Hardfacing Overlays

Improved wear-resistance

Hardfacing is a metalworking process in which a harder or tougher material is applied to a base metal to improve its wear performance and extend its service life. Usually this additive material is of a dissimilar alloy. Hardfacing can be applied to new parts during production or to restore a worn surface as part of a maintenance program.

Our equipment is capable of hardfacing a wide range of sizes, from large components for oil and gas exploration to very small machining collets.

Benefits

Laser hardfacing has become the preferred solution for parts that must withstand extreme wear conditions. Both laser hardfacing and corrosion-resistant coatings offer some significant advantages over more traditional methods of application such as SMAW, GMAW, SAW and PTAW.

  • Minimized dilution:
    Excessive dilution is usually counterproductive to the wear or corrosion performance of the clad layer. The LMD process can minimize dilution to the extent that full material properties of the clad can easily be realized in a coating as thin as 0.010” to 0.035”. This reduction in clad thickness not only results in less stress and distortion to the component, but also a significant reduction in filler material cost.

  • Rapid solidification of the weld pool:
    Since the laser’s heat input is very precise compared to the traditional methods mentioned above, the solidification rate of the weld pool can be very fast. This rapid solidification helps achieve finer grain structure of the coating. This commonly results in the coating hardness exceeding most of the expected norms. In the application of Cobalt 6 coatings, it is not unusual to achieve hardness levels of 54 Rc or more.