JPH0244898B2 - - Google Patents
Info
- Publication number
- JPH0244898B2 JPH0244898B2 JP61126320A JP12632086A JPH0244898B2 JP H0244898 B2 JPH0244898 B2 JP H0244898B2 JP 61126320 A JP61126320 A JP 61126320A JP 12632086 A JP12632086 A JP 12632086A JP H0244898 B2 JPH0244898 B2 JP H0244898B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- mixture
- moisture
- thermal
- core
- 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
Landscapes
- Coating By Spraying Or Casting (AREA)
Description
〔産業上の利用分野〕
本発明は、セラミツク溶射線で、特に可撓性の
あるセラミツク溶射線に関する。
〔従来技術とその問題点〕
現在国内で市販されている可撓性のあるセラミ
ツク溶射線は、溶射線本体（以後コアと云う）の
外周面に水溶性樹脂を主体とする混和物により外
被を設けてなるものであるが、外被が水溶性樹脂
であるため、生産後、多湿環境で保管すると外被
を通してコアが吸湿する。
この様に、溶射線が吸湿すると、溶射時に、そ
の吸湿水分による気化潜熱が取られ、必要以上の
熱エネルギーが必要となり、溶射面の品質低下の
原因となる。
また、溶射は通常、溶射ガンで行なわれ、第３
図に示すように、送りローラ１０により、溶射線
ａをノズル１１内を送り、その先端を火炎１２に
より加熱して溶融させるとともに、噴出する燃焼
ガスと共に溶融したセラミツクスを対象物に溶着
するものであるが、前記のように、溶射線ａが吸
湿して柔く且つ脆くなると、送りローラ１０のロ
ーレツト面が詰まつて送りが不正確となり、溶射
量が変動して均一な溶射面を得ることができない
問題がある。
さらに、ノズル１１の開口と溶射線ａの間にカ
ーボンが溜まると、バツクフアイア（逆火）が生
じ易い。このカーボン付着は、前記ノズル開口と
溶射線ａの間〓ｔ等に関係し、この間〓が適当で
ない（通常、広くなると）と生じ易く、前記のよ
うに、吸湿していると、溶射線ａの外径が変化し
易く不均一となり、前記間〓ｔが変化してカーボ
ン付着が進む。このため、従来の溶射線ａでは、
しばしばバツクフアイアが生じている。このバツ
クフアイアは、作業上において非常に危険な現象
である。
また、従来のものは、コアの結合材にカルボキ
シメチルセルロースと用いており、ナトリウムイ
オンを持つているため、溶射表面が炭化黒変する
問題もある。
〔発明の目的〕
本発明は、上記問題点に留意し、吸湿を防止す
るとともに、溶射表面の炭化黒変をなくしたセラ
ミツク溶射線を提供することを目的とする。
〔目的を達成するための手段〕
上記目的を達成するため、本発明にあつては、
セラミツク微粉体と、非イオン性結合剤、可塑
剤、滑剤、水および必要に応じ加工助剤、着色料
を混練りして得た混和物を線状に成形してコアと
し、このコアの外周に、水に溶けない樹脂混和物
からなる防湿層を設けたセラミツク溶射線とした
のである。
上記セラミツクとしては、アルミナ、チタニ
ア、ジルコニア、マグネシア、シリカ、カルシ
ア、イツトリア、タングステンカーバイト、クロ
ムカーバイト等の一種又は二種以上の混合物が挙
げられる。
ここで、マグネシア、カルシア、イツトリアは
溶射面の安定剤としてよく使用される。また、共
晶セラミツクを用いる場合は単位より低い融点の
ものを得ることができる。
微粉体は10〜60μの範囲で任意に選択使用でき
るが、径が小さい場合は溶射時に素材が飛散する
率が高くなるが、溶射面は滑らかで気孔が小さく
なり、一方、径が大きくなると素材の飛散率が低
くなり、密着強度、作業性が向上する反面、溶射
面が粗く気孔も大きくなるので、それらを考慮し
て使用目的に合わせて選択すれば良い。
上記結合剤は溶射時の熱エネルギーによつて揮
散する必要があり、熱エネルギーによつて反応固
形物が生成し、これがセラミツクと共に飛んで溶
射面に混入するものであつてはならず、例えば、
メチルセルロース、ヒドロキシエチルセルロー
ス、カルボキシメチルセルロース、ヒドロキシエ
チルメチルセルロース、ヒドロキシプロピルメチ
ルセルロースの一種又は二種以上の混合物から成
るセルロース誘導体が挙げられる。
上記可塑剤、滑剤、加工助剤は、結合剤と同様
に、溶射時の熱エネルギーによつて揮散する必要
があり、可塑剤としては、例えば、第１工業薬品
株式会社製：品番Ｇ−4716等のポリオール系可塑
剤を、滑剤としては、例えば、第１工業薬品株式
会社製：品番Ｇ−7203等のステアリン酸エマルジ
ヨンを、加工助剤としては、例えばグリセリン
を、それぞれ挙げることができる。
上記防湿層としては、例えば、エチルセルロー
スに、キシレン、トルエン等の芳香族系の溶剤70
〜90％にアルコール類10〜30％を加えたものを混
和した物で成す。溶剤としては、上記の他、エス
テル類、ケトン類などを単独又は二種類以上混合
して使用できる。このとき、可塑剤、例えば
DOP、DBP、TCP等を適宜に添加する。この防
湿層を成す混和物は溶射時の熱で完全に気化する
ようなもので構成する。
〔作用〕
この様に構成される本発明にあつては、生産
後、外被が防湿層となつているため、吸湿するこ
となく、軟化、脆化せず、溶射時の気化潜熱が極
少となる。また、吸湿による外径変化もないた
め、溶射ガンの溶射線通孔におけるバツクフアイ
ア現象も抑制される。
〔実施例〕
以下、本発明の実施例を添付図面に基づいて説
明する。
下記配合表にもとづいて、可塑剤、加工助剤、
滑剤、水および結合剤を槽中に投入してよく混練
した後、セラミツク微粉末を徐々に加えて針入度
約70（150ｇ荷重）の混和物を得る。
上記の如く得られた混和物を押出成形機のホツ
パーに投入し、該混和物に約３Kg／cm2の圧力を加
えながら内径５mmのダイスにより押出成形し、こ
れを乾燥してコア１を得る。
上記コア１を下記外被用配合表に基づき防湿層
用樹脂混和物を調整し、常温の混和物浴中に浸せ
きし、２ｍ／minの速さで垂直に引取り乾燥して
0.15mm厚の防湿層（外被）２を設けて、第１図に
示す本発明のセラミツク溶射線ａを得た。
[Industrial Field of Application] The present invention relates to a ceramic spray wire, and particularly to a flexible ceramic spray wire. [Prior art and its problems] Flexible ceramic sprayed wires currently on the market in Japan have a coating on the outer circumferential surface of the sprayed wire body (hereinafter referred to as core) with a mixture mainly composed of water-soluble resin. However, since the outer cover is made of water-soluble resin, if it is stored in a humid environment after production, the core absorbs moisture through the outer cover. In this way, when the thermal spray line absorbs moisture, the latent heat of vaporization due to the absorbed moisture is removed during thermal spraying, and more thermal energy than necessary is required, causing a deterioration in the quality of the sprayed surface. In addition, thermal spraying is usually performed with a thermal spray gun, and a third
As shown in the figure, a spray wire a is sent through a nozzle 11 by a feed roller 10, and its tip is heated and melted by a flame 12, and the molten ceramic is welded to the object together with the ejected combustion gas. However, as mentioned above, when the sprayed wire a absorbs moisture and becomes soft and brittle, the knurled surface of the feed roller 10 becomes clogged and feeding becomes inaccurate, and the spray amount fluctuates, making it difficult to obtain a uniform sprayed surface. I have a problem where I can't. Furthermore, if carbon accumulates between the opening of the nozzle 11 and the spray line a, backfire is likely to occur. This carbon adhesion is related to the distance between the nozzle opening and the thermal spray line a, and is likely to occur if the distance between the nozzle opening and the thermal spray line a is inappropriate (usually when it becomes wide). The outer diameter of the carbon fiber tends to change and becomes non-uniform, and the distance t changes and carbon adhesion progresses. For this reason, with the conventional thermal spray line a,
Backfire often occurs. This backfire is a very dangerous phenomenon during work. In addition, conventional products use carboxymethyl cellulose as the core binding material, which contains sodium ions, which causes the problem of carbonization and blackening of the sprayed surface. [Object of the Invention] The present invention takes into account the above-mentioned problems, and aims to provide a ceramic thermal spray wire that prevents moisture absorption and eliminates blackening of the thermally sprayed surface. [Means for achieving the object] In order to achieve the above object, the present invention includes the following:
A mixture obtained by kneading ceramic fine powder, a nonionic binder, a plasticizer, a lubricant, water and, if necessary, a processing aid and a coloring agent, is formed into a linear core, and the outer periphery of this core is formed into a core. In addition, the ceramic spray wire was provided with a moisture-proof layer made of a water-insoluble resin mixture. Examples of the ceramic include one or a mixture of two or more of alumina, titania, zirconia, magnesia, silica, calcia, yttoria, tungsten carbide, chromium carbide, and the like. Here, magnesia, calcia, and ittria are often used as stabilizers for sprayed surfaces. Furthermore, when using a eutectic ceramic, one with a melting point lower than that of the unit can be obtained. The fine powder can be arbitrarily selected and used within the range of 10 to 60μ, but if the diameter is small, the rate of material scattering during thermal spraying will be high, but the sprayed surface will be smooth and the pores will be small.On the other hand, if the diameter is large, the material will scatter. While this reduces the scattering rate and improves adhesion strength and workability, it also makes the sprayed surface rougher and has larger pores, so these should be taken into consideration when selecting a material according to the purpose of use. The above-mentioned binder must be volatilized by the thermal energy during thermal spraying, and the thermal energy must not generate reactive solids that fly away with the ceramic and mix into the thermal spraying surface. For example,
