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

Heat transfer.., Ask question #Minimum 100 woHeat generated uniformly in St...

Ask question #Minimum 100 woHeat generated uniformly in Stainless steel plate having k=20 W/m.0C. The thickness of the plate is 1cm and the heat generation rate is 500 MW/m3. If th

Steps involved for method of section, Step s Involved for Method of Sectio...

Step s Involved for Method of Section: The different steps involved are stated below: (1) First find out support reaction by using equilibrium conditions. (2) The truss

Convection internal flows, #queConsider laminar flow in a circular tubewith...

#queConsider laminar flow in a circular tubewith a fully developed velocity profile.Let the heat be added at a constant rate along the tube from x+ =0 to x+ =0.10 . Thereafter ,

Calculate the maximum shear stress, The square cross sections A and B a...

The square cross sections A and B are shown in Fig Q1, the dimensions b = 80 mm, thickness t = 10 mm. A shear force V is applied at the cross section, calculate the maximum she

Example of manufacturing lead time (mlt), Example of Manufacturing Lead Tim...

Example of Manufacturing Lead Time (MLT) A certain part is generated in a batch size of 100 units. The batch should be routed through five operations to complete the processin

Opportunity cost, whats the example of opportunity cost?

whats the example of opportunity cost?

Design a control chart and control limit for the process, a) Describe Quali...

a) Describe Quality. What are various quality measures. b) A steel chairs manufacturer is also the quality inspector in his manufacturing unit this parameter of a chair being de

Mockup of tube to tubesheet, what are the tests to carried out after mockup...

what are the tests to carried out after mockup preparation

Explain screw conveyor, Screw conveyor Screw conveyor during mixing an...

Screw conveyor Screw conveyor during mixing and flow directing paddles are selectively adjustable for use on a wide variety of materials having dissimilar flow characteristics

Compute the maximum efficiency of the solar cell, The main objective is to ...

The main objective is to compute the maximum efficiency of the solar cell panels, produce hydrogen and estimate the hydrogen production rate using solar cells and electrolyzer and

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