Effect of parameters in flash butt welding, Mechanical Engineering

Assignment Help:

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.


Related Discussions:- Effect of parameters in flash butt welding

Laser welding applications with low power, Laser Welding Applications with ...

Laser Welding Applications with Low Power   For a lap weld joining of AISI 416 stainless steel cap to a AISI 310 stainless steel body, CO 2 Laser with a 575 watts beam out

High resistance or low current in primary coil circuit, If High Resistance ...

If High Resistance or Low Current in Primary Coil Circuit Causes of Problem Remedy   Disconnected or loose wires

Plate oil separator, Plate oil Separator: Check for plate oil separator fi...

Plate oil Separator: Check for plate oil separator fitment.

Explain the methods of solid modeling, Explain the Methods of solid modelin...

Explain the Methods of solid modeling The various methods for representing the solids are : (i)  Half-space method (ii)  Boundary representation method (b-rep) (iii)

Explain how the rankine cycle efficiency is improved, Illustrate how the Ra...

Illustrate how the Rankine cycle efficiency is improved by the following : a. Lowering the condenser pressure. b. Increasing the pressure of steam. c. Superheating the ste

Rotary converters, ROTARY CONVERTERS Historically, these type of power so...

ROTARY CONVERTERS Historically, these type of power sources were developed first for arc welding applications and even now these types are popular. These rotary converters are of

Explain the adiabatic system - thermodynamic, Explain the Adiabatic System ...

Explain the Adiabatic System - Thermodynamic Adiabatic System: A system along with adiabatic walls can just only exchange work and not heat with the surrounding is known as Adi

Find out the final extension and the work done, Find out the final extensio...

Find out the final extension and the work done: Problem:  (i) A spring of stiffness 4 N/cm of extension is extended steadily yet the force of 20 N is reached. Find out th

Explain design factors influencing cost of a print project, Problem: (a...

Problem: (a) What is the best paper to use when printing metallic inks? Explain your answer. (b) A multiple page printed document such as a book, brochure or booklet needs f

Open pair?, Which of the following is an open pair?

Which of the following is an open pair?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd