Method for the manufacture of multilayered contacts for medium-voltage vacuum power circuit breakers
AssigneeSiemens Aktiengesellschaft
InventorsHeinrich Hassler, Horst Kippenberg
Life of this patent
Estimating the term…
Abstract
A method for producing multilayered contacts for medium-voltage vacuum power circuit breakers is provided comprising impregnating under vacuum with oxygen-free, liquid copper, a composite body of metal powders consisting of at least 35% by volume of a metal selected from the group consisting of chromium and vanadium and at least one metal selected from the group consisting of chromium, vanadium, cobalt, nickel and iron, in a crucible comprised of a metal selected from the group consisting of iron, steel, and chromium-nickel steel; and removing at least part of the crucible to expose a contact surface.
Claims11
A method for preparing pore-free, multilayered contacts for medium-voltage vacuum power circuit breakers which comprises:
- a. impregnating under vacuum with oxygen-free, liquid copper a composite body of metal powders consisting of at least 35% by volume of a metal selected from the group consisting of chromium and vanadium and at least one metal selected from the group consisting of chromium, vanadium, cobalt, nickel and iron, in a crucible comprised of a metal selected from the group consisting of iron, steel and chromium-nickel steel;
- and
- b. removing at least part of the crucible to expose a contact surface.
A method for preparing pore-free, multilayered contacts for medium voltage vacuum power circuit breakers which comprises:
- a. forming a composite body of sintered or pressed metal powders, consisting of at least 35% by volume of an element selected from the group consisting of chromium and vanadium and at least one element selected from the group consisting of chromium, vanadium, cobalt, nickel and iron;
- b. heating the composite body under vacuum with oxygen-free copper in a crucible made from deep-drawn sheet metal said metal selected from the group consisting of iron, steel and chromium-nickel steel to a temperature above the melting point of copper until said composite body is impregnated with said copper;
- and
- c. removing the walls of the crucible.
Dependencies are inferred from the claim text.