JPH08966B2 - Heat-treating furnace hearth roll with excellent build-up resistance - Google Patents
Heat-treating furnace hearth roll with excellent build-up resistanceInfo
- Publication number
- JPH08966B2 JPH08966B2 JP24407786A JP24407786A JPH08966B2 JP H08966 B2 JPH08966 B2 JP H08966B2 JP 24407786 A JP24407786 A JP 24407786A JP 24407786 A JP24407786 A JP 24407786A JP H08966 B2 JPH08966 B2 JP H08966B2
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- furnace hearth
- hearth roll
- heat
- silicic acid
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は熱処理炉ハースロールに関するものである。TECHNICAL FIELD The present invention relates to a heat treatment furnace hearth roll.
（従来の技術及び問題点） 熱処理炉ハースロールに溶射ロールを用いると溶射皮
膜表面の気孔や微細なクラックに浸入もしくは付着した
スケールなどが雰囲気で還元されて金属になり、これが
生長して、いわゆるビルドアップを起こし、製品に傷を
付ける。ビルドアップの形状はなめくじ状，粒状，箔状
などいろいろで一定ではない。このビルドアップを防止
するのに封孔処理が有効であるが、熱処理炉内で使用さ
れるため、900〜1200℃の高温に耐えるものでなければ
ならない。従来、高温での封孔処理剤として考えられて
いるものに珪酸ソーダやリン酸アルミニウムなどがある
が、これらは加熱時に発泡したり、溶射皮膜が割れまた
ははく離したりして封孔が不完全になる。これらの点に
留意して種々実験を試みた結果、本発明を完成した。(Prior art and problems) When a thermal spraying roll is used for the heat treatment furnace hearth roll, scales that have entered or adhered to the pores and fine cracks on the surface of the thermal spray coating are reduced in the atmosphere to become metal, which grows, Build up and damage the product. The shape of the build-up is various, such as slug shape, granular shape, and foil shape, and is not constant. The sealing treatment is effective in preventing this build-up, but since it is used in a heat treatment furnace, it must withstand a high temperature of 900 to 1200 ° C. Sodium silicate and aluminum phosphate have been conventionally considered as sealing agents at high temperatures, but these are not completely sealed due to foaming during heating, cracking or peeling of the sprayed coating. become. The present invention has been completed as a result of conducting various experiments while paying attention to these points.
（問題点を解決するための手段） 本発明の要旨とするところは、ロール表面の溶射皮膜
層に、無水珪酸のコロイド溶液を用いて封孔処理を施し
てなることを特徴とする耐ビルドアップ性に優れた熱処
理炉ハースロールルにある。(Means for Solving Problems) The gist of the present invention is that the thermal spray coating layer on the roll surface is subjected to sealing treatment using a colloidal solution of silicic acid anhydride, which is characterized by build-up resistance. It is located in the heat treatment furnace Haas Roll, which has excellent properties.
本発明で使用する無水珪酸のコロイド溶液は無水珪酸
を超微粒子化して水中に分散させたもので、化学反応に
よる発泡がなく、分散質に水を使用しているため、溶射
皮膜内に毛細管現象で容易に浸透する。更に、浸透性を
高めるには分散質にアルコールを１〜20％添加すればよ
い。アルコールを20％以上添加すると溶媒和している無
水珪酸のコロイドは分散質とのイオン結合がアルコール
との結合に置換されるため無水珪酸が塩析する。コロイ
ドを安定化するためにホルムアミド，エチルアミン，エ
タノールアミンのようなアミン類を１〜10％添加すると
効果がある。ただし、10％以上添加すると塩析を起し易
くなる。The colloidal solution of silicic acid anhydride used in the present invention is ultrafine particles of silicic acid anhydride and dispersed in water. Since there is no foaming due to a chemical reaction and water is used as the dispersoid, capillary phenomenon occurs in the thermal spray coating. Penetrate easily with. Further, in order to enhance the permeability, 1 to 20% of alcohol may be added to the dispersoid. When alcohol is added in an amount of 20% or more, the solvated silicic acid colloid replaces the ionic bond with the dispersoid by the bond with alcohol, and the silicic acid salt is salted out. It is effective to add 1-10% of amines such as formamide, ethylamine and ethanolamine to stabilize the colloid. However, if 10% or more is added, salting out tends to occur.
