Electron beam welding, Other Engineering

Assignment Help:

The experimental set-up of Electron-beam welding.

In the electron-beam process, electrons are emitted from the heated filament called the cathode and then focused into a beam which is directed at the welding point. This electron beam is accelerated by a high difference of potential voltage between the work-piece and the cathode filament. The cathode within the electron-beam gun releases the electrons, which travel through a series of focusing lenses, causing the electrons to converge on one another to form the beam. The electrons are not free flowing but are instead greatly accelerated by the tremendous difference of potential voltage between the cathode and anode. The speed of these accelerated particles range from 30,000 to 1,20,000 miles/sec, depending upon the voltage of the unit.

          When the beam strikes the welding point, the kinetic energy of the high-speed electrons is converted into heat. The heat is great enough to melt and fuse the metal. The greater the kinetic energy, the greater the amount of heat released and by this energy the welding process is completed.

Ans.(b) The soldering is a method of joining similar or dissimilar metals by means of a filler metal (called solder) which melts at a relatively low temperature i.e. less than 427ºC. Although soldering is done below 427ºC generally the solde3rs used have a melting point between 180ºC to 270ºC.


Related Discussions:- Electron beam welding

Control surface effectiveness and reversal, Control Surface Effectiveness a...

Control Surface Effectiveness and Reversal To discuss the effectiveness and loss of a control surface, we allow a rigid rotation δ of the flap set by a flight control system (o

DSP, bit reversed process 10 point dft

bit reversed process 10 point dft

Importance of capital budgeting decision, The study is conducted to know th...

The study is conducted to know the importance of capital budgeting decision and the techniques to evaluate the investment projects. There are a variety of discounted and non-disco

Electrical de-icing system maintenance, ELECTRICAL DE-ICING SYSTEM MAINTENA...

ELECTRICAL DE-ICING SYSTEM MAINTENANCE: Tests of the system must be carried out when the servicing schedule required it or when a component has been replaced.  Typical tests ar

Cash Flows Components, A typical investment will have three components of c...

A typical investment will have three components of cash flows: • Initial investment • Annual net cash flows • Terminal cash flows. Initial investment Initial investme

Fire evacuation - railway inspections, Fire evacuation - Railway inspection...

Fire evacuation - Railway inspections: Fire evacuation signals should be given by voice messages and these must be easily understood by the occupants. The expected populati

Comparison of fp result with other metods, Comparison of  fp result with o...

Comparison of  fp result with other metods Comparisons of FP results with results from other computational methods for inviscid flows are given. The FP results have been obtain

Crystal structure, how can we determine the crystal structure of material b...

how can we determine the crystal structure of material by having interplanar spacing d?

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