Stainless steel material has excellent corrosion resistance, wear resistance, toughness and technology, widely used in construction, automobiles, anti-counterfeiting signs and other fields, has become a symbol of fashion and innovation. However, the traditional chemical coloring, electrochemical coloring and other methods in the preparation of colored stainless steel, often accompanied by high energy consumption, large pollution and difficult to achieve fine coloring problems. So, is there a more efficient and environmentally friendly solution? The answer is laser color marking! Laser color marking technology with its unique advantages of green, high efficiency, high flexibility and long-term retention, quickly emerged, favored by all walks of life. At present, Boyi laser can be customized according to different needs of customers to meet a variety of complex design requirements.

First, MOPA laser stainless steel color principle and application introduction

Stainless steel under the action of laser heat, the surface will generate colored oxides or generate a colorless transparent oxide film, due to the light film interference effect and show a variety of colors. The color effect produced by stainless steel is mainly due to the interference effect of the film. Figure 1 shows the principle diagram of thin film interference.

The high energy pulsed laser beam acts on the surface of stainless steel, generating a layer of translucent oxide film on the metal surface, when the light is shot into the oxide film at a certain Angle θ, part of the light is reflected in the air and the oxide layer of the contact surface to form direct reflected light, and the other part of the light refracts into the translucent oxide layer and then refracts into the air to form refracted light, and the original reflected light forms interference. Due to this interference phenomenon of light, some wavelengths of light are strengthened, and some wavelengths of light are cancelled, and different thickness of oxide films produce different colors.

The advantage of MOPA laser is that its pulse width and frequency are independently adjustable, and Boyi laser can precisely control the color change of the stainless steel surface by adjusting the parameters of the laser, such as power, frequency, pulse width and scanning speed, and obtain a series of patterns with different color effects. This is shown in Figures 2 and 3.

At present, this technology can be applied to the color pattern marking on stainless steel, chromium, titanium and other metal materials. For the stainless steel products industry, the color laser marking machine can not only increase the added value of the product, but also improve the beauty and personalization of the product, to meet the needs of consumers for diversified and personalized products.

Second, ultrafast laser dazzling principle and application introduction

With the current demand for multi-element visual and artistic appearance, laser dazzling process came into being, which is a colorful and non-corrosive marking process, is a good supplement to the existing laser marking process.

Ultrafast laser dazzle technique is to use high energy and narrow pulse width ultrafast laser to form nanoscale laser induced periodic fringe microstructure on metal surface, which has the characteristics and properties of reflective grating. When white light is shone on these stripes, the light diffracted between the different stripes, that is, the phenomenon of light bending and dispersing as it passes through gaps or obstacles of different sizes. Diffracted light from different stripes interferes with each other, and the result of the interference depends on the wavelength of the light and the spacing of the stripes. Because different wavelengths of light (that is, different colors of light) appear in different directions at the time of interference, white light (composed of a variety of wavelengths of light) will be dispersed into a spectrum after passing through such a reflection grating. This means that different wavelengths of light are scattered in different directions, creating a visually colored pattern.

Ultrafine laser Color technology not only creates colorful visual effects on metal surfaces, but also achieves extremely high color resolution and clarity due to its nanoscale precision. In addition, due to the non-contact nature of laser processing, the technology has less damage to the metal surface, and the processing process is environmentally friendly and efficient. The proofing effect is shown in Figure 4.

Ultrafast laser dazzling technology has a wide range of applications in many fields. Here are some specific application areas:

3C industry: can be used for mobile phone shell, laptop and other electronic products surface decoration. By precisely controlling the laser beam, a unique and attractive color texture can be formed on the surface of the product, increasing the visual appeal and market competitiveness of the product.

Metal mold industry: The technology can form smooth, non-oxidized grooves on the surface of the metal mold, which not only show a magic gradient in visual observation, but also have a strong visual impact. At the same time, this kind of multi-end color and Angle reciprocity also has a strong anti-counterfeiting.

Jewelry industry: Jewelry products usually seek uniqueness and personalization. Ultrafast laser dazzling technology can create a rich and colorful dazzling effect on the surface of the jewelry, so that each piece of jewelry has a unique luster and charm, to meet the needs of consumers for personalized customization.

Packaging and printing industry: The application of ultrafast laser color technology on packaging materials can produce packaging products with unique visual effects. This dazzling effect can not only enhance the attractiveness of the product, but also increase the anti-counterfeiting performance of the packaging and improve the safety and credibility of the product.

It should be noted that the application scenario of ultrafast laser dazzling technology is not limited to the above fields, with the continuous development and innovation of technology, there may be more new application fields in the future. At the same time, the requirements for dazzling effects in different fields may also be different, so technical adjustments and optimization need to be made according to specific needs in practical applications.

Please contact us at: 17344079671 (Dr. Hu); 19355180564 (General Manager Xian).