Laser brazing is an advanced joining process that uses laser energy to melt a filler material, creating strong and dense joints without melting the base material.
Laser Brazing – precision joining with controlled heat input
Laser brazing is a modern joining process in which laser energy melts a filler material that bonds two components together. Unlike laser welding, the base material is not melted, resulting in a stable joint with minimal heat input.
The process is commonly used in applications where high surface quality, tight joints, and minimal distortion are required.
How Laser Brazing Works
In laser brazing, filler material is typically delivered as wire or powder to the joint between components. A high-energy laser beam – such as a CO₂, Nd:YAG, diode, or fiber laser – melts the filler material, which then flows into the joint by capillary action.
Because the base material remains solid, the process creates a metallurgical bond with minimal thermal impact.
The result includes:
-
Dense and strong joints
-
Minimal dilution of the base material
-
Low porosity
-
Very small heat-affected zone (HAZ)
-
Excellent dimensional control
Key Advantages
Laser brazing offers several advantages compared to conventional joining methods:
-
Precise and stable process control
-
Minimal heat input and low distortion
-
High repeatability in production
-
Shorter cycle times and improved productivity
-
High-quality surface finish
-
Improved resistance to corrosion and fatigue
Typical Applications
Laser brazing is widely used in industries such as:
-
Aerospace manufacturing
-
Automotive body and structural components
-
Marine and offshore industries
-
Oil and gas equipment
-
Infrastructure and construction
-
Component repair and restoration
-
Tools and wear parts
Compatible Materials
Laser brazing can be used with various materials, including:
-
Carbon steels
-
Stainless steels
-
Titanium alloys
-
Nickel- and cobalt-based alloys (e.g., Stellite®)
-
Carbide composites
Laser Brazing Systems
LMI AB partners with Preco, a leading manufacturer of standard and custom laser processing systems.
Preco offers several system platforms:
SL Series – modular systems for brazing and surface processing
ST Series – Class 1/Class 4 multi-axis workstations for welding, drilling, and cutting
RT Series – robot-integrated systems for automated production
Preco’s systems combine fixed-beam laser technology with proven XY motion and control platforms, ensuring stable and precise laser processing.
