〜
24％の面積比で表面に散着された琺瑯層により保
護したので、表面の窒化硼素粒子により琺瑯層が
高温溶融物により濡れたり侵されることがなくな
つて耐食性、耐久性に優れたものとなり、また、
第２の発明は金属製の主体を成形後その表面に常
法により琺瑯釉薬を施釉し、その乾燥前に窒化硼
素粒子を吹き付け、これを乾燥させて焼成すれば
よく、従来の琺瑯引き金属製品の製造工程中に窒
化硼素粒子の吹付け工程を付加するだけでよいの
で、製作が容易で安価に量産できる利点があり、
従来の高耐食性金属製品およびその製造方法の問
題点を解決したものとして業界の発展に寄与する
ところ極めて大なものである。(Effects of the Invention) As is clear from the above description, the first invention is such that countless boron nitride particles with a particle diameter of 100 μm or less are formed on at least the surface of the metal main body that comes into contact with the high-temperature melt.
Since it is protected by an enamel layer scattered on the surface with an area ratio of 24%, the enamel layer is not wetted or attacked by high temperature melt due to the boron nitride particles on the surface, resulting in excellent corrosion resistance and durability. ,Also,
The second invention is to form a metal main body, apply enamel glaze to its surface by a conventional method, spray boron nitride particles before drying, dry and fire it, and it is possible to make a conventional enameled metal product. Since it is only necessary to add a step of spraying boron nitride particles during the manufacturing process, it has the advantage of being easy to manufacture and mass-produced at low cost.
This is an extremely significant contribution to the development of the industry as it solves the problems of conventional highly corrosion-resistant metal products and their manufacturing methods.
Claims (1)
る面に、粒径が100μm以下の無数の窒化硼素粒子
が0.7〜24％の面積比で表面に散着された琺瑯層
を層着したことを特徴とする高耐食性金属製品。 ２ 金属製の主体の少なくとも高温溶融物と接す
る面に琺瑯釉薬を施釉し、該琺瑯釉薬の乾燥前に
その表面に粒径が100μm以下の窒化硼素粒子を
0.7〜24％の面積比となるように吹付けた後乾燥、
焼成することを特徴とする高耐食性金属製品の製
造方法。[Scope of Claims] 1. An enamel layer in which countless boron nitride particles with a particle size of 100 μm or less are scattered on the surface at an area ratio of 0.7 to 24% at least on the surface of the metal main body that comes into contact with the high-temperature melt. A highly corrosion-resistant metal product characterized by a layered structure. 2 Enamel glaze is applied to at least the surface of the metal main body that comes into contact with the high-temperature melt, and boron nitride particles with a particle size of 100 μm or less are applied to the surface before drying of the enamel glaze.
After spraying to an area ratio of 0.7 to 24%, dry.
A method for manufacturing highly corrosion-resistant metal products, which comprises firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10752083A JPS59232272A (en) | 1983-06-15 | 1983-06-15 | Metallic product having high corrosion resistance and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10752083A JPS59232272A (en) | 1983-06-15 | 1983-06-15 | Metallic product having high corrosion resistance and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59232272A JPS59232272A (en) | 1984-12-27 |
| JPH0247553B2 true JPH0247553B2 (en) | 1990-10-22 |
Family
ID=14461276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10752083A Granted JPS59232272A (en) | 1983-06-15 | 1983-06-15 | Metallic product having high corrosion resistance and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59232272A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE269913T1 (en) * | 2002-07-31 | 2004-07-15 | Itn Nanovation Gmbh | CERAMIC COATING FOR COMBUSTION BOILERS |
| US8297091B2 (en) * | 2009-06-03 | 2012-10-30 | GM Global Technology Operations LLC | Nanocomposite coating for hot metal forming tools |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5749110A (en) * | 1980-09-08 | 1982-03-20 | Fujikura Ltd | Aluminum transmission line |
-
1983
- 1983-06-15 JP JP10752083A patent/JPS59232272A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5749110A (en) * | 1980-09-08 | 1982-03-20 | Fujikura Ltd | Aluminum transmission line |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59232272A (en) | 1984-12-27 |
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