Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Minoru Kobayashi

Tetsuo Suga

Shoji Minato

Tomokazu Godai

Yoshiya Sakai

Makoto Yamaga

Hiroshi Saita

Yoshizo Hashimoto

Katsumi Arai

Tsuguo Ooe

Shinji Kimura

Shingo Maki

A flux-cored wire electrode suitable for use in gas-shielded arc-welding, characterized in that the sum of the carbon content in the sheath made of soft steel and the carbon content in a lubricant adhered on the sheath is 0.045 wt. % or lower relative to the total weight of the sheath and a flux, which contains 20-50 wt. % of TiO.sub.2, 1-15 wt. % of SiO.sub.2, 2.5-10 wt. % of ZrO.sub.2, 0.1-5 wt. % of an arc-stabilizing agent, 10-45 wt. % of a deoxidizer and up to 50 wt. % of iron powder, all based on the total weight of the flux, is filled to an amount of 10-30 wt. % of the total weight of the wire electrode in the cavity surrounded by the sheath. The above flux-cored wire electrode features a low fume emission rate comparable with that of a solid wire electrode.

Flux-cored wire electrode suitable for use in gas-shielded arc-welding

The present invention relates to a coated welding electrode containing at least 0.5% of Cr based on the total weight of the welding electrode and comprising a metal core and a coating flux composition. In this welding electrode, the content of Na and K components in the coating flux calculated as (Na.sub.2 O + K.sub.2 O) is reduced below 1% based on the total weight of the coating flux composition, whereby amounts of fumes generated at the welding step, especially the amount of toxic soluble Cr, are suppressed and minimized.

Coated welding electrode containing chromium

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Fujisawa, Japan

Minoru Kobayashi