Titanium alloy is an alloy composed of titanium and other elements. Titanium has two isomorphic crystals. Titanium is a isomorphic crystal with a melting point of1720 C. Below 882 C, it has a close-packed hexagonal lattice structure, and above 882 C, it has a body-centered cubic lattice structure, which is called B titanium. According to the different characteristics of the above two structures of titanium, appropriate alloying elements are added to make its phase transition temperature.
Matters needing attention in the use of titanium alloy
It should be noted that the hexagonal lattice contained in titanium and titanium alloys has low plasticity during deformation, but various pressure working methods used for other structural metals are also suitable for titanium alloys. The ratio of yield point to strength limit is one of the characteristic indexes of whether a metal can withstand plastic deformation. The greater the ratio, the worse the plasticity of the metal. For cooled industrial pure titanium, the ratio is 0.72-0.87, while carbon steel is 0.6-0.65 and stainless steel is 0.4-0.5.
Due to the heat resistance of titanium, cooling is very important in the machining process, and the purpose of cooling is to prevent the surfaces of blades and tools from overheating. When the end face coolant is used, the best chip removal effect can be obtained when square shoulder milling and end face milling grooves, cavities or complete grooves. When cutting titanium metal, chips are easy to stick to the blade, which causes the next round of milling cutter to rotate, and cutting chips again often causes the edge line to collapse.
The above contents refer to Baidu Encyclopedia-Titanium Gold.