3D printing technology, also known as "rapid forming technology" or "additive manufacturing technology", is based on digital model files, using powdered metal or plastic bonding materials to build objects by layer-by-layer stacking technology.
At present, there are two main factors that restrict the development of 3D printing technology: printing materials and equipment. Material development is more difficult than the development of equipment. 3D printing technology is not complicated and difficult to materialize. The consumables of ordinary printers are ink and paper, but the consumables of 3D printers are mainly glue and powder, and must be specially treated, and the curing reaction speed of materials is also very high. According to the chemical composition, 3D printing materials are classified into metal materials, ceramic materials, composite materials, and polymers.
At present, most 3D printing consumables are plastic, and metal has better mechanical strength and electrical conductivity, and plays a pivotal role in 3D printing. However, the 3D printing manufacturing technology of metallic materials is difficult, mainly because the melting point of metal is relatively high, and the sahod materials mainly include titanium alloy, cobalt chromium alloy, stainless steel and aluminum alloy.
Titanium alloys are particularly valued because of their low density, high strength, corrosion resistance and high melting point. Titanium alloys will have broad application prospects in 3D printing, aerospace and defense industries. Cobalt-chromium alloy is a high-temperature alloy mainly composed of cobalt and chromium. It has excellent corrosion resistance and mechanical properties, and its components are made of high strength and high temperature resistance. Stainless steel is widely used because it is resistant to weak corrosive media such as air, steam, water, and chemically aggressive media such as acids, alkalis, and salts. Stainless steel is the cheapest metal printing material and the printed model has a high strength. Magnesium-aluminum alloys have been widely used in the demand for strong manufacturing in the manufacturing industry because of their light weight and high strength.