JPS6357789A - Sink roll for salt bath - Google Patents
Sink roll for salt bathInfo
- Publication number
- JPS6357789A JPS6357789A JP20088586A JP20088586A JPS6357789A JP S6357789 A JPS6357789 A JP S6357789A JP 20088586 A JP20088586 A JP 20088586A JP 20088586 A JP20088586 A JP 20088586A JP S6357789 A JPS6357789 A JP S6357789A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- fluxing
- self
- salt bath
- alloy
- 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
- 150000003839 salts Chemical class 0.000 title claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- 239000011247 coating layer Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 238000007751 thermal spraying Methods 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 3
- 229910008423 Si—B Inorganic materials 0.000 abstract 3
- 229910000746 Structural steel Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical compound [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、例えば加熱炉から出たストリップ等の銅材の
脱スケールや、熱処理のためのソルトバス中に浸漬状態
で配置される鋼板搬送用のロール、所謂ソルトバスシン
クロールの構造に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention is useful for descaling copper materials such as strips that come out of heating furnaces, and for conveying steel sheets immersed in a salt bath for heat treatment. Regarding the structure of the so-called salt bath sink roll.
かかるソルトバスは通常、苛性ソーダを主成分とする組
成物の４００℃以上の浴であって、このソルトバス内に
配置される搬送用ロールは、通常Ｈｖ２３０程度の表面
硬さを持つ鋳鉄製のものが使用されている。Such a salt bath is usually a bath containing a composition mainly composed of caustic soda at a temperature of 400°C or higher, and the conveying rolls placed in this salt bath are usually made of cast iron with a surface hardness of about Hv230. is used.
しかしながら、鋳鉄製のロールはソルトバス内において
は耐食性において不足し、比較的短時間内にロール表面
に肌荒れが生じ通板材に疵を生じるためにロールの取替
えを頻繁に行なう必要がある。However, cast iron rolls lack corrosion resistance in a salt bath, and the roll surface becomes rough within a relatively short period of time, causing scratches on the threaded material, requiring frequent replacement of the rolls.
この取替えは、ラインを停止しなければならず、設備の
稼働効率を下げる原因になるばかりではなく、ロール再
生のための表面研磨のために相当の手間を要している。This replacement requires the line to be stopped, which not only causes a reduction in the operating efficiency of the equipment, but also requires considerable effort for surface polishing for roll regeneration.
この問題を解決するだめの手段として、まず材質の変更
が考えられるが、本質的に高価になるばかりではなく、
表面硬化のための格別の熱処理を要する割には効果が上
がらない。One possible solution to this problem is to change the material, but this is not only inherently expensive, but also
Although it requires special heat treatment for surface hardening, it is not very effective.
また、材質を変更する代わりに耐食性皮膜をロール表面
に形成することも試みられた。その皮膜材として硬さと
耐食性の点から最も好適であると考えられるのが特開昭
５７−１８３３７２号に開示されたセラミックスであり
、また、皮膜形成手段として最も安易に行なうことがで
きるものとしてプラズマによる溶射方法の採用がある。Additionally, attempts have been made to form a corrosion-resistant film on the roll surface instead of changing the material. Ceramics disclosed in JP-A-57-183372 are considered to be the most suitable coating material from the viewpoint of hardness and corrosion resistance, and plasma is the easiest coating material to form. Thermal spraying method is adopted.
しかしながら、一般的にセラミックスは材料そのものと
して高い硬さを有し、耐食性も良いが、溶射により形成
されたセラミックス皮膜は多孔質であり、封孔処理を施
さない限りは生地に腐食剤が浸透して耐食性の面で格別
の効果は期待できないし、さらに、封孔処理自体も充分
に行なうことができないという問題がある。However, although ceramics generally have high hardness as a material and have good corrosion resistance, the ceramic coating formed by thermal spraying is porous, and corrosive agents will not penetrate into the fabric unless it is sealed. Therefore, no particular effect can be expected in terms of corrosion resistance, and furthermore, there is a problem that the sealing treatment itself cannot be performed satisfactorily.
本発明において解決すべき課題は、ロール表面に溶射皮
膜を形成するに当たって問題点を解消して、裔硬度且つ
高耐食性を有する耐用性に優れたソルトバスシンクロー
ルを得ることにある。The problem to be solved in the present invention is to solve the problems in forming a thermal spray coating on the roll surface and to obtain a salt bath sink roll with excellent durability and high hardness and high corrosion resistance.
本発明は、外表面にニッケル基自溶合金の溶射被膜層を
形成してなるソルトバスシンクロールであって、母材と
の結合が金属結合であり皮膜内の粒子結合も金属結合を
形成し耐剥離性と共に、硬度が高く、化学腐食も含め耐
食性に優れた溶射皮膜を形成できる自溶合金を適用する
に当たって、とくにニッケル基の自溶合金がソルトバス
浸漬ロールとして優れたものであるいう知見に基づいて
完成したものである。The present invention is a salt bath sink roll in which a thermally sprayed coating layer of a nickel-based self-fluxing alloy is formed on the outer surface, and the bond with the base material is a metallic bond, and the bonding of particles within the coating also forms a metallic bond. Knowledge that nickel-based self-fluxing alloys are particularly excellent for use in salt bath immersion rolls when applying self-fluxing alloys that can form thermal sprayed coatings that have high hardness and excellent resistance to corrosion, including chemical corrosion, as well as peeling resistance. It was completed based on.
すなわち、自ン容合金はＮｉ−５ｉ−Ｂ系、Ｎｉ−Ｃｒ
−５ｉ−Ｂ系、ＣｏＪｌｉ−Ｃｒ−５ｉ−８それにＮｉ
−Ｃｒ−５ｉ−ＷＣ系に大別でき、実用上は、これらに
ＭＯ％ ＣｕＳＦｅ等を添加して使用されるものである
０本発明はこれらの自溶合金の中、ロール基材が鋳鉄の
場合、Ｃｏ基自溶合金は鋳鉄中のカーボンを固溶した別
層を溶射層に形成して耐食性において劣るのに対して、
Ｎｉ基自溶合金による溶射皮膜は貰い表面硬度と耐摩耗
性と共に、優れた耐食性を示し、さらにロール基材が普
通鋼の場合、Ｎｉ基自溶合金の方がより優れた耐食性を
示すという知見を得た。In other words, self-containing alloys include Ni-5i-B series, Ni-Cr
-5i-B series, CoJli-Cr-5i-8 and Ni
-Cr-5i-WC type alloys, and in practice they are used by adding MO% CuSFe, etc. Among these self-fluxing alloys, the present invention focuses on alloys whose roll base material is cast iron. In the case of Co-based self-fluxing alloys, a separate layer containing solid solution of carbon in cast iron is formed in the sprayed layer, which results in poor corrosion resistance.
Thermal sprayed coatings made from Ni-based self-fluxing alloys exhibit excellent corrosion resistance as well as surface hardness and wear resistance.Furthermore, when the roll base material is ordinary steel, the Ni-based self-fluxing alloys show superior corrosion resistance. I got it.
軸部にＪＩＳ ５Ｓ−４１の一般構造用圧延鋼材からな
る胴部をフランジ止めした構造を有するロールの胴部に
、下表に示す組成を有する１、５ ｍｔｓ厚の自溶合金
の溶射皮膜層を形成した。The body of the roll has a structure in which a body made of JIS 5S-41 general structural rolled steel is flanged to the shaft, and a sprayed coating layer of a self-fluxing alloy with a thickness of 1.5 mts having the composition shown in the table below is applied. was formed.
溶射の施工工程は、
■ 表面のアンダーカット
■ 脱脂、プラスト
■ ガスガンにより平均粒径７５μ−の合金粉末を！、
５〜１．８ａ＋ｍ厚みに溶射
■ 均一加熱保温炉の条件下でのヒユージング■ 溶射
膜厚０．７〜０．８ｍ＋ｍまで研磨仕上げの工程によっ
て行った。The thermal spraying process includes: ■ Undercutting the surface ■ Degreasing and plasting ■ Spraying alloy powder with an average particle size of 75μ using a gas gun! ,
Thermal spraying to a thickness of 5 to 1.8 a+m ■ Fusing under the conditions of a uniform heating and insulating furnace ■ The thermal spraying was carried out by a polishing process to a thickness of 0.7 to 0.8 m+m.
溶射合金組成（重量％）
比較のために、下地層としてハステロイＣとニッケル、
その表面層としてＷＣ−Ｃｏ、 ＡＡ２０３−ＴｉＯ２
又はＣｒ２０Ｂの溶射層を組み合わせて皮膜を形成した
。Thermal spray alloy composition (wt%) For comparison, Hastelloy C and nickel were used as the base layer.
As its surface layer, WC-Co, AA203-TiO2
Alternatively, a coating was formed by combining a thermally sprayed layer of Cr20B.
