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Sunil, Pandey
- Recycled Slag Consumption in Submerged Arc Welding and Its Effect on Microstructure of Weld Metal
Authors
1 Department of Mechanical Engineering, SLIET, Longowal, Punjab, IN
2 Department of Mechanical Engineering, IIT Delhi, IN
Source
Indian Welding Journal, Vol 42, No 4 (2009), Pagination: 46-51Abstract
Slag generated during conventional submerged arc weld was collected and processed by replenishing it with suitable alloying elements/deoxidizers by agglomeration. This replenished slag is referred to as recycled slag. Recycled slag in combination with EL-8 filler wire was used in these investigations. The effect of welding parameters on flux (recycled slag) consumption has been investigated. Mathematical model has been developed from the data generated using two level factorial technique. The significance of coefficients and adequacy of developed model have been checked by Students âtâ test and F test respectively. The main effects of welding parameters on recycled slag consumption have been presented in graphical form for better understanding. The developed model is useful for controlling and predicting slag consumption in submerged arc welding. The physical behavior of recycled slag during welding was also observed. Microstructure of weld metal was analyzed.
Keywords
Recycled Slag, Submerged Arc Welding, Welding Parameters, Flux Consumption, Microstructure.
- Utilization of Slag as a useful Flux in submerged Arc Welding
Authors
1 Department of Mechanical Engineering, SLIET, Longowal, Punjab, IN
2 Department of Mechanical Engineering, IIT, Delhi, New Delhi, IN
Source
Indian Welding Journal, Vol 40, No 3 (2007), Pagination: 31-38Abstract
Slag generated during submerged arc welding is normally thrown away as a waste. This poses the problem of storage, disposal, environmental pollution and needs landfill space apart from exhaust of non-renewable resources. Reusing of slag will not only solve these problems but also be economical. In the present work an attempt has been made to recycle the submerged arc welding slag as a useful flux in the same submerged arc process. Fused slag was processed by replenishing it with suitable alloying elements /deoxidizers, and by agglomeration. This replenished slag is referred to as recycled slag. Recycled slag in combination with EL-8 filler wire was used for welding. The properties of weld metal deposited with recycled slag were evaluated. The mechanical properties were satisfactory and fulfill AWS (American Welding Society) requirements. The chemical composition of weld metal was within the acceptance range of AWS. The test plates cleared the radiographic test. Cost analysis indicates that it is economically viable to use the recycled slag.