Cored wire electrode

摘要

The invention relates to a tubular cored electrode for producing a high-strength fusion-welded connection and relates to a method for producing tubular cored electrodes with a diameter of less than 2 mm. In order to avoid an oxidation and water absorption of the filler flux and to retain the original thermal reaction potentials of the mineral constituents thereof, according to the invention the tubular cored electrode is characterized in that the cold formed metal tube has in the longitudinal direction a tight fusion welded connection or a weld seam, which has a smaller weld penetration than corresponds to the tube wall thickness and in this manner a spacing of the metal bond of the tube wall towards the flux core is formed.

主权项

1. A tubular cored electrode structured for producing fusing welded connection of parts of high-strength steels with a minimum yield point (RP0.2) of the weld metal of 690 N/mm2, comprising:
a filler flux core; a metal tube with an outer coating and an outer diameter of less than 2 mm, which is cold formed to surround the filler flux core; and a metallic bond weld of the metal tube forms one of a tight fusion welded connection or a weld seam and extends in a longitudinal direction and has a weld penetration depth of less than 0.3 to 0.9 times a wall thickness of the metal tube to form a spacing between the welded connection or weld seam of the tube wall to the flux core, wherein the flux core comprises at least one of slag-forming agents and metal flux, including micro-alloying agents, and wherein the outer coating comprises a fluorocarbon polymer including polytetrafluoroethylene (PTFE) and carbon.