ＮａＯＨ８０χとＮａＮＯ３８χを有する４５０℃のソ
ルトバス中に２０日間の浸漬テストを行った結果、上記
本発明のものは何等の異常が認められなかったのに対し
、上記何れの比較例も腐食量が大きく、溶射皮膜の剥離
を生じた。As a result of a 20-day immersion test in a 450°C salt bath containing 80x NaOH and 38x NaNO, no abnormalities were observed in the products of the present invention, whereas the amount of corrosion was large in all of the comparative examples. , peeling of the sprayed coating occurred.
また、ＮｉをＣｏで置き換えた自溶合金をＮｉ基自溶合
金と同一条件で溶射皮膜層を形成したものと、同様の比
較試験を行った。In addition, a similar comparative test was conducted using a self-fluxing alloy in which Ni was replaced with Co and a thermally sprayed coating layer was formed under the same conditions as the Ni-based self-fluxing alloy.
その結果を添付の図に示す。同図から、Ｃｏ基基合金場
合は浸漬後１２日目までに膜厚は掻端に減少し、突起状
の膨れが皮膜に発生したのに対して、Ｎｉ基合金の場合
は殆ど変化しなかった。The results are shown in the attached figure. From the same figure, it can be seen that in the case of Co-based alloy, the film thickness decreased sharply by the 12th day after immersion, and protruding blisters appeared on the film, whereas in the case of Ni-based alloy, there was almost no change. Ta.
耐剥離性、耐食性が高く、かつ搬送ロールとして必要な
表面硬度を有するソルトバスシンクロールを安価に提供
できる。A salt bath sink roll that has high peeling resistance, high corrosion resistance, and surface hardness necessary for a conveyance roll can be provided at a low cost.
添付図は、Ｎｉ基の自溶合金とＣｏ基の自溶合金との耐
食性の比較試験結果を示す。The attached figure shows the results of a comparative test of corrosion resistance between a Ni-based self-fluxing alloy and a Co-based self-fluxing alloy.
Claims (1)
てなることを特徴とするソルトバスシンクロール。1. A salt bath sink roll characterized by forming a thermally sprayed coating layer of a nickel-based self-fluxing alloy on the outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20088586A JPS6357789A (en) | 1986-08-26 | 1986-08-26 | Sink roll for salt bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20088586A JPS6357789A (en) | 1986-08-26 | 1986-08-26 | Sink roll for salt bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6357789A true JPS6357789A (en) | 1988-03-12 |
Family
ID=16431861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20088586A Pending JPS6357789A (en) | 1986-08-26 | 1986-08-26 | Sink roll for salt bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6357789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005052210A1 (en) * | 2003-11-21 | 2005-06-09 | General Electric Company | Erosion resistant coatings and methods thereof |
| JP2005213555A (en) * | 2004-01-29 | 2005-08-11 | Mitsubishi Electric Corp | Electrode for discharge surface treatment and discharge surface treatment method |
| KR100931664B1 (en) * | 2007-12-21 | 2009-12-14 | 주식회사 포스코 | Abrasion resistant scale brake work roll |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5288526A (en) * | 1976-01-21 | 1977-07-25 | Hitachi Ltd | Roll for rolling |
| JPS576508A (en) * | 1980-06-10 | 1982-01-13 | Taizou Murakami | Long cable extending device |
-
1986
- 1986-08-26 JP JP20088586A patent/JPS6357789A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5288526A (en) * | 1976-01-21 | 1977-07-25 | Hitachi Ltd | Roll for rolling |
| JPS576508A (en) * | 1980-06-10 | 1982-01-13 | Taizou Murakami | Long cable extending device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005052210A1 (en) * | 2003-11-21 | 2005-06-09 | General Electric Company | Erosion resistant coatings and methods thereof |
| US7141110B2 (en) | 2003-11-21 | 2006-11-28 | General Electric Company | Erosion resistant coatings and methods thereof |
| US7431566B2 (en) | 2003-11-21 | 2008-10-07 | General Electric Company | Erosion resistant coatings and methods thereof |
| JP2005213555A (en) * | 2004-01-29 | 2005-08-11 | Mitsubishi Electric Corp | Electrode for discharge surface treatment and discharge surface treatment method |
| JP4608220B2 (en) * | 2004-01-29 | 2011-01-12 | 三菱電機株式会社 | Discharge surface treatment electrode and discharge surface treatment method |
| KR100931664B1 (en) * | 2007-12-21 | 2009-12-14 | 주식회사 포스코 | Abrasion resistant scale brake work roll |
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