DE1483697C - Process for the production of corrosion-resistant, dense mckelhaltiger coatings on steel strip - Google Patents
Process for the production of corrosion-resistant, dense mckelhaltiger coatings on steel stripInfo
- Publication number
- DE1483697C DE1483697C DE1483697C DE 1483697 C DE1483697 C DE 1483697C DE 1483697 C DE1483697 C DE 1483697C
- Authority
- DE
- Germany
- Prior art keywords
- steel strip
- resistant
- corrosion
- dense
- coating
- 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
Links
- 238000000576 coating method Methods 0.000 title claims description 14
- 229910000831 Steel Inorganic materials 0.000 title claims description 11
- 239000010959 steel Substances 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 8
- 238000005260 corrosion Methods 0.000 title claims description 4
- 230000007797 corrosion Effects 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000011248 coating agent Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
- 229910003452 thorium oxide Inorganic materials 0.000 description 1
Description
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In dem Hauptpatent 1 458 275 wurde ein Verfahren zum Herstellen korrosionsbeständiger Überzüge auf Stahlband beschrieben, welches darin besteht, eine Schicht einer Nickelpulver enthaltenden wasserhaltigen Paste auf das Stahlband aufzutragen, die as Schicht zu trocknen, zu sintern und den sich dabei ergebenden festen Überzug zu verdichten. Unter den bevorzugten Verfahren dieser Erfindung ist eines erwähnt, bei dem das Stahlband während des Auftragens der Paste oder nach dem Auftragen in noch feuchtem Zustand in Vibration versetzt wird, während ein anderes bevorzugtes Verfahren des Hauptpatents darin besteht, passive, elektrisch nichtleitende Partikeln als feindisperse Phase in den Überzug einzubringen und anschließend einen Chromüberzug auf dem ersten Überzug elektrolytisch abzuscheiden. Thoriumoxid oder Tonerde sind hierfür verwendbare passive Partikeln, die in einer Körnung von 0,01 bis 50 μπι Verwendung; finden?In the main patent 1 458 275 a method for the production of corrosion-resistant coatings described on steel tape, which consists in applying a layer of a hydrous nickel powder containing Apply paste on the steel belt, the as Layer to dry, to sinter and to compact the resulting solid coating. Under the preferred method of this invention is mentioned one in which the steel strip during application the paste or after application while it is still wet, while Another preferred method of the main patent is passive, electrically non-conductive Introduce particles as a finely dispersed phase in the coating and then apply a chrome coating the first coating to be deposited electrolytically. Thorium oxide or alumina can be used for this passive particles in a grain size of 0.01 to 50 μπι use; Find?
Falls erforderlich, kann das Stahlband vor dem Auftragen der Paste mit einer Kupferschicht überzogen werden, bzw. kann die Paste bis zu 10 Gewichtsprozent des Gesamtgehaltes Kupfer enthalten.If necessary, the steel strip can be coated with a copper layer before the paste is applied or the paste can contain up to 10 percent by weight of the total copper content.
Vorzugsweise wird das überzogene Stahlband nach dem abschließenden Walzen 60 bis 2 Minuten lang bei einer Temperatur von 500 bis 800° C geglüht.Preferably the coated steel strip is 60 to 2 minutes long after the final rolling annealed at a temperature of 500 to 800 ° C.
Nach jedem der Ausführungsbeispiele des Hauptpatents wird der festhaftende Überzug kaltgewalzt und anschließend geglüht. Die Erfindung besteht nun darin, einen korrosionsbeständigen Überzug mit sehr geringer Porosität und guter Oberfläche dadurch zu erzeugen, daß die Verdichtung durch Warmwalzen erfolgt. Die hierfür geeignete Temperatur liegt bei 425 bis 10400C; die der Verdichtung des Überzuges dienenden Walzen können beispielsweise in der Kühlzone des Sinterofens angeordnet sein, um das mit dem Überzug versehene Stahlband während des Austritts aus dem Ofen zu verdichten. Auf diese Weise gelingt es, den Überzug bis etwa 90% oder auch 95 %> der theoretisch möglichen Dichte zu verdichten. Ein nach dem Verfahren der Erfindung hochverdichtetes Stahlband ist einem lediglich durch Kaltwalzen verdichteten Stahlband weit überlegen.According to each of the exemplary embodiments of the main patent, the firmly adhering coating is cold-rolled and then annealed. The invention now consists in producing a corrosion-resistant coating with very low porosity and a good surface in that the compaction is carried out by hot rolling. The temperature suitable for this is from 425 to 1040 0 C; the rollers used to compress the coating can be arranged, for example, in the cooling zone of the sintering furnace in order to compress the steel strip provided with the coating as it exits the furnace. In this way it is possible to compress the coating to about 90% or even 95%> the theoretically possible density. A steel belt that is highly compressed according to the method of the invention is far superior to a steel belt that is compressed merely by cold rolling.
Im übrigen wird das Verfahren durch die Beschreibung des Hauptpatents näher erläutert.In addition, the process is explained in more detail by the description of the main patent.
Claims (2)
Family
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