Laser Heat Treating

Precise Surface Modification
Laser Heat Treating Gear

Heat Treating with a Laser

Laser heat treating is a surface modification process designed to change the microstructure of metals through controlled heating and cooling. Lasers offer an advantage in this process in the ability to heat treat localized areas without affecting the entire workpiece. During heat treating, the mass of the material being processed is generally sufficient for "self-quenching" for heat removal. One example of an ideal application of this technology is heat treating hand tools. No post-machining is needed in most situations.


  • Hand tool cutting edges and jaws
  • Bearing journals
  • Thrust faces on gears
  • Sealing surfaces
  • Cylinders
  • Camshafts
  • Bending and forming dies
  • Cutting tools
  • Sliding wear surfaces
  • Gear teeth 

Efficient and effective.

The enhanced mechanical properties resulting from laser heat treating depend upon the specific composition of the metal or alloy. For example, laser case-hardening of transformation-hardening metals provides high hardness and wear resistance with minimum distortion. In addition, laser spot annealing of precipitation and work-hardened metals (i.e., aluminum alloys and 300 series stainless steels) restores ductility and improves formability in critical areas.

Laser heat treating large metal parts

Diode, Disk and Fiber lasers are commonly used for laser heat treating. These modern lasers have inherently high absorption properties allowing ease of use at a lower cost. 


  • Industrial 
  • Agriculture 
  • Automotive
  • Aerospace
  • Construction Equipment
  • Consumer Products


Some of the many advantages of Laser Heat Treating with a Preco-made machine.

  • Precision control of heat input to localized areas
  • Repeatability
  • Time-efficient process
  • Minimal distortion 
  • Minimal residual stress input
  • Self-quenching process; generally requiring no quenching medium
  • Hard-to-reach areas can be treated if line-of-sight exists
  • Internal Diameter (ID) capable 
  • Maximum hardness achieved
  • Single part flow
  • Digital/CNC process
  • Closed loop feedback

Metals Laser Processing Equipment


ST Series

Multi-Axis Laser Processing Machines

These workstations are designed for multi-axis laser welding, heat treating, cladding, drilling and cutting of metallic components.


SL Series

Multi-Purpose Laser Processing Machine

The SL Series is manufactured from standard parts and integrated into a single workstation designed to fit specific customer needs.