JP3664450B2 - Float glass manufacturing roll - Google Patents
Float glass manufacturing roll Download PDFInfo
- Publication number
- JP3664450B2 JP3664450B2 JP32214894A JP32214894A JP3664450B2 JP 3664450 B2 JP3664450 B2 JP 3664450B2 JP 32214894 A JP32214894 A JP 32214894A JP 32214894 A JP32214894 A JP 32214894A JP 3664450 B2 JP3664450 B2 JP 3664450B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- molten tin
- corrosion
- coating
- tin
- 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 - Fee Related
Links
- 239000005329 float glass Substances 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title description 6
- 238000000576 coating method Methods 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 21
- 229910000531 Co alloy Inorganic materials 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 34
- 230000007797 corrosion Effects 0.000 description 25
- 238000005260 corrosion Methods 0.000 description 25
- 239000000463 material Substances 0.000 description 19
- 238000005507 spraying Methods 0.000 description 17
- 239000011521 glass Substances 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 230000035515 penetration Effects 0.000 description 8
- 238000007751 thermal spraying Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910018138 Al-Y Inorganic materials 0.000 description 2
- 238000006124 Pilkington process Methods 0.000 description 2
- 229910001347 Stellite Inorganic materials 0.000 description 2
- 239000011195 cermet Substances 0.000 description 2
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004453 electron probe microanalysis Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910019589 Cr—Fe Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- 229910000946 Y alloy Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
- C03B35/181—Materials, coatings, loose coverings or sleeves thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Description
【０００１】
【産業上の利用分野】
本発明は、板ガラスのフロート製造ラインにおけるリフトアウトロールやレアロール等の搬送ロールの耐久性の改良に関する。
【０００２】
【従来の技術】
板ガラスのフロート製造ラインにおいて、ガラス溶融炉から溶融錫（Ｓｎ）の浴槽に供給される溶融ガラスは、錫浴表面を浮遊前進しつつ所定の厚さと幅寸法を有する平坦で滑らかなガラスリボンとなって錫浴槽から導出され、リフトアウトロールやレアロール等の搬送ロールに担持されて徐冷ゾーンに移送される。
上記リフトアウトロール等の搬送ロールは、高温状態のガラスリボンと接触し、約６００〜６５０℃の高温度にさらされるので、そのロール胴部を、ＨＫ４０材（２５Ｃｒ−２０Ｎｉ−Ｆｅ）や、ＨＨ材（１３Ｃｒ−２６Ｎｉ−Ｆｅ）等の耐熱合金鋼で形成したものが使用されている。
【０００３】
【発明が解決しようとする課題】
