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

Re-heat nozzles in aircraft engine, Re-Heat Nozzles : If re-heat was fi...

Re-Heat Nozzles : If re-heat was fitted to an engine with a standard sized fixed area propelling nozzle, the expansion of gases caused by the use of re-heat would increase the

Full-authority digital electronic control, Full-authority digital electroni...

Full-authority digital electronic control: The supervisory control was a step toward the full-authority, fully redundant EEC. It controls all engine functions and eliminates th

Core sand, Q.27 Explain the desirable characteristics of core sand. What ar...

Q.27 Explain the desirable characteristics of core sand. What are the normal binders used in core sand ? Types of cores used in foundry. Ans. Core Sand : The core and ma

Digital electronics, i got a msg from u is that Dear Tutor ...

i got a msg from u is that Dear Tutor Congratulations!! You are successfully done with the process of quality check, now we are sending you the registration form

Tool life, hi I''m doing research in tool life of solid carbide endmills ...

hi I''m doing research in tool life of solid carbide endmills and I was looking at your formulas. I was wondering if tell me or where I can find the data required for these formu

The oil pressure indicator - aircraft engine, The oil pressure indicator : ...

The oil pressure indicator : The oil pressure indicator has a dial normally calibrated in pounds per square inch (psi). The indicator may have max. limit markers, but will alw

Human Motion Kinetics, Beginning from rest when theta=10 degrees, a 30-kg c...

Beginning from rest when theta=10 degrees, a 30-kg child slides without kinetic friction down the slide which is in the shape of a 2.5 meter circular arc. Determine the child''s sp

Quality engineering and management, Describe the principle parts of a quali...

Describe the principle parts of a quality function deployment matrix

Auto cad, Do you provide help with Autocad assignments?

Do you provide help with Autocad assignments?

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