JPH062101A - Alumina-zircon thermal spray material containing metal powder - Google Patents
Alumina-zircon thermal spray material containing metal powderInfo
- Publication number
- JPH062101A JPH062101A JP15546092A JP15546092A JPH062101A JP H062101 A JPH062101 A JP H062101A JP 15546092 A JP15546092 A JP 15546092A JP 15546092 A JP15546092 A JP 15546092A JP H062101 A JPH062101 A JP H062101A
- Authority
- JP
- Japan
- Prior art keywords
- zircon
- alumina
- thermal spray
- chromium
- corrosion resistance
- 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
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
(57)【要約】
【目的】 十分な接着性、耐スポーリング性、耐食性を
有し、種々の工業窯炉のライニングに適用しても十分な
耐用性を有するアルミナ−ジルコン質溶射材料の提供。
【構成】 ジルコンを３０〜９０重量％、金属クロム及
びクロム成分を含有する合金から選ばれる１種以上を
０．５〜１０重量％、残部がアルミナを主材とすること
によって、格別溶射条件を変更することなく、付着性、
接着性、耐食性、耐熱衝撃性を大幅に向上させた溶射体
を形成できる。(57) [Summary] [Purpose] To provide an alumina-zircon sprayed material having sufficient adhesiveness, spalling resistance and corrosion resistance, and having sufficient durability even when applied to the lining of various industrial kilns. . [Structure] Zircon is used in an amount of 30 to 90% by weight, one or more kinds selected from alloys containing metallic chromium and a chromium component in an amount of 0.5 to 10% by weight, and the balance being alumina as a main material. Adhesiveness, without modification
It is possible to form a thermal spray material with greatly improved adhesion, corrosion resistance, and thermal shock resistance.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、工業窯炉の耐火ライニ
ングの形成あるいは補修用として用いられる溶射材に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal spray material used for forming or repairing a refractory lining of an industrial kiln.
【０００２】[0002]
【従来の技術】近年、工業窯炉の耐火ライニング及びそ
の補修に、高温、高速の火炎中を耐火粉末を飛行させて
溶融し、吹き付ける溶射法が利用されるようになった。2. Description of the Related Art In recent years, for the refractory lining and repair of industrial kilns, a thermal spraying method has been used in which refractory powder is flown in a high-temperature, high-speed flame to melt and blow it.
【０００３】通常の工業窯炉に対する溶射には、ＬＰＧ
−酸素、灯油−酸素、及びコークス粉−酸素炎等による
火炎あるいはプラズマ等による方法が採用されている。LPG is used for thermal spraying of a normal industrial kiln.
-Oxygen, kerosene-oxygen, and coke powder-oxygen flame or plasma is used.
【０００４】最近の工業窯炉、特に製鋼炉用には、炉壁
形成及び操業条件によって種々のれんがあるいは不定形
耐火物が使用されている。その中でもジルコン含有耐火
物を使用した炉においては、使用条件が厳しく、マグネ
シア−スラグ系あるいはアルミナ−クロム鉱系溶射材で
は、熱膨張差によって接着性、耐熱衝撃性等が不足し満
足のいく耐用が得られない。In recent industrial kilns, especially steelmaking furnaces, various bricks or amorphous refractories are used depending on the furnace wall formation and operating conditions. Above all, in a furnace using a zircon-containing refractory, the operating conditions are strict, and with magnesia-slag-based or alumina-chromium-based thermal spray materials, adhesiveness, thermal shock resistance, etc. are insufficient due to the difference in thermal expansion, resulting in satisfactory service life. Can't get
【０００５】このための溶射材として、例えば、特開昭
５８−１４０３７２号公報、特開平２−８５６９２号公
報には、アルミナ−ジルコン質溶射材がジルコン含有耐
火物に対する接着性、耐スポーリング性が優れているこ
とが開示されている。As a thermal spraying material for this purpose, for example, in JP-A-58-140372 and JP-A-2-85692, an alumina-zirconic thermal spraying material is used to bond a zircon-containing refractory to an adhering property and spalling resistance. Are disclosed to be excellent.
【０００６】また、特開平２−８５６９２号公報では、
アルミナ−ジルコン質溶射材にクロム鉱を添加すること
により、更に接着性、耐スポーリング性が改善できるこ
とを開示している。Further, in Japanese Patent Laid-Open No. 2-85692,
It is disclosed that the adhesion and spalling resistance can be further improved by adding chrome ore to the alumina-zircon thermal spray material.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、アル
ミナ−ジルコン質溶射材料における耐用性の一段の改善
を図ることにあって、充分な接着性、耐スポーリング
性、耐食性を有し、種々の工業窯炉のライニングに適用
しても充分な耐用性を有するアルミナ−ジルコン質溶射
材料を提供することにある。An object of the present invention is to further improve the durability of the alumina-zircon sprayed material, which has sufficient adhesion, spalling resistance and corrosion resistance. An object of the present invention is to provide an alumina-zircon-based thermal spray material having sufficient durability even when applied to the lining of various industrial kilns.
