Design of Experiment of High Pressure Steel Tank Using Tandem Submerged Arc Welding

Abstract:

The objective of this research is to investigate the appropriated Tandem Submerged Arc Welding (TSAW) by Punch through technique for high pressure steel tank in ship building industry. Electrode Type AWS A5.17 EM12K and powder flux type AWS A5.17 F7A6 have been applied with electric current at AC+ 550-700 Amp/DC 460-610 Amp. The welding travel speed is controlled between 515-590 mm/min with arc length between 25-30 mm which SM400 steel type is 25 mm thickness. The welding is in horizontal position without any bevel on the steel piece. Studying the suitable parameters from the experiment type 2⁴ of this procedure experiment, the result has been found that the most suitable parameter set up for this welding is DC460, AC550, ST515, AL25. The experiment follows AWS D1.1 standard with 100% full penetration, tensile value at 542.61 N/mm². Welding line supports impact test at 0°C with average value of 66 Joules, average hardness value at 156.4 HV, bending at 180°. With out any defected found. Moreover, this method can be reduced welding cost around18,482 baht/day and also increased the welding lenght around 168%.

• Periodical: Applied Mechanics and Materials (Volume 848)
• Pages: 11-14
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.848.11
• Online since: July 2016
• Authors: Prin Boonkanit*, Wittaya Pansong
• Keywords: Cost, DOE, Hardness, Tandem Submerge Arc Welding, Tensile

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