Effects of flux modifications on high strength steel weld metal
The performance of high strength steel welds is sensitive to the weld metal chemistry, and that, in turn, is dependent on the composition of the welding consumables. In the case of submerged arc welding, the flux plays an important role in determining the chemistry of the resulting weld metal. The u.S. Navy is conducting a program to gain a basic understanding of fluxes used for welding high strength steels in an effort to be able to better select the appropriate flux, or design a new flux, for a given application. The objective of the present work is to analyze the effects of a systematic chance in flux composition on weld metal chemistry and properties The dry mix of a commercial flux was modified with additions of MnO to produce a series of four experimental flux mixes with target MnO levels from 1 wt% to 4 wt%. A fifth experimental flux mix was produced with an addition of 1/2 wt% CeO{sub 2} to examine the effect of rare earth additions to the flux. Tensile and impact properties and weld metal chemistry were tested for each weldment, and correlations were made with flux composition. Weld metal Mn levels from 1.37 wt% (0.76 wt% flux MnO) to 1.75 wt% (4.26 wt% flux MnO) were achieved with the MnO-added fluxes.The small CeO{sub 2} addition appeared to improve weld metal impact performance it was concluded that a more basic knowledge of welding fluxes can be used in selecting or designing appropriate fluxes for Navy applications. Further work is required to characterize the specific effects of other flux constituents and their interactions on weld metal performance.
- OSTI ID:
- 115474
- Report Number(s):
- CONF-9404233-; TRN: 95:002927-0052
- Resource Relation:
- Conference: 75. American Welding Society (AWS) annual meeting, Philadelphia, PA (United States), 10-15 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of 75th Diamond anniversary American Welding Society annual meeting; PB: 273 p.
- Country of Publication:
- United States
- Language:
- English
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