JPH05311369A - Member for immersing in galvanizing bath excellent in durability - Google Patents
Member for immersing in galvanizing bath excellent in durabilityInfo
- Publication number
- JPH05311369A JPH05311369A JP4053698A JP5369892A JPH05311369A JP H05311369 A JPH05311369 A JP H05311369A JP 4053698 A JP4053698 A JP 4053698A JP 5369892 A JP5369892 A JP 5369892A JP H05311369 A JPH05311369 A JP H05311369A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- sio2
- hot
- coating
- al2o3
- 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.)
- Granted
Links
Landscapes
- Coating With Molten Metal (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融亜鉛めっき浴内で
使用されるシンクロール、サポートロールおよびこれら
の軸、軸受け等の溶融亜鉛に対する耐久性を向上せしめ
る技術に関するものであり、耐久性に優れた溶融亜鉛め
っき浴浸漬用部材を提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for improving the durability of sink rolls, support rolls and their shafts and bearings used in a hot dip galvanizing bath against hot dip zinc. An excellent member for dipping in a hot dip galvanizing bath is provided.
【０００２】[0002]
【従来の技術】溶融亜鉛めっき鋼板の用途が自動車、家
電用外板にまで拡大し、製品に対する表面品位の要求レ
ベルは従来にくらべて著しく厳格化してきた。しかして
溶融亜鉛めっき装置としては、例えば、図１に示すごと
く、鋼帯１をめっき浴２中へ導き、シンクロール３、サ
ポートロール４を介してめっきし上部へ引き上げるもの
である。このような溶融亜鉛めっき浴内で使用されるシ
ンクロール、サポートロールおよびこれらの軸、軸受け
部材としては、高Ｃｒ−Ｎｉステンレス系材料が使用さ
れてきたが、これらめっき浴浸漬部材は、使用と共に、
表面が溶融亜鉛に浸食される（粒界亜鉛脆化）、浴
成分との合金化反応による合金層の形成、あるいは、
可撓部でのミクロスリップによる摩耗の結果、表面に凹
凸を生ずる。かかる部材表面の劣化はめっき製品の表面
品位低下に結びつくことから、厳格製品の生産量増加と
共にロール等亜鉛めっき浴浸漬部材の取替え頻度は高ま
り、生産性低下を招いていた。2. Description of the Related Art The use of hot-dip galvanized steel sheets has been expanded to automobiles and outer panels for home appliances, and the required level of surface quality for products has become significantly stricter than in the past. However, as a hot dip galvanizing apparatus, for example, as shown in FIG. 1, a steel strip 1 is introduced into a plating bath 2, plated through a sink roll 3 and a support roll 4, and pulled up. High Cr-Ni stainless steel materials have been used as sink rolls, support rolls and their shafts and bearing members used in such hot dip galvanizing baths. ,
Surface is eroded by molten zinc (grain boundary zinc embrittlement), formation of alloy layer by alloying reaction with bath components, or
As a result of wear due to micro-slip on the flexible part, unevenness occurs on the surface. Since the deterioration of the surface of the member leads to the deterioration of the surface quality of the plated product, as the production amount of the strict product increases, the frequency of replacement of the galvanizing bath dipping member such as the roll increases and the productivity deteriorates.
【０００３】最近では、かかる問題を改善するためにＷ
Ｃ−Ｃｏ系溶射被覆を施す技術が開示されている（特開
平２−１２５８３３号公報）が、該技術をもってしても
亜鉛メッキ浴浸漬部材の寿命は２週間〜２か月であり十
分ではない。Recently, in order to improve such a problem, W
A technique of applying a C—Co-based thermal spray coating is disclosed (JP-A-2-125833), but even with this technique, the life of the zinc plating bath immersion member is 2 weeks to 2 months, which is not sufficient. ..
【０００４】また、セラミック系材料の溶射に関しても
検討が加えられているが、いずれも溶融亜鉛に対する耐
食性、皮膜の割れ、剥離等の問題が解決されるに至って
いない。Further, although thermal spraying of ceramic materials has been studied, none of them has solved problems such as corrosion resistance to molten zinc, cracking of the coating, and peeling.
