Experimental Research of Activating Fluxes in A-TIG Welding of 5052 Aluminum Alloy

2014 ◽  
Vol 941-944 ◽  
pp. 2058-2061 ◽  
Author(s):  
Ze Jie Zhou ◽  
Zhi Chao Huang
Keyword(s):  
Aluminum Alloy ◽  
Experimental Research ◽  
Tig Welding ◽  
Experimental Results ◽  
Weld Penetration ◽  
Weld Shape ◽  
Activating Flux ◽  
A Tig Welding ◽  
Weld Forming ◽  
Welding Productivity

AC A-TIG welding on 5052 aluminum alloy was investigated. The single component of oxide TiO2, SiO2, Cr2O3, V2O5 and halide CaF2 was served as activating fluxes to study the effect on weld penetration and weld forming. The experimental results show that weld penetration can be increased and welding productivity can be improved in A-TIG welding. Activating fluxes, especially TiO2 and SiO2, have more significant effect on weld penetration than conventional TIG welding, moreover the better weld shape formed after coating activating flux is obtained, weld width has slight decrease that makes HAZ of A-TIG welding smaller.

Study on A-TIG Welding Technology for 12 mm Thick 304 Stainless Steel Plate

2015 ◽  
Vol 817 ◽  
pp. 337-341
Author(s):  
Yao Yong Yi ◽  
Guan Hui Liu ◽  
Yu Peng Zhang ◽  
Zi Yi Luo ◽  
Lei Xu
Keyword(s):  
Stainless Steel ◽  
High Efficiency ◽  
Bond Line ◽  
Tig Welding ◽  
Steel Plates ◽  
304 Stainless Steel ◽  
Activating Flux ◽  
Full Penetration ◽  
A Tig Welding ◽  
New Variant

A-TIG welding is a new variant of high-efficiency TIG weld technology, the weld penetration can be improved by using surface activating fluxes. In the present work, 12 mm thick stainless steel plates were welded by A-TIG method utilizing self-developed oxide-based composite activating flux. Results showed that for 12 mm thick stainless steel plates, weld joint of full penetration and one-side welding with back formation and good weld appearance could be achieved by A-TIG welding. Furthermore, compared with traditional TIG welding, the microstructure of A-TIG weld was finer, directivity of dendritic crystals near weld bond line was weaker, and mechanical properties of weld joints was also superior.

Effect on Formation of 5083 Aluminum Alloy of Activating Flux in FBTIG Welding

2011 ◽  
Vol 311-313 ◽  
pp. 2385-2388 ◽  
Author(s):  
Yong Zhao ◽  
Gang Yang ◽  
Keng Yan ◽  
Wei Liu
Keyword(s):  
Surface Tension ◽  
Aluminum Alloy ◽  
Single Component ◽  
Surface Tension Gradient ◽  
Width Ratio ◽  
Weld Penetration ◽  
Weld Formation ◽  
Activating Flux ◽  
Arc Shape ◽  
5083 Aluminum Alloy

FBTIG(Flux Bounded TIG)welding experiments for aluminum alloy were made using five species of single-component activating fluxes, including SiO2、TiO2、CaF2、MgO, and NaCl, which was carried out to investigate the effects of flux gap and activating fluxes on weld formation. The mechanism of increasing welding penetration was analyzed linked with the change of arc shape in FBTIG. The experimental results indicate that five species of single-component activating fluxes can increase weld penetration obviously. Specifically, SiO2 can increase weld penetration remarkably. When flux gap is 4mm, the D/W (depth/width) ratio of weld for FBTIG welding reaches 0.59. The significant increase of weld penetration is the result of comprehensive effect by arc contraction and reversal of the surface tension gradient in the liquid metal.

Research on Metallurgical Structure and Hardness of LY12 Aluminum Alloy Weld Zone under TIG and A-TIG

2012 ◽  
Vol 472-475 ◽  
pp. 1366-1369
Author(s):  
Yan Wang
Keyword(s):  
Aluminum Alloy ◽  
Basal Body ◽  
Weld Zone ◽  
Welding Current ◽  
Strengthening Phase ◽  
Activating Flux ◽  
A Tig Welding ◽  
Metallurgical Structure ◽  
Welding Procedure ◽  
Alloy Weld

This paper studied and framed TIG and A-TIG welding procedure of LY12 aluminum alloy and analyzed the metallurgical structure and hardness of weld zone of TIG and A-TIG under different welding current. The result showed the strengthening phase which separated out from the basal body of TIG weld zone was obviously fewer than A-TIG and the strengthening phase of TIG obviously decreased when welding current increased. Compared with TIG weld zone, surface activating flux changed the metallurgical structure of A-TIG weld zone and the strengthening phase of A-TIG weld zone was more than TIG. The strengthening phase of A-TIG weld zone did not obviously decreased when welding current increased that implied the strengthening phase of A-TIG did not obviously dissolve into the basal body as TIG and only coarsened with the increase of welding current. The hardness experiment of weld zone showed that the hardness of A-TIG weld zone was higher than TIG and the hardness of 60%NaF+40%SiO2 activating flux of A-TIG weld zone was higher than 40%NaF+60%SiO2 activating flux.