Examples include cellulose derivatives consisting of one type or a mixture of two or more of methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, hydroxyethylmethylcellulose, and hydroxypropylmethylcellulose. The above plasticizer, lubricant, and processing aid, like the binder, need to be volatilized by thermal energy during thermal spraying, and examples of plasticizers include, for example, product number G-4716 manufactured by Daiichi Kogyo Yakuhin Co., Ltd. Examples of the lubricant include stearic acid emulsion such as product number G-7203 manufactured by Daiichi Kogyo Yakuhin Co., Ltd., and examples of the processing aid include glycerin. For the moisture-proof layer, for example, an aromatic solvent such as xylene or toluene may be added to ethyl cellulose.
It is made by mixing ~90% alcohol with 10~30% alcohol. As the solvent, in addition to the above, esters, ketones, etc. can be used alone or in combination of two or more. At this time, a plasticizer, e.g.
Add DOP, DBP, TCP, etc. as appropriate. The mixture forming this moisture barrier layer is made of a material that completely vaporizes due to the heat during thermal spraying. [Function] In the case of the present invention constructed in this way, after production, the outer covering becomes a moisture-proof layer, so it does not absorb moisture, does not soften or become brittle, and has minimal latent heat of vaporization during thermal spraying. Become. Furthermore, since there is no change in the outer diameter due to moisture absorption, the backfire phenomenon in the thermal spraying wire passage of the thermal spraying gun is also suppressed. [Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings. Based on the formulation table below, plasticizers, processing aids,
After putting the lubricant, water and binder into a tank and kneading them well, fine ceramic powder is gradually added to obtain a mixture with a penetration of about 70 (150 g load). The mixture obtained as above is put into the hopper of an extrusion molding machine, and the mixture is extruded using a die with an inner diameter of 5 mm while applying a pressure of about 3 kg/cm 2 , and this is dried to obtain core 1. . The above core 1 was prepared with a resin mixture for the moisture-proof layer based on the formulation table for the outer coating below, immersed in a mixture bath at room temperature, and then taken up vertically at a speed of 2 m/min to dry.
A moisture-proof layer (outer covering) 2 having a thickness of 0.15 mm was provided to obtain a ceramic sprayed wire a of the present invention shown in FIG.
得られた溶射線ａを相対湿度70％の部屋に1hr
放置し、これを取り出して酸素・アセチレン炎溶
射ガンにセツトし、グレーアルミナ（Al2O3：96
％、TiO：2.7％、SiO2：0.6％、MgO：0.12％、
CaO：0.12％）については約2100℃、ジルコニア
（ZiO2：69％、CaO：31％）については約2450℃
に溶射炎の温度を調整し、ブラスト加工した鉄材
（SS41）（0.1μのNi−Cr−Al、Ni−Al等のNi基
合金をアンダーコーテング）の表面に溶射した。
一方、防湿性でない外被を有する従来品も同一
に処理して溶射ガンにセツトして同様の条件下で
前記鉄材の表面に溶射し、両溶射線を用いた溶射
面を比較検討した結果を下表に示す。
The obtained thermal spray beam a was placed in a room with a relative humidity of 70% for 1 hour.
