Metal transfer in co2 welding, Mechanical Engineering


In CO2 welding, two distinct types of metal transfers are identified viz. short circuiting transfer and free flight globular transfer.

Short Circuit Transfer: When the welding voltage and the current are low, the mode of metal transfer would be of short circuiting type. In short circuiting mode, metal transfer occurs from tip of the wire electrode to the job whenever the wire tip touches the weld pool. The arc is extinguished during the short circuit period and is re-ignited after the short circuit is cleared. Short circuiting transfer is used for joining thin sheets, welding out of position and root pass welding of tubes and pipes.

Free Flight Transfer:  When the arc voltage and current are high, the metal droplets are transferred non axially as large globules and this is called non axial free flight transfer. The non axial free flight transfer produces deep penetration. Hence, this mode of transfer is used for welding thick sections in down hand and horizontal positions.

Posted Date: 9/17/2012 2:10:49 AM | Location : United States

Related Discussions:- Metal transfer in co2 welding, Assignment Help, Ask Question on Metal transfer in co2 welding, Get Answer, Expert's Help, Metal transfer in co2 welding Discussions

Write discussion on Metal transfer in co2 welding
Your posts are moderated
Related Questions
Q.   Explain the terms centre of gravity and centroid. Sol. : A point can be found out in a body through which resultant of all such parallel forces acts. This point through

Q. What is Squeeze time? It is the time between the initial application of the electrode pressure on the work and the initial application of current to make the weld. During th

Explain the Importance of Value engineering Improve your career skills Separate "Symptoms" from "problems" Solve "root cause" problems and capture opportunities

First law of thermodynamics applied to flow process

Nozzle: The pressure energy gets converted in to kinetic energy Mass flow rate  Turbine: It is used to generate work.  The work is done by system becaus

Write a MATLAB program to find the undamped natural frequencies and modes of an electric car treating it as a four degree of freedom system. Determine the undamped natural frequenc

What is euler operator Once a polyhedron model is available one might want to edit it by adding or deleting vertices, edges and faces to create a new polyhedron. These operatio

Determine the magnitude and nature of the stresses: A thin spherical hollow steel shell of 400 mm diameter & 5 mm thickness is immersed into a liquid container pressurized to

SIGNIFICANCE OF DEFECTS IN WELDS   In the correct sense of the word, a defect is a rejectable discontinuity or a flaw of rejectable nature. Certain flaws acceptable in one t

Q. What is Expansion Joints? Expansion joints are used to accommodate thermal growth in piping and pressure vessel applications. The metal bellows, an integral part of an expan