scholarly journals A Study on the Effect of Different Activating Flux on A-TIG Welding Process of Incoloy 800H

2016 ◽  
Vol 16 (3) ◽  
pp. 26-37 ◽  
Author(s):  
S.P. Sridhar ◽  
S. Arun Kumar ◽  
P. Sathiya
Keyword(s):  
Process Parameters ◽  
Welding Process ◽  
Tig Welding ◽  
Depth Of Penetration ◽  
Activating Flux ◽  
Incoloy 800H ◽  
A Tig Welding

Abstract This study investigates the effect of different activating flux such as V2O5, TiO2, MoO3, Cr2O3, and Al2O3 on A-TIG welding process of Incoloy 800H. The influence of the flux on the depth of penetration and on mechanical and metallurgical characteristics of the weld were studied and compared with autogeneous TIG welds which were welded with the same process parameters and conditions. The use of TiO2 flux gave full depth of penetration and the use of V2O5, Cr2O3 flux gave increased penetration as compared to autogeneous TIG welds while the use of Al2O3 and MoO3 led to the detoriation of the effect.

Effect of Compound Fluxes on A-TIG Welding Joint Depth of Cu-Cr-Zr Alloy

2013 ◽  
Vol 749 ◽  
pp. 133-140
Author(s):  
Wen Hong Jiang ◽  
Ran Dong Yu ◽  
Sheng Lu
Keyword(s):  
Copper Alloy ◽  
Design Method ◽  
Uniform Design ◽  
Tig Welding ◽  
Depth Of Field ◽  
Weld Penetration ◽  
A Tig Welding ◽  
Uniform Design Method ◽  
Pure Surface ◽  
Zr Alloy

A-TIG welding for Cu-Cr-Zr copper alloy was carried out on the eleven pure surface activating fluxes including oxides, fluorides and chlorides on the welding formation and the weld D/W ratio by the means of super depth of field and metallurgical microscope. It was found that the oxides and fluorides could improve welding penetration remarkably, especially with CaF2,ZnF2,SiO2 andCr2O3. Four compound fluxes were chosen from the eleven pure surface activating fluxes, which could increase the penetration and modify the welding shape. An optimized formula composed of the four compounds (CaF2,ZnF2,SiO2 and Cr2O3) was developed by using the formula of uniform design method. It showed that the optimized formula could reach a good weld ability and its weld penetration was 2.5 times more than that of TIG.

A-TIG Welding of a Stainless Steel

2008 ◽  
Vol 587-588 ◽  
pp. 370-374 ◽  
Author(s):  
Altino Loureiro ◽  
A. Rodrigues
Keyword(s):  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Bead Geometry ◽  
Shielding Gases ◽  
Weld Penetration ◽  
Weld Bead Geometry ◽  
Activating Flux ◽  
A Tig Welding ◽  
Δ Ferrite ◽  
Helium Mixture

The aim of this research is the development of activating fluxes to improve weld bead geometry and increase weld penetration depth in austenitic stainless steels. The effect on bead geometry of two home-made fluxes, composed of titanium and aluminium oxides, was studied, in combination with two shielding gases, respectively Argon and an Argon/Helium mixture. A significant increase in penetration was obtained in welds done with the Ti based activating flux across the whole range of welding currents for both shielding gases, which was not the case for welds performed with the Al based flux. A decrease in δ-ferrite content in the weld metal with increasing current was observed only in welds done with the Ti based flux.

Study of 2219 aluminum alloy using direct current A-TIG welding

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744043
Author(s):  
Hui Li ◽  
Jiasheng Zou
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Aluminum Alloy ◽  
Direct Current ◽  
Active Agent ◽  
High Strength ◽  
Tig Welding ◽  
Al Alloy ◽  
A Tig Welding ◽  
2219 Aluminum Alloy

Direct current A-TIG (DCEN A-TIG) welding using special active agent had eliminated the pores and the oxidation of 2219 high-strength aluminum alloy in welding. Addition of AlF3–25% LiF active agent to DCEN A-TIG welding and arc morphology showed a trailing phenomenon. However, the change in arc morphology was not remarkable when AlF3–75% LiF active agent was added. Addition of AlF3–75% LiF active agent can refine the grain size of DCEN A-TIG joint. The mechanical properties of the weld were optimal at 10% AlF3–75% LiF active agent. Compared with AC TIG and AC A-TIG welding, DCEN A-TIG welding yielded better results for 2219 Al alloy.

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