Mastering Friction Welding: Techniques, Benefits, and Applications

Friction welding is a special welding process, perform in a different manner to obtain a joint. In my previous article, i enlightened on different types of welding processes and explained welding as a process by which two-parts are joined together. Today you’ll get to know the definition, applications, working, advantages and disadvantages of friction welding process.

What is friction welding?

Friction welding is a solid-state welding process that generate heat through mechanical friction between the workpieces in relative motion with one another. The addition of literal forces helps in joining the part.

Friction welding process is totally different from fusion welding but more of forge welding which is because no melting occurs. The joint is obtained because of the thermomechanical treatment at the contact surface.

In a friction welding, the workpiece is joined either relative to each other or by rotating in order to produce friction and displaces the material plastically on the surface. Very high pressure is needed here to accomplish the weld.

As earlier mentioned, in the working of friction welding, heat is generated at the melting part of the workpiece so that it can fuse (weld) when external pressure is applied. The friction takes place between the parts until it turns plastic, normally at 900-1300 centigrade of steel. At this point, a uniformly increasing pressure force is applied to the workpiece and a permanent joint is obtained.

Watch the video below to learn the working of friction welding process:

Applications of friction welding:

The applications of friction welding process is vast when it comes to item production. This is to say friction is used in welding tubes and shafts. it is widely also used in aerospace, marine, oil, and automobile industry to joint machine parts. It is also applicable in components where friction welding is needed, items like gears, axle tube, driveline, valves, etc. The applications of friction welding is also used to join hydraulic piston rod, truck rollers bushes, etc. it is used to weld drill bits, connecting rod, gear levers, etc. Finally, Friction welding processes are widely used in electrical industries for welding copper and aluminum equipment.

Advantages and disadvantages of friction welding

Advantages:

The following stated below are the benefits of friction welding process in their various applications:

Now you can see that this type of welding is applicable to different fields and can be to weld different items. This is because it helps in reducing grain growth in engineering materials such as high-strength heat-treatment steel. And because no melting is involved.  Dissimilar materials can be joined In this type of welding. That is why it is applicable in aerospace, where lightweight materials like aluminum and high strength are to be joined.

Another advantage is that the weld surface is cleaned due to the motion between the materials that are joined and full strength is obtained in joint with no additional weight to the workpiece.

Friction welding is also used with thermoplastics materials. It uses very low heat and pressure on the materials. This is why friction welding can be used to join metals to plastics with the metal interface being machined.

Disadvantages:

Despite the excellent benefits of friction welding process, some limitations still occur. Below are the disadvantages of friction welding in their various applications:

• It is environmentally friendly process. That is, the welding operation can be performed anywhere as it generates no smoke, flame, light, etc.
• No filler material is required.
• The welding process is fast.
• It is easily automated.

• Friction welding equipment is of high cost.
• Materials that cannot be forged won’t weld. finally,
• One of the greatest disadvantages of friction welding is that it has limitations to workpiece dimensions. In the sense that round bars with similar cross-section are restricted, joint designs are limited and the workpieces need to be fixed.

That is all for this articles, where the definition, applications, working, advantages and disadvantages of friction welding process is discussed. I hope you get enough from this post, if so, kindly share with other students. Thanks for reading, see you next time!