Preliminary Research for Development of MW-TIG Hybrid Welding System

2021 ◽  
Vol 1164 ◽  
pp. 9-15
Author(s):  
Robert Cristian Marin ◽  
Iulian Ştefan ◽  
Răzvan Ionuţ Iacobici ◽  
Sorin Vasile Savu
Keyword(s):  
Hybrid System ◽  
Welding Process ◽  
Temperature Monitoring ◽  
Geometrical Shape ◽  
Hybrid Welding ◽  
Microwave Generator ◽  
Plasma Arc ◽  
Shielding Gas ◽  
Base Materials ◽  
Welding System

The paper aims to report preliminary researches towards to development of new hybrid welding system by coupling a microwave beam with a TIG torch. The main research was focused on the designing of hybrid system as well as to establish the heating/welding mechanism by coupling two different thermal sources. Therefore, a specific welding chamber was designed taking into consideration the limitations provided by microwave waveguide technical specs, geometrical shape and dimensions of the TIG torch as well as the temperature monitoring during welding process and video surveillance for data recording. A microwave generator with adjustable power from 0 to 1250 W was coupled with a TIG torch and welding power source in order to establish the main parameters for hybrid system. The preliminary researches reported that the MW-TIG hybrid welding could be applied to eutectic joining of materials using low power (up to 600 W) injected from microwave generator as well as low welding current (up to 20 A). The flow of shielding gas have been established initially to 2 l/m. The research related to stabilization of MW-WIG plasma arc have been studied by increasing the flow of shielding gas up to 10 l/m. The results have shown that the microwave generator and TIG torch can be coupled to obtain hybrid-welding process without any matching tuning devices but with risks for damaging the microwave generator. Further researches will be done in order to design auxiliary devices to optimize the hybrid-welding process and to avoid any unwanted plasma arc discharge from welded base materials to microwave generator. In terms of temperature monitoring, an infrared pyrometer has been used. The IR pyrometer was targeted to the base materials in order to be able to measure their temperature without any influences from plasma arc. The results obtained have shown a stable plasma at average microwave power around 400 W even without any TIG current.

Effect of shielding gas flow on welding process of laser-arc hybrid welding and MIG welding

2019 ◽  
Vol 38 ◽  
pp. 530-542 ◽  
Author(s):  
Xiaoyi Yang ◽  
Hui Chen ◽  
Zongtao Zhu ◽  
Chuang Cai ◽  
Chengzhu Zhang
Keyword(s):  
Gas Flow ◽  
Welding Process ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Shielding Gas

scholarly journals Characteristics of Welding and Arc Pressure in the Plasma–TIG Hybrid Welding Process

2018 ◽  
Author(s):  
Bo Wang ◽  
Xunming Zhu ◽  
Hongchang Zhang ◽  
Hongtao Zhang ◽  
Jicai Feng
Keyword(s):  
Arc Welding ◽  
Gas Flow ◽  
Welding Process ◽  
Hybrid Welding ◽  
Plasma Arc ◽  
Arc Pressure ◽  
Arc Current ◽  
Arc Welding Process ◽  
Welding Processes

In this article, a novel hybrid welding process called plasma-TIG coupled arc welding was proposed to improve the efficiency and quality of welding by utilizing the full advantage of plasma and TIG welding processes. The two arcs of plasma and TIG were pulled into each other into one coupled arc under the effect of Lorentz force and plasma flow force during welding experiments. The arc behavior of coupled arc was studied by means of it’s arc profile, arc pressure and arc force conditions. The coupled arc pressure distribution measurements were performed. The effects of welding conditions on coupled arc pressure were evaluated and the maximum coupled arc pressure was improved compared with single-plasma arc and single-TIG arc. It was found that the maximum arc pressure was mainly determined by plasma arc current and plasma gas flow. According to the results, the proposed coupled arc welding process have both advantages of plasma arc and TIG method, and it has a broad application prospect.

Study of Titanium Foil Welding Using Micro-Plasma Arc Welding

2012 ◽  
Vol 538-541 ◽  
pp. 1469-1472 ◽  
Author(s):  
Fu Xin Wang ◽  
Jian Ping He ◽  
Jia Qiang Fang ◽  
Feng Xiang ◽  
Lei Lei Ren
Keyword(s):  
Arc Welding ◽  
Welding Process ◽  
Welding Current ◽  
Pulse Frequency ◽  
Titanium Foil ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Micro Plasma Arc Welding ◽  
Welding System ◽  
Peak Value

Ultra-thin Titanium foil, which is widely used in manufacture of thin-walled titanium tubes, automobile parts, medical and other industrial fields, is an excellent structural material. Micro-plasma arc welding system which was developed independently by Shanghai University of Engineering Science was used in the experiments of welding Titanium foil 0.05mm thick. Welding experiments were carried out with matching parameters including welding current type, welding current value, pulse frequency, ratio of peak value and base value of pulse current, amount of lap and the other welding process parameters set constant, achieved one side welding both sides formation and got good welding formation. Based on these experiments, influences on welding quality induced by those factors are analyzed.

scholarly journals Observation of Arc Behaviour in TIG/MIG Hybrid Welding Process

2020 ◽  
Vol 596 ◽  
pp. 012025
Author(s):  
Rose Alifah Ellyana Roslan ◽  
Sarizam Mamat ◽  
Pao Ter Teo ◽  
Firdaus Mohamad ◽  
Srinath Gudur ◽  
...  
Keyword(s):  
Welding Process ◽  
Hybrid Welding

scholarly journals Repair of Precision Castings Made of the Inconel 713C Alloy

2017 ◽  
Vol 17 (3) ◽  
pp. 210-216
Author(s):  
K. Łyczkowska ◽  
J. Adamiec
Keyword(s):  
Model Test ◽  
Aircraft Engine ◽  
Casting Defects ◽  
Exhaust Gas ◽  
Plasma Arc ◽  
Nickel Based Superalloy ◽  
Melted Zone ◽  
Base Materials ◽  
Inconel 713C ◽  
Engine Components

Abstract Inconel 713C precision castings are used as aircraft engine components exposed to high temperatures and the aggressive exhaust gas environment. Industrial experience has shown that precision-cast components of such complexity contain casting defects like microshrinkage, porosity, and cracks. This necessitates the development of repair technologies for castings of this type. This paper presents the results of metallographic examinations of melted areas and clad welds on the Inconel 713C nickel-based superalloy, made by TIG, plasma arc, and laser. The cladding process was carried out on model test plates in order to determine the technological and material-related problems connected with the weldability of Inconel 713C. The studies included analyses of the macro- and microstructure of the clad welds, the base materials, and the heat-affected zones. The results of the structural analyses of the clad welds indicate that Inconel 713C should be classified as a low-weldability material. In the clad welds made by laser, cracks were identified mainly in the heat-affected zone and at the melted zone interface, crystals were formed on partially-melted grains. Cracks of this type were not identified in the clad welds made using the plasma-arc method. It has been concluded that due to the possibility of manual cladding and the absence of welding imperfections, the technology having the greatest potential for application is plasma-arc cladding.

Effect of Ar-N2 Mixed Gas on Morphology and Microstructure of Type 316L Stainless Steel TIG Weld Metal

2011 ◽  
Vol 295-297 ◽  
pp. 1919-1924 ◽  
Author(s):  
Kuang Hung Tseng ◽  
Kai Chieh Hsien
Keyword(s):  
Stainless Steel ◽  
Weld Metal ◽  
316L Stainless Steel ◽  
Welding Process ◽  
Ferrite Content ◽  
Shielding Gas ◽  
Mixed Gas ◽  
Nitrogen Gas ◽  
Type 316L ◽  
Type 316L Stainless Steel

The aim of the present work was to investigate the effects of specific nitrogen gas additions to argon shielding gas on morphology and microstructure of austenitic stainless steel TIG welds. An autogenous TIG welding process was applied on type 316L stainless steel to produce a bead-on-plate weld. The ferrite content of weld metal was measured using a Feritscope. The results indicated that the arc voltage increase as the amount of nitrogen gas added to the argon atmosphere increases. The retained ferrite content of type 316L stainless steel TIG weld metal decreased rapidly as nitrogen gas addition to the argon shielding gas was increased.

Determining Keyhole Stability for Plasma Arc Welding Process Control

1999 ◽  
Author(s):  
Shaobin Zhang ◽  
YuMing Zhang
Keyword(s):  
Arc Welding ◽  
Imaging System ◽  
Welding Process ◽  
The State ◽  
Stability Factor ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Upper Limit ◽  
The Stability ◽  
Burn Through

Abstract Stability of the keyhole plays a fundamental role in producing quality welds in keyhole plasma arc welding. Currently, keyhole size is assumed to be a measurement of its stability. To verify this idea, keyhole and weld pool were simultaneously imaged from the opposite side of the welding torch. Experimental results revealed that the width of the keyhole was not correlative with the stability of the keyhole: as long as the keyhole mode was maintained, the width remained constant despite the changes in the welding current and speed. However, it can be used to estimate the lower limit of the pool width for preventing keyhole collapse. Also, the upper limit of the pool width for preventing burn-through is approximately fixed for given applications. Hence, in this study, pool width, its upper limit, and keyhole width were used to determine the margins of the process from collapse and burn-through. To measure the state of the stability of the keyhole process, the stability distance and stability factor were proposed. Based on the imaging system used, the state of the stability can be monitored in real-time.

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