Generation of atmospheric arc plasma with some chemical activity is performed a transferred type dc discharge. A commercially available welding torch used argon steam mixture as operation gas. As mol percentage increases in the mixture, input power to and generated appearance clearly changes. Spectroscopy analysis shows that complete dissociation additional leads increment H O radicals plasma.

The welding use correct process parameters will produce joint with optimum in mechanical properties. current is a very important parameter welding. Gas Tungsten Arc Welding carbon steel A53 Gr B uses variations can be an option to get the best quality joints. purpose of this research properties and microstructure by varying current. experimental method GTAW A 53 using single V butt 5G position,...

Fatigue characteristics of welded joints alloy 01420C made by resistance spot welding and automatic argon arc are obtained. The highest durability was shown with a longitudinal weld. Joints Produced simulating the edge line reinforced element have comparable to an unloaded weld spot, which in turn is inferior joint elements limited cross-section repair mechanical cut similar standard sample for...

Gas tungsten arc welding (GTAW) uses argon gas as a protective in the process. Argon cylinders weigh 100 kg, making it difficult to mobilize large quantities when work is at certain height. Therefore necessary create storage area that able accommodate and withstand load of their contents can be mobilized In order get suitable area, design has been carried out, which includes calculating strengt...

Abstract The laser welding experiment of Nb521 niobium-tungsten alloy with 1.0mm thickness was carried out, and the effects different edge preparation states, including fast wire cutting + milling slow no milling, on weld formation were analyzed. results show that weldability is very good. parameters are in a wide range, good can be obtained easily. effect states small, all welded joints broken...

In the present work a three-dimensional model has been developed to study shielding gas flow and heat transfer in a laser welding process using computational fluid dynamics. This investigation was motivated by problems met while using an optical system to track the weld path. The aim of this study was to investigate if the shielding gas flow could disturb the observation area of the optical sys...