フロートガラス製造ラインの搬送ロールは、錫浴を通過したガラスリボンの接触により、ロール胴部表面に溶融錫が付着する。溶融錫は、ほとんどのステンレス鋼を腐食する程の極めて強い腐食性を有している。このため、搬送ロールの胴部は、溶融錫の腐食作用による肌荒れ，凹凸等の表面劣化を生じ易い。
ロールの胴部表面が腐食により劣化すると、その表面状態が、ガラスリボンの下面に転写され、また腐食反応生成物がガラスリボンを汚染する等の不都合を生じ、ガラス品質や製造歩留りの低下等をきたす原因となる。
本出願人は、上記搬送ロールの溶融錫に対する耐食性の改善策として、既出願において、Ｃｏ−Ｃｒ−Ａｌ−Ｙ系合金（Cr;15-30%,Al;5-16%,Y;0.1-1%,Co;Bal）の溶射皮膜をロール胴部表面に形成し、その被覆保護効果による改良された腐食抵抗性を有する搬送ロールを提供した（特開平４−２６０６２９号公報）。
本発明は、上記溶射皮膜の溶融錫に対する腐食抵抗性を更に改良したフロートガラス製造用搬送ロールを提供するものである。
【０００４】
【課題を解決するための手段】
本発明のフロートガラス製造用ロールは、
ロール胴部の金属基材表面に、Ｃｒ：１０〜４０％，Ａｌ：２〜２０％，Ｔｉ：２〜２０％，Ｙ：０．１〜２％，残部実質的にＣｏからなるコバルト合金の溶射皮膜が形成されていることを特徴としている。
【０００５】
【作用】
MCrAlX合金系〔M:鉄族元素（Fe,Co,Ni）、Cr,Al:酸化皮膜形成元素、X:酸化皮膜を補強する元素（希土類元素等）〕は、ガスタービン翼等の耐熱材料として知られている材種であるが、この合金系をベースとする上記成分構成を有するCo-Cr-Al-Ti-Y 合金は、溶融錫に対する濡れ性や、腐食反応に対する抵抗性等において、前記公報に開示されたCo-Cr-Al-Y合金を凌ぐ卓抜した特性を示す。
本発明の搬送ロールは、胴部表面に形成された上記合金からなる溶射皮膜の被覆保護効果として、溶融錫の付着、および腐食損傷，膜内透過に等に対する高度の抵抗性を備え、ロール胴部の健全な表面状態が安定に保持される。
【０００６】
本発明のロール胴部を被覆保護する溶射皮膜合金の成分限定理由は次のとおりである。
Ｃｒ：１０〜４０％
Ｃｒは、保護性酸化膜であるＣｒ2 Ｏ3 膜を生成し、溶融錫に対する腐食抵抗性をもたらす。また、Ａｌを活性化し、Ａｌ2 Ｏ3 膜の生成を促進する。この効果は、１０％以上の添加により得られる。しかし、４０％を越えると、溶射皮膜の延性が乏しくなり、実機使用において、熱衝撃等による亀裂・剥離等を生じ易くなるので、これを上限とする。
【０００７】
Ａｌ：２〜２０％
Ａｌは、Ａｌ2 Ｏ3 の保護性酸化膜を形成して溶融錫に対する耐腐食性を高める。この効果を得るには、少なくとも２％を必要とする。しかし、その量が多くなると、溶射施工上の困難（溶射時の皮膜の亀裂発生等）をきたすので、２０％を超えてはならない。
【０００８】
Ｔｉ：２〜２０％
Ｔｉは、ＴｉＯ2 の保護性酸化膜を形成し、溶融錫に対する腐食抵抗性を強化する。この効果は２％以上の添加により得られるが、多量に添加すると、溶射皮膜の耐熱衝撃性が低下し、耐亀裂・剥離性の不足を招く。このため、２０％を上限とする。
【０００９】
Ｙ：０．１〜２％
Ｃｏ−Ｃｒ−Ａｌ系に対するＹの添加は、上記酸化皮膜の密着性，高温耐食性，溶融錫の拡散浸透阻止能等を高め、その保護膜機能を強化する。この効果は、固溶限をこえる量のＹの添加（Ｃｏ3 Ｙが粒界に優先析出する）により得られる。このため、Ｙは０．１％以上の添加を必要とする。しかし、多量に添加すると、延性の低下をきたすので、２％を上限とする。
【００１０】
Ｃｏ：バランス成分
Ｃｏは、鉄族元素のなかでも、特に溶融錫との反応性の小さく安定な元素である。Ｃｏをバランス成分とすることにより、溶融錫に対する高度の腐食抵抗性を確保することが可能となる。
【００１１】
上記コバルト基合金の溶射皮膜をロール胴部の基材表面に形成する溶射施工は、ガスプラズマ溶射、水プラズマ溶射、ジェットコート溶射、アーク溶射等の各種溶射法を適用して行うことができる。就中、ガスプラズマ溶射やジェットコート溶射法は、緻密性の高い皮膜（気孔率約５〜１０％）を形成できる点で有利である。溶射皮膜の膜厚は約０．０５〜０．５mm程度であってよい。
ロール胴部の基材の材種は、従来のロール胴部材と同様の耐熱合金鋼（ＨＫ４０，ＨＨ材等）であってむろん構わないが、本発明では、上記溶射皮膜の被覆保護効果として、ガラスリボンや雰囲気ガスとの接触が遮断されるので、従来のロールに要求されるような高度の耐熱性を必要とせず、それよりグレードの低い合金鋼を適用することもできる。
【００１２】
図１は、本発明のロールの断面構造を模式的に示している。（11) は胴部基材であり、両端開口部に軸部材（15,15 ）が嵌着固定されている。（12）は、胴部基材（11) の表面を被覆保護する溶射皮膜である。
その搬送用ロールは、胴部基材（11）である円筒体（例えば, 遠心力鋳造管に機械加工を加えたもの）に軸部材（15,15 ）を取付け、胴部基材（11）の表面に、適宜の予備処理（溶射皮膜の密着性を高めるためのサンドブラスト等）を施したうえ、溶射施工し、ついで溶射皮膜（12）の膜面に研削・研摩等の仕上げ加工を加えて製造される。
【００１３】
【実施例】
〔１〕供試材の製作
