AN ADDITIVE MANUFACTURING METHOD OF LEAD-FREE ENVIRONMENTALLY-FRIENDLY HIGH-STRENGTH BRASS ALLOY

摘要

The present invention discloses an additive manufacturing method of lead-free environmentally-friendly high-strength brass alloys, which mainly comprises five steps of gas atomization milling, model building, forming chamber preparation, pre-spreading powder and selective laser forming. Wherein the lead-free environmentally-friendly high-strength brass alloy comprises the following elements: Zn 5.5-40 wt. %, Si 0.5-4 wt. %, trace elements Al and Ti totally 0-0.5 wt. %, and Cu for the balance. Its microstructure includes micron-sized cell crystals and dendrites. By the above method, it is possible to obtain a nearly fully compact high-strength brass alloy and nearly net-formed complex parts thereof. The formed high-strength brass alloy has beautiful color and excellent physical properties such as excellent electrical conductivity, thermal conductivity, corrosion resistance and machinability. It can be widely used in sanitary ware, hardware decoration, radiators, electronic communication, low temperature piping, pressure equipment and other machinery manufacturing fields.