Metal 3D printing technology powder molding process summary, hot information, as the most important part of metal parts 3D printing industry chain, is also the greatest value. At the World 3D printing industry conference 2013, leading experts in the World 3D printing industry gave a clear definition of 3d printed metal powder, that is, the size of less than 1mm of metal particles. It includes single metal powder, alloy powder and some refractory compound powder with metal property. At present, 3D printing metal powder materials include cobalt-chromium alloy, stainless steel, industrial steel, bronze alloy, titanium alloy and nickel-aluminum alloy. But the 3D printed metal powder must not only possess good plasticity, but also meet the requirements of fine particle size, narrow particle size distribution, high sphericity, good fluidity and high loose density. Due to the different requirements of application and subsequent molding process, the preparation methods of metal powder are also different. According to the preparation process, it mainly includes physical chemistry method and mechanical method. In the Powder metallurgy industry, methods such as electrolysis, reduction and atomization are widely used. However, it should be noted that both methods have their limitations, not suitable for alloy powder preparation. At present, metal powder for additive manufacturing is mainly concentrated in titanium alloy, high temperature alloy, cobalt-chromium alloy, high strength steel and die steel. In order to meet the requirements of additive manufacturing equipment and process, the metal powder must have the characteristics of low content of oxygen and nitrogen, good spherical degree, narrow particle size distribution range and high loose density. At present, the main methods of preparing metal powders for additive manufacturing are plasma rotating electrode (PREP) , plasma atomization (PA) , gas atomization (GA) and plasma spheroidization (PS) , all of them can be used to prepare spherical or near-spherical metal powde
Post time: Jun-16-2023
