sometimes the laser beam self-focusing phenomenon

green laser pointer can be commissioned and adjusted for the customer
Wavelength 10.6μm CO2 laser welding of the absorption rate of two orders of magnitude higher than the absorption of the YAG laser wavelength of 1.06μm. Absorption rate, the different wavelengths

of laser-produced plasma power density required threshold. YAG laser-produced plasma threshold power density is about two orders of magnitude higher than the CO2 laser. In other words, the CO2

laser processing, easy to produce plasma and its impact, while a smaller impact of YAG laser processing, plasma. Laser beam through the plasma, the change of the absorption and focusing conditions,

sometimes the laser beam self-focusing phenomenon. Plasma absorption of light can be transmitted through different channels to the workpiece. The high performance laser module of green laser pointer is also critical to the quality.
Wall focusing effect generated allows the laser to maintain a high power density within the hole, and further heating the melt material. Important for the laser welding process, the laser power

density in the remaining holes at the bottom of it must be high enough to maintain the bottom of the hole high enough temperature to produce the necessary vapor pressure to maintain a certain depth

of the hole. Focusing effect appears to generation and wall of the pinhole effect, can dramatically change the process of laser interaction with matter, when the beam to enter the holes, the holes

is equivalent to a light absorbing black body, and greatly increase the energy absorption rate. Purifying effect of purifying effect of the CO2 laser welding, the weld metal of harmful substances

reduced or mixed with the material to reduce the phenomenon.
Defocus amount of welding quality. Laser welding is usually away from the fuss about because of the high power density of the laser focus at the spot center, easily evaporate into the hole. Leaving

the laser focus plane, the power density distribution is relatively uniform. Defocused mode in two ways: positive and negative defocus defocus. Focal plane at the top of the of the workpiece being

away from the focus, and vice versa for negative defocus. According to the theory of geometrical optics, when positive and negative away from the focal plane with the welding plane equidistant,

corresponding to approximately the same power density on the plane, but the weld pool shape actually. Negative defocus, the availability of greater penetration, which is related with the formation

of the molten pool. Solution heat treatment the steel is heated to 1050 to 1150 ℃, homogeneous single-phase austenite, and then rapid cooling and high-temperature supersaturated

solid solution state remains to room temperature.