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What metallic materials are suitable for laser welding?

Source:HaiLeiRelease time:2016-05-27

1. Ordinary carbon steel and alloy steel laser welding. Overall, the good effect of laser welding of carbon steel, welding quality depends on the impurity content. Like other welding processes, like sulfur and phosphorus are sensitive to factors weld cracking. In order to obtain a satisfactory quality of welding, preheating required carbon content exceeds 0.25%. When different carbon content of steel welded to each other, the torch can be a little biased carbon material side, in order to ensure joint quality. Low carbon rimmed steel due to the high content of sulfur, phosphorus, and is not suitable for laser welding. Low carbon killed steel because of the low levels of impurities, the welding results are good. Medium and high carbon steel and ordinary steel can be well laser welding, but need to preheat and post-weld treatment to eliminate stress, avoid crack formation.
2. Stainless steel laser welding. Under normal circumstances, than conventional laser welding stainless steel welding easier access to quality joints. Due to the high speed welding heat affected zone is small, not-sensitized become an important issue. Compared with carbon steel, stainless steel, low thermal conductivity is easier to obtain narrow deep penetration welds.
3. The laser welding between different metals. Laser welding high cooling rate and a small heat-affected zone, after a number of different materials have different melting metal welding structural compatibility has created favorable conditions. It has been shown the following metals can be carried out smoothly laser penetration welding: stainless steel - mild steel, stainless steel 416 to 310 stainless steel, 347 stainless steel ~ HASTALLY nickel alloy, nickel electrodes - cold forged steel, nickel content of different bi-metal band.



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