EP0548469B2 - Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung - Google Patents
Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung Download PDFInfo
- Publication number
- EP0548469B2 EP0548469B2 EP19920116006 EP92116006A EP0548469B2 EP 0548469 B2 EP0548469 B2 EP 0548469B2 EP 19920116006 EP19920116006 EP 19920116006 EP 92116006 A EP92116006 A EP 92116006A EP 0548469 B2 EP0548469 B2 EP 0548469B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- nickel
- roller
- chromium
- approximately
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000009434 installation Methods 0.000 title claims 2
- 238000009713 electroplating Methods 0.000 title description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 17
- 230000007797 corrosion Effects 0.000 claims description 17
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 14
- 239000003792 electrolyte Substances 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 238000009750 centrifugal casting Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 2
- 239000004020 conductor Substances 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 239000010410 layer Substances 0.000 description 31
- 239000011241 protective layer Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
- C25D7/0657—Conducting rolls
Definitions
- the invention relates to a current guide roller for Electrolytic coil coating systems, consisting from a cylindrical roller shell Steel with a flange in each end a steel journal is shrunk in, with at least the shaft journals and their flanges with a conductive layer made of good electrical conductivity Metal, especially copper, are provided and up a sleeve made of corrosion-resistant Metal is shrunk onto the electrolytic one Hard chrome working layer is applied.
- Such current guide rollers are used for transmission high electrical currents in the order of magnitude from 10,000 to 20,000 A in coil coating systems with strongly corrosive electrolytes, for example Chromic acid with the addition of sodium fluoride.
- the electricity comes from a power source over the current guide roller to that in the coil coating system to be coated with metal Band, for example a steel band, initiated.
- the Power is supplied via power supply elements, that attack the shaft journal.
- the current then flows over the copper conductive layer to the roller shell and from there into that metal strip to be coated.
- Hard chrome layers are, as common is known with a network of micro cracks afflicted.
- the electrolyte can penetrate into these cracks and infiltrate the chrome layer what to a withdrawal of the same can result.
- the invention is therefore based on the object a current guide roller for electrolytic coil coating systems of the type mentioned at the beginning create at the signs of detachment of the Hard chrome layer, as well as surface corrosion and Pitting, can be avoided, and the one has a long service life.
- This task is done with a current guide roller of the type mentioned in that the rifle from a highly corrosion resistant Nickel-chrome-molybdenum alloy exists and that between the box and the Working layer a nickel pre-galvanization is galvanized onto the surface of the can.
- the one shrunk onto the roller shell and expediently welded to it Rifle made of a highly corrosion-resistant Nikkel-Chrom-Molybdenum alloy offers an effective and long-lasting protection against corrosion. Even if through the micro cracks of the hard chrome layer Electrolyte to the surface of the can arrives, there is no surface corrosion on the bush or pitting, so that the hard chrome layer cannot be infiltrated by the electrolyte. It will replace individual parts of the Hard chrome layer avoided and this can be yours Purpose long time until friction is worn out. The one that sticks permanently to the can Hard chrome layer ensures thanks to its hardness of approx. 1,100 HV for high wear resistance.
- the new current guide roller has a service life that is around is many times larger than that previously known Current guide rollers. As a result, the new Current guide rollers are replaced less often and there is less production loss. In addition, the time intervals between the restoration of the current guide roller longer and restoration takes one less work because the surface of the Rifle not caused by surface corrosion or pitting is damaged. To restore the current guide roller is therefore usually just a new hard chrome plating the working layer worn out by wear required.
- the invention also relates to a method for Production of a current guide roller in the claim 1 specified type.
- This procedure exists in that the sleeve made of nickel-chromium-molybdenum alloy shrunk onto the roller shell, if necessary on the face side with this tightly welded, then turned to the finished dimension and sanded, the sanded surface shot peened, electrolytically cleaned and degreased, then with a nickel pre-galvanization coated and finally the Hard chrome layer is applied electrolytically.
- the current guide roller 1 has a cylindrical hollow roller shell 2. At both ends of this Roll shell 2 is a flange 3 a shaft journal 4 shrunk, which is useful forms one piece with the shaft journal. Of the Flange 3 is also over a first weld 5 tightly connected to the roll shell 2. To remove those generated during electrolysis processes The hollow roller jacket from Cooling water to flow through, which by a central channel 6 of the one roll neck in the cavity enclosed by the roll shell 2 initiated and through each other's channel Roll neck is removed again. Possibly can also the cooling water on one and the same Side of the Stromleitwalze 1 fed and discharged if for this purpose the roll neck is provided with two channels.
- This guiding layer 7 is expedient in an uninterrupted Electroplating process applied.
- the conductive layer 7 can if necessary also on the outer surface of the roll shell 2 extend to the current conductivity to increase in the area of the roll shell. This also extends over the surface of the Roll jacket extending conductive layer is, however in the embodiment shown in the drawing not shown.
