Laser Welding Technology Advancements and Applications

　　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.In addition to domestic, laser machine manufacturers It has also emerged in the international field and gradually gained the favor of more foreign friends. 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.