Suitable for laser welding
The materials suitable for laser welding are as follows:
1. Die steel.
S136, SKD-11, NAK80, 8407, 718, 738, H13, P20, W302, 2344 and other welding effects are better.
2. Laser welding of carbon steel and common alloy steel.
In general, carbon steel laser welding has a good effect, and its welding quality depends on the impurity content. Like other welding processes, sulfur and phosphorus are sensitive factors in the production of weld cracks. In order to obtain a satisfactory weld quality, preheating is required when the carbon content exceeds 0.25%. When steels with different carbon contents are welded to each other, the torch can be slightly biased to the side of the low carbon material to ensure joint quality. Low carbon boiling steel is not suitable for laser welding due to its high sulfur and phosphorus content. Low carbon killed steel has good welding results due to low impurity content. Medium and high carbon steels and common alloy steels can perform good laser welding, but require preheating and post-weld treatment to eliminate stress and avoid crack formation.
3. Laser welding of stainless steel. In general, stainless steel laser welding is easier to obtain a quality joint than conventional welding. Sensitization does not become an important issue due to the high heat transfer zone of the welding speed. Compared to carbon steel, the low thermal conductivity of stainless steel makes it easier to obtain deep-welded welds.
4. Laser welding between different steels.
The extremely high cooling rate of laser welding and the small heat-affected zone create favorable conditions for the compatibility of materials with different structures after many different metal welds are melted. It has been proved that the following metals can be smoothly laser deep-welded: stainless steel ~ low carbon steel, 416 stainless steel ~ 310 stainless steel, 347 stainless steel ~ HASTALLY nickel alloy, nickel electrode ~ cold forged steel, bimetallic strip with different nickel content.
5. Welding of various metals such as titanium, nickel, tin, copper, aluminum, chromium, bismuth, gold, silver, etc., and alloys of the same materials such as steel and kovar.
Non-ferrous metals are relatively difficult to weld, and their copper alloys and silver alloys are the most difficult to weld.
6. It is used for welding between various dissimilar metals such as copper-nickel, nickel-titanium, copper-titanium, titanium-molybdenum, brass-copper, low carbon steel-copper.
Degree of difficulty | stainless steel | Die steel | Carbon steel | alloy steel | nickel | Zinc | aluminum | gold | silver | copper |
| stainless steel | easy | |||||||||
| Die steel | easy | easy | ||||||||
| Carbon steel | easy | easy | easy | |||||||
| alloy steel | easy | easy | easy | easy | ||||||
| nickel | easy | easy | easy | easy | easy | |||||
| Zinc | easy | easy | easy | easy | easy | easy | ||||
| aluminum | Slightly difficult | Slightly difficult | Slightly difficult | Slightly difficult | Slightly difficult | Slightly difficult | Easier | |||
| gold | difficult | difficult | difficult | difficult | difficult | difficult | difficult | Slightly difficult | ||
| silver | difficult | difficult | difficult | difficult | difficult | difficult | difficult | difficult | difficult | |
| copper | difficult | difficult | difficult | difficult | difficult | difficult | difficult | difficult | difficult | difficult |
The above is for reference only, the metal and alloy composition are different, which has a great influence on the welding, so the actual test shall prevail.
The effect of plating on laser welding:
Gaoping mirror coating is difficult to weld: Mirror chrome plating, silver plating, silver plating and other general coatings are easy to weld: nickel plating, galvanizing, copper plating have no effect on welding strength. Highly polished metal is difficult to weld: copper, silver and gold are more welded. Small other processing is easy to weld: as long as it is not mirror-welded
Effect of gap on laser welding:
The smaller the seam, the better the appearance, the greater the strength, and when the seam is large, a more serious groove-like weld is formed, and the strength is also small.
The effect of material thickness on laser welding:
For materials below 0.2, the welding is difficult, the welded joints are deformed, and the welding firmness is reduced. Thicker material, good solder appearance and high strength.
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