耐熱鋼（ 0.4Ｃ-20.3 Ｎｉ-25.1 Ｃｒ- Ｆｅ, HK40相当材) からなる遠心力鋳造管材（機械加工後サイズ：外径50×長さ70×肉厚7,mm）を基材とし、その外側周面に溶射施工したうえ、溶射皮膜面に研磨加工を加えて供試材とする。
〔２〕溶融錫浴浸漬試験
上記円筒状供試材を垂直姿勢に保持し、その下部をフロートガラス製造ラインの溶融錫浴（浴温度：約６５０℃）に、４４日間浸漬する。
表１に、各供試材の溶射皮膜の組成、および浸漬試験の結果を示す。
【００１４】
供試材No.1〜５は発明例、No.11 〜17は比較例であり、
No.11 〜14は本発明と異なる組成を有するＭＣｒＡｌＸ系合金の溶射皮膜、
No.15 はステライト♯６合金（30%Cr-4%W-1%C-Co) の溶射皮膜、
No.16 はサーメットからなる溶射皮膜、
No.17 は溶射皮膜の形成を省略した例である。
溶射施工は、いずれもジェットコート溶射法で行い、溶射皮膜厚は0.1 mmとした。
【００１５】
表中、「皮膜表面状態」の欄は、溶射皮膜面の溶融錫の付着、および膜表面の腐食損傷状態の目視観察結果、「溶融錫浸透状況」の欄は、溶融錫の膜内透過状況のＥＰＭＡによる観察結果であり、各欄の記号は下記のとおりである。
「基材の反応層厚」欄の数値は、皮膜を透過した溶融錫の腐食作用により生じた基材表面の腐食層厚（μｍ）を示している。
「錫付着状況」欄
○…付着皆無ないし極微量、膜の腐食損傷なし
△…部分的な付着および軽微の腐食反応が観察される
×…比較的広い領域に亘つて付着、腐食反応顕著
「溶融錫侵入状況」
○…侵入なし
△…微量の浸透あり
×…浸透顕著
【００１６】
【表１】
表１に示したように、従来材に相当するNo.17(ＨＫ40相当材の円筒体、溶射皮膜なし）は、溶融錫の腐食作用による著しい表面損傷が生じている。ＥＰＭＡによれば、その腐食反応層はＮｉ分の略全量が溶出し、Ｓｎに置換された組織に変化していることが観察される。表面の錫の付着も顕著である。
No.11 〜14（ＭＣｒＡｌＸ合金系の溶射皮膜を形成）のうち、No.11 〜13は、皮膜面の錫の付着，腐食損傷，錫の浸透等と、基材の腐食損傷を生じ、No.14 では基材の腐食には至っていないものの、錫の付着, 膜内への侵入および膜面の腐食を生じている。
また、No.15 （ステライト合金の溶射皮膜形成）、およびNo.16 （WC-Co 系サーメットの溶射皮膜形成) では、溶融錫の付着、皮膜の腐食および錫の侵入を生じ、基材にも腐食反応が生じている。
これに対し、発明例No.1〜５は、皮膜面の錫の付着、腐食および侵入は殆ど観察されず、基材の腐食防止効果もほぼ完全に達成されている。
【００１８】
【発明の効果】
本発明のフロートガラス製造用ロールは、溶射皮膜の被覆保護効果として、溶融錫に対する改良された腐食抵抗性を有し、溶融錫の付着や膜内への浸透が抑制防止され、平滑美麗な表面状態を保持することができ、ガラス品質の高位安定化、ロールメンテナンスの軽減、および生産性の向上等に寄与するものである。
【図面の簡単な説明】
【図１】図１は本発明ロールの断面構造を模式的に示す軸方向断面図である。
【符号の説明】
１１：胴部基材
１２：溶射皮膜
１５：ロール軸。[0001]
[Industrial application fields]
The present invention relates to improvement in durability of transport rolls such as lift-out rolls and rare rolls in a sheet glass float production line.
[0002]
[Prior art]
In a glass sheet float production line, molten glass supplied from a glass melting furnace to a molten tin (Sn) bath becomes a flat and smooth glass ribbon having a predetermined thickness and width dimension while floating forward on the surface of the tin bath. Then, it is led out from the tin bath, carried on a transport roll such as a lift-out roll or a rare roll, and transferred to the slow cooling zone.
Since the transport roll such as the lift-out roll is in contact with the glass ribbon in a high temperature state and is exposed to a high temperature of about 600 to 650 ° C., the roll body is made of HK40 material (25Cr-20Ni-Fe) or HH. What was formed with heat-resistant alloy steel, such as material (13Cr-26Ni-Fe), is used.
