The pressure processing of titanium alloys is more similar to that of steel than to that of non-ferrous metals and alloys. Many process parameters of titanium alloy in calcination, volume stamping and plate stamping are close to those of steel processing. However, there are also some important characteristics that must be paid attention to when pressing chin and Chin alloy.
Although it is generally believed that the hexagonal lattice contained in titanium and titanium alloys has low plasticity when deformed, various pressure processing 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 industrial pure titanium in the cooling state, the ratio is 0.72-0.87, while carbon steel is 0.6-0.65 and stainless steel is 0.4-0.5.
Volume stamping, free calcination and other operations related to the processing of large sections and large sizes of billets are carried out at a heated state (above =yS transition temperature). Calcination and stamping heating temperature range is between 850-1150°C. Alloy BT; M)0, BT1-0, OT4-0 and OT4-1 have satisfactory plastic deformation under cooling. Therefore, the parts made of these alloys are mostly made of blank parts without heating after intermediate annealing. When titanium alloy is deformed in cold plastic, regardless of its chemical composition and mechanical properties, the strength will be greatly increased, and the plasticity will be reduced accordingly, so it must be annealed between processes.