scholarly journals Arc Welding-Laser Shock Forging Process for Improving the Mechanical Properties of the Fe-Cr-C Cladded Layer

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Yunpeng Fan ◽  
Chong Zhang ◽  
Hongtao He ◽  
Fengwei Zhang ◽  
Yongkang Zhang
Keyword(s):  
Mechanical Properties ◽  
Fusion Zone ◽  
Arc Welding ◽  
Sliding Wear ◽  
Welding Current ◽  
Laser Shock ◽  
Bead Width ◽  
Steel Pipes ◽  
Shock Frequency ◽  
Cladding Material

While parts can be repaired via arc welding (AW), it is usually necessary to add some types of excitation method to improve the mechanical properties of the cladded layer. Here, the arc welding-laser shock forging (AW-LSF) was used to repair Q235 steel pipes (Fe-Cr-C alloy was used as the cladding material). The effects of the welding current (WC), welding speed (WS), and laser shock frequency (LSF) on the geometry and microhardness of the weld bead were studied. The AW-LSF and AW repair processes were compared. The results demonstrate that the bead width (W) and penetration depth (D) increase with the WC, while the weld height (H) decreases with the WC. The H, W, and D all decrease with the WS; W and D increase with the LSF; and H decreases with the LSF. As the WC increases, the hardness of the fusion zone (FZ) and partial fusion zone (PFZ) decreases significantly, while the hardness of the heat-affected zone (HAZ) remains nearly unchanged. As the WS increases, the hardness of the PFZ decreases, while the hardness of the FZ and HAZ remains nearly unchanged. With the increase of the LSF, the hardness of the PFZ, FZ, and HAZ increases. Compared with AW, the AW-LSF can reduce the cladded layer crystal grain size, increase the hardness, and improve the sliding wear resistance.

Study on the Microstructure and the Mechanical Properties of TA2

2012 ◽  
Vol 472-475 ◽  
pp. 2655-2658
Author(s):  
Xiao Dong Hu ◽  
Sen Zhang ◽  
Yong Zhang ◽  
Ya Jiang Li
Keyword(s):  
Mechanical Properties ◽  
Fusion Zone ◽  
Weld Joint ◽  
Arc Welding ◽  
Weld Zone ◽  
Base Material ◽  
Annealing Treatment ◽  
Welding Joint

The microstructure and the mechanical properties of welding joint with the material of TA2 have been studied in this paper with the specimens made with the method of argon-arc welding. The microhardness of the welding joint has been compared with the hardness in the same position of the weld joint after annealing. Conclusions have been obtained as follows: The organizations of the welding joint include base material, recrystallization zone, overheated area, fusion zone and the weld zone; the hardness tendency of the weld joint is depicted as M-shape with the softest point located at the center, and the hardest is located at the overheated zone; the annealing treatment can enhance the weld joint hardness mainly at the center, and the hardness of other zones change little.

Study on the Microstructure and the Mechanical Properties of Zr R60702

2012 ◽  
Vol 510 ◽  
pp. 679-682 ◽  
Author(s):  
Xiao Dong Hu ◽  
Sen Zhang ◽  
Yong Zhang ◽  
Ya Jiang Li
Keyword(s):  
Mechanical Properties ◽  
Fusion Zone ◽  
Weld Joint ◽  
Arc Welding ◽  
Weld Zone ◽  
Base Material ◽  
Annealing Treatment ◽  
Welding Joint

The microstructure and the mechanical properties of welding joint with the material of R60702 have been studied in this paper with the specimens made with the method of argon-arc welding, and the according mechanical properties of the weld joint have been compared with the annealed microstructure at the temperature of 600.Conclusions have been obtained as follows: The organizations of the welding joint include base material, normalizing zone, overheated area, fusion zone and the weld zone; the hardness tendency of the weld joint is depicted as W-shape with the hardest point located at the center, and the softest points is located at the normalizing zone; the annealing treatment can improve the ductility and soften the weld joint mainly at the center.

scholarly journals EVALUATION AND MECHANICAL PROPERTIES OF PLASMA ARC WELDED IS2062 STEEL TUBE JOINTS

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
Subravel V ◽  
Prabu S
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Weld Metal ◽  
Arc Welding ◽  
Weld Zone ◽  
Welding Current ◽  
Steel Tube ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Different Levels

In th present work, an attempt has been made to study the effect of plasma arc welding on fusion characteristics of IS 2062 joints. Joints were fabricated using different levels of welding current (140 Amp –160 Amp). The formation of the amount of ferrite in the weld metal controls the microstructural evolution during high-temperature service and higher hardness in the fusion zone, which is due to martensitic formation in the weld zone

The Effect of Welding Parameter on Mechanical Properties and Macrostructure of AA1100 Using Autogenous Tig Welding

2020 ◽  
Vol 17 (1) ◽  
pp. 7562-7569
Author(s):  
Ario Sunar Baskoro ◽  
Indra Milyardi ◽  
Mohammad Azwar Amat
Keyword(s):  
Mechanical Properties ◽  
Welding Speed ◽  
Welding Current ◽  
Butt Joint ◽  
Tig Welding ◽  
Welding Parameter ◽  
Bead Width ◽  
Cross Sectional ◽  
X Ray ◽  
Characteristic Effect