[0003]
[Problems to be solved by the invention]
As for the conveyance roll of a float glass manufacturing line, molten tin adheres to the roll trunk | drum surface by the contact of the glass ribbon which passed the tin bath. Molten tin is extremely corrosive enough to corrode most stainless steels. For this reason, the trunk | drum of a conveyance roll tends to produce surface degradation, such as rough skin by a corrosive action of molten tin, an unevenness | corrugation.
When the roll body surface deteriorates due to corrosion, the surface state is transferred to the lower surface of the glass ribbon, and the corrosion reaction products contaminate the glass ribbon, resulting in inconveniences such as reduced glass quality and production yield. It will be a cause.
The present applicant, as a measure for improving the corrosion resistance of the above-mentioned transport rolls against molten tin, has already filed a Co—Cr—Al—Y alloy (Cr: 15-30%, Al; 5-16%, Y; 0.1- 1%, Co; Bal) was formed on the surface of the roll body portion to provide a transport roll having improved corrosion resistance due to its coating protection effect (Japanese Patent Laid-Open No. 4-260629).
This invention provides the conveyance roll for the float glass manufacture which improved further the corrosion resistance with respect to the molten tin of the said thermal spray coating.
[0004]
[Means for Solving the Problems]
The roll for producing a float glass of the present invention comprises:
Cobalt alloy consisting of Cr: 10 to 40%, Al: 2 to 20%, Ti: 2 to 20%, Y: 0.1 to 2% and the balance substantially consisting of Co on the surface of the metal base of the roll body A thermal spray coating is formed.
[0005]
[Action]
MCrAlX alloy system [M: iron group elements (Fe, Co, Ni), Cr, Al: oxide film forming elements, X: elements that reinforce oxide films (rare earth elements, etc.)] are used as heat-resistant materials for gas turbine blades, etc. Although it is a known grade, the Co-Cr-Al-Ti-Y alloy having the above-mentioned component structure based on this alloy system has the above-mentioned properties in terms of wettability to molten tin, resistance to corrosion reactions, etc. It exhibits outstanding properties that surpass the Co—Cr—Al—Y alloy disclosed in the publication.
