scholarly journals Arc Characteristics and Welding Process of Magnetic Field Assisting Plasma-GMAW-P

2021 ◽  
Vol 100 (01) ◽  
pp. 1-12
Author(s):  
JIANG YU ◽  
◽  
HONGTAO ZHANG ◽  
PENG HE ◽  
XIAO YANG ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Gas Flow ◽  
Gas Metal Arc Welding ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Welding Current ◽  
Electrical Signal ◽  
Maximum Temperature ◽  
Low Carbon ◽  
The Magnetic Field

Low-carbon steel Q235B was successfully joined by plasma-pulsed gas metal arc welding (plasma-GMAW-P) with an external magnetic field. The arc profile, temperature field, electrical signal, microstructure, and mechanical properties of this method were analyzed. The results indicated that the coupling degree of the two arcs increased with the strengthening of the magnetic field current. However, when the magnetic field current was greater than 1 A, the arc pro-file changed slightly with the increase of the magnetic field current. Fixed on the magnetic field current, the coupling degree first increased and then decreased with the increase of the plasma welding current, GMAW-P welding current, plasma gas flow rate, and nozzle height, respectively. The maximum temperature had no obvious influence on joint penetration at different magnetic field cur-rents. However, the average temperature had an inverse effect on joint penetration at different magnetic field currents. The weld fusion zone joint tensile test results showed that the ratio of depth to width increased with the application of magnetic field currents. Moreover, tensile strength on the upper and lower part of the tensile samples were 521 and 488 MPa, respectively, which were 4.6% and 3.2% higher than those without the magnetic field. The microhardness of the weld joints was higher than that without the magnetic field.

Experimental Study on the Single-Sided Double-Point Resistance Welding of Bus Roof Skin

2014 ◽  
Vol 680 ◽  
pp. 97-101
Author(s):  
Hai Bin Huang ◽  
Jian Chun Liu ◽  
Xiao Long Ke ◽  
Xiao Hui Lin
Keyword(s):  
Double Point ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Welding Current ◽  
Resistance Welding ◽  
Galvanized Steel ◽  
Low Carbon ◽  
Support Mechanism ◽  
Experiment Platform ◽  
Weld Area

In order to weld the skin and skeleton of bus roof, it analysis the welding process of bus Outer Roof-panels , and specify the weld area and solder joint distance of outer roof-panel firstly , then built a single-sided double-point resistance welding experiment platform for bus outer roof-panels, the platform consists of guide、gantry、gantry moving mechanism、 pneumatic torch、electrode support mechanism、transformers、torch lateral movement organizations and torch longitudinal movement phenomenon . it set the unevenness of the skin and the skeleton as 1mm, single-sided double-point resistance welding experiment was conducted on the welding experiment platform. The experimental results of welding area visual examination and tear experiments indicate that welding heat will penetrate the skeleton when the welding current is greater than 11.0KA;the welding Reliability of galvanized steel is better than low carbon steel.

Microstructure and Properties under Alternating Magnetism after Hot Rolling

2014 ◽  
Vol 1004-1005 ◽  
pp. 1256-1259
Author(s):  
Shen Bai Zheng ◽  
Shi Jie Liu ◽  
Hong Bin Li ◽  
Bin Feng ◽  
Xue Song Hui
Keyword(s):  
Magnetic Field ◽  
Carbon Steel ◽  
Cold Rolling ◽  
Grain Growth ◽  
Hot Rolling ◽  
Magnetic Field Intensity ◽  
Raw Materials ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
The Magnetic Field

The austenite steel after rolling was radiated by the alternating magnetism, and the effects that alternating magnetic on the austenite transition was studied. The result shows that the alternating magnetism promotes the austenitic grain growth of low carbon steel. If the magnetic field intensity is increased, it could provide better performance of raw materials to cold rolling processing.

scholarly journals Characteristics of Magnetic Field Assisting Plasma GMAW-P

2020 ◽  
Vol 99 (1) ◽  
pp. 25s-38s
Author(s):  
JIANG YU ◽  
◽  
BO WANG ◽  
HONGTAO ZHANG ◽  
PENG HE ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Speed ◽  
Gas Metal Arc Welding ◽  
Welding Current ◽  
Plasma Welding ◽  
Droplet Transfer ◽  
Spray Transfer ◽  
The Wire ◽  
Indirect Arc ◽  
The Magnetic Field

