Process for manufacturing welding wire

Details Process for manufacturing welding wire Process for manufacturing welding wire

1997-02-11

1998-10-13

Shaw, Clifford C.

Electric heating

Metal heating

Endless strip

148526, 21914522, B23K 924

Patent

active

058215000

ABSTRACT:
A process for manufacturing seamless flux-cored welding wires 0.8 to 4 mm in diameter with excellent cracking resistance and primer proof quality and containing very little diffusible hydrogen suited for the welding of high-tensile steels and steel structures subjected to large restraining forces by dehydrogenating by high-temperature heating comprises the steps of heating a straight wire 8 to 15 mm in diameter by direct electric heating through a first and a second pair of roll electrodes spaced 2 to 5 m apart and a ring transformer disposed therebetween to a temperature between 620.degree. and 1100.degree. C., cooling the heated wire to a temperature not higher than 500.degree. C. with a coefficient of heat transfer not higher than 250 kcal/m.sup.2 h.degree.C., and drawing to the desired diameter. The welding wire thus obtained a weld containing not more than 5 ml of diffusible hydrogen per 100 g deposited metal.

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patent: 4987281 (1991-01-01), Yao
patent: 5008514 (1991-04-01), Kyriakis
Patent Abstracts of Japan, vol. 016, No. 299 (M-1274), 2 Jul. 1992 & JP 04 081297 A (Kawasaki Steel Corp), 13 Mar. 1992 * abstract *.
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Patent Abstracts of Japan, vol. 005, No. 158 (M-091), 12 Oct. 1981 & JP 56 086699 A (Nippon Steel Corp), 14 Jul. 1981 * abstract *.
Chemical Abstracts+Indexes, vol. 110, No. 10, 6 Mar. 1989, p. 312 XP000017233 Suzuki Tomoyuki et al: "Manufacture of Flux-filled Wires for Arc Welding" & JP 63 203 297 A (Nippon Steel) 23 Aug. 1988, abstract 110:80422s.

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