Then, take it out, set it in an oxygen/acetylene flame spray gun, and spray it with gray alumina (Al 2 O 3 : 96
%, TiO: 2.7%, SiO2 : 0.6%, MgO: 0.12%,
Approximately 2100℃ for zirconia (ZiO 2 : 69%, CaO: 31%) and approximately 2450℃ for zirconia (ZiO 2 : 69%, CaO: 31%)
The temperature of the spraying flame was adjusted and sprayed onto the surface of a blasted iron material (SS41) (undercoated with 0.1μ of Ni-based alloys such as Ni-Cr-Al and Ni-Al). On the other hand, a conventional product with a non-moisture-proof outer cover was also treated in the same manner, set in a thermal spray gun, and sprayed on the surface of the above-mentioned iron material under the same conditions, and the results of a comparative study of the sprayed surfaces using both thermal spray lines are as follows. Shown in the table below.
前記試験と同様にして製作した本発明に係る溶
射線及び従来の溶射線を、前記第３図に示した溶
射ガンにセツトして、下記の同一条件で溶射し、
使用後のノズル１１先端のカーボンの付着状況を
観察すると本発明品の方が溶射後のカーボン付着
量が少なかつた。
溶射線外径：4.76mm
外被（防湿層）厚：0.2mm
ノズル径：4.9mm
間〓ｔ：0.07mm
何故、本発明品のカーボン付着が少ないかにつ
いて検討するに、両者間の構成上の違いは外被に
あり、本発明品及び従来品の外彼を剥ぎ取り熱天
びんで分析すると、第２図ａ，ｂの結果を得た
（ａが本発明品、ｂが従来品）。
これによると従来品は、100℃で可成の減量、
即ち水が揮散し外被２がやせていることを示し、
本発明品は100℃では殆ど減量していないことを
示している。この差が前記カーボン付着量の差に
なつているものと考えられ、この差はバツクフア
イアの発生可能性の差に結び付く。
また、溶射作業後、溶射ガンの送りローラのロ
ーレツトの目詰りについて見ると、従来品を使用
したものは目詰りしているのに対し、本発明品を
使用したものは目詰りはなく、これからも均一な
溶射ができていることを示している。
〔発明の効果〕
以上説明した如く本発明は、外被を防湿層と
し、溶射面の品質を改良し、溶射線の機械的特
性、安全性を向上させたものである。
The thermal spray wire according to the present invention and the conventional thermal spray wire manufactured in the same manner as in the above test were set in the thermal spray gun shown in FIG. 3, and thermal sprayed under the same conditions below.
Observing the state of carbon adhesion at the tip of the nozzle 11 after use, it was found that the product of the present invention had less carbon adhesion after thermal spraying. Thermal spray wire outer diameter: 4.76mm Outer cover (moisture-proof layer) thickness: 0.2mm Nozzle diameter: 4.9mm Interval = 0.07mm When considering why the carbon adhesion of the product of the present invention is less, it is important to note that The difference lies in the outer covering, and when the outer covering of the product of the present invention and the conventional product was peeled off and analyzed using a thermal balance, the results shown in Figure 2 a and b were obtained (a is the product of the present invention, b is the conventional product). According to this, the conventional product loses a considerable amount of weight at 100℃.
In other words, water has evaporated and the outer covering 2 has become thinner.
The product of the present invention shows almost no weight loss at 100°C. This difference is considered to be the difference in the amount of carbon attached, and this difference is linked to the difference in the possibility of generating backup fire. Furthermore, when we look at the clogging of the feed roller knurling of the thermal spray gun after thermal spraying work, we found that the knurls of the feed roller of the thermal spray gun were clogged when using the conventional product, but there was no clogging when using the product of the present invention. This also shows that uniform thermal spraying was achieved. [Effects of the Invention] As explained above, the present invention uses the outer cover as a moisture-proof layer, improves the quality of the sprayed surface, and improves the mechanical properties and safety of the sprayed wire.
