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Laser Marking Machine Can Produce Color Effect On Stainless Steel Surface
Aug 16, 2018

In recent years, with the rapid development of laser technology, the application level of laser technology has gradually improved, which has not only become an irreplaceable part of the current industrial production process, but also excellent performance characteristics are gradually leading the current processing and manufacturing to new The stairs. Laser marking is an important application direction for laser applications and plays a decisive role in today's marking processing.

The development of domestic laser marking has been developed from the beginning of the idling to the stage of stable development, and it is also widely used in China. At this time, in order to seek new growth points of business development, it has appeared in the expansion of stainless steel marking. The new process of stainless color marking has created another era of laser marking.

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Color marking is a recent laser marking process. When a metal material such as stainless steel, chrome or titanium is provided with controlled and precise heat injection by laser pulse irradiation, a colored oxide can be generated. Therefore, a laser can be used to make a certain color of a certain surface of the metal surface to obtain color. Logo. The study found that the key to colorization of metal surfaces is to strictly control the pulse energy and pulse width of the laser. High-frequency, low-pulse energy lasers are suitable for this application, and fiber lasers are the most suitable choice due to their adjustable pulse parameters and good beam quality. By strictly controlling heat injection, fiber lasers are capable of producing colorful logos on metal surfaces. When the laser pulse repetition frequency exceeds 125 kHz, the resulting color is deeper, and this repetition frequency is not achievable by other lasers.

Color laser marking machines differ from ink deposition techniques and those that apply color powders or films. More advanced lasers can change the typical physical effect of plastic color change with the thermal decomposition of polymers in an oxygen environment. In contrast, various colors can be produced on the surface of metal raw materials.

The principle of color development of stainless steel has three color development modes: one is to produce colored oxides; the other is to form a very thin colorless transparent oxide film on the surface of stainless steel by chemical, electrochemical or laser action, and the oxide film interferes. The effect can be displayed in the form of a color; the third is a mixed state of colored oxide and oxide film.

The corresponding relationship between the color change and the laser energy in the laser color marking of stainless steel, and the laser thermal effect generated by the stainless steel under the action of laser. Through the laser thermal effect, it is concluded that the laser energy density is proportional to the film thickness. As the laser energy increases, the color of the stainless steel surface changes in the following color order: orange-red-violet-blue-green-blue-blue-green-green-yellow-yellow-yellow-red.

You can edit all kinds of text patterns as you like, very convenient and easy to operate: absolutely environmentally friendly, no pollution; fast marking speed, for the stainless steel products industry, the application of color laser marking can add the color of the marking pattern, can greatly enhance the stainless steel products Product added value, enhance the international competitiveness of domestic