Effect of Manual and Automatic Activated Tungsten Inert Gas Welding Using Single Component Fluxes on Stainless Steel AISI-304

IF 0.5 4区工程技术 Q4 ENGINEERING, MARINE Journal of Ship Production and Design Pub Date : 2020-02-01 DOI:10.5957/JSPD.11180041

Shaji Krishna Prasad, A. Mathiazhagan, Pallichakkalayil Sasidharan Krishnadas

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引用次数: 3

Abstract

The study compared the effects of manual activated tungsten inert gas (A-TIG) welding and automated A-TIG welding on AISI (American Iron and Steel Institute)- 304 at three different values of current using commercially available powders of Al2O3, SiO2, Fe2O3, MgCl2, and TiO2 separately as activated flux and distilled water as carrier solvent. The effect of fluxes on the depth of penetration of the weldments, width of weldment, microstructure of the weldment, and microhardness of the weldment was investigated. Reverse Marangoni convection and arc constriction are found to be more effective in A-TIG manual welding, as aspect ratio obtained by A-TIG manual welding is greater as than that of automatic A-TIG welding. Microstructure of both the manual and automatic A-TIG-welded specimen is similar with no noticeable differences and almost same amount of intermetallic phases and carbon precipitates. Microhardness tests revealed that for Al2O3 and TiO2 fluxes, manual A-TIG-welded specimen have lower values of microhardness at weldment, heat-affected zone, and base metal than automated A-TIG-welded specimen. The aim of the study is to implement the manual A-TIG process in shipbuilding industry to improve the productivity of welding as automated A-TIG welding in the industry has limitations.

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用单组分焊剂手动和自动激活钨惰性气体焊接AISI-304不锈钢的效果

采用市售Al2O3、SiO2、Fe2O3、MgCl2和TiO2粉末分别作为活化助焊剂，蒸馏水作为载体溶剂，比较了在三种不同电流值下，手工活化钨惰性气体(A-TIG)焊接和自动A-TIG焊接对AISI (American Iron and Steel Institute)- 304的焊接效果。研究了焊剂对焊件渗深、焊件宽度、焊件显微组织和焊件显微硬度的影响。反向Marangoni对流和电弧收缩在A-TIG手工焊接中更为有效，因为A-TIG手工焊接获得的长径比大于A-TIG自动焊接。手工焊和自动焊试样的显微组织相似，无明显差异，金属间相和碳析出量几乎相同。显微硬度测试结果表明，对于Al2O3和TiO2助焊剂，手工a - tig焊接试样在焊件、热影响区和母材处的显微硬度值均低于自动a - tig焊接试样。研究的目的是在船舶工业中实施人工A-TIG工艺，以提高焊接的生产率，因为自动化A-TIG焊接在行业中存在局限性。

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来源期刊

Journal of Ship Production and Design ENGINEERING, MARINE-

CiteScore

1.10

自引率

0.00%

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期刊介绍： Original and timely technical papers addressing problems of shipyard techniques and production of merchant and naval ships appear in this quarterly publication. Since its inception, the Journal of Ship Production and Design (formerly the Journal of Ship Production) has been a forum for peer-reviewed, professionally edited papers from academic and industry sources. As such it has influenced the worldwide development of ship production engineering as a fully qualified professional discipline. The expanded scope seeks papers in additional areas, specifically ship design, including design for production, plus other marine technology topics, such as ship operations, shipping economics, and safety. Each issue contains a well-rounded selection of technical papers relevant to marine professionals.