Laser welding machine, also known as laser welding machine and laser welding machine, is a machine for laser material processing. Laser welding uses high-energy laser pulses to locally heat materials in a small area, and the energy of laser radiation is transmitted to the material through heat. Internal diffusion, the material is melted to form a specific molten pool to achieve the purpose of welding. At present, there are countless laser welding machines on the market, but in fact, its core technology is similar, but the quality is uneven. Laser welding machine manufacturers must take the road of independent research and innovation in order to remain invincible in the fierce market competition
The welding machine produced has its own advantages and characteristics. It must meet the needs of scientific and technological development, and cannot blindly follow the path of imitation and copying. The innovation of laser welding itself is a must, especially when independent innovation leads to continuous impetus for the development of the industry,
The laser welding machine is a non-contact welding method. By focusing the light, the energy of the light can be maximized at the focus to achieve welding and molten pool. Because different materials absorb light differently; material thickness is different. Steel material is a widely used material in contemporary industry, and the application of laser welding technology in steel material is relatively mature. But there are still big differences when laser welding different steel materials.
Laser welding of carbon steel and ordinary alloy steel: In most cases, the laser welding effect of carbon steel is good, and the welding quality depends on the impurity content. Like other welding processes, sulphur and phosphorus are sensitive factors for weld cracking. Overall, stainless steel laser welding is easier to obtain quality joints than conventional welding. Due to the small heat affected zone at high welding speeds, sensitization is not a significant issue. Compared with carbon steel, the low thermal conductivity of stainless steel makes it easier to obtain deep penetration and narrow welds.
In order to obtain satisfactory welding quality, preheating is required when the carbon content exceeds 0.25%. When welding steels with different carbon content to each other, the welding torch can be slightly biased to the side of the low carbon material to ensure the quality of the joint. Low carbon boiling steel is not suitable for laser welding due to its high content of sulfur and phosphorus. Low carbon killed steel welds very well due to its low impurity content. Both medium and high carbon steels and common alloy steels can be laser welded well, but require preheating and post-weld treatment to relieve stress and avoid crack formation.
