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The formation of acicular ferrite in the structure of weld deposits when welding carbon
steels is often associated with the introduction of nonmetallic additives into the electrode
material. Fe.alumina composite powders with alumina particles less than 1 .m were used as a
filler for cored welding wire and the influence of aluminum oxide additives up to 2,5 wt.% on the
structure of the welded seam was studied. It was shown that the addition of aluminum oxide to
the welding wire led to the initiation of the formation of intragranular acicular ferrite in the weld
deposit and to a more even distribution of hardness through the zones of weld seam.
Keywords: acicular ferrite; alumina; welding; carbon steel. |
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