Fundamentals of the chemical behavior of select welding fluxes
- Univ. of Illinois, Chicago, IL (United States)
- Argonne National Lab., IL (United States)
This investigation evaluates the relative effects of thermochemical and electrochemical reactions on the transport of elements, particularly manganese, from the flux to the weld metal in submerged arc welding. The experimental fluxes used were silica-calcium oxide-based, containing 20 wt-% MnO, 15 wt-% CaF[sub 2], and SiO[sub 2] to CaO ratios that varies from 5.50 to 1.16. The slags formed show good detachability, and the welds produced have good bead morphology. The dilution effect was eliminated by drawing the welding wire from the same materials as the base plate. The welding parameters were held constant during weld production and two polarities were used. The arc was found to be stable, but was more so for electrode-positive (reverse) polarity welds. The results of chemical analyses of fluxes, slags and welds are consistent with the following three mechanisms working in parallel that all affect the compositions (and the apparent compositions) of weld metal: (1) the pyrochemical reactions between the slag and the metal; (2) electrochemical reactions at the anodes and cathodes (oxidation and reduction, respectively); and (3) occlusion of slag or solid products of reactions in the weld pool. 22 refs., 6 figs., 1 tab.
- OSTI ID:
- 5154698
- Journal Information:
- Welding Research Supplement; (United States), Vol. 70:1; ISSN 0096-7629
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
MANGANESE
MASS TRANSFER
WELDING FLUXES
ELECTROCHEMISTRY
THERMOCHEMICAL PROCESSES
PYROMETALLURGY
SLAGS
SUBMERGED ARC WELDING
WELDED JOINTS
ARC WELDING
CHEMISTRY
ELEMENTS
EXTRACTIVE METALLURGY
FABRICATION
JOINING
JOINTS
METALLURGY
METALS
TRANSITION ELEMENTS
WELDING
400201* - Chemical & Physicochemical Properties
360101 - Metals & Alloys- Preparation & Fabrication
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry