2) In activated flux TIG welding, whichshortcoming of the conventional TIG weldingprocess is overcome?Low deposition rateLow heat inputShallow penetration depthO Tungsten inclusion

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Answered: 2) In activated flux TIG welding, which…

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter1: Introduction To Welding

Section: Chapter Questions

Problem 13R: How is a flux cored arc welding (FCAW) electrode wire different from a gas metal arc welding (GMAW)...

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Which SMA welding electrodes are commonly used to weld on sheet metal fabrications?
In short-circuiting transfer, what type of current alloys the liquid metal at the electrode tip to be transferred by direct contact with the molten weld pool?
How is a flux cored arc welding (FCAW) electrode wire different from a gas metal arc welding (GMAW) electrode wire?
What are the advantages of GMA welding?
What early advancements made the GTA welding process more effective and reduced its cost?
Why is usage of the term GWW preferable to MIG for gas metal arc welding?
What are the disadvantages of beveling plates for welding?
8) The electro-gas welding is different from electro-slag welding because in electro-gas welding Copper shoes are not used Heat is generated by electric arc Electrode used is of non-consumable type O Only thin sheets can be welded
2.8 Advantages of Submerged Arc Welding Cost per unit length of joint is relatively low The arc is under a blanket of flux, which virtually eliminates arc flash, spatter, and fume. • Extremely high deposition rates and welding speeds are possible. • Sound welds are readily made (with good process design and control). High current densities increase weld penetration and decrease the need for edge preparation. High speed welding of thin sheet steels at over 2.5 m/min is possible. Can be easily Automated Minimum welder training is required (relatively unskilled welders can be employed). • Low hydrogen weld deposits can be produced. • The flux acts as a scavenger and deoxidizer to remove contaminants such as oxygen, nitrogen, and sulphur from the molten weld pool. This helps to produce sound welds with excellent mechanical properties. 26 2.9 Limitations of Submerged Arc Welding Initial cost of wire feeder, power supply, controls, and flux-handling equipment is high. Limited to ferrous…
4) The primary issue in fusion welding of material having high coefficient of thermal expansion is O High energy requirement Wider heat affected zone Type-IV cracking High residual stress and distortion
8) The correct ways to control liquation cracking tendency in fusion weld joint are I. Use of filler metal that solidifies before the partially melted zone I. Use of single pass welding with higher net heat input instead of multipass welding III. Use of high energy density processes IV. Preheating the substrates V. Use of base metals with fine grain structure OI, II, and III II, and IV OII, IV, and V O II, III and IV
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