Hyundai Steel has secured a patent for an advanced method of manufacturing aluminum-coated blanks using laser beam irradiation, promising to revolutionize the production of aluminum-coated steel sheets. This cutting-edge process involves meticulous control over various parameters, such as the pattern angle, laser beam frequency, power, and coating weight, to create a robust and precise joint.
The newly patented technology (Publication Number: US11958131B2) by Hyundai Steel employs laser beam irradiation to join aluminum-coated steel sheets with the assistance of a filler wire. This method begins by aligning two or more aluminum-coated steel sheets, then utilizing a laser beam to melt the facing portions of the sheets and filler wire, forming a strong joint. The pattern angle for the joint ranges from about 45° to less than 90°, with the laser beam operating at frequencies between 100 to 1,500 Hz and power settings from 1 to 20 kW.
Hyundai Steel's innovation is rooted in its precise control of the laser welding process. The joint formation speed, laser beam radius, and the specific composition of the aluminum-coated steel sheets are critical factors detailed in the patent claims. The method involves moving both the coated steel sheets and the laser head during the irradiation process, ensuring the formation of the pattern angle. Additionally, the filler wire used in this method may contain manganese, which contributes to the integrity of the joint by ensuring the correct aluminum composition and preventing ferrite formation at high temperatures.
The relationship between the laser beam's frequency, its radius, and the joint formation speed is crucial for maintaining the quality and integrity of the joint. Hyundai Steel's patented method ensures that these parameters are meticulously controlled and balanced, resulting in high-quality aluminum-coated blanks. This innovative technique not only enhances the mechanical properties of the joints but also improves the overall efficiency of the manufacturing process.
Hyundai Steel's laser welding method for aluminum-coated steel sheets represents a significant advancement in the field of materials engineering. By focusing on specific parameters and compositions, the company has developed a precise and efficient method for creating strong and durable joints in aluminum-coated blanks. This innovation is expected to have wide-ranging applications in various industries, particularly those requiring high-strength and corrosion-resistant materials.
The patent reflects Hyundai Steel's commitment to advancing manufacturing technologies and maintaining its position as a leader in the steel industry. The company’s focus on innovative solutions, such as this laser welding method, aligns with its broader strategy of enhancing product quality and operational efficiency. Furthermore, Hyundai Steel's emphasis on sustainable practices, such as using renewable electricity in its production processes, underscores its dedication to environmental responsibility.
