Control of nitrogen content and porosity in gas tungsten arc welding of high nitrogen steel

2009 ◽  
Vol 14 (1) ◽  
pp. 87-92 ◽  
Author(s):  
L. Zhao ◽  
Z. L. Tian ◽  
Y. Peng
Keyword(s):  
Nitrogen Content ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Gas Tungsten Arc ◽  
Nitrogen Steel ◽  
Gas Tungsten

Influence of Nitrogen and Heat Input on Weld Metal of Gas Tungsten Arc Welded High Nitrogen Steel

2007 ◽  
Vol 14 (5) ◽  
pp. 259-262 ◽  
Author(s):  
Lin ZHAO ◽  
Zhi-ling TIAN ◽  
Yun PENG ◽  
Yan-chang QI ◽  
Yan-jie WANG
Keyword(s):  
Weld Metal ◽  
Heat Input ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Gas Tungsten Arc ◽  
Nitrogen Steel ◽  
Gas Tungsten

scholarly journals Arc Characteristics and Weld Bead Microstructure of Ti-6Al-4V Titanium Alloy in Ultra-high Frequency Pulse Gas Tungsten Arc Welding (UHFP-GTAW) Process

2020 ◽  
Vol 26 (4) ◽  
pp. 426-431
Author(s):  
Wei LI ◽  
Gaochong LV ◽  
Qiang WANG ◽  
Songtao HUANG
Keyword(s):  
Titanium Alloy ◽  
Fusion Zone ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Weld Bead ◽  
Gas Tungsten Arc ◽  
Arc Characteristics ◽  
Arc Pressure ◽  
Gtaw Process ◽  
Gas Tungsten

To resolve the problem of grain coarsening occurring in the fusion zone and the heat-affected zone during conventional gas tungsten arc welding(C-GTAW) welded titanium alloy, which severely restricts the improvement of weld mechanical properties, welding experiments on Ti-6Al-4V titanium alloy by adopting ultra-high frequency pulse gas tungsten arc welding (UHFP-GTAW) technique were carried out to study arc characteristics and weld bead microstructure. Combined with image processing technique, arc shapes during welding process were observed by high-speed camera. Meanwhile the average arc pressure under various welding parameters were obtained by adopting pressure measuring equipment with high-precision. In addition, the metallographic samples of the weld cross section were prepared for observing weld bead geometry and microstructure of the fusion zone. The experimental results show that, compared with C-GTAW, UHFP-GTAW process provides larger arc energy density and higher proportion of arc core region to the whole arc area. Moreover, UHFP-GTAW process has the obviously effect on grain refinement, which can decrease the grain size of the fusion zone. The results also revealed that a significant increase of arc pressure while increasing pulse frequency of UHFP-GTAW, which could improve the depth-to-width ratio of weld beads.

Modelling and measurements of gas tungsten arc welding in argon–helium mixtures with metal vapour

2021 ◽  
Author(s):  
Junting Xiang ◽  
Keigo Tanaka ◽  
Fiona F. Chen ◽  
Masaya Shigeta ◽  
Manabu Tanaka ◽  
...  
Keyword(s):  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Metal Vapour ◽  
Helium Mixtures ◽  
Gas Tungsten Arc ◽  
Gas Tungsten
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