【０００８】[0008]
【課題を解決するための手段】本発明は、ジルコンを３
０〜９０重量％、金属クロム及びクロム成分を含有する
合金から選ばれる１種以上を０．５〜１０重量％、残部
がアルミナを主材とすることを特徴とする。SUMMARY OF THE INVENTION The present invention uses zircon 3
It is characterized in that 0 to 90% by weight, 0.5 to 10% by weight of one or more kinds selected from metallic chromium and an alloy containing a chromium component, and the balance of alumina as a main material.
【０００９】[0009]
【作用】アルミナ−ジルコン質溶射材がジルコン含有耐
火物に対し接着性に優れているのは、被施工面の材質と
同じジルコンが存在するために、被施工面に対して濡れ
性が良いこと、溶射時の火炎によってジルコンが解離
し、生成したＳｉＯ2 成分が溶着しやすいこと等が考え
られる。耐スポーリング性に優れているのは、アルミナ
−ジルコン質自体熱膨張率が低いこと、及び特開昭５８
−１４０３７２号公報で述べられているように、更にＭ
ｇＯを添加すると、低膨張結晶体コージェライト（２Ｍ
ｇＯ・２Ａｌ2 Ｏ3 ・５ＳｉＯ2 ）が生成するためと考
えられる。また、耐食性に優れているのは、ジルコンと
アルミナの反応によりムライトが生成するためと考えら
れる。[Function] The reason why the alumina-zircon thermal spray material has excellent adhesion to the zircon-containing refractory is that the same zircon as the material of the work surface exists, and therefore the wettability of the work surface is good. It is considered that the zircon is dissociated by the flame at the time of thermal spraying and the generated SiO 2 component is easily welded. The excellent spalling resistance is due to the low coefficient of thermal expansion of the alumina-zircon material itself, and JP-A 58-58.
-140372, as described in
When gO is added, low expansion crystalline cordierite (2M
It is considered that this is because gO.2Al 2 O 3 .5SiO 2 ) is produced. It is considered that the excellent corrosion resistance is due to the formation of mullite by the reaction of zircon and alumina.
【００１０】また、クロム鉱の添加効果については、ク
ロム鉱の含有成分中のＦｅ酸化物及びＣｒ2 Ｏ3 が被施
工面に付着しているスラグ等に対して耐火性の高い溶着
を示すことが接着性の向上につながり、クロム鉱自体が
耐火材料であるため、耐食性の向上にもつながると考え
られる。Regarding the effect of addition of chrome ore, Fe oxide and Cr 2 O 3 contained in the components of chrome ore should exhibit high refractory welding to slag and the like adhering to the work surface. Is believed to lead to improved adhesion, and since chromium ore itself is a refractory material, it is believed to lead to improved corrosion resistance.
【００１１】本発明者はかねてより、金属粉の効用につ
いて研究を行ってきた結果、従来、例えば金属粉の添加
効果として、特公昭４３−１６０１号公報、特公昭４９
−４６３６４号公報等で提案されている溶融性の向上だ
けでなく、クロム鉱のような耐火材料を添加するよりも
接着性、耐食性の向上の効果が大きいことを見い出し
た。The present inventor has long conducted research on the effects of metal powders. As a result, for example, as effects of addition of metal powders, Japanese Patent Publication Nos. 43-1601 and 49-49.
It has been found that not only the improvement of the meltability proposed in Japanese Patent Application Laid-Open No. 46363/1992 and the like, but also the effect of improving the adhesiveness and the corrosion resistance is greater than the addition of a refractory material such as chrome ore.
【００１２】すなわち、金属クロムはクロム鉱と異な
り、酸化される際に発熱するため、溶射材の溶融性を高
める効果があり、そのために、クロム鉱よりも被施工面
に付着しているスラグ等に対しても接着性の向上の程度
が大きい。また、Ｃｒが酸化されて生じたＣｒ2 Ｏ3 が
十分にＡｌ2 Ｏ3 へ固溶する効率が高いことより、Ａｌ
2 Ｏ3 の融点を上げるため、耐食性の向上の程度が大き
い。That is, metallic chromium, unlike chromium ore, generates heat when it is oxidized, so that it has the effect of enhancing the meltability of the thermal spray material. Therefore, slag that adheres to the work surface more than chromium ore. Also, the degree of improvement in adhesiveness is great. In addition, since Cr 2 O 3 produced by oxidation of Cr has a high efficiency of sufficiently forming a solid solution in Al 2 O 3 ,
Since the melting point of 2 O 3 is raised, the degree of improvement in corrosion resistance is great.
