Manufacturing
Laser tailor welding technology has been widely used in foreign car manufacturing. According to statistics, in 2000, there were more than 100 laser tailor welding production lines for tailored blanks worldwide, with an annual output of 70 million pieces of car component tailor welded blanks, and it continues to grow at a high speed. Some cut blank structures are also adopted for domestic production and introduction models. In Japan, CO2 laser welding is used to replace flash butt welding to connect rolled steel coils in the steel industry. Research on the welding of ultra-thin plates, such as foils with a thickness of less than 100 microns, cannot be fusion welded. However, YAG laser welding with a special output power waveform is successful, showing a broad future of laser welding. Japan has also successfully developed YAG laser welding for the first time in the world for the maintenance of steam generator tubes in nuclear reactors, and has also carried out laser welding technology for gears in China.
Powder metallurgy
With the continuous development of science and technology, many industrial technologies have special requirements for materials, and materials manufactured by smelting and casting methods can no longer meet the needs. As powder metallurgy materials have special properties and manufacturing advantages, they are replacing traditional metallurgy materials in some fields, such as automobile, aircraft, tool and cutting tool manufacturing. With the growing development of powder metallurgy materials, their connection with other parts becomes increasingly prominent, which limits the application of powder metallurgy materials. In the early 1980s, laser welding entered the field of powder metallurgy materials processing with its unique advantages, opening up a new prospect for the application of powder metallurgy materials. For example, the brazing method commonly used in the connection of powder metallurgy materials was used to weld diamonds. Due to the low bonding strength, wide heat affected zone, especially the inability to adapt to high temperatures and high strength requirements, the solder melted and fell off, Laser welding can improve the welding strength and high temperature resistance.