According to the National Robotics Innovation Center, laser powder bed melting is currently the core process for additive manufacturing of titanium alloy precision components, and is widely used in key fields such as aerospace, high-end equipment, and precision manufacturing. However, the microstructure of the Ti-6Al-4V alloy prepared by the traditional LPBF process usually appears as a complete acicular martensite, causing its ductility to decline significantly. The industry generally uses subsequent heat treatment to improve material molding, but these methods still have problems of strength-ductility trade-off, process redundancy, and low manufacturing efficiency. In response to this problem, the center's R&D team recently proposed a new process strategy for in-situ interlayer laser remelting during powder bed melting. The technology uses the unique rapid thermal cycle characteristics of the laser process to control the microstructure of the prepared Ti-6Al-4V alloy without additional subsequent heat treatment processes. While maintaining high strength, the ductility and manufacturing efficiency of the alloy are improved.

According to the National Robotics Innovation Center, laser powder bed melting is currently the core process for additive manufacturing of titanium alloy precision components, and is widely used in key fields such as aerospace, high-end equipment, and precision manufacturing. However, the microstructure of the Ti-6Al-4V alloy prepared by the traditional LPBF process usually appears as a complete acicular martensite, causing its ductility to decline significantly. The industry generally uses subsequent heat treatment to improve material molding, but these methods still have problems of strength-ductility trade-off, process redundancy, and low manufacturing efficiency. In response to this problem, the center's R&D team recently proposed a new process strategy for in-situ interlayer laser remelting during powder bed melting. The technology uses the unique rapid thermal cycle characteristics of the laser process to control the microstructure of the prepared Ti-6Al-4V alloy without additional subsequent heat treatment processes. While maintaining high strength, the ductility and manufacturing efficiency of the alloy are improved.