The droplet transfer and voltage-current characteristics of gas metal arc welding (GMAW) in single-pulsed GMAW (single GMAW-P), plasma pulsed GMAW (plasma GMAW-P), and plasma-GMAW-P with a magnetic field were studied using the synchronous acquisition system of high-speed camera and electric signals. The results showed the plasma arc and magnetic field had a significant effect on the droplet transfer process. The indirect arc of the plasma and gas metal arc emerged in the pulse peak phase causing a shunt phenomenon of the GMAW current. The period of the indirect arc was increased under the action of the magnetic field. In hybrid plasma GMAW-P, when the GMAW current did not exceed 140 A, several pulsed one-drop free transfers occurred and the droplet transfer period decreased with the increase in the plasma welding current; when the GMAW current exceeded 140 A, and the plasma welding current was less than 180 A, spray transfer was formed. The droplet transfer transformed into a projected transfer when the plasma welding current increased to 180 A. In plasma-GMAW-P hybrid welding with a magnetic field, the magnetic field had a slight effect on the transfer period. When the GMAW current did not exceed 140 A, the droplet transfer was mainly repelled transfer. The detaching location was on the right side of the wire when the magnetic field current was less than 3 A. When the magnetic field current exceeded 3 A, it was below or on the left side of the wire. When the GMAW current exceeded 140 A and the magnetic field current was less than 5 A, spray transfer was formed, but the droplet transfer mode transformed into a projected transfer with a magnetic field current of 5 A.

Droplet Transfer and Microstructure of Q235 Steel Thick Plate Using CO2 Welding with Additional Longitudinal Magnetic Field Controlling

2010 ◽  
Vol 102-104 ◽  
pp. 451-454
Author(s):  
Qian Luo ◽  
Duan Min Lu ◽  
Jian Luo
Keyword(s):  
Magnetic Field ◽  
Thick Plate ◽  
Longitudinal Magnetic Field ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Low Carbon ◽  
Droplet Transfer ◽  
Welding Seam ◽  
Co2 Welding ◽  
Welding Joints

In this paper, a new welding experiment is studied by applying an additional longitudinal electromagnetic field to CO2 welding process (abbr. LEM-CO2 welding).The characteristics of droplet transfer, macrostructure and microstructure are compared between LEM- CO2 welding and general CO2 welding on Q235 low carbon steel thick plate joint. The research results shows that, an additional longitudinal magnetic field can have a significant effect on properties of the droplet transfer in CO2 welding, the frequency and stability of the droplet transfer in LEM-CO2 welding are improved. The grains of welding seam are refined and welding joints has a higher quality. So the additional longitudinal magnetic field is a very simple and effective method to improve the properties of CO2 welding thick plate joint.

Microstructures and Properties of Co-Based Alloy Surfacing Layer with Longitudinal Magnetic Field

2010 ◽  
Vol 154-155 ◽  
pp. 1271-1274
Author(s):  
Yun Hai Su ◽  
Zheng Jun Liu ◽  
Ming Su
Keyword(s):  
Magnetic Field ◽  
Wear Resistance ◽  
Longitudinal Magnetic Field ◽  
Low Carbon Steel ◽  
Xrd Analysis ◽  
Wear Loss ◽  
Low Carbon ◽  
Dc Magnetic Field ◽  
Optimal Values ◽  
The Magnetic Field

In order to systematically study the influence of surfacing current and magnetic field current on hardness and wear resistance of surfacing layer, longitudinal DC magnetic field was applied during plasma arc surfacing Co-based alloy on low-carbon steel. The hardness, wear resistance, microstructure and phase constitution of the surfacing layer were investigated through the tests of hardness, wear, SEM and XRD analysis. The results show that the surfacing current and magnetic field current must be matched properly to achieve the optimal properties of surfacing layer. The optimal values are obtained when the surfacing current is 160A and the magnetic field current is 3A, where the hardness is 43.7 HRC and the wear loss is 0.5493g. The proper electromagnetic stirring induced by electromagnetic field can not only refine the microstructure but also improve the hardness and wear resistance of the surfacing layer.

scholarly journals EFFECT OF WELDING PROCESS PARAMETERS ON TENSILE OF LOW CARBON STEEL 283 G.C

2022 ◽  
Vol 26 (1) ◽  
pp. 79-86
Author(s):  
Hussain Hayyal ◽  
◽  
Nadhim M. Faleh ◽  
Keyword(s):  
Carbon Steel ◽  
Tensile Stress ◽  
Welded Joints ◽  
Arc Welding ◽  
Low Carbon Steel ◽  
Base Material ◽  
Welding Process ◽  
Welding Current ◽  
Low Carbon ◽  
Tungsten Electrode

In this study, three welding methods are used. The purpose to investigation the effects of SMAW, SAW, and gas tungsten arc welding (GTAW) on the tensile stress of low carbon steel conforming to ASTM 283 c. 8mm thick plates are used as base material for butt welded joints. The tensile properties of the welded joints were evaluated and the results were compared by experts using the Taguchi method to design three levels of each parameter (current, voltage and displacement speed). From this research, it is found that compared to metal shielded arc welding and submerged arc welding, the pulling effect of the gas shielded welding joint of the tungsten electrode is the best. This is mainly due to the presence of The results of using analysis of variance (ANOVA) to estimate important parameters show that welding current and speed of the weld have a significant effect on tensile stress .the experimental results are in agreement with predicted results, and the maximum error is 3%..

