Uniform design and optimization of active agent and technology research for A-TIG welding of 2219 aluminum alloy

2017 ◽  
Vol 92 (9-12) ◽  
pp. 3435-3446 ◽  
Author(s):  
H. Li ◽  
J. S. Zou ◽  
J. S. Yao ◽  
H. P. Peng
Keyword(s):  
Aluminum Alloy ◽  
Uniform Design ◽  
Active Agent ◽  
Tig Welding ◽  
Technology Research ◽  
Design And Optimization ◽  
A Tig Welding ◽  
2219 Aluminum Alloy

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.

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.

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.

scholarly journals Study on Quality Prediction of 2219 Aluminum Alloy Friction Stir Welding Based on Real-Time Temperature Signal

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3496
Author(s):  
Haijun Wang ◽  
Diqiu He ◽  
Mingjian Liao ◽  
Peng Liu ◽  
Ruilin Lai
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Prediction Model ◽  
Real Time ◽  
Support Vector ◽  
Weld Quality ◽  
Prediction Ability ◽  
Friction Stir ◽  
Temperature Signal ◽  
2219 Aluminum Alloy

The online prediction of friction stir welding quality is an important part of intelligent welding. In this paper, a new method for the online evaluation of weld quality is proposed, which takes the real-time temperature signal as the main research variable. We conducted a welding experiment with 2219 aluminum alloy of 6 mm thickness. The temperature signal is decomposed into components of different frequency bands by wavelet packet method and the energy of component signals is used as the characteristic parameter to evaluate the weld quality. A prediction model of weld performance based on least squares support vector machine and genetic algorithm was established. The experimental results showed that, when welding defects are caused by a sudden perturbation during welding, the amplitude of the temperature signal near the tool rotation frequency will change significantly. When improper process parameters are used, the frequency band component of the temperature signal in the range of 0~11 Hz increases significantly, and the statistical mean value of the temperature signal will also be different. The accuracy of the prediction model reached 90.6%, and the AUC value was 0.939, which reflects the good prediction ability of the model.

scholarly journals Influence of Activated Fluxes on the Bead Shape of A-TIG Welds on Carbon and Low-Alloy Steels in Comparison with Stainless Steel AISI 304L

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 530
Author(s):  
Jerzy Niagaj
Keyword(s):  
Stainless Steel ◽  
Penetration Depth ◽  
High Strength ◽  
Tig Welding ◽  
Low Alloy Steels ◽  
Aisi 304L ◽  
A Tig Welding ◽  
Alloy Steels ◽  
Steel Aisi ◽  
Stainless Steel Aisi

The article presents results of comparative A-TIG welding tests involving selected unalloyed and fine-grained steels, as well as high-strength steel WELDOX 1300 and austenitic stainless steel AISI 304L. The tests involved the use of single ingredient activated fluxes (Cr2O3, TiO2, SiO2, Fe2O3, NaF, and AlF3). In cases of carbon and low-alloy steels, the tests revealed that the greatest increase in penetration depth was observed in the steels which had been well deoxidized and purified during their production in steelworks. The tests revealed that among the activated fluxes, the TiO2 and SiO2 oxides always led to an increase in penetration depth during A-TIG welding, regardless of the type and grade of steel. The degree of the aforesaid increase was restricted within the range of 30% to more than 200%.

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