Friction welding

Friction welding

In this blog, we are going to learn about friction welding

What is friction welding?

Definition: It is a type of solid-state welding in which the joining of two metals is produced by heat generated through metal friction. The parts are held together under pressure.

Process Explanation: In friction welding one part is either rotating at high speed (circular shaft like job) or oscillating about its means position (square or other non-circular shape) under a pressure held against other part while other parts is held stationary. Due to high friction generation all friction energy is converted into heat. The surface is heated by this method till it reach its melting temperature when it reached its melting temperature the relative motion between the job is stopped. This complete the friction welding process.

Advantage of friction welding process:

1.       1.Low weld time

2.     2.Small heat affected zone compare to other conventional welding process

3.     3.Variety of metal and combination of metals can be welded by this method

4.     4.High quality of welding can be achieved by this method (google why nasa prefer friction welding for there jobs)

5.     5.Initial capital cost is low

6.    6. This process weld the whole surface contact in case of electric arc welding only peripheral welding is done but In this case whole surface is welded

7.     7.After welding further heat treatment might not required

Applications :high steel speed twist drills, engine valves , refrigerator tubes of dissimilar metals