Application of 23 factorial design experiments for gas tungsten arc welding parameters on ASTM A36 steel welds
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Publication Details
Author list: Peasura P.
Publisher: Trans Tech Publications
Publication year: 2013
Volume number: 246-247
Start page: 707
End page: 711
Number of pages: 5
ISBN: 9783037855409
ISSN: 1660-9336
eISSN: 1662-7482
Languages: English-Great Britain (EN-GB)
Abstract
ASTM A36 carbon steel is the most commonly available of the hot-rolled steels. This specification covers carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes. The research was to study the in effected of gas tungsten arc welding parameters which effects the hardness and physical characteristics of welding for carbon steel ASTM A36. The specimen was carbon steel sheet metal 6 mm thick. The 23 factors experiment was used polarity direct current electrode negative (DCEN) and alternating current (AC), welding current at 90 and100 amperes with tungsten electrode angles at 30 and 60degree. The weld sample was test by hardness and penetration. The result showed that polarity, welding current and tungsten electrode angle had on interaction on hardness and penetration at 95% confidence (p-value < 0.05).The factors made maximum hardness was polarity AC, welding current 100 amp. and tungsten angle 60ฐ of 803.16 HV. The factors made maximum penetration was polarity DCEN, welding current 100 amp. and tungsten angle 60ฐ of 2.71mm. The research data can be used to determine the appropriate gas tungsten arc welding process of carbon steel weld. ฉ (2013) Trans Tech Publications, Switzerland.
Keywords
23 factorial designs, penetration
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