Laser marking machine in metal marking has become the norm, many metal semi-finished products, finished product processing plants have realized the efficiency of laser equipment. However, many products have certain technical requirements in the identification process, and there are certain requirements for the accuracy of the identification, the identification range, the font size, the color, etc., so everyone is more curious, can the laser marking machine mark black on the metal?

     What does laser marking machine mean by black? Laser blackening is the optical effect of a beam of high energy density on the surface of some metal products under the action of a special laser, and the material principle of the surface is further changed by using an oxide film of 5-20um thickness in an ultra-short time. Because the oxide particles are turned into nanoscale after laser treatment, the absorption line is larger, the reflected light is weaker, and then what we see with the naked eye becomes black.

     Laser marking machine how to play black on metal materials, under normal circumstances, many people choose to use fiber laser marking machine because of price factors, but Xiaobian would like to tell you that MOPA laser is more suitable for metal black processing. Metal blackening is generally for stainless steel, stainless steel black generally speaking, fiber laser marking machine can do.

     But for aluminum, the situation is different, aluminum can be played gray or black gray, but can not be played more black. Copper can not play too black, can play clear is very good. Alumina black laser marking machine and ordinary fiber laser equipment is not the same, this laser marking machine uses pulse width adjustable mode, can adjust the frequency to up to 400Khz, can directly play the aluminum black effect, magnesium aluminum, alumina, all kinds of aluminum are universal, the use is specially used in alumina black MOPA laser.

     Of course, in addition to black on the metal, the laser marking machine can also be colored on stainless steel, some metal white, gray, color is not only limited to black and natural color. Of course, these laser equipment need to adjust the parameters of the laser equipment when playing color, the parameters are very important, and the desired effect can not be achieved with a little carelessness.