Laser welding technology has evolved significantly with advancements in laser technology. New light sources！such as blue lasers, green lasers, femtosecond lasers, and adjustable ring mode (ARM) lasers！have introduced innovative welding processes, enhancing industrial applications.The data shows that, laser marker Its development potential should not be underestimated, and it is also the inevitability of its existence. http://laserscheme.com/
Metal Laser Welding Challenges
The high energy density of lasers enables the welding of challenging metal materials. However, issues persist, particularly with highly reflective metals like gold, silver, copper, and aluminum, as well as dissimilar metal combinations. Key challenges include:
High Reflectivity and Thermal Conductivity: These metals require higher starting laser power.
Surface Sensitivity: Variations in surface state can lead to poor weld formation.
Rapid Welding Speed: This can create defects like pores, especially in aluminum and its alloys.
Efficient Laser Welding of Copper and Alloys
Copper¨s excellent electrical and thermal conductivity makes it essential in electronics and electric vehicles (e.g., motors, batteries, and sensors). Traditional infrared lasers struggle with copper due to its high thermal conductivity and low absorption rates.
Advanced Laser Solutions
Green Laser Welding
Wavelength: 500-560 nm (peak absorption at 515 nm)
Benefits:
High absorption rate (40% vs. ~5% for infrared)
Improved energy coupling and less sensitivity to surface oxidation
Reduced spatter and consistent weld quality, less affected by speed.
Blue Laser Welding
Wavelength: 400-500 nm
Advantages:
Increased photon energy enhances absorption by 10-60% for reflective metals.
Lower energy requirements: welding copper with blue lasers can consume 84% less power compared to infrared lasers.
Dual-Beam Composite Welding
Combines low-power visible light lasers with infrared lasers.
Enables deep melting welding with reduced power and minimized spatter, offering a cost-effective solution with high-quality outcomes.
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Conclusion
The integration of advanced laser technologies such as green and blue lasers, along with dual-beam processes, is transforming the landscape of metal welding, particularly for challenging materials like copper. These innovations not only enhance welding efficiency but also broaden the application scope in various industrial sectors.