Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
TUNGSTEN INERT GAS WELDING (TIG)
In this process, an arc is struck between a non consumable tungsten electrode and the base metal. The tungsten electrode is called non consumable electrode as it melts only at around 2800 ° C and in the arc heat, any other metal melts at lower temperatures. The TIG arc is shielded by inert gases like argon, helium or a mixture of both. A filler wire may or may not be used. AC power supply is used for aluminium alloys and DC for all other metals. Normally, when an arc is struck between an anode and cathode, more heat is observed at the anode and less heat at the cathode. Hence, in TIG welding the tungsten electrode is always connected to the negative polarity of the power source so that the electrode does not melt. Since, the tungsten has high melting point, it is brittle and breaks easily. Hence, generally the electrode is not touched with the plate to strike arc but a High Frequency (HF) unit is used to initiate the arc. The HF unit is actually a high voltage, high frequency unit that generates around 3 kV voltage and 3 MHz frequency which ionises the gap between the electrode and the plate thus enabling the arc to jump from the electrode to the plate. This is an ideal process for welding of non-ferrous metals and stainless steel in limited thickness. It is used for root pass in pressure vessels where welding from inside is not possible.
Q. Show Prevailing wind conditions for plant layout? Prevailing wind conditions influence the design considerations for the location of the flare or vent stack. It is vital tha
full detail of jet pump nozzle design
Define and classified parallel forces Sol.: The forces, the lines of action of which are parallel to each other, are called as parallel forces. They do not meet at one point
what is dry ness fraction?
Effect of Individual Alloying Elements: Sulfur Sulfur is not a needed element in steel since in interferes along with hot rolling and forging resulting in hot-shortness
Illustrate the following : a. Ash handling system b. Dust collection What are the impurities in the water and how they are replaced for use as feed water in modern thermal
Q. Functions of geometric modeling? Design Analysis • Evaluation of area, volume, mass and inertia properties. • Interference checking in assemblies. • Analysis of
Determine the reaction at specific points: A light rod AD can be supported by frictionless pegs at B and C and rests against frictionless wall at A as shown in th
Case study entitled " Exxon Valdez Oil Spill Disaster ". 1. Examine the aim and objectives of Exxon Mobil Corporation. 2. Carefully observe the oil and refinery ind
Q. Design Control Room for plant? Some equipment may need to be located inside buildings, but this needs to be justified as it incurs additional cost and can create additional
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd