Three-part tubes for drive shafts

Jansen produces weld-drawn tubes made of high-tensile materials for three-part drive shafts in automotive engineering. Tubes are welded to other components to form one unit. Consequently, there are stringent requirements to dimensional stability, roundness, end processing qualities and the materials' welding characteristics.  The tendency to light-weight design is increasingly demanding high-tensile materials. Newly developed air hardening steel materials are alternatively used.

Requirements

  • High strength values (elongation at break, tensile strength)
  • High torsional strength and durability
  • Excellent welding properties
  • High levels of geometrical accuracy (eccentricity, roundness)
  • Excellent surface-finish condition

Material properties

  • High torsional strength and fatigue strength
  • High strength
  • Homogeneous strength properties and ductility
  • Excellently suitable for welding
  • Potential to reduce wall thickness

Structure

  • Homogeneous, fine-grain structure (weld seam and basic material)
  • Minimised surface decarburisation of inner and outer surfaces (< 100 µm, < 50 µm)
  • Excellent weld seam quality

Geometry

  • Minimised fluctuations in wall thickness and inner/outer diameter
  • Minimised deviations in straightness
  • Minimised deviations in roundness and linear movement
  • Minimised eccentricity
  • Specific tube end processing: sawn/brushed; chamfered, completely processed/chamfered

Surface

  • Excellent surface condition thanks to tube drawing
  • Minimised surface irregularities (adhesions, scratches, dents, etc.)
  • Minimised corrosion protection, optionally specific corrosion protection
Three-part tubes for drive shafts