In this paper, an autogenous tungsten inert gas (TIG) welding was performed to understand the characteristic effect of butt joint weld on AA1100 under various parameters. The effect of TIG current and welding speed was selected to study the mechanical properties, porosity, and macrostructure of the weld metal (WM). Based on experimental results, the top bead width (TBW) will increase directly proportional to the increased of welding current. Furthermore, welding current and welding speed affected the strength drop in the heat-affected zone (HAZ). More heat added will result in a deeper drop in strength. Mechanical properties result showed that the tensile strength reduced by 40 – 45% and the hardness reduction in the WM and HAZ area from the base metal (BM) was 17.3% and 27.7%, respectively. Subsequently, X-Ray radiography images showed that there was no large porosity occur in all welding current. The macrostructure showed that the weld bead typically has the concavity shape or U-shaped geometry from a cross-sectional view.

scholarly journals Analysis of Current on Mechanical Properties and Microstructure of A53 Gr B Material with Gas Tungsten Arc Welding Process

Teknik ◽  
2021 ◽  
Vol 42 (1) ◽  
pp. 20-28
Author(s):  
Tarmizi Tarmizi ◽  
Yudha Bakti Nugraha ◽  
Irfan Irfan
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Gas Flow ◽  
Welding Process ◽  
Welding Current ◽  
Gas Tungsten Arc Welding ◽  
Correct Process ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Arc Welding Process

The welding use correct process parameters will produce joint with optimum in mechanical properties. The current is a very important process parameter in welding. Gas Tungsten Arc Welding process carbon steel A53 Gr B uses current variations can be an option to get the best quality joints. The purpose of this research is to get optimum mechanical properties and microstructure by varying the current. The experimental method uses GTAW process by varying current in welding A 53 Gr B using a single V butt joint and a 5G welding position, the Argon protective gas flow rate of 15 liters per minute with filler rod ER 70 S-6. This process also uses 11-13 Volt voltage with DCEN polarity and current 70, 90, and 110A. Based on ASME Section IX, the test results show that the specimen with a current of 90A gives optimum results with a tensile strength of 480 MPa and a hardness value of 190 HV, whereas specimens with welding current of 70A bring incomplete penetration defects in the weld area. The use of welding current 90A in this research provides welding results with better mechanical properties and microstructure compared to the use of currents of 70 and 110A

Studies on the Parametric Effects of Plasma Arc Welding of 2205 Duplex Stainless Steel

2018 ◽  
Vol 37 (3) ◽  
pp. 219-232 ◽  
Author(s):  
R. Selva Bharathi ◽  
N. Siva Shanmugam ◽  
R. Murali Kannan ◽  
S. Arungalai Vendan
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Welding Speed ◽  
Arc Welding ◽  
Welding Current ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Arc Length ◽  
Depth Of Penetration ◽  
Bead Width

AbstractThis research study attempts to create an optimized parametric window by employing Taguchi algorithm for Plasma Arc Welding (PAW) of 2 mm thick 2205 duplex stainless steel. The parameters considered for experimentation and optimization are the welding current, welding speed and pilot arc length respectively. The experimentation involves the parameters variation and subsequently recording the depth of penetration and bead width. Welding current of 60–70 A, welding speed of 250–300 mm/min and pilot arc length of 1–2 mm are the range between which the parameters are varied. Design of experiments is used for the experimental trials. Back propagation neural network, Genetic algorithm and Taguchi techniques are used for predicting the bead width, depth of penetration and validated with experimentally achieved results which were in good agreement. Additionally, micro-structural characterizations are carried out to examine the weld quality. The extrapolation of these optimized parametric values yield enhanced weld strength with cost and time reduction.

A Study on Experimental Design Methods for the Automatic GMA Welding Process

2019 ◽  
Vol 294 ◽  
pp. 119-123
Author(s):  
Zong Liang Liang ◽  
Tae Jong Yun ◽  
Won Bin Oh ◽  
Bo Ram Lee ◽  
Ill Soo Kim
Keyword(s):  
Experimental Design ◽  
Taguchi Method ◽  
Arc Welding ◽  
Gma Welding ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Welding Current ◽  
Welding Parameters ◽  
Bead Width ◽  
Arc Welding Process

Generally, the welding parameters directly affect the weld forming and the joint performance. Because many parameters are involved in the automatic arc welding process, it is not realistic to use traditional experimental methods, such as full factorial design. Therefore, it is important to find out the good experimental design method to determine the welding parameters for optimal joint quality with a minimal number of experiments. Therefore, this study is aimed at investigating the effect of DOE (Design of Experiment) methods on bead width of mild steel parts welded by the automatic GMA (Gas Metal Arc) welding process. In this work, Taguchi method was used for studying the effect of the welding parameters on optimization of bead width, while Box-Behnken method was utilized to develop a mathematical model relating the bead width to welding parameters such as welding voltage, arc current, welding speed and CTWD (Contact Tip to Work Distance). The S/N (Signal-to-Noise) ratio and the ANOVA (Analysis of Variance) were employed to find the optimal bead width. Confirmation tests were carried out to validate the effectiveness of the Taguchi method. The experimental results show that welding current mainly affected the bead width. The predicted bead width of 3.12mm was in good agreement with the confirmation tests. With the regression coefficient analysis in the Box-Behnken design, a relationship between bead width and four significant welding parameters was obtained. A second-order model has also been established between the welding parameters and the bead width as welding quality. The developed model is adequate to navigate the design space.

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