What Should Be Considered In The Matching Between Metal Powder On Laser Selective Melting Used For Additive Manufacturing Dental Restoration And Printing Parameters？

As per NMPA CMDE Department 4, the matching between metal powder and printing parameters involves the manufacturing process of powder and the key process parameters of printing equipment. For the manufacturing process, the key process principles and selection basis (such as electrode induction melting gas atomization, plasma inert gas atomization, vacuum induction melting gas atomization, plasma rotating electrode atomization, etc.) shall be submitted, and the key process parameters shall be submitted (such as gas pressure, flow rate and temperature, inner diameter and injection angle of atomization nozzle, pressure and oxygen content in atomization tower, current and speed of rotary electrode atomization process, etc.), and submit relevant research V&V data. For the matching with the key process parameters of printing equipment, it should consider the process parameters such as laser power, spot diameter, scanning speed, scanning spacing, powder laying thickness, printing direction, atmosphere protection, support structure, forming chamber temperature, and submit relevant research V&V data.