Flux shielded arc welding, Mechanical Engineering

FLUX SHIELDED ARC WELDING


This process is popularly known as Submerged Arc Welding (SAW).This is a fully mechanised welding process. The electrode is a continuous metallic solid wire in the form of coil. It is fed automatically in to the arc at a constant speed. A layer of flux covers the arc. The power source used is generally a constant potential power source, transformer or a transformer - rectifier. It is of high capacity varying from 750 to 3000 amps. Since, the process employs such large currents, to protect the welder from arc heat, the arc is completely submerged in the layer of flux. Since the welder is fully comfortable, the process is successfully employed all over India.The welding head is mounted on a trolley, which travels along the joint. Alternately the welding head is stationary and the job is moved under it. The wire diameter varies  from 2.4 mm to  6.3 mm. The feed rate varies from 5 m / min to 15 m / min. The welding wire is always connected to positive polarity of the power supply. The wire can be solid cored or flux cored. The process gives very high productivity and  excellent weld quality. This process is ideal for heavy thickness. Generally used for welding boiler pipes, drums, cross country pipelines, offshore platforms and piping. It is  popularly used in fabrication of ships, plate girders, pressure vessels, pipes and penstocks, for welding, surfacing and strip cladding. In strip cladding wire is in the form of strips of size say 1.6 mm x 75 mm wide. To achieve better deposition rates out of this process, tandem welding with two or more torches are used.

Posted Date: 9/13/2012 5:32:18 AM | Location : United States







Related Discussions:- Flux shielded arc welding, Assignment Help, Ask Question on Flux shielded arc welding, Get Answer, Expert's Help, Flux shielded arc welding Discussions

Write discussion on Flux shielded arc welding
Your posts are moderated
Related Questions
Q. Flange Assembly with Bolt Tensioning? Measure the free length of the bolts ultrasonically. This must be done prior to applying any load to the bolt. Install bolts on the

Workplace Operations Requiring Safety The operations performed through workers in their workplace are of dissimilar nature but they involve a number of machine, equipment and

Rockwel l Hardness Test: The specimen is subjected to a major load for about 15 seconds after the initial load. ASTM says 13 scales for testing of wide range of materials. Th

Future Trends Ceramics and glasses contain wide ranging applications in domestic use and even wider application in manufacturing technology. The properties that are related wit

Determine the analytical solution for the maximum stress in the member shown. Submit screen shots that show the shape of the elements that result with a global element size of 0.15

Welding Process: There are many definition of a welding process. But the most comprehensive definition is below. Welding is defined as a "a localized coalescence of metals, wher

Q. Define Pattern draft or taper? It is also termed as "draw". It is the taper placed on the pattern surface that are parallel to the direction in which the pattern is withdraw

At a point in a rectangular block of elastic material under strain, there is a tensile stress of 50MPa on one plane and a compressive stress of 30 MPa on a plane at right angles. T

(i) Describe Poisson's Ratio. (ii) A circular rod of 100mm diameter and 500 mm length is subjected to a tensile force of 1000 KN. Calculate the modulus of bulk modulus, rigidity

please explain more about polygon of forces lab such as observation, theory and others.