SURFACE TENSION EFFECTS IN THE FLUX CORED ARC WELDING OF HY80 STEELS

Authors
  1. Leewis, K.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Technical Univ of Nova Scotia, Halifax NS (CAN)
Abstract
Efficient deposition of weld metal requires a complicated gas-metal-slag interaction to maintain the correct chemistry, during solidification. The slag-metal quasi-equilibrium determines the mechanical performance and the bead profile of the solidifying weld pool. The fluxes in the consumables for joining the HY series of plate were found to be rutile based with melting points exceeding 1600C, while the slag from the welds all fused below 1450C. The extremely aggressive nature of these commercial slags made surface tension and viscosity measurements difficult. A model slag system showed that the precipitation of titania compounds caused a tenfold increase in viscosity during cooling.
Report Number
DREA-CR-87-462 — Contractor Report
Date of publication
15 Dec 1987
Number of Pages
72
DSTKIM No
88-01436
CANDIS No
54670
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy

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