Welding non-ferrous metal alloy materials is a major issue in the welding industry. The emergence of high-power fiber laser welding machines has effectively solved this problem. Next, let's take a look at four commonly used laser welding techniques for non-ferrous metals.

1. Firstly, let's take a look at laser welding of copper alloys. Copper alloys with higher thermal conductivity and reflectivity than aluminum alloys are generally difficult to perform laser welding. Laser welding can only successfully achieve laser welding of a few alloys such as phosphorus bronze and silicon bronze, provided that the laser power is high and the surface treatment enhances laser energy absorption.
2. Laser welding of aluminum alloys does not require filling of welding wires. Most aluminum alloys cannot be welded, and laser welding also has many difficulties. High thermal conductivity and reflectivity make it difficult to generate and maintain aluminum alloy molten pools, so maintaining welding molten pools and laser welding requires higher power density than welding other materials. For example, using a laser beam of approximately 10KW or higher power and a gas protection system, 5000 series aluminum magnesium alloys were successfully welded, exhibiting excellent seawater corrosion resistance. The material state also has an impact on laser welding. For example, laser welding of heat-treated aluminum alloys is more difficult than non heat-treated alloys. Sometimes, to prevent weld filling,

3. For laser welding of nickel alloys, laser can be well coupled with nickel alloys, making laser welding easy and obtaining high-quality joints. However, during the implementation process, attention should be paid to the hot crack sensitivity of HastalloyX and Kovar alloys.
4. Titanium alloy laser welding, laser is very suitable for alloys such as laser, and can obtain high-quality and good plasticity welding joints. But this material has high oxidation sensitivity and must be welded in an inert atmosphere. A typical titanium alloy TI-6A1-4V deep penetration welding study has shown that when welding 1mm alloy sheets with laser power above 3KW, high-speed and dense joints, without cracks, pores, and inclusions, can be obtained, and the joint performance is the same as that of the base material.