Friction Welding
Joining of different materials

Friction Welding

Friction welding joins two materials together in a high-quality and durable way by means of pressure, friction and the resulting heat. Pressure and a relative movement between the contact surfaces of two bodies generates frictional heat. This frictional heat is used to join parts together in a high quality material bond.

The technology of friction welding is known for a safe and economical connection even of different materials.

Friction welding system and annealing system at Zipp Industries

Zipp Industries GmbH & Co. KG uses this process, among other things, to weld the threaded connectors to the drill pipe. Different lengths, different wall thicknesses and the right threaded connections determine the numerous designs of the drill pipes.

In addition, we offer friction welding for your individual welded connections as contract work. Our own friction welding facility gives us a high degree of flexibility in confirming delivery dates.

Advantages of friction welding

  • short welding time, very fast process
  • excellent welding quality
  • high quality and durable joints
  • clean production
  • good reproducibility
  • no filler metals
  • low material loss
  • optimum strength values in the weld seam
  • high quality standard due to good reproducibility of welding parameters by process monitoring
  • final inductive heat treatment of the weld seam

Delivery programme & service

  • Production of test pieces
  • Mechanical processing before and after welding
  • Series and individual production orders
  • Material procurement and processing up to the finished part
  • Advice on material selection
  • Optimisation of components and processes
  • Documentation of each weld

Tubes

  • Standard diameters from 51 mm to 177.8 mm
  • Lengths from 0.5 metres to 6.5 metres
  • Other lengths and diameters on request

A short video on the subject of friction welding

Set-up of the friction welding system at Zipp Industries

Joining dissimilar metals by friction welding

For joining dissimilar metals, we mainly use S355 (ST52) structural steel, which is easy to machine and has excellent weldability. The connectors are made of the material 1.7225 (42CrMo4). The alloy steel has high strength, high toughness, good hardenability as well as high fatigue strength.

As a rule, any forgeable metal can also be friction welded. Although copper-aluminium joints are generally considered to be non-weldable, it is possible to produce a long-lasting joint using the friction welding process. Machined, sawn or sheared surfaces can be joined by friction welding without extensive surface treatment.

Heat treatment with induction

To reduce stresses in the material caused by the friction welding process, we heat the already machined metal workpieces as well as the weld seams with our annealing equipment using induction.

Induction is a flameless, non-contact heating method that can anneal a defined area, such as the weld seam after friction welding, within seconds without touching the component.
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