The transport roll of the present invention has a high resistance to adhesion of molten tin, corrosion damage, permeation through the film, etc. as a coating protection effect of the above-mentioned thermal spray coating formed on the surface of the barrel portion. The healthy surface state of the part is stably maintained.
[0006]
The reasons for limiting the components of the thermal spray coating alloy for covering and protecting the roll body of the present invention are as follows.
Cr: 10 to 40%
Cr forms a Cr 2 O 3 film, which is a protective oxide film, and provides corrosion resistance to molten tin. Also, activating Al, it promotes the formation of the Al 2 O 3 film. This effect is obtained by addition of 10% or more. However, if it exceeds 40%, the ductility of the sprayed coating becomes poor, and cracking / peeling due to thermal shock or the like tends to occur in actual use, so this is the upper limit.
[0007]
Al: 2 to 20%
Al forms a protective oxide film of Al 2 O 3 to enhance the corrosion resistance against molten tin. To obtain this effect, at least 2% is required. However, if the amount increases, it causes difficulty in thermal spraying (such as cracking of the coating during thermal spraying), so it should not exceed 20%.
[0008]
Ti: 2 to 20%
Ti forms a protective oxide film of TiO 2 and strengthens the corrosion resistance against molten tin. This effect can be obtained by addition of 2% or more. However, if it is added in a large amount, the thermal shock resistance of the sprayed coating is lowered, leading to insufficient crack resistance and peelability. For this reason, 20% is made the upper limit.
[0009]
Y: 0.1 to 2%
The addition of Y to the Co—Cr—Al system enhances the adhesion of the oxide film, the high temperature corrosion resistance, the ability to prevent diffusion and penetration of molten tin, and strengthens the protective film function. This effect can be obtained by adding Y in an amount exceeding the solid solubility limit (Co 3 Y preferentially precipitates on the grain boundary). For this reason, Y needs addition of 0.1% or more. However, if added in a large amount, the ductility is lowered, so 2% is made the upper limit.
[0010]
Co: The balance component Co is a stable element having a low reactivity with molten tin, among iron group elements. By using Co as a balance component, it is possible to ensure a high degree of corrosion resistance against molten tin.
[0011]
Thermal spraying for forming the above-described cobalt-based alloy sprayed coating on the surface of the roll body can be performed by applying various thermal spraying methods such as gas plasma spraying, water plasma spraying, jet coat spraying, and arc spraying. In particular, gas plasma spraying and jet coat spraying are advantageous in that a highly dense film (porosity of about 5 to 10%) can be formed. The film thickness of the thermal spray coating may be about 0.05 to 0.5 mm.
Of course, the material of the base material of the roll body portion may be the same heat-resistant alloy steel (HK40, HH material, etc.) as the conventional roll body member, but in the present invention, as the coating protection effect of the sprayed coating, Since the contact with the glass ribbon and the atmospheric gas is cut off, it is not necessary to have the high heat resistance required for conventional rolls, and an alloy steel having a lower grade can be applied.
[0012]
FIG. 1 schematically shows a cross-sectional structure of the roll of the present invention. (11) is a body base material, and shaft members (15, 15) are fitted and fixed to openings at both ends. (12) is a thermal spray coating that covers and protects the surface of the body base material (11).
The transport roll is provided with a shaft member (15,15) attached to a cylindrical body (for example, a centrifugal cast pipe subjected to machining) as a body base material (11), and a body base material (11) Appropriate pretreatment (sand blasting, etc. to improve the adhesion of the thermal spray coating) is applied to the surface of the coating, followed by thermal spraying, followed by finishing such as grinding and polishing on the surface of the thermal spray coating (12). Manufactured.
