Effect of parameters in flash butt welding, Mechanical Engineering

Effect of parameters in flash butt welding


Flashing Feed Rate: If excessive, there is a probability of the parts freezing together without welding. If this is insufficient, intermittent flashing will occur resulting in insufficient heating in the material.

Flashing Time
: If excessive, the material becomes too plastic to upset properly. If this time is less, the plasticity attained is not sufficient.

Flashing Current: If this is more than required, excessive flash is found in the weld : deep craters are formed causing pockets and inclusions in weld. If ot herwise, there is a tendency for the materials to freeze; lack of plasticity is also caused.

Upsetting Current: Too much of this parameter, causes burning or oxidation of the material even to the extent of blowing out metal. Excessive deformation also results. On the contrary, too less of upsetting current results in longitudinal cracking through weld area; inclusions and voids are not properly forced out of weld.

Upsetting Force: Excess of upsetting force causes the flow lines of the material to bend perpendicular to the welded job axis. As a consequence, poor weld results in. If upsetting force is inadequate, oxides, inclusions and voids can be found in the weld; cast metal may be retained in the weld.

Posted Date: 9/17/2012 4:14:27 AM | Location : United States







Related Discussions:- Effect of parameters in flash butt welding, Assignment Help, Ask Question on Effect of parameters in flash butt welding, Get Answer, Expert's Help, Effect of parameters in flash butt welding Discussions

Write discussion on Effect of parameters in flash butt welding
Your posts are moderated
Related Questions
Displacement or Swept Volume ( V s ) : The nominal volume swept by the working piston when travelling from one dead centre to the other is called the displacement volume. It is e

Define rpm

The press tressed bridge structure would look like as shown below,   The following factors influences the decision to select the particular prestressing, 1/Span of br

Give the assumption of pure torsion derivation of shear stress produced in circular shaft subjected to torsion

Evaluate the motion of the system: If in above Example, the block A is resting on an inclined plane at 45 o to horizontal as illustrative in Figure, find out the motion of th

Takt Time for sand blasting:             Tatk time is crucial in manufacturing process. It determines the speed of production to produce a product. Time is money toward prod

Q. What do you understand by Carburization? Carburization is initiated by the adsorption of carbon in contact with the surface of the metal and may progress by diffusion along

For Elevated Temperatures, Other Materials  High temperature creep is a significant phenomenon to be guarded in various machines like gas turbines, missiles, reentry vehicles a

(a) A circular cylinder of mass M and radius R connected by a spring of stiffness ‘K'. It is free to roll on horizontal surface without slipping. Calculate the natural frequency.

CONSTRUCTIO N and WORKING: The boiler barrel is cylindrical shell and consists of large number of flue tubes. The barrel comprise of a rectangular fire box at one end and a