Abstract
In this study, the effect of TIG welding parameters like pulse rate, pulse frequency, arc travel speed and wire feed rate on the properties of girth welding of SS 304L were experimentally examined. ER 308L filler wire was used for reinforcement of weld. The pipes were welded by using orbital welding machine. Samples were made by varying above mentioned parameters. Tensile, bend and hardness tests were performed to examine mechanical properties. It was examined that the sample welded at 90A pulse current was sounder having tensile strength of 605 MPa and hardness of base 160HB, HAZ 114HB, weld99 HB.
Highlights
Austenitic stainless steel is most widely used group of steels in the fabrication of industrial equipment because of its suitable properties of formability and weldability
The TIG welding parameters that affect the quality of weld joint i.e. pulse current, frequency of pulse current, Arc travel speed, and wire feed rate were selected for welding samples
Tensile test was performed on all samples
Summary
Austenitic stainless steel is most widely used group of steels in the fabrication of industrial equipment because of its suitable properties of formability and weldability. It was found that penetration depth decreased with the increase of bevel height of single V butt joint e-ISSN: 2321-6212 p-ISSN: 2347-2278 and at lower welding speed tensile strength was high. The TIG welding parameters that affect the quality of weld joint i.e. pulse current, frequency of pulse current, Arc travel speed, and wire feed rate were selected for welding samples. The results of tensile test were compared and the effect of different parameters on the strength and ductility was examined.
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