Method for joining a jacket element and a core element together
View Patent ↗A method for joining a highly electroconductive core element ( 2 ) to a jacket element ( 1 ) made of refined steel. In said method, the electroconductive core element ( 2 ), such as a copper bar, and the joining agent element ( 3 ) are inserted in the jacket element ( 1 ), and at least the juncture area of the elements to be joined is thermally treated, so that there is created a metallurgical joint between the electroconductive core element ( 2 ) and the refined-steel jacket element ( 1 ).
1. A method for joining a highly electroconductive core element that mainly consists of copper to a jacket element made of refined steel, the method comprising inserting the electroconductive core element and a joining element that mainly consists of tin into the jacket element, and thermally treating at least a juncture area of the elements to be joined at a temperature sufficient to create a metallurgical joint mainly from tin bronze between the electroconductive core element and the refined-steel jacket element.
2. The method according to claim 1 , wherein the copper core element consists of at least 50% copper.
3. A method according to claim 1 , wherein the joining element mainly consists of tin.
4. A method according to claim 1 wherein the jacket element is a tube element, and at least one end thereof being at least partly closed, at least during thermal treatment.
5. A method according to claim 1 , wherein the core and jacket elements to be joined together are maintained in an essentially horizontal position during the thermal treatment.
6. A method according to claim 1 , wherein prior to thermal treatment, the elements to be joined together are in a substantially horizontal position, and the joining element is applied to the surface of the core prior to placement into the jacket element.
7. A method according to claim 1 , wherein, during the thermal treatment, the core and jacket elements are maintained in a substantially non-horizontal position.
8. A method according to claim 1 , wherein a suspension bar is manufactured for use with an electrode.
9. A method according to claim 1 wherein the electroconductive core element is a copper bar.
10. A method according to claim 8 wherein an electrode is a permanent cathode.
11. The method according to claim 1 , wherein during the thermal treatment, molten tin from the joining element dissolves copper from the copper bar to create the tin bronze metallurgical joint.
12. The method according to claim 1 , wherein the refined steel is stainless steel or acid-resistant steel.
13. A method for joining a highly electroconductive core element to a jacket element made of refined steel, the method comprising:
inserting the electroconductive core element consisting mainly of copper, and a joining agent element consisting mainly of tin, into the jacket element;
thermally treating in a furnace at a temperature over about 900° C., at least a juncture area of the elements to be joined to create a metallurgical joint, mainly from tin bronze, between the electroconductive core element and the refined-steel jacket element.