3D Printable Stainless Steel Alloy with Antibacterial Properties for Orthopedic Implants

摘要

An austenitic stainless steel alloy having antibacterial properties, corrosion resistance properties, and good hardness and strength is provided. A method of manufacturing by gas atomization, metal additive manufacturing, and heat treatment is also provided. The stainless steel alloy composition and powder consisting of chromium (Cr), molybdenum (Mo), manganese (Mn), nickel (Ni), copper (Cu), silicon (Si), nitrogen (N), carbon (C) and iron (Fe) is described. The alloy can be processed into spherical powder by gas atomization or other methods suitable for metal additive manufacturing or metal 3D printing. The powder can be processed by metal additive manufacturing into articles. Heat treatment promotes the formation of copper nanoprecipitates leading to excellent antibacterial properties and good mechanical properties. The constituent elements of the alloy provide for good corrosion resistance.