【０００５】特開昭６０−２９４５７号公報には亜鉛浴
浸漬部材表面に酸化物系成分を主体とする陶磁器、ほう
ろう用釉薬を被覆形成せしめる技術が開示されている
が、最近の要求レベルに対しては更に改善が必要であ
る。Japanese Unexamined Patent Publication (Kokai) No. 60-29457 discloses a technique for coating the surface of a zinc bath-immersed member with a ceramic mainly containing an oxide component and a glaze for enamel. Further improvement is needed.
【０００６】[0006]
【発明の目的】本発明はかかる問題を解決するため、溶
融亜鉛に対する耐久寿命に優れた溶融亜鉛めっき浴浸漬
用部材を提供し、該部材の使用寿命を向上せしめるもの
である。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a member for dipping in a hot dip galvanizing bath, which has an excellent durability life against hot dip zinc, and improves the service life of the member.
【０００７】[0007]
【発明の構成】本発明者等は、上記問題点を解決するた
め種々の研究を行い、耐食性（耐粒界亜鉛脆化、耐合金
化）、耐摩耗性および耐剥離性（皮膜の密着性）に優れ
た表面溶射層を発明するに到ったものである。The present inventors have conducted various studies in order to solve the above problems, and have conducted corrosion resistance (grain boundary zinc embrittlement resistance, alloying resistance), wear resistance and peel resistance (coating adhesion). The present invention has led to the invention of a surface sprayed layer excellent in
【０００８】すなわち、本発明の要旨は、（１） 部材
表面にＡｌ2 Ｏ3 、ＳｉＯ2 、ＴｉＯ2 、ＭｇＯ、Ｚｒ
Ｏ2 、Ｃｒ2 Ｏ3 、ＣａＯ、ＳｉＣ、ＳｉＮの１種ある
いは２種以上からなる溶射被覆を施したことを特徴とす
る耐久性に優れた溶融亜鉛めっき浴浸漬用部材にあり、
また、（２） 前記（１）項の発明において 溶射被覆
がＡｌ2 Ｏ3 、ＳｉＯ2 によって構成され、ＳｉＯ2 の
含有率が５〜７０重量％であることを特徴とする耐久性
に優れた溶融亜鉛めっき浴浸漬用部材である。That is, the gist of the present invention is (1) Al 2 O 3 , SiO 2 , TiO 2 , MgO, Zr on the surface of the member.
A member for immersion in a hot dip galvanizing bath, which is characterized by having a thermal spray coating made of one or more of O 2 , Cr 2 O 3 , CaO, SiC, and SiN,
(2) In the invention of the above item (1), the thermal spray coating is made of Al 2 O 3 and SiO 2 , and the content of SiO 2 is 5 to 70% by weight, which is excellent in durability. It is a member for dipping in a hot dip galvanizing bath.
【０００９】Ａｌ2 Ｏ3 、ＳｉＯ2 、ＴｉＯ2 、Ｍｇ
Ｏ、ＺｒＯ2 、Ｃｒ2 Ｏ3 、ＣａＯ等の酸化物は溶射被
覆成分として既知のものであるが、本発明者等は研究の
結果、酸化物の中でも特にこれらが溶融亜鉛めっき浴浸
漬部材用皮膜として優れることを見いだした。同様に金
属炭化物、窒化物の中でＳｉＣ、ＳｉＮが同等の特性を
有するとの知見を得たものである。Al 2 O 3 , SiO 2 , TiO 2 , Mg
Oxides such as O, ZrO 2 , Cr 2 O 3 and CaO are known as thermal spray coating components, but as a result of research by the present inventors, among the oxides, these are especially for hot dip galvanizing bath dipping members. It was found to be excellent as a film. Similarly, among the metal carbides and nitrides, it was found that SiC and SiN have the same characteristics.
【００１０】Ａｌ2 Ｏ3 、ＳｉＯ2 が溶融亜鉛浴中で優
れた耐久性を有する最大の理由は、溶融亜鉛に対する濡
れ性がよい、即ち、亜鉛中での潤滑性がよいことから使
用中の耐摩耗性に優れる点である。併せて、溶融亜鉛と
の反応性も低く、耐粒界亜鉛脆化、耐合金化性など耐食
性についても良好である。The biggest reason that Al 2 O 3 and SiO 2 have excellent durability in a molten zinc bath is that they have good wettability with molten zinc, that is, they have good lubricity in zinc, It is excellent in abrasion resistance. At the same time, the reactivity with molten zinc is low, and the corrosion resistance such as grain boundary zinc embrittlement resistance and alloying resistance is also good.
