Both-side single layer, high speed submerged arc welding process

Details Both-side single layer, high speed submerged arc welding process Both-side single layer, high speed submerged arc welding process

1981-03-04

1982-12-14

Kucia, R. R.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219 732, 219 7321, 21914624, B23K 918

Patent

active

043639518

ABSTRACT:
A process for both-side single layer, high speed submerged arc welding of steel plate for use in low-temperature applications having a particular chemical composition with a welding flux and welding wire is disclosed. The welding flux comprises 20 to 30 wt % of SiO.sub.2, less than 25 wt % of at least one of TiO.sub.2 and ZrO.sub.2, 10 to 20 wt % of CaO, less than 10 wt % of at least one of MnO and MgO, not more than 10 wt % of Al.sub.2 O.sub.3 and 20 to 40 wt % in total of CaF.sub.2 and BaO each being not more than 20 wt %, wherein a total content of acidic components (SiO.sub.2 %+TiO.sub.2 %+ZrO.sub.2 %) is 30 to 45 wt %, a total content of basic components (CaO %+MgO %+MnO %) is 20 to 30 wt % and a weight ratio of the total content of basic components to the total content of acidic components is within a range of 0.5 to 0.8; said these components being compounded so that a surface tension F of slag is not more than 450 dyne/cm as calculated from the following equation (1):

REFERENCES:
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patent: 4020312 (1977-04-01), Araki et al.
patent: 4131781 (1978-12-01), Ito et al.
patent: 4131781 (1978-12-01), Ito et al.
patent: 4196335 (1980-04-01), Ikeda et al.
patent: 4256949 (1981-03-01), Baumann et al.
G. G. Wittstock, Selecting Submerged Arc Fluxes for Carbon and Low Alloy Steels, WELDING JOURNAL, Sep. 1976, pp. 733 to 741.

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