Flowing gilded copper?

[10mm Witness]

Can gilded copper be flowed under pressure like lead does? Taking into consideration the tremendous pressure it would need.

[Red River Rick]

Yes............impact extrusion.

RRR

[bangerjim]

What do you mean by gilded copper?

Gilding is a term used to describe the process of gold leaf or gold powder being applied to a surface, be it wood or metal, as I use in antique restoration and reproduction.

Gold can be applied to copper by several methods:

Gold foil glued on with various adhesives such as rabbit skin glue or guiding oil

Gold can be applied with powder glued and then burnished on

Gold can be electroplated on

Gold can be sputtered on in a vacuum furnace with plasma

Why would you use gilded copper in jacket making?

Gold is softer than copper. Copper is one of the elemental metals added to 24k gold to make it harder and more wear resistant (10k/14k/etc)

[BT Sniper]

Gilding metal is a copper alloy, a brass, comprising 95% copper and 5% zinc. Gilding metal is used for various purposes, including the jackets of bullets, driving bands on some artillery shells, as well as enameled badges and other jewelry. (according to Wikipedia)

Also commonly referred to as copper jackets.

We knew what the OP meant .... I think

Flow.... yes! Same as when the brass case "flows" into the ejector hole in an overpressure load I imagine.

Swage on!

BT

[R.Ph. 380]

[I][B]Same as when the brass case "flows" into the ejector hole in an overpressure load I imagine.BT

That would be a BAD thing..................................

[10mm Witness]

Brian...yes you are correct. An idea I have may require a part of the jacket to flow into a shape and area.

[DukeInFlorida]

I used to sell custom (customer designed) impact extrusions for a company (who turned the designs into working actual parts) in the Chicago area.

The pressures required for aluminum were amazing! I wouldn't even want to begin to deal with impact extrusion of a copper or brass alloy. Even the relative small amount of zinc makes the metal very hard.

Most items that would otherwise benefit from tyhe impact extrusion process might be better made from a metal stamping process, using thin sheet stock as raw material. However, most brass cases for cartridges are made using the impact extrusion process. I believe the "blank forms" are heated before pushing the punch into them.

Impact Extrusion: http://thelibraryofmanufacturing.com...extrusion.html