High-temperature alloy disc die forging method

Abstract

The invention belongs to the technical field of high-temperature alloy die forging, and particularly relates to a high-temperature alloy turbine disc forge piece organization and performance thermal machining method. A performing die forging plus bearizing plus die forging method includes the steps that the specification and size of the wild shape required by finish forging are determined, a finish forging die and a performing die forging die are prepared, performing die forging is conducted, bearizing is conducted till the wild shape required by the finish forging is formed, and the finish forging is conducted; an annular blank is determined according to the forge piece shape to serve as the wild shape; first-fire forging of a titanium alloy bar is forged through the performing die, and the heating number integrates traditional upsetting, punching and saddling processes; preformed forge piece core materials generated after forming die forging is conducted are removed; bearizing is conducted on a performing forge piece till the wild shape size required by finish forging is formed; one-fire finish forging is conducted till forming is finished. According to the method, the problems that the final forge piece of the high-temperature alloy turbine disc forge piece is uneven in organization and residual stress due to the blank making process of more heating numbers and smaller deformation are avoided.

Description

technical field [0001] The invention relates to the technical field of forging in which the inner hole of a superalloy die forging is larger than Φ400mm, the height is about 70 to 130mm, and the weight is about 150 to 250Kg. Background technique [0002] The inner hole is larger than Φ400mm, the height is about 70 to 130mm, and the weight is about 150 to 250Kg. The usual forging method is to go through the bar heating upsetting, heating punching, machining, heating and reaming. Finally, die forging is carried out; but the above method has the following problems: firstly, there are many times of forging before die forging, and the billet making process with more small deformations leads to poor uniformity of the billet structure, which eventually leads to the forging structure after die forging Uneven, uneven distribution of residual stress, reduced mechanical properties, shortened fatigue life; second: high requirements for equipment capacity, small amount of punching and re...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to avoid the non-uniform structure and uneven residual stress of the final forgings caused by the high-temperature alloy turbine disc forging, more firing times, and smaller deformation billet making process