scholarly journals Analysis Of Mechanical Properties SMAW (Shielded Metal Arc Welding) Welding Joints Of Portable Electric Hydraulic Jack Frame

2021 ◽  
Vol 7 (2) ◽  
pp. 155
Author(s):  
Andika Wisnujati ◽  
Juni Andryansyah
Keyword(s):  
Arc Welding ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Welding Current ◽  
Pressure Vessels ◽  
Low Carbon ◽  
Shielded Metal Arc Welding ◽  
Repair Work ◽  
Metal Arc Welding ◽  
Cooling Media

Welding is a very important part of the development and growth of the industry because it has a role in engineering, reparation, and construction. Shielded   Metal   Arc Welding (SMAW) or the conventional arc welding   process is particularly dominant in structural joints, pressure vessels and in maintenance and repair work. In welding, different metals are joined economically and at a much faster rate as compared with other fabrication processes like riveting and casting. The purpose of this research is to find out the cooling media cooler against SMAW smelter tensile strength by using the E6013 electrode. This study uses low carbon steel material that has levels Fe = 98,3%; C = 0,30%, Si = 0,23%. The material is given 75A welding current with cooling variation on the connection result using oil, water, and room temperature. The highest tensile stress value obtained in the oil cooling treatment was 844,76 N/mm2, the highest strain value was obtained on the raw materials of 16%, the highest elasticity value was obtained in the oil cooling treatment of 703.96 N/mm2. According to the research results can be concluded that the variations of cooling media greatly affect the strength of the welding connection.

scholarly journals Magnetic Field Effects on 4G Positions in Shielded Metal Arc Welding Process

2020 ◽  
Vol 9 (3) ◽  
pp. 694-703 ◽  
Keyword(s):  
Magnetic Field ◽  
Arc Welding ◽  
Molten Pool ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Butt Joint ◽  
Low Carbon ◽  
Magnetic Field Effects ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding

With the advancement of welding techniques, Arc-welding is one of the most commonly and widely used welding technique for variety of purposes. The underside of welding to be performed makes the molten pool going downward because of gravity vector pulling affects the molten pool. The main purpose of this study is to study how the molten of electrode produced reduce on going downward and produce a good root fusion in overhead position of welding in single V-butt joint with the help of magnetic field on the workpiece. The study of magnet characteristic which includes thebehaviour of molten pool toward magnetic field, the macrostructure and microstructure and its strength should be carried out. Each magnet strength has their own characteristics that affects toward weldment on base metal.As a result, it can be concluded that having a magnetic field applies on base metal A36 low carbon steel may reduce the molten pool from going downward. The selection of a correct magnet strength and welding process may produce good and quality weldment especially in terms of its weld properties and geometry.

Effect of Austenite Transition under Pulsating Magnetism

2013 ◽  
Vol 634-638 ◽  
pp. 1704-1707
Author(s):  
Shen Bai Zheng ◽  
Shao Hui Pan ◽  
Hui Wen ◽  
Xiaog Xiong Wang
Keyword(s):  
Magnetic Field ◽  
Carbon Steel ◽  
Cold Rolling ◽  
Grain Growth ◽  
Magnetic Field Intensity ◽  
Raw Materials ◽  
Low Carbon Steel ◽  
Intermediate Frequency ◽  
Low Carbon ◽  
The Magnetic Field

The austenite steel was radiated by the intermediate frequency pulsating magnetism, and the effects that pulsating magnetic on the austenite transition was studied. The result shows that the pulsating magnetism promotes the austenitic grain growth of low carbon steel. If the magnetic field intensity is increased, it could provide better performance of raw materials to cold rolling processing.

Distortion Analysis on Multipassed Butt Weld Using FEM and Experimental Study

2011 ◽  
Vol 311-313 ◽  
pp. 811-814
Author(s):  
Mohd Ridhwan Mohammed Redza ◽  
Yupiter H.P. Manurung ◽  
Robert Ngendang Ak. Lidam ◽  
Mohd Shahar Sulaiman ◽  
Mohammad Ridzwan Abdul Rahim ◽  
...  
Keyword(s):  
Gas Metal Arc Welding ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Travel Speed ◽  
Source Model ◽  
Low Carbon ◽  
Robotic Welding ◽  
Butt Weld ◽  
Metal Arc Welding ◽  
Weld Distortion

This paper investigates the simulation technique for analyzing the distortion behavior induced by welding process on welded plate which was clamped on one side. This clamping method is intended to enable the investigation of the maximum distortion on the other side. FEA software SYSWELD was employed to predict multipassed butt weld distortion of low carbon steel with thicknesses of 6 mm and 9 mm. The simulation begins with the development of model geometry and meshing type followed by suitable selection of heat source model represented by the Goldak’s double ellipsoid model. Other parameters such as travel speed, heat input, clamping method etc. were determined. The model is dedicated for multipass welding techniques using Gas Metal Arc Welding (GMAW). The experimental works were conducted by using Robotic welding process.

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