第１図は、本発明に係るセラミツク溶射線の一
実施例の横断図、第２図ａ，ｂは本発明品及び従
来品の外被の熱分析図、第３図は溶射ガンの概略
図である。
１……コア、２……防湿層（外被）、３……本
発明品の熱分析曲線、４……従来品の熱分析曲
線。
Fig. 1 is a cross-sectional view of one embodiment of the ceramic spray wire according to the present invention, Fig. 2 a and b are thermal analysis diagrams of the outer jackets of the inventive product and the conventional product, and Fig. 3 is a schematic diagram of the thermal spray gun. It is. 1... Core, 2... Moisture-proof layer (outer covering), 3... Thermal analysis curve of the product of the present invention, 4... Thermal analysis curve of the conventional product.
Claims (1)
塑剤、滑剤、水および必要に応じ加工助剤、着色
料を混練りして得た混和物を線状に成形してコア
とし、このコアの外周に、水に溶けない樹脂混和
物からなる防湿層を設けたことを特徴とするセラ
ミツク溶射線。 ２ 上記セラミツクが、アルミナ、チタニア、ジ
ルコニア、マグネシア、シリア、カルシア、イツ
トリア、タングステンカーバイト、クロムカーバ
イト等の一種又は二種以上の混合物から成ること
を特徴とする特許請求の範囲第１項に記載のセラ
ミツク溶射線。 ３ 上記結合剤がセルロース誘導体である特許請
求の範囲第１項又は第２項に記載のセラミツク溶
射線。 ４ 上記セルロース誘導体が、メチルセルロー
ス、ヒドロキシエチルセルロース、ヒドロキシプ
ロピルメチルセルロース、カルボキシメチルセル
ロースの一種又は二種以上の混合物から成ること
を特徴とする特許請求の範囲第３項に記載のセラ
ミツク溶射線。 ５ 上記樹脂混和物が、エチルセルロースに、キ
シレン、トルエン又はこれ等の混合物にアルコー
ルを加えて混和したものであることを特徴とする
特許請求の範囲第１項乃至第４項のいずれかに記
載のセラミツク溶射線。[Scope of Claims] 1 A mixture obtained by kneading ceramic fine powder, a nonionic binder, a plasticizer, a lubricant, water, and if necessary a processing aid and a coloring agent is formed into a linear shape. A ceramic thermal spray wire characterized by having a core and a moisture-proof layer made of a water-insoluble resin mixture around the core. 2. Claim 1, wherein the ceramic is made of one or a mixture of two or more of alumina, titania, zirconia, magnesia, syria, calcia, yttoria, tungsten carbide, chromium carbide, etc. Ceramic sprayed wire as described. 3. The ceramic spray wire according to claim 1 or 2, wherein the binder is a cellulose derivative. 4. The ceramic thermal spray wire according to claim 3, wherein the cellulose derivative comprises one or a mixture of two or more of methylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, and carboxymethylcellulose. 5. The resin mixture according to any one of claims 1 to 4, wherein the resin mixture is a mixture of ethylcellulose, xylene, toluene, or a mixture thereof with alcohol added thereto. Ceramic spray wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61126320A JPS62284061A (en) | 1986-05-31 | 1986-05-31 | Ceramic wire for thermal spraying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61126320A JPS62284061A (en) | 1986-05-31 | 1986-05-31 | Ceramic wire for thermal spraying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62284061A JPS62284061A (en) | 1987-12-09 |
| JPH0244898B2 true JPH0244898B2 (en) | 1990-10-05 |
Family
ID=14932267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61126320A Granted JPS62284061A (en) | 1986-05-31 | 1986-05-31 | Ceramic wire for thermal spraying |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62284061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2025515060A (en) * | 2022-05-04 | 2025-05-13 | サン－ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン | Flexible cord for supplying a thermal spray torch, and thermal spray device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6639806B2 (en) * | 2015-05-19 | 2020-02-05 | 日本コーティング工業株式会社 | Coating and method for forming the coating |
-
1986
- 1986-05-31 JP JP61126320A patent/JPS62284061A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2025515060A (en) * | 2022-05-04 | 2025-05-13 | サン－ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン | Flexible cord for supplying a thermal spray torch, and thermal spray device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62284061A (en) | 1987-12-09 |
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