Die forging method for titanium alloy disk

Abstract

The invention belongs to the technical field of titanium alloy disk die forging and relates to a die forging method for a titanium alloy disk. The method is a hot machining method capable of improving organization and performance of variable-cross-section titanium alloy disk forgings. According to the method, a forging die and a tool special for secondary-heating are designed and manufactured according to a variable-cross-section structure of titanium alloy die forgings, and cavities matched with the forging die and the tool special for secondary heating correspond to the shapes of the forgings; titanium alloy bars are prepared into annular blanks through an ordinary method; die forging first-heating is completed through an ordinary die, and ring blank positioning and preliminary forming are achieved; and in the secondary-heating production process, the tool special for secondary heating is placed in a lower die body of the ordinary die, then forging is conducted, and final forming of the blanks is completed. By means of the die forging method for the titanium alloy disk, the problems that precious metal is wasted, the filling effect of the forgings is poor, and the final forgings are uneven in organization, substandard in flaw detection and poor in fracture toughness due to multiple heating times and smaller deformation when aircraft engine titanium alloy fan disk forgings are forged through the a traditional die are avoided.

Description

technical field [0001] The invention relates to the technical field of die forging of titanium alloy discs. Background technique [0002] The inner web of the titanium alloy disc is connected to the fan shaft, and the outer side is connected to the fan blades. Due to the structural characteristics, the fan disc has a larger size and a more complex structure. The length of the trapezoid is 180mm to 240mm, the length of the upper side is 20mm to 50mm, the length of the bottom side of the trapezoid is about 200mm, and the bottom side is "concave" shape, the length of the size is 100mm to 180mm, and the depth is 30mm to 80mm. [0003] Usually, there are two ways to design the die diagram of this type of forging: one is to design along the shape of the forging, but this design makes it difficult for the titanium alloy material to be positioned, and the "concave" shape of the forging is not easy to fill. This method is generally not suitable. Adopted; in order to ensure the filli...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to avoid the waste of rare and precious metals, poor filling effect of forgings, more fire times, and smaller deformation die forgings resulting in uneven structure of final forgings and flaw detection when titanium alloy disc forgings are forged with traditional dies. The problem of substandard and poor fracture toughness