Flux cored wires for gas shielded arc welding
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United States of America Patent
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May 11, 1999
Grant Date -
N/A
app pub date -
Jul 30, 1997
filing date -
Mar 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A flux cored wire for gas shielded arc welding with a mixed gas comprising argon and carbon dioxide which comprises: a seam-welded steel sheath; and a core filled in the steel sheath and comprising, all in weight percent: a slag and arc stabilizer comprising 4.0 to 6.0% TiO.sub.2, 0.2 to 0.8% SiO.sub.2, 0.4 to 0.8% ZrO.sub.2, 0.2 to 0.8% Al.sub.2 O.sub.3, 0.06 to 0.25% Na.sub.2 O+K.sub.2 O, and 0.1 to 0.4% metal fluoride; an alloying agent and metal deoxidizer comprising 0.03 to 0.06% C, 0.20 to 0.80% Si, 1.50 to 2.20% Mn, and 0.30 to 0.60% Mg; and not less than 2% Fe; in which the difference between the percentages of iron or a combination of Na and K segregated in any two quartered cross section of the wire that are defined by equations (1) and (2) in the specification are not more than 10% and not more than 0.15%, respectively.
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