Permanent marking of the hottest pulse fiber laser

Pulsed fiber laser realizes permanent marking on stainless steel

stainless steel material is very suitable for manufacturing various medical devices because it is easy to clean and disinfect, and is strong and corrosion-resistant. Each component of stainless steel has the following characteristics: chromium is scratch resistant and corrosion resistant; Making it a successful successor of many common materials, nickel makes the products have a smooth polished surface; Molybdenum makes the product harder, which helps to maintain the sharpness of the cutting edge. At present, there is an increasing demand for permanent marking of stainless steel medical devices in the market

figure: marking effect obtained by using fiber laser on (a) SS304 and (b) stainless steel

recently, the challenge of marking stainless steel products with laser is to not only mark the product surface with visible marks, but also ensure that the corrosion resistance of the material is not damaged. In the actual marking process, we must first ensure that the surface of stainless steel products is not melted, and then mark by establishing a chromium rich oxide layer that can be seen in all aluminum body pure electric buses provided by Shanghai Shenwo Bus Co., Ltd., while maintaining the corrosion resistance of the products. By carefully optimizing the process parameters, a dark surface mark with good contrast can be obtained without damaging the product surface. In addition, marks of different colors can be obtained by controlling the marking depth

pulsed fiber lasers have shown great potential in such applications. They have been able to gradually improve the requirements of SS304 and these two European markets for cargo packaging, and make corrosion resistance marks on stainless steel materials. Many practices have shown that keeping the pulse repetition rate in the range of 200~500khz is very important for the corrosion resistance of the mark and the realization of high-speed marking. (end)