[0013]
【Example】
[1] Manufacture of test material Centrifugal cast pipe material made of heat-resistant steel (0.4C-20.3 Ni-25.1 Cr-Fe, HK40 equivalent material) (size after machining: outer diameter 50 x length 70 x wall thickness 7, mm) is used as a base material, and thermal spraying is applied to the outer peripheral surface of the base material, and then a polishing process is applied to the surface of the thermal spray coating to prepare a specimen.
[2] Molten tin bath immersion test The cylindrical specimen is held in a vertical position, and the lower part thereof is immersed in a molten tin bath (bath temperature: about 650 ° C.) of a float glass production line for 44 days.
Table 1 shows the composition of the sprayed coating of each specimen and the results of the immersion test.
[0014]
Sample Nos. 1 to 5 are invention examples, Nos. 11 to 17 are comparative examples,
Nos. 11 to 14 are sprayed coatings of MCrAlX alloys having a composition different from that of the present invention,
No.15 is a sprayed coating of Stellite # 6 alloy (30% Cr-4% W-1% C-Co)
No.16 is a thermal spray coating made of cermet,
No. 17 is an example in which the formation of a sprayed coating is omitted.
The thermal spraying was carried out by the jet coat thermal spraying method, and the thermal spray coating thickness was 0.1 mm.
[0015]
In the table, the “film surface state” column is the result of visual observation of the adhesion of molten tin on the sprayed coating surface and the corrosion damage state of the film surface, and the “molten tin penetration state” column is the state of permeation of molten tin into the film. The observation results by EPMA are as follows. Symbols in each column are as follows.
The numerical value in the column “Reaction Layer Thickness of Substrate” indicates the thickness (μm) of the corrosion layer on the surface of the substrate generated by the corrosive action of molten tin that has permeated the film.
“Tin adhesion status” column ○… No adhesion or trace amount, no film corrosion damage △… Partial adhesion and slight corrosion reaction are observed ×… Adhesion and corrosion reaction over a relatively wide area Tin Invasion Status "
○… No intrusion △… Small amount of penetration ×… Prominent penetration [0016]
[Table 1]
As shown in Table 1, No.17 (cylindrical body of HK40 equivalent material, no thermal spray coating) corresponding to the conventional material has a remarkable surface damage due to the corrosive action of molten tin. According to EPMA, it is observed that the corrosion reaction layer is changed into a structure in which almost the entire amount of Ni is eluted and replaced with Sn. The adhesion of tin on the surface is also remarkable.
Of No. 11 to 14 (formation of MCrAlX alloy-based thermal spray coating), No. 11 to 13 cause corrosion of the base material, such as tin adhesion, corrosion damage, and tin penetration on the coating surface. In .14, although the substrate has not been corroded, tin adhesion, penetration into the film and corrosion of the film surface occur.
In No. 15 (formation of sprayed coating of stellite alloy) and No. 16 (formation of thermal sprayed coating of WC-Co cermet), adhesion of molten tin, corrosion of the coating and intrusion of tin occurred. Corrosion reaction has occurred.
On the other hand, in Invention Examples No. 1 to 5, almost no adhesion, corrosion and penetration of tin on the coating surface was observed, and the corrosion prevention effect of the base material was almost completely achieved.
[0018]
【The invention's effect】
The roll for producing a float glass of the present invention has an improved corrosion resistance against molten tin as a coating protective effect of a sprayed coating, and prevents adhesion of molten tin and penetration into the film, and is a smooth and beautiful surface. The state can be maintained, which contributes to high glass quality stabilization, roll maintenance reduction, productivity improvement, and the like.
[Brief description of the drawings]
FIG. 1 is an axial sectional view schematically showing a sectional structure of a roll of the present invention.
