Electron beam welding, Other Engineering

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.

Posted Date: 8/3/2012 6:09:19 AM | Location : United States







Related Discussions:- Electron beam welding, Assignment Help, Ask Question on Electron beam welding, Get Answer, Expert's Help, Electron beam welding Discussions

Write discussion on Electron beam welding
Your posts are moderated
Related Questions
a circular roller of radius 10cm and of weight 1.8kn rest on a smooth horizontal surface

NOR Gate: Figure shows a further example of a 2 input digital gate, again consisting of two NPN transistors, TR1 and TR2, in a different configuration. When input A and input

Blanking involves cutting of the sheet metal along a closed outline in a single step to separate the piece from the surrounding stock. As shown in figure, the path that is cut out

main difference between warping and without warping

Adders & Subtractors Adder and Subtractor circuits are used to perform basic calculations in computer systems. Adders, as their name suggests, add binary digits. Since binary

Expertsmind.com offers  Cell Arrays matlab assignment help In matlab, Cell arrays are just like frequent arrays in that they are "indexed" details of information, with an out

Direct probe,isolation probe,high impedence probe,active probe,current probe

A concrete block manufacturer operates a natural gas-fired furnace-type curing kiln (rated at 20 Mbtu/hr) and consumes 820, 000, 000 cubic meters of fuel annually.  Being similar t

Q. 1 A 50 cm diameter pipeline in the Arctic Carries hot oil at 30 0C and exposed to a coefficient surrounding temperature of -20 0C. Special powder insulation 5 cm thick surround

Apu starting sequence in aircraft : In figure the APU control unit receives its power from the aircraft battery. By moving the APU switch to ‘ON', power is provided to the i