No best answer

1.Nowadays 3D printers can print metal parts. Now the common printing technology is laser selective melting, and various metal powders are formed by laser high-temperature melting, referred to as LSM, which can melt many different metal powders, such as stainless steel, cobalt-chromium alloy , Titanium alloy, die steel, precious metals and other metal powders
2.The principle of laser selective melting forming technology is an advanced laser additive manufacturing technology developed based on the basic principle of prototype manufacturing technology. The three-dimensional digital model of the part is sliced ​​and layered by special software. After obtaining the profile data of each section, the high-energy laser beam is used to selectively melt the metal powder layer by layer according to the profile data. Method, manufacturing three-dimensional solid parts.
3.Laser selective melting forming technology breaks through the conventional thinking of deformation forming and removal forming of traditional manufacturing process. According to the three-dimensional digital model of parts, the use of metal powder can directly obtain solid parts of any complex shape without any fixtures and molds, realizing "net forming". "The \new concept of material processing is especially suitable for the manufacture of difficult-to-machine parts such as titanium alloys and high-temperature alloys with complex internal cavity structures.
4. With the rapid progress of science and technology, the machining industry continues to develop. Rapid prototyping technology, especially laser 3D printing technology, has played an increasingly important role in the machining industry, and has gradually been widely used in the manufacturing industry, becoming an indispensable part of today's machinery manufacturing industry. 3D printing technology is rapidly changing our traditional production methods and lifestyles. Many experts believe that 3D printing manufacturing technology characterized by digitalization, networking, personalization, and customization will promote the third industrial revolution.
5. Metal parts 3D printing technology, as the most cutting-edge and most potential technology in the entire 3D printing system, is an important development direction of advanced manufacturing technology. According to the method of adding metal powder, the metal 3D printing technology is divided into three categories: (1) The pre-spread metal powder is irradiated by laser, that is, the metal part will be completely covered by the powder after the molding is completed. This method is currently widely used by equipment manufacturers and various scientific research institutes, including direct funding
6.It belongs to Direct Metal Laser Sintering (DMLS), Selective laser melting (SLM) and LC (Laser Cusing), etc.; (2) Using laser to irradiate the powder flow conveyed by the nozzle, the laser and conveying powder work at the same time ( Laser Engineered Net Shaping, LENS). This method is currently widely used in China; (3) Electron Beam Melting (EBM) is used to melt the pre-spread metal powder. This method is similar to the first type of principle, but uses a different heat source.