【００１３】本発明に使用する金属クロム及びクロム成
分を含有する合金は、クロムの含有率は１０重量％以上
とする。１０重量％未満では、酸化されてＣｒ2 Ｏ3 と
なる割合が少なすぎて、接着性、耐食性が十分に向上し
ない。配合割合は、０．５〜１０重量％である。０．５
重量％未満では酸化されてＣｒ2 Ｏ3 となる割合が少な
すぎて、接着性、耐食性が十分に向上しない。１０重量
％を超えて添加しても接着性、耐食性向上の効果は十分
にあるが、金属クロム及びクロム成分を含有する合金は
高価であるため、配合割合が多くなれば、それだけコス
トが大きくなる。したがって、０．５〜１０重量％の範
囲で充分な効果が得られるため、１０重量％を超えて添
加する必要はない。粒度は０．５ｍｍ以下である。０．
５ｍｍを超えると溶融性の低下が大きく、金属クロム及
びクロム成分を含有する合金の添加効果が下がるため、
好ましくない。The metal chromium used in the present invention and the alloy containing a chromium component have a chromium content of 10% by weight or more. If it is less than 10% by weight, the ratio of being oxidized to Cr 2 O 3 is too small, and the adhesiveness and the corrosion resistance are not sufficiently improved. The compounding ratio is 0.5 to 10% by weight. 0.5
If it is less than wt%, the ratio of being oxidized to Cr 2 O 3 is too small, and the adhesiveness and corrosion resistance are not sufficiently improved. Even if added in excess of 10% by weight, the effect of improving the adhesiveness and corrosion resistance is sufficient, but metal chromium and alloys containing chromium components are expensive, so the higher the blending ratio, the higher the cost. . Therefore, a sufficient effect is obtained in the range of 0.5 to 10% by weight, so there is no need to add more than 10% by weight. The particle size is 0.5 mm or less. 0.
If it exceeds 5 mm, the meltability will be greatly reduced, and the effect of adding metallic chromium and alloys containing chromium components will decrease,
Not preferable.
【００１４】ジルコンはジルコンサンド、ジルコンフラ
ワーが使用できる。但し、粒度は０．５ｍｍ以下であ
る。０．５ｍｍを超えると、溶融性の低下が大きいため
に好ましくない。As zircon, zircon sand and zircon flour can be used. However, the particle size is 0.5 mm or less. When it exceeds 0.5 mm, the meltability is largely deteriorated, which is not preferable.
【００１５】残部はアルミナを主材とするが、必要によ
りクロム鉱、マグネシア等を適量添加してもよい。The balance is mainly made of alumina, but if necessary, chrome ore, magnesia and the like may be added in appropriate amounts.
【００１６】[0016]
【実施例】表１及び表２に示す組成を有する溶射材をプ
ロパン−酸素の火炎を熱源として、溶射バーナーから３
００ｍｍ離れたジルコン含有耐火物に対して溶射したも
のの付着性、耐食性、それに接着性を調べた。溶射材の
粒度はいずれも３００μｍ以下であった。EXAMPLE A thermal spray material having the composition shown in Tables 1 and 2 was prepared from a thermal spray burner using a propane-oxygen flame as a heat source.
The adhesiveness, corrosion resistance, and adhesiveness of the sprayed zircon-containing refractory separated by 00 mm were examined. The particle size of the thermal spray material was 300 μm or less.
【００１７】ジルコンを３０〜９０重量％、金属クロム
及びクロム成分を含有する合金から選ばれる１種以上を
０．５〜１０重量％、残部がアルミナを主材とした実施
例は、付着性、接着性、耐食性、耐熱衝撃性のいずれに
おいても優れている。Examples in which 30 to 90% by weight of zircon, 0.5 to 10% by weight of one or more kinds selected from metallic chromium and an alloy containing a chromium component, and the balance of alumina as the main material are adhesive, Excellent in adhesion, corrosion resistance, and thermal shock resistance.
【００１８】しかしながら、金属クロムの配合割合の少
ない比較例１、２及びクロム含有率の少ない合金を使用
した比較例３は、付着性、接着性、耐食性、耐熱衝撃性
のいずれも低い。However, Comparative Examples 1 and 2 containing a small amount of metal chromium and Comparative Example 3 using an alloy containing a small amount of chromium have low adhesion, adhesiveness, corrosion resistance and thermal shock resistance.
