What are the forging methods of titanium metal materials?

Forging is a forming method for manufacturing mechanical parts, workpieces, tools or blanks by applying external force to titanium metal billets (excluding plates) to cause plastic deformation, change size, shape and improve performance. In addition, according to the movement of the slider, there are also vertical and horizontal movement of the slider (used for forging of slender parts, lubrication and cooling, and high-speed production of parts forging), and the use of compensation devices can increase the movement in other directions. The above methods are different, and the required forging force, process, material utilization, output, dimensional tolerance and lubrication and cooling methods are different. These factors are also factors that affect the level of automation. According to the movement of the billet, forging can be divided into free forging, upsetting, extrusion, die forging, closed die forging, and closed upsetting. Grade 12 Ti-0.3Mo-0.8Ni Titanium Foil / F2 Pure Titanium Forging / 6al4v titanium plate

Because closed die forging and closed upsetting have no flash, the utilization rate of materials is high. The finishing of complex forgings can be completed in one or several processes. Because there is no flash, the force area of ​​the forging is reduced and the required load is also reduced. However, it should be noted that the blank cannot be completely restricted. To this end, the volume of the blank should be strictly controlled, the relative position of the forging die should be controlled, and the forging should be measured to reduce the wear of the forging die. According to the movement mode of the forging die, forging can be divided into pendulum rolling, pendulum rotary forging, roll forging, wedge cross rolling, ring rolling and oblique rolling. Pendulum rolling, pendulum rotary forging and ring rolling can also be processed by precision forging. In order to improve the utilization rate of materials, roll forging and cross rolling can be used as the front process of slender materials. Rotary forging, like free forging, is also partially formed. Its advantage is that it can be formed under a smaller forging force than the size of the forging. In this forging method, including free forging, the material expands from the vicinity of the die surface to the free surface during processing, so it is difficult to obtain high precision. Therefore, by controlling the movement direction of the forging die and the rotary forging process with a computer, products with complex shapes and high precision can be obtained with lower forging forces, such as forgings such as turbine blades with many varieties and large sizes. In order to obtain high precision, attention should be paid to preventing overload at the bottom dead center and controlling the speed and die position. Because these will affect the tolerance, shape accuracy and life of forging dies.

In addition, in order to maintain accuracy, attention should also be paid to adjusting the clearance and rigidity of the slider rail, adjusting the bottom dead point and using auxiliary transmission devices. The materials used for titanium forging are mainly pure titanium and titanium alloys of various compositions. The original states of the materials are bars, ingots, metal powders and liquid metals. The ratio of the cross-sectional area of ​​the metal before deformation to the cross-sectional area after deformation is called the forging ratio. Correctly selecting the forging ratio, reasonable heating temperature and holding time, reasonable initial forging temperature and final forging temperature, reasonable deformation amount and deformation speed has a great relationship with improving product quality and reducing costs. Generally, small and medium-sized forgings use round or square bars as blanks. The grain structure and mechanical properties of the bars are uniform and good, the shape and size are accurate, the surface quality is good, and it is easy to organize mass production. As long as the heating temperature and deformation conditions are reasonably controlled, forgings with excellent performance can be forged without large forging deformation.