Lead coating metal tube and wire - by passing the tube through a lead press contg. an extrusion die

A lead jacket is put onto metal shapes which are harder than Pb, esp. tubes and wires. The metal-coated shape is wetted with a flux which leaves no residue on evapn. and then heated to 120-240 degrees C after which the Pb jacket is pressed round the profile at 180-280 degrees C (pref. 200-240 degree...

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Bibliographic Details
Main Author REINERT,MAX
Format Patent
LanguageEnglish
German
Published 24.04.1975
Subjects
AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
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Summary:A lead jacket is put onto metal shapes which are harder than Pb, esp. tubes and wires. The metal-coated shape is wetted with a flux which leaves no residue on evapn. and then heated to 120-240 degrees C after which the Pb jacket is pressed round the profile at 180-280 degrees C (pref. 200-240 degrees C). The metal substrate is pref. heated in a protective atmos. in which it remains until being coated with Pb, and the substrate can be pre-coated with Sn or Pb prior to being given a Pb-jacket. The pref. equipment for the process consists of a press with an extrusion die for the Pb and a pre-heating chamber for the tube or wire using inert gas, plus a flux bath and felt disc for applying the flux. Provides a corrosion-resistant Pb coating suitable e.g. in atmos. contg. H2SO4, with a metallic bond being formed between the Pb and the metal substrate.
Bibliography:Application Number: DE19732346089