[Explanation of symbols]
11: Body part base material 12: Thermal spray coating 15: Roll axis.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32214894A JP3664450B2 (en) | 1994-12-26 | 1994-12-26 | Float glass manufacturing roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32214894A JP3664450B2 (en) | 1994-12-26 | 1994-12-26 | Float glass manufacturing roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08175828A JPH08175828A (en) | 1996-07-09 |
| JP3664450B2 true JP3664450B2 (en) | 2005-06-29 |
Family
ID=18140472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32214894A Expired - Fee Related JP3664450B2 (en) | 1994-12-26 | 1994-12-26 | Float glass manufacturing roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3664450B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003137613A (en) * | 2001-10-26 | 2003-05-14 | Nippon Sheet Glass Co Ltd | Vacuum double-glazing unit |
| EP1806419B1 (en) * | 2006-01-10 | 2009-08-26 | Siemens Aktiengesellschaft | Alloy, protective coating for protecting a structural member against corrosion and oxidation at high temperatures and structural member |
| EP2366674A4 (en) * | 2008-12-16 | 2013-08-14 | Asahi Glass Co Ltd | Filmed metal member for float glass manufacturing equipment and float glass manufacturing method |
| EP3561143B1 (en) * | 2016-12-21 | 2023-08-16 | Agc Inc. | Method for forming thermal spraying coating film of intermetallic compound, thermal spraying coating film, method for producing metal product having spray coating film and glass-conveying roll |
| CN107790493A (en) * | 2017-10-23 | 2018-03-13 | 陕西海恩得工贸有限公司 | A kind of milling method of stud |
-
1994
- 1994-12-26 JP JP32214894A patent/JP3664450B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08175828A (en) | 1996-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5390104B2 (en) | Method for coating steel strip and steel strip with said coating | |
| EP1951932B1 (en) | Method of coating metal sheet | |
| JP6762879B2 (en) | Steel plate with a coating that provides sacrificial cathodic protection containing lanterns | |
| WO2018216589A1 (en) | Member for hot-dip metal plating bath | |
| JP3664450B2 (en) | Float glass manufacturing roll | |
| US6613452B2 (en) | Corrosion resistant coating system and method | |
| JP3379041B2 (en) | Equipment in plating bath and manufacturing method | |
| EP0570219B1 (en) | Use of a molten zinc resistant alloy | |
| JP2758707B2 (en) | Thermal spray coating for hot dip galvanizing bath | |
| JP2000233986A (en) | Member for plating bath and its production | |
| JP3092820B2 (en) | Float glass manufacturing roll | |
| JP3092818B2 (en) | Float glass manufacturing roll | |
| JP2612127B2 (en) | Hot-dip galvanizing bath immersion member with excellent durability | |
| JPH0776763A (en) | Member for galvanization bath excellent in resistance to blocking to alloy layer, its preparation and hot dip galvanization therewith | |
| JPH0681099A (en) | Galvannealed steel sheet | |
| EP3918104B1 (en) | Use of a dlc coated part in a galvanizing bath | |
| JP2011032497A (en) | Surface-treated steel sheet for hot pressing and method for manufacturing hot-pressed member using the same | |
| JPH06212379A (en) | Production of immersing member into hot dip galvanizing bath and its production | |
| JP2002105615A (en) | HOT-DIP Sn-Mg COATED STEEL SHEET | |
| JP2962973B2 (en) | Hot dip galvanizing equipment materials | |
| JP3092819B2 (en) | Float glass manufacturing roll | |
| JP3207958B2 (en) | Composite Al alloy plated steel sheet and method for producing the same | |
| JP3284953B2 (en) | Metal member for continuous hot-dip galvanizing apparatus, method for producing the same, and continuous hot-dip galvanizing apparatus | |
| JP2000256825A (en) | Sliding member for zinc-aluminum hot-dip bath | |
| JPH05106071A (en) | Method for repairing hot-dip metal coating bath immersion member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050325 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050328 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080408 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090408 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090408 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100408 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100408 Year of fee payment: 5 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100408 Year of fee payment: 5 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |