DE634959C - Pickling process for transformer and dynamo sheets - Google Patents

Pickling process for transformer and dynamo sheets

Info

Publication number
DE634959C
DE634959C DEM131001D DEM0131001D DE634959C DE 634959 C DE634959 C DE 634959C DE M131001 D DEM131001 D DE M131001D DE M0131001 D DEM0131001 D DE M0131001D DE 634959 C DE634959 C DE 634959C
Authority
DE
Germany
Prior art keywords
transformer
pickling process
pickling
dynamo sheets
sheets
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
Application number
DEM131001D
Other languages
German (de)
Inventor
Dr W Schneider
Dr G Naeser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to DEM131001D priority Critical patent/DE634959C/en
Application granted granted Critical
Publication of DE634959C publication Critical patent/DE634959C/en
Expired legal-status Critical Current

Links

Landscapes

  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

Beizverfahren für Transformatoren- und Dynamobleche Für die Bewertung von Transformatoren-und Dynamoblechen ist u. a. der sogenannte Füllfaktor mit maßgebend, der ein 'Maß für die Ebenheit der Bleche und die Glätte der Oberfläche darstellt. Da die bei der Herstellung entstehende Zunderschicht den Füllfaktor herabsetzt, pflegt man die Bleche nach der Glühung zu beizen. Die bisher für die Beizung benutzten Säuren lösen die Eisenoxyde und nur ungenügend oder überhaupt nicht die sehr fest haftende Kieselsäureschicht.Pickling process for transformer and dynamo sheets For the evaluation of transformer and dynamo sheets is, inter alia. the so-called fill factor is decisive, which is a 'measure of the flatness of the sheet metal and the smoothness of the surface. Since the layer of scale produced during manufacture reduces the fill factor, the metal sheets are usually pickled after annealing. Those previously used for pickling Acids dissolve the iron oxides and only insufficiently or not at all the very solid ones adherent silica layer.

Das im folgenden beschriebene Beizverfahren gestattet eine vollständige Entfernung der Zunderschicht durch Anwendung von zwei Beizbädern. Zunächst wird die Kieselsäure durch Eintauchen in alkalische Lösungen und anschließend die Eisenoxyde, wie üblich, mit Säuren oder Lösungen von sauren Salzen entfernt. Auf diese Weise gelingt es, eine vollständig blanke, zunderfreie Oberfläche zu erhalten. Sehr zweckmäßig ist es, diese Beiz-Z> vor der letzten Walzung vorzunehmen, um zu verhindern, daß die im Laufe der Herstellung entstandene dicke Zunderschicht in das Blech eingewalzt wird. Die eingewalzten Zunderteilchen werden beim letzten Beizen herausgelöst und geben eine Oberfläche mit feinen Vertiefungen, die naturgemäß den Füllfaktor herabsetzen müssen. Durch Walzen nach dem Beizen verschwinden diese Unebenheiten.The pickling process described below allows a complete Removal of the scale layer by using two pickling baths. First will the silica by immersion in alkaline solutions and then the iron oxides, as usual, removed with acids or solutions of acidic salts. In this way it is possible to obtain a completely bright, scale-free surface. Very functional is to do this pickling Z> before the last rolling to prevent the thick layer of scale created in the course of production is rolled into the sheet metal will. The rolled-in scale particles are removed during the last pickling process and give a surface with fine indentations, which naturally reduce the fill factor have to. These unevenness disappear by rolling after pickling.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zum Beizen von Transformatoren- und Dvnamoblechen, dadurch gekennzeichnet, daß die Bleche nacheinander in einem alkalischen und sauren Bad behandelt werden. PATENT CLAIMS: i. Process for pickling transformers and Dvnamoblechen, characterized in that the sheets are successively in an alkaline and acid bath can be treated. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Entzunderung auch vor der letzten Walzung durchgeführt wird.2. The method according to claim i, characterized in that that the descaling is also carried out before the last rolling.
DEM131001D 1935-05-16 1935-05-16 Pickling process for transformer and dynamo sheets Expired DE634959C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM131001D DE634959C (en) 1935-05-16 1935-05-16 Pickling process for transformer and dynamo sheets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM131001D DE634959C (en) 1935-05-16 1935-05-16 Pickling process for transformer and dynamo sheets

Publications (1)

Publication Number Publication Date
DE634959C true DE634959C (en) 1936-09-08

Family

ID=7332144

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM131001D Expired DE634959C (en) 1935-05-16 1935-05-16 Pickling process for transformer and dynamo sheets

Country Status (1)

Country Link
DE (1) DE634959C (en)

Similar Documents

Publication Publication Date Title
DE19532278B4 (en) Method for producing a cold-rolled strip in one pass
DE634959C (en) Pickling process for transformer and dynamo sheets
DE673405C (en) Process for the pretreatment of iron and steel workpieces for non-cutting shaping, e.g. pulling, stretching and rolling
US3287237A (en) Surface treatment of bright annealed strip
JPH0114296B2 (en)
US2172041A (en) Pickling solution
US2230319A (en) Process of producing iron sheets for laminated electric transformer cores
DE543994C (en) Process for the manufacture of rectifier elements
DE416194C (en) Process for stretching, rolling and drawing metals
DE894901C (en) Process for the production of composite sheets
DE888401C (en) Process for straightening workpieces
DE685657C (en) Process for the treatment of scaled, hot-rolled transformer sheets
DE688751C (en) Process for the production of surface alloys by diffusion
US2175620A (en) Treatment of sheets, thin bars, and the like
JPH0360920B2 (en)
DE467307C (en) Process for descaling metallic objects made of stainless steel
JPS6345480B2 (en)
DE882175C (en) Process for descaling sheet metal or strips made of rustproof steels
DE677401C (en) Process for the treatment of scaled, hot-rolled sheets with 1 to 7% silicon
DE3115201C2 (en)
DE3534009C2 (en)
US1859698A (en) Method of making ductile iron-chromium alloys having alpha cold-rolled finish
DE977620C (en) Process for producing oxalate coatings on the surface of metals, especially stainless steels
DE579797C (en) Process for the production of drawn wires, in particular welding wires
AT204064B (en) Process for the production of an aluminum-containing protective coating for ingots, metal pins, blanks and billets