【００１９】また、ジルコンサンドの配合割合が少ない
比較例４、６は、耐食性、耐熱衝撃性が低く、ジルコン
サンドの配合割合が多すぎる比較例５は、接着性は良い
が耐食性が低い。Further, Comparative Examples 4 and 6 having a low zircon sand compounding ratio have low corrosion resistance and thermal shock resistance, and Comparative Example 5 having an excessively high zircon sand compounding ratio has good adhesiveness but low corrosion resistance.
【００２０】クロム鉱を添加した比較例７、８は、接着
性、耐熱衝撃性は良いが、付着性、耐食性が不十分であ
る。マグネシアクリンカーを添加した比較例９は付着
性、耐食性、耐熱衝撃性が不十分である。Comparative Examples 7 and 8 to which chrome ore was added have good adhesiveness and thermal shock resistance, but insufficient adhesiveness and corrosion resistance. Comparative Example 9 containing the magnesia clinker has insufficient adhesion, corrosion resistance and thermal shock resistance.
【００２１】[0021]
【表１】 [Table 1]
【表２】 [Table 2]
【００２２】[0022]
【発明の効果】本発明によって、以下の効果を奏するこ
とができる。According to the present invention, the following effects can be obtained.
【００２３】（１）格別溶射条件を変更することなく、
付着性、接着性、耐食性、耐熱衝撃性を大幅に向上させ
た溶射体を形成できる。(1) Without changing the special thermal spraying conditions,
It is possible to form a thermal spray material with greatly improved adhesion, adhesion, corrosion resistance, and thermal shock resistance.
【００２４】（２）ライニングの形成、補修効果を上げ
ることができ、工業窯炉の稼働率向上、補修工数の低減
等に貢献する効果は極めて大きい。(2) It is possible to improve the effect of forming and repairing the lining, and it is very effective in improving the operating rate of the industrial kiln and reducing the repair man-hours.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 原田 茂美 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 (72)発明者 祐成 史郎 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 (72)発明者 麻生 誠二 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigemi Harada 1 Nishinosu, Oita-shi, Oita Pref. Nippon Steel Co., Ltd. Oita Works (72) Shiro Yunari 1st place Nishinosu, Oita-shi, Oita Pref. (72) Inventor, Seiji Aso, Oita City, Oita Prefecture, Nishinosu, Shinjuku, Nippon Steel Co., Ltd. Oita Works, Oita Works
Claims (1)
ム及びクロム成分を含有する合金から選ばれる１種以上
を０．５〜１０重量％、残部がアルミナを主材とした金
属粉含有アルミナ−ジルコン質溶射材。1. Alumina containing metal powder containing 30 to 90% by weight of zircon, 0.5 to 10% by weight of at least one selected from metallic chromium and an alloy containing a chromium component, and the balance being alumina as a main material. Zircon thermal spray material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15546092A JPH062101A (en) | 1992-06-15 | 1992-06-15 | Alumina-zircon thermal spray material containing metal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15546092A JPH062101A (en) | 1992-06-15 | 1992-06-15 | Alumina-zircon thermal spray material containing metal powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH062101A true JPH062101A (en) | 1994-01-11 |
Family
ID=15606538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15546092A Pending JPH062101A (en) | 1992-06-15 | 1992-06-15 | Alumina-zircon thermal spray material containing metal powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062101A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010063698A (en) * | 1999-12-24 | 2001-07-09 | 이구택 | Coating method for the roll of high concentration of Zircon |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62297451A (en) * | 1986-06-16 | 1987-12-24 | Sumitomo Metal Ind Ltd | Ceramic material for thermal spraying and thermal spraying method |
| JPH01188659A (en) * | 1988-01-22 | 1989-07-27 | Toyota Motor Corp | Formation of thermally sprayed ceramic layer |
| JPH0285692A (en) * | 1988-09-21 | 1990-03-27 | Harima Ceramic Co Ltd | Flame spraying material for industrial kiln |
-
1992
- 1992-06-15 JP JP15546092A patent/JPH062101A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62297451A (en) * | 1986-06-16 | 1987-12-24 | Sumitomo Metal Ind Ltd | Ceramic material for thermal spraying and thermal spraying method |
| JPH01188659A (en) * | 1988-01-22 | 1989-07-27 | Toyota Motor Corp | Formation of thermally sprayed ceramic layer |
| JPH0285692A (en) * | 1988-09-21 | 1990-03-27 | Harima Ceramic Co Ltd | Flame spraying material for industrial kiln |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010063698A (en) * | 1999-12-24 | 2001-07-09 | 이구택 | Coating method for the roll of high concentration of Zircon |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
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