【００１１】溶射被覆をＡｌ2 Ｏ3 、ＳｉＯ2 によって
構成する場合には、ＳｉＯ2 の含有率を５〜７０重量％
とすることが最も望ましい。Ａｌ2 Ｏ3 、ＳｉＯ2 は熱
膨張率、延性、硬度が異なるため、これらを複合溶射す
ることにより浴内浸漬過程もしくは浴から取り出す過
程、換言すれば加熱、冷却中の耐剥離性が向上する。Ｓ
ｉＯ2 は含有率が５重量％未満、７０重量％超ではかか
る効果が十分に得られない。When the thermal spray coating is made of Al 2 O 3 and SiO 2 , the content of SiO 2 is 5 to 70% by weight.
Is most desirable. Since Al 2 O 3 and SiO 2 have different coefficients of thermal expansion, ductility, and hardness, composite spraying of these improves the resistance to peeling during the process of dipping in the bath or the process of removing from the bath, in other words, during heating and cooling. .. S
If the content of iO 2 is less than 5% by weight or more than 70% by weight, such effect cannot be sufficiently obtained.
【００１２】ＳｉＣ、ＳｉＮは、溶射被覆成分として溶
融亜鉛中での耐食性の観点で最も優れた特性を有する。SiC and SiN have the most excellent properties as a spray coating component from the viewpoint of corrosion resistance in molten zinc.
【００１３】ＴｉＯ2 、ＭｇＯ、ＺｒＯ2 、Ｃｒ2 Ｏ
3 、ＣａＯ酸化物も同様に亜鉛に対する耐食性が良い。TiO 2 , MgO, ZrO 2 , Cr 2 O
3 , CaO oxide also has good corrosion resistance to zinc.
【００１４】特開昭６０−２９４５７号公報には亜鉛浴
浸漬部材表面に酸化物系成分（Ｎａ 2 Ｏ、Ｋ2 Ｏ、Ｂ2
Ｏ5 、ＳｉＯ2 、ＭｇＯ、ＣａＯ、Ａｌ2 Ｏ3 、ＺｒＯ
2 ）を主成分とする陶磁器、ほうろう用釉薬を被覆形成
せしめる技術が開示されている。該技術は浴浸漬部材の
耐久性を向上せしめる効果はあるものの、めっき鋼板の
表面品位に対する要求が極めて厳格化した最近では、そ
の品位を維持するための部材寿命要求値を更に高める必
要がある。本発明は酸化物系皮膜、炭化物系皮膜、窒化
物系皮膜の溶射処理による耐久性向上技術を提供するも
のであり、釉薬被覆法と比較して耐久性が一段と優れ
る。この理由は溶射処理で得た本発明の皮膜が該開示技
術と比較して緻密で硬度が高く、溶融亜鉛浴での耐食
性、耐摩耗性に優れるためである。JP-A-60-29457 discloses a zinc bath.
Oxide-based components (Na 2 O, K2 O, B2
OFive , SiO2 , MgO, CaO, Al2 O3 , ZrO
2 ) -Based ceramics, glazing for enamel coating
The technology which has been disclosed is disclosed. The technique is for bath dipping
Although it has the effect of improving durability,
In recent years, when the requirements for surface quality have become extremely strict,
It is necessary to further increase the member life requirement value in order to maintain the quality of
There is a point. The present invention is an oxide-based film, a carbide-based film, nitriding
We also provide technology for improving durability by thermal spraying of physical coatings.
Therefore, it is much more durable than the glaze coating method.
It The reason for this is that the coating of the present invention obtained by the thermal spraying treatment is the disclosed technique.
Dense and high hardness compared to surgery, corrosion resistance in molten zinc bath
This is because it has excellent wear resistance and wear resistance.
【００１５】本発明における溶射皮膜の厚みは、５〜５
００μｍとする必要がある。５μｍ未満では亜鉛浴中部
材の寿命向上効果が小さく、５００μｍを超える厚さで
は熱衝撃に対する溶射皮膜の密着性が低下する。The thickness of the sprayed coating in the present invention is 5 to 5
It is necessary to set it to 00 μm. If it is less than 5 μm, the effect of improving the life of the member in the zinc bath is small, and if it exceeds 500 μm, the adhesion of the thermal spray coating to thermal shock is reduced.
【００１６】溶射皮膜の成分としては、Ａｌ2 Ｏ3 、Ｓ
ｉＯ2 、ＴｉＯ2 、ＭｇＯ、ＺｒＯ2 、Ｃｒ2 Ｏ3 、Ｃ
ａＯ、ＳｉＣ、ＳｉＮから選ばれる１種あるいは２種以
上とすればよく、全ての組み合わせが可能である。The components of the thermal spray coating include Al 2 O 3 and S.
iO 2 , TiO 2 , MgO, ZrO 2 , Cr 2 O 3 , C
It may be one kind or two kinds or more selected from aO, SiC, and SiN, and all combinations are possible.
【００１７】溶射を施す母材ロールの成分に関しては、
特に規定する必要がない。１２Ｃｒ系ステンレス鋼、２
５Ｃｒ−１２Ｎｉ系ステンレス鋼をはじめ通常のロール
素材に適用可能である。Regarding the components of the base material roll to be sprayed,
It does not need to be specified. 12Cr stainless steel, 2
It can be applied to ordinary roll materials including 5Cr-12Ni stainless steel.
【００１８】溶射の方法、溶射後の熱処理等については
特に規定する必要はなく、通常のプラズマ溶射をはじめ
とする方法を適用することができる。The method of thermal spraying, the heat treatment after thermal spraying, etc. need not be specified in particular, and methods such as ordinary plasma thermal spraying can be applied.
【００１９】表面粗さをはじめとする表面仕上げに関し
ても特に規定する必要はなく、全ての仕様に適用可能で
ある。The surface finish including the surface roughness does not have to be specified, and it can be applied to all specifications.
【００２０】このような本発明による部材は、溶融亜鉛
めっき浴のサポートロール、シンクロール等の浸漬部材
として用いることができる。The member according to the present invention as described above can be used as a dipping member such as a support roll or a sink roll of a hot dip galvanizing bath.
【００２１】[0021]
【実施例】２５Ｃｒ−１２Ｎｉ系ステンレス鋼を母材と
する２５０φのサポートロールに対して表１に示す各組
成の表面溶射層を施した。溶射皮膜の厚みは２００μ
ｍ、溶射後の表面粗度はＲａ＝３．０μｍ。Example A surface-sprayed layer having each composition shown in Table 1 was applied to a support roll of 250φ using 25Cr-12Ni stainless steel as a base material. Thickness of sprayed coating is 200μ
m, the surface roughness after thermal spraying is Ra = 3.0 μm.
【００２２】連続溶融亜鉛めっきラインのめっき浴中で
使用し、耐久寿命を測定した。めっき浴の組成はＡｌ：
０．１４重量％、Ｆｅ：０．０３重量％、残部Ｚｎおよ
び不可避的不純物であり、めっき浴温度は４６０℃であ
る。寿命の判定は、めっき鋼板にすり疵が発生した時点
とした。It was used in a plating bath of a continuous hot-dip galvanizing line, and its durable life was measured. The composition of the plating bath is Al:
0.14% by weight, Fe: 0.03% by weight, balance Zn and inevitable impurities, and the plating bath temperature is 460 ° C. The life was determined at the time when the plated steel sheet had scratches.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】以上の如く、本発明の溶融亜鉛めっき浴
浸漬部材を用いることにより該部材の耐久寿命が大幅に
向上し、生産性の向上が可能となる。加えて、浴浸漬部
材の表面品位が安定し、めっき鋼板表面品質の安定維持
に貢献するものである。As described above, by using the hot dip galvanizing bath dipping member of the present invention, the durability life of the member is greatly improved and the productivity can be improved. In addition, the surface quality of the bath-immersed member is stable, which contributes to stable maintenance of the surface quality of the plated steel sheet.
【図１】溶融亜鉛メッキ装置の該概略図。FIG. 1 is a schematic view of a hot dip galvanizing apparatus.
１…鋼帯 ２…めっき浴 ３…シンクロール ４…サポートロール 1 ... Steel strip 2 ... Plating bath 3 ... Sink roll 4 ... Support roll
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大藏隆彦 東京都港区虎ノ門２丁目10番１号 日本鉱 業株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takahiko Ozura 2-10-1 Toranomon, Minato-ku, Tokyo Inside Japan Mining Co., Ltd.
Claims (2)
Ｏ2 、ＭｇＯ、ＺｒＯ2 、Ｃｒ2 Ｏ3 、ＣａＯ、Ｓｉ
Ｃ、ＳｉＮの１種あるいは２種以上からなる溶射被覆を
施したことを特徴とする耐久性に優れた溶融亜鉛めっき
浴浸漬用部材。1. An Al 2 O 3 , SiO 2 , Ti film on the surface of a member.
O 2 , MgO, ZrO 2 , Cr 2 O 3 , CaO, Si
A member for dipping in a hot dip galvanizing bath having excellent durability, which is characterized in that a thermal spray coating made of one or more of C and SiN is applied.
て構成され、ＳｉＯ2 の含有率が５〜７０重量％である
ことを特徴とする請求項１記載の耐久性に優れた溶融亜
鉛めっき浴浸漬用部材。 2. The hot-dip galvanized article having excellent durability according to claim 1, wherein the thermal spray coating is composed of Al 2 O 3 and SiO 2 , and the content of SiO 2 is 5 to 70% by weight. A member for bath immersion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4053698A JP2612127B2 (en) | 1992-03-12 | 1992-03-12 | Hot-dip galvanizing bath immersion member with excellent durability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4053698A JP2612127B2 (en) | 1992-03-12 | 1992-03-12 | Hot-dip galvanizing bath immersion member with excellent durability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05311369A true JPH05311369A (en) | 1993-11-22 |
| JP2612127B2 JP2612127B2 (en) | 1997-05-21 |
Family
ID=12950039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4053698A Expired - Lifetime JP2612127B2 (en) | 1992-03-12 | 1992-03-12 | Hot-dip galvanizing bath immersion member with excellent durability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2612127B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049364A1 (en) * | 1997-04-28 | 1998-11-05 | Nippon Steel Hardfacing Co., Ltd. | Member for molten metal bath, provided with composite sprayed coating having excellent corrosion resistance and peeling resistance against molten metal |
| JP2000233986A (en) * | 1999-02-15 | 2000-08-29 | Tocalo Co Ltd | Member for plating bath and its production |
| FR2816325A1 (en) * | 2000-11-07 | 2002-05-10 | A F Electrification | Preservation of a support component for a galvanization operation by coating with a ceramic insensitive to the galvanization bath |
| CN104152838A (en) * | 2014-07-16 | 2014-11-19 | 江苏南山冶金机械制造有限公司 | Ceramic sink roller and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54101041A (en) * | 1977-12-27 | 1979-08-09 | Pfister Gmbh | Hydrostatic controller |
| JPS6441727U (en) * | 1987-09-09 | 1989-03-13 | ||
| JPH04112973A (en) * | 1990-08-31 | 1992-04-14 | Shimadzu Corp | Radial pump or motor |
-
1992
- 1992-03-12 JP JP4053698A patent/JP2612127B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54101041A (en) * | 1977-12-27 | 1979-08-09 | Pfister Gmbh | Hydrostatic controller |
| JPS6441727U (en) * | 1987-09-09 | 1989-03-13 | ||
| JPH04112973A (en) * | 1990-08-31 | 1992-04-14 | Shimadzu Corp | Radial pump or motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049364A1 (en) * | 1997-04-28 | 1998-11-05 | Nippon Steel Hardfacing Co., Ltd. | Member for molten metal bath, provided with composite sprayed coating having excellent corrosion resistance and peeling resistance against molten metal |
| JP2000233986A (en) * | 1999-02-15 | 2000-08-29 | Tocalo Co Ltd | Member for plating bath and its production |
| JP4571250B2 (en) * | 1999-02-15 | 2010-10-27 | トーカロ株式会社 | Roll for molten metal plating bath and method for producing the same |
| FR2816325A1 (en) * | 2000-11-07 | 2002-05-10 | A F Electrification | Preservation of a support component for a galvanization operation by coating with a ceramic insensitive to the galvanization bath |
| CN104152838A (en) * | 2014-07-16 | 2014-11-19 | 江苏南山冶金机械制造有限公司 | Ceramic sink roller and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2612127B2 (en) | 1997-05-21 |
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Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19961217 |