Development of Activated Flux, Optimization of Welding Parameters and Characterization of Weld Joint for DMR-249A Shipbuilding Steel

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• 作者：Rishi Pamnani ; M. Vasudevan ; T. Jayakumar…
• 关键词：DMR ; 249A ; HSLA ; A ; TIG ; Mechanical properties
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：70
• 期：1
• 页码：49-57
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials; Materials Science, general; Tribology, Corrosion and Coatings;
• 出版者：Springer India
• ISSN：0975-1645
• 卷排序：70

文摘

The present investigation aims to develop activated flux for joining of DMR-249A steel using activated tungsten inert gas (A-TIG) welding process and characterize the fabricated weld joint. The various combinations of fluxes were prepared to decide suitable flux for DMR-249A steel. The design of experiment was carried out for optimization of welding parameters to achieve the desired depth of penetration. The square butt weld joints were fabricated on 10 mm thick plates employing A-TIG welding using developed flux and optimized process parameters employing double side welding procedure. The microstructural investigations and hardness, tensile and impact tests were carried out on the base metal and weld joint. The strengths, ductility and impact toughness of the joints were found to be comparable with that of the base metal.