Laser Brazing – Precision Surface Enhancement with Minimal Heat Input

Laser brazing is an advanced process that uses laser energy to melt filler material onto a surface, creating strong, dense, and functional coatings.

It’s used for both building up new layers and restoring worn or damaged components – with high precision and minimal heat-affected zones.

How Does Laser Brazing Work?

Filler material is applied as powder or wire to the surface (substrate), where a high-power laser beam (CO₂, Nd:YAG, diode, or fiber laser) melts it to form a strong metallurgical bond.

Benefits include:

• 100% dense joints.
• Minimal dilution of the base material.
• Improved resistance to corrosion, wear, and fatigue.
• Tight dimensional control and minimal thermal distortion.

Key Advantages

Accurate and consistent coatings with little or no porosity

Minimal heat input, resulting in small HAZ and less distortion

Gradient coatings with varying material properties in real time

Shorter cycle times = higher production efficiency

Can restore worn parts to original dimensions without post-machining

Enhances resistance to corrosion, oxidation, and wear

Typical Applications

Aerospace components

Automotive body and powertrain parts

Marine and offshore industries

Oil & gas extraction equipment

Infrastructure and road construction

Component restoration and engine repair

Surface hardening of tools and wear parts

Compatible Materials

Carbon steel

Stainless steel

Titanium alloys

Nickel- and cobalt-based superalloys (e.g., Stellite®)

Carbide composites

Laser Brazing Systems

LMI AB partners with Preco, a leading manufacturer of standard and custom-configured laser brazing systems, including:

SL Series – modular systems for surfacing and brazing

ST Series – Class 1/Class 4 multi-axis systems for welding, drilling, and cutting

RT Series – robot-integrated systems for high-throughput production

Preco’s systems are based on fixed-beam laser technology combined with proven XY motion and control platforms.