無水珪酸のコロイド溶液により封孔された溶射ロールは
分散質が気化した後、無水珪酸が溶射皮膜内の気孔およ
び微細なクラックに結晶として残存したものになる。無
水珪酸は化学的に安定で高温下においても、酸化、還元
されることなく、封孔効果を失わない。従って、加熱時
に発泡して皮膜が割れたりはく離するようなことはな
い。分散質を気化させるとき、常温で自然気化されると
コロイド溶液の濃度が徐々に高くなり、析出時に大きな
結晶となるため封孔効果が向上する。After the dispersoid is vaporized, the thermal spraying roll sealed with the colloidal solution of silicic acid anhydride has the silicic acid anhydride remaining as crystals in the pores and fine cracks in the thermal spray coating. Silicic anhydride is chemically stable, does not oxidize or reduce even at high temperature, and does not lose its pore-sealing effect. Therefore, the film does not crack or peel off when heated. When the dispersoid is vaporized, if it is naturally vaporized at room temperature, the concentration of the colloidal solution gradually increases, and large crystals are formed at the time of precipitation, so that the sealing effect is improved.
以上述べたように本発明の無水珪酸のコロイド溶液を
用いて封孔処理を行うことにより耐ビルドアップ性に優
れた熱処理炉ハースロールがえられる。As described above, the heat treatment furnace hearth roll having excellent build-up resistance can be obtained by performing the sealing treatment using the colloidal solution of silicic acid anhydride of the present invention.
以下実施例について説明する。 Examples will be described below.
（実施例） 封孔処理剤は無水珪酸20％のコロイド溶液を用いた。
次に封孔処理工程は（イ）常温で溶射皮膜に塗布、
（ロ）30分自然放置して乾燥、（ハ）上記（イ）（ロ）
を10回繰返す、（ニ）表面仕上げ研摩、（ホ）上記
（イ）〜（ハ）を繰返す、（ヘ）サンドペーパ♯240で
溶射皮膜表面に付着した余剰の珪酸の除去、の各工程か
らなる。(Example) As a pore-sealing agent, a colloidal solution of silicic acid 20% was used.
Next, in the sealing process, (a) apply the spray coating at room temperature,
(B) Let stand for 30 minutes to dry, (c) Above (a) (b)
10 times, (d) surface finishing polishing, (e) repeating the above (a) to (c), and (f) removing excess silicic acid adhering to the surface of the sprayed coating with sandpaper # 240. .
以上の封孔処理を実機に適用した結果を第１表に示し
た。本発明の無水珪酸で封孔処理したロールは封孔処理
しなかったロールと比べて、スケールなどの浸入や物理
的吸着がないため耐ビルドアップ性が著しく向上し、ロ
ールの連続使用期間を大幅に延長することができた。Table 1 shows the results of applying the above sealing treatment to an actual machine. Compared to the rolls not sealed, the rolls sealed with silicic acid anhydride of the present invention do not have infiltration of scales or physical adsorption, so that the build-up resistance is significantly improved and the continuous use period of the rolls is significantly increased. Could be extended to.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−92427（ＪＰ，Ａ) 特開 昭63−100162（ＪＰ，Ａ) 特開 昭63−52793（ＪＰ，Ａ) 特公 昭60−25490（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-92427 (JP, A) JP-A-63-100162 (JP, A) JP-A-63-52793 (JP, A) JP-B-60- 25490 (JP, B2)
Claims (1)
ロイド溶液を用いて封孔処理を施してなることを特徴と
する耐ビルドアップ性に優れた熱処理炉ハースロール。1. A heat treatment furnace hearth roll having excellent build-up resistance, characterized in that the thermal spray coating layer on the roll surface is sealed with a colloidal solution of silicic acid anhydride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24407786A JPH08966B2 (en) | 1986-10-16 | 1986-10-16 | Heat-treating furnace hearth roll with excellent build-up resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24407786A JPH08966B2 (en) | 1986-10-16 | 1986-10-16 | Heat-treating furnace hearth roll with excellent build-up resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63100169A JPS63100169A (en) | 1988-05-02 |
| JPH08966B2 true JPH08966B2 (en) | 1996-01-10 |
Family
ID=17113391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24407786A Expired - Lifetime JPH08966B2 (en) | 1986-10-16 | 1986-10-16 | Heat-treating furnace hearth roll with excellent build-up resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08966B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4732765B2 (en) * | 2005-01-28 | 2011-07-27 | 株式会社ネオス | Surface treatment method for thin film manufacturing apparatus member and thin film manufacturing apparatus member |
| JP5356929B2 (en) * | 2009-06-24 | 2013-12-04 | Ｊｆｅスチール株式会社 | Hearth roll and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6025490B2 (en) | 2012-10-12 | 2016-11-16 | 大成建設株式会社 | Dust collection function abnormality detection method and apparatus for dust collection exhaust system |
-
1986
- 1986-10-16 JP JP24407786A patent/JPH08966B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6025490B2 (en) | 2012-10-12 | 2016-11-16 | 大成建設株式会社 | Dust collection function abnormality detection method and apparatus for dust collection exhaust system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63100169A (en) | 1988-05-02 |
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