- the roll shell 2 is of a corrosion-resistant Protective layer in the form of a sleeve 8 surrounded by a highly corrosion resistant Nickel-chromium-molybdenum alloy.
- This Bush 8 is shrunk onto the roll shell and conveniently on both front sides via one second weld 9 tightly with the roll shell 2 welded.
- the sleeve 8 is useful in the centrifugal casting process from the highly corrosion resistant Nickel-chromium-molybdenum alloy manufactured.
- the inner surface of the Bush 8 finished to a degree, which slightly is smaller than the outside diameter of the Roll shell.
- the outer surface the sleeve 8 is turned.
- For shrinking the sleeve 8 is on the roll shell 2 this one filled with cold water while the Bush 8 heated to about 180 to 200 ° and with pushed about 160 to 180 ° over the roller jacket 2 becomes. Then the sleeve 8 is on their two ends by means of the weld 9 with welded the roll shell 2.
- the shrunk-on sleeve 8 is opened the finished dimension turned off and its surface by belt sanding with a surface roughness Ra of 0.5 ⁇ m.
- a working layer 10 made of hard chrome with a layer thickness of about 200 microns and one Hardness of approximately 1,100 HV electroplated.
- the nickel-chrome-molybdenum alloy the sleeve 8 the required high corrosion resistance it should be around 14 to 18% Chromium and about 14 to 18% molybdenum.
- the rifle should be made of a nickel-chrome-molybdenum alloy the one in the so-called "steel key (Publishing and distribution by StahlKey Wegst GmbH, D-7142 Marbach) under material no. 2.4610 specified type.
- a nickel-chrome-molybdenum alloy that about 0.015% C, about 16% Cr, about 15.5% Mo, to contains 0.7% Ti, up to 3% Fe, balance Ni, as proven to be particularly corrosion-resistant.
- Such highly corrosion-resistant nickel-chromium-molybdenum alloy is under the name HA-STELLOY C-4 (registered trademark) known (Source of supply from Haynes and Kokomo).
- the wall thickness of the sleeve 8 should according to her Finishing about 10 to 20 mm, preferably about 15 mm. It should also be noted that their finished diameter, for example Is 614 mm.
- the surface of the sleeve 8 after it has been turned to the finished size and was sanded, shot peened. Subsequently the surface is cleaned electrolytically and degreased and at the same time to a temperature heated from about 50 to 55 ° C.
- This electrolyte should preferably contain 200 g / l nickel chloride (NiCl 2 ), 80 ml / l 36% hydrochloric acid (HCL) and 50 g / l iron (Fe).
- the current density in this electrolyte should be about 1 to 10 A / dm 2 .
- the hard chrome layer produced should have a thickness of about 200 ⁇ m a hardness of approx.1,100 HV.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Description
- Figur 1
- einen Längsschnitt durch eine Hälfte der Stromleitwalze,
- Figur 2
- Einzelheiten an der Stelle II der Figur 1.
Claims (16)
- Stromleitwalze für elektrolytische Bandbeschichtungsanlagen, bestehend aus einem zylindrischen Walzenmantel aus Stahl, in dessen beide Enden jeweils ein Flansch eines Wellenzapfens aus Stahl eingeschrumpft ist, wobei zumindest die Wellenzapfen und ihre Flansche mit einer Leitschicht aus elektrisch gut leitendem Metall, insbesondere Hupfer, versehen sind und auf den Walzenmantel eine Büchse aus korrosionsbeständigem Metall aufgeschrumpft ist, auf die elektrolytisch eine Arbeitsschicht aus Hartchrom aufgebracht ist, dadurch gekennzeichnet, daß die Büchse (8) aus einer hochkorrosionsbeständigen Nickel-Chrom-Molybdän-Legierung besteht und daß zwischen der Büchse (8) und der Arbeitsschicht (10) eine Nickel-Vorgalvanisierung auf die Oberfläche der Büchse (8) aufgalvanisiert ist.
- Walze nach Anspruch 1, dadurch gekennzeichnet, daß die Büchse (8) an ihren beiden Stirnseiten mit dem Walzenmantel (2) dicht verschweißt ist.
- Walze nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Büchse (8) im Schleudergußverfahren hergestellt ist.
- Walze nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Nickel-Chrom-Molybdän-Legierung etwa 14 bis 18% Chrom und etwa 14 bis 18% Molybdän enthält.
- Walze nach Anspruch 1, 3 oder 4, dadurch gekennzeichnet, daß die Büchse (8) aus einer Nickel-Chrom-Molybdän-Legierung mit der Werkstoffnummer 2.4610 gemäß "Stahlschlüssel" besteht.
- Walze nach Anspruch 4, dadurch gekennzeichnet, daß die Nickel- Chrom-Molybdän-Legierung etwa 0.015%C, etwa 16%Cr, etwa 15,5% Mo, bis zu 0.7% Ti, bis zu 3% Fe, Rest Ni enthält.
- Walze nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß die Büchse (8) eine Wanddicke von etwa 10 bis 20 mm aufweist.
- Walze nach Anspruch 7, dadurch gekennzeichnet, daß die Wanddicke der Büchse (8) etwa 15 mm beträgt.
- Walze nach Anspruch 1 oder 8, dadurch gekennzeichnet, daß die Arbeitsschicht (10) aus Hartchromschicht eine Härte von etwa 1.100 HV (Vickers-Härte) aufweist.
- Walze nach einem der Ansprüche 1 - 9, dadurch gekennzeichnet, daß vor dem Aufschrumpfen der Büchse (8) auf den Walzenmantel (2), dieser, die Flansche (3) und die Wellenzapfen (4), mit einer zusammenhängenden Leitschicht (7) aus aufgalvanisiertem Kupfer versehen sind.
- Verfahren zur Herstellung einer Stromleitwalze nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Büchse aus der Nikkel-Chrom-Molybdän-Legierung auf den Walzenmantel aufgeschrumpft, gegebenenfalls stirnseitig mit diesem dicht verschweißt, dann auf das Fertigmaß abgedreht und geschliffen wird, die geschliffene Oberfläche stahlkugelgestrahlt, elektrolytisch gereinigt und entfettet, anschließend mit einer Nickel-Vorgalvanisierung beschichtet und schließlich darauf die Hartchromschicht elektrolytisch aufgebracht wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß die Büchse vor dem Aufbringen der Nickel-Vorgalvanisierung auf eine Temperatur von etwa 50 bis 55°C erwärmt wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß die Stromdichte beim Aufbringen der Nickel-Vorgalvanisierung bei einer Stromdichte von 1 bis 10 A/dm2 erfolgt.
- Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß zum Aufbringen der Nickel-Vorgalvanisierung ein Elektrolyt verwendet wird, der etwa 200 g/l Nickelchlorid (NiCl2), etwa 80 ml/l 36%ige Salzsäure (HCI) und 50 g/l Eisen (Fe) enthält.
- Verfahren nach einem der Ansprüche 11 - 14, dadurch gekennzeichnet, daß die mit der Nickel-Vorgalvanisierung versehene Oberfläche der Büchse in einem Eisen-III-Chlorid (FeCl3)-Bad aktiviert wird.
- Verfahren nach einem der Ansprüche 11 - 16, dadurch gekennzeichnet, daß die Hartverchromung in einem schwefelsauren Hartchrombad mit mehreren Stromunterbrechungen erfolgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4142952A DE4142952C1 (de) | 1991-12-24 | 1991-12-24 | |
DE4142952 | 1991-12-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0548469A1 EP0548469A1 (de) | 1993-06-30 |
EP0548469B1 EP0548469B1 (de) | 1995-09-06 |
EP0548469B2 true EP0548469B2 (de) | 1999-08-18 |
Family
ID=6448120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920116006 Expired - Lifetime EP0548469B2 (de) | 1991-12-24 | 1992-09-18 | Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0548469B2 (de) |
DE (1) | DE4142952C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111321452A (zh) * | 2018-12-17 | 2020-06-23 | 联合汽车电子有限公司 | 深内孔零件挂镀结构 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009057466A1 (de) * | 2009-12-03 | 2011-06-09 | Hübel, Egon, Dipl.-Ing. (FH) | Vorrichtung und Verfahren zum elektrischen Kontaktieren von Behandlungsgut in Galvanisieranlagen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3451903A (en) * | 1965-04-09 | 1969-06-24 | Mitsubishi Heavy Ind Ltd | Conductor roll and method of making the same |
FR2315550A1 (fr) * | 1975-06-26 | 1977-01-21 | Nobel Bozel Traitements Surfac | Rouleau conducteur monobloc pour traitements electrolytiques de materiaux en bande |
JPS6289895A (ja) * | 1985-10-15 | 1987-04-24 | Nippon Kokan Kk <Nkk> | 表面処理用通電ロ−ル |
-
1991
- 1991-12-24 DE DE4142952A patent/DE4142952C1/de not_active Expired - Fee Related
-
1992
- 1992-09-18 EP EP19920116006 patent/EP0548469B2/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111321452A (zh) * | 2018-12-17 | 2020-06-23 | 联合汽车电子有限公司 | 深内孔零件挂镀结构 |
CN111321452B (zh) * | 2018-12-17 | 2021-06-08 | 联合汽车电子有限公司 | 深内孔零件挂镀结构 |
Also Published As
Publication number | Publication date |
---|---|
DE4142952C1 (de) | 1993-04-08 |
EP0548469B1 (de) | 1995-09-06 |
EP0548469A1 (de) | 1993-06-30 |
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