Comparison of Thermal Efficiency between A-TIG and Conventional TIG Welding

被引：2
|
作者：
Donega, Thiago Jose [1 ]
Costa, Thonson Ferreira [1 ]
Arencibia, Rosenda Valdes [1 ]
Vilarinho, Louriel Oliveira [1 ]
机构：
[1] Univ Fed Uberlandia, BR-38400 Uberlandia, MG, Brazil
来源：
SOLDAGEM & INSPECAO | 2014年 / 19卷 / 01期
关键词：
Active Flux; Calorimetry; Measurement Uncertainty; FLUXES; HEAT;
D O I：
10.1590/S0104-92242014000100005
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The A-TIG process (TIG welding with active flux) consists in depositing a thin layer of flux on the workpiece surface just before the welding. The layer deposition can be done by brushing or spraying over the surface, and welding is performed after it dries out. It is found that with this process it is possible to increase productivity (travel speed) up to three times higher compared to the conventional TIG process. However, the physical phenomena associated with this practical gain of productivity still remains under discussion. Thus, the aim of this paper is to analyze the thermal efficiency and heat input in the welding process with the A-TIG compared with conventional TIG process by using liquid-nitrogen calorimeter, as a contribution to better understanding the physical associated phenomena. From the presented results, it is observed that the effects of A-TIG welding on the weld bead geometry are in agreement with previous work. In addition, it is possible to conclude that the thermal efficiency of the A-TIG welding is lower than the efficiency in conventional TIG welding. Thus, it is possible to conclude that the arc constriction is more important than the reduction of thermal efficiency.
引用
